WO2016163327A1 - 送信装置、送信方法、受信装置および受信方法 - Google Patents
送信装置、送信方法、受信装置および受信方法 Download PDFInfo
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Definitions
- the present invention relates to a transmission device, a transmission method, a reception device, and a reception method, and more particularly to a transmission device that handles a plurality of encoded data having priority information.
- Patent Document 1 describes an object-based audio mixing technique.
- Object-based audio realizes stereophonic sound by supplying individual object sound sources without mixing and rendering on the playback device side.
- the encoded stream of object-based audio includes encoded data of a plurality of object sound sources.
- the encoded data of each object sound source is composed of metadata such as position information on the coordinate axes in addition to sound data. It is also conceivable to give priority information indicating the priority at the time of decoding to the encoded data of each object sound source.
- This technique is to enable the optimum decoding process to be applied to an encoded stream including a plurality of encoded data having priority information.
- a stream acquisition unit for acquiring an encoded stream including a plurality of encoded data having priority information;
- a decoding unit that performs a decoding process on the encoded stream acquired by the stream acquisition unit to generate a decoded stream including decoded data;
- a determination unit that determines whether or not the receiving side decoding capability is equal to or higher than its own decoding capability based on the receiving side decoding capability information indicating to what order priority decoding is possible;
- the transmission apparatus includes a transmission unit that transmits the decoded stream generated by the decoding unit.
- the stream acquisition unit acquires an encoded stream including a plurality of encoded data having priority information.
- the decoding unit performs a decoding process on the encoded stream acquired by the stream acquisition unit, and generates a decoded stream including decoded data.
- the encoded stream is an encoded audio stream of object-based audio including encoded data of a plurality of object sound sources having priority information, and the decoding unit decodes the encoded audio stream acquired by the stream acquisition unit. It is also possible to generate a decoded audio stream including a predetermined number of channels of audio data as decoded data.
- the determination unit determines whether or not the decoding capability on the receiving side is equal to or higher than its own decoding capability based on the decoding capability information on the receiving side indicating to what order of priority decoding is possible.
- the information processing unit may further include an information receiving unit that receives the decoding capability information on the receiving side from the receiving side via the digital interface.
- the transmission unit transmits the encoded stream acquired by the stream acquisition unit or the decoded stream generated by the decoding unit to the reception side via the digital interface.
- the digital interface may be HDMI.
- the determination unit determines that the decoding capability on the reception side is equal to or higher than its own decoding capability, the encoded stream is transmitted, and the decoding capability on the reception side is higher than its own decoding capability in the determination unit. If it is determined that it is not, the decoded stream is transmitted.
- the encoded stream is transmitted, and when the receiving side decoding capability is not equal to or higher than its own decoding capability, decoding is performed.
- the transmitted stream is transmitted, and the optimum decoding process can be applied to the encoded stream.
- An information transmission unit that transmits its own decoding capability information indicating to what priority level it can be decoded to the transmission side via a digital interface; Decoding having a coded stream including a plurality of pieces of coded data having priority information or decoded data generated by performing a decoding process on the coded stream from the transmission side via the digital interface A receiving unit for receiving the digitized stream; When the encoded stream is received by the reception unit, the reception apparatus includes a decoding unit that performs a decoding process on the encoded stream and generates a decoded stream including decoded data.
- the information transmitting unit transmits its own decoding capability information indicating to what priority level decoding is possible to the transmitting side via the digital interface.
- the digital interface may be HDMI.
- the reception unit transmits the encoded stream including a plurality of pieces of encoded data having priority information or the decoded data generated by performing a decoding process on the encoded stream from the transmission side via the digital interface.
- a decrypted stream is received.
- the decoding unit performs a decoding process on the encoded stream to generate a decoded stream including decoded data.
- the encoded stream is an encoded audio stream of object-based audio including encoded data of a plurality of object sound sources having priority information, and the decoded stream is subjected to decoding processing on the encoded audio stream.
- the predetermined number of channels of audio data generated as described above may be included as decoded data.
- the decoding capability information of the receiver is transmitted to the transmitting side via the digital interface, and the decoding capability of the receiving side is based on the decoding capability information on the transmitting side. If the receiving side decoding capability is equal to or higher than its own decoding capability, an encoded stream is transmitted, and the receiving side decoding capability is not higher than its own decoding capability. In some cases, the decoded stream can be transmitted, and the optimum decoding process can be applied to the encoded stream.
- FIG. 1 shows a configuration example of an AV (Audio Visual) system 10 as an embodiment.
- the AV system 10 includes a BD (Blu-Ray Disc) player 100 as a source device, an audio amplifier 200 as a repeater device, and a television receiver 300 as a sink device.
- a multi-channel speaker system 400 is connected to the audio amplifier 200.
- the BD player 100 and the audio amplifier 200 are connected via an HDMI cable 510.
- the BD player 100 is provided with an HDMI terminal 101 to which an HDMI transmission unit (HDNI TX) 102 is connected.
- the audio amplifier 200 is provided with an HDMI terminal 201a to which an HDMI receiving unit (HDMI RX) 202a is connected.
- One end of the HDMI cable 510 is connected to the HDMI terminal 101 of the BD player 100, and the other end is connected to the HDMI terminal 201 a of the audio amplifier 200.
- the audio amplifier 200 and the television receiver 300 are connected via an HDMI cable 520.
- the audio amplifier 200 is provided with an HDMI terminal 201b to which an HDMI transmission unit (HDMI TX) 202b is connected.
- the television receiver 100 is provided with an HDMI terminal 301 to which an HDMI receiving unit (HDMI RX) 302 is connected.
- HDMI cable 520 is connected to the HDMI terminal 201 b of the audio amplifier 200, and the other end is connected to the HDMI terminal 301 of the television receiver 300.
- HDMI is a registered trademark.
- FIG. 2 shows a configuration example of the BD player 100.
- the BD player 100 includes an HDMI terminal 101 and an HDMI transmission unit 102.
- the BD player 100 includes an internal bus 103, a CPU (Central Processing Unit) 104, a flash ROM (Read Only Memory) 105, an SDRAM (Synchronous Random Access Memory) 106, a display control unit 107, and a remote control reception. Part 108 and a remote control transmitter 109.
- CPU Central Processing Unit
- flash ROM Read Only Memory
- SDRAM Synchronous Random Access Memory
- the BD player 100 includes a storage (recording) medium control interface 111, a BD (Blu-Ray Disc) drive 112, an HDD (Hard disc drive) 113, an SSD (Solid State Drive) 114, and an Ethernet interface (Ethernet). I / F) 115 and a network terminal 116.
- BD Blu-Ray Disc
- HDD Hard disc drive
- SSD Solid State Drive
- Ethernet interface Ethernet interface
- the BD player 100 also includes a demultiplexer 121, a video decoder 122, a graphic generation circuit 123, a video output terminal 124, a panel drive circuit 125, a display panel 126, an audio decoder 127, a selection unit 128, An audio output terminal 129 is provided. Further, the BD player 100 has a power supply unit 131.
