JP2006033120A - Television broadcast receiving system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a "television broadcast receiving system" capable of viewing and listening a part, which was incapable of being viewed and listened by a mobile broadcast receiver, efficiently later. <P>SOLUTION: When viewing and listening of a program is started by a mobile broadcast receiver, data for specifying the program is transmitted to a video recorder where the video image of a program received by the mobile broadcast receiver is recorded in a video data recording section. When the program under viewing and listening by the mobile broadcast receiver becomes impossible to be viewed and listened due to radio wave interference, reception trouble information is written in the reception trouble information recording section of the mobile broadcast receiver. The reception trouble information is transmitted from the mobile broadcast receiver to the video recorder where video signals corresponding to the reception trouble information is reproduced. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a receiving system for enjoying a television (TV) broadcasting service, and is particularly suitable for a system including a mobile TV receiving apparatus capable of receiving digital TV broadcasting and a home server installed at home or the like. The present invention relates to a television broadcast receiving system.

  In recent years, mobile TV receivers such as an in-vehicle TV, a portable TV, or a mobile phone with a built-in TV are widely used, and it is possible to watch a TV broadcast on the go or a TV broadcast while moving. These mobile TV devices are currently mainly used for analog broadcasting, but will be replaced with mobile TV receiving devices for digital TV broadcasting in the future as the broadcasting is digitized. .

  By the way, in the case of analog TV broadcasting, even if the radio wave reception situation deteriorates to some extent, the video and audio of the program being viewed on the mobile TV receiver are rarely interrupted, and even if noise is mixed, It is often possible to understand the broadcast content. On the other hand, in the case of digital TV broadcasting, if the radio wave reception situation deteriorates, the video and audio are completely interrupted, so it is not possible to grasp the broadcast contents during that time.

2. Description of the Related Art In recent years, a system has been realized that can make a TV program recording reservation from a remote location via a mobile phone or the like to a home recording device (hard disk video recorder or the like). Japanese Patent Laid-Open No. 2002-247658 discloses a portable terminal that makes a control reservation for a device to be controlled while away from home and determines whether or not to execute the control reservation depending on whether the user has returned home. Is disclosed. Using such a system, it is also conceivable to record a TV program viewed on the go with a recording device at home and to watch the part that could not be viewed at home.
JP 2002-247658 A

  However, even if a recording reservation is made to the recording device at home when the user is away from home, when the part that cannot be viewed at home is viewed at home, the user himself / herself has to search for the part that cannot be viewed by the user.

  The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a television broadcast receiving system capable of efficiently viewing later a portion that could not be viewed by a mobile TV receiver.

  The above-described problem is a television broadcast receiving system including a mobile broadcast receiving device and a recording device that can communicate with each other, and the mobile broadcast receiving device receives a television broadcast wave and outputs a broadcast signal. A first tuner unit, a first signal processing unit that processes a broadcast signal output from the first tuner unit and outputs a video signal, the first tuner unit, and the first signal A first control unit that controls the processing unit; a reception failure information recording unit in which reception failure information is written by the first control unit when a reception failure occurs; and the first control unit that is controlled by the first control unit. A first communication unit that communicates with the recording device, and the recording device receives a TV broadcast wave and outputs a broadcast signal; and the second tuner unit outputs the broadcast signal. Broadcast signal processing A second signal processing unit that outputs a video signal, a second control unit that controls the second tuner unit and the second signal processing unit, and a second control unit that is controlled by the second control unit. A recording data recording unit that records a video signal output from the two signal processing units, and a second communication unit that is controlled by the second control unit to communicate with the mobile broadcast receiving device, The second control unit of the recording device acquires the reception failure information from the mobile broadcast reception device, and reads a video signal written in the recording data recording unit based on the reception failure information. The problem is solved by the featured television broadcast receiving system.

