JP2008071058A - Device, method and program for reproducing sound - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automobile obstacle warning system having a higher added value. <P>SOLUTION: A set of music data A, B, C, D is stored and retained as alarm sounds. For example, the music data have different contents of sound and higher tension in the order from, e.g., the music data A to D. The distance Dis to an obstacle is detected by an obstacle distance sensor and the corresponding one among the music data A, B, C, D is selected according to the distance Dis and output for reproduction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a sound reproducing device and method provided in a moving body that moves when a driver performs a driving operation, such as an automobile. The present invention also relates to a program executed by such a sound reproducing device.

  As a warning system mounted on a car or the like, a warning system that detects the presence of an obstacle around the car with a sensor and outputs a warning sound so that the driver can hear it is known. As such an obstacle warning system, the driver can grasp the approximate distance to the obstacle by changing the warning sound pattern according to the distance between the vehicle and the obstacle detected by the sensor. There are many things like this.

Japanese Patent Laid-Open No. 5-58219

  However, since the warning sound pattern is formed by setting the sound interval and pitch of a single sound called a beep sound, for example, it feels inorganic to the driver. It doesn't always sound comfortable. Therefore, it is preferable for the driver to obtain a good audibility without impairing the warning function with respect to the sound as the warning sound as described above, and the added value as the warning system is increased.

In view of the above-described problems, the present invention is configured as follows as an audio reproducing apparatus.
In other words, the music data holding means for holding a plurality of music data each having different reproduction contents and the music data held in the music data holding means as audio so that the driver of the mobile body can listen Music reproduction output means for reproducing and output, detection information input means for inputting detection information obtained by detecting a predetermined state that can be changed according to the driving of the moving body performed by the driver, and this detection information input means In accordance with the detection information input in step 1, a piece of music data is selected from a plurality of pieces of music data held in the music data holding means, and the selected music data is reproduced and output in a predetermined manner by the music reproduction output means. And a music reproduction control means adapted to be provided.

In addition, the audio reproducing apparatus is configured as follows.
Music data holding means for holding one piece of music data formed so that a plurality of music section parts each having different reproduction contents are connected in a predetermined order, and held in the music data holding means The music reproduction output means for reproducing and outputting the existing music data as audio so that the driver of the mobile body can hear, and a predetermined state that can be changed according to the driving of the mobile body that the driver is supposed to perform is detected. Detecting information input means for inputting the detection information obtained in the above, and according to the detection information input by the detection information input means, one music section part is selected from the music data held in the music data holding means, Music reproduction control means adapted to reproduce and output the music data portion which is supposed to correspond to the selected music section part in a predetermined manner by the music reproduction output means; It was.

In addition, the “moving body” in each of the above-described configurations refers to things that can be moved by a driver performing an operation such as a car. In addition, the “predetermined state” here refers to a specific state that can change according to the driving of the moving body by the driver, including the distance from the moving body to a certain object.
And according to said each structure, about the predetermined state which can change according to a driving | running | working of a moving body by a driver | operator, the music reproduced | regenerated and output as a sound according to an actual change, or the area in one music The part is made to switch. In other words, as the audio output in response to the change in the predetermined state, for example, the beep sound pattern is not changed, but the content as the music is only changed.

  As a result, according to the present invention, for example, when a warning sound is output regarding the operation of the moving body, a sound as a music is output instead of a simple beep sound or electronic sound pattern. Accordingly, the driver can listen to the functional sound as a warning sound that is more comfortable to listen to, and the system that outputs the warning sound can give higher added value than before.

  Hereinafter, the best mode for carrying out the present invention (hereinafter referred to as an embodiment) will be described. As an embodiment of the present invention, an audio reproduction based on the present invention is applied to a warning system which is configured to give a warning and notification to a driver of an automobile, which is one of moving bodies, according to a predetermined situation and state. A case where the apparatus is applied will be described as an example.

FIG. 1 shows a configuration example of a warning system corresponding to the first embodiment.
The warning system shown in this figure is composed of an obstacle distance sensor 1 and a car audio device 2.
The obstacle distance sensor 1 is attached to a predetermined position in the front and rear of the body of the automobile, for example, and outputs a detection signal corresponding to the distance to the obstacle in the vicinity thereof. -1 to 11-n, and a detection circuit 12 that takes in the detection signals output from these sensors and generates and outputs distance detection information indicating the distance to the obstacle.
In addition, as a structure for measuring and detecting the distance to the obstacle by the obstacle distance sensor 1, a technique that has been known so far may be employed. For example, as the sensors 11-1 to 11-n, an ultrasonic wave is transmitted and output by a transmitter, a reflected component of the transmitted ultrasonic wave is received, and a time difference between the transmission timing of the ultrasonic wave and the reception timing is received. A signal corresponding to the above is output as a detection signal.
The detection circuit 12 obtains information on the distance to the obstacle using the detection signals taken from each of the sensors 11-1 to 11-n. The distance information acquired in this way is output to the outside as distance detection information. In the configuration of the present embodiment, the detection circuit 12 can generate and output a plurality of distance detection information corresponding to at least the arrangement positions of the sensors 11-1 to 11-n. However, in order to make the following explanation simple and easy to understand, the detection circuit 12 is the shortest distance among the distances detected by the detection signals from the sensors 11-1 to 11-n, for example. It is assumed that one piece of distance detection information indicating is output.

