CN101536519B - Electronic device, content reproducing method, and content decoding method - Google Patents

Electronic device, content reproducing method, and content decoding method Download PDF

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Publication number
CN101536519B
CN101536519B CN2007800414965A CN200780041496A CN101536519B CN 101536519 B CN101536519 B CN 101536519B CN 2007800414965 A CN2007800414965 A CN 2007800414965A CN 200780041496 A CN200780041496 A CN 200780041496A CN 101536519 B CN101536519 B CN 101536519B
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CN
China
Prior art keywords
hdmi
receiver
signal
content
data
Prior art date
Application number
CN2007800414965A
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Chinese (zh)
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CN101536519A (en
Inventor
中嶋康久
菊池秀和
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索尼株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to JP2006301486 priority Critical
Priority to JP301486/2006 priority
Priority to JP2007050426 priority
Priority to JP050426/2007 priority
Priority to JP166918/2007 priority
Priority to JP2007166918 priority
Application filed by 索尼株式会社 filed Critical 索尼株式会社
Priority to PCT/JP2007/071664 priority patent/WO2008056718A1/en
Publication of CN101536519A publication Critical patent/CN101536519A/en
Application granted granted Critical
Publication of CN101536519B publication Critical patent/CN101536519B/en

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Abstract

The invention discloses a promptly decode and reproduce contents of any encoding formats. When a TV (1) has judged that it cannot decode a content to be viewed by a user, the TV (1) asks other device such as a game device (3) and a PC (4) whether it can decode the content via a high-speed data line (150) capable of performing bidirectional IP communication in an extended HDMI and transmits the content and a decoding request command to the device which has answered that it can perform decoding, via the high-speed data line (150). The game device (3) or the PC (4) which has received the decoding request decodes the content and transmits the decoded content as a base line signal to the TV (1) via a TMDS channel in the extended HDMI so that the content is reproduced.

Description

Electronic equipment, content reproducing method and content decoding method

Technical field

The present invention relates to be connected and can reproduce electronic equipment, the content reproducing method in this electronic equipment and the content decoding method of content with other electronic equipments.

Background technology

In recent years, constructed following system, for example interconnected on back transmission broadcast singal or the network PC (Personal Computer) or television equipment, other the electronic equipment of AV (Audio/Video) equipment etc. or the various contents on the internet.But, because the coded format of broadcast singal or network and the content on the internet is of all kinds, so concerning electronic equipment, also have video content, sound-content and web content with the format encoded that can not decode.

About such problem; In following patent documentation 1; Put down in writing following technology: in advance server unit notice is used to represent the form that terminal installation can be decoded or the information of bit rate, server unit comes transform format or bit rate according to this information, and content is sent to customer set up.

In addition; In following patent documentation 2; Also put down in writing following technology: video reproducing apparatus will send to video transmission device about the data reproduction ability of self or the attribute information of memory capacity, and video transmission device is encoded to content based on this attribute information and sent to customer set up.

Patent documentation 1: the spy opens flat 9-284567 communique ([0040]~[0046] section etc.)

Patent documentation 2: the spy opens 2001-358799 communique ([0006] section etc.)

Patent documentation 3: the spy opens the 2005-57714 communique

Patent documentation 4: the spy opens the 2006-19948 communique

Summary of the invention

The problem that invention will solve

But; In the technology of above-mentioned patent documentation 1 or patent documentation 2 records; Need the time when in above-mentioned server unit or video transmission device, the content after the conversion being decoded during the form of content transformed or in terminal installation or video reproducing apparatus; So can not carry out the desired reproduction of user immediately, bring the stand-by period to the user.

Situation in view of as above such the objective of the invention is to, provide a kind of can be promptly with the content decoding of all coded formats and the electronic equipment that reproduces, content reproducing method and the content decoding method in this electronic equipment.

Be used to solve the means of problem

In order to solve above-mentioned problem; The electronic equipment of main aspect of the present invention is the electronic equipment that is connected with other electronic equipments; It comprises: the 1st communication component, send the decoding request signal with the coded format content encoded that can not decode at this electronic equipment and the decoding of asking this content; The 2nd communication component will be at said other electronic equipments based on the described request signal and decoded said content receives as baseband signal; And reproduction block, the content of said reception is reproduced.

Wherein, content is meant, live image content, rest image content, sound-content, content of text, web content etc.The source of obtaining of this content is not special to be limited, for example the content of applicable broadcasting, the content that obtains from storage medium, all the elements such as content of user oneself generation.In addition; Coded format is meant; If then MPEG-1 (Moving Picture Experts Group phase 1), MPEG-2, MPEG-4, MPEG-4 AVC (Advanced Video Coding) of live image for example; If rest image is JPEG (Joint Photographic Experts Group), GIF (Graphic InterchangeFormat) etc. then, if sound then MP3 (MPEG-1 Audio Layer-3), AAC (MPEG-2 (4) Audio AAC), ATRAC (Adaptive TRansform Acoustic Coding) etc.In addition, electronic equipment is meant, for example the AV equipment of television equipment, PC, DVD player or HDD (Hard Disk Drive) register, AV amplifier etc., game station etc.Above-mentioned the 1st communication component and the 2nd communication component can be single transmission paths, also can be independent transmission paths.In addition; " reproduction " is meant; The vision signal or the voice signal of content are made as exportable state; Be not only the situation that this electronic equipment has the output device of display unit or loud speaker etc., also comprise the outside is connected to the display unit of this electronic equipment or the situation that speaker unit sends vision signal or voice signal.

According to such structure, even the content that in an electronic equipment, can not decode also can make other electronic equipment decodings, so can decode and reproduce the content of all coded formats.Therefore, the user can audiovisual expectation content and need not to buy and decode corresponding new equipment, the convenience raising.In addition; Received content is as the baseband signal after the decoding; Thereby thereby compare with the situation that equipment that the content that can not decode sends to other carries out the conversion of coded format; Need not carry out the time of format conversion decoding afterwards, thus can begin to reproduce the user immediately to the reproduction of content request, and irrelevant with the decoding capability of electronic equipment.

In this electronic equipment; Also can be that said the 1st communication component sends said decoding request signal and content via the 1st transmission path with the 1st transmission speed, said the 2nd communication component receives said decoded content via the 2nd transmission path with the 2nd transmission speed faster than said the 1st transmission speed.

Wherein, The 1st transmission path is meant; For example Ethernet (registered trade mark), USB (UniversalSerial Bus), IEEE1394 etc.; The 2nd transmission path is meant, for example HDMI, DVI (Digital VisualInterface), Display Port, UDI (Unified Display Interface) etc.The 1st transmission speed is for example about 5Gbps~10Gbps, but is not limited to this scope for for example about 100Mbps~500Mbps, the 2nd transmission speed.Use at the 2nd transmission path under the situation of HDMI, this electronic equipment becomes reception (sink) equipment, and other electronic equipments become source (source) equipment.In addition, the 1st transmission path and the 2nd transmission path can be housed in the single cable, and the 1st and the 2nd communication component also can be used as the single terminal with each pin connector that is used for the 1st and the 2nd transmission path and constitutes.For example; As the 1st transmission path; Also can adopt following line: through will carrying out the transmission of differential wave in couples, thereby expand to the line that can carry out the high-speed bidirectional communication of IP communication etc. with Ethernet (registered trade mark) at (Hot Plug Detect) line of the HPD among the HDMI in the past and siding identically.In addition, as the 2nd transmission path, also can be employed in TMDS (the TransitionMinimized Differential Signaling) passage among the HDMI.

Through such structure; The signal of the smaller capacity of content encoded is sent via the 1st transmission path with the decoding request signal; The jumbo baseband signal of the content of decoding is received via the 2nd transmission path; So can send received content expeditiously, even the content that can not decode also can be reproduced immediately and can not bring the stand-by period to the user.

In this electronic equipment, also can be to have a plurality of said other electronic equipments, said the 1st communication component comprises: the parts that said a plurality of other electronic equipments sent the request signal in required processing time of the decoding that is used to inquire about said content respectively; Receive the parts that respond the response signal in said processing time according to said request signal respectively from said a plurality of other electronic equipments; And based on said each response signal, to sending the parts of said decoding request signal at decode other electronic equipments of said content of the shortest said processing time.

Like this, even exist under a plurality of situation at other electronic equipments that can decode content, also can be to can sending the decoding request signal at an electronic equipment of the shortest processing time decoding, thus can more effectively decode and reproduce content.

In this electronic equipment; Can also can be said other electronic equipments be connected with the server unit of the software of having stored the said content that is used to decode, and said the 1st communication component comprises: said other electronic equipments are sent be used to inquire about the parts of request signal of said content of decoding; From said other electronic equipments receive the said decoding of response can the parts of response signal; And under the situation that is receiving the said said response signal that can not decode of response, said other electronic equipments are sent the parts of said decoding request signal of said decoding that are used to ask from the reception request signal of the reception of the said software of said server unit and are used to have asked to use the software of this reception.

Like this, even under can not the situation of decode content, use this software to decode from the server unit receiving software, thereby can reproduce all contents at this electronic equipment through other electronic equipments.

The electronic equipment of other aspects of the present invention is the electronic equipments that are connected with other electronic equipments; Comprise: the 1st communication component receives the decoding request signal with the coded format content encoded that can not decode at these other electronic equipments and the decoding of asking this content from said other electronic equipments; The decoding parts, based on said decoding request signal, the said content of decoding; And the 2nd communication component, said decoded content is sent to said other electronic equipments as baseband signal.

Through such structure, even can not carry out at other electronic equipments under the situation of decoding of content, also can be according to from the request of other electronic equipments and decode content and send, so can make other electronic equipments reproduce all contents as baseband signal.

In this electronic equipment; Also can be that said the 1st communication component receives said decoding request signal and content via the 1st transmission path with the 1st transmission speed, said the 2nd communication component sends said decoded content via the 2nd transmission path with the 2nd transmission speed faster than said the 1st transmission speed.

Like this; The transmission path of the decoding request signal through being provided for receiving the content that is encoded and this content respectively and being used to sends the transmission path of the content after the decoding, thus can and other electronic equipments between carry out the processing till the reproduction that is decoded to expeditiously from content.

Can in this electronic equipment, said the 1st communication component also can comprise: receive from said other electronic equipments and be used to inquire about the parts of request signal in required processing time of the decoding of said content and said content of decoding; And to said other electronic equipments, according to said response signal send be used to respond said decoding can and the parts of the response signal in processing time.

Like this; Except according to from the request of other electronic equipments and can decode content this electronic equipment also under situation of existence; Through notifying the above-mentioned processing time to other electronic equipments; Thereby can make as other electronic equipments of the request source of decoding and select the electronic equipment that to decode in the shortest processing time, can further proceed to the processing till the reproduction of content expeditiously.

It in this electronic equipment, also can be also to comprise: decision means, the judgement said content of can decoding; And the 3rd communication component, under the situation that is judged as the said content of can not decoding, receiving this software from the server unit of the software of having stored this content that is used to decode, said decoding parts use the software of said reception that said content is decoded.

Like this, even under can not the situation of decode content, also can use this software to decode, thereby can make other electronic equipments reproduce all contents from the server unit receiving software through this electronic equipment.In addition, the 3rd communication component for example is Ethernet (registered trade mark).

The content reproducing method of other aspects of the present invention is; With electronic equipment that other electronic equipments are connected in the reproduction of content method; Transmission is with the said content of the coded format that can not decode at this electronic equipment coding and ask the decoding request signal of the decoding of this content; To the content of said reception be reproduced at said other electronic equipments based on the described request signal and decoded said content receives as baseband signal.

The content decoding method of other aspects of the present invention is; With electronic equipment that other electronic equipments are connected in the coding/decoding method of content; Receive said content of encoding and the decoding request signal of asking the decoding of this content from said other electronic equipments with the coded format that can not decode at these other electronic equipments; Based on said decoding request signal, the said content of decoding sends to said other electronic equipments with said decoded content as baseband signal.

The invention effect

As stated, according to the present invention, can promptly decode and reproduce the content of all coded formats.

Description of drawings

Fig. 1 is the figure of the structure of the general image delivering system of expression.

Fig. 2 is the figure of structure that expression has been suitable for the image delivering system of an execution mode of the present invention.

Fig. 3 is the figure of the configuration example of expression HDMI (R) source (source) and HDMI (R) receiver (sink).

Fig. 4 is the figure that the pin of connector of the type A of expression HDMI (R) is arranged.

Fig. 5 is the figure that the pin of connector of the Type C of expression HDMI (R) is arranged.

Fig. 6 is the figure of the more detailed configuration example of expression HDMI (R) source and HDMI (R) receiver.

Fig. 7 is other the figure of more detailed configuration example of expression HDMI (R) source and HDMI (R) receiver.

Fig. 8 is the figure of the data structure of expression E-EDID.

Fig. 9 is the figure of the data structure of expression Vender Specific.

Figure 10 is the flow chart of explanation through the communication process in HDMI (R) source.

Figure 11 is the flow chart of explanation through the communication process of HDMI (R) receiver.

Figure 12 is the flow chart of explanation through the communication process in HDMI (R) source.

Figure 13 is the flow chart of explanation through the communication process of HDMI (R) receiver.

Figure 14 is other the figure of more detailed configuration example of expression HDMI (R) source and HDMI (R) receiver.

Figure 15 is the flow chart of explanation through the communication process in HDMI (R) source.

Figure 16 is the flow chart of explanation through the communication process of HDMI (R) receiver.

Figure 17 is the block diagram of configuration example that has been suitable for an execution mode of computer of the present invention.

Figure 18 is the circuit diagram of expression through the 1st configuration example of the communication system of the connection status of at least one the DC bias potential notification interface in transmission path.

The figure of the configuration example of the system when Figure 19 is expression adding Ethernet (registered trade mark) (Ethernet (registered trade mark)).

Figure 20 is the circuit diagram of expression through the 2nd configuration example of the communication system of the connection status of at least one the DC bias potential notification interface in transmission path.

Figure 21 is the figure that is illustrated in the two-way communication waveform in the communication system of configuration example.

Figure 22 is the figure of structure that has represented the content decoding system of an execution mode of the present invention.

Figure 23 is the block diagram of the structure of the TV in the expression execution mode of the present invention.

Figure 24 is the block diagram of the structure of the PC in the expression execution mode of the present invention.

Figure 25 is the figure of basic electric structure of expansion HDMI receiving element of expansion HDMI transmitting element and the TV of the PC of expression in the execution mode of the present invention.

Figure 26 is the sequential chart of flow process of processing of the content decoding system of an expression execution mode of the present invention.

Figure 27 is the flow chart of expression as the flow process of the action of the TV of in one embodiment of the present invention receiving equipment.

Figure 28 is expression as the flow chart of the flow process of the action of the game station of in one embodiment of the present invention source device and PC.

Figure 29 (a)~(b) be represented in one embodiment of the present invention can decode content the figure of example of query statement.

Figure 30 (a)~(b) be represented in one embodiment of the present invention can decode content the figure of example of response instruction.

Figure 31 (a)~(b) be represented in one embodiment of the present invention to the query statement of server with for the figure from the example of the response instruction of server of this query statement.

