WO2008072695A1 - 映像音声出力機器、音声出力機器、映像音声再生機器、映像音声データ再生システム及び映像音声データ再生方法 - Google Patents
映像音声出力機器、音声出力機器、映像音声再生機器、映像音声データ再生システム及び映像音声データ再生方法 Download PDFInfo
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- WO2008072695A1 WO2008072695A1 PCT/JP2007/074032 JP2007074032W WO2008072695A1 WO 2008072695 A1 WO2008072695 A1 WO 2008072695A1 JP 2007074032 W JP2007074032 W JP 2007074032W WO 2008072695 A1 WO2008072695 A1 WO 2008072695A1
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- Prior art keywords
- audio
- video
- data
- output device
- reproduction
- Prior art date
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- 238000000034 method Methods 0.000 title claims description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 86
- GJWAPAVRQYYSTK-UHFFFAOYSA-N [(dimethyl-$l^{3}-silanyl)amino]-dimethylsilicon Chemical compound C[Si](C)N[Si](C)C GJWAPAVRQYYSTK-UHFFFAOYSA-N 0.000 description 63
- 238000010586 diagram Methods 0.000 description 24
- 230000003287 optical effect Effects 0.000 description 12
- 230000006854 communication Effects 0.000 description 11
- 238000004891 communication Methods 0.000 description 11
- 230000008859 change Effects 0.000 description 8
- 238000001514 detection method Methods 0.000 description 7
- 239000008186 active pharmaceutical agent Substances 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 230000007175 bidirectional communication Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 238000013139 quantization Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
- H04N5/775—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
- H04N21/42646—Internal components of the client ; Characteristics thereof for reading from or writing on a non-volatile solid state storage medium, e.g. DVD, CD-ROM
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/439—Processing of audio elementary streams
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
- G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
- G11B20/0042—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the copy protection scheme being related to a specific access protection standard
- G11B20/00463—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the copy protection scheme being related to a specific access protection standard high-bandwidth digital content protection [HDCP]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
- H04N2005/91307—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal
- H04N2005/91342—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal the copy protection signal being an authentication signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
- H04N2005/91357—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal
- H04N2005/91364—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal the video signal being scrambled
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/84—Television signal recording using optical recording
- H04N5/85—Television signal recording using optical recording on discs or drums
Definitions
- Audio / video output device audio output device, audio / video reproduction device, audio / video data reproduction system, and audio / video data reproduction method
- the present invention is an output source of audio data in a network such as a home entertainment network in which video and audio data are transmitted by one-way data connection and control messages are exchanged between devices.
- the present invention relates to a method of switching an output audio format from an audio playback device to an audio output device.
- HDMI High-Definition Multimedia Interface
- AV Anaudio Visual
- the HDMI standard defines CEC (Consumer Electronics Control) as a protocol for transmitting control signals in two directions.
- CEC Consumer Electronics Control
- one remote control unit can control multiple AV units by relaying control signals between units. That is, by transmitting control signals bi-directionally between TV (Television), AV amplifier and DVD player / recorder, it becomes possible to operate the entire home theater with one remote control.
- a playback device such as a DVD player / recorder reads the playback capability information of the connection destination device to match the output format of the video 'audio data, without deterioration of the signal due to digital transmission. It has the feature of preventing illegal copying by encrypting and transmitting video and audio data.
- the reproduction capability information is one-way data from a device equipped with an HDMI input port such as a TV or AV amplifier (referred to as “HDM I input device”) to a connection partner device (referred to as “HDMI output device”) It is transmitted using the connection Display Data Channel (DDC) bus.
- DDC is a standard of VESA (Video Electronics Standards Association) defined as a function to transmit display model information to connected devices in order to realize plug & play of the display.
- Information such as display model information and supported images and audio formats are stored in the memory of the HDMI input device as enhanced extended display identification data (SEDID).
- SEDID enhanced extended display identification data
- the EDID is read from the HDMI output device connected to the DDC bus via the DDC bus in response to the Low to High switch (or pulse) of the HP D (Hot Plug Detect Signal) by the HDMI input device. Ru. If the HPD is High, the HDMI output device can read out the EDID of the HDMI input device, and the TV or AV amplifier that is the HDMI input device is a digital image in the image 'audio format described in the EDID. 'Indicates that it has the ability to play audio data.
- HDCP High-bandwidth Digital Content Protection
- HP D Low-to-High switching or pulse
- the ability to match the data output format by reading the playback capability information of the connected device by the playback device is convenient.
- audio is output between the HDMI output devices connected to the playback device.
- the audio playback capability changes for example, because the device (speaker) to be used is changed, the playback capability information to be read is switched to the playback device each time, and the appropriate audio data is not sent. It has the disadvantage of not being.
- FIG. 1 is a diagram illustrating an example of an HDMI connection configuration.
- the DVD recorder 10 has one HDMI output port (10PO-1), and the AV amplifier 20 has one HDMI input port (20PI-1) and one HDMI output (20PO-1) port.
- the TV 30 is equipped with one HDMI input port (30PI 1). [0011]
- the DVD recorder 10, the AV amplifier 20, and the TV 30 are connected by HDMI, and the video and audio data are (10PO-1) ⁇ (20PI-1) ⁇ (20PO-1) ⁇ (30PI-1). It is transmitted in one direction. Control messages are transmitted bi-directionally on the HDMI control signal bus.
- the AV amplifier 20 can output PCM (Pulse Code Modulation) of 5.1 channels
- the TV 30 supports only PCM output of 2 channels
- the DVD recorder 10 can The DVD surround contents compatible with 1 channel digital surround shall be played back.