- the power supply unit 131 supplies power to each unit of the BD player 100.
- the power supply unit 131 may be an AC power supply or a battery (storage battery, dry battery).
- CPU 104 controls the operation of each unit of the BD player 100.
- the flash ROM 105 stores control software and data.
- the SDRAM 106 constitutes a work area for the CPU 104.
- the CPU 104 develops software and data read from the flash ROM 105 on the SDRAM 106 and activates the software to control each unit of the BD player 100.
- the remote control receiving unit 108 receives a remote control signal (remote control code) transmitted from the remote control transmitter 109 and supplies it to the CPU 104.
- the CPU 104 controls each part of the BD player 100 according to the remote control code.
- the remote control unit is shown as the user instruction input unit.
- the user instruction input unit has other configurations, for example, a switch, a wheel, a touch panel unit for inputting an instruction by proximity / touch, a mouse It may be a keyboard, a gesture input unit for detecting an instruction input with a camera, a voice input unit for inputting an instruction by voice, or the like.
- the BD drive 112 records content data on a BD disc as a disc-shaped recording medium or reproduces content data from the BD disc.
- the HDD 113 records content data or reproduces the content data.
- the SSD 114 records content data in a semiconductor memory such as a memory card or reproduces content data from the semiconductor memory.
- the BD drive 112, HDD 113, and SSD 114 are connected to the internal bus 103 via the storage medium control interface 111.
- a SATA interface is used as an interface for the BD drive 112 and the HDD 113.
- a SATA interface or a PCIe interface is used as an interface for the SSD 114.
- the network terminal 116 is a terminal connected to the network, and is connected to the Ethernet interface 115.
- the Ethernet interface 115 makes a network connection via the network terminal 116.
- the demultiplexer 121 extracts an encoded video stream and an encoded audio stream from the multiplexed stream that is content data reproduced by the BD drive 112, the HDD 113, or the SSD 114.
- the video decoder 122 performs a decoding process on the encoded video stream to obtain uncompressed image data.
- the graphic generation circuit 123 performs graphics data superimposition processing on the image data obtained by the video decoder 122 as necessary.
- the video output terminal 124 outputs the image data output from the graphic generation circuit 123.
- the panel drive circuit 125 drives the display panel 126 based on the image data output from the graphic generation circuit 123.
- the display control unit 107 controls the display on the display panel 126 by controlling the graphics generation circuit 123 and the panel drive circuit 125.
- the display panel 126 includes, for example, an LCD (Liquid Crystal Display), a PDP (Plasma Display Panel), an organic EL panel (Organic Electro-Luminescence Panel), and the like.
- the display control unit 107 may directly control the display on the display panel 126.
- the CPU 104 and the display control unit 107 may be a single chip or a plurality of cores.
- the audio decoder 127 performs a decoding process on the encoded audio stream extracted by the demultiplexer 121 to obtain uncompressed audio data.
- the encoded audio stream is an object-based audio encoded audio stream including encoded data of a plurality of object sound sources having priority information.
- the encoded data of each object sound source is composed of metadata such as position information on the coordinate axes in addition to sound data.
- the audio decoder 127 performs a decoding process on the encoded audio stream, obtains a predetermined number of channels of uncompressed audio data, and generates a decoded audio stream including the predetermined number of channels of uncompressed audio data. To do.
- the audio output terminal 129 outputs uncompressed audio data of a predetermined number of channels obtained by the audio decoder 127.
- the number of channels of uncompressed audio data output to the audio output terminal 129 may be different from the number of channels of uncompressed audio data included in the decoded audio stream.
- the number of channels of uncompressed audio data included in the decoded audio stream is “6” for 5.1 channels
- the number of channels of uncompressed audio data output to the audio output terminal 129 is For example, “2” for stereo.
- the audio decoder 127 performs the decoding process on the encoded audio stream within the range of its own decoding capability. That is, the audio decoder 127 encodes a predetermined number of object sound sources having a priority included in a range up to a priority that can be decoded by a plurality of object sound sources included in the encoded audio stream. The decoded data is subjected to a decoding process to obtain a predetermined number of channels of uncompressed audio data.
- the selection unit 128 is an encoded audio stream extracted by the demultiplexer 121 or a decoded audio stream generated by the audio decoder 127 as an audio stream to be transmitted to the receiving side via the HDMI digital interface. Take out.
- the CPU 104 determines whether or not the decoding capability of the reception side is based on the reception side decoding capability information, that is, information indicating to what priority the audio amplifier 200 can decode in the reception side, in this embodiment. It is determined whether or not the decoding capability is exceeded. In this embodiment, the CPU 104 receives the decoding capability information on the receiving side from the receiving side through the HDMI digital interface.
- FIG. 3 shows an example of the structure of the decoding capability information on the receiving side.
- the decoding capability information is 8-bit information as a whole, but as shown in FIG. 3B, the lower 4 bits from the third bit to the 0th bit are substantially the same. Information. For example, “0000” indicates that decoding for an encoded audio stream of object-based audio is not supported.
- “0001” indicates that only priority 1 can be decoded, that is, only encoded data of an object sound source having priority 1 can be decoded.
- “0010” indicates that decoding up to priority 2 is possible, that is, decoding of encoded data of an object sound source having priorities 1 and 2 is possible. The same applies hereinafter.
- the CPU 104 controls the selection unit 128 to extract the encoded audio stream when determining that the receiving side decoding capability is higher than its own decoding capability. Further, when the CPU 104 determines that the receiving side decoding capability is not equal to or higher than its own decoding capability, the CPU 104 controls the selection unit 128 to extract the decoded audio stream. By controlling in this way, it is possible to apply an optimal decoding process to the encoded audio stream.
- the flowchart in FIG. 4 shows an example of a control processing procedure in the CPU 104.
- the CPU 104 starts determination processing.
- the CPU 104 receives the decoding capability information on the reception side (see FIG. 3) from the reception side through the HDMI digital interface.
- the decoding capability information is recorded as one of EDID (ExtendedEDDisplay Identification Data) on the receiving side.
- the CPU 104 reads out the EDID through a DDC (DisplayEDData Channel) channel to obtain the decoding capability information on the receiving side.
- DDC DisplayEDData Channel
- step ST3 the CPU 104 determines whether or not the receiving side supports decoding of the encoded audio stream of object-based audio.
- step ST4 the CPU 104 determines whether or not the receiving side decoding capability is equal to or higher than its own decoding capability.
- the CPU 104 When the decoding capability on the receiving side is equal to or higher than its own decoding capability, the CPU 104 outputs an encoded audio stream in step ST5 and controls the selection unit 128 to extract the encoded audio stream. Thereafter, in step ST6, the CPU 104 ends the control process.