Label declaration

1 ... TV; 2 ... The AV amplifier; 3 ... Game station; 4 ... PC; 5 ... Server; 6 ... The internet; 35 ... HDMI (R) cable; 71 ... HDMI (R) source; 72 ... HDMI (R) receiver; 81 ... Conveyer; 82 ... Receiver; 83 ... DDC; 84 ... The CEC line; 85 ... EDIDROM; 121 ... Switch control unit; 124 ... Switch control unit; 131 ... Converter unit; 132 ... Decoding unit; 133 ... Switch; 134 ... Converter unit; 135 ... Switch; 136 ... Decoding unit; 141 ... Holding wire; 171 ... Switch control unit; 172 ... Switch control unit; 181 ... Switch; 182 ... Switch; 183 ... Decoding unit; 184 ... Converter unit; 185 ... Switch; 186 ... Switch; 191 ... Sda line; 192 ... Scl line; 400 ... Communication system; 401 ... LAN function expansion HDMI (EH) source device; 411 ... The lan signal transtation mission circuit; 412 ... Terminal resistance; 413; 414 ... The AC coupling capacitance; 415 ... The lan signal receiving circuit; 416 ... Subtraction circuit; 421 ... Pull-up resistor; 422 ... Resistance; 423 ... Electric capacity; 424 ... Comparator; 431 ... Pull down resistor; 432 ... Resistance; 433 ... Electric capacity; 434 ... Comparator; 402 ... The EH receiving equipment; 441 ... The lan signal transtation mission circuit; 442 ... Terminal resistance; 443; 444 ... The AC coupling capacitance; 445 ... The lan signal receiving circuit; 446 ... Subtraction circuit; 451 ... Pull down resistor; 452 ... Resistance; 453 ... Electric capacity; 454 ... Comparator; 461 ... Choking-winding; 462; 463 ... Resistance; 403 ... The EH cable; 501 ... Siding; 502 ... The HPD line; 511; 512 ... The source terminal; 521; 522 ... The receiver-side terminal; 600 ... Communication system; 601 ... LAN function expansion HDMI (EH) source device; 611 ... The lan signal transtation mission circuit; 612; 613 ... Terminal resistance; 614~617 ... The AC coupling capacitance; 618 ... The lan signal receiving circuit; 620 ... Inverter; 621 ... Resistance; 622 ... Resistance; 623 ... Electric capacity; 624 ... Comparator; 631 ... Pull down resistor; 632 ... Resistance; 633 ... Electric capacity; 634 ... Comparator; 640 ... NOR gate; 641~644 ... Analog switch; 645 ... Inverter; 646; 647 ... Analog switch; 651; 652 ... The DDC transceiver; 653; 654 ... Pull-up resistor; 602 ... The EH receiving equipment; 661 ... The lan signal transtation mission circuit; 662; 663 ... Terminal resistance; 664~667 ... The AC coupling capacitance; 668 ... The lan signal receiving circuit; 671 ... Pull down resistor; 672 ... Resistance; 673 ... Electric capacity; 674 ... Comparator; 681 ... Choking-winding; 682; 683 ... Resistance; 691~694 ... Analog switch; 695 ... Inverter; 696; 697 ... Analog switch; 701; 702 ... The DDC transceiver; 703 ... Pull-up resistor; 603 ... The EH cable; 801 ... Siding; 802 ... The HPD line; 803 ... Scl line; 804 ... Sda line; 811~814 ... The source terminal; 821~824 ... The receiver-side terminal; 911 ... Remote controllers (remote controller); 918; 945 ... Display floater; 921; 947 ... Loud speaker; 922; 951 ... Expansion HDMI terminal; 923 ... Expansion HDMI receiving element; 925; 941 ... CPU; 929; 952 ... Ethernet (registered trade mark) I/F; 950 ... Expansion HDMI transmitting element; 956 ... The USB terminal; 120 ... Transmitter; 150 ... High speed data lines; 410 ... Receiver

Embodiment

Below, based on description of drawings execution mode of the present invention.

Can carry out the communication system (image delivering system) that two-way High Speed IP is communicated by letter when at first, explanation can keep the interchangeability of communication interface of the HDMI etc. with in the past.

In recent years; As for example from DVD register, STB, other AV source to television receiver, projecting apparatus, other display transmitting digital TV signal at high speed; Be the pixel data and the communication interface of following the voice data of this image of the image of non-compression (base band), popularizing HDMI (R).

For HDMI (R); In the specifications of HDMI, stipulated pixel data and voice data; At high speed from HDMI (R) source to TMDS (the TransitionMinimized Differential Signaling) passage of HDMI (R) receiver uniaxially transmission, and the CEC line (Consumer Electronics Control Line) etc. that is used between HDMI (R) source and HDMI (R) receiver, carrying out two-way communication.

Fig. 1 is the figure of the structure of the general image delivering system of expression.

That kind for example shown in Figure 1 through being that HDMI (R) cable 13 of benchmark connects digital television receivers 11 and AV amplifiers 12 with HDMI (R), thereby can be carried out the high-speed transfer of pixel data and voice data.

In Fig. 1; In the figure of user's dwelling house; The living room that is provided with in the left side has disposed digital television receiver 11, AV amplifier 12 and transcriber 14, and digital television receiver 11 is connected through HDMI (R) cable 13 and HDMI (R) cable 15 with transcriber 14 with AV amplifier 12 and AV amplifier 12.

In addition, in the living room, disposed hub 16, digital television receiver 11 is connected to hub 16 with transcriber 14 through LAN (Local Area Network) cable 17 and LAN cable 18.In addition, among the figure, the bedroom that is provided with on the right side in living room has disposed digital television receiver 19, and digital television receiver 19 is connected to hub 16 via LAN cable 20.

For example; Content recorded is reproduced in transcriber 14; Thereby in digital television receiver 11 under the situation of display image; Transcriber 14 is used in pixel data and the audio data decoding that reproduces content, and resulting incompressible pixel data of its result and voice data are offered digital television receiver 11 via HDMI (R) cable 15, AV amplifier 12 and HDMI (R) cable 13.Then, digital television receiver 11 is based on pixel data that provides from transcriber 14 and voice data, display image or output sound.

In addition; Content recorded is reproduced in transcriber 14; Thereby in digital television receiver 11 and digital television receiver 19 simultaneously under the situation of display image; Transcriber 14 offers digital television receiver 11 with pixel data and voice data compressed, that be used to reproduce content via LAN cable 18, hub 16 and LAN cable 17, and offers digital television receiver 19 via LAN cable 18, hub 16 and LAN cable 20.

Then, digital television receiver 11 will be decoded from pixel data and voice data that transcriber 14 provides with digital television receiver 19, based on the resulting incompressible pixel data of its result and voice data, display image or output sound.

In addition; Receive at digital television receiver 11 under the situation of pixel data and voice data of the program that is used to reproduce television broadcasting; At the voice data that receives for example is 5.1 passages around the voice data of (channelsurround) etc.; And during the voice data that can not decoded digital television receiver 11 be received, digital television receiver 11 sends to AV amplifier 12 after voice data is transformed to light signal.

AV amplifier 12 carries out light-to-current inversion after receiving the light signal of sending from digital television receiver 11, and resulting voice data is thus decoded.Then, AV amplifier 12 amplifies decoded incompressible voice data as required, and reproduces sound through the circulating loudspeaker that is connected to AV amplifier 12.Like this, digital television receiver 11 comes the pixel data decoding that receives display image through the pixel data of decoding, and based on the voice data that offers AV amplifier 12, through AV amplifier 12 output sounds, thereby reproduces 5.1 passages around program.

Fig. 2 is the figure of structure that expression has been suitable for the image delivering system of an execution mode of the present invention.

Image delivering system is made up of digital television receiver 31, amplifier 32, transcriber 33 and digital television receiver 34, and digital television receiver 31 is connected with HDMI (R) cable 36 through HDMI (R) cable 35 of conduct based on the telecommunication cable of HDMI (R) with transcriber 33 with amplifier 32 and amplifier 32.In addition, the LAN cable 37 used of digital television receiver 31 and digital television receiver 34 LAN through Ethernet (registered trade mark) etc. connects.

In the example of Fig. 2, in the figure of user's dwelling house, digital television receiver 31, amplifier 32, transcriber 33 are configured in the living room that the left side is provided with, and digital television receiver 34 is configured in the bedroom that the right side in living room is provided with.

Transcriber 33 for example is made up of DVD player or hdd recorder etc.; It will be used to reproduce the pixel data and the audio data decoding of content, and resulting incompressible pixel data of its result and voice data are offered amplifier 32 via HDMI (R) cable 36.

Amplifier 32 for example is made up of AV amplifier etc., and it accepts providing of pixel data and voice data from transcriber 33, and amplifies the voice data that is provided as required.In addition, amplifier 32 will offer digital television receiver 31 from voice data and the pixel data that transcriber 33 provides and is exaggerated as required via HDMI (R) cable 35.Digital television receiver 31 is based on pixel data that provides from amplifier 32 and voice data, display image or output sound, thus reproduce content.

In addition; Digital television receiver 31 utilizes HDMI (R) cable 35 with amplifier 32; Can carry out the two-way communication of the communication of IP for example etc. at a high speed, and amplifier 32 also utilizes HDMI (R) cable 36 with transcriber 33, can carry out the two-way communication of for example IP communication etc. at a high speed.

Promptly; For example transcriber 33 is communicated by letter through carrying out IP with amplifier 32; Thereby can be with compressed pixel data and voice data as being the data of benchmark with IP; Send to amplifier 32 via HDMI (R) cable 36, amplifier 32 can receive compressed pixel data and the voice data of sending from transcriber 33.

In addition; Amplifier 32 is communicated by letter through carrying out IP with digital television receiver 31; Thereby can be with compressed pixel data and voice data as being the data of benchmark with IP; Send to digital television receiver 31 via HDMI (R) cable 35, digital television receiver 31 can receive compressed pixel data and the voice data of sending from amplifier 32.

Therefore, digital television receiver 31 can send to digital television receiver 34 with the pixel data and the voice data that receive via LAN cable 37.In addition, digital television receiver 31 is decoded the pixel data and the voice data that receive, and based on resulting incompressible pixel data and voice data thus, display image or output sound, thereby reproduction content.

Digital television receiver 34 receives via LAN cable 37 behind the pixel data sent from digital television receiver 31 and the voice data its decoding; And based on passing through resulting incompressible pixel data of decoding and voice data; Display image or output sound, thus content reproduced.Like this, in digital television receiver 31 and digital television receiver 34, can reproduce identical or different contents simultaneously.

In addition; Receive under the situation that is used to reproduce as the pixel data of the program of the content of television broadcasting and voice data at digital television receiver 31; The voice data that receives for example be 5.1 passages around voice data etc.; And when digital television receiver 31 can not be decoded the voice data that is received, digital television receiver 31 was communicated by letter through carrying out IP with amplifier 32, thereby the voice data that receives is sent to amplifier 32 via HDMI (R) 35.

Amplifier 32 receives the voice data sent from digital television receiver 31 and with its decoding, and amplifies decoded voice data as required.Then, reproduce 5.1 passages around sound through the loud speaker (not shown) that is connected to amplifier 32.

Digital television receiver 31 sends voice data via HDMI (R) cable 35 pair amplifiers 32, and the pixel data that receives is decoded, thereby and based on coming the display image playback of programs through the resulting pixel data of decoding.

Like this; In the image delivering system of Fig. 2; Because the electronic equipment of the digital television receiver 31 that is connected through HDMI (R) cable 35 or HDMI (R) cable 36, amplifier 32, transcriber 33 etc. can use HDMI (R) cable and carry out IP at high speed and communicate by letter, so need the LAN cable corresponding with the LAN cable of Fig. 1 17.

In addition; Connect digital television receiver 31 and digital television receiver 34 through LAN cable 37; So digital television receiver 31 can further send to digital television receiver 34 with the data that receive from transcriber 33 via HDMI (R) cable 36, amplifier 32 and HDMI (R) cable 35 via LAN cable 37, therefore also not need with the LAN cable 18 of Fig. 1 and LAN cable or the electronic equipment corresponding with hub 16.

That kind as shown in Figure 1 in image delivering system in the past, according to sending data or the communication mode that receives, needs different types of cable respectively, and the wiring that connects the cable between the electronic equipment is miscellaneous.With respect to this, in image delivering system shown in Figure 2, because between through HDMI (R) electronic equipment that cable connected, the two-way communication that can carry out at high speed that IP communicates by letter etc. is so can simplify the connection of electronic equipment.That is, can simplify the wiring of the cable between the complicated in the past connection electronic equipment more.

Then; Fig. 3 representes through HDMI (R) source built-in in interconnective each electronic equipment of HDMI (R) cable and HDMI (R) receiver, the configuration example of HDMI (R) source that for example in the amplifier 32 of Fig. 2, is provided with and HDMI (R) receiver that in digital television receiver 31, is provided with.

HDMI (R) source 71 is connected through a HDMI (R) cable 35 with HDMI (R) receiver 72, HDMI (R) source 71 and HDMI (R) receiver 72 can keep with current HDMI (R) between interchangeability the time utilize HDMI (R) cable 35 to carry out two-way IP at high speed to communicate by letter.

HDMI (R) source 71 removed as the interval till from a vertical synchronizing signal to next vertical synchronizing signal the interval AP of the interval and vertical tropic of the horizontal tropic interval (below; Also suitably be called the effective video interval) in; Will with the corresponding differential wave of pixel data of the image of incompressible 1 picture amount; Send to HDMI (R) receiver 72 through a plurality of passages along a direction; And in the interval and vertical tropic interval of the horizontal tropic; To voice data or control data and other the corresponding differential waves such as auxiliary data of major general, send to HDMI (R) receiver 72 along a direction through a plurality of passages with accompanying image.

That is, HDMI (R) source 71 comprises conveyer 81.Conveyer 81 for example is transformed to corresponding differential wave with the pixel data of incompressible image, and arrives HDMI (R) receiver 72 that connects via HDMI (R) cable 35 along a direction serial transmission through 3 TMDS passage #0, #1, the #2 as a plurality of passages.

In addition; Conveyer 81 will follow voice data, necessary control data and other the auxiliary data etc. of incompressible image to be transformed to corresponding differential wave, and send to HDMI (R) receiver 72 that connects via HDMI (R) cable 35 along a direction through 3 TMDS passage #0, #1, #2.

In addition, conveyer 81 will with the synchronous pixel clock of pixel data that sends through 3 TMDS passage #0, #1, #2, send to HDMI (R) receiver 72 that connects via HDMI (R) cable 35 through TMDS clock passage.Wherein, in 1 TMDS passage #i (i=0,1,2), send the pixel data of 10 bits at a clock period of pixel clock.

HDMI (R) receiver 72 is interval at effective video; Receive through a plurality of passages from HDMI (R) source 71 along a direction differential wave that send, corresponding with pixel data; And in the interval or vertical tropic interval of the horizontal tropic, receive through a plurality of passages from HDMI (R) source 71 along a direction differential wave that send, corresponding with voice data or control data.

That is, HDMI (R) receiver 72 comprises receiver 82.Receiver 82 and the pixel clock of sending through TMDS clock passage from HDMI (R) source 71 synchronously receive equally through TMDS passage #0, #1, the #2 differential wave that 71 that send along a direction and pixel datas are corresponding from HDMI (R) source that connects via HDMI (R) cable 35 and with voice data or the corresponding differential wave of control data.