- TV mode the state in which both video and audio are output from the TV 30
- the video is as TV 30 power
- the audio is output from the AV amplifier 20 as “theater mode”.
- Switching between the television mode and the theater mode is triggered by the user's operation of the device, and is instructed from the TV 30 to the AV amplifier 20 using the CEC protocol. This is not the gist of the present invention, so a detailed description is given. Is omitted.
- FIG. 2 is a diagram showing an example of audio output in the television mode.
- audio the supported sampling frequency and the number of quantization bits, etc.
- video the type of video format to be supported etc. is set as playback capability information. Since it is not, detailed explanation is omitted.
- the HPD signal 30P that the TV 30 outputs to the AV amplifier 20 is set to High.
- the audio reproduction capability information 20C1 described in the E ID 20C of the AV amplifier 20 is converted to the audio reproduction capability information 30C1 of the TV 30 read from the TV 30.
- AV amplifier 20 has the ability to perform surround playback with 5 ⁇ 1 channel etc. If S is set to 2 or more channels in the audio playback capability information 20C1, multi-channel audio is played back from the DVD recorder 10 If this is done, audio will not be played correctly on the TV 30, which can only play 2 channel PCM.
- the HPD signal 20P that the AV amplifier 20 outputs to the DVD recorder 10 is set to High.
- the DVD recorder 10 reads out the EDID 20C of the AV amplifier 20, and the audio reproduction capability information 2 Based on 0C1, audio will be transmitted by 2-channel PCM that can be output by the TV 30.
- FIG. 3 is a diagram showing a conventional example of the video and audio data reproduction method in the HDMI connection.
- the audio reproduction capability information 30C1 of the TV 30 and the audio reproduction capability information 20C1 of the AV amplifier 20 are the same as those shown in FIG.
- the DVD recorder 10 conforms to HDCP and determines that there may have been a change in the HDMI connection status. Authentication is started again to confirm whether the connection partner device is a valid device or not: At the start of authentication, the output of the video data and audio data is stopped, and the EDI D 20 C of the AV amplifier 20 is read again, While transmitting a video signal (for example, blackout etc.) which does not need to protect the content, it is checked whether the AV amplifier 20 is a valid device, and the DVD recorder 10 is a device for which the AV amplifier 20 is valid.
- a video signal for example, blackout etc.
- the output of the video-audio data is started again, and the audio is output in the reproducible audio reproduction format indicated by the audio reproduction capability information 20C2 of the AV amplifier 20.
- the main point of the present invention is Because it is not, and a detailed description thereof will be omitted.
- FIG. 4 is a diagram showing another example of the HDMI connection configuration.
- the AV amplifier 21 has one HDMI output (21PO-1) port and one optical digital audio input (21PI 1), and the TV 31 has two HDMI input ports (31PI 1, 31PI 2).
- a difference from the connection configuration of FIG. 1 is that the DVD recorder 10 is connected to the HDMI input port (31PI-1) of the TV 31 which is not the AV amplifier 21, and the TV 31 and the AV amplifier 21 are optical audio It is a point connected by a digital cable.
- Video and audio data are transmitted in one direction, such as (10PO-1) ⁇ (31PI-1). Voice data is further transmitted from (31PO-1) to (21PI-1). Control messages are transmitted bidirectionally on the HD Ml control signal bus.
- the AV amplifier 21 can output 5.1-channel compressed audio (for example, Dolby Digital (registered trademark) format), and the TV 31 supports only 2-channel PCM output. I assume.
- FIG. 5 is a diagram showing an example of audio output in the television mode.
- the HPD signal 31 P that the TV 31 outputs to the DVD recorder 10 is set to High.
- the DVD recorder 10 reads out the EDID 31C of the TV 31, and based on the audio reproduction capability information 31C1, transmits the audio by 2-channel PCM that can be output by the TV 31.
- FIG. 6 is a diagram showing a conventional example of the video and audio data reproduction method in the HDMI connection.
- the sound reproduction capability information 31C1 of the TV 31 is the same as that shown in FIG.
- the audio output from the DVD recorder 10 is 2-channel PCM.
- the audio output from the AV amplifier 21 is also limited to two channels.
- the DVD recorder 10 conforms to HDCP, determines that there is a possibility that a change has occurred in the HDMI connection status, and authenticates again to confirm that the connection partner device is a legitimate device or not. Start. At the start of authentication, the DVD recorder 10 stops outputting the video and audio data, reads the EDID 31C of the TV 31 again, and transmits a video signal (eg, blackout, etc.) that does not require content protection. Check if the TV 31 is a valid device.
- a video signal eg, blackout, etc.
- Non-Patent Document 1 High— Definition Multimedia Interface specification Ver. 1.3
- the output of video and audio data (content) is stopped at the time of output and audio switching, and when HDCP authentication is performed, the video and audio data is output again.
- the problem is that, for a few seconds, there is a period in which content can not be viewed.
- An object of the present invention is to provide an audio / video output device, an audio output device, an audio / video reproduction device, an audio / video data reproduction system, and an audio / video data reproduction method.
- a video and audio data reproduction system comprises a video and audio reproduction device connected via a network for reproducing video data and audio data; An audio output device capable of outputting the audio data reproduced by the device; an image / audio output device capable of outputting the video data reproduced by the video / audio reproduction device and the audio data
- the ⁇ video data and the audio data are unidirectionally transmitted between any two data transmitters and data receivers.
- a control message is bi-directionally transmitted between all devices, and (iii) one-way transmission of voice reproduction capability information of the data receiving device is possible from the data receiving device side to the data transmitting device side.
