JP2006311070A - Surround-sound system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a surround-sound system realizing a listening position corresponding to a plurality of directions as the arrangements and wirings of a plurality of loudspeakers in the interior of a room are left as they are. <P>SOLUTION: The surround-sound system has an acoustic correction means 10 carrying out an acoustic correction to a sound signal supplied from a source input and generating a plurality of channel signals FL, FR, RL, RR, CENT and SW and an amplifying means 30 amplifying output signals FL, FR, RL, RR, CENT and SW from the acoustic correction means 10. A signal changeover means 20 changing over and outputting a plurality of the channel signals FL, FR, RL, RR, CENT and SW is fitted at the front stage of the amplifying means 30. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a surround system including an acoustic correction unit that performs acoustic correction, and more particularly to a surround system that realizes listening positions corresponding to a plurality of directions without changing the arrangement of a plurality of speakers in a room.

  In general, the surround system includes an audio device, a video device, a plurality of speakers, various screens, a television monitor, and the like.

  An example of a conventional audio device is disclosed in Patent Document 1, and this block diagram is shown in FIG.

  The apparatus shown in FIG. 4 is provided in the remote controller 1 that emits an optical signal in response to a predetermined operation command and the main body apparatus 80, and transfers setting data for each speaker related to acoustic correction included in the optical signal to the DSP 2. CPU82 which performs (refer patent document 1).

In this case, when an optical signal from the remote controller 1 is received, the CPU 82 of the main unit 80 transfers setting data of a predetermined listening position to the DSP 2 so that data for each speaker is set.
JP-A-6-335100

  By the way, depending on the room in which the surround system is installed, there is a restriction that not all installed televisions, screens, and the like can be installed in the same direction.

  Under such restrictions, when the conventional surround system is introduced, the predetermined speaker arrangement in the room and the arrangement of the speaker desired by the viewer are different, so that the sound image localization is unnatural and the viewer feels uncomfortable. There was a problem.

  Changing the arrangement of the speakers once installed is complicated, and changing the wiring of a plurality of speakers in the room is complicated.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a surround system that realizes listening positions corresponding to a plurality of directions without changing the arrangement and wiring of a plurality of speakers in a room. The purpose is to provide.

  The surround system according to claim 1 includes an acoustic correction unit that performs acoustic correction on an audio signal supplied from a source input to generate a plurality of channel signals, and an amplification unit that amplifies an output signal of the acoustic correction unit. The surround system is characterized in that signal switching means for switching and outputting the plurality of channel signals is provided before the amplification means.

  The surround system according to claim 2 is characterized in that, in the surround system according to claim 1, the sound correcting means and the signal switching means are configured by the same DSP.

  In these, the signal switching means is provided in front of the amplifying means, so that the acoustic correcting means generates a plurality of output signals, the signal switching means switches to the amplifying means, and the amplifying means outputs the amplified sound. By supplying to a plurality of speakers, a listening position corresponding to a plurality of directions can be realized.

  Here, the sound correcting means performs sound correction on the sound signal supplied from the source input, and generates sound signals related to a plurality of listening positions from the source input. For example, a DSP can be mentioned.

  The signal switching means constitutes a matrix for switching the output destinations of the plurality of audio signals of the acoustic correction means. This can be composed of various switches, for example. Examples of the various switches include semiconductor switches, relay switches, and DSPs that are substantially equivalent to circuits having switches at matrix intersections.

  When the signal switching means is constituted by a DSP, the acoustic correction means and the signal switching means can be constituted by one DSP.

  According to the surround system of the first aspect of the invention, acoustic correction means for performing acoustic correction on the audio signal supplied from the source input to generate a plurality of channel signals, and amplification means for amplifying the output signal of the acoustic correction means And a signal switching means for switching and outputting the plurality of channel signals in the preceding stage of the amplification means, so that the plurality of output signals can be switched and output to each speaker, There is an effect that listening positions corresponding to a plurality of directions can be realized without changing the arrangement and wiring of a plurality of speakers in the room.

  According to the surround system of the invention of claim 2, in addition to the effect produced by the surround system of claim 1, the sound correction means and the signal switching means are constituted by the same DSP, so that a hardware circuit is constituted. There is an effect that the number of parts can be reduced without taking up the board area as compared with the case.

The best mode for carrying out the present invention will be described below with reference to the drawings. However, the present invention is not limited to the following examples as long as the gist of the present invention is not exceeded. 1 to 3 show an embodiment of a surround system used in a hotel room as an example.
Example 1
FIG. 1 is an overall layout showing an embodiment of the surround system of the present invention. FIG. 2 is a diagram conceptually showing a control system of a main part of the surround system.

  As shown in FIG. 1, a television 1, a projector screen 2, a plurality of speakers 41 to 47, and the like are installed in a hotel room 101, and a surround system 100 is configured with them.

