JP2009194589A - Video signal output device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video signal output device having possibility of receiving instructions to invalidate operation or to stop operation from a video display, in which output is not stopped immediately after starting the output of a video signal. <P>SOLUTION: A video reproducing system 10 includes a DVD recorder 1 and a television 101. The DVD recorder 1 requires that the television 101 is switched to an external input so that a video image output by the DVD recorder 1 is displayed if reproduction is instructed, and starts output of the video signal. At this time, even if the DVD recorder receives instructions to invalidate the operation from the television 101, when it receives the instructions within a prescribed time from the start of reproduction, the DVD recorder disregards the request for invalidation and continues reproduction and output of the video signal. Meanwhile, when the prescribed time includes passed since the start of the reproduction, the recorder determines that other apparatuses become active, and stops output of the video signal or reproduction. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a video output device connected to a video display device such as a television, and to a video signal output device controlled by the video display device.

  Conventionally, video display devices (televisions, monitors, projectors) and video signal output devices (reproducing devices, cameras, game machines, etc.) complying with the HDMI-CEC standard have been put into practical use. When a television according to this standard receives an operation signal from a remote controller or a key attached to the main body, it controls various devices connected to the television. For example, when the first playback device and the second playback device are connected to a television with an HDMI cable, the television according to the standard can operate these playback devices from the television remote control. When the television receives a reproduction instruction from the first reproduction device, the television sends the reproduction instruction to the first reproduction device. At the same time, an instruction for invalidating the operation (hereinafter referred to as an operation invalidation instruction) is sent to devices other than the first playback device. When the first playback apparatus receives a playback instruction from the television, the first playback device sends an instruction to the television to switch to the external input 1 and outputs a video signal to the television in order to display the playback video. Thereby, the television switches to the external input 1 and displays the video of the first playback device.

  In addition, when the playback device is playing back, if an instruction to invalidate the operation is received from the television, the specification of the playback device manufacturer can be set to temporarily stop playback. This specification takes into account the user's trouble of rewinding when resuming playback later when the frame advancement of the video is continued even after the screen is switched.

Patent Documents 1 to 5 disclose video processing devices and the like that comply with the HDMI standard.
JP 2007-259115 A JP 2007-150853 A JP 2007-104138 A JP 2005-184079 A JP 2004-208290 A

  However, some televisions send an operation invalid instruction to all devices connected via HDMI when switching to this external input. When the playback device requests the television to switch to the external input in order to start playback, the television sends an operation invalidation instruction to all connected devices. As described above, if the playback device is designed to stop playback upon receiving an instruction to invalidate the operation, there is a possibility that playback will stop immediately upon switching to the external input. As a result, the DVD recorder may be subject to claims.

  Further, the stop of reproduction may occur not only when an instruction for controlling the reproduction apparatus is sent via the television but also when an instruction is directly sent to the reproduction apparatus. In this case, when playback is started, the television is instructed to switch to external input so that this video can be displayed. At this time, there is a risk of receiving an operation invalidation instruction from the television.

  Therefore, the present invention provides a video signal output device that may receive an instruction to disable or stop operation from a video display device such as a television, and does not stop the output immediately after the start of video signal output. The purpose is to do.

  In order to solve the above problems, the following configuration can be provided.

(1) a video signal output unit for outputting a video signal;
Receiving from the video display device an instruction of operation invalidity or operation stop,
When the receiving unit receives the operation invalidation or operation stop instruction, the video signal output unit, in the video signal output device for stopping the output of the video signal,
The video signal output unit
(A) The reception unit is disabled or stopped within a predetermined time period after either the output of the video signal is started or after the video signal output device receives an instruction of the video signal. To determine whether or not
(B) If the determination is affirmative, ignore the instruction and continue outputting the video signal;
(C) If the determination is negative, the output of the video signal is stopped.

  If an invalid instruction is received from the video display device within a predetermined time after starting the output of the video signal or giving the instruction, the video display device (TV, monitor, projector, etc.) There is a high possibility that an invalid instruction is issued when switching the input to the video of the signal output device or the video signal output device receives an abnormal instruction. Therefore, in this configuration, (A) it is determined whether or not an operation invalidation instruction has been received within a predetermined time. (B) If the determination is affirmative, the instruction is ignored and playback is continued. Therefore, it is possible to solve the problem that the reproduction stops immediately after the reproduction is started. Therefore, the accompanying claims can be resolved.