- step ST7 When the receiving side does not support decoding of the encoded audio stream of object-based audio in step ST3, or when the decoding capability of the receiving side is not equal to or higher than its own decoding capability in step ST4, the CPU 104 performs step ST7. , The decoded audio stream is output, and the selection unit 128 controls to extract the decoded audio stream. Thereafter, in step ST6, the CPU 104 ends the control process.
- the HDMI transmission unit 102 transmits the uncompressed image data obtained by the video decoder 122 and the audio stream extracted by the selection unit 128 from the HDMI terminal 101 by communication conforming to HDMI. .
- the HDMI transmission unit 102 packs the image data and the audio stream and outputs them to the HDMI terminal 101 for transmission through the HDMI TMDS channel. Details of the HDMI transmission unit 102 will be described later.
- the operation of the BD player 100 shown in FIG. 2 will be briefly described.
- content data to be recorded is acquired via a digital tuner (not shown) or from the network terminal 116 via the Ethernet interface 115.
- This content data is input to the storage medium control interface 111 and recorded on the BD disc by the BD drive 112, on the HDD 113, or on the semiconductor memory by the SSD 114.
- a multiplexed stream that is content data reproduced by the BD drive 112, HDD 113, or SSD 114 is supplied to the demultiplexer 121 via the storage medium control interface 111.
- the demultiplexer 121 an encoded video stream and an encoded audio stream are extracted from the multiplexed stream.
- the encoded video stream extracted by the demultiplexer 121 is supplied to the video decoder 122.
- the video decoder 122 performs a decoding process on the encoded video stream to obtain non-compressed image data.
- the image data is output to the video output terminal 124 after the graphics generation circuit 123 performs graphics data superimposition processing or the like as necessary.
- image data is supplied from the graphic generation circuit 123 to the panel drive circuit 125, and a reproduced image is displayed on the display panel 126.
- This encoded audio stream extracted by the demultiplexer 121 is supplied to the audio decoder 127.
- This encoded audio stream is an object-based audio encoded audio stream including encoded data of a plurality of object sound sources having priority information.
- the audio decoder 127 performs a decoding process on the encoded audio stream to obtain a predetermined number of channels of uncompressed audio data, and also includes decoded audio data including the predetermined number of channels of uncompressed audio data. A stream is generated. Uncompressed audio data of a predetermined number of channels generated by the audio decoder 127 is output to the audio output terminal 129.
- the encoded audio stream extracted by the demultiplexer 121 is supplied to the selection unit 128.
- the selection unit 128 is also supplied with the decoded audio stream generated by the audio decoder 127. Under the control of the CPU 104, the selection unit 128 extracts an encoded audio stream or a decoded audio stream as an audio stream to be transmitted to the receiving side via HDMI.
- the CPU 104 determines whether or not the decoding capability on the receiving side is equal to or higher than its own decoding capability based on the decoding capability information on the receiving side (information indicating what order of priority can be decoded). Based on the determination result, the selection unit 128 is controlled. When the decoding capability on the receiving side is equal to or higher than its own decoding capability, the selection unit 128 extracts the encoded audio stream. On the other hand, when the decoding capability on the receiving side is not equal to or higher than its own decoding capability, the selection unit 128 extracts a decoded audio stream.
- the audio stream extracted by the selection unit 128 is supplied to the HDMI transmission unit 102 and the video decoder 122 is used.
- the uncompressed image data obtained in the above is supplied to the HDMI transmission unit 102.
- these image data and audio stream are packed and output to the HDMI terminal 101.
- FIG. 5 shows a configuration example of the audio amplifier 200.
- the audio amplifier 200 includes HDMI terminals 201a and 201b, an HDMI receiving unit 202a, and an HDMI transmitting unit 202b.
- the audio amplifier 200 includes an audio decoder 221, a selection unit 222, an audio processing circuit 223, an audio amplification circuit 224, and an audio output terminal 225.
- the audio amplifier 200 includes an internal bus 203, a CPU 204, a flash ROM 205, an SDRAM 206, a display control unit 207, a panel drive circuit 208, a display panel 209, a remote control reception unit 210, and a remote control transmitter 211.
- the power supply unit 212 is included.
- the CPU 204, flash ROM 205, SDRAM 206, and display control unit 207 are connected to the internal bus 203.
- the CPU 204 controls the operation of each part of the audio amplifier 200.
- the flash ROM 205 stores control software and data.
- the SDRAM 206 constitutes a work area for the CPU 204.
- the CPU 204 develops software and data read from the flash ROM 205 on the SDRAM 206 and activates the software to control each unit of the audio amplifier 200.
- the remote control receiving unit 210 receives a remote control signal (remote control code) transmitted from the remote control transmitter 211 and supplies it to the CPU 204.
- the CPU 204 controls each part of the audio amplifier 200 based on the remote control code.
- the remote control unit is shown as the user instruction input unit.
- the user instruction input unit has other configurations, for example, a switch, a wheel, a touch panel unit for inputting an instruction by proximity / touch, a mouse It may be a keyboard, a gesture input unit for detecting an instruction input with a camera, a voice input unit for inputting an instruction by voice, or the like.
- the display control unit 207 controls the display on the display panel 209 by controlling the panel drive circuit 208 in order to perform, for example, user interface display or status display of the audio amplifier 200.
- the display panel 209 includes, for example, an LCD (Liquid Crystal Display), an organic EL panel (Organic Electro-Luminescence Panel), and the like.
- the display control unit 207 is provided in addition to the CPU 204 is shown, but the display on the display panel 209 may be directly controlled by the CPU 204.
- the CPU 204 and the display control unit 207 may be a single chip or a plurality of cores.
- the power supply unit 212 supplies power to each unit of the audio amplifier 200.
- the power supply unit 212 may be an AC power supply or a battery (storage battery, dry battery).
- the HDMI receiving unit 202a receives uncompressed image data and an audio stream supplied to the HDMI terminal 201a via the HDMI cable by communication conforming to HDMI.
- This audio stream is an encoded audio stream of object-based audio including encoded data of a plurality of object sound sources having priority information, or a decoded audio stream including uncompressed audio data of a predetermined number of channels. Details of the HDMI receiving unit 202a will be described later.
- the audio decoder 221 When the audio stream received by the HDMI receiving unit 202a is an encoded audio stream, the audio decoder 221 performs a decoding process on the encoded audio stream to obtain uncompressed audio data having a predetermined number of channels. Then, a decoded audio stream including the predetermined number of channels of uncompressed audio data is generated.
- the selection unit 222 takes out the audio stream received by the HDMI receiving unit 202a or the decoded audio stream obtained by the audio decoder 221 under the control of the CPU 204. In this case, when the audio stream received by the HDMI receiving unit 202a is an encoded audio stream, the selection unit 222 extracts the decoded audio stream obtained by the audio decoder 221. In addition, when the audio stream received by the HDMI receiving unit 202a is a decoded audio stream, the selection unit 222 extracts the decoded audio stream.