  The surround system 100 is used, for example, in a room used by an unspecified user such as a hotel to reproduce a realistic sound field space similar to that experienced in a movie theater in a private room.

  As shown in FIG. 2, the configuration includes at least an acoustic correction unit 10, a signal switching unit 20, an amplification unit 30, a control unit 50, and a remote controller 60. Although not shown in the figure, other processing related to video signal processing is included. Thereby, the setting screen of the listening position during operation of the remote controller 60 is displayed on the television 1 or the projector screen 2.

  The sound correction means 10 performs sound correction on the signal input to the source, and has a so-called DSP: digital signal processor, which is a known technique. Control means 50 is connected to the DSP via a control signal.

  The acoustic correction unit 10 generates multi-channel surround sound (hereinafter simply referred to as “sound”) FL, FR, RL, RR, CENT, SW from the source input under the control of the control unit 50. It is. Similarly, sound equalization can be adjusted.

  Examples of the source include arbitrary signals from the Internet, DVD, LD, cable TV, and the like. These signals are selected as one of the signals before the acoustic correction unit 10 and input to the acoustic correction unit 10.

  The DSP peripheral circuit of the sound correcting means 10 has an electronic volume adjusting circuit and a tone control circuit (not shown), and the control means 50 is also connected to them through a control signal.

  When the source is input, the DSP generates sounds FL, FR, RL, RR, CENT, SW under the control of the control means 50, and these 5.1ch signals are adjusted to a predetermined volume and tone. , Output to the signal switching means 20.

  The signal switching means 20 is a matrix control circuit that is configured in a matrix form having row elements and column elements, and includes a plurality of semiconductor switches that are known techniques.

  Each of the semiconductor switches is connected to each signal of sound FL, FR, FR, RR, CENT, SW, each signal connected to the amplifying means 30, and a control signal from the control unit 50 as a control line. Yes.

  When the output of the acoustic correction means 10 is input to the signal switching means 20, the signal switching means 20 performs switching under the control of the control means 50, and the sound FL, FR, FR, RR, CENT, The output destination of the SW is switched and output to the amplification means 30. As a result, a plurality of speakers are switched without changing the wiring.

  The amplification means 30 is a circuit including a plurality of known amplifier ICs, and is provided for each surround signal line. The amplifying means 30 amplifies the sounds FL, FR, FR, RR, CENT, and SW for each signal, and outputs the amplified signal to each speaker through a terminal at the subsequent stage.

  On the other hand, in the room 101, the bed 4 is arranged substantially at the center, the head side of the bed 4 is arranged on one wall side of the room 101, and the leg side faces the center. The projector screen 2 is arranged on the other wall side of the room 101 on the direction extension line from the head side to the leg side.

  When the projector screen 2 is viewed from the bed 4, the sofa 3 is disposed near the wall on the left hand side, the television 1 is disposed near the wall on the opposite side (right hand) across the bed 4, and the projector screen 2 from the bed 4. The direction line when viewing the TV and the direction line when viewing the TV from the sofa are set to be orthogonal.

  The plurality of speakers 41 to 47 are known speakers having a wide and flat characteristic. In these arrangements, the speakers 41 and 42 are provided on both sides of the television 1 with respect to the direction line in which the television 1 is viewed from the sofa 3. Here, the speakers 41 and 42 function as front speakers.

  The speakers 43 and 44 are provided on both sides of the sofa 3. Here, it functions as a rear speaker. The speaker 45 is provided at the rear of the television and functions as a center speaker.

  The speaker 46 is provided in the vicinity of the projector screen 2 and is in an operation OFF state in which sound is not output with this setting. The speaker 47 is provided in the vicinity of the bed 4 and functions as a super woofer.

  As shown in FIG. 2, the control system of the surround system 100 is configured such that the control unit 50 is electrically connected to the acoustic correction unit 10 and the signal switching unit 20 via a control signal and can be controlled by the control unit 50. It is.

  The control means 50 has a circuit configuration including a known central processing unit (CPU), and by executing a computer program, setting and changing listening positions corresponding to a plurality of directions, signal switching to each speaker, volume Make adjustments, tone adjustments, equalizing adjustments, etc.

  A plurality of remote control light receiving parts 51 and 52 (see FIG. 2) provided at a plurality of locations in the room 101 are connected to the control means 50. Thus, when the user U operates the remote controller 60, transmission in a plurality of directions can be received.

  The remote control 60 is a known remote control device, and emits an optical signal in response to a predetermined operation command. It includes buttons for operations such as setting listening positions in a plurality of directions and equalizing adjustment.

  Next, a method of using the surround system 100 will be described with reference to FIG. FIG. 3 is a diagram illustrating a state in which listening positions corresponding to a plurality of directions are realized by the control of the control unit 50 while the arrangement and wiring of the plurality of speakers 41 to 47 in the room 101 illustrated in FIG.