In the transmission channel of HDMI (R) system that constitutes by HDMI (R) source 71 and HDMI (R) receiver 72; Except as be used for with pixel clock 3 TMDS passage #0 to #2 of transmission channel synchronously from HDMI (R) the 71 couples of HDMI in source (R) receiver 72 along a direction serial transmission pixel data and voice data; And outside the TMDS clock passage of transmission channel as the transmission pixel clock, also there is DDC (Display Data Channel: DDC) 83 or be called as the transmission channel of CEC line 84.

DDC83 is made up of the two not shown signal line that in HDMI (R) cable 35, comprise, and it uses when HDMI (R) receiver 72 that connects via HDMI (R) cable 35 reads E-EDID (Enhanced Extended Display Identification Data) in HDMI (R) source 71.

That is, HDMI (R) receiver 72 also comprises except comprising receiver 82: EDIDROM (EDID ROM (Read Only Memory) 85, the E-EDID of the information that its storage conduct is relevant with self setting or performance.HDMI (R) receiver 72 of HDMI (R) source 71 from connecting via HDMI (R) cable 35 reads the E-EDID that EDIDROM85 stored of this HDMI (R) receiver 72 via DDC83, and based on this E-EDID; The setting or the performance of identification HDMI (R) receiver 72 are promptly discerned the for example form (profile) of the pairing image of HDMI (R) receiver 72 (electronic equipment that comprises it), for example RGB (Red; Green; Blue), or YCbCr4:4:4, YCbCr4:2:2.

In addition, though not shown, E-EDID also can be stored with HDMI (R) receiver 72 in HDMI (R) source 71 identically, and as required this E-EDID is sent to HDMI (R) receiver 72.

CEC line 84 is made up of a not shown signal line that in HDMI (R) cable 35, comprises, and uses when between HDMI (R) source 71 and HDMI (R) receiver 72, controlling the two-way communication of data of usefulness.

In addition; HDMI (R) source 71 and HDMI (R) receiver 72 are via DDC83 or CEC line 84; To be that the frame of benchmark sends to HDMI (R) receiver 72 and HDMI (R) source 71 for example, thereby can carry out two-way IP communication with IEEE (Institute of Electrical and Electronics Engineers) 802.3.

In addition; In HDMI (R) cable 35, comprise the holding wire 86 that is connected to the pin that is called as Hot Plug Detect; HDMI (R) source 71 and HDMI (R) receiver 72 can utilize this holding wire 86, detect new electronic equipment, be being connected of HDMI (R) receiver 72 and HDMI (R) source 71.

Then, Fig. 4 representes to arrange (pinassignment) with the pin of HDMI (R) cable 35 not shown connectors that be connected, that in HDMI (R) source 71 or HDMI (R) receiver 72, be provided with Fig. 5.

In addition; Among Fig. 4 and Fig. 5; Put down in writing the number of pins of the pin that is used for confirming connector at Zuo Lan (hurdle of PIN), put down in writing by in title with the signal of the determined pin assignments of number of pins of the left hurdle record of delegation at You Lan (hurdle of Signal Assignment).

Fig. 4 representes to be called as the pin of connector of the type A (Type-A) of HDMI (R) and arranges.

2 signal line as the differential signal line of the differential wave TMDS Data#i+ of transmission TMDS passage #i and TMDS Data#i-are connected to pin (number of pins is 1,4,7 pin) that has distributed TMDS Data#i+ and the pin (number of pins is 3,6,9 pin) that has distributed TMDS Data#i-.

In addition, it is 13 pin that the CEC line 84 of the CEC signal of the data that transmission is used as control is connected to number of pins, and number of pins is that 14 pin becomes subsequent use (Reserved) pin.If can utilize this subsequent use pin to carry out two-way IP communication, then can keep and current HDMI (R) between interchangeability.Therefore; The holding wire and the CEC line 84 that are connected to number of pins and are 14 pin shield (shielded) with differential reversing to (twistpair) line; And be connected to CEC line 84 and DDC83 ground wire grounded that number of pins is No. 17 a pin, make it possible to use CEC line 84 and be connected to the signal wire transmits differential wave that number of pins is 14 pin.

In addition; It is 16 pin that the holding wire of SDA (Serial Data) signal of transmission E-EDID etc. is connected to number of pins, when transmission receives as the transmission at the SDA signal synchronously on the holding wire of SCL (Serial Clock) signal of the clock signal used to be connected to number of pins be 15 pin.The DDC83 of Fig. 3 is made up of the holding wire of transmission SDA signal and the holding wire of transmission SCL signal.

In addition; Be connected to the identical ground of holding wire that CEL line 84 and number of pins are 14 pin; The holding wire of the holding wire of transmission SDA signal and transmission SCL signal shields line with differential reversing; And be No. 17 pin ground wire grounded with being connected to number of pins, make it possible to the transmission differential signal.

In addition, to be connected to as number of pins be 19 pin to the transmission holding wire 86 of signal that is used to detect the connection of new electronic equipment.

Fig. 5 representes to be called as the perhaps pin arrangement of the connector of mini type of Type C (Type-C) of HDMI (R).

2 signal line as the differential signal line of the differential wave TMDS Data#i+ of transmission TMDS passage #i and TMDS Data#i-are connected to pin (number of pins is 2,5,8 pin) that has distributed TMDS Data#i+ and the pin (number of pins is 3,6,9 pin) that has distributed TMDS Data#i-.

In addition, it is 14 pin that the CEC line 84 of transmission CEC signal is connected to number of pins, and number of pins is that 17 pin becomes subsequent use (Reserved) pin.The holding wire that is connected to number of pins and is 17 pin and CEC line 84 and the identical ground of situation in type A shield line with differential reversing, and be connected to CEC line 84 and DDC83 ground wire grounded that number of pins is No. 13 a pin.

In addition, it is 16 pin that the holding wire of transmission SDA signal is connected to number of pins, and it is 15 pin that the holding wire of transmission SCL signal is connected to number of pins.In addition, the holding wire of transmission SDA signal and the holding wire of transmission SCL signal and situation in type A shield line with differential reversing identically, and are No. 13 pin ground wire grounded with being connected to number of pins, make it possible to the transmission differential signal.In addition, to be connected to number of pins be 19 pin to the transmission holding wire 86 of signal that is used to detect the connection of new electronic equipment.

Then, Fig. 6 be expression through using the holding wire of the CEC line 84 and the subsequent use pin of the connector that is connected to HDMI (R), carry out figure based on the structure of HDMI (R) source 71 of the IP communication of half-duplex (half duplex) communication mode and HDMI (R) receiver 72.In addition, Fig. 6 is illustrated in the configuration example of the part of the relevant half-duplex operation in HDMI (R) source 71 and HDMI (R) receiver 72.In addition, in Fig. 6, giving identical label, and suitably omit its explanation with the corresponding part of the situation of Fig. 3.

HDMI (R) source 71 is made up of conveyer 81, switch control unit 121 and timing control unit 122.In addition, in conveyer 81, be provided with converter unit 131, decoding unit 132 and switch 133.

In converter unit 131, the two-way IP communication through between HDMI (R) source 71 and HDMI (R) receiver 72 is provided the Tx data as the data of sending from HDMI (R) the 71 couples of HDMI in source (R) receiver 72.The Tx data for example are made up of compressed pixel data or voice data etc.

Converter unit 131 for example is made up of differential amplifier, with the differential wave of the Tx data conversion that is provided for being made up of 2 part signals.In addition, converter unit 131 will be through the resulting differential wave of conversion, via CEC line 84 and the holding wire 141 that is connected to the subsequent use pin of the not shown connector that in conveyer 81, is provided with, sends to receiver 82.Promptly; Converter unit 131 will constitute a part signal through the resulting differential wave of conversion; Offer switch 133 via CEC line 84; Say so via the holding wire that is arranged on conveyer 81 in more detail and be connected to HDMI (R) cable 35 CEC line 84 holding wire and offer switch 133; Another part signal with constituting differential wave offers receiver 82 via holding wire 141, say so via the holding wire that is arranged on conveyer 81 in more detail and be connected to HDMI (R) cable 35 holding wire 141 holding wire and holding wire 141 and offer receiver 82.

Decoding unit 132 for example is made up of differential amplifier, and its input terminal is connected to CEC line 84 and holding wire 141.Decoding unit 132 is based on the control of timing control unit 122; The differential wave that reception is sent with holding wire 141 and from receiver 82 via CEC line 84; The differential wave that promptly is made up of the part signal on part signal on the CEC line 84 and the holding wire 141 is with exporting after the Rx data that are decoded as as original data.Wherein, the Rx data are meant the communication through the two-way IP between HDMI (R) source 71 and HDMI (R) receiver 72, send to the data in HDMI (R) source 71 from HDMI (R) receiver 72, for example are made up of the instruction of the transmission of request pixel data or voice data etc.

In switch 133; In the timing of sending data; Be provided to from the CEC signal in HDMI (R) source 71 or constitute part signal corresponding to the differential wave of Tx data from converter unit 131; Receiving the timing of data, be provided to from the CEC of receiver 82 signal or constitute part signal corresponding to the differential wave of Rx data from receiver 82.Switch 133 is based on the control from switch control unit 121; Select and output from the CEC signal in HDMI (R) source 71 or from the CEC signal of receiver 82; Perhaps constitute part signal, perhaps constitute part signal corresponding to the differential wave of Rx data corresponding to the differential wave of Tx data.

Promptly; Switch 133 sends the timing of data at HDMI (R) the 71 couples of HDMI in source (R) receiver 72; The CEC signal that selection provides from HDMI (R) source 71; Perhaps any from the part signal that converter unit 131 provides, and CEC signal or the part signal selected sent to receiver 82 via CEC line 84.

In addition; Switch 133 is 71 timings that receive from HDMI (R) receiver 72 data sent in HDMI (R) source; The CEC signal that reception is sent from receiver 82 via CEC line 84 or corresponding to the part signal of the differential wave of Rx data, and CEC signal that receives or part signal offered HDMI (R) source 71 or decoding unit 132.

Switch control unit 121 control switchs 133, thereby diverter switch 133 make to select to be provided for any in the signal of switch 133.The reception of the differential wave of timing control unit 122 control decoding units 132 regularly.

In addition, HDMI (R) receiver 72 is made up of receiver 82, timing control unit 123 and switch control unit 124.In addition, in receiver 82, be provided with converter unit 134, switch 135 and decoding unit 136.

Converter unit 134 for example is made up of differential amplifier, in converter unit 134, is provided the Rx data.Converter unit 134 with the differential wave of the Rx data conversion that is provided for being made up of 2 part signals, and will send to conveyer 81 via CEC line 84 and holding wire 141 based on the control of timing control unit 123 through the resulting differential wave of conversion.Promptly; Converter unit 134 will constitute a part signal through the resulting differential wave of conversion; Offer switch 135 via CEC line 84; Say so via the holding wire that is arranged on receiver 82 in more detail and be connected to HDMI (R) cable 35 CEC line 84 holding wire and offer switch 133; Another part signal with constituting differential wave offers conveyer 81 via holding wire 141, say so via the holding wire that is arranged on receiver 82 in more detail and be connected to HDMI (R) cable 35 holding wire 141 holding wire and holding wire 141 and offer conveyer 81.

In switch 135; In the timing that receives data; Be provided to from the CEC of conveyer 81 signal or constitute part signal corresponding to the differential wave of Tx data from conveyer 81; Sending the timing of data, be provided formation from converter unit 134 corresponding to the part signal of the differential wave of Rx data or from the CEC signal of HDMI (R) receiver 72.Switch 135 is based on the control from switch control unit 124; Select and output from the CEC signal of conveyer 81 or from the CEC signal of HDMI (R) receiver 72; Perhaps constitute part signal, perhaps constitute part signal corresponding to the differential wave of Rx data corresponding to the differential wave of Tx data.

Promptly; The timing of switch 135 71 transmission data in HDMI (R) 72 couples of HDMI of receiver (R) source; The CEC signal that selection provides from HDMI (R) receiver 72; Perhaps any from the part signal that converter unit 134 provides, and CEC signal or the part signal selected sent to conveyer 81 via CEC line 84.

In addition; The timing that switch 135 receives from HDMI (R) source 71 data sent at HDMI (R) receiver 72; The CEC signal that reception is sent from conveyer 81 via CEC line 84 or corresponding to the part signal of the differential wave of Tx data, and CEC signal that receives or part signal offered HDMI (R) receiver 72 or decoding unit 136.

Decoding unit 136 for example is made up of differential amplifier, and its input terminal is connected to CEC line 84 and holding wire 141.Decoding unit 136 receives the differential wave of sending from conveyer 81 via CEC line 84 and holding wire 141, the differential wave that promptly constitutes by the part signal on part signal on the CEC line 84 and the holding wire 141, and be decoded as the Tx data of original data and export.

Switch control unit 124 control switchs 135, thereby diverter switch 135 make to select to be provided for any in the signal of switch 135.The transmission of the differential wave of timing control unit 123 control change unit 134 regularly.

In addition; Use CEC line 84 and the holding wire of holding wire 141 that is connected to subsequent use pin and transmission SDA signal and the holding wire of transmission SCL signal in HDMI (R) source 71 and HDMI (R) receiver 72; Carry out under the situation based on the IP of full duplex (full duplex) communication mode communication HDMI (R) source 71 and HDMI (R) receiver 72 such formations for example shown in Figure 7.In addition, in Fig. 7 for give identical label in the corresponding part of the situation of Fig. 6, and suitably omit its explanation.

HDMI (R) source 71 is made up of conveyer 81, switch control unit 121 and switch control unit 171.In addition, in conveyer 81, be provided with converter unit 131, switch 133, switch 181, switch 182 and decoding unit 183.

In switch 181; In the timing of sending data; Be provided to SDA signal, receiving the timing of data, be provided to from the SDA of receiver 82 signal or constitute part signal corresponding to the differential wave of Rx data from receiver 82 from HDMI (R) source 71.Switch 181 is based on the control from switch control unit 171, select and output from the SDA signal in HDMI (R) source 71 or from the SDA signal of receiver 82, perhaps constitute part signal corresponding to the differential wave of Rx data.

Promptly; Switch 181 is 71 timings that receive from HDMI (R) receiver 72 data sent in HDMI (R) source; Reception is via the SDA signal of sending as the sda line 191 of the holding wire of transmission SDA signal and from receiver 82; Offer HDMI (R) source 71 or decoding unit 183 perhaps corresponding to the part signal of the differential wave of Rx data, and with SDA signal that receives or part signal.

In addition, switch 181 will send to receiver 82 from the SDA signal that HDMI (R) source 71 provides in the timing of HDMI (R) the 71 couples of HDMI in source (R) receiver 72 transmission data via sda line 191, perhaps receiver 82 not sent any signal.

In switch 182, sending the timing of data, be provided to SCL signal from HDMI (R) source 71, in the timing that receives data, be provided the part signal corresponding to the differential wave of Rx data of formation from receiver 82.Switch 182 is based on the control from switch control unit 171, selects and output SCL signal or constitute corresponding in the part signal of the differential wave of Rx data any.

Promptly; Switch 182 is 71 timings that receive from HDMI (R) receiver 72 data sent in HDMI (R) source; Reception via as the scl line 192 of the holding wire of transmission SCL signal and 82 that send from receiver, corresponding to the part signal of the differential wave of Rx data; And the part signal that receives offered decoding unit 183, perhaps do not receive any signal.