  (C) If the determination is negative, output of the video signal is stopped. In this case, for example, when switching is instructed so that another device becomes active, the invalidation instruction is validated, and this instruction can be accepted in normal times. That is, instead of always ignoring an instruction to invalidate the operation, the determination of (A) is made, so that the instruction can be invalidated only when an abnormal instruction is received.

  In addition, regarding the determination of (A) above, if it can be said that (A) is determined as a result of actual operation, regardless of the determination criteria of the program or determination circuit installed in the apparatus, This is also included in the criterion (A). Even in this case, if it can be said that the processes (B) and (C) are performed based on the determination, the process does not stop immediately after the reproduction is started. Therefore, in this case, there is an effect that the above problems can be solved. The same applies to the following (2). The determination of “within a predetermined time” may be that the process of (B) is “below the predetermined time” and the process of (C) is “beyond the predetermined time”, and the process of (B) May be “less than a predetermined time” and the process of (C) may be “more than a predetermined time”. The configuration of (2) is the same.

(2) a video signal output unit for outputting a video signal;
A transmission unit that requests input switching to display a video signal output from the video signal output unit for a video display device that displays the video of the video signal;
Receiving from the video display device an instruction of operation invalidity or operation stop,
When the receiving unit receives the operation invalidation or operation stop instruction, the video signal output unit, in the video signal output device for stopping the output of the video signal,
The video signal output unit
(A ′) within a predetermined time after the transmission unit requests the input switching, it is determined whether the reception unit has received an instruction to invalidate or stop the operation,
(B) If the determination is affirmative, ignore the instruction and continue outputting the video signal;
(C) If the determination is negative, the output of the video signal is stopped.

  Therefore, in this configuration, a transmission unit is provided, and the video signal output device requests the video display device to perform input switching. When an invalid instruction is received from the video display device within a predetermined time after requesting input switching, the video display device (TV, monitor, projector, etc.) switches the input to the video of the video signal output device. There is a high possibility that an instruction to invalidate the operation is issued when the video signal is output or the video signal output device receives an abnormal instruction.

  Therefore, in this configuration, (A ′) it is determined whether or not an operation invalidation or operation stop instruction has been received after requesting input switching. (B) If the determination is affirmative, the instruction is ignored. And continue playback. Therefore, it is possible to solve the problem that the reproduction stops immediately after the reproduction is started. Therefore, the accompanying claims can be resolved.

  (C) If the determination is negative, output of the video signal is stopped. In this case, for example, when switching is instructed so that another device becomes active, the invalidation instruction is validated, and this instruction can be accepted in normal times. In this way, since the instruction (A ′) is made instead of always ignoring the instruction such as invalid operation, the instruction can be invalidated only when an abnormal instruction is received.

  Note that “input switching” may be switched from a channel that receives broadcasts to an input that receives video of the video signal output device, for example, an external input, or a video signal selected from a plurality of video signal output devices. You may switch to an output device.

(3) The video signal output device is a device that reproduces a video signal recorded on a recording medium and outputs it.
When stopping the output of the video signal, the video signal output unit pauses the reproduction.

  (4) The receiving unit receives various operation instructions to the video signal output device main body via the video display device by receiving an operation instruction other than the operation invalidation or operation stop from the video display device. You may make it accept.

  (5) The receiving unit may conform to the HDMI-CEC standard.

  According to the present invention, in a video signal output device that is connected to a video display device (such as a television) and receives an operation invalidation or operation stop instruction from the video display device, there is a risk that the video signal output device stops immediately after the start of video signal output. Can be resolved.

  FIG. 1 shows an outline of a video reproduction system 10 according to an embodiment of the present invention. The system 10 includes DVD recorders 1 and 109, a television 101, a TV remote control 80 for the television 101, and HDMI cables 107 and 108. The recorders 1 and 109 and the television 101 comply with the HDMI-CEC standard, and transmit and receive digital video signals, audio signals, and various control signals 71 to 74 via the cables 107 and 108.