- the audio processing circuit 223 extracts a predetermined number of channels of uncompressed audio data from the decoded audio stream extracted by the selection unit 222, and performs necessary processing such as D / A conversion. Note that the audio processing circuit 223 performs necessary up / down mix processing according to the configuration of the speaker system 400 to be connected, and obtains audio signals of the required number of channels.
- the audio amplification circuit 224 amplifies the audio signal of each channel obtained by the audio processing circuit 223 and outputs it to the audio output terminal 225. Note that the speaker system 400 is connected to the audio output terminal 225.
- the HDMI transmission unit 202b transmits the uncompressed image data received by the HDMI reception unit 202a and the decoded audio stream extracted by the selection unit 222 from the HDMI terminal 201b by communication conforming to HDMI.
- the HDMI transmission unit 202b packs the image data and the audio stream and outputs them to the HDMI terminal 201b for transmission via the HDMI TMDS channel. Details of the HDMI transmission unit 202b will be described later.
- the HDMI receiving unit 202a receives uncompressed image data and an audio stream (encoded audio stream or decoded audio stream) transmitted from the BD player 100 via the HDMI cable to the HDMI terminal 201a.
- the audio stream received by the HDMI receiving unit 202a is supplied to the audio decoder 221.
- the audio decoder 221 when the audio stream received by the HDMI receiving unit 202a is an encoded audio stream, the encoded audio stream is subjected to a decoding process so that uncompressed audio data of a predetermined number of channels is obtained. As a result, a decoded audio stream including the predetermined number of channels of uncompressed audio data is generated.
- the selection unit 222 extracts the audio stream received by the HDMI receiving unit 202a or the decoded audio stream obtained by the audio decoder 221 under the control of the CPU 204. In this case, when the audio stream received by the HDMI receiving unit 202a is an encoded audio stream, the selection unit 222 extracts the decoded audio stream obtained by the audio decoder 221. On the other hand, when the audio stream received by the HDMI receiving unit 202a is a decoded audio stream, the selection unit 222 extracts the decoded audio stream.
- the decoded audio stream is always extracted from the selection unit 222.
- the decoded audio stream is generated by the audio decoder 221 when its own decoding capability is equal to or higher than the decoding capability on the transmission side. Also, this decoded audio stream is generated by the audio decoder on the transmission side (see the audio decoder 127 in FIG. 2) when its own decoding capability is not higher than the decoding capability on the transmission side. Therefore, this decoded audio stream is obtained by applying an optimum decoding process to the encoded audio stream.
- the decoded audio stream extracted by the selection unit 222 is supplied to the audio processing circuit 223.
- the audio processing circuit 223 extracts a predetermined number of channels of uncompressed audio data from the decoded audio stream, and further performs necessary processing such as up / downmix, D / A conversion, etc. A signal is obtained.
- the audio signal of each channel output from the audio processing circuit 223 is amplified by the audio amplification circuit 224 and output to the audio output terminal 225. Therefore, a predetermined number of channels of audio output can be obtained from the speaker system 400 connected to the audio output terminal 225.
- the uncompressed image data received by the HDMI receiving unit 202a and the decoded audio stream extracted by the selecting unit 222 are supplied to the HDMI transmitting unit 202b.
- image data after processing such as superimposition of graphics data on the image data may be supplied to the HDMI transmitting unit 202b.
- the HDMI transmission unit 202b packs these image data and audio stream and outputs them to the HDMI terminal 201b.
- FIG. 6 shows a configuration example of the television receiver 300.
- the television receiver 300 includes an HDMI terminal 301 and an HDMI receiving unit 302.
- the television receiver 300 includes an internal bus 303, a CPU 304, a flash ROM 305, an SDRAM (Synchronous RAM) 306, a display control unit 307, a remote control reception unit 308, a remote control transmitter 309, and a power supply unit 310.
- the television receiver 300 includes an antenna terminal 321, a digital tuner 322, a demultiplexer 323, a video decoder 324, a video processing circuit 325, a graphic generation circuit 326, a panel drive circuit 327, and a display panel 328. Have.
- the television receiver 300 includes an audio decoder 329, an audio processing circuit 330, an audio amplification circuit 331, and a speaker 332.
- the CPU 304, flash ROM 305, SDRAM 306, display control unit 307, Ethernet interface 311, and demultiplexer 323 are connected to the internal bus 303.
- the CPU 304 controls the operation of each unit of the television receiver 300.
- the flash ROM 305 stores control software and data.
- the SDRAM 306 constitutes a work area for the CPU 304.
- the CPU 304 develops software and data read from the flash ROM 305 on the SDRAM 306 and activates the software to control each unit of the television receiver 300.
- the remote control receiving unit 308 receives the remote control signal (remote control code) transmitted from the remote control transmitter 309 and supplies it to the CPU 304.
- the CPU 304 controls each unit of the television receiver 300 based on the remote control code.
- the remote control unit is shown as the user instruction input unit.
- the user instruction input unit has other configurations, for example, a switch, a wheel, a touch panel unit for inputting an instruction by proximity / touch, a mouse It may be a keyboard, a gesture input unit for detecting an instruction input with a camera, a voice input unit for inputting an instruction by voice, or the like.
- the power supply unit 310 supplies power to each unit of the television receiver 300.
- the power supply unit 310 may be an AC power supply or a battery (storage battery, dry battery).
- the network terminal 312 is a terminal connected to the network, and is connected to the Ethernet interface 311.
- the Ethernet interface 311 performs network connection via the network terminal 312.
- the HDMI receiving unit 302 receives the uncompressed image data and the decoded audio stream supplied to the HDMI terminal 301 via the HDMI cable by communication conforming to HDMI.
- This decoded audio stream includes a predetermined number of channels of uncompressed audio data. Details of the HDMI receiving unit 302 will be described later.
- the antenna terminal 321 is a terminal for inputting a television broadcast signal received by a receiving antenna (not shown).
- the digital tuner 322 processes the television broadcast signal input to the antenna terminal 321 to obtain a multiplexed stream that is content data corresponding to the user's selected channel.
- the demultiplexer 323 extracts the encoded video stream and the encoded audio stream from the multiplexed stream obtained by the digital tuner 322.
- the video decoder 324 performs a decoding process on the encoded video stream to obtain uncompressed image data.
- the video processing circuit 325 and the graphic generation circuit 326 perform scaling processing (resolution conversion processing), graphics on image data obtained by the video decoder 324 or image data received by the HDMI receiving unit 302 as necessary. Performs data superimposition processing.
- the panel drive circuit 327 drives the display panel 328 based on the image data output from the graphic generation circuit 326.
- the display control unit 307 controls the display on the display panel 328 by controlling the graphics generation circuit 326 and the panel drive circuit 327.
- the display panel 328 includes, for example, an LCD (Liquid Crystal Display), a PDP (Plasma Display Panel), an organic EL panel (Organic Electro-Luminescence Panel), and the like.
- the display control unit 307 may directly control the display on the display panel 328.
- the CPU 304 and the display control unit 307 may be a single chip or a plurality of cores.