  The car audio device 2 has an original function of reproducing and outputting a sound source such as a musical piece as a sound for a passenger's entertainment, for example, as shown in FIG. The music data storage unit 22, the audio output processing unit 23, and the control unit 25 are configured to be connected via an internal bus.

  The sound source unit 21 has an audio signal (audio data) as a sound source to be a song or the like, and outputs an audio signal of a specified song to the audio output processing unit 23 according to the control of the control unit 25, for example. To be done. As the actual sound source unit 21, for example, in the present situation, in addition to the digital audio data stored in the HDD (Hard Disc Drive) so as to be managed in file units, in track units or file units. Disc media such as CDs (Compact Discs) and DVDs (Digital Versatile Discs) in which digital audio data is stored as managed, memory media such as flash memory, and drives corresponding to these media The

The warning music data storage unit 22 stores and holds music data to be reproduced and output as sound in order to fulfill a function as a warning sound. The music data (audio data) stored in the warning music data storage unit 22 is read out under the control of the control unit 25 and transferred to the audio output processing unit 23 via the internal bus 26, for example.
An example of the contents of the music data stored in the warning music data storage unit 22 will be described later. Further, as an actual example of the warning music data storage unit 22, for example, it is conceivable to use a partial storage area of a ROM provided in the control unit 25. Alternatively, a non-volatile storage medium such as a flash memory or HDD may be employed. Further, when a flash memory is employed, for example, if the control unit 25 has a flash memory for storing and saving various setting information and programs, this can be used. Also, when an HDD is employed, if the car audio apparatus 2 includes an HDD for storing the sound source unit 21 and programs, this can be used.

  The audio output processing unit 23 performs, for example, decompression processing, sound quality adjustment, and volume adjustment for compression coding on the audio data from the sound source unit 21 or the music data from the warning music data storage unit 22 input as described above. A predetermined process including the above is performed to perform amplification, and finally output from the speaker 24 as sound. Note that the audio output processing unit 23 may actually be configured to perform audio reproduction corresponding to a so-called multi-channel represented by a stereo channel or 5.1ch surround, but the illustration is simplified here. For convenience of explanation, only the audio output system for one channel is shown.

The control unit 25 is mainly configured by a microcomputer formed by a CPU, a ROM, a RAM, and the like, and executes various control processes in the car audio device 2.
Actually, various operators (or a remote control device or the like) for the passenger to operate the car audio device 2 are provided, and the control unit 25 is operated in accordance with operations performed on these operators. However, this configuration is not shown in the figure.

  In this case, the control unit 25 inputs distance detection information output from the obstacle distance sensor 1 (detection circuit 12). Actually, for example, a harness and a cable for outputting distance detection information drawn out from the device as the obstacle distance sensor 1 are connected to a predetermined input terminal on the car audio device 2 side. Accordingly, distance detection information is input from the input terminal to the control unit 25 (CPU) through, for example, a predetermined port.

And in the car audio apparatus 2 of this Embodiment, it is comprised so that the warning sound according to the distance to an obstacle may be output based on the distance detection information input from the obstacle distance sensor 1 as mentioned above. Is done. Such a basic example of the obstacle warning operation by the car audio apparatus 2 of the present embodiment will be described with reference to FIG.
In FIG. 2, a situation is assumed in which the automobile 100 on which the warning system (the obstacle distance sensor 1 and the car audio device 2) of this embodiment is mounted approaches the obstacle 101 while backing.
First, as shown in FIG. 2A, in the state where the distance L from the rear end portion of the vehicle (arrangement position of the sensor 11 at the rear of the vehicle) to the obstacle 101 exceeds 2.0 m, an obstacle warning is performed. No warning sound is output. Next, when the distance L is shortened from within 2.0 m to over 1.5 m as shown in FIG. 2 (b), as the automobile 100 further travels backward from the state of FIG. 2 (a), Is configured to output the sound of music A as a warning sound. Also, for example, once the music A is output to the end, if the distance L is still within the range from within 2.0 m to more than 1.5 m, the music A is output again from the beginning. That is, in a state where the distance L is within a range from 2.0 m to more than 1.5 m, the music A is repeated and the sound is output.
Further, suppose that the automobile 100 further travels backward from the state of FIG. 2 (b) and the distance L is shortened from within 1.5 m to over 1.0 m as shown in FIG. 2 (c). Instead of the music A that has been output so far, another music B is repeatedly output. Furthermore, if the automobile 100 travels backward and the distance L is shortened from within 1.0 m to over 0.5 m, as shown in FIG. The song C is repeatedly output.
If the distance L is within 0.5 m as shown in FIG. 2 (e) as the automobile 100 further travels backward, another song D is used instead of the song C thus far. Is output as audio. However, if the music D is not output repeatedly but is output from the beginning to the end of the music (one time), the output is stopped as it is. This is set based on the idea that the distance L shown in FIG. 2 (e) is a distance that the driver should brake to stop the automobile. In other words, since the music D is a warning sound that informs the distance to the obstacle, the driver (and the passenger) may feel uncomfortable if the warning sound is output even though the car has stopped. In consideration of this, the output is stopped without repeating the output.