  In the present invention, for example, when viewing of a program is started by a mobile broadcast receiving device, data specifying the program is sent to the recording device, and the video signal of the program received by the mobile broadcast receiving device in the recording device Is recorded in the recording data recording unit. In addition, if the mobile broadcast receiving device becomes unable to view the television broadcast due to radio wave interference while watching the television broadcast, the mobile broadcast receiving device control unit (first control unit) receives the reception failure information recording unit. Fault information is written.

  This reception failure information is transmitted from the mobile broadcast reception device to the recording device, and the recording device reproduces the video signal corresponding to the reception failure information. For example, a portion of the video that can be viewed by the mobile broadcast receiver is played back at high speed, and a portion of the video where the reception failure has occurred is played back at a constant speed. Accordingly, the user can efficiently view the portion that could not be viewed on the mobile broadcast receiver.

  Embodiments of the present invention will be described below with reference to the drawings.

(Schematic configuration of TV broadcast receiving system)
As shown in FIG. 1, a TV broadcast receiving system according to an embodiment of the present invention includes a mobile TV receiver 1 that is mounted on a vehicle and receives a terrestrial digital TV broadcast output from a broadcast tower 5 and a home. And a home server 2 that receives the terrestrial digital TV broadcast that is installed and output from the broadcast tower 5. The mobile TV receiver 1 and the home server 2 are communicatively connected by inter-terminal communication so that data can be transmitted and received.

(Configuration of mobile TV receiver)
FIG. 2 is a block diagram showing a configuration of the mobile TV receiver 1. As shown in FIG. 2, the mobile TV receiver 1 includes a control unit 21, an operation unit 22, a reception failure information recording unit 23, a tuner unit 24, and an OFDM (Orthogonal Frequency Division Multiplexing) demodulation unit 25. , An MPEG-TS (Transport Stream) demodulator 26, D / A (digital / analog) converters 27 and 28, a drive circuit 29, an amplifier 30, and a communication device 31. The control unit 21, reception failure information recording unit 23, tuner unit 24, OFDM demodulation unit 25, and MPEG-TS demodulation unit 26 are all connected to a control bus, and signals are transmitted via this control bus. The control unit 21 is connected to a communication device 31, and transmits and receives signals to and from the home server 2 via the communication device 31.

  The tuner unit 24 sets a reception channel based on a signal from the control unit 21, and outputs the received broadcast signal to the OFDM demodulation unit 25. In addition, the tuner unit 24 outputs a signal indicating the reception state (reception strength) to the control unit 21.

  The OFDM demodulator 25 receives the broadcast signal from the tuner unit 24, performs OFDM demodulation, and extracts an MPEG-TS signal. The MPEG-TS demodulator 26 demodulates the MPEG-TS signal output from the OFDM demodulator 25, separates it into a digital video signal VS and a digital audio signal AS, and outputs them.

  The D / A converter 27 receives the digital video signal from the MPEG-TS demodulator 26, converts it into an analog video signal, and outputs it. The drive circuit 29 inputs an analog video signal from the D / A conversion unit 27 and drives a display device (not shown) such as a liquid crystal panel. Thereby, an image is displayed on the display device.

  On the other hand, the D / A converter 28 receives the digital audio signal from the MPEG-TS demodulator 26, converts it into an analog audio signal, and outputs it. The amplifier 30 amplifies the analog audio signal output from the D / A converter 28 and supplies it to a speaker (not shown). Thereby, sound or music is output from the speaker.

  The operation unit 22 is provided with operation buttons and the like necessary for operating the mobile TV receiver 1. The control unit 21 sets a channel to be received by the tuner unit 24 according to a signal from the operation unit 22, and controls the reception failure information recording unit 23, the OFDM demodulation unit 25, the MPEG-TS demodulation unit 26 and the communication device 31. To do. Further, the control unit 21 determines whether or not the reception state is good based on the signal indicating the reception state input from the tuner unit 24. And when it is determined that the reception state is bad, for example, when the reception intensity of the radio wave is lower than a predetermined value, the reception failure including the data specifying the program received so far and the time when the reception state becomes bad Information (reception failure log) is created and recorded in the reception failure information recording unit 23. In the present embodiment, it is assumed that the time when the reception state deteriorates is acquired from a timer built in the control unit 21.