  DVD recorders 1 and 109 reproduce video signals recorded on a recording medium and output them to the television 101. It also receives broadcasts and records video signals. The television 101 receives the broadcast and displays it on the display unit. Also, the television 101 accepts switching to an external input in addition to a channel for receiving broadcasts. When the television 101 receives an instruction to switch the external input, the television 101 receives an input of a video signal from the outside and displays it on the display unit.

  The recorders 1 and 109 and the television 101 acquire various kinds of information by transmitting and receiving control signals 71 to 74. For example, the aspect ratio of the television, the resolution of the recorder 1, the on / off state of the apparatus, and the like are acquired. In addition, the television 101 receives operations of the recorders 1 and 109 from the TV remote controller 80. In response to this operation, the television 101 issues a playback instruction, a recording instruction, and the like to the DVD recorders 1 and 109. Further, when executing playback of the DVD recorder 1, the DVD recorder 1 requests the television 101 to switch to external input. Thus, the user can control the entire video reproduction system 10 only by operating one TV remote controller 80. In addition, since the operations are integrated, there is no need to perform a useless operation such as switching to an external input.

  The television 101 displays the broadcast received by the broadcast receiving unit. In addition to a channel for receiving television, a channel for inputting a video signal from the outside is provided, and when switching to that channel, the video is displayed.

A processing flow in the case where the user instructs the DVD recorder 1 to reproduce using the TV remote controller 80 of the television 101 will be described with reference to FIG.
ST0: Assume that the DVD recorder 109 is currently playing.
ST1: The TV remote control 80 transmits a remote control signal 70 to the television 101.
ST2: In response to this, the television 101 sends a control signal 72 (playback instruction) to the DVD recorder 1.

  ST3: At substantially the same time as ST2, the television 101 issues a request for invalid operation to the DVD recorder 109. The request for invalid operation (hereinafter simply abbreviated as “invalid”) is to inform the television 101 that the DVD recorder 109 is not currently active and that the television 101 cannot display the video. In response to this request, the DVD recorder 109 may stop outputting the video signal or pause the reproduction. Whether playback is paused can be determined by the specifications of the DVD recorder manufacturer. If the specification is such that the playback is paused, the frame is not sent without permission while it is not displayed on the screen, and the user can use it easily when the playback (resume playback) is resumed later. Note that the recorders 1 and 109 conform to this specification.

  ST4: The DVD recorder 1 outputs a control signal 71 (switching to an external input) to the television 101 in order to display the reproduced video on the television 101, and inputs it to an external channel that can display the video of the recorder 1. Request switching. Thus, the user can view the playback video immediately after playback without switching the television 101 to the external input.

  ST5: A video signal and an audio signal are output to the television 101 after or substantially simultaneously with ST4. As a result, the playback video can be viewed.

  ST6, ST7, ST8: In ST8, the television 101 switches to an external input (a state in which it is accepted). As a premise, in ST6 and ST7, an invalid request is issued to all the HDMI devices 1 and 109 connected to the television 101.

  According to the investigation, there are TVs that issue invalid requests to all the HDMI devices 1 and 109 when switching to the external input in this way, depending on the manufacturer. In this case, when the DVD recorder 1 requests the television 101 to switch to external input, the recorder 1 receives an invalid request even immediately after the start of reproduction. And according to the above-mentioned specification, there is a possibility that the reproduction stops immediately after the reproduction is started. Therefore, the processes of ST9 and ST10 are performed.

  ST9: After the DVD recorder 1 outputs the video signal, it is determined whether it is within 1 second until the invalidation request in ST7 is received. It is assumed that a television that issues an invalid request when switching to external input transmits an invalid request to the television 101 within one second at the latest.

  ST10: Therefore, if this determination is affirmative (YES in ST9), the invalid request is ignored. As a result, since the reproduction is continued, it is possible to solve the problem that the reproduction stops almost simultaneously with the instruction to start the reproduction.

  On the other hand, if this determination is negative (NO in ST9), the reproduction is stopped. For example, when the user has played the DVD recorder 1 up to now and starts operating the recorder 109, it is highly likely that one second or more has elapsed since the playback. In this case, the recorder 1 accepts this invalid request and stops reproduction.

  Note that the time determined in ST9 may be a sufficient time until the invalidation request is received after the reproduction is instructed. For example, even if it is not 1 second, it can be set to a specific value of 1% ± 20%.