According to the description of FIG. 2 above, as a basic operation of the obstacle warning according to the first embodiment, the distance L from the automobile (sensor 11) to which the warning sound should be output to the obstacle is, for example, 2.0 m. 2 (b) to 2 (e), the distance L is further divided into four stages as shown in FIGS. 2 (b) to 2 (e). A, B, C, and D are output as sound.
Here, for example, as the audio contents that can be reproduced and listened to each of the songs A, B, C, and D, the tone of the song A, B, C, and D is increased in order of tension and tension. It is supposed to be. As a result, the driver who is listening to the music as the warning sound function switches the music A, B, C, and D that the distance to the obstacle becomes shorter as the car moves and advances. It can be perceived by the tension of the tune and the increasing tension.

For example, as described above, changing the content of the warning sound according to the detected distance from the automobile to the obstacle is something that has been done so far. However, so far, the warning sound is not a musical piece, it is based solely on beep sounds and single-shot sounds that are similar to them. The content of the warning sound is changed by forming a pronunciation pattern by changing.
On the other hand, in the present embodiment, the content of the warning sound is changed by changing the music. In this way, firstly, the warning sound is made into a music so that the user does not feel or feel uncomfortable or uncomfortable like a conventional single sounding. Can do. In addition, since it is considered as a song, the melody and arrangement of each song can be considered in various ways, so it can also function as a warning sound, but also enjoy entertainment such as enjoying watching a song. It is possible to provide. Thus, as the warning system of the present embodiment, for example, a system with higher added value can be provided as compared with the conventional system.

Subsequently, a technique configuration example for realizing the obstacle warning operation as the first embodiment shown in FIG. 2 will be described.
First, in the description with reference to FIG. 2, four music pieces A, B, C, and D are used as warning sounds, and these are output as sounds, but the sound sources of these music pieces A, B, C, and D are used. Are stored in the warning music data storage unit 22 as music data of a predetermined format and a predetermined structure. Therefore, FIG. 3 shows an example of the contents of the music data stored in the warning music data storage unit 22 corresponding to the first embodiment.
FIG. 2 shows a case where four pieces of music data A, B, C, and D are stored in the data storage area as the warning music data storage unit 22. The music data A, B, C, and D are each set as audio data in a predetermined format, and are managed in units of files, for example. Then, for each piece of music data A, B, C, and D, the audio contents obtained by playing the audio data file have the reproduction contents as the music pieces A, B, C, and D described with reference to FIG. It is said.
In addition, it can be said that the music pieces A, B, C, and D form a set in that they are used for obstacle warnings. B, C, and D are also managed as one set. Here, such a set composed of a plurality of music data is referred to as a music data set.

Next, an example of a processing procedure executed by the control unit 25 in order to realize the obstacle warning operation as the first embodiment is shown in the flowchart of FIG.
Note that the procedure shown in this figure can be regarded as a processing operation realized by the CPU executing a program stored in a storage device such as a ROM in the control unit 25. Such a program is written and stored in the ROM at the time of manufacture, for example, as described above, or stored in a removable storage medium and then installed from this storage medium. It can be considered that the audio device 2 is stored in an appropriate storage device or storage medium. In addition, the car audio device 2 is provided with a network communication function after being stored in a storage device in a server or the like on a network, downloaded from the server, acquired, and installed in a predetermined storage device or storage medium. It is possible to make it. This also applies to flowcharts such as FIGS. 6 and 8 described later.

First, as a premise, when the warning system shown in FIG. 1 is activated, the control unit 25 of the car audio apparatus 2 fetches distance detection information from the obstacle distance sensor 1 at regular intervals, and this fetched distance detection. It is assumed that the operation is performed so as to obtain the value as the detection distance Dis from the information. The value as the detection distance Dis obtained in this way indicates the distance from the automobile (sensor 11) to the obstacle, as can be understood from the description of the obstacle distance sensor 1 described above.
In addition, in step S101 in FIG. 4, it is determined whether or not the value of the detection distance Dis obtained as described above is 2.0 m or less (Dis ≦ 2.0 m). If a negative determination result is obtained here, that is, if the distance from the automobile (sensor 11) to the obstacle exceeds 2.0 m, the routine shown in this figure is once ended and the following should be performed. At timing, the process returns to step S101. On the other hand, if a positive determination result is obtained in step S101 on the assumption that the value of the detection distance Dis is 2.0 m or less, the procedure proceeds to step S102 and subsequent steps. Note that when a positive determination result is obtained in step S101, the distance from the vehicle to the obstacle exceeds 2.0 m, as shown, for example, as a transition from FIG. 2 (a) to FIG. 2 (b). Corresponds to the situation changed from 2.0 to below 2.0.

In step S102, control processing related to audio reproduction of the music data A among the music data sets (music data A, B, C, D) stored in the warning music data storage unit 22 illustrated in FIG. Run as follows:
In step S102, first, a determination is made as to whether or not the music data A is being reproduced and output. At this time, any of the music data B, C, and D other than the music data A is being reproduced, or no music data is being reproduced yet, and the music data A is not reproduced and output. If it is determined, control processing for starting reproduction output of the music data A is executed. That is, if any of the music data B, C, D has been reproduced so far, the control unit 25 (CPU) stops the reproduction and stores it in the warning music data storage unit 22. The music data A is selected as the music data to be reproduced from the music data sets (music data A, B, C, D). Then, the audio data file of the music data A is designated and read out from the warning music data storage unit 22 and input to the audio output processing unit 23, and then the audio data of the music data A is reproduced and output as audio. The audio output processing unit 23 is controlled as described above. In this way, in response to the situation or state where the distance to the obstacle changes from more than 2.0 m to less than 2.0 m, the sound output of song A is started as a warning sound. If it is determined that the music data A is already being reproduced and output at the stage of S102, the reproduction output of the music data A so far is continued as this step S102. However, as a result of continuing the reproduction output of the music data A, when the audio output of the music A for one chorus is completed as a result of the reproduction and output all the way to the end of the music data A, the music data again The reproduction of music data A is continued by starting reproduction from the beginning of A. That is, the sound output of the music piece A is repeated.