- the control message includes information for setting an audio reproduction capability inquiry unit of an audio output device, audio reproduction capability information of the audio output device, and information indicating whether to use the audio reproduction capability in the control message.
- the audio / video output apparatus side control message transmission unit for transmitting to the audio reproduction apparatus, the video / audio output apparatus side control message transmission unit further includes one-way transmission. Information for setting whether or not to switch voice reproduction capability information is included in the control message and transmitted to the voice output device, and the voice output device detects the voice reproduction capability of the voice output device.
- the video and audio reproduction device comprises, from the video and audio output device, audio reproduction capability information of the audio output device, and information for setting whether or not to use the audio reproduction capability.
- a control unit for receiving the control message including the control message, and a reproduction unit for reproducing the video data and the audio data, and the video data and the audio data are transmitted to the network.
- the audio output device side control message reception unit transmits the video and audio output device side control message transmission unit.
- the voice output is performed.
- the voice vessel is using a one-way transmission to said audio-video reproduction device
- the video and audio reproduction device and the video and audio reproduction device are inhibited so that the video data and the audio data are transmitted in one direction from the video and audio reproduction device to the video and audio output device in the network by prohibiting retransmission of the reproduction capability information
- the video and audio output device and the audio output device are connected such that the audio data is output from the video and audio output device to the audio output device through a network different from the video and audio output device.
- the video / audio output device-side control message transmission unit transmits the control message
- the video / audio output device transmits one-way transmission to the video / audio playback device.
- the reproduction unit is a control message reception unit of the video and audio reproduction device.
- the control received from the video and audio output device, not in accordance with the audio reproduction capability information received by unidirectional transmission from the audio output device.
- the audio data is reproduced according to the audio reproduction capability information included in the message.
- the control message transmits the audio reproduction capability to the video and audio reproduction device. For this reason, regardless of the audio reproduction capability read out by one-way transmission, it is possible to switch the format of the audio reproduced by the video and audio reproduction device.
- the audio output device does not have to make the video / audio reproduction device read the audio regeneration capability. . In this way, it is possible to avoid the interruption (breakage) of video that occurs because authentication is required along with the change of the audio reproduction capability.
- a video / audio output device an audio output device, a video / audio reproduction device, a video / audio data reproduction system, and a video / audio data reproduction method capable of reducing the interruption of video 'and audio data conventionally generated.
- FIG. 1 shows an example of an HDMI connection configuration.
- FIG. 2 is a diagram showing an example of audio output in the television mode.
- FIG. 3 is a diagram showing a conventional example of a video and audio data reproduction method in HDMI connection.
- FIG. 4 is a diagram showing another example of the HDMI connection configuration.
- FIG. 5 is a diagram showing another example of audio output in the television mode.
- FIG. 6 is a diagram showing another conventional example of the video and audio data reproduction method in the HDMI connection.
- FIG. 7 is a diagram showing an example of a video and audio data reproduction method in an HDMI connection according to the first embodiment of the present invention.
- FIG. 8 is an external view of a video and audio data reproduction system.
- FIG. 9 is a diagram showing the configuration of a video and audio reproduction device according to the first embodiment of the present invention.
- FIG. 10 is a diagram showing the configuration of an audio output device according to the first embodiment of the present invention.
- FIG. 11 is a diagram showing the configuration of a video and audio output apparatus according to the first embodiment of the present invention.
- FIG. 12 is a diagram showing an example of a video and audio data reproduction method in the HDMI connection according to the second embodiment of the present invention.
- FIG. 13 is a diagram showing the configuration of an audio output device according to a second embodiment of the present invention.
- FIG. 14 is a diagram showing the configuration of a video and audio output apparatus according to a second embodiment of the present invention.
- an audio format that can be output by the video and audio reproduction device is designated by an instruction “notice by control message”. Then, even if the audio output capability is changed due to a change in the audio output device among the HDMI output destination devices connected to the video and audio reproduction device, the audio output device reads the audio and video reproduction device as well. Do not switch the data reproduction ability information to be issued. Therefore, the audio output device does not need to switch (pulse) the HPD signal from low to high for the video and audio reproduction device, so the video and audio reproduction device does not have to perform HDCP certification again. Therefore, the audio output device can cause the video / audio reproduction device to switch to the transmission of appropriate audio data without interruption of the video.
- FIG. 7 is a diagram showing an example of a video and audio data reproduction method with HDMI connection according to the first embodiment of the present invention.
- the HDMI connection configuration is the same as in FIG.
- the DVD recorder 10, the AV amplifier 20, the TV 30, the EDID 20C, 30C, and the HPD signal 20P, 30P are the same as in FIG. 2 and FIG.
- the audio reproduction capability information 30C1 of the TV 30 and the audio reproduction capability information 20C2 of the AV amplifier 20 are the same as FIG.
- FIG. 8 is an external view of the video and audio data reproduction system having the HDMI connection configuration shown in FIG.
- the video and audio data reproduction system includes a DVD recorder 10, an AV amplifier 20, and a TV 30.
- the DVD recorder 10 when switching to a television mode in which sound is output from the TV 30 (30 V), the DVD recorder 10 is not required to switch to sound output with 2-channel PCM in order to correctly reproduce the sound from the TV 30. must not.
- the TV 30 first instructs the AV amplifier 20 to switch the audio reproduction capability (30M1).
- This instruction is transmitted, for example, using the ⁇ Vendor Command> command of the CEC message, and the television mode (the audio output is TV30 and 2-channel PCM output is possible) / the theater mode (the audio output is the AV amplifier 20, the AV amplifier It is specified whether to change the setting contents of the EDI D of the AV amplifier 20 or not by switching the audio output with the reproduction capability of 20).