- the audio decoder 329 performs a decoding process on the encoded audio stream extracted by the demultiplexer 323 to obtain uncompressed audio data having a predetermined number of channels.
- the audio processing circuit 330 performs necessary processing such as up / downmix and D / A conversion according to the configuration of the speaker 332 on the uncompressed audio data of a predetermined number of channels obtained by the audio decoder 329, and the necessary processing. An audio signal having the number of channels is obtained.
- the audio processing circuit 330 extracts a predetermined number of channels of uncompressed audio data from the decoded audio stream received by the HDMI receiving unit 302, and performs up / down mixing or D / A conversion according to the configuration of the speaker 332 Necessary processing such as the above is performed to obtain a necessary number of channels of audio signals.
- the audio amplification circuit 331 amplifies the audio signal of each channel obtained by the audio processing circuit 330 and supplies it to the speaker 332.
- the speaker 332 may be monaural or stereo.
- the speaker 332 may be an earphone or a headphone.
- the speaker 332 may be compatible with multi-channels such as 2.1 channels and 5.1 channels.
- the speaker 332 may be connected to the television receiver 300 wirelessly.
- the speaker 332 may be another device.
- the HDMI receiving unit 302 receives uncompressed image data and a decoded audio stream transmitted to the HDMI terminal 301 from the audio amplifier 200 via the HDMI cable.
- the decoded audio stream includes uncompressed audio data of a predetermined number of channels. Uncompressed image data is supplied to the video processing circuit 325, and the decoded audio stream is supplied to the audio processing circuit 330.
- the television broadcast signal input to the antenna terminal 321 is supplied to the digital tuner 322.
- a television broadcast signal is processed, and a multiplexed stream that is content data corresponding to a user's selected channel is obtained.
- This multiplexed stream is supplied to the demultiplexer 323.
- the demultiplexer 323 extracts an encoded video stream and an encoded audio stream from the multiplexed stream.
- the encoded video stream is supplied to the video decoder 324.
- the video decoder 324 performs a decoding process on the encoded video stream to obtain uncompressed image data. This uncompressed image data is supplied to the video processing circuit 325.
- scaling processing resolution conversion processing
- graphics are performed on the image data obtained by the video decoder 324 or the image data received by the HDMI receiving unit 302 as necessary.
- Data superimposition processing is performed.
- the processed image data is supplied to the panel drive circuit 327, and an image corresponding to the image data is displayed on the display panel 328.
- the encoded audio stream extracted by the demultiplexer 323 is supplied to the audio decoder 329.
- the encoded audio stream is subjected to a decoding process, and uncompressed audio data having a predetermined number of channels is obtained.
- the predetermined number of channels of uncompressed audio data is supplied to the audio processing circuit 330.
- the audio processing circuit 330 necessary processing such as up / down mixing and D / A conversion according to the configuration of the speaker 332 is performed on the uncompressed audio data of a predetermined number of channels obtained by the audio decoder 329.
- the required number of audio signals can be obtained.
- this audio processing circuit 330 after extracting a predetermined number of channels of uncompressed audio data from the decoded audio stream received by the HDMI receiving unit 302, an up / down mix corresponding to the configuration of the speaker 332 is performed. Necessary processing such as D / A conversion is performed, and audio signals of a necessary number of channels are obtained.
- the audio signals of a predetermined number of channels obtained by the audio processing circuit 330 are amplified by the audio amplifying circuit 331 and then supplied to the speaker 332. Therefore, monaural, stereo, or multi-channel audio corresponding to the image display on the display panel 328 is output from the speaker 332.
- FIG. 7 shows a configuration example of the HDMI transmission unit 102 of the BD player 100 and the HDMI reception unit 202a of the audio amplifier 200 in the AV system 10 of FIG. Note that configuration examples of the HDMI transmitting unit 202b of the audio amplifier 200 and the HDMI receiving unit 302 of the television receiver 300 are the same, and thus the description thereof is omitted.
- the HDMI transmission unit 102 is an effective image section 21 (hereinafter referred to as “active” as appropriate) that is a section obtained by removing the horizontal blanking section 22 and the vertical blanking section 23 from the section from one vertical synchronization signal to the next vertical synchronization signal. (Also referred to as “video section”) (see FIG. 8), a differential signal corresponding to pixel data of an uncompressed image for one screen is transmitted to the HDMI receiving unit 202a in one direction through a plurality of channels. Also, the HDMI transmission unit 102 transmits, at a plurality of channels, differential signals corresponding to at least audio data, control data, other auxiliary data, etc. associated with an image in the horizontal blanking interval 22 or the vertical blanking interval 23. It transmits to the HDMI receiving unit 202a in one direction.
- the HDMI transmission unit 102 includes the HDMI transmitter 31.
- the transmitter 31 converts, for example, pixel data of an uncompressed image into a corresponding differential signal, and receives HDMI signals on three TMDS (Transition Minimized Differential Signaling) channels # 0, # 1, and # 2. Serial transmission is performed in one direction to the unit 202a.
- TMDS Transition Minimized Differential Signaling
- the transmitter 31 converts audio data accompanying the uncompressed image, further necessary control data and other auxiliary data, etc. into corresponding differential signals, and converts them into three TMDS channels # 0, # 1, #. 2, serially transmit to the HDMI receiving unit 202 a in one direction.
- the HDMI receiving unit 202a receives a differential signal corresponding to pixel data transmitted from the HDMI transmitting unit 102 in one direction through a plurality of channels in the active video section 21 (see FIG. 8). Also, the HDMI receiving unit 202a transmits audio signals transmitted in one direction from the HDMI transmitting unit 102 through a plurality of channels in the horizontal blanking interval 22 (see FIG. 8) or the vertical blanking interval 23 (see FIG. 8). A differential signal corresponding to data and control data is received.
- the transmission channel of the HDMI system including the HDMI transmission unit 102 and the HDMI reception unit 202a transmits pixel clocks with three TMDS channels # 0 to # 2 as transmission channels for transmitting pixel data and audio data.
- TMDS clock channel As a transmission channel, there are transmission channels called DDC (Display Data Channel) 33 and CEC (Consumer Electronics Control) line 34.
- the DDC 33 includes two signal lines included in the HDMI cable 510, and is used by the HDMI transmission unit 102 to read EDID (Extended Display Identification Data) from the HDMI receiving unit 202a connected via the HDMI cable 510. Is done. That is, in addition to the HDMI receiver 32, the HDMI receiving unit 202a has an EDID ROM (Read Only Memory) that stores EDID that is performance information related to its performance (Configuration / Capability). In the audio amplifier 200, decoding capability information (see FIG. 3) is recorded as one of the EDIDs. When the HDMI transmitting unit 102 reads the EDID, the decoding capability information on the receiving side is sent to the transmitting side.