Assuming that the reproduction output of the music data A is started by the procedure as step S102 as described above, subsequently, the determination about the value indicated by the current detection distance Dis (unit is m) is made at step S103. To be done.
Assume that the determination result in step S103 is determined to be 1.5 <Dis ≦ 2.0, for example. This determination result corresponds to the situation where the distance L from the automobile 100 to the obstacle 101 is shown in FIG. In response to the determination result, the process returns to step S102 to start or continue the reproduction output of the music data A. In other words, the determination result of the previous step S103 is also 1.5 <Dis ≦ 2.0, and if the distance L is over 1.5 m to 2.0 m or less, until then, The reproduction output of the music data A is continued. Alternatively, when the determination result at the previous step S103 is 1.0 <Dis ≦ 1.5, which will be described later, and the process reaches step S104 (however, depending on the execution timing (time interval) setting of step S103, 0.5 <Dis ≦ 1.0). In other words, when the distance L is longer from 1.0 m to 1.5 m and from 1.5 m to 2.0 m, the distance L is longer than 1.5 m to 2.0 m. The reproduction output of the music data B (or music data C) is stopped and then the reproduction output of the music data A is started.

If it is determined in step S103 that 1.0 <Dis ≦ 1.5 corresponding to the distance L in FIG. 2C, the process proceeds to step S104.
In step S104, control processing related to reproduction output of the music data B is executed in accordance with step S102. That is, according to the determination result of the previous step S103 being 1.5 <Dis ≦ 2.0 or 0.5 <Dis ≦ 1.0, either of the music data A and C has been reproduced and output so far. If the music data B has not been reproduced and output, the reproduction output of the music data B is stopped and then the reproduction output of the music data B is started.
Also, if the determination result of the previous step S103 is 1.0 <Dis ≦ 1.5 as well as this time, and the music data B has been reproduced and output up to the present time, The reproduction output of data B is continued.

If it is determined in step S103 that the determination result is 0.5 <Dis ≦ 1.0 corresponding to the situation of the distance L in FIG. 2D, the process proceeds to step S105.
Also in step S105, for example, control processing related to reproduction output of the music data C is executed in accordance with step S102 or step S104. In this case, for example, if the determination result in the previous step S103 is 1.0 <Dis ≦ 1.5, and if the music data B is being reproduced and output up to the present time, the process up to now is performed. The reproduction output of the music data C is stopped and the reproduction output of the music data C is started.
If the determination result of the previous step S103 is 0.5 <Dis ≦ 1.0 as well as this time, and the music data C has been reproduced and output up to the present time, The reproduction output of data C is continued.
After the steps S104 and S105 are completed, the process returns to the determination of the value of the detection distance Dis in step S103.

If it is determined in step S103 that the result of Dis ≦ 0.5 corresponding to the distance L in FIG. 2E is obtained, the process proceeds to step S106.
In step S106, for example, the reproduction output of the music data C is stopped, and then the reproduction output of the music data D is started. However, in step S106, the repeat reproduction is not performed, and the process is completed by executing a control process for reproducing and outputting the music data D once from the beginning to the end. As a result, the operation of outputting one chorus of the music D only once as described with reference to FIG. 2 is obtained. When the procedure of step S106 is completed, the processing shown in this figure is temporarily exited without returning to step S103, for example, and then the processing returns to step S101 at a predetermined timing.

If it is determined in step S103 that 2.0 <Dis, which corresponds to the distance L in FIG. 2A, the process proceeds to step S107. Note that the case of proceeding to step S107 does not describe the situation in FIG. 2, but it is assumed that, for example, the music data A is reproduced with the detection distance Dis being 1.5 <Dis ≦ 2.0. Therefore, the detection distance Dis returns to over 2.0 m again.
In this case, for example, with respect to the music data A that has been reproduced and output so far, the audio output processing unit 23 is controlled so that the reproduced audio fades out, and then the reproduction output is terminated. As a result of this control, the sound of the music A that has been output so far is made to disappear while fading out.
Note that the reason why step S107 is set as described above is as follows.
Having reached step S107 may be considered that a safe distance L has been secured as a result of the vehicle gradually moving away from the obstacle. Therefore, it is necessary to stop the warning sound that has been output so far (cancel the warning sound output). However, since the warning sound in this case is a music, for example, if the playback of the music data so far is stopped immediately, the sound of the music that has been flowing in the room is suddenly interrupted to the passenger. In this way, it is not preferable because it may be heard and discomfort may be felt. Therefore, in step S107, the reproduction music is stopped with a fade-out, so that, for example, even in the middle of the music, the sound output can be naturally terminated.
Further, depending on the execution timing of step S103, the process may skip the process in which the detection distance Dis is determined as 1.5 <Dis ≦ 2.0. For example, the previous determination result may be 1.0 <Dis ≦ 1.5 or 0.5 <Dis ≦ 1.0. In this case, it is considered that the determination result of this time may be 2.0 <Dis. In this case, the reproduction of the music data B or the music data C up to that time is interrupted, and the music data A is reproduced to be predetermined. Fade out at the timing.
And after performing the procedure of step S107 as mentioned above, it returns to step S101 at a predetermined timing.