- EDID The case where the reproduction capability is changed is referred to as "switching mode", and the case where it is not changed is referred to as "fixed mode". In this embodiment, the fixed mode is designated.
- the AV amplifier 20 When the AV amplifier 20 receives a switching setting instruction (30M1) for audio reproduction capability from the TV 30, the AV amplifier 20 sends a switching setting notification (20M2) for audio reproduction capability to the TV 30.
- This notification is transmitted, for example, using a Vendor Command> command of a CEC message, and the switching setting mode enabled state in the AV amplifier 20 (the setting power of the fixed mode / switching mode and the audio of the AV amplifier 20)
- the audio playback capability includes the supported audio types (PCM, DTS (Digital Theater Systems), etc.), the maximum number of channels, the sampling frequency, the number of quantization bits, etc.
- the AV amplifier 20 accepts an instruction from the TV 30, and the fixed mode is set to the AV amplifier 20 to the TV 30, “fixed mode setting,
- the TV 30 power, etc. instructs the AV amplifier 20 to switch to the television mode (30 V), and the AV amplifier 20 mutes the audio output.
- the switching from the theater mode to the television mode and the operation thereof are not the gist of the present invention, so detailed description will be omitted.
- the AV amplifier 20 When switching from the theater mode to the television mode is performed, the AV amplifier 20 is set in a mode (fixed mode) in which the reproduction capability 20C of the EDI D is not changed, so it is necessary to pulse the HPD signal 20P. There is no Therefore, the DVD recorder 10 can continue the content output as it is without having to start HDCP authentication in order to confirm whether the AV amplifier 20 is a valid device or not.
- the TV 30 instructs the DVD recorder 10 to output audio format (30M3).
- This instruction is transmitted, for example, using a Vendor Command> command of a CEC message, and a mode designation indicating whether to use the reproduction capability of the AV amplifier 20 and a sound reproduction capability of the AV amplifier 20 are described. .
- the audio reproduction capability of the AV amplifier 20 described here is the same as the configuration / content notified to the TV 30 from the AV amplifier 20 in the switching setting notification (20M2) of the audio reproduction capability.
- the DVD recorder 10 When receiving the output audio format instruction (30M3) from the TV 30, the DVD recorder 10 sends an output audio format setting notification (10M4) to the TV 30.
- This notification is transmitted, for example, using a ⁇ Vendor Command> command of a CEC message, and describes the valid state of the mode in the DVD recorder 10 (whether the setting is the television mode or the theater mode).
- the television mode is set by permitting the instruction from the TV 30 by the DVD recorder 10.
- the television mode setting is also notified to the TV 30 of the DVD recorder 10 power, and the DVD recorder 10 outputs two channels of PCM audio, which is determined beforehand as an audio format in the television mode.
- the DVD recorder 10 can reproduce the audio reproduction capability information of the EDID 20 C of the AV amplifier 20.
- FIG. 9 is a diagram showing the configuration of a video and audio reproduction apparatus according to the first embodiment of the present invention, and the DVD and audio recorder 10 corresponds to the video and audio reproduction apparatus.
- the DVD recorder 10 includes an HDMI-OUT unit 101, an HPD switching detection unit 102, an EDD information acquisition unit 103, an authentication / encryption unit 104, a CEC device cooperation unit 105, a decoding unit 106, and a TMDS.
- An encoding unit 107 and a TMDS output unit 108 are provided.
- the HDMI-OUT unit 101 is an HDMI output port, and in the present embodiment, is HDMI-connected to the AV amplifier 20 and performs transmission of video and audio data and bidirectional communication of control messages.
- the HDMI-OUT unit 101 is used to transmit the HPD signal 101-1, DDC signal 101-2, TMDS signal 101-3, and CEC signal 101-4.
- the HDMI-OUT unit 101 is not limited to the HDMI, for example, provides equivalent functions regardless of wired or wireless, and may provide an interface according to an adapted communication method.
- the HPD switching detection unit 102 receives the HPD signal 101 1 input from the HDMI OUT unit 101. The switch from high to low and low to high is detected, and the EDD information acquisition unit 103 is notified.
- the EDD information acquisition unit 103 reads out the EDID of the AV amplifier 20 using the DDC signal 101-2 when receiving notification that the low power of the HPD signal is also switched to high.
- EDID describes a video / audio supportable format set by the AV amplifier 20.
- the EDD information acquisition unit 103 inputs the reproduction capability information of the video and audio into the decoding unit 106.
- the EDID of the AV amplifier 20 also states that the AV amplifier 20 is an HDMI device, and the EDD information acquisition unit 103 applies the HDCP authentication to the HDMI device to the authentication / encryption unit 104. , To start the authentication. Also, upon receiving notification of detection of the HPD signal being switched from high to low, the EDD information acquisition unit 103 instructs the authentication / encryption unit 104 to stop HDCP authentication.
- authentication / encryption unit 104 When receiving the authentication start instruction from EDD information acquisition unit 103, authentication / encryption unit 104 checks AV amplifier 20 and AV amplifier 20 in order to confirm whether the device is properly compatible with HDCP. Between them, use the DDC signal 101-2 to implement the HDCP authentication protocol. Since the TMDS output is necessary at the time of authentication, the authentication / encryption unit 104 outputs, to the TMDS output unit 108, data TMDS-encoded content that does not require copyright protection. Here, content data that does not require copyright protection indicates blackout video and the like.
- the authentication / encryption unit 104 instructs the TMDS encoding unit 107 to encode the content to be output into data for TMDS transmission, and output to the authentication / encryption unit 104, and the authentication is successful.