  The reception failure information recording unit 23 is composed of a semiconductor memory, and holds reception failure information written by the control unit 21.

(Home server configuration)
FIG. 3 is a block diagram showing the configuration of the home server 2. As shown in FIG. 3, the home server 2 includes a control unit 41, an operation unit 42, a recorded data recording unit 43, a tuner unit 44, an OFDM demodulation unit 45, an MPEG-TS (Transport Stream) demodulation unit 46, a D / A The converters 47 and 48, the drive circuit 49, the amplifier 50, and the communication device 51 are configured. The control unit 41, the recorded data recording unit 43, the tuner unit 44, the OFDM demodulation unit 45, and the MPEG-TS demodulation unit 46 are all connected to the control bus, and signals are transmitted through this control bus. The control unit 41 is connected to a communication device 51, and transmits / receives a signal to / from the mobile TV receiver 1 via the communication device 51.

  The tuner unit 44 sets a reception channel based on a signal from the control unit 41, and outputs the received broadcast signal to the OFDM demodulation unit 45. The OFDM demodulator 45 receives the broadcast signal from the tuner unit 44, performs OFDM demodulation, and extracts an MPEG-TS signal. The MPEG-TS demodulator 46 demodulates the MPEG-TS signal output from the OFDM demodulator 45, separates it into a digital video signal VS and a digital audio signal AS, and outputs them.

  The D / A converter 47 receives the digital video signal from the MPEG-TS demodulator 46, converts it into an analog video signal, and outputs it. The drive circuit 49 inputs an analog video signal from the D / A converter 47 and drives a display device (not shown) such as a liquid crystal panel or a CRT (Cathode-Ray Tube). Thereby, an image is displayed on the display device.

  On the other hand, the D / A converter 48 receives the digital audio signal from the MPEG-TS demodulator 46, converts it into an analog audio signal, and outputs it. The amplifier 50 amplifies the analog audio signal output from the D / A converter 48 and supplies it to a speaker (not shown). Thereby, sound or music is output from the speaker.

  The operation unit 42 is provided with operation buttons and the like necessary for operating the home server 2. The control unit 41 sets a channel received by the tuner unit 44 according to a signal from the operation unit 42 or a signal sent from the mobile TV receiver 1 via the communication device 51, or a recording data recording unit 43. The OFDM demodulator 45, the MPEG-TS demodulator 46, and the communication device 51 are controlled.

  The recorded data recording unit 43 is configured by a large-capacity recording medium (for example, a hard disk (HDD)). The recorded data recording unit 43 inputs an MPEG-TS signal via the MPEG-TS demodulation unit 46 in accordance with a signal from the control unit 41 and records it on a recording medium. In this case, the control unit 41 obtains the recording start time from the timer built in the control unit 41 and records it in the recorded data recording unit 43 together with the MPEG-TS signal.

In the TV broadcast receiving system as described above, the mobile TV receiver 1 is the “mobile broadcast receiver”, the home server 2 is the “recording device”, the tuner unit 24 is the “first tuner unit”, and the OFDM The demodulation unit 25 is a “first signal processing unit”, the reception failure information recording unit 23 is a “reception failure information recording unit”, the control unit 21 is a “first control unit”, and the communication device 31 is a “first control unit”. The communication unit ”, the tuner unit 44 is the“ second tuner unit ”, the OFDM demodulator unit 45 is the“ second signal processing unit ”, the recording data recording unit 43 is the“ recording data recording unit ”, and the control unit 41 corresponds to a “second control unit”, and the communication device 51 corresponds to a “second communication unit”.
(basic action)
FIG. 4 is a flowchart showing the operation of the TV broadcast receiving system according to the embodiment of the present invention.