  Next, a second embodiment of the present invention will be described. The warning system corresponding to the second embodiment is the same as the configuration shown in FIG. However, as described below, the data content stored in the warning music data storage unit 22 is different from that of the first embodiment.

In the second embodiment, the data to be stored and held in the warning music data storage unit 22 for obstacle warning is 1 instead of one music data set corresponding to the first embodiment. There is only an audio data file as one piece of music data (warning music data).
An example of the contents of a music (warning music) that can be reproduced by outputting this music data for warning is shown as a score in FIG. In the score shown in this figure, the main melody of the warning music is recorded.
In this case, the music for warning is composed of 6 bars. In addition, the first bar and the second bar at the beginning have the same scale pattern by a half note, and the third bar has a scale pattern having a pitch higher than the first bar and the second bar by a quarter note. The bar is composed of the same quarter note, but has a scale pattern with a pitch higher than that of the third bar. The fifth bar and the sixth bar give the melody a sense of tension and end, and complete one chorus.
In addition, in the second embodiment, the entire configuration of such a warning music piece is divided into a first music section section composed of the first measure and the second measure, and a second music section section composed only of the third measure. The third music section part consisting of only the fourth measure and the fourth music section part consisting of the fifth measure and the sixth measure are divided and handled. This warning music is the same as in the first embodiment, in which the tone and tension are increased in the order of music A, B, C, D. It is configured as a tune that increases tension and tension in the order of one music section, second music section, third music section, and fourth music section. That is, one piece of music data in this case can be regarded as being formed by connecting a plurality of music section parts each having different reproduction contents in a predetermined order.

And on the premise of the structure of the music data for warning described above, as a second embodiment, as an obstacle warning operation, instead of music A, B, C, D according to the value of the detection distance Dis, Audio data corresponding to the first music section, the second music section, the third music section, and the fourth music section that are to form the warning music data is selected and reproduced and output. .
That is, in the second embodiment, in the state where the distance L from the automobile 100 to the obstacle 101 is 2.0 m ≧ L> 1.5 m as shown in FIG. The first music section is played back repeatedly, and as shown in FIG. 2C, in the state where 1.5 m ≧ L> 1.0 m, the second music section is played back repeatedly and shown in FIG. Thus, in the state where 1.0 m ≧ L> 0.5 m, the third music section is repeatedly reproduced, and in the state where 0.5 m ≧ L, as shown in FIG. The part is reproduced and output only once and is terminated.

FIG. 6 shows a procedure example executed by the control unit 25 in order to obtain an obstacle warning operation as the second embodiment. In this figure, the description of the procedure content that is the same as or similar to that of FIG. 4 corresponding to the first embodiment is omitted, and here, the difference is mainly described. .
Here, each of the procedures of steps S201 to S207 shown in FIG. 6 corresponds to steps S101 to S107 shown in FIG. 4, and the processing content of the control unit 25 in each step also conforms to FIG.
However, in step S202, instead of executing the control relating to the reproduction output of the music data A in step S101 of FIG. 4, the reproduction output of the audio data corresponding to the first music section portion in the warning music data. Control to be executed.
As a control process of the control unit 25 for this purpose, first, the control unit 25 is divided into first to fourth music section parts in the warning music data (audio data file) stored in the warning music data storage unit 22. Information indicating the data position is given in advance. For example, if the data file is managed as a unit of sectors in accordance with the FAT file system, the delimiter data position can be represented by the order of sectors in the data file. In addition, if the playback time information is embedded in the audio data file with a predetermined structure, the playback data can indicate the delimited data position. Then, in step S202, the data as the first music section in the warning music data in the warning music data storage unit 22 is accessed and read out, and the audio output processing unit 23 performs the audio reproduction. Control is performed as is done.

  Further, in step S204, instead of the music data B to be processed in step S104, control related to reproduction output for the audio data corresponding to the second music section is executed. In step S205, step S105 is executed. In step S206, the music data that was the processing target in step S106 is executed in place of the music data C that was the processing target in step S206. Instead of D, control relating to reproduction output of audio data corresponding to the fourth music section is executed. Further, in step S207, control is executed so that the audio reproduction of the first music section portion is terminated by fading out instead of the music data A that is the processing target in step S107.

Next, a third embodiment of the present invention will be described.
First, the warning system corresponding to the third embodiment includes a car navigation device 3 as shown in FIG.
For example, as shown in the figure, the car navigation device 3 includes a display unit 30, a map data storage unit 31, an alarm music data storage unit 32, an audio output processing unit 33, a speaker 34, a control unit 35, a GPS reception unit 37, an acceleration. A sensor 38 and a speed sensor 39 are provided. In the configuration shown in this figure, among these functional units, the display unit 30, the map data storage unit 31, the alarm music data storage unit 32, the audio output processing unit 33, and the control unit 35 are connected by an internal bus 36. is doing.