  As a control method for changing the listening position, when the user U operates the remote controller 60, the television 1 and the projector screen 2 are selected and switched, and the speaker is switched in synchronization therewith. In addition, automatic setting and individual setting for each speaker are also performed.

  In the control method, first, when an optical signal is emitted in response to an operation of the remote controller 60, the control means 50 receives the optical signal via the remote controller light receiving unit 52.

  The control unit 50 recognizes setting data related to acoustic correction included in the optical signal, and sends a control signal corresponding to the setting data to the acoustic correction unit 10 and the signal switching unit 20.

  The sound correcting means 10 that has received the control signal generates sounds FL, FR, RL, RR, CENT, and SW corresponding to the control signal, adjusts them to a predetermined volume and tone by the various circuits, and switches the signal switching means 20. Output to.

  The signal switching means 20 that has received the control signal performs the following switching processing in synchronism based on the control signal.

  That is, the front left signal FL is switched from the speaker 41 to the speaker 43 among the surround FL, FR, RL, RR, CENT, and SW. The front right signal FR is switched from the speaker 42 to the speaker 41.

  The rear left signal RL is switched from the speaker 43 to the speaker 44. The rear right signal RR is switched from the speaker 44 to the speaker 42. The center signal CENT is switched from the speaker 45 to the speaker 46.

  Note that the super woofer signal SW remains unchanged from the speaker 47. In this case, the speaker 45 is in an OFF state where it does not operate.

  According to the surround system 100 described above, the sound correcting means 10 and the amplifying means 30 are provided, and the signal switching means 20 is provided in the preceding stage of the amplifying means 30, so that the sounds FL, FR, RL, RR before amplification are provided. , CENT, SW can be switched and output to the amplifying means 30, and as a result, the output signals to the speakers 41 to 47 can be switched and output. A listening position corresponding to the direction can be realized.

  Further, since the output signal before amplification can be switched and output to each of the speakers 41 to 47, there is no need to provide a second switching means such as a switch for switching and outputting each audio signal amplified by the amplification means 30. The score can be reduced.

  Furthermore, it is possible to effectively utilize the existing speakers 41 to 47 by using a system in which the arrangement of the speakers 41 to 47 is assumed in advance. The control unit 50 controls the signal switching unit 20 to eliminate the complexity of setting the acoustic correction.

In addition to switching the speakers, the user U can also process or adjust the overall frequency characteristics of the audio signal, etc. by operating the remote control 60, correcting the characteristics of the room or the speakers, emphasizing the high frequency of the sound effects or vocals Etc. can be used.
(Example 2)
Next, another example of the surround system according to the embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected to the component same as the component in the surround system of FIGS. 1-3, and the description is abbreviate | omitted.

  In this surround system 100, the sound correcting means 10 and the signal switching means 20 are configured by the same DSP. That is, the function of the signal switching means 20 is incorporated into the DSP.

  According to this, since the sound correcting means 10 and the signal switching means 20 are configured by the same DSP, it is possible to reduce the number of components without taking up a board area as compared with the case of configuring a hardware circuit. Space can be saved.

  The best mode of the surround system 100 of the present invention has been described based on the embodiments. However, the present invention is not limited to the configurations described in the above embodiments, and may be appropriately selected without departing from the spirit thereof. Its configuration can be changed.

  For example, the surround system only needs to be used to reproduce a realistic sound field space similar to that experienced in a movie theater. In addition to the 5.1ch signal sound described in the embodiment, For example, 6.1 ch may be used, and 7.1 ch can be used for other speakers.

  In the above embodiment, the case of changing the listening position in two directions has been described. However, the present invention is not limited to this, and listening positions corresponding to a plurality of other directions can be realized in the same manner.

  Further, as a modification of the remote controller 60, a configuration using an operation switch or the like may be used.

  The surround system of the present invention is used in all industrial fields where it is required to reproduce a sound field space full of a sense of presence similar to that experienced in a movie theater in a room used by an unspecified user such as a hotel. Can do.

1 is an overall layout diagram showing an embodiment of a surround system of the present invention. It is a figure which shows notionally the control system of the principal part of a surround system. It is a figure which shows the state which changed the listening position. It is a block diagram which shows the conventional audio apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Sound correction means 20 Signal switching means 30 Amplification means 50 Control means 60 Remote control 100 Audio apparatus

Claims (2)

A surround system comprising: an acoustic correction unit that performs acoustic correction on an audio signal supplied from a source input to generate a plurality of channel signals; and an amplification unit that amplifies an output signal of the acoustic correction unit,
A surround system comprising a signal switching means for switching and outputting the plurality of channel signals before the amplifying means.   2. The surround system according to claim 1, wherein the sound correcting means and the signal switching means are constituted by the same DSP.

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