In addition, switch 182 will send to receiver 82 via scl line 192 from the SCL signal that HDMI (R) source 71 provides in the timing of HDMI (R) the 71 couples of HDMI in source (R) receiver 72 transmission data, perhaps not send any signal.

Decoding unit 183 for example is made up of differential amplifier, and its input terminal is connected to sda line 191 and scl line 192.Decoding unit 183 receives the differential wave of sending from receiver 82 via sda line 191 and scl line 192, the differential wave that promptly constitutes by the part signal on part signal on the sda line 191 and the scl line 192, and be decoded as the Rx data of original data and export.

Switch control unit 171 control switchs 181 and switches 182, thereby diverter switch 181 and switch 182 make in the signal that switch 181 and switch 182 select respectively to be provided any.

In addition, HDMI (R) receiver 72 is made up of receiver 82, switch control unit 124 and switch control unit 172.In addition, in receiver 82, be provided with switch 135, decoding unit 136, converter unit 184, switch 185 and switch 186.

Converter unit 184 for example is made up of differential amplifier, in converter unit 184, is provided the Rx data.Converter unit 184 is the differential wave that is made up of 2 part signals with the Rx data conversion that is provided, and will send to conveyer 81 via sda line 191 and scl line 192 through the resulting differential wave of conversion.That is, the part signal that converter unit 184 will constitute through the resulting differential wave of conversion sends to conveyer 81 via switch 185, and another part signal that constitutes differential wave is sent to conveyer 81 via switch 186.

In switch 185; In the timing of sending data; Be provided formation from converter unit 184 corresponding to the part signal of the differential wave of Rx data or from the SDA signal of HDMI (R) receiver 72, the timing receiving data is provided to the signal from the SDA of conveyer 81.Switch 185 is based on the control from switch control unit 172, and selection and output perhaps perhaps constitute the part signal corresponding to the differential wave of Rx data from the SDA signal of conveyer 81 from the SDA signal of HDMI (R) receiver 72.

Promptly; The timing that switch 185 receives from HDMI (R) source 71 data sent at HDMI (R) receiver 72; The SDA signal that reception is sent from conveyer 81 via sda line 191, and the SDA signal that receives offered HDMI (R) receiver 72, perhaps do not receive any signal.

In addition, the timing of switch 185 71 transmission data, the part signal that the SDA signal that provides from HDMI (R) receiver 72 to conveyer 81 transmissions via sda line 191 perhaps provides from converter unit 184 in HDMI (R) 72 couples of HDMI of receiver (R) source.

In switch 186, sending the timing of data, be provided formation from converter unit 184, corresponding to the part signal of the differential wave of Rx data, the timing receiving data is provided to the signal from the SCL of conveyer 81.Switch 186 is based on the control from switch control unit 172, and selection and output constitute corresponding to the part signal of the differential wave of Rx data or any in the SCL signal.

Promptly; The timing that switch 186 receives from HDMI (R) source 71 data sent at HDMI (R) receiver 72; The SCL signal that reception is sent from conveyer 81 via scl line 192, and the SCL signal that receives offered HDMI (R) receiver 72, perhaps do not receive any signal.

In addition, the timing of switch 186 71 transmission data in HDMI (R) 72 couples of HDMI of receiver (R) source will send to conveyer 81 via scl line 192 from the part signal that converter unit 184 provides, and perhaps not send any signal.

Switch control unit 172 control switchs 185 and switches 186, thereby diverter switch 185 and switch 186 make in the signal that switch 185 and switch 186 select respectively to be provided any.

But, carry out under the situation that IP communicates by letter with HDMI (R) receiver 72 in HDMI (R) source 71, decide according to the structure separately of HDMI (R) source 71 and HDMI (R) receiver 72 and can carry out half-duplex operation and still can carry out full-duplex communication.Therefore, HDMI (R) source 71 is judged with reference to the E-EDID that receives from HDMI (R) receiver 72 as follows, promptly carries out half-duplex operation, still carries out full-duplex communication, still carries out the judgement of the two-way communication of the exchange through the CEC signal.

That kind for example shown in Figure 8, the E-EDID that HDMI (R) source 71 receives is made up of basic module and expansion module.

Beginning at the basic module of E-EDID; The data that standard was determined have been disposed with E-EDID1.3 by " E-EDID 1.3 Basic Structure " expression; Then disposed by " Preferred timing " expression be used to keep with in the past EDID between the timing information of interchangeability, and represent by " 2ndtiming " be used to keep and in the past EDID between " Preferred timing " different timing information of interchangeability.

In addition; In basic module; Then " 2nd timing "; Disposed the information of title that is used to represent display unit successively, and be the information of 4: 3 and 16: 9 o'clock displayable pixel counts for the ratio of width to height by the expression that is used for of " Monitor Range Limits " expression by " Monitor NAME " expression.

With respect to this; Beginning at expansion module; Disposed by the information of loud speaker about " Speaker Allocation " expression relevant; Then disposed successively by the record of " VIDEO SHORT " expression be used to represent displayable picture size, frame rate (frame rate), be the interlacing (interlace) or the data of the information of the information, the ratio of width to height etc. of (progressive) line by line; By the record of " AUDIO SHORT " expression reproducible sound coder mode, sample frequency, by the data of the information of frequency band, codec bit number etc., and by the information of the loud speaker about " Speaker Allocation " expression relevant.

In addition, in expansion module, then " Speaker Allocation " disposed the data that define regularly by each producer by " VenderSpecific " expression, by " 3 RdTiming " expression be used to keep and EDID in the past between the timing information of interchangeability, and by " 4 ThTiming " expression be used to keep and EDID in the past between the timing information of interchangeability.

In addition, the data by " Vender Specific " expression become data structure as shown in Figure 9.That is, in data, be provided with the 0th module to the N module as the module of 1 byte by " Vender Specific " expression.

In the 0th module by the beginning configuration of the data of " Vender Specific " expression, disposed by " Vendor-Specific tag code (=3) " expression be used to represent data " Vender Specific " the data area head and by the information of length that is used to represent data " Vender Specific " of " Length (=N) " expression.

In addition, in the 1st module to the 3 modules, disposed by " 24bit IEEE RegistrationIdentifier (0x000C03) LSB first " expression be used for expression as HDMI (R) with and the information of number " 0x000C03 " of registration.In addition, in the 4th module and the 5th module, disposed respectively the information of physical address of receiver apparatus that is used to represent 24bit by " A ", " B ", " C " and " D " expression.

In the 6th module, disposed by " Supports-AI " expression be used to represent the sign of the pairing function of receiver apparatus, respectively by " DC-48bit ", " DC-36bit " and " DC-30bit " expression be used to specify each pixel bit number each information, by " DC-Y444 " expression be used to represent receiver apparatus whether tackle YCbCr4:4:4 image transmission sign and by " DVI-Dual " expression be used to represent whether receiver apparatus tackles the sign of dual (dual) DVI (Digital Visual Interface).

In addition, in the 7th module, disposed the information of peak frequency of pixel clock that is used to represent TMDS by " Max-TMDS-Clock " expression.In addition; In the 8th module, disposed by " Latency " expression be used to represent video and sound deferred message the sign that has or not, by " FullDuplex " expression be used to represent whether can to carry out full-duplex communication the full duplex sign and by " HalfDuplex " expression be used to represent that the half-duplex that whether can carry out half-duplex operation identifies.

Wherein, Full duplex sign expression HDMI (R) receiver 72 that for example is set up (for example being set to " 1 ") has the situation of the function of carrying out full-duplex communication; Be the situation of structure as shown in Figure 7, full duplex sign expression HDMI (R) receiver 72 of be reset (for example being set to " 0 ") does not have the situation of the function of carrying out full-duplex communication.

Likewise; Half-duplex sign expression HDMI (R) receiver 72 that for example is set up (for example being set to " 1 ") has the situation of the function of carrying out half-duplex operation; Be the situation of structure as shown in Figure 6, half-duplex sign expression HDMI (R) receiver 72 of be reset (for example being set to " 0 ") does not have the situation of the function of carrying out half-duplex operation.

In addition; In the 9th module of the data of representing by " Vender Specific "; Disposed the delay time data of the video of (progressive) line by line by " VideoLatency " expression; In the 10th module, disposed delay time data by the sound of following video line by line of " Audio Latency " expression.In addition; In the 11st module; Be provided with the delay time data of the video of the interlacing of representing by " Interlaced Video Latency " (interlace); In the 12nd module, be provided with the delay time data of the sound of the video of representing by " InterlacedAudio Latency " of following interlacing.

HDMI (R) source 71 is based on full duplex sign and the half-duplex sign that from the E-EDID that HDMI (R) receiver 72 receives, comprises; Judge as follows; Promptly carry out half-duplex operation; Still carry out full-duplex communication, still carry out the judgement of the two-way communication of the exchange through the CEC signal, and carry out the two-way communication with HDMI (R) receiver 72 according to its result of determination.

Be that half-duplex operation can be carried out with HDMI (R) receiver 72 as shown in Figure 6 in HDMI (R) source 71, but can not carry out half-duplex operation with HDMI (R) receiver 72 as shown in Figure 7 under the situation of structure as shown in Figure 6 for example in HDMI (R) source 71.

And, be switched on if be provided with the power supply of the electronic equipment in HDMI (R) source 71, then HDMI (R) source 71 beginning communication process are carried out the corresponding two-way communication of function that is had with HDMI (R) receiver 72 that is connected to HDMI (R) source 71.

Below, with reference to the flow chart of Figure 10, the communication process through HDMI shown in Figure 6 (R) source 71 is described.

In step S11, HDMI (R) source 71 judges on HDMI (R) source 71, whether to have connected new electronic equipment.For example HDMI (R) source 71 judges whether connected the new electronic equipment that has been set up HDMI (R) receiver 72 based on the size to the additional voltage of the pin that is called as Hot Plug Detect that has connected holding wire 86.

In step S11, be judged to be under the situation that does not connect new electronic equipment, owing to do not communicate, communication process finishes.

With respect to this; In step S11, be judged to be under the situation that has connected new electronic equipment, in step S12; Switch control unit 121 control switchs 133; Diverter switch 133 makes and when the transmission of data, selects the CEC signal from HDMI (R) source 71, when the reception of data, selects the CEC signal from receiver 82.

In step S13, HDMI (R) source 71 receives the E-EDID that sends from HDMI (R) receiver 72 via DDC83.Promptly; HDMI (R) receiver 72 is if detect the connection in HDMI (R) source 71; Then read E-EDID, and the E-EDID that reads is sent to HDMI (R) source 71 via DDC83, so HDMI (R) source 71 receives the E-EDID that sends from HDMI (R) receiver 72 from EDIDROM85.

In step S14, the half-duplex operation that whether can carry out with HDMI (R) receiver 72 is judged in HDMI (R) source 71.Promptly; HDMI (R) source 71 is with reference to the E-EDID that receives from HDMI (R) receiver 72; Judge the half-duplex sign " Half Duplex " that whether is set up Fig. 9; For example be set up under the situation of half-duplex sign, HDMI (R) source 71 is judged to be the two-way IP communication that can carry out based on the half-duplex operation mode, promptly can carry out half-duplex operation.

In step S14; Be judged to be and carry out under the situation of half-duplex operation; In step S15; HDMI (R) source 71 is as the channel information that is illustrated in the passage that uses in the two-way communication, will carry out the signal of the intention that the IP based on the half-duplex operation mode of having used CEC line 84 and holding wire 141 communicates by letter, and sends to receiver 82 via switch 133 and CEC line 84.

Promptly; Under the situation that is set up the half-duplex sign; HDMI (R) source 71 can know that HDMI (R) receiver 72 is structures as shown in Figure 6; And can use the half-duplex operation of CEC line 84 and holding wire 141, so channel information is sent to HDMI (R) receiver 72 and notifies the intention of carrying out half-duplex operation.

In step S16; Switch control unit 121 control switchs 133; Diverter switch 133 makes and when the transmission of data, selects the differential wave corresponding to the Tx data from converter unit 131, when the reception of data, selects the differential wave corresponding to the Rx data from receiver 82.

In step S17, the various piece in HDMI (R) source 71 through the half-duplex operation mode carry out with HDMI (R) receiver 72 between two-way IP communicate by letter, communication process finishes.Promptly; When the transmission of data; Converter unit 131 will be a differential wave from the Tx data conversion that HDMI (R) source 71 provides, and a part signal that will constitute through the resulting differential wave of conversion offers switch 133, and another part signal is offered receiver 82 via holding wire 141.Switch 133 will send to receiver 82 from the part signal that converter unit 131 provides via CEC line 84.Like this, the differential wave corresponding to the Tx data sends to HDMI (R) receiver 72 from HDMI (R) source 71.

In addition, when the reception of data, that decoding unit 132 receives is 82 that send from receiver, corresponding to the differential wave of Rx data.That is, that switch 133 receives via CEC line 84 is 82 that send from receiver, corresponding to the part signal of the differential wave of Rx data, and the part signal that receives is offered decoding unit 132.Decoding unit 132 is based on the control of timing control unit 122, will be decoded as the Rx data of original data by the differential wave that part signal that provides from switch 133 and the part signal that provides from receiver 82 via holding wire 141 constitute and outputs to HDMI (R) source 71.

Like this, the exchange of control data or various data such as pixel data, voice data is carried out with HDMI (R) receiver 72 in HDMI (R) source 71.

In addition, at step S14, be judged to be and can not carry out under the situation of half-duplex operation, in step S18, the transmission that the various piece in HDMI (R) source 71 is carried out the CEC signal receives, thus carry out with HDMI (R) receiver 72 between two-way communicating by letter, the communication process end.

Promptly; When the transmission of data; HDMI (R) source 71 sends to receiver 82 via switch 133 and CEC line 84 with the CEC signal; When the reception of data, HDMI (R) source 71 receives the CEC signal of sending from receiver 82 via switch 133 and CEC line 84, thus carry out and HDMI (R) receiver 72 between the exchange of control data.

Like this, HDMI (R) source 71 uses CEC line 84 and holding wire 141 to carry out half-duplex operation with reference to the half-duplex sign with HDMI (R) receiver that can carry out half-duplex operation 72.

Like this; The data that diverter switch 133 is selected to send and the data of reception; Through having used the half-duplex operation of CEC line 84 and holding wire 141 with HDMI (R) receiver 72; Promptly based on the IP of half-duplex operation mode communication, thus can keep with HDMI in the past (R) between interchangeability the time carry out the two-way communication of high speed.

In addition, with 71 identical ground, HDMI (R) source, HDMI (R) receiver 72 also if being provided with the power supply of the electronic equipment of HDMI (R) receiver 72 is switched on, then begins communication process, carries out the two-way communication with HDMI (R) source 71.

Below, with reference to the flow chart of Figure 11, the communication process through HDMI as shown in Figure 6 (R) receiver 72 is described.

In step S41, HDMI (R) receiver 72 judges on HDMI (R) receiver 72, whether to have connected new electronic equipment.For example HDMI (R) receiver 72 judges whether connected the new electronic equipment that has been set up HDMI (R) source 71 based on the size to the additional voltage of the pin that is called as Hot Plug Detect that has connected holding wire 86.