The display unit 30 is formed with a predetermined image display device. Under the control of the control unit 35, an image having a desired content such as a navigation image and various setting screen images is displayed. It is a part to be done.
The map data storage unit 31 is a part for storing and holding so-called map data used for the display of the navigation image and various navigation-related processes. There are no particular limitations on the type of storage medium to be used as such a map data storage unit 31 and the hardware / software configuration. For example, HDDs are widely used in the present situation. Alternatively, the map data is stored in various removable storage media such as a CD-R, DVD (Digital versatile disc), flash memory, etc., and a drive corresponding to these storage media is provided. It may be said. Furthermore, a technical configuration for receiving and acquiring map information provided by wireless communication in real time is also known and is being used, but instead of the map data storage unit 31, such map data A reception acquisition function may be provided.
The warning music data storage unit 32 is an area in which warning music data is to be stored in the same manner as the warning music data storage unit 22 of FIG.
In addition, the audio output processing unit 33 in this case, for example, navigation audio, playback audio of warning music data stored in the warning music data storage unit 32, and other warnings, notification audio, etc. Audio signal processing for outputting as sound from the speaker 24 is executed under the control of the control unit 35.

  The control unit 25 is configured mainly with a microcomputer formed by, for example, a CPU, a ROM, a RAM, and the like, and executes various control processes. Also in this figure, illustration of input operation means for operating the navigation device 3 by the passenger is omitted.

The GPS receiving unit 37 is a functional part that can receive radio waves transmitted from a GPS (Global Positioning System) satellite and execute positioning calculation to acquire positioning information. Here, at least the current position information is present as positioning information. Information on the position (for example, expressed by latitude / longitude) is acquired.
Further, the acceleration sensor 38 includes a gyro, for example, so as to detect the acceleration of the automobile (own vehicle) on which the warning system of the present embodiment is mounted. Further, the acceleration sensor 38 includes a geomagnetic sensor or the like, so that it is possible to detect the direction (traveling direction) in which the automobile travels along with the acceleration. The speed sensor 39 includes, for example, a vehicle speed sensor and detects the traveling speed of the automobile.
The control unit 35 corresponds to the navigation function, and includes positioning information (current position information) captured from the GPS receiving unit 37, acceleration and travel direction detection information captured from the acceleration sensor 38, and travel speed information captured from the speed sensor 39. For example, the position of the automobile on the map data stored in the map data storage unit 31 is specified. As is well known, the position of the vehicle is basically specified by the positioning information fetched from the GPS receiver 37, but the radio wave from the GPS satellite, such as running for a long time in a tunnel, etc. During a period in which the signal cannot be received, information such as acceleration, traveling direction, and speed obtained by an acceleration sensor, a speed sensor, or the like is used to specify a current position that can change every moment. Using the position of the vehicle (own vehicle) specified in this way, for example, an operation related to navigation such as displaying a navigation image showing the position of the vehicle on a map image on the display unit 21 is executed. To be done. Note that the display of the map image may be performed using map image data stored as a part of the map data in the map data storage unit 31 according to, for example, a well-known technique.

  And the car navigation apparatus 3 of this Embodiment can perform various operation | movement as a car navigation function known until now including the above operation | movement by adopting the structure of FIG. Is done. Then, the following warning action is executed.

In the configuration of the car navigation device 3 shown in FIG. 7, a speed sensor 39 is provided for detecting the position of the host vehicle, whereby information on the traveling speed of the host vehicle can be acquired.
Therefore, as a warning operation of the third embodiment, music is output as a warning sound for the driving speed based on the vehicle speed detected as described above. In addition, every time the vehicle speed increases at a predetermined stage, the music of different contents (musical tone) is output as audio.
For example, in the third embodiment as well, in the same way as in the first embodiment, a music data set for four music data A, B, C, and D is stored in the warning music data storage unit 32. It is assumed that the detected speed Spd (km / h), which is the value of the detected vehicle speed, is stored.
a> Spd
a ≦ Spd <b
b ≦ Spd <c
c ≦ Spd <d
d ≦ Spd
It is divided into five stages. Here, the speed represented by a (km / h) is set as the lower limit of the speed at which a warning is required.
When the detected speed Spd actually obtained is a> Spd, the music data for warning is not particularly reproduced and output, but when a ≦ Spd <b, the music data A is reproduced repeatedly. To be. When b ≦ Spd <c, the music data B is repeatedly reproduced, and when c ≦ Spd <d, the music data C is repeatedly reproduced. Further, when d ≦ Spd, the music data D is repeatedly reproduced. Also, once the state of Spd ≧ a returns to a> Spd, the music data A is played back so that the playback ends and the playback ends.

Further, in the first embodiment, attention is paid to approaching an obstacle by changing the music data A, B, C, and D in order of increasing tension and tension. In this third embodiment, the music data A, B, C, and D have a melody that is slow and calm, for example. In the order of data A, B, C, and D, the tone changes so that the degree of calmness increases. That is, as the driving speed increases, the audio content of the music as a warning sound is changed to a more calm music.
Listening to songs with a tempo that is faster than a certain level while driving may cause a delay in the driver's risk avoidance operation due to physiological changes such as faster heart palpitations or increased blood pressure. It is said that the degree of danger increases and the safety increases on the contrary when listening to a slow-tempo calm music. Therefore, as a third embodiment, as described above, as the speed increases, the tune of the music that is a warning sound becomes more calm, and the driver can drive It encourages us to slow down.