- EDID Extended Display Identification Data
- the HDMI transmitting unit 102 reads the EDID from the HDMI receiving unit 202a connected via the HDMI cable 510 via the DDC 33. Then, the CPU 104 of the BD player 100 recognizes the performance of the audio amplifier 200 having the HDMI receiving unit 202a based on the EDID.
- the CEC line 34 includes one signal line included in the HDMI cable 510, and is used for bidirectional communication of control data between the HDMI transmission unit 102 and the HDMI reception unit 202a.
- the HDMI cable 510 includes an HPD line 35 connected to a pin called HPD (Hot Plug Detect).
- the source device can detect the connection of the sink device by the DC bias potential using the HPD line 35.
- the HPD line 35 has a function of receiving a connection state notification from the sink device by a DC bias potential.
- the HPD line has a function of notifying the source device of the connection state by a DC bias potential.
- the HDMI cable 510 includes a power supply line 36 that is used to supply power from the source device to the sink device. Further, the HDMI cable 510 includes a reserved line 37. A pair of differential transmission paths may be configured using the HPD line 35 and the reserved line 37 and used as a bidirectional communication path.
- FIG. 8 shows sections of various transmission data when image data of horizontal ⁇ vertical 1920 pixels ⁇ 1080 lines is transmitted in the TMDS channel.
- a video field 24 Video Data Period
- a data island period 25 Data Island Period
- a video field in which transmission data is transmitted using the three TMDS channels of HDMI There are three types of sections, namely, control section 26 (Control26Period).
- the video field period is a period from a rising edge (Active Edge) of a certain vertical synchronizing signal to a rising edge of the next vertical synchronizing signal, and includes a horizontal blanking period 22 (Horizontal Blanking) and a vertical blanking period 23 ( Vertical Blanking) and an effective pixel section 21 (Active Video) that is a section obtained by removing the horizontal blanking period and the vertical blanking period from the video field section.
- the video data section 24 is assigned to the effective pixel section 21.
- data of 1920 pixels (pixels) ⁇ 1080 lines of effective pixels (Active Pixel) constituting uncompressed image data for one screen is transmitted.
- the data island period 25 and the control period 26 are assigned to the horizontal blanking period 22 and the vertical blanking period 23.
- auxiliary data (Auxiliary Data) is transmitted.
- the data island section 25 is allocated to a part of the horizontal blanking period 22 and the vertical blanking period 23.
- audio data packets that are not related to the control among the auxiliary data are transmitted.
- the control section 26 is allocated to other portions of the horizontal blanking period 22 and the vertical blanking period 23.
- vertical synchronization signals, horizontal synchronization signals, control packets, and the like, which are data related to control, of auxiliary data are transmitted.
- the BD player 100 encodes the audio amplifier 200 through the HDMI digital interface when the receiving side decoding capability is higher than its own decoding capability.
- a stream is transmitted, and when the decoding capability on the receiving side is not higher than its own decoding capability, a decoded stream is transmitted. Therefore, it is possible to apply an optimal decoding process to the encoded stream, and the user can obtain an optimal audio output from the speaker system 400 connected to the audio amplifier 200.
- the BD player 100 receives the decoding capability information from the audio amplifier 200, determines whether or not the receiving side decoding capability is equal to or higher than its own decoding capability, Decide whether to send an encoded stream or a decoded stream. Therefore, the user can obtain an optimal audio output from the speaker system 400 connected to the audio amplifier 200 without any operation being imposed.
- HDMI digital interface In the above-described embodiment, an example of an HDMI digital interface is shown, but the digital interface is not limited to HDMI.
- the technology can have the following configurations. (1) a stream acquisition unit that acquires an encoded stream including a plurality of encoded data having priority information; A decoding unit that performs a decoding process on the encoded stream acquired by the stream acquisition unit to generate a decoded stream including decoded data; A determination unit that determines whether or not the receiving side decoding capability is equal to or higher than its own decoding capability based on the receiving side decoding capability information indicating to what order priority decoding is possible; When the determination unit determines that the decoding capability of the reception side is equal to or higher than its own decoding capability, the encoded stream acquired by the stream acquisition unit is transmitted to the reception side via the digital interface.
- the encoded stream is an encoded audio stream of object-based audio including encoded data of a plurality of object sound sources having priority information.
- the decoding unit performs a decoding process on the encoded audio stream acquired by the stream acquisition unit to generate a decoded audio stream including audio data of a predetermined number of channels as the decoded data. ).
- the transmission device according to any one of (1) to (3), wherein the digital interface is HDMI.
- the transmitting unit determines that the receiving side decoding capability is equal to or higher than its own decoding capability in the determining step via the digital interface to the receiving side, the code acquired in the stream acquiring step
- the determination step determines that the receiving side decoding capability is not equal to or higher than its own decoding capability, the encoded stream acquired in the stream acquisition step is decoded and generated.
- An information transmitting unit that transmits its own decoding capability information indicating to what priority level decoding is possible to the transmitting side via a digital interface; Decoding having a coded stream including a plurality of pieces of coded data having priority information or decoded data generated by performing a decoding process on the coded stream from the transmission side via the digital interface A receiving unit for receiving the digitized stream; A receiving apparatus comprising: a decoding unit that generates a decoded stream including decoded data by performing a decoding process on the encoded stream when the reception unit receives the encoded stream.
- the encoded stream is an encoded audio stream of object-based audio including encoded data of a plurality of object sound sources having priority information
- An information transmission step of transmitting own decoding capability information indicating to what priority level decoding is possible to the transmission side via the digital interface;
- the reception unit generates a coded stream including a plurality of pieces of coded data having priority information from the transmission side through the digital interface or a decoded stream generated by performing a decoding process on the coded stream.
- a receiving step for receiving a decrypted stream having data comprising: a decoding step of generating a decoded stream including decoded data by performing a decoding process on the encoded stream when the encoded stream is received in the receiving step.
- SYMBOLS 10 ... AV system 100 ... BD player 101 ... HDMI terminal 102 ... HDMI transmission part 103 ... Internal bus 104 ... CPU 105 ... Flash ROM 106 ... SDRAM DESCRIPTION OF SYMBOLS 107 ... Display control part 108 ... Remote control receiver 109 ... Remote control transmitter 111 ... Storage medium control interface 112 ... BD drive 113 ... HDD 114 ... SSD DESCRIPTION OF SYMBOLS 115 ... Ethernet interface 116 ... Network terminal 121 ... Demultiplexer 122 ... Video decoder 123 ... Graphic generation circuit 124 ... Video output terminal 125 ... Panel drive circuit 126 ... Display Panel 127 ... Audio decoder 128 ...