  Similarly, the DVD recorder 109 may stop playback in response to an invalid request and execute the processes of ST9 and ST10. In this case, if more than 1 second has elapsed since the start of reproduction, the reproduction is stopped in response to an invalid request in ST3.

  In the above, the starting point of the time in ST9 is from “output video signal”, but it may be from “requesting external input switching” in ST4, or “reproduction instruction in ST2”. It may be from "Received". Regardless of the program installed inside, as an actual operation, it can be said that the processing of ST10 is performed based on whether or not an invalid request is received within a certain time after a reproduction instruction is given to the DVD recorder 1. Then, the above problems can be solved.

  In the above description, in ST5, the DVD recorder 1 requests the television 101 to switch to the external input. However, even if the recorder 1 does not request, the television 101 may automatically switch to the external input upon receiving the reproduction instruction. In this case, a transmission unit for transmitting a control signal for requesting switching from the DVD recorder 1 to an external input is not necessarily required. In this case, the starting point of time in ST9 cannot be set after “requesting external input switching” in ST4, but the starting point of time in ST9 is set after “output video signal”. However, it may be after “receiving a reproduction instruction” in ST2.

  Also, in the determination of ST9, “within” and “beyond” may be “less than” and “more than”, respectively. It is sufficient to make a judgment based on time.

  Next, configuration examples of the DVD recorder 1 and the television 101 will be described with reference to FIGS.

  FIG. 3 is an example of a block diagram of the DVD recorder 1. The DVD recorder 1 includes a broadcast receiving unit 2, an encoding unit 3, a recording / reading unit 4, a signal processing unit 5, an output unit 6, an operation unit 8, and a control unit 9.

  The broadcast receiving unit 2 includes a digital broadcast receiving unit and an analog broadcast receiving unit. A broadcast signal is received via the antenna 100, and a video signal, an audio signal, and character information are extracted. The digital broadcast receiving unit includes a digital broadcast tuning unit, a terrestrial digital module, and a decoder. The analog broadcast receiving unit includes an analog broadcast channel selection unit, a video reception unit, and a color signal reproduction unit. In addition, a reception control unit that controls the inside of the broadcast receiving unit 2 is provided.

  The digital broadcast channel selection unit includes a tuner pack, a terrestrial digital module, an OFDM demodulation circuit, and an error correction circuit, amplifies a frequency band of a predetermined physical channel, and outputs a TS (Transport Stream). The tuner pack includes an IF filter, an IF amplifier, and the like. The reception control unit stores the channel table in an internal flash memory (not shown) by the initial setting process 95.

  The IF filter (intermediate frequency) passes a signal of a predetermined physical channel designated by the reception control unit. The IF amplifier amplifies this signal. Thereby, the digital broadcast channel selection unit extracts the broadcast signal of the channel designated by the reception control unit. Further, the OFDM demodulation circuit performs OFDM demodulation (Orthogonal Frequency Division Multiplexing) on the input broadcast signal to digital data TS (transport stream) and outputs the result to the error correction circuit. The error correction circuit corrects the TS error information and outputs it to the terrestrial digital module.

  The terrestrial digital module includes a multiplexer and a buffer memory. A plurality of virtual channel programs are multiplexed and transmitted in the TS. The demultiplexer extracts a packet of one channel among these virtual channels, and stores the data stored in the extracted packet in the buffer memory. These packets are composed of digital video signals in the MPEG format. The decoder extracts a video signal packet from a buffer memory inside the module, and decodes the video signal.

  The analog broadcast channel selection unit includes a filter that extracts an intermediate frequency and an intermediate frequency amplification unit that amplifies the intermediate frequency band, and amplifies a broadcast signal in a predetermined physical channel band. The video receiver amplifies the frequency of the video band and extracts a video signal. The color signal reproduction unit extracts a color signal from the color video signal and generates RGB three primary color signals. The synchronization detection circuit extracts a horizontal synchronization signal and a vertical synchronization signal from the color video signal.

  The encoding unit 3 encodes the video signal and the audio signal input from the broadcast receiving unit 2. In addition, an A / D converter is provided, and if the input video signal is in an analog format, A / D conversion is performed in advance before encoding. The encoding unit 3 outputs the encoded data to the recording / reading unit 4.