In step S41, be judged to be under the situation that does not connect new electronic equipment, owing to do not communicate, communication process finishes.

With respect to this; In step S41, be judged to be under the situation that has connected new electronic equipment, in step S42; Switch control unit 124 control switchs 135; Diverter switch 135 makes and when the transmission of data, selects the CEC signal from HDMI (R) receiver 72, when the reception of data, selects the CEC signal from conveyer 81.

In step S43, HDMI (R) receiver 72 reads E-EDID from EDIDROM85, and the E-EDID that reads is sent to HDMI (R) source 71 via DDC83.

In step S44, HDMI (R) receiver 72 judges whether received the channel information of sending from HDMI (R) source 71.

That is, the function that is had according to HDMI (R) source 71 and HDMI (R) receiver 72 is sent the channel information of the passage that is used to represent two-way communication from HDMI (R) source 71.For example; Under the 71 such situation about constituting as shown in Figure 6 of HDMI (R) source; Because HDMI (R) source 71 and HDMI (R) receiver 72 can use the half-duplex operation of CEC line 84 and holding wire 141, so send the channel information of the intention that the IP that used CEC line 84 and holding wire 141 communicates by letter from HDMI (R) the 71 couples of HDMI in source (R) receiver 72.HDMI (R) receiver 72 receives the channel information of sending from HDMI (R) source 71 via switch 135 and CEC line 84, and is judged to be and receives channel information.

With respect to this, do not have under the situation of the function of carrying out half-duplex operation in HDMI (R) source 71, owing to do not send channel information,, HDMI (R) receiver 72 do not have receive path information so being judged to be from HDMI (R) the 71 couples of HDMI in source (R) receiver 72.

In step S44; Be judged to be under the situation that has received channel information; Processing proceeds to step S45, switch control unit 124 control switchs 135, diverter switch 135; Make and when the transmission of data, select differential wave, when the reception of data, select differential wave corresponding to the Tx data from conveyer 81 corresponding to the Rx data from converter unit 134.

In step S46, the various piece of HDMI (R) receiver 72 through the half-duplex operation mode carry out with HDMI (R) source 71 between two-way IP communicate by letter.Communication process finishes.Promptly; When the transmission of data; Control based on timing control unit 123; Converter unit 134 will be a differential wave from the Rx data conversion that HDMI (R) receiver 72 provides, and a part signal that will constitute through the resulting differential wave of conversion offers switch 135, and another part signal is sent to conveyer 81 via holding wire 141.Switch 135 will send to conveyer 81 from the part signal that converter unit 134 provides via CEC line 84.Like this, the differential wave corresponding to the Rx data sends to HDMI (R) source 71 from HDMI (R) receiver 72.

In addition, when the reception of data, decoding unit 136 receives the differential wave of sending from conveyer 81 corresponding to the Tx data.That is, that switch 135 receives via CEC line 84 is 81 that send from conveyer, corresponding to the part signal of the differential wave of Tx data, and the part signal that receives is offered decoding unit 136.Decoding unit 136 will be decoded as the Tx data of original data by the differential wave that part signal that provides from switch 135 and the part signal that provides from conveyer 81 via holding wire 141 constitute and output to HDMI (R) receiver 72.

Like this, HDMI (R) receiver 72 carries out the exchange of control data or various data such as pixel data, voice data with HDMI (R) source 71.

In addition, at step S44, be judged to be under the situation that does not have receive path information, in step S47, the transmission that the various piece of HDMI (R) receiver 72 is carried out the CEC signal receives, thus carry out with HDMI (R) source 71 between two-way communicating by letter, the communication process end.

Promptly; When the transmission of data; HDMI (R) receiver 72 sends to conveyer 81 via switch 135 and CEC line 84 with the CEC signal; When the reception of data, HDMI (R) receiver 72 receives the CEC signal of sending from conveyer 81 via switch 135 and CEC line 84, thus carry out and HDMI (R) source 71 between the exchange of control data.

Like this, if HDMI (R) receiver 72 receive path information then use CEC line 84 and holding wire 141 and HDMI (R) receiver 72 to carry out half-duplex operation.

Like this; The data that HDMI (R) receiver 72 diverter switches 135 are selected to send and the data of reception; Through having used the half-duplex operation of CEC line 84 and holding wire 141 with HDMI (R) source 71, thus can keep with HDMI in the past (R) between interchangeability the time carry out the two-way communication of high speed.

In addition; Under the 71 such situation about constituting as shown in Figure 7 of HDMI (R) source; HDMI (R) source 71 is based on the full duplex sign that comprises among the E-EDID and judges that whether HDMI (R) receiver 72 has the function of carrying out full-duplex communication, carries out the two-way communication corresponding with this result of determination in communication process.

Below, with reference to the flow chart of Figure 12, the communication process through HDMI as shown in Figure 7 (R) source 71 is described.

In step S71, HDMI (R) source 71 judges on HDMI (R) source 71, whether to have connected new electronic equipment.In step S71, be judged to be under the situation that does not connect new electronic equipment, owing to do not communicate, communication process finishes.

With respect to this, in step S71, be judged to be under the situation that has connected new electronic equipment; In step S72; Switch control unit 171 control switchs 181 and switch 182, diverter switch 181 and switch 182 make when the transmission of data through the SDA signal of switch 181 selections from HDMI (R) source 71; And through the SCL signal of switch 182 selections from HDMI (R) source 71, and the SDA signal of when the reception of data, selecting from receiver 82 through switch 181.

In step S73, switch control unit 121 control switchs 133, diverter switch 133 makes and when the transmission of data, selects the CEC signal from HDMI (R) source 71, when the reception of data, selects the CEC signal from receiver 82.

In step S74, HDMI (R) source 71 receives the E-EDID that sends from HDMI (R) receiver 72 via the sda line 191 of DDC83.Promptly; HDMI (R) receiver 72 is if detect the connection in HDMI (R) source 71; Then read E-EDID, and the E-EDID that reads is sent to HDMI (R) source 71 via the sda line 191 of DDC83, so HDMI (R) source 71 receives the E-EDID that sends from HDMI (R) receiver 72 from EDIDROM85.

In step S75, the full-duplex communication that whether can carry out with HDMI (R) receiver 72 is judged in HDMI (R) source 71.Promptly; HDMI (R) source 71 is with reference to the E-EDID that receives from HDMI (R) receiver 72; Judge the full duplex sign " Full Duplex " that whether is set up Fig. 9; For example be set up under the situation of full duplex sign, HDMI (R) source 71 is judged to be the two-way IP communication that can carry out based on the full-duplex communication mode, promptly can carry out full-duplex communication.

In step S75; Be judged to be and can carry out under the situation of full-duplex communication, in step S76, switch control unit 171 control switchs 181 and switch 182; Diverter switch 181 and switch 182 make and when the reception of data, select the differential wave corresponding to the Rx data from receiver 82.

Promptly; Switch control unit 171 diverter switches 181 and switch 182; Make when the reception of data the part signal that is chosen in from the part signal of formation that receiver 82 is sent here, sends via sda line 191 through switch 181, select the part signal of sending via scl line 192 through switch 182 corresponding to the differential wave of Rx data.

Because constituting the sda line 191 of DDC83 can not be utilized after E-EDID is sent in HDMI (R) 72 couples of HDMI of receiver (R) source 71 with scl line 192; Promptly do not carry out receiving, so can diverter switch 181 sda line 191 and scl line 192 be utilized as the transmission path based on the Rx data of full-duplex communication with switch 182 via the SDA signal of sda line 191 and scl line 192 or the transmission of SCL signal.

In step S77; HDMI (R) source 71 is as the channel information of the passage of the two-way communication of expression; The signal of the intention that will carry out communicating by letter based on the IP that has used the CEC line 84 and the full-duplex communication mode of holding wire 141, sda line 191 and scl line 192 sends to receiver 82 via switch 133 and CEC line 84.

Promptly; Under the situation that is set up the full duplex sign; HDMI (R) source 71 can know that HDMI (R) receiver 72 is structures as shown in Figure 7; And can use the full-duplex communication of CEC line 84, so channel information is sent to HDMI (R) receiver 72 and notifies the intention of carrying out full-duplex communication with holding wire 141, sda line 191 and scl line 192.

In step S78, switch control unit 121 control switchs 133, diverter switch 133 makes and when the transmission of data, selects the differential wave corresponding to the Tx data from converter unit 131.That is, switch control unit 121 diverter switches 133, make to select from converter unit 131 offer switch 133, corresponding to the part signal of the differential wave of Tx data.

In step S79, the various piece in HDMI (R) source 71 through the full-duplex communication mode carry out with HDMI (R) receiver 72 between two-way IP communicate by letter, communication process finishes.Promptly; When the transmission of data; Converter unit 131 will be a differential wave from the Tx data conversion that HDMI (R) source 71 provides, and a part signal that will constitute through the resulting differential wave of conversion offers switch 133, and another part signal is offered receiver 82 via holding wire 141.Switch 133 will send to receiver 82 from the part signal that converter unit 131 provides via CEC line 84.Like this, the differential wave corresponding to the Tx data sends to HDMI (R) receiver 72 from HDMI (R) source 71.

In addition, when the reception of data, decoding unit 183 receives the differential wave of sending from receiver 82 corresponding to the Rx data.That is, that switch 181 receives via sda line 191 is 82 that send from receiver, corresponding to the part signal of the differential wave of Rx data, and the part signal that receives is offered decoding unit 183.In addition, that switch 182 receives via scl line 192 is 82 that send from receiver, corresponding to another part signal of the differential wave of Rx data, and the part signal that receives is offered decoding unit 183.Decoding unit 183 will be decoded as the Rx data of original data and be outputed to HDMI (R) source 71 by the differential wave that the part signal that provides from switch 181 and switch 182 constitutes.

Like this, the exchange of control data or various data such as pixel data, voice data is carried out with HDMI (R) receiver 72 in HDMI (R) source 71.

In addition, at step S75, be judged to be and can not carry out under the situation of full-duplex communication, in step S80, the transmission that the various piece in HDMI (R) source 71 is carried out the CEC signal receives, thus carry out with HDMI (R) receiver 72 between two-way communicating by letter, the communication process end.

Promptly; When the transmission of data; HDMI (R) source 71 sends to receiver 82 via switch 133 and CEC line 84 with the CEC signal; When the reception of data, HDMI (R) source 71 receives the CEC signal of sending from receiver 82 via switch 133 and CEC line 84, thus carry out and HDMI (R) receiver 72 between the exchange of control data.

Like this, HDMI (R) source 71 is with reference to full duplex sign, uses CEC lines 84 and holding wire 141 and sda line 191 and scl line 192 to carry out full-duplex communication with HDMI (R) receiver that can carry out full-duplex communication 72.

Like this; The data that diverter switch 133, switch 181 and switch 182 are selected to send and the data of reception; Through having used the full-duplex communication of CEC line 84 and holding wire 141 and sda line 191 and scl line 192 with HDMI (R) receiver 72, thus can keep with HDMI in the past (R) between interchangeability the time carry out the two-way communication of high speed.

In addition, be under the situation of structure as shown in Figure 7 at HDMI (R) receiver 72, HDMI (R) receiver 72 and situation at HDMI as shown in Figure 6 (R) receiver 72 communicate identically to be handled and carries out the two-way communication with HDMI (R) source 71.

Below, with reference to the flow chart of Figure 13, the communication process through HDMI as shown in Figure 7 (R) receiver 72 is described.

In step S111, HDMI (R) receiver 72 judges on HDMI (R) receiver 72, whether to have connected new electronic equipment.In step S111, be judged to be under the situation that does not connect new electronic equipment, owing to do not communicate, communication process finishes.

With respect to this, in step S111, be judged to be under the situation that has connected new electronic equipment; In step S112; Switch control unit 172 control switchs 185 and switch 186, diverter switch 185 and switch 186 make when the transmission of data through the SDA signal of switch 185 selections from HDMI (R) receiver 72; The SDA signal of when the reception of data, selecting from conveyer 81 through switch 185, and through the SCL signal of switch 186 selections from conveyer 81.

In step S113, switch control unit 124 control switchs 135, diverter switch 135 makes and when the transmission of data, selects the CEC signal from HDMI (R) receiver 72, when the reception of data, selects the CEC signal from conveyer 81.

In step S114, HDMI (R) receiver 72 reads E-EDID from EDIDROM85, and the E-EDID that reads is sent to HDMI (R) source 71 via the sda line 191 of switch 185 and DDC83.

In step S115, HDMI (R) receiver 72 judges whether received the channel information of sending from HDMI (R) source 71.

That is, the function that is had according to HDMI (R) source 71 and HDMI (R) receiver 72 is sent the channel information of the passage that is used to represent two-way communication from HDMI (R) source 71.For example; Under the 71 such situation about constituting as shown in Figure 7 of HDMI (R) source; Because HDMI (R) source 71 and HDMI (R) receiver 72 can carry out full-duplex communication; So send the channel information of the intention of carrying out communicating by letter from HDMI (R) the 71 couples of HDMI in source (R) receiver 72 based on the IP that has used the CEC line 84 and the full-duplex communication mode of holding wire 141, sda line 191 and scl line 192; Therefore, HDMI (R) receiver 72 receives the channel information of sending from HDMI (R) source 71 via switch 135 and CEC line 84, and is judged to be and receives channel information.

With respect to this, do not have under the situation of the function of carrying out full-duplex communication in HDMI (R) source 71, owing to do not send channel information,, HDMI (R) receiver 72 do not have receive path information so being judged to be from HDMI (R) the 71 couples of HDMI in source (R) receiver 72.

In step S115; Be judged to be under the situation that receives channel information, handle proceeding to step S116, switch control unit 172 control switchs 185 and switch 186; Diverter switch 185 and switch 186 make and when the transmission of data, select the differential wave corresponding to the Rx data from converter unit 134.

In step S117, switch control unit 172 control switchs 135, diverter switch 135 makes and when the reception of data, selects the differential wave corresponding to the Tx data from conveyer 81.

In step S118, the various piece of HDMI (R) receiver 72 through the full-duplex communication mode carry out with HDMI (R) source 71 between two-way IP communicate by letter, communication process finishes.Promptly; When the transmission of data; Converter unit 184 will be a differential wave from the Rx data conversion that HDMI (R) receiver 72 provides, and a part signal that will constitute through the resulting differential wave of conversion offers switch 185, and another part signal is offered switch 186.Switch 185 will send to conveyer 81 via sda line 191 with scl line 192 from the part signal that converter unit 184 provides with switch 186.Like this, the differential wave corresponding to the Rx data sends to HDMI (R) source 71 from HDMI (R) receiver 72.

In addition, when the reception of data, decoding unit 136 receives the differential wave of sending from conveyer 81 corresponding to the Tx data.That is, that switch 135 receives via CEC line 84 is 81 that send from conveyer, corresponding to the part signal of the differential wave of Tx data, and the part signal that receives is offered decoding unit 136.Decoding unit 136 will be decoded as the Tx data of original data by the differential wave that part signal that provides from switch 135 and the part signal that provides from conveyer 81 via holding wire 141 constitute and output to HDMI (R) receiver 72.

Like this, HDMI (R) receiver 72 carries out the exchange of control data or various data such as pixel data, voice data with HDMI (R) source 71.