- the data for TMDS transmission is encrypted and output to the TMDS output unit 108. If authentication fails, content requiring copyright protection can not be output. Therefore, authentication / encryption unit 104 causes TMDS encoding unit 107 to stop the TMDS encoding of content and the output to authentication / encryption unit 104. And.
- the CEC device cooperation unit 105 exchanges a CEC message using the CEC signal 101-4.
- the CEC device cooperation unit 105 has an output voice setting unit 105-1, and the output voice setting unit 105-1 receives a CEC message (30M3) instructing an output voice format, and notifies an output voice format setting.
- Send a CEC message (10M4) I believe.
- the CEC message (30M3) for designating the output audio format if the shutter mode is set, the audio reproduction capability of the AV amplifier 20 described in the CEC message (30M3) is compared with the audio reproduction capability information. And outputs it to the decoding unit 106.
- the audio reproduction capability of the two channels determined in advance by the output audio setting unit 105-1 is used as the audio reproduction capability information in the decoding unit 106.
- Output when the television mode is set by the CEC message (30M3), the audio reproduction capability of the two channels determined in advance by the output audio setting unit 105-1 is used as the audio reproduction capability information in the decoding unit 106.
- the decoding unit 106 decodes the video stream based on the video playback capability information input from the EDD information acquisition unit 103 for video.
- the decoding unit 106 decodes the audio stream based on the latest reproduction capability information among the audio reproduction capability information input from the EDD information acquisition unit 103 or from the output audio setting unit 105-1 regarding the audio. It will The decoding unit 106 outputs the decoded video and audio data to the TMDS encoding unit 107.
- the TMDS encoding unit 107 When instructed by the authentication / encryption unit 104, the TMDS encoding unit 107 encodes the video / audio output data input from the decoding unit 106 into data for TMDS transmission, and outputs the encoded data to the authentication / encryption unit 104. Output.
- the TMDS output unit 108 receives the encoded TM DS transmission data or unencrypted TMDS transmission data input from the authentication / encryption unit 104 as the HDMI-O UT unit 101. Output using the TMDS 101-3 line.
- FIG. 10 is a diagram showing the configuration of the audio output device according to the first embodiment of the present invention, and the AV amplifier 20 corresponds to the audio output device.
- the AV amplifier 20 includes an HDMI-OUT unit 201, an HPD switching detection unit 202, an EDD information acquisition unit 203, an authentication / encryption unit 204, a CEC device cooperation unit 205, and a TMDS output unit 206.
- the HDMI-OUT unit 201 is an HDMI output port.
- the HDMI-OUT unit 201 is HDMI-connected to the TV 30, and performs transmission of video and audio data and bidirectional communication of control messages.
- the H DMI OUT unit 201 includes an HPD signal 201 1, a DDC signal 201 2, and a TMDS signal 201. -3 and CEC signal 201-4 used to transmit signals.
- the HDMI-OUT unit 201 is not limited to the HDMI. For example, regardless of wired or wireless communication, an interface corresponding to an adapted communication method may be provided to provide the same function.
- the HPD switching detection unit 202 detects high-to-low and low-to-high switching of the HPD signal 201-1 input from the HDMI-OUT unit 201, and notifies the EDD information acquisition unit 203.
- the EDD information acquisition unit 203 reads out the EDID of the TV 30 using the DDC signal 201-2 when receiving notification of detection of switching to Low or High of the HPD signal.
- the EDID describes a video / audio supportable format set by the TV 30.
- the EDD information acquisition unit 203 inputs the reproduction capability information of the video and audio into the EDID setting unit 208.
- the EDID of the TV 30 also describes that the TV 30 is an HDMI device, and the EDID information acquisition unit 203 instructs the authentication / encryption unit 204 to apply HDCP authentication to the HDMI device.
- the EDD information acquisition unit 203 only specifies to perform authentication on the HDMI device, and does not instruct start of authentication! /.
- the EDD information acquisition unit 203 instructs the authentication / encryption unit 204 to stop the HDCP authentication when it receives the notification of detection of switching from High to Low of the HPD signal.
- authentication / encryption unit 204 determines whether TV 30 is a device that is properly compatible with HDCP, by means of DDC, in combination with DDC, Use signal 201-2 to implement the HDCP authentication protocol. Since the TM DS output is required at the time of authentication, the authentication / encryption unit 204 outputs, to the TMDS output unit 206, data obtained by TMDS-encoding content that does not require copyright protection. Here, content data that does not require copyright protection indicates blackout video and the like.
- the authentication / encryption unit 204 instructs the authentication / decryption unit 212 to output the data for TMDS transmission, encrypts the input data for TMDS transmission using the successful authentication information, and Output to the DS output unit 206. If the authentication fails, the content that requires copyright protection can not be output, so the authentication / encryption unit 204 instructs the authentication / decryption unit 212 to stop the output of the TMDS transmission data.
- the CEC device linkage section 205 uses CEC signals 2014 and 207 4 to transmit a CEC message. Communicate with each other. Here, the description of the details of the CEC communication and the CEC message is omitted because it is not the gist of the present invention.
- the CEC device cooperation unit 205 recognizes the setting switching of the television mode / theater mode by CEC communication with the TV 30, and notifies the setting information to the EDID setting unit 208 and the authentication / decryption unit 212.
- the CEC device cooperation unit 205 has a reproduction capability setting unit 205-1, and the reproduction capability setting unit 205-1 receives a CEC message (30M1) instructing the audio reproduction capability switching setting from the TV 30, and sends it to the TV 30.