  The recording / reading unit 4 includes an optical disk drive 41, a hard disk 42 (abbreviated as HD 42), and a hard disk drive 43 (abbreviated as HDD 43). The drive 41 irradiates a DVD 103, which is one type of recording medium, with laser light and detects a reflected light thereof, and a focus servo control that controls the irradiation position of the laser light irradiated on the DVD 103. And a servo control unit (not shown) for performing tracking servo control and the like. With these configurations, the drive 41 reads and records the DVD 103. The HD 42 is one type of recording medium. The HDD 43 records data on the HD 42 and reads the recorded data. With such a configuration, the recording / reading unit 4 records the video signal and the audio signal encoded by the encoding unit 3 on the DVD 103 or the HD 42.

  The signal processing unit 5 includes a decoder (8/16 demodulation unit, MPEG decoder), an adjustment processing unit, and an OSD synthesis unit 51. The 8/16 demodulator performs 8/16 demodulation or the like on the RF signal read by the recording / reading unit 4, performs error correction, and extracts video data and audio data. The MPEG decoder separates video data and audio data and decompresses them separately.

  The adjustment processing unit 42 adjusts the luminance, aspect ratio, scaling, and the like of the video signal decoded by the decoder 41. A decoder for decoding a video signal encoded in a format other than the MPEG decoder may be provided. Further, the output of the broadcast receiving unit 2 may be input to the OSD synthesis unit 51 without passing through the decoder.

  The OSD synthesizing unit 51 synthesizes an OSD (On-Screen Display) such as a character and a character based on a command issued by the control unit 9. The OSD synthesis unit 51 stores various image data therein. For example, characters and graphics for displaying various character strings, and frame images such as a user interface displayed in the initial setting process 95 are stored. The OSD is output by combining these frame images with characters and graphics. When the video signal is output from the MPEG decoder, the OSD synthesis unit 51 synthesizes the video signal and the OSD and outputs the synthesized signal to the first HDMI transmission / reception unit 6. In some cases, the OSD synthesis unit 51 may prohibit the output of the video signal and output only the OSD.

  The first HDMI transmission / reception unit 6 is a transmission / reception unit compliant with the HDMI-CEC standard, and transmits / receives signals to / from the television 101. The transmission / reception unit 6 transmits the video signal, the audio signal, and the control signal processed by the signal processing unit 5 in a digital format. A control signal is transmitted according to the CEC standard, and an instruction is transmitted to the television 101. For example, it requests the information on the resolution of the television 101 or instructs the channel switching so that the output signal of the DVD recorder 1 is displayed. In addition, an instruction to operate the DVD recorder 1 is received from the television 101. For example, a reproduction instruction is received.

  The operation unit 8 receives an input for instructing an operation on the apparatus main body. The operation unit 8 includes operation keys and a remote control reception unit. The operation keys are provided on the apparatus main body. The remote control receiving unit receives a control code for the apparatus main body transmitted from the recorder remote control 81. The operation unit 8 receives an input corresponding to an operation key operated by the user. The control code received by the remote control receiving unit and the code corresponding to the main body operation key are transmitted to the control unit 9. The remote controller 80 may include, for example, a cursor key, a numeric key, a recording reservation key, an enter key, a release key, and a recording key as operators. The recorder 1 accepts channel and number input with numeric keys, and accepts selection of various settings such as recording reservation and initial setting with cursor keys. When the enter key is pressed, the control unit 9 performs processing according to the selected item. In addition, the recorder 1 accepts a recording reservation and recording instruction by a recording reservation key and a recording key.

  In the above description of the operation unit 8, an instruction is directly sent to the first remote control reception unit of the DVD recorder 1. However, as described in FIG. 1, the operation of the DVD recorder 1 is performed via the television 101. The DVD recorder 1 does not necessarily require the operation unit 8 as long as it receives an instruction from the television 101.

  The control unit 9 is configured by a microcomputer or a system IC including the microcomputer. The control unit 9 includes a ROM (may be a flash memory), a CPU, and a RAM. The control unit 9 controls the operations of the respective units 2 to 8 based on the input received by the operation unit 8. The ROM of the control unit 9 stores a subroutine for executing a recording reservation process 91, a recording process 92, a reproduction process 93, and an initial setting process 95. Further, a flash memory 99 is connected to the outside of the control unit 9, and the state of the DVD recorder 1 and various initial setting information are recorded therein.