In addition, at step S115, be judged to be under the situation that does not have receive path information, in step S119, the transmission that the various piece of HDMI (R) receiver 72 is carried out the CEC signal receives, thus carry out with HDMI (R) source 71 between two-way communicating by letter, the communication process end.

Like this, if HDMI (R) receiver 72 receive path information then use CEC line 84 and holding wire 141 and sda line 191 and scl line 192 to carry out full-duplex communication with HDMI (R) receiver 72.

Like this; The data that HDMI (R) receiver 72 diverter switches 135, switch 185 and switch 186 are selected to send and the data of reception; Through having used the full-duplex communication of CEC line 84 and holding wire 141 and sda line 191 and scl line 192 with HDMI (R) source 71, thus can keep with HDMI in the past (R) between interchangeability the time carry out the two-way communication of high speed.

In addition; In the example of Fig. 7; HDMI (R) source 71 is that converter unit 131 is connected to CEC line 84 and holding wire 141; Decoding unit 183 is connected to the structure of sda line 191 and scl line 192, but also can be that decoding unit 183 is connected to CEC line 84 and holding wire 141, and converter unit 131 is connected to the structure of sda line 191 and scl line 192.

At this moment, switch 181 and switch 182 are connected to decoding unit 183 when being connected to CEC line 84 and holding wire 141, and switch 133 is connected to converter unit 131 when being connected to sda line 191.

In addition, the HDMI of Fig. 7 (R) receiver 72 also can likewise constitute, and converter unit 184 is connected to CEC line 84 and holding wire 141, and decoding unit 136 is connected to sda line 191 and scl line 192.At this moment, switch 185 and switch 186 are connected to converter unit 184 when being connected to CEC line 84 and holding wire 141, and switch 135 is connected to decoding unit 136 when being connected to sda line 191.

In addition, in Fig. 6, CEC line 84 also can become sda line 191 and scl line 192 with holding wire 141.Promptly; Also can be that the converter unit 131 in HDMI (R) source 71 and the converter unit 134 of decoding unit 132, HDMI (R) receiver 72 are connected to sda line 191 and scl line 192 with decoding unit 136, carry out communicating by letter based on the IP of half-duplex operation mode with HDMI (R) receiver 72 in HDMI (R) source 71.In addition, at this moment, the connection that also can use the subsequent use pin of the connector that holding wire 141 connected to come detected electrons equipment.

In addition, also can be that HDMI (R) source 71 and HDMI (R) receiver 72 have function of carrying out half-duplex operation and the both sides that carry out the function of full-duplex communication respectively.At this moment, the IP communication based on half-duplex operation mode or full-duplex communication mode can be carried out according to the function that electronic equipment had that is connected with HDMI (R) receiver 72 in HDMI (R) source 71.

Have under the function of carrying out half-duplex operation and the both sides' of the function of carrying out full-duplex communication the situation HDMI (R) source 71 and HDMI (R) receiver 72 such formations for example shown in Figure 14 respectively at HDMI (R) source 71 and HDMI (R) receiver 72.In addition, in Figure 14,, suitably omit its explanation for giving identical label with the corresponding part of the situation of Fig. 6 or Fig. 7.

HDMI shown in Figure 14 (R) source 71 is made up of conveyer 81, switch control unit 121, timing control unit 122 and switch control unit 171; In conveyer 81, be provided with converter unit 131, decoding unit 132, switch 133, switch 181, switch 182 and decoding unit 183.That is, the HDMI of Figure 14 (R) source 71 becomes the timing control unit 122 that in HDMI shown in Figure 7 (R) source 71, also is provided with Fig. 6 and the structure of decoding unit 132.

In addition; HDMI shown in figure 14 (R) receiver 72 is made up of receiver 82, timing control unit 123, switch control unit 124 and switch control unit 172; In receiver 82, be provided with converter unit 134, switch 135, decoding unit 136, converter unit 184, switch 185 and switch 186.That is, the HDMI of Figure 14 (R) receiver 72 becomes the timing control unit 123 that in HDMI shown in Figure 7 (R) receiver 72, also is provided with Fig. 6 and the structure of converter unit 134.

Then, HDMI (R) source 71 of Figure 14 and the communication process of HDMI (R) receiver 72 are described.

At first, with reference to the flow chart of Figure 15, the communication process in HDMI (R) source 71 of Figure 14 is described.In addition, because step S151 is identical to each processing of step S74 with the step S71 of Figure 12 to each processing of step S154, so omit its explanation.

In step S 155, the full-duplex communication that whether can carry out with HDMI (R) receiver 72 is judged in HDMI (R) source 71.That is, the full duplex sign " Full Duplex " that whether is set up Fig. 9 is judged with reference to the E-EDID that receives from HDMI (R) receiver 72 in HDMI (R) source 71.

In step S155; Be judged to be and carry out under the situation of full-duplex communication; Promptly be connected under the situation in HDMI (R) source 71 at Figure 14 or HDMI (R) receiver 72 shown in Figure 7, in step S156, switch control unit 171 control switchs 181 and switch 182; Diverter switch 181 and switch 182 make and when the reception of data, select the differential wave corresponding to the Rx data from receiver 82.

On the other hand, in step S155, be judged to be and can not carry out under the situation of full-duplex communication, in step S 157, HDMI (R) source 71 judges whether can carry out half-duplex operation.That is, the half-duplex sign " Half Duplex " that whether is set up Fig. 9 is judged with reference to the E-EDID that receives in HDMI (R) source 71.In other words, HDMI (R) source 71 judges whether HDMI (R) receiver 72 as shown in Figure 6 is connected to HDMI (R) source 71.

In step S157; Be judged to be and carry out under the situation of half-duplex operation, perhaps in step S156, switched under the situation of switch 181 and switch 182; In step S158, HDMI (R) source 71 sends to receiver 82 with channel information via switch 133 and CEC line 84.

Wherein, In step S155, be judged to be and carry out under the situation of full-duplex communication; Because HDMI (R) receiver 72 has the function of carrying out full-duplex communication; So HDMI (R) source 71, will have been used the signal of the intention that the IP of CEC line 84 and holding wire 141, SDA191 and scl line 192 communicates by letter as channel information, send to receiver 82 with CEC line 84 via switch 133.

In addition; In step S157, be judged to be and carry out under the situation of half-duplex operation; HDMI (R) has the function of carrying out half-duplex operation though receiver 72 does not have the function of carrying out full-duplex communication, so HDMI (R) source 71 is as channel information; To use the signal of the intention that the IP of CEC line 84 and holding wire 141 communicates by letter, send to receiver 82 with CEC line 84 via switch 133.

In step S159; Switch control unit 121 control switchs 133; Diverter switch 133 makes and when the transmission of data, selects the differential wave corresponding to the Tx data from converter unit 131, when the reception of data, selects the differential wave of sending from receiver 82 corresponding to the Rx data.In addition; Carry out under the situation of full-duplex communication in HDMI (R) source 71 and HDMI (R) receiver 72; Because during the reception of the data in HDMI (R) source 71; Can not send differential wave via CEC line 84 and holding wire 141, so the differential wave corresponding to the Rx data is not provided to decoding unit 132 from receiver 82 corresponding to the Rx data.

In step S160, the various piece in HDMI (R) source 71 carries out communicating by letter with the two-way IP of HDMI (R) receiver 72, and communication process finishes.

Promptly; 71 carry out the situation of full-duplex communication and carry out under the situation of half-duplex operation with HDMI (R) receiver 72 in HDMI (R) source; When the transmission of data; Converter unit 131 will be a differential wave from the Tx data conversion that HDMI (R) source 71 provides, and a part signal that will constitute through the resulting differential wave of conversion sends to receiver 82 via switch 133 and CEC line 84, and another part signal is sent to receiver 82 via holding wire 141.

In addition; 71 carry out under the situation of full-duplex communication with HDMI (R) receiver 72 in HDMI (R) source; When the reception of data; Decoding unit 183 receives the differential wave of sending from receiver 82 corresponding to the Rx data, and the differential wave that receives is decoded as the Rx data of original data and outputs to HDMI (R) source 71.

With respect to this; 71 carry out under the situation of half-duplex operation with HDMI (R) receiver 72 in HDMI (R) source; When the reception of data; Decoding unit 132 receives the differential wave of sending from receiver 82 corresponding to the Rx data based on the control of timing control unit 122, and the differential wave that receives is decoded as the Rx data of original data and outputs to HDMI (R) source 71.

Like this, the exchange of control data or various data such as pixel data, voice data is carried out with HDMI (R) receiver 72 in HDMI (R) source 71.

In addition, in step S157, be judged to be and carry out under the situation of half-duplex operation; In step S161; The various piece in HDMI (R) source 71 receives via the transmission that CEC line 84 carries out the CEC signal, thus carry out with HDMI (R) receiver 72 between two-way communicating by letter, the communication process end.

Like this, HDMI (R) source 71 according to the function that HDMI (R) receiver 72 as communication counterpart is had, is carried out full-duplex communication or half-duplex operation with reference to full duplex sign and half-duplex sign.

Like this; The function that is had according to HDMI (R) receiver 72 as communication counterpart; The data that diverter switch 133, switch 181 and switch 182 are selected to send and the data of reception; Carry out full-duplex communication or half-duplex operation, thus can keep and HDMI in the past (R) between interchangeability the time select communication means more suitably to carry out two-way communication at a high speed.

Then, with reference to the flow chart of Figure 16, the communication process of HDMI (R) receiver 72 of Figure 14 is described.In addition, because step S191 is identical to each processing of step S114 with the step S111 of Figure 13 to each processing of step S194, so omit its explanation.

In step S 195, HDMI (R) receiver 72 receives the channel information of sending from HDMI (R) source 71 via switch 135 and CEC line 84.In addition; Owing to neither have the function of carrying out full-duplex communication in HDMI (R) source 71 that is connected to HDMI (R) receiver 72; Do not have under the situation of the function of carrying out half-duplex operation yet; Can not send channel information, so HDMI (R) receiver 72 can receive path information from HDMI (R) the 71 couples of HDMI in source (R) receiver 72.

In step S 196, HDMI (R) receiver 72 is judged and whether is carried out full-duplex communication based on the channel information that receives.For example, HDMI (R) receiver 72 is judged to be and carries out full-duplex communication under the situation of the channel information that receives the intention that the IP that used CEC line 84 and holding wire 141, sda line 191 and SCL192 communicates by letter.

In step S 196; Be judged to be under the situation of carrying out full-duplex communication, in step S197, switch control unit 172 control switchs 185 and switch 186; Diverter switch 185 and switch 186 make and when the transmission of data, select the differential wave corresponding to the Rx data from converter unit 184.

In addition, in step S196, be judged to be and can not carry out under the situation of full-duplex communication, in step S198, HDMI (R) receiver 72 is judged and whether is carried out half-duplex operation based on the channel information that receives.For example, HDMI (R) receiver 72 is judged to be and carries out half-duplex operation under the situation of the channel information that receives the intention that the IP that used CEC line 84 and holding wire 141 communicates by letter.

In step S198, be judged to be and carry out half-duplex operation; Perhaps in step S197, switched under the situation of switch 185 and switch 186; In step S199, switch control unit 124 control switchs 135, diverter switch 135; Make and when the transmission of data, select differential wave, when the reception of data, select differential wave corresponding to the Tx data from conveyer 81 corresponding to the Rx data from converter unit 134.

In addition; 71 carry out under the situation of full-duplex communication with HDMI (R) receiver 72 in HDMI (R) source; Because during the transmission of the data in HDMI (R) receiver 72; Can be from the differential wave of 134 pairs of conveyers of converter unit, 81 transmissions, so the differential wave corresponding to the Rx data can be provided in switch 135 corresponding to the Rx data.

In step S200, the various piece of HDMI (R) receiver 72 is carried out two-way IP with HDMI (R) source 71 and is communicated by letter the communication process end.

Promptly; Carry out under the situation of full-duplex communication in HDMI (R) receiver 72 and HDMI (R) source 71; When the transmission of data; Converter unit 184 will be a differential wave from the Rx data conversion that HDMI (R) receiver 72 provides, and will constitute through a part signal in the resulting differential wave of conversion and send to conveyer 81 via switch 185 and sda line 191, and another part signal is sent to conveyer 81 via switch 186 with scl line 192.

In addition; Carry out under the situation of half-duplex operation in HDMI (R) receiver 72 and HDMI (R) source 71 and carry out under the situation of half-duplex operation; When the transmission of data; Converter unit 134 will be a differential wave from the Rx data conversion that HDMI (R) receiver 72 provides, and will constitute through a part signal in the resulting differential wave of conversion and send to conveyer 81 via switch 135 and CEC line 84, and another part signal is sent to conveyer 81 via holding wire 141.

In addition; Carry out under the situation of full-duplex communication in HDMI (R) receiver 72 and HDMI (R) source 71; When the reception of data; Decoding unit 136 receives the differential wave of sending from conveyer 81 corresponding to the Tx data, and the differential wave that receives is decoded as the Tx data of original data and outputs to HDMI (R) receiver 72.

In addition, in step S198, be judged to be and carry out under the situation of half-duplex operation; Promptly; For example do not send under the situation of channel information, in step S201, the transmission that the various piece of HDMI (R) receiver 72 is carried out the CEC signal receives; Thereby carry out with HDMI (R) source 71 between two-way communicating by letter, communication process finishes.

Like this, HDMI (R) receiver 72 is according to the channel information that receives, and the function that is promptly had according to HDMI (R) source 71 as communication counterpart is carried out full-duplex communication or half-duplex operation.

Like this; The function that is had according to HDMI (R) source 71 as communication counterpart; The data that diverter switch 135, switch 185 and switch 186 are selected to send and the data of reception; Carry out full-duplex communication or half-duplex operation, thus can keep and HDMI in the past (R) between interchangeability the time select communication means more suitably to carry out two-way communication at a high speed.

In addition; Through comprise each other with differential reverse to line shield and with ground wire grounded CEC line 84 and holding wire 141 and each other with differential reverse to line shield and with the ground wire grounded sda line 191 and HDMI (R) cable 35 of scl line 192; Connect HDMI (R) source 71 and HDMI (R) receiver 72, thus can keep with in the past HDMI (R) cable between interchangeability the time carry out communicating by letter based on the two-way IP of the high speed of half-duplex operation mode or full-duplex communication mode.

Such as stated; Any that will be in the data of one or more transmissions selected as the data that will send; The data of selecting are sent to communication counterpart via the holding wire of regulation, and any the data of the one or more receptions that will send from communication counterpart selected selected data as the data that will receive; Thereby between HDMI (R) source 71 and HDMI (R) receiver 72; Can keep interchangeability as HDMI (R), promptly can be with the pixel data of incompressible image from HDMI (R) the 71 couples of HDMI in source (R) receiver 72 along a direction high-speed transfer, and can carry out the IP communication of at a high speed two-way via HDMI (R) cable 35.

Its result; Built-in HDMI (R) source 71, for example the source device as the electronic equipment of transcriber 33 of Fig. 2 etc. has the function of the server of DLNA (Digital Living Network Alliance) etc.; And built-in HDMI (R) receiver 72, for example have under the situation of the communication interface that the LAN of Ethernet (registered trade mark) etc. uses as the receiver apparatus of the electronic equipment of digital television receiver 31 of Fig. 2 etc.; For example through via directly or the two-way IP communication of the electronic equipment of amplifier 32 grades that connect through HDMI (R) cable; Can be from source device to receiver apparatus via HDMI (R) cable transmission content; And then other equipment of the communication interface of the LAN that is connected to this receiver apparatus being used from receiver apparatus (for example, the digital television receiver 34 of Fig. 2 etc.) transmission is from the content of source device.