- SDRAM 307 Display control unit 308: Remote control receiver 309 ... Remote control transmitter 310 ... Power supply unit 311 ... Ethernet interface 312 ... Network terminal 321 ... Antenna terminal 322 ... Digital Tuner 323 ... Demultiplexer 324 ... Video decoder 325 ... Video processing circuit 326 ... Graphic generation circuit 327 ... Panel drive circuit 328 ... Display panel 329 ... Audio decoder 330 ... Audio processing circuit 331 ... Audio amplification circuit 332 ... Speaker 400 ... Speaker system 510, 520 ... HDMI cable
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Abstract
Description
優先度情報を持つ複数の符号化データを含む符号化ストリームを取得するストリーム取得部と、
上記ストリーム取得部で取得された符号化ストリームに復号化処理を施して復号化済データを含む復号化済ストリームを生成するデコード部と、
何番目の優先度まで復号化可能かを示す受信側の復号化能力情報に基づいて上記受信側の復号化能力が自身の復号化能力以上か否かを判断する判断部と、
上記受信側に、デジタルインタフェースを介して、上記判断部で上記受信側の復号化能力が自身の復号化能力以上であると判断されたときは上記ストリーム取得部で取得された符号化ストリームを送信し、上記判断部で上記受信側の復号化能力が自身の復号化能力以上でないと判断されるときは上記デコード部で生成された復号化済ストリームを送信する送信部を備える
送信装置にある。
何番目の優先度まで復号化可能かを示す自身の復号化能力情報を、デジタルインタフェースを介して、送信側に送信する情報送信部と、
上記送信側から、上記デジタルインタフェースを介して、優先度情報を持つ複数の符号化データを含む符号化ストリームまたは該符号化ストリームに復号化処理が施されて生成された復号化済データを持つ復号化済ストリームを受信する受信部と、
上記受信部で上記符号化ストリームが受信されたとき、該符号化ストリームに復号化処理を施して復号化済データを含む復号化済ストリームを生成するデコード部を備える
受信装置にある。
1.実施の形態
2.変形例
[AVシステムの構成例]
図1は、実施の形態としてのAV(Audio Visual)システム10の構成例を示している。このAVシステム10は、ソース機器としてのBD(Blu-Ray Disc)プレーヤ100と、リピータ機器としてのオーディオアンプ200と、シンク機器としてのテレビ受信機300を有している。オーディオアンプ200には、マルチチャネル用のスピーカシステム400が接続されている。
図2は、BDプレーヤ100の構成例を示している。このBDプレーヤ100は、HDMI端子101と、HDMI送信部102を有している。また、このBDプレーヤ100は、内部バス103と、CPU(Central Processing Unit)104と、フラッシュROM(Read Only Memory)105と、SDRAM(Synchronous Random Access Memory)106と、表示制御部107と、リモコン受信部108と、リモコン送信機109を有している。
図5は、オーディオアンプ200の構成例を示している。オーディオアンプ200は、HDMI端子201a,201bと、HDMI受信部202aと、HDMI送信部202bを有している。また、オーディオアンプ200は、オーディオデコーダ221と、選択部222と、音声処理回路223と、音声増幅回路224と、音声出力端子225を有している。
図6は、テレビ受信機300の構成例を示している。テレビ受信機300は、HDMI端子301と、HDMI受信部302を有している。また、テレビ受信機300は、内部バス303と、CPU304と、フラッシュROM305と、SDRAM(Synchronous RAM)306と、表示制御部307と、リモコン受信部308と、リモコン送信機309と、電源部310と、イーサネットインタフェース(Ethernet I/F)311と、ネットワーク端子312を有している。
図7は、図1のAVシステム10における、BDプレーヤ100のHDMI送信部102とオーディオアンプ200のHDMI受信部202aの構成例を示している。なお、オーディオアンプ200のHDMI送信部202bとテレビ受信機300のHDMI受信部302の構成例に関しては、同様の構成となるので、説明は省略する。
なお、上述実施の形態においては、優先度情報を持つ複数の符号化データを含む符号化ストリームがオブジェクトベースオーディオの符号化オーディオストリームである例を示した。本技術は、優先度情報を持つ複数の符号化ビデオデータを含む符号化ビデオストリームを取り扱う場合にも同様に適用できることは勿論である。この場合、符号化ビデオストリームに対する復号化処理は、送信側と受信側のうち復号化能力の高い方で行われる。
(1)優先度情報を持つ複数の符号化データを含む符号化ストリームを取得するストリーム取得部と、
上記ストリーム取得部で取得された符号化ストリームに復号化処理を施して復号化済データを含む復号化済ストリームを生成するデコード部と、
何番目の優先度まで復号化可能かを示す受信側の復号化能力情報に基づいて上記受信側の復号化能力が自身の復号化能力以上か否かを判断する判断部と、
上記受信側に、デジタルインタフェースを介して、上記判断部で上記受信側の復号化能力が自身の復号化能力以上であると判断されたときは上記ストリーム取得部で取得された符号化ストリームを送信し、上記判断部で上記受信側の復号化能力が自身の復号化能力以上でないと判断されたときは上記デコード部で生成された復号化済ストリームを送信する送信部を備える
送信装置。
(2)上記符号化ストリームは、優先度情報を持つ複数のオブジェクト音源の符号化データを含むオブジェクトベースオーディオの符号化オーディオストリームであり、
上記デコード部は、上記ストリーム取得部で取得された上記符号化オーディオストリームに復号化処理を施して上記復号化済データとして所定チャネル数の音声データを含む復号化済オーディオストリームを生成する
前記(1)に記載の送信装置。
(3)上記受信側から、上記デジタルインタフェースを介して、上記受信側の復号化能力情報を受信する情報受信部をさらに備える
前記(1)または(2)に記載の送信装置。
(4)上記デジタルインタフェースはHDMIである
前記(1)から(3)のいずれかに記載の送信装置。
(5)優先度報を持つ複数の符号化データを含む符号化ストリームを取得するストリーム取得ステップと、
何番目の優先度まで復号化可能かを示す受信側の復号化能力情報に基づいて上記受信側の復号化能力が自身の復号化能力以上か否かを判断する判断ステップと、
送信部により、上記受信側に、デジタルインタフェースを介して、上記判断ステップで上記受信側の復号化能力が自身の復号化能力以上であると判断されたときは上記ストリーム取得ステップで取得された符号化ストリームを送信し、上記判断ステップで上記受信側の復号化能力が自身の復号化能力以上でないと判断されたときは上記ストリーム取得ステップで取得された符号化ストリームに復号化処理を施して生成された、復号化済データを持つ復号化済ストリームを送信する送信ステップを有する
送信方法。
(6)何番目の優先度まで復号化可能かを示す自身の復号化能力情報を、デジタルインタフェースを介して、送信側に送信する情報送信部と、