  The recording reservation process 91 is a process of outputting a user interface to the television 101 using the OSD composition unit 51 and accepting a recording reservation. The recording process 92 is a process for recording a video signal. The reproduction process 93 is a process for reproducing a video signal recorded on a recording medium (DVD 103, HD42). The initial setting process 95 is a process for outputting an OSD to the television 101 and receiving various settings. For example, it accepts channel settings, audio settings, image aspect ratio settings, and language settings.

  The combination of the first HDMI transmission / reception unit 6 and the control unit 9 corresponds to the “video signal output unit” of the present invention.

  An example of a television 101 (television) that is an embodiment of the present invention will be described with reference to FIG. The television 101 includes a first broadcast receiving unit 13, a second HDMI transmitting / receiving unit 132, a signal processing unit 14, a control unit 15, a display unit 16 including a liquid crystal panel 160, and an operation unit 18.

  The second remote control receiving unit 181 receives an infrared signal from the remote control 80 for operating the television 101 and transmits the remote control signal to the control unit 15.

  The antenna 101 is connected to the first broadcast receiving unit 13 via a connector provided on the back surface of the television 101. The antenna 101 receives radio waves. The second first broadcast receiving unit 13 and the signal processing unit 14 have the same configurations as the broadcast receiving unit 2 and the signal processing unit 5 of the DVD recorder 1, respectively. When the video signal decoded from the second HDMI transmission / reception unit 132 is input to the signal processing unit 5, the video signal may be input to the adjustment processing unit 142 without using the decoder 141.

  The second HDMI transmission / reception unit 132 communicates with the DVD recorder 1 and receives a video signal. For example, the transmission / reception unit 132 transmits a command such as reproduction to the DVD recorder 1. In addition, a request for channel switching to an external input is received from the DVD recorder 1.

  The display unit 16 includes a liquid crystal panel 160, a liquid crystal panel drive circuit 161, liquid crystal drivers 161a and 161b, a backlight drive circuit 164, and a speaker 165. The liquid crystal panel 160 includes two transparent plates, a liquid crystal placed therein, a deflection plate stretched on each of the two transparent plates, and a transparent electrode for applying a voltage to the liquid crystal at the position of each pixel. Have Each of the plurality of liquid crystal drivers 161a and 161b includes a D / A converter, and applies a voltage to each pixel according to the color tone of each pixel to be output. The liquid crystal molecules move according to the applied voltage, and the transmittance of light transmitted through the liquid crystal panel 160 changes in each pixel. The liquid crystal panel 160 has signal lines and scanning lines formed therein, and pixels are formed in a matrix corresponding to these. A voltage corresponding to the RGB value to be output is applied from the signal line and held. Each pixel is provided with an electronic switch. This electronic switch is turned on on condition that a voltage is output to the scanning line, and the voltage of the signal line is applied to each pixel. Thereby, each pixel can be selected and a predetermined voltage can be applied.

  The backlight 163 is disposed on the back side of the liquid crystal panel and emits light. For example, this can be a cold cathode fluorescent lamp (CCFL). The light illuminated by the backlight 163 passes through the display surface of the liquid crystal panel 160. The drivers 161a and 161b change the light transmittance of each pixel, and an image is displayed on the display surface of the liquid crystal panel 160. A reflector (not shown) is provided on the back surface of the backlight 163 and reflects light toward the display surface of the liquid crystal panel 160. With this light, the liquid crystal panel 160 displays characters and images.

  The liquid crystal panel drive circuit 161 includes liquid crystal drivers 161a and 161b buffer memory, a panel clock generation circuit, and the like. The video signal output from the OSD synthesis unit 43 is temporarily stored in this buffer memory. The panel clock generation circuit generates a panel clock that is an operation clock of the liquid crystal panel 160. The driving circuit 161 sequentially takes out the video signals stored in the buffer memory in synchronization with the panel clock and outputs them to the liquid crystal drivers 161a and 161b.

  The backlight driving circuit 164 generates a high voltage and applies a voltage to the backlight 163. The circuit 164 includes a circuit that adjusts a voltage output to the backlight 163. Thereby, the circuit 164 adjusts the brightness of the display unit 10.