In addition; Communicate by letter with two-way IP between HDMI (R) receiver 72 according to HDMI (R) source 71; Therefore instruction or response that can exchange at high speed is used to control between the source device in that connect through HDMI (R) cable 35, built-in HDMI (R) source 71 and the built-in receiver apparatus of HDMI (R) receiver 72 can become the fast equipment room control of response.

Then, above-mentioned a series of processing also can be carried out through the hardware of special use, also can carry out through software.Carrying out through software under the situation of a series of processing, the program that constitutes its software is installed to microcomputer of for example controlling HDMI (R) source 71 or HDMI (R) receiver 72 etc.

Therefore, Figure 17 representes to carry out the formation example of an execution mode of the computer that the program of above-mentioned a series of processing installs.

Program can be recorded among EEPROM (the Electrically Erasable Programmable Read-only Memory) 305 or ROM303 as built-in recording medium in computer in advance.

Perhaps, program can also temporary transient or permanently be stored (record) in the detachable recording medium of floppy disk, CD-ROM (Compact Disc Read Only Memory), MO (Magneto Optical) dish, DVD (DigitalVersatile Disc), disk, semiconductor memory etc.Detachable recording medium like this can be used as so-called combination (package) software and provides.

In addition; Program is installed to the computer from detachable recording medium except above-mentioned that kind; The moonlet that can also use via digital satellite broadcasting from download site and being wirelessly transmitted to the computer, perhaps via networks such as LAN, internets and wire transmission in computer, in computer; Receive the program that transmits like this through input/output interface 306, and be installed among the built-in EEPROM305.

Built-in computer CPU (Central Processing Unit) 302.In CPU302, connect input/output interface 306 via bus 302, CPU302 will program stored be loaded into RAM (Random Access Memory) 304 and carry out in ROM (Read Only Memory) 303 or EEPROM305.Like this, CPU302 carries out the processing according to above-mentioned flow chart, the processing of perhaps carrying out according to the formation of above-mentioned block diagram.

Wherein, In this manual; Recorded and narrated and be used to make computer to carry out the treatment step of the program of various processing; Do not need and also to comprise side by side or the processing of carrying out individually (for example, the processing of processing or based target side by side) along the order of putting down in writing as flow process by the time series processing.

In addition, program also can be the program through a Computer Processing, also can be the program through a plurality of computer dispersion treatment.

In addition; The present invention is except HDMI (R); Can also be applicable in the communication interface that constitutes by following dispensing device and following receiving system; Promptly has removed in the interval AP interval of the interval and vertical tropic of the horizontal tropic in the interval till conduct is from a vertical synchronizing signal to next vertical synchronizing signal; Will with the corresponding differential wave of pixel data of the image of incompressible 1 picture amount, send to the dispensing device of receiving system through a plurality of passages along a direction, and receive the receiving system of the differential wave of sending through a plurality of passages from dispensing device.

In addition; In this execution mode; Through between HDMI (R) source 71 and HDMI (R) receiver 72; Come the selection timing of control data or reception timing, the transmission timing of differential wave as required, thereby carry out two-way IP communication, but two-way communication can also be carried out through IP agreement in addition.

In addition, execution mode of the present invention is not limited to above-mentioned execution mode, in the scope that does not break away from intention of the present invention, can carry out various changes.

According to the execution mode of above explanation, can carry out two-way communication.Especially, for example can with the pixel data of incompressible image and the voice data of following this image in the communication interface of a direction high-speed transfer, carry out two-way communication at a high speed when interchangeability can be kept.

But though the part that repeats with the technology of having narrated is arranged, a lot of video sound devices are that purpose is installed the LAN communication function with two-way program audiovisual, the remote control of height, the reception of electric program guide etc.

As the parts that between the video sound device, form its network, the option of the laying of the private cable such, radio communication, electric wire communication etc. just like CAT5.

But private cable connects the shortcoming that exists complicated modulation circuit and transmitter-receiver to become high price with miscellaneousization of connection between the equipment at wireless or electric wire.

Therefore, in above-mentioned execution mode, the technology that need not in HDMI, to append new connector electrode and append the LAN communication function is disclosed.

Because HDMI is transfer of data and the exchange of connection device information and the interface of communicating by letter of authentication and device control data that carries out video and sound with a cable, so append the LAN function and to need not to use private cable and wireless grade also can carry out the advantage that LAN communicates by letter very big at it.

But,, be used for the exchange of differential transmission path double as connection device information and the communicating by letter of authentication and device control data of LAN communication as above-mentioned execution mode and disclosed technology is.

In HDMI, the connection device electric characteristics is all being limited by strictness aspect parasitic capacitance or the impedance in the CEC that communicates by letter of the DDC of the exchange of carrying out connection device information and authentication neutralization carrying out device control data.

Specifically, the DDC terminal parasitic capacitance of equipment must be below 50pF, and impedance is below 200 Ω when LOW exports, with HIGH state that ground wire GND is connected under for about 2k Ω, thereby need be with drawing on the power supply.

On the other hand, in the LAN communication of transmitting high speed signal, stable for what communicate by letter, transmitting and receiving terminal at least must be to be terminated about 100 Ω in high frequency band.

Figure 19 is that expression will be connected all the time with the DDC line of in the past HDMI source device 401 and receiver apparatus 402 to be used for the transmitter 404 that LAN communicates by letter and carry out the situation that AC is coupled with transmitter 405.

In order to satisfy the parasitic capacitance restriction of DDC; The LAN transmitter/receiver circuit that is appended to the DDC line need have the AC coupling via fully little electric capacity; Lan signal receives distortion than high attenuation, so there are the complicated and misgivings at high price that become of the transmitter/receiver circuit of this distortion of compensation.

In addition, in DDC communication, existence changes at HIGH and LOW can hinder the misgivings that LAN communicates by letter.That is, exist in the inoperative misgivings of LAN in the DDC communication period.

Therefore; Below; As further preferred embodiment, the communication system with following characteristic is described, promptly basically with a cable carry out video and sound transfer of data, connection device information exchange and authentication, device control data communicate by letter and the interface of LAN communication in; Communicate by letter through carry out LAN via the two-way communication of pair of differential transmission path, and come the characteristic of the connection status of notification interface through at least one the DC bias potential in the transmission path.

In the technology of following explanation, do not need as above-mentioned execution mode, must have selected cell.

Figure 18 is the circuit diagram of the 1st configuration example of the communication system of the expression connection status of coming notification interface through at least one the DC bias potential in the transmission path.

The figure of the configuration example of the system when Figure 19 is expression adding Ethernet (registered trade mark) (Ethernet (registered trade mark)).

Shown in figure 18; This communication system 400 comprises: LAN function expansion HDMI (below, be called EH) source device 401, EH receiver apparatus 402, connect EH cable 403, Ethernet (registered trade mark) conveyer 404 and Ethernet (registered trade mark) receiver 405 of EH source device and EH receiver apparatus.

EH source device 401 comprises: resistance 432 and the electric capacity 433 and the comparator 434 of lan signal transtation mission circuit 411, terminal resistance 412, AC coupling capacitance 413,414, lan signal receiving circuit 415, subtraction circuit 416, pull-up resistor 421, the resistance 422 that forms low pass filter and electric capacity 423, comparator 424, pull down resistor 431, formation low pass filter.

EH receiving equipment 402 comprises: lan signal transtation mission circuit 441, terminal resistance 442, AC coupling capacitance 443,444, lan signal receiving circuit 445, subtraction circuit 446, pull down resistor 451, the resistance 452 that forms low pass filter and electric capacity 453, comparator 454, choking-winding 461 and the resistance 462 and 463 that between power supply potential and reference potential, is connected in series.

In EH cable 403; The differential transmission path that is made up of siding 501 and HPD line 502 is arranged, and formed the source terminal 511 of siding 501 and source terminal 512, the receiver-side terminal 521 of siding 501 and the receiver-side terminal 522 of HPD line of HPD line 502.Siding 501 and HPD line 502 are as differential reverse (twist pair) and line.

In the communication system with such structure 400, in source device 401, terminal 511 is connected to terminal resistance 412, lan signal transtation mission circuit 411 and lan signal receiving circuit 415 with terminal 512 via AC coupling capacitance 413,414.

Subtraction circuit 416, the electric current that receives 411 outputs of lan signal transtation mission circuit produce terminal resistance 412 and transmission path 501,502 as load signal voltage transmission and as be 402 transmissions of EH receiver apparatus signal reception voltage signal with signal SG412.

In subtraction circuit 416, be positive signal from the receiver transmission from deducting the signal SG413 that sends signal SG411 with signal SG412.

Same circuit network is also arranged in receiver apparatus 402, and through these circuit, source device 4011 is carried out two-way LAN with receiver apparatus 402 and is communicated by letter.

In addition, HPD line 502 also transmits the situation that cable 403 is connected to receiver apparatus 402 through DC biasing grade to source device 401 except above-mentioned LAN communication.

If cable 403 is connected to receiver apparatus 402, then resistance 462,463 and the choking-winding 461 in the receiver apparatus 402 is biased to about 4V with HPD line 502 via terminal 522.

Source device 401 is setovered through the DC that the low pass filter that is made up of resistance 432 and electric capacity 433 extracts HPD line 502, and (for example, 1.4V) compares with reference potential Vref2 through comparator 434.

If cable 403 is not connected to source device 402, then the current potential of terminal 512 is through pull down resistor 431 and lower than reference potential Vref2, if connect then high.

Therefore, if the output signal SG415 of comparator 434 is HIGH, represent that then cable 403 is connected with receiver apparatus 402.

On the other hand, if the output signal SG415 of comparator 434 is LOW, represent that then cable 403 is not connected with receiver apparatus 402.

In this 1st configuration example, also having through the DC bias potential of siding 501 equipment of discerning the two ends that are connected to cable 403 each other is EH reply equipment, also is the function of the HDMI equipment of non-reply.

EH source device 401 through resistance 421 with draw on the siding 501 (+5V), EH receiver apparatus 402 is drop-down through resistance 451.

These resistance 421,451 do not exist in the non-reply equipment of EH.

EH source device 401 is through comparator 424, and the DC current potential and the reference voltage V ref1 of the siding 501 of the low pass filter that will pass through to be made up of resistance 422 and electric capacity 423 compare.

Receiver apparatus 402 is in EH reply and exist when drop-down, and the current potential of siding 501 becomes 2.5V, in non-reply and when open, becomes 5V, so if reference potential Vref1 is made as 3.75V, then can discern the correspondence/non-reply of receiver apparatus.

Receiver apparatus 402 is through comparator 454, and the DC current potential and the reference voltage V ref3 of the siding 501 of the low pass filter that will pass through to be made up of resistance 452 and electric capacity 453 compare.

When source device draws function in the EH reply and on having; Become 2.5V; When non-reply; Become 0V, so, then can discern the EH correspondence/non-reply of source device if reference potential is made as 1.25V.

Like this; According to this 1st configuration example; The exchange of the transfer of data of carrying out video and sound with a cable 403, connection device information and authentication, device control data communicate by letter and the interface of LAN communication in; LAN communication is through carrying out via the two-way communication of pair of differential transmission path, and the connection status of coming notification interface through at least one the DC bias potential in the transmission path is not so can relate to the apart of LAN communication through physics mode to scl line, sda line.

Its result is cut apart the circuit that can be formed for LAN communication and irrelevant with the electrical standard about the DDC defined through this, realizes stable cheaply and LAN communication reliably.

In addition, also can be not in EH source device 401 at pull-up resistor shown in Figure 180 421, and be arranged in the EH cable 403.At this moment, the terminal of pull-up resistor 421 is connected respectively to siding 501 in the line that in EH cable 403, is provided with and the line (holding wire) that is connected to power supply (power supply potential).

In addition, pull down resistor shown in Figure 180 451 and resistance 463 also can be in EH receiver apparatus 402, and are arranged in the EH cable 403.At this moment, the terminal of pull down resistor 451 line (ground wire) that is connected respectively in EH cable 403 siding 501 in the line that is provided with and is connected to ground (reference potential).In addition, the terminal of resistance 463 line (ground wire) that is connected respectively in EH cable 403 the HPD line 502 in the line that is provided with and is connected to ground (reference potential).

Figure 20 is the circuit diagram of the 2nd configuration example of the communication system of the expression connection status of having notified interface through at least one the DC bias potential in transmission path.

Identical with the 1st configuration example basically ground of this communication system 600; Have following structure: the exchange of the transfer of data of carrying out video and sound with a cable, connection device information and authentication, device control data communicate by letter and the interface of LAN communication in; LAN communication is carried out through the one-way communication via 2 pairs of differential transmission paths; Notified the structure of the connection status of interface through at least one the DC bias potential in transmission path; In addition, it is characterized in that at least two transmission paths partitioning scheme when communicating by letter with LAN is used for the exchange of connection device information and communicating by letter of authentication.

Shown in figure 20, this communication system 600 comprises: LAN function expansion HDMI (below, be called EH) source device 601, EH receiver apparatus 602, connect the EH cable 603 of EH source device and EH receiver apparatus.

EH source device 601 comprises: lan signal transtation mission circuit 611; Terminal resistance 612; 613; AC coupling capacitance 614~617; Lan signal receiving circuit 618; Inverter 620; Resistance 621; Form the resistance 622 and electric capacity 623 of low pass filter; Comparator 624; Pull down resistor 631; Form the resistance 632 and electric capacity 633 of low pass filter; And comparator 634; NOR gate 640; Analog switch 641~644; Inverter 635; Analog switch 646; 747; DDC transceiver 651; 652; And pull-up resistor 653; 654.

EH receiving equipment 602 comprises: resistance 672 and electric capacity 673, comparator 674, choking-winding 681, the resistance 682 and 683 that between power supply potential and reference potential, is connected in series, analog switch 691~694, inverter 695, analog switch 696,697, DDC transceiver 701,702 and the pull-up resistor 703 of lan signal transtation mission circuit 661, terminal resistance 662,663, AC coupling capacitance 664~667, lan signal receiving circuit 668, pull down resistor 671, formation low pass filter.

In EH cable 603, differential transmission path that is made up of siding 801 and scl line 803 and the differential transmission path that is made up of sda line 804 and HPD line 802 are arranged, and formed their source terminal 811~814 and receiver-side terminal 821~824.

Siding 801 and scl line 803 and sda line 804 and HPD line 802 are as differential reverse (twist pair) and line.

In the communication system with such structure 600; In source device 601, terminal 811,813 is via AC coupling capacitance 614,615 and analog switch 641,642 and be connected to LAN is sent transtation mission circuit 611 and the terminal resistance 612 that signal SG611 sends to receiver.

Terminal 814,812 is via AC coupling capacitance 616,617 and analog switch 643,644 and be connected to receiving circuit 618 and the terminal resistance 613 of reception from the lan signal of receiver apparatus 602.

In receiver apparatus 602, terminal 821~824 is via AC coupling capacitance 664,665,666,667 and analog switch 691~694 and be connected to transmitter/receiver circuit 668,661 and terminal resistance 662,663.