  First, in step S11, it is assumed that viewing of the program A is started by the mobile TV receiver 1. That is, when the user operates the operation unit 22 of the mobile TV receiving device 1 to set a desired channel, the control unit 21 controls the tuner unit 24 to start receiving the TV program A of the set channel. . At the same time, the control unit 21 notifies the home server 2 that the mobile TV receiver 1 has started receiving the program A via the communication device 31.

  When the mobile TV receiver 1 is notified of the start of reception of the program A in step S21, the control unit 41 of the home server 2 receives a tuner unit 44, an OFDM demodulation unit 45, an MPEG-TS demodulation unit 46, and a recorded data recording unit. 43, the reception of the same program A as received by the mobile TV receiver 1 is started, and the recording of the program A in the recorded data recording unit 43 is started. At this time, the control unit 41 records the recording start time of the program A in the recording data recording unit 43.

  Next, in step S12, it is assumed that the reception intensity becomes lower than a predetermined value due to, for example, a vehicle on which the mobile TV receiving device 1 is mounted behind the building, and the program A cannot be received. In this case, the control unit 21 of the mobile TV receiving apparatus 1 collects the time X1 when the program A can no longer be received and the data indicating the program A as reception failure information (reception failure log), and receives the reception failure information recording unit 23. To record. After that, when the program A can be received again, data indicating how long (how many seconds) the reception of the program A was interrupted (or the time when the reception was resumed) is added to the reception failure information.

  Next, in step S13, the power supply (ACC: accessory power supply) of the mobile TV receiver 1 is turned off. Then, the control unit 21 collects the time X2 when the power is turned off and the data indicating the program A that has been viewed up to that time as reception failure information, and records the reception failure information in the reception failure information recording unit 23. Thereafter, when the power is turned on, the control unit 21 adds data (or time when reception is resumed) indicating how long the program A has been interrupted to the reception failure information.

  Next, in step S14, it is assumed that reception of the program A is interrupted because the user switches to another source (for example, a CD player) in the mobile TV receiver 1. Also in this case, the control unit 21 collects the time X3 at which the reception of the program A is interrupted and the data indicating the program A that has been viewed up to that time as reception failure information and records it in the reception failure information recording unit 23. To do. Thereafter, when the user switches the source and resumes viewing of the program A, the control unit 21 adds data (or the time when the reception is resumed) indicating how long the program A has been interrupted to the reception failure information. To do.

  Next, in step S15, it is assumed that the channel is switched by a user operation and viewing of the program B is started. Then, the control unit 21 of the mobile TV receiver 1 notifies the home server 2 via the communication device 31 that the reception of the program B is started by the mobile TV receiver 1.

  In the home server 2, when the start of viewing of the program B is notified from the mobile TV receiver 1 in step S22, the control unit 41 controls the tuner unit 44 to change the reception channel and start receiving the program B. At the same time, recording of the program B to the recording data recording unit 43 is started. At the same time, the recording start time of the program B is recorded in the recording data recording unit 43.

  In this way, the same program as that viewed on the mobile TV receiver 1 is recorded in the recording data recording unit 43 of the home server 2. Further, in the mobile TV receiving apparatus 1, when a program being viewed cannot be viewed for some reason, data indicating the program that has been received up to that point and the time when reception was interrupted are used as reception failure information. Record in the reception failure information recording unit 23.

  Note that when the reception of the program A is not resumed until the end time of the program A, data in a period during which the program A cannot be received is lost. When data indicating a period during which the program cannot be received is missing, it is assumed that the program cannot be received from the time when the program is interrupted until the time when the program ends.

  Steps S12 to S15 show an example in which viewing of a program is interrupted. If there is no corresponding cause, the corresponding step is skipped.

  Hereinafter, an operation when viewing a program recorded on the home server 2 will be described. However, the home server 2 can also play a recorded program from the beginning in the same way as a general recording device, but here, it efficiently uses the reception failure information recorded in the mobile TV receiver 1. Only the case of viewing will be described.