  The speaker 165 converts the audio signal output from the DVD recorder 1 into audio. Note that the speaker 165 may be configured separately from the television 101.

  The control unit 15 is configured by a microcomputer, and includes a CPU 151, a RAM 152, and a ROM 153 for storing control data. The control unit 15 controls the operations of the receiving unit 3, the signal processing unit 4, and the circuits 161 and 162 of the display unit 10 based on the input received by the operation unit 18. The ROM of the control unit 9 stores a subroutine for executing the setting process 154, the CEC process 155, and the channel switching process 156.

  The setting process 154 is a process for receiving various settings such as channel settings by outputting the OSD. The CEC processing 155 is processing for transmitting / receiving a request to / from a device connected by an HDMI cable using the second HDMI transmission / reception unit 132. The channel switching process 156 is a process for switching the channel and the external input, and is a process for switching to the input for displaying the video of the DVD recorder 1 connected to the outside in addition to switching the channel of the broadcast receiving unit 13.

  The operation unit 18 receives an input for instructing an operation on the apparatus main body. The operation unit 8 includes a remote control receiving unit 181 that receives a control code for a device main body transmitted from a power button or a remote control device (not shown). Thereby, the operation unit 18 receives an input corresponding to the operation key operated by the user, and transmits the control code to the control unit 9. In addition, the operation unit 18 receives operations of the DVD recorders 1 and 109.

  In the above description, the DVD recorder 1 is used as the video signal output device as the embodiment of the present invention. However, even if it is not the DVD recorder 1, it is only necessary to be able to transmit an input switching request to the television 101 so that a video signal can be output and the video of the device can be displayed from the input of a plurality of video signals. For example, instead of the DVD recorder 1, a TV game, a video camera, or a digital camera may be used.

  Further, as an embodiment of the present invention, a player dedicated to reproduction may be used instead of the DVD recorder 1. In this case, a configuration for receiving a broadcast and a configuration for recording are not necessary. For example, the broadcast receiving unit 2, the encoding unit 3, and the program for executing the recording reservation process 91 and the recording process 92 are unnecessary. As an embodiment of the present invention, the DVD recorder 109 may have the same configuration as the DVD recorder 1, or the DVD recorder 109 may not be connected or a plurality of DVD recorders 109 may be connected. Another video signal output device (TV game, video camera, digital camera) may be connected.

  As an embodiment of the present invention, the digital broadcast receiving unit may be a mobile phone that receives a PS (program stream) instead of a TS. The broadcast receiving units 2 and 13 do not necessarily include both a digital broadcast receiving unit and an analog broadcast receiving unit. Further, a monitor may be used instead of the television 101. As long as the television 101 can switch the input so that the video of the DVD recorder 1 can be displayed from the input of a plurality of video signals, the broadcast receiving unit 2 is not necessarily required. Further, as a means for displaying an image, a plasma monitor, an EL monitor, a cathode ray tube, a projector, or the like may be used instead of the liquid crystal monitor as in the television 101.

  In the above description, the DVD recorder 1 pauses playback upon receiving an invalid request. However, the specification may be such that playback and recording are not stopped, or the progress of a scene such as a TV game is not stopped, and the first HDMI transmitting / receiving unit 6 does not simply transmit a video signal to the television 101. In this case, when the invalidation request in FIG. 2 is received, there is a possibility that the video signal is not transmitted and the screen becomes dark or the screen color when the video is not displayed. Even in this case, this can be solved by performing the processes of ST9 and ST10.

  A remote controller (see 81 in FIG. 3) of the DVD recorders 1 and 109 may be provided. In this case, ST1 and ST3 are not executed. In this case, in ST2, the remote controller of the recorder 1 directly issues a playback instruction to the recorder 1. Even when a playback instruction is given by the remote controller of the recorder 1, there is a possibility that an invalid request may be received from the television 101 as long as switching of external input is requested. Therefore, even when the playback is instructed from the remote controller of the recorder 1, the above-described problems can be solved by performing the processes of ST9 and ST10. Therefore, as an embodiment of the present invention, the remote controller only needs to be able to instruct the recorder 1, which may be via the television 101 or may directly instruct the recorder 1. In addition, it is only necessary to instruct the recorder 1 to operate from either the recorder 1 or the television 101, and it is only necessary to operate with one of the remote controllers without providing both remote controllers. Further, the output of a video signal such as playback may be instructed from either the recorder 1 or the television 101 without using a remote controller.