Analog switch 641~644,691~694 conducting when carrying out LAN communication, open when carrying out DDC communication.

Source device 601 is connected to DDC transceiver 651,652 and pull-up resistor 653,654 with terminal 813 and terminal 814 via other analog switch 646,647.

Receiver apparatus 602 is connected to DDC transceiver 701,702 and pull-up resistor 703 with terminal 823 and terminal 824 via analog switch 696,697.

Analog switch 646,647,696,697 conducting when carrying out DDC communication, open when carrying out DLAN communication.

Except the resistance 62 at source device 601 was driven by inverter 620, the situation with the 1st configuration example was identical basically based on the identification mechanism of the EH reply equipment of the current potential of siding 801.

Inverter 620 be input as HIGH the time, resistance 621 becomes pull down resistor, so from receiver apparatus 602, become the 0V state with the situation that has connected the non-reply equipment of EH identically.

Its result; The signal SG623 of the EH reply recognition result of expression receiver apparatus 602 becomes LOW; Analog switch that signal SG623 is controlled 691~694 is open, through inverter 695 analog switch 696,697 conductings that the signal of signal SG623 controls of having reversed.

Its result, receiver apparatus 602 cuts off scl line 803 and sda line 804 from the LAN transmitter-receiver, become the state that is connected to the DDC transmitter-receiver.

On the other hand, in source device 601, the input of inverter 620 also is input to NOR gate 640, thereby its output SG614 is made as LOW.

Analog switch that the output signal SG614 of NOR gate 640 is controlled 641~644 is open, through inverter 645 analog switch 646,647 conductings that the signal of signal SG614 controls of having reversed.

Its result, source device 601 also cuts off scl line 803 and sda line 804 from the LAN transmitter-receiver, become the state that is connected to the DDC transmitter-receiver.

On the contrary, inverter 620 be input as LOW the time, source device 601 all cuts off scl line 803 and sda line 804 with receiver apparatus 602 simultaneously from the DDC transmitter-receiver, become the state that is connected to the LAN transmitter-receiver.

Being used to of DC bias potential through HPD line 802 confirms that the circuit 631~634,681~683 that connects has and the 1st configuration example identical functions.

That is, HPD line 802 also transmits the situation that cable 803 is connected to receiver apparatus 602 through DC biasing grade to source device 601 except above-mentioned LAN communication.

If cable 603 is connected to receiver apparatus 602, then resistance 682,683 and the choking-winding 681 in the receiver apparatus 602 is biased to about 4V with HPD line 802 via terminal 822.

Source device 601 is setovered through the DC that the low pass filter that is made up of resistance 632 and electric capacity 633 extracts HPD line 802, and (for example, 1.4V) compares with reference potential Vref2 through comparator 634.

If cable 603 is not connected to source device 602, then the current potential of terminal 812 is through pull down resistor 631 and lower than reference potential Vref2, if connect then high.

Therefore, if the output signal SG613 of comparator 634 is HIGH, represent that then cable 803 is connected with receiver apparatus 602.

On the other hand, if the output signal SG613 of comparator 634 is LOW, represent that then cable 603 is not connected with receiver apparatus 602.

Like this; According to this 2nd configuration example; Have following structure: the exchange of the transfer of data of carrying out video and sound with a cable, connection device information and authentication, device control data communicate by letter and the interface of LAN communication in; LAN communication is carried out through the one-way communication via 2 pairs of differential transmission paths, comes the structure of the connection status of notification interface through at least one the DC bias potential in the transmission path, in addition; It is characterized in that; At least two transmission paths partitioning scheme when communicating by letter with LAN is used for the exchange of connection device information and communicating by letter of authentication, thus can be divided into through switch scl line, sda line are connected to the time period of LAN telecommunication circuit and be connected to the DDC circuit time period the time cut apart, cut apart through this; The circuit that can be formed for LAN communication is and irrelevant with the electrical standard about the DDC defined, and realization is stablized and LAN communication reliably cheaply.

In addition, also can be not in EH source device 601 at resistance shown in Figure 20 621, and be arranged in the EH cable 603.At this moment, the terminal of resistance 621 is connected respectively to siding 801 in the line that in EH cable 603, is provided with and the line (holding wire) that is connected to power supply (power supply potential).

In addition, pull down resistor shown in Figure 20 671 and resistance 683 also can be in EH receiver apparatus 602, and are arranged in the EH cable 603.At this moment, the terminal of pull down resistor 671 line (ground wire) that is connected respectively in EH cable 603 siding 801 in the line that is provided with and is connected to ground (reference potential).In addition, the terminal of resistance 683 line (ground wire) that is connected respectively in EH cable 603 the HPD line 802 in the line that is provided with and is connected to ground (reference potential).

That kind as described above, with execution mode that Fig. 2~Figure 17 is associated in, SDA and the SCL of HDMI19 in extremely is differential right as the 1st, CEC and Reserved as the 2nd pair, have been realized carrying out the full-duplex communication of one-way communication in separately.

But, being made as SDA and SCL and carrying out H and draw on the 1.5K Ω and L is low-impedance drop-down communicating by letter, CEC also carries out H and draws on the 27K Ω and L is low-impedance drop-down communication.

In order to hold the function that the function that keeps them with the compatibility of HDMI in the past can cause being difficult to share the LAN of the high-speed data communication that carries out need the terminal of transmission line being made as the matched termination.

Therefore, in the 1st configuration example, avoid the use of SDA, SCL, CEC line, and with Reserved and HPD as differential right, carry out full-duplex communication based on 1 pair of two-way communication.

Because HPD is based on the id signal of DC level, so can satisfy the injection of the lan signal through the AC coupling and based on both of the transmission of the identification information of DC level.In Reserved, newly append through coming identification each other to have function based on the terminal of the LAN function of DC level with the HPD similar methods.

In the 2nd configuration example, it is differential right to constitute through HPD, SDA, SCL and 2 pairs of Reserved formations, carries out 2 pairs of full-duplex communications of one-way communication separately.

In HDMI, communicating by letter all the time based on the DDC of the burst shape (burst like) of SDA and SCL, transmitter is main frame and controls it regularly.

In this example, the operation simulation switch makes when transmitter carries out DDC communication, and SDA, scl line are connected to the transceiver that DDC uses, and when not carrying out DDC communication, line is connected to the transceiver that LAN uses.

This switching operation signal also is delivered to receiver with the DC level of Reserved line, also carries out same SW at receiver side and switches.

Through adopting above structure, be that SCL, SDA, CEC communication can not receive the noise of LAN communication, can guarantee communicating by letter of stable DDC and CEC all the time as the 1st effect.

This is to realize through LAN is physically cut off from those lines in the 1st configuration example, in the 2nd configuration example is in DDC communication, through switch lan signal to be realized from the line cut-out.

As the 2nd effect, because communicating by letter, LAN carries out, so enumerate the situation that to carry out the bigger stable communication of enough and to spare (margin) through line with desirable terminal.

This is because lan signal overlaps onto the line that Reserved, HPD etc. can only transmit the DC level in the 1st configuration example; So can in the abundant wide frequency range that LAN signal post needs, terminal impedance be remained ideal value, in the 2nd configuration example be because when only carrying out LAN communication through switch be connected DDC communicate by letter in the terminating circuit used of unallowed LAN.

A~E of Figure 21 is the figure that is illustrated in the two-way communication waveform in the communication system of this configuration example.

The A of Figure 21 representes from the signal waveform of EH receiver apparatus transmission; The B of Figure 21 representes the signal waveform that the EH receiver apparatus receives; The C of Figure 21 representes the signal waveform through cable, and the D of Figure 21 representes the signal that the EH source device receives, and the E of Figure 21 representes from the signal waveform of EH source device transmission.

That kind shown in figure 21 according to this configuration example, can realize good two-way communication.

(content decoding system)

Then, explain the communication system of having used above explanation, content decoding system implementation mode.

Figure 22 is the figure of structure of the content decoding system of an expression execution mode of the present invention.

Shown in figure 22, the content decoding system of this execution mode is made up of television equipment 1 (below, be called TV1), AV amplifier 2, game station 3 and PC4.

TV1 is connected with AV amplifier 2 through HDMI, and game station 3 is connected with this AV amplifier 2 through HDMI with PC4 equally.In this execution mode, TV1 works as the receiver apparatus in HDMI, and game station 3 works as the source device in HDMI with PC4.In addition, TV1 is connected with server 5 on the network 6 via Ethernet (registered trade mark).

TV1 can be through the user via remote controllers 911 (below, be called remote controller 911) operation.TV1 passes through from remote controller 911 input users' operation, thereby can pass through the broadcast singal receiving broadcast content, the content that perhaps receives on the networks 6 from server 5.

Behind the voice signal of AV amplifier 2 via HDMI 6 interior contents of perhaps among game station 3 or PC4, storing of receiving it is amplified from TV1 receiving broadcast signal or TV1 from the internet, and from be connected to this AV amplifier 2, for example the multichannel circulating loudspeaker (not shown) of 5.1 passages etc. is exported this voice signal.In addition, the vision signal of AV amplifier 2 content that will receive via HDMI from game station 3 or PC4 outputs to TV1 via HDMI.TV1 shows this vision signal through display floater.In addition, AV amplifier 2 receives the vision signal and the voice signal of the content that TV1 receives via HDMI, and then is sent to game station 3 or PC4 via HDMI.Game station 3 or PC4 record this vision signal and voice signal in the recording medium of HDD of having respectively etc.

Server 5 except various video contents or sound-content, the storage the browser various webpages and TV1, game station 3 and the Downloadable software of PC4 etc. that show that are used for having also at TV1, game station 3 and PC4.

Figure 23 is the block diagram of the structure of the above-mentioned TV1 of expression.

Shown in figure 23, TV1 comprises: digital antenna input terminal 912, digital tuner 913, mpeg decoder 914, video processing circuit 915, figure generation unit 916, panel drive circuit 917, display floater 918, audio signal processing circuit 919, sound amplifying circuit 920, loud speaker 921, expansion HDMI terminal 922, expansion HDMI receiving element 923, high speed data lines I/F (interface) 924, CPU (Central Processing Unit) 925, flash memory 926, DRAM (Dynamic RandomAccess Memory) 927, internal bus 928, Ethernet (registered trade mark) I/F929, Ethernet (registered trade mark) terminal 930 and remote controller light receiving unit 931.

912 inputs of digital antenna input terminal are through the broadcast singal of the not shown digital broadcasting that digital antenna received.Digital tuner 913 is selected the signal of specified channel from this broadcast singal, and is baseband signal with its frequency translation, outputs to mpeg decoder 914.The AV baseband signal of 914 pairs of codings of mpeg decoder is decoded, and the vision signal in the signal of decoding is outputed to video processing circuit 915, and voice signal is outputed to audio signal processing circuit 919.

The vision signal of 915 pairs of inputs of video processing circuit is carried out the Video processing of needs, and outputs to figure generation unit 916.Figure generation unit 916 is handled through OSD (On Screen Display) and synthesize the vision signal imported and GUI (Graphical User Interface) picture etc., and outputs to panel drive circuit 917.D/A conversion of the vision signal that panel drive circuit 917 carries out providing from figure generation unit 916 etc., and drive display floater 918 according to the vision signal that is transformed to simulation.Display floater 918 for example is LCD (Liquid Crystal Display) or PDP (Plasma Display Panel) etc., shows from the analog video signal of panel drive circuit 917 inputs.

The voice signal of 919 pairs of inputs of audio signal processing circuit carries out the acoustic processing of needs, and outputs to sound amplifying circuit 920.Sound amplifying circuit 920 is adjusted into the volume that needs with the voice signal of input, and outputs to loud speaker 921 and reproduce.

Expansion HDMI terminal 922 is on HDMI terminal in the past, to have added expansion, makes and can carry out the terminal based on the communication of above-mentioned two-way high speed data lines.This expansion HDMI terminal 922 is connected with AV amplifier 2 via the HDMI cable, imports vision signal or voice signal and other various signals of various contents from game station 3 and PC4 via AV amplifier 2, also these equipment is exported baseband signal.Expansion HDMI receiving element 923 receives from the baseband signal of expansion HDMI terminal 922 inputs, and outputs to video processing circuit 915.The high speed data lines I/F924 signal that input is imported via above-mentioned high speed data lines in through the signal of expansion HDMI terminal 922 inputs, and carry out various signal processing and output to Ethernet (registered trade mark) I/F929.

CPU925 visits DRAM927 etc. as required, and each module of blanket control TV1.Flash memory 926 is non-volatile memories of having stored the firmware that is used to make OS, program or various parameters etc. that CPU925 carries out regularly.DRAM927 be operation as CPU925 with zone etc. and use, temporarily keep the memory of OS or program, deal with data etc.CPU925, flash memory 926 and DRAM927 are connected to internal bus 928, control the integral body of TV1 through mutual visit.In addition, CPU925 is also connected to above-mentioned expansion HDMI receiving element 923, is controlled at the IP communication process in the expansion HDMI receiving element 923.

Ethernet (registered trade mark) I/F929 is connected to Ethernet (registered trade mark) terminal 930, and control is communicated by letter with the IP of server 5 grades on the internet 6.In addition, Ethernet (registered trade mark) I/F929 is also connected to above-mentioned high speed data lines I/F924, will likewise control with the signal of importing from Ethernet (registered trade mark) terminal 930 from the IP signal of this high speed data lines I/F924 input.

Remote controller light receiving unit 931 receives control signals from the remote controller of being operated by the user 911, and this control signal is outputed to CPU925.Like this, carry out the control and treatment of TV1 reception or reproduction etc., corresponding with control signal of content.

Figure 24 is the block diagram of the structure of the above-mentioned PC4 of expression.

That kind shown in figure 24, PC4 comprises: CPU941, flash memory 942, S (Synchronous) DRAM943, GPU 944, display floater 945, sound card 946, loud speaker 947, internal bus 948, exterior I/O (input and output) I/F949, expansion HDMI transmitting element 950, expansion HDMI terminal 951, high speed data lines I/F960, Ethernet (registered trade mark) I/F952, Ethernet (registered trade mark) terminal 953, WLAN I/F954, USBI/F955, USB terminal 956, ATA (AdvancedTechnology Attachment) I/F957, HDD958 and CD drive 959.

CPU941 as required and access sdram 943 etc., each module of blanket control PC4.In addition, CPU941 also serves as the decoding processing of the various contents that are encoded.Flash memory 942 is non-volatile memories of having stored the firmware of the start-up routine that is used to make the OS that CPU925 carries out or various parameters etc. regularly.SDRAM943 be operation as CPU941 with zone etc. and use, temporarily keep the memory of OS or program, deal with data etc.

944 pairs of GPUs in various perhaps the vision signal of GUI picture under the execution of OS and application etc. draw, and output to the display floater 945 that constitutes by LCD etc.Sound card 946 be created on various in the voice signal under the execution of OS and application perhaps, and output to loud speaker 947.

CPU941, flash memory 942, SDRAM943, GPU 944 and sound card 946 are connected to internal bus 948, and then are connected to exterior I/OI/F.

Expansion HDMI terminal 951 is and expansion HDMI terminal 922 identical ground in above-mentioned TV1, on HDMI terminal in the past, added expansion, makes the terminal that can carry out two-way high-speed data communication.Expansion HDMI transmitting element 950 is through this expansion HDMI