  In step S16, when the vehicle equipped with the mobile TV receiving device 1 returns to the vicinity of the home, the control unit 21 of the mobile TV receiving device 1 reads out the reception failure information from the reception failure information recording unit 23, and the communication device 31. The reception failure information is transmitted to the home server 2 via. When the home server 2 receives the reception failure information in step S23, the home server 2 proceeds to step S24. Then, when the user performs a predetermined operation, the portion that could not be received by the mobile TV receiver 1 based on the reception failure information is read from the recorded data recording unit 43 and output to the MPEG-TS demodulation unit 26.

  The MPEG-TS demodulator 46 demodulates the MPEG-TS signal output from the recorded data recording unit 43, separates it into a digital video signal VS and a digital audio signal AS, and outputs them. The digital video signal VS is converted into an analog video signal by the D / A converter 47 and sent to the drive circuit 49. On the other hand, the digital audio signal AS is converted into an analog audio signal by the D / A converter 48, amplified by the amplifier 50, and supplied to the speaker. In this way, video and sound are provided to the user.

  FIG. 5A is a diagram showing an example of a recording list recorded in the home server 2, and FIG. 5B is a diagram showing reception failure information recorded in the reception failure information recording unit 23 of the mobile TV receiver 1. It is a figure which shows an example. Using the information shown in FIGS. 5A and 5B, the portion that could not be viewed on the mobile TV receiver 1 is efficiently reproduced on the home server 2.

In the present embodiment, for example, the following patterns are prepared as reproduction patterns for efficiently reproducing recorded data recorded on the home server 2.
(1) A portion that has been viewed on the mobile TV receiving device 1 is reproduced at several times speed (for example, 2 to 4 times speed), and only a portion that cannot be viewed on the mobile TV receiving device 1 (and portions before and after that). Play at a constant speed.
(2) Only the parts that could not be viewed on the mobile TV receiver 1 (and the parts before and after) are connected and reproduced.
(3) A portion that has been viewed on the mobile TV receiver 1 and a portion that cannot be viewed are reproduced at a constant speed, but a portion that cannot be viewed on the mobile TV receiver 1 when the user performs a predetermined operation. Skip to

  The user operates the operation unit 42 of the home server 2 to select any one of the reproduction patterns (1) to (3). The control unit 41 of the home server 2 reads the recorded data from the recorded data recording unit 43 with the reproduction pattern selected by the user, and reproduces the program.

  For example, when the program A is reproduced with the above-described reproduction pattern (2), the recorded data for 12 seconds is read from the recorded data recording unit 43 from the position of 19:05:43 and reproduced, and then 19:10 Recording data for 630 seconds from the position of minutes 20 seconds is read from the recording data recording unit 43 and reproduced, and then recording data for 3 seconds is read from the position of 20:15:15 from the recording data recording unit 43. Reproduce.

  As described above, according to the broadcast receiving system of the present embodiment, the program being viewed on the go is recorded on the home server 2, and the program cannot be viewed on the mobile TV receiver 1 for some reason. Since reception failure information is sometimes recorded in the mobile TV receiver 1, the program recorded on the home server 2 can be efficiently viewed based on the reception failure information. This eliminates the need for the user himself / herself to search for a portion that could not be viewed on the mobile TV receiving apparatus 1 and improves convenience.

  In the above example, when the user switches from viewing program A to viewing program B, home server 2 also ends recording of program A and starts recording of program B. Thus, when the mobile TV receiver 1 changes to the program B before the program A is finished, the home server 2 continues to record the program A, and after the program A is finished, the program B starts to be recorded. It may be.

  In the above embodiment, the time when the program cannot be viewed is recorded in the reception failure information recording unit 23 as a reception failure even for a short time, but when the time when the program cannot be viewed is shorter than a certain time, The reception failure information recording unit 23 may not record the reception failure.

  Furthermore, in the above embodiment, the reception failure information is transferred from the mobile TV receiver 1 to the home server 2 when the vehicle returns to the vicinity of the home, but the reception failure information is moved each time a reception failure occurs. The data may be transferred from the body TV receiving device 1 to the home server 2.