  A procedure example executed by the control unit 35 for the speed warning operation as the third embodiment is shown in the flowchart of FIG. In this figure as well, the description of the procedure content that is the same as or similar to that in FIG. 4 corresponding to the first embodiment is omitted.

In this case, as a premise, when the warning system shown in FIG. 7 is activated, the control unit 35 of the car navigation device 3 is set at regular intervals based on the speed information taken from the speed sensor 39. In addition, the value of the detection speed Spd described above is acquired.
In step S301 in FIG. 8, it is determined whether or not the value of the detected speed Spd (km / h) obtained as described above is equal to or more than a kilometer per hour (a ≦ Spd). It is said. Here, assuming that the detected speed Spd is less than a kilometer per hour (a> Spd), and if a negative determination result is obtained, the routine shown in this figure is once ended at the next appropriate timing. The process returns to step S301. On the other hand, if a positive determination result is obtained in step S301 because a ≦ Spd, the process proceeds to step S302 and subsequent steps.

  In step S302, the music data A is selected as a processing target from the music data sets (music data A, B, C, D) stored in the warning music data storage unit 22 illustrated in FIG. The control process related to the audio reproduction is executed in the same manner as step S102 described with reference to FIG.

Next, depending on step S303, the value indicated by the current detection speed Spd is determined.
As a determination result in step S303, first, for example, when it is determined that a ≦ Spd <b, the process returns to step S302 to resume or continue the reproduction output of the music data A.
If the determination result that b ≦ Spd <c is obtained in step S303, the process proceeds to step S304, and control for starting reproduction or continuous reproduction (repeat reproduction) for the music data B is performed. Execute.

  If a determination result that c ≦ Spd <d is obtained in step S303, the process proceeds to step S305, and control for starting reproduction or continuous reproduction (repeat reproduction) for the music data C is performed. Execute.

If it is determined in step S303 that d ≦ Spd, the process proceeds to step S306. For example, in FIG. 4, step S106 corresponding to step S306 is a procedure for executing the reproduction of the music data D only once in consideration of the fact that the automobile stops. On the other hand, when the process reaches step S306, it means that the vehicle is continuously traveling at a speed equal to or higher than a certain level, which is the highest warning level. Therefore, also in step S306, in the same manner as in steps S304 and S305, control for starting playback or continuous playback (repeat playback) of the music data D is executed.
And after performing the procedure of said step S304, S305, S306, it is made to return to step S303.

  When the detection speed Spd returns from the state where a ≦ Spd to the state where a> Spd, the process proceeds from step S303 to step S307. In step S307, in accordance with step S107 of FIG. 4, a control process for ending the reproduction output of the music data A so as to fade out is executed.

  As a modification of the third embodiment, for example, instead of changing the music as the warning sound according to the speed, the music as the warning sound according to the acceleration detected by the acceleration sensor 38, for example. A configuration that changes is also conceivable. The fact that the acceleration is increasing means that the speed is changing so as to increase, so that the warning corresponding to the acceleration can also contribute to the safe driving as in the third embodiment.

For the embodiments described so far, for example, the following combinations and changes can be considered.
For example, with respect to the speed warning according to the third embodiment, as in the second embodiment, the data of a plurality of music section parts obtained by dividing one piece of music data for warning is determined according to the detection speed Spd. Can be selected and played back.
Further, for example, in the warning system corresponding to the first and second embodiments shown in FIG. 1, the control unit 25 can detect the own vehicle speed and acquire the detected speed Spd by providing the speed sensor 39 and the like. A configuration is added, or conversely, an obstacle distance sensor 1 is provided for the warning system (car navigation device 3) corresponding to the third embodiment shown in FIG. By configuring so that Dis can be acquired, the obstacle warning operation as the first or second embodiment and the speed warning operation as the third embodiment can be executed by one warning system. Is possible. In this case, in the warning music data storage unit 22 (32), different music data sets or warning music data are prepared and stored for the obstacle warning operation and the speed warning operation. It's okay. Also, a plurality of sets of music data sets used for the same obstacle warning operation are prepared and stored in the warning music data storage unit 22 (32). For example, user setting, driving time zone, driving area, etc. Depending on the determination result, an appropriate music data set may be selected and used.
Further, in each of the above embodiments, a warning system is configured by including a car audio device or a car navigation device that is a vehicle-mounted device. Regardless of the on-vehicle equipment, it can also be realized as a function installed in an automobile, for example.
Further, when the warning system is provided with a display function like the car navigation device 3 of FIG. 7, some auxiliary images related to the warning function are displayed when the music is played back as a warning. It may be.

In each of the above embodiments, the sound source of the music to be output as the warning sound is audio data of a predetermined format, that is, an audio signal, and the audio signal is reproduced to output a sound. However, as a method for playing music, for example, MIDI (Musical Instrument Digital Interface) is used, and sound source data in which timbre is set and sound generation control data for controlling the sound generation timing of this sound source data are prepared. Then, it is known that a musical piece is played as a result by controlling the timing of sound generation (sound output) of sound source data in accordance with the sound generation procedure described in the sound generation control data. Also in the present embodiment, the music data entity may be constituted by such sound source data and sound generation control data.
Further, in each of the embodiments so far, the configuration of the sound reproducing device as the invention of the present application is applied to a warning system such as an automobile, but according to the state change caused by the driving operation obtained by the present application. The operation of changing and outputting the music contents can be applied to, for example, an entertainment purpose in addition to a safety warning.