  The operation invalidation request from the television 101 may be a request to stop the operation as long as it is possible to transmit that either one of the DVD recorders 1 and 109 is not active.

  In the above description, an apparatus conforming to the HDMI-CEC standard has been described as an example. However, the embodiment of the present invention need not be limited to an apparatus conforming to this standard. It is sufficient that the control signal can be transmitted and received between the devices of the video reproduction system 10. It is not necessary to follow a specific standard, and it is not necessary to transmit a control signal together with a video signal with a single cable unlike HDMI. Further, transmission of control signals, video signals, and audio signals between the systems 10 may be wired or wireless.

  3 and 4, the configuration has been described with blocks separated for each function. However, for implementation, any of these functions may be configured by a system IC in which a plurality of functions are integrated. One block may be divided into a plurality of blocks.

1 shows a schematic configuration of a video reproduction system of the present embodiment. It is a flowchart showing the reproduction | regeneration processing of this embodiment. The structural example of the DVD recorder of this embodiment is shown. The structural example of TV of this embodiment is shown.

Explanation of symbols

10-video playback system, 1-DVD recorder,
2-broadcast receiving unit 3-encoding unit 4-recording / reading unit
41-optical disk drive, 42-hard disk (HD),
43-hard disk drive (HDD),
5-signal processing unit, 51-OSD combining unit, 6-first HDMI transmitting / receiving unit,
8-operation part, 80-TV remote control, 81-recorder remote control,
9-control unit, 91-recording reservation process, 92-recording process,
93-playback process, 95-initial setting process,
99-flash memory, 103-DVD,
100-antenna, 101-TV,
105-antenna, 13-first broadcast receiver,
132-second HDMI transmission / reception unit, 14-signal processing unit,
141-decoder, 142-adjustment processing unit, 143-OSD synthesis unit,
15-control unit, 151-CPU, 152-RAM, 153-ROM,
16-display unit, 160-liquid crystal panel, 161a, 161b-liquid crystal driver,
161-liquid crystal panel drive circuit, 163-backlight,
164-backlight drive circuit, 165-speaker,
18-operation unit, 181-second remote control reception unit

Claims (5)

A video signal output unit for outputting a video signal;
Receiving from the video display device an instruction of operation invalidity or operation stop,
When the receiving unit receives the operation invalidation or operation stop instruction, the video signal output unit, in the video signal output device for stopping the output of the video signal,
The video signal output unit
(A) The reception unit is disabled or stopped within a predetermined time period after either the output of the video signal is started or after the video signal output device receives an instruction of the video signal. To determine whether or not
(B) If the determination is affirmative, ignore the instruction and continue outputting the video signal;
(C) A video signal output device that stops outputting the video signal when the determination is negative. A video signal output unit for outputting a video signal;
A transmission unit that requests input switching to display a video signal output from the video signal output unit for a video display device that displays the video of the video signal;
Receiving from the video display device an instruction of operation invalidity or operation stop,
When the receiving unit receives the operation invalidation or operation stop instruction, the video signal output unit, in the video signal output device for stopping the output of the video signal,
The video signal output unit
(A ′) within a predetermined time after the transmission unit requests the input switching, it is determined whether the reception unit has received an instruction to invalidate or stop the operation,
(B) If the determination is affirmative, ignore the instruction and continue outputting the video signal;
(C) A video signal output device that stops outputting the video signal when the determination is negative. The video signal output device is a device for playing back a video signal recorded on a recording medium and outputting it.
3. The video signal according to claim 1, wherein the video signal output unit pauses the reproduction when the output of the video signal is stopped in response to the operation invalidation or operation stop instruction. Output device.   The receiving unit receives instructions for various operations on the video signal output device main body via the video display device by receiving an operation instruction other than the operation invalidation or operation stop from the video display device. The video output apparatus in any one of 1-3.   The video signal output device according to claim 4, wherein the receiving unit conforms to an HDMI-CEC standard.

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