- the reproduction capability setting unit 205-1 inputs, to the EDID setting unit 208, switching mode / fixed mode information of the CEC message (30 M 1) for specifying the audio reproduction capability switching setting.
- the TMDS output unit 206 of the HDMI-OU T unit 201 receives the encoded TM DS transmission data or unencrypted TMDS transmission data input from the authentication / encryption unit 204. Output using the TMDS 201-3 line.
- the HDMI-IN unit 207 is an HDMI input port, and in the present embodiment, is HDMI-connected to the DVD recorder 10 and performs reception of video and audio data and bidirectional communication of control messages.
- the HDMI-IN unit 207 is used to transmit the HPD signal 207-1, DDC signal 207-2, TMDS signal 207-3, and CEC signal 207-4.
- the HDMI-IN unit 207 is not limited to the HDMI.
- an interface corresponding to an adapted communication scheme may be provided to provide the same function.
- EDID setting unit 208 receives video / audio reproduction capability information from EDD information acquisition unit 203, and receives setting information from television set / theater mode set from CEC device cooperation unit 205. Determine the description content of EDID 209 based on and change it if necessary.
- the audio reproduction capability information of the EDID 209 is the same as the audio reproduction capability of the TV 30 in the case of the television mode 2 It is set to channel PCM, and in the case of theater mode it is set to 6 channel PCM, which is the sound reproduction capability of its own device.
- the switching mode is designated from the reproduction capability setting unit 205-1 and / or when the setting information of the television mode / theater mode is inputted from the CEC device cooperation unit 205, it is inputted.
- the description content of EDID 210 is determined, and if necessary, it is changed.
- the setting contents of the EDID 210 are not changed even if the setting information of the television mode / theater mode is input from the CEC device cooperation unit 205.
- the EDID setting unit 208 issues an HPD pulse instruction to the HPD control unit 210 when the video / audio reproduction capability information is input from the EDD information acquisition unit 203 and when the description content of the EDID 209 is changed.
- video / audio reproduction capability information is set based on the input of the EDID setting unit 208.
- the HPD control unit 210 When the HPD control unit 210 receives an HPD pulse instruction from the EDID setting unit 208, the HPD control unit 210 temporarily lowers the HPD signal 207-1 to 100 ms or more and then pulls it to high again.
- the TMDS input unit 211 inputs TMDS data using the TMDS signal 207-3 of the HDMI-IN unit 207, and outputs the TMDS data to the authentication / decryption unit 212.
- Authentication / decryption unit 212 causes DVD recorder 10 to use DDC signal 207-2 and start an authentication protocol in order to confirm whether AV amplifier 20 is a device that is properly compatible with HDCP. Respond to When the authentication is started, the authentication / decryption unit 212 instructs the authentication / encryption unit 204 to start HDCP authentication with the TV 30. Since the TMDS input is necessary at the time of the authentication response, the authentication / decryption unit 212 receives, from the TMDS input unit 211, unencrypted data for TMDS transmission which does not require copyright protection. Also, if the authentication is successful, TMDS transmission data encrypted using the successful authentication information is input from the TMDS input unit 211.
- the authentication / decryption unit 212 outputs the unencrypted data for TMDS transmission by decrypting the encrypted data for TMDS transmission.
- the authentication / decryption unit 212 transmits the decrypted data for TMDS transmission to the TMDS decoding unit 213 in the case of the theater mode based on the setting information of the television mode / theater mode input from the CEC device cooperation unit 205. In the case of the television mode, if the authentication / encryption unit 204 is instructed to input, the output is performed.
- the TMDS decoding unit 213 performs TMDS decoding on data for TMDS transmission, and outputs an audio stream to the audio output unit 214.
- Audio output unit 214 is a speaker unit and outputs audio.
- FIG. 11 is a diagram showing the configuration of a video and audio output apparatus according to the first embodiment of the present invention.
- a TV 30 as an audio / video output device.
- the TV 30 includes an HDMI-IN unit 301, an EDID setting unit 302, an EDID 303, and an HPD control unit.
- a TMDS input unit 305 an authentication / decryption unit 306, a CEC device cooperation unit 307, a TMD S decoding unit 308, a video output unit 309, and an audio output unit 310.
- the HDMI-IN unit 301 is an HDMI input port.
- the HDMI-IN unit 301 is HDMI-connected to the AV amplifier 20 and performs reception of video and audio data and bidirectional communication of control messages.
- the HDMI-IN unit 301 is used to transmit the HPD signal 301-1, the DDC signal 301-2, the TMDS signal 301-3 and the CEC signal 301-4.
- the HDMI-IN unit 301 is not limited to the HDM I, and for example, an interface corresponding to an adapted communication method may be provided to provide the same function regardless of wired or wireless! /.
- the EDID setting unit 302 determines and sets the description content of the EDID 303, for example, when the power is turned on.
- the audio reproduction capability is set to be 2-channel PCM. If the contents described in EDID 03 03 are set, the HPD control unit 304 is instructed to raise the HPD to High.
- video / audio reproduction capability information is set based on the input of the EDID setting unit 302.
- the HPD control unit 304 raises the HPD signal 301-1 to High when the EDID setting unit 302 issues an instruction to raise the HPD signal to High.
- the TMDS input unit 305 inputs TMDS data using the TMDS 301-3 signal line of the HDMI-IN unit 301, and outputs the TMDS data to the authentication / decryption unit 306.