It is a figure which shows the structural example of the warning system corresponding to 1st or 2nd embodiment of this invention. It is a figure which shows typically the example of the obstacle warning operation | movement as 1st Embodiment. It is a figure which shows the example of the content of the music data memorize | stored in the music data storage part for warning corresponding to 1st Embodiment. It is a flowchart which shows the example of a process sequence for implement | achieving the obstacle warning operation | movement as 1st Embodiment. It is a figure which shows the example of the content of the music data for warning used in 2nd Embodiment. It is a flowchart which shows the example of a process sequence for implement | achieving the obstacle warning operation | movement as 2nd Embodiment. It is a figure which shows the structural example of the warning system corresponding to 3rd Embodiment. It is a flowchart which shows the example of a process sequence for implement | achieving the speed warning operation | movement as 3rd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Obstacle distance sensor, 2 Car audio apparatus, 3 Car navigation apparatus, 11-1 to 11-n sensor, 12 Detection circuit, 21 Sound source part, 22 * 32 Warning music data storage part, 23 * 33 Sound output processing part 24, 34 Speaker, 25, 35 Control unit, 30 Display unit, 31 Map data storage unit, 37 GPS reception unit, 38 Acceleration sensor, 39 Speed sensor

Claims (8)

Music data holding means for holding a plurality of music data each having different reproduction contents;
Music reproduction output means for reproducing and outputting the music data held in the music data holding means as sound so that the driver of the mobile body can listen;
Detection information input means for inputting detection information obtained by detecting a predetermined state that can be changed according to the driving of the moving body to be performed by the driver;
According to the detection information input by the detection information input means, one music data is selected from a plurality of music data held in the music data holding means, and the selected music data is selected as the music reproduction output means. Music reproduction control means adapted to reproduce and output in a predetermined manner by:
An audio reproducing apparatus comprising: The detection information input means is configured to input detection information obtained by detecting a distance from the moving body as the predetermined state to an obstacle supposed to be therearound,
The sound reproducing apparatus according to claim 1, wherein The detection information input means is configured to input detection information obtained by detecting the speed of the moving body as the predetermined state.
The sound reproducing apparatus according to claim 1, wherein Music data holding means for holding one piece of music data formed so that a plurality of music section parts each having different reproduction contents are connected in a predetermined order;
Music reproduction output means for reproducing and outputting the music data held in the music data holding means as sound so that the driver of the mobile body can listen;
Detection information input means for inputting detection information obtained by detecting a predetermined state that can be changed according to the driving of the moving body to be performed by the driver;
According to the detection information input by the detection information input means, one music section part is selected from the music data held in the music data holding means, and it corresponds to the selected music section part. Music reproduction control means adapted to reproduce and output the music data portion in a predetermined manner by the music reproduction output means;
An audio reproducing apparatus comprising: Music reproduction output procedure for reproducing and outputting the music data held in music data holding means for holding a plurality of music data each having different reproduction contents so as to be heard by the driver of the mobile body When,
A detection information input procedure for inputting detection information obtained by detecting a predetermined state that can be changed according to the driving of the moving body to be performed by the driver;
According to the detection information input by the detection information input procedure, one piece of music data is selected from a plurality of pieces of music data held in the music data holding means, and the selected music piece data is used as the music reproduction output procedure. A music reproduction control procedure adapted to reproduce and output in a predetermined manner,
A sound reproduction method characterized by executing The music data held in the music data holding means for holding one piece of music data formed so that a plurality of music section parts each having different reproduction contents are connected in a predetermined order, Music playback output procedure for playback and output as audio so that the driver of the mobile body can listen,
A detection information input procedure for inputting detection information obtained by detecting a predetermined state that can be changed according to the driving of the moving body to be performed by the driver;
According to the detection information input by the detection information input procedure, one music section part is selected from the music data held in the music data holding means, and it corresponds to the selected music section part. A music reproduction control procedure adapted to reproduce and output the music data portion in a predetermined manner by the music reproduction output procedure;
An audio playback method comprising: Music reproduction output procedure for reproducing and outputting the music data held in music data holding means for holding a plurality of music data each having different reproduction contents so as to be heard by the driver of the mobile body When,
A detection information input procedure for inputting detection information obtained by detecting a predetermined state that can be changed according to the driving of the moving body to be performed by the driver;
According to the detection information input by the detection information input procedure, one piece of music data is selected from a plurality of pieces of music data held in the music data holding means, and the selected music piece data is used as the music reproduction output procedure. A music reproduction control procedure adapted to reproduce and output in a predetermined manner,
Is a program that causes the audio playback device to execute the program. The music data held in the music data holding means for holding one piece of music data formed so that a plurality of music section parts each having different reproduction contents are connected in a predetermined order, Music playback output procedure for playback and output as audio so that the driver of the mobile body can listen,
A detection information input procedure for inputting detection information obtained by detecting a predetermined state that can be changed according to the driving of the moving body to be performed by the driver;
According to the detection information input by the detection information input procedure, one music section part is selected from the music data held in the music data holding means, and it corresponds to the selected music section part. A music reproduction control procedure adapted to reproduce and output the music data portion in a predetermined manner by the music reproduction output procedure;
Is a program that causes the audio playback device to execute the program.

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