上記送信側から、上記デジタルインタフェースを介して、優先度情報を持つ複数の符号化データを含む符号化ストリームまたは該符号化ストリームに復号化処理が施されて生成された復号化済データを持つ復号化済ストリームを受信する受信部と、
上記受信部で上記符号化ストリームが受信されたとき、該符号化ストリームに復号化処理を施して復号化済データを含む復号化済ストリームを生成するデコード部を備える
受信装置。
(7)上記符号化ストリームは、優先度情報を持つ複数のオブジェクト音源の符号化データを含むオブジェクトベースオーディオの符号化オーディオストリームであり、
上記復号化済ストリームは、上記符号化オーディオストリームに復号化処理が施されて生成された所定チャネル数の音声データを上記復号化済みデータとして含む
前記(6)に記載の受信装置。
(8)上記デジタルインタフェースはHDMIである
前記(6)または(7)に記載の受信装置。
(9)何番目の優先度まで復号化可能かを示す自身の復号化能力情報を、デジタルインタフェースを介して、送信側に送信する情報送信ステップと、
受信部により、上記送信側から、上記デジタルインタフェースを介して、優先度情報を持つ複数の符号化データを含む符号化ストリームまたは該符号化ストリームに復号化処理が施されて生成された復号化済データを持つ復号化済ストリームを受信する受信ステップと、
上記受信ステップで上記符号化ストリームが受信されたとき、該符号化ストリームに復号化処理を施して復号化済データを含む復号化済ストリームを生成するデコードステップを有する
受信方法。
100・・・BDプレーヤ
101・・・HDMI端子
102・・・HDMI送信部
103・・・内部バス
104・・・CPU
105・・・フラッシュROM
106・・・SDRAM
107・・・表示制御部
108・・・リモコン受信部
109・・・リモコン送信機
111・・・記憶媒体制御インタフェース
112・・・BDドライブ
113・・・HDD
114・・・SSD
115・・・イーサネットインタフェース
116・・・ネットワーク端子
121・・・デマルチプレクサ
122・・・ビデオデコーダ
123・・・グラフィック生成回路
124・・・映像出力端子
125・・・パネル駆動回路
126・・・表示パネル
127・・・オーディオデコーダ
128・・・選択部
129・・・音声出力端子
131・・・電源部
200・・・オーディオアンプ
201a,201b・・・HDMI端子
202a・・・HDMI受信部
202b・・・HDMI送信部
203・・・内部バス
204・・・CPU
205・・・フラッシュROM
206・・・SDRAM
207・・・表示制御部
208・・・パネル駆動回路
209・・・表示パネル
210・・・リモコン受信部
211・・・リモコン送信機
212・・・電源部
221・・・オーディオデコーダ
222・・・選択部
223・・・音声処理回路
224・・・音声増幅回路
225・・・音声出力端子
300・・・テレビ受信機
301・・・HDMI端子
302・・・HDMI受信部
303・・・内部バス
304・・・CPU
305・・・フラッシュROM
306・・・SDRAM
307・・・表示制御部
308・・・リモコン受信部
309・・・リモコン送信機
310・・・電源部
311・・・イーサネットインタフェース
312・・・ネットワーク端子
321・・・アンテナ端子
322・・・デジタルチューナ
323・・・デマルチプレクサ
324・・・ビデオデコーダ
325・・・映像処理回路
326・・・グラフィック生成回路
327・・・パネル駆動回路
328・・・表示パネル
329・・・オーディオデコーダ
330・・・音声処理回路
331・・・音声増幅回路
332・・・スピーカ
400・・・スピーカシステム
510,520・・・HDMIケーブル
Claims (9)
- 優先度情報を持つ複数の符号化データを含む符号化ストリームを取得するストリーム取得部と、
上記ストリーム取得部で取得された符号化ストリームに復号化処理を施して復号化済データを含む復号化済ストリームを生成するデコード部と、
何番目の優先度まで復号化可能かを示す受信側の復号化能力情報に基づいて上記受信側の復号化能力が自身の復号化能力以上か否かを判断する判断部と、
上記受信側に、デジタルインタフェースを介して、上記判断部で上記受信側の復号化能力が自身の復号化能力以上であると判断されたときは上記ストリーム取得部で取得された符号化ストリームを送信し、上記判断部で上記受信側の復号化能力が自身の復号化能力以上でないと判断されたときは上記デコード部で生成された復号化済ストリームを送信する送信部を備える
送信装置。 - 上記符号化ストリームは、優先度情報を持つ複数のオブジェクト音源の符号化データを含むオブジェクトベースオーディオの符号化オーディオストリームであり、
上記デコード部は、上記ストリーム取得部で取得された上記符号化オーディオストリームに復号化処理を施して上記復号化済データとして所定チャネル数の音声データを含む復号化済オーディオストリームを生成する
請求項1に記載の送信装置。 - 上記受信側から、上記デジタルインタフェースを介して、上記受信側の復号化能力情報を受信する情報受信部をさらに備える
請求項1に記載の送信装置。 - 上記デジタルインタフェースはHDMIである
請求項1に記載の送信装置。 - 優先度報を持つ複数の符号化データを含む符号化ストリームを取得するストリーム取得ステップと、
何番目の優先度まで復号化可能かを示す受信側の復号化能力情報に基づいて上記受信側の復号化能力が自身の復号化能力以上か否かを判断する判断ステップと、
送信部により、上記受信側に、デジタルインタフェースを介して、上記判断ステップで上記受信側の復号化能力が自身の復号化能力以上であると判断されたときは上記ストリーム取得ステップで取得された符号化ストリームを送信し、上記判断ステップで上記受信側の復号化能力が自身の復号化能力以上でないと判断されたときは上記ストリーム取得ステップで取得された符号化ストリームに復号化処理を施して生成された、復号化済データを持つ復号化済ストリームを送信する送信ステップを有する
送信方法。 - 何番目の優先度まで復号化可能かを示す自身の復号化能力情報を、デジタルインタフェースを介して、送信側に送信する情報送信部と、
上記送信側から、上記デジタルインタフェースを介して、優先度情報を持つ複数の符号化データを含む符号化ストリームまたは該符号化ストリームに復号化処理が施されて生成された復号化済データを持つ復号化済ストリームを受信する受信部と、
上記受信部で上記符号化ストリームが受信されたとき、該符号化ストリームに復号化処理を施して復号化済データを含む復号化済ストリームを生成するデコード部を備える
受信装置。 - 上記符号化ストリームは、優先度情報を持つ複数のオブジェクト音源の符号化データを含むオブジェクトベースオーディオの符号化オーディオストリームであり、
上記復号化済ストリームは、上記符号化オーディオストリームに復号化処理が施されて生成された所定チャネル数の音声データを上記復号化済みデータとして含む
請求項6に記載の受信装置。 - 上記デジタルインタフェースはHDMIである
請求項6に記載の受信装置。 - 何番目の優先度まで復号化可能かを示す自身の復号化能力情報を、デジタルインタフェースを介して、送信側に送信する情報送信ステップと、
受信部により、上記送信側から、上記デジタルインタフェースを介して、優先度情報を持つ複数の符号化データを含む符号化ストリームまたは該符号化ストリームに復号化処理が施されて生成された復号化済データを持つ復号化済ストリームを受信する受信ステップと、
上記受信ステップで上記符号化ストリームが受信されたとき、該符号化ストリームに復号化処理を施して復号化済データを含む復号化済ストリームを生成するデコードステップを有する
受信方法。
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