- Authentication / decryption unit 306 responds to an authentication protocol that AV amplifier 20 starts using DDC signal 301-2 in order to confirm whether TV 30 is a device that is properly compatible with HDCP. Do. Since the TMDS input is required at the time of the authentication response, the authentication / decryption unit 306 receives, from the TMDS input unit 305, unencrypted data for TMDS transmission which does not require copyright protection. Also, if the authentication is successful, TMDS transmission data encrypted using the successful authentication information is input from the TMDS input unit 305.
- the authentication / decryption unit 306 decrypts the decrypted data for TMDS transmission, and outputs the unencrypted data for TMDS transmission to the TMDS decoding unit 308.
- the CEC device cooperation unit 307 exchanges CEC messages using the CEC signal 301-4. Here, the details of the CEC communication and the CEC message are omitted because they are not the gist of the present invention.
- the CEC device cooperation unit 307 executes setting switching of the television mode / theater mode by CEC communication with the DVD recorder 10 or the AV amplifier 20.
- the CEC device cooperation unit 307 has a reproduction capability setting unit 307-1, and the reproduction capability setting unit 307-1 transmits, to the AV amplifier 20, a CEC message (30M1) for specifying the audio reproduction capability switching setting, Receive a CEC message (20M2) to notify the switching setting of the audio reproduction capability from the AV amplifier 20. Also, the reproduction capability setting unit 307-1 transmits a CEC message (30M3) specifying the output audio format to the DVD recorder 10, and receives a message (10M4) notifying the output audio format setting from the DVD recorder 10 Do.
- the TMDS decoding unit 308 TMDS decodes the data for TMDS transmission, and outputs the video stream to the video output unit 309 and the audio stream to the audio output unit 310.
- a video output unit 309 is a display unit, and outputs a video.
- the sound output unit 310 is a speaker unit and outputs sound.
- the video and audio reproduction device can be any type by specifying the audio format that can be output by the audio reproduction device by the command notification by the control message. At the timing, the output audio without stopping the content transmission can be adjusted to the optimal output audio format.
- the audio output device does not switch the reproduction capability information by the command notification by the control message, the audio output device does not have to make the video and audio reproduction device read the audio reproduction capability information, Since the occurrence of the stop of the content transmission accompanying it is eliminated, it can be switched to the transmission of appropriate audio data without interruption of the video.
- an audio format that can be output by the video / audio reproduction device is specified by an instruction / notification by a control message.
- the audio playback capability has changed due to a change in the audio output device among the HDMI output devices connected to the video and audio playback device.
- the video and audio output device does not switch the data reproduction capability information to be read out to the video and audio reproduction device. Therefore, the video and audio output device does not need to switch (pulse) the HPD signal from low to high for the video and audio reproduction device, so the video and audio reproduction device does not have to perform HDCP authentication again. Therefore, it is possible to have the video and audio reproduction apparatus switch to transmission of appropriate audio data without interruption of video.
- FIG. 12 shows an example of a video and audio data reproduction method with HDMI connection according to the second embodiment of the present invention.
- the HDMI connection configuration is the same as in FIG.
- the DVD recorder 10, the AV amplifier 21, the TV 31, the EDID 31C, and the HPD signal 31P are the same as in FIG. 5 and FIG.
- the audio reproduction capability information 31C1 of the TV 31 is the same as that in FIG.
- the DVD recorder 10 has to be switched to the sound output of 5.
- One-channel surround sound when switching from the television mode in which the sound is output from the TV 31 to the theater mode in which the sound is output from the AV amplifier 21 (31 V), to reproduce the surround sound of the 5.1 channel from the AV amplifier 21.
- the DVD recorder 10 has to be switched to the sound output of 5.
- One-channel surround sound when switching from the television mode in which the sound is output from the TV 31 to the theater mode in which the sound is output from the AV amplifier 21 (31 V), to reproduce the surround sound of the 5.1 channel from the AV amplifier 21.
- the DVD recorder 10 has to be switched to the sound output of 5.
- One-channel surround sound when switching from the television mode in which the sound is output from the TV 31 to the theater mode in which the sound is output from the AV amplifier 21 (31 V), to reproduce the surround sound of the 5.1 channel from the AV amplifier 21.
- the DVD recorder 10 has to be switched to the sound output of 5.
- the TV 31 first requests acquisition of the audio reproduction capability of the AV amplifier 21 (31M1). This request is transmitted, for example, using a CEC message and a Vend or Command> command.
- the AV amplifier 21 When the AV amplifier 21 receives an acquisition request (31M1) for the sound reproduction capability from the TV 31, the AV amplifier 21 notifies the TV 31 of the sound reproduction capability (21M2). This notification is transmitted, for example, using a CEC message and Vendor Command> command, and the audio reproduction capability of the AV amplifier 21 is described.
- the TV 31 instructs the AV amplifier 21 to switch to the theater mode (31 V), and the AV amplifier 21 starts audio output.
- the switching from the television mode to the theater mode and the operation thereof are not the gist of the present invention, so detailed description will be omitted.
- the TV 31 does not have to pulse the HPD signal 31P. Therefore, the DVD recorder 10 can continue outputting the content as it is without having to start HDCP authentication in order to confirm whether the TV 31 is a proper device.
- the TV 31 instructs the DVD recorder 10 to output audio format (30M3).
- This instruction is transmitted, for example, using a Vendor Command> command of a CEC message, and a mode designation indicating whether to use the reproduction capability of the AV amplifier 21 and a sound reproduction capability of the AV amplifier 21 are described. .
- the audio reproduction capability of the AV amplifier 21 described here has the same configuration and content as those notified from the AV amplifier 21 to the TV 31 in the notification (21M2) of the audio reproduction capability.
- the mode setting indicating whether to use the reproduction capability of the AV amplifier 21 is the same as in the first embodiment, the shutter mode in which the reproduction capability of the AV amplifier 21 is used, and the television mode when it is not used. Mode.