  Furthermore, in the present embodiment, the case where the mobile TV receiver 1 is a vehicle-mounted device has been described. However, the mobile TV receiver 1 is not limited to the vehicle-mounted device in the present invention. The present invention can also be applied when the TV receiver 1 is a portable TV or a mobile phone with a built-in TV.

FIG. 1 is a schematic diagram showing a TV broadcast receiving system according to an embodiment of the present invention. FIG. 2 is a block diagram showing the configuration of the mobile TV receiver. FIG. 3 is a block diagram showing the configuration of the home server. FIG. 4 is a flowchart showing the operation of the TV broadcast receiving system according to the embodiment. FIG. 5A is a diagram showing an example of a recording list recorded on the home server, and FIG. 5B is a diagram showing an example of a list of failure information recorded on the mobile TV receiver.

Explanation of symbols

1 ... mobile TV receiver,
2 ... Home server,
21, 41 ... control unit,
22, 42 ... operation part,
23, 43 ... recording section,
24, 44 ... tuner section,
25, 45 ... OFDM demodulator,
26, 46 ... MPEG-TS demodulator,
27, 47 ... D / A converter (video),
28, 48 ... D / A converter (voice),
29, 49 ... drive circuit,
30, 50 ... amplifier,
31, 51 ..communication device.

Claims (6)

A television broadcast receiving system composed of a mobile broadcast receiving device and a recording device capable of communicating with each other,
The mobile broadcast receiver is
A first tuner unit that receives a television broadcast wave and outputs a broadcast signal;
A first signal processing unit that processes a broadcast signal output from the first tuner unit and outputs a video signal;
A first control unit that controls the first tuner unit and the first signal processing unit;
A reception failure information recording unit in which reception failure information is written by the first control unit when a reception failure occurs;
A first communication unit that is controlled by the first control unit to communicate with the recording device;
The recording device comprises:
A second tuner for receiving a television broadcast wave and outputting a broadcast signal;
A second signal processing unit for processing a broadcast signal output from the second tuner unit and outputting a video signal;
A second control unit for controlling the second tuner unit and the second signal processing unit;
A recorded data recording unit that records a video signal that is controlled by the second control unit and output from the second signal processing unit;
A second communication unit that is controlled by the second control unit and connected to communicate with the mobile broadcast receiver;
The second control unit of the recording device acquires the reception failure information from the mobile broadcast reception device, and reads a video signal written in the recording data recording unit based on the reception failure information. A featured TV broadcast receiving system.   The second control unit of the recording device acquires information indicating a program being viewed on the mobile broadcast receiver via the second communication unit, and is viewed on the mobile broadcast receiver. The television broadcast receiving system according to claim 1, wherein a video signal of a program being recorded is recorded in the recording data recording unit.   The first control unit is configured such that when the reception intensity of the radio wave received by the first tuner unit is lower than a predetermined value, when the power is turned off, when the input source is switched, or when the channel is switched. It is assumed that a reception failure has occurred at any of the above times, and the reception failure information recording unit uses the time when the reception failure occurred and data indicating the program received up to that time as the reception failure information. The television broadcast receiving system according to claim 1, wherein recording is performed.   The second control unit of the recording device controls the recording data recording unit based on the reception failure information, and reproduces a video of a period in which the reception failure has occurred in the mobile broadcast reception device at a constant speed, The television broadcast receiving system according to any one of claims 1 to 3, wherein video of another period is played back at high speed.   The second control unit of the recording device controls the recording data recording unit based on the reception failure information, and continuously plays back images during a period in which the reception failure has occurred in the mobile broadcast receiving device. The television broadcast receiving system according to any one of claims 1 to 3.   4. The second control unit of the recording apparatus skips and plays back a video of a period recorded in reception failure information in accordance with a predetermined operation performed during playback. The television broadcast receiving system according to any one of the above.

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