- the DVD recorder 10 When receiving the output audio format instruction (30M3) from the TV 31, the DVD recorder 10 sends an output audio format setting notification (10M4) to the TV 31.
- This notification is transmitted, for example, using a ⁇ Vendor Command> command of a CEC message, and describes the valid state of the mode in the DVD recorder 10 (whether the setting is the television mode or the theater mode).
- the television mode is set by permitting the instruction from the TV 31 in the DVD recorder 10.
- the television mode setting is notified from the DVD recorder 10 to the TV 31, and the DVD recorder 10 outputs PCM audio of two channels which has been determined in advance as an audio format in the television mode.
- the theater mode setting is notified to the DVD recorder 10, the TV 31.
- the DVD recorder 10 selects an appropriate one from the audio reproduction capabilities included in the output audio format instruction (30M3), and uses it as the audio format of the output audio.
- the audio format of the audio data recorded on the DVD being played back is Dolby Digital of 5 ⁇ 1 channel and it is included in the audio playback capability included in the output audio format instruction (30M3). If Dolby Digital is included, use Dolby Digital as a 5 ⁇ 1 channel random number as the audio format of the output audio. Therefore, the DVD recorder 10 can adjust to the optimal output audio format regardless of the description of the audio reproduction capability information 31C2 of the EDID 31C of the TV 31.
- FIG. 13 is a diagram showing the configuration of the audio output device according to the second embodiment of the present invention, and the AV amplifier 21 corresponds to the audio output device.
- the processing units given the same numbers as in FIG. 10 perform the same operations as in the first embodiment.
- AV amplifier 21 has an optical digital audio IN section in addition to the configuration of AV amplifier 20 shown in FIG.
- An audio output unit 215 is provided instead of the audio output unit 214.
- the optical digital audio IN unit 216 is an optical digital audio input port, and in the present embodiment, is connected to the TV 31 with an optical digital audio cable, and receives audio data from the TV 31.
- the sound output unit 215 is a speaker unit, and outputs the sound received from the TMDS decoding unit 213 or the optical digital sound IN unit 216.
- FIG. 14 is a diagram showing the configuration of a video and audio output device according to the second embodiment of the present invention, and the TV 31 corresponds to the video and audio output device.
- the processing units given the same numbers as in FIG.
- the TV 31 has an optical digital audio OUT unit 311.
- the optical digital audio OUT unit 311 is an optical digital audio output port, and in the present embodiment, it is connected to the AV amplifier 21 by an optical digital audio cable, and transmission of audio data output from the TMDS decoding unit 308 is performed. Do.
- the video and audio reproduction device can be arbitrarily selected by designating the audio format that can be output by the audio reproduction device by the command notification by the control message. At the timing, the output audio without stopping the content transmission can be adjusted to the optimal output audio format.
- the video and audio output device since the video and audio output device does not switch the reproduction capability information, the video and audio output device does not need to have the video and audio reproduction device read the audio reproduction capability information. There is no need to stop the transmission of content. Therefore, it is possible to have the video and audio reproduction apparatus switch to transmission of appropriate audio data without interruption of video.
- the TV 31 may transmit a predetermined audio reproduction capability which is not equal to the audio reproduction capability of the AV amplifier 21. In this case, the TV 31 may not transmit the acquisition request (31M1) of the sound reproduction capability to the AV amplifier 21. Alternatively, when the TV 31 can not acquire the audio reproduction capability of the AV amplifier 21, the TV 31 may transmit a predetermined audio reproduction capability. In any case, the TV 31 needs to know in advance some or all of the audio reproduction capabilities of the AV amplifier 21.
- the switching from the theater mode to the television mode has been described in the first embodiment, the switching from the television mode to the theater mode can also be performed in the same manner. Further, in the second embodiment, the switching from the television mode to the theater mode has been described, but the switching from the theater mode to the television mode can be similarly performed.
- the present invention can be applied to a method of reproducing video and audio data from a video and audio reproducing device such as a DVD recorder, and in particular, the devices are connected by one-way data connection, and messages are bi-directionally between communication devices. It can be applied as a method of reproducing video and audio data in a device connected to a network such as home entertainment 'network to be exchanged.
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US12/518,769 US7933485B2 (en) | 2006-12-14 | 2007-12-13 | Audio-video output device, audio output device, audio-video reproduction device, audio-video data reproduction system, and audio-video data reproduction method |
EP07850552.6A EP2104351B1 (en) | 2006-12-14 | 2007-12-13 | Audio-video output device, audio output device, audio-video reproduction device, audio-video data reproduction system, and audio-video data reproduction method |
CN200780046022XA CN101558646B (zh) | 2006-12-14 | 2007-12-13 | 影像声音输出装置、声音输出装置、影像声音再生装置、影像声音数据再生系统及影像声音数据再生方法 |
JP2008529070A JP4221446B2 (ja) | 2006-12-14 | 2007-12-13 | 映像音声出力機器、音声出力機器、映像音声再生機器、映像音声データ再生システム及び映像音声データ再生方法 |
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US20110052141A1 (en) | 2011-03-03 |
CN101558646B (zh) | 2012-01-04 |
EP2104351A4 (en) | 2012-09-12 |
CN101558646A (zh) | 2009-10-14 |
EP2104351A1 (en) | 2009-09-23 |
JP4221446B2 (ja) | 2009-02-12 |
EP2104351B1 (en) | 2014-08-06 |
JPWO2008072695A1 (ja) | 2010-04-02 |
US7933485B2 (en) | 2011-04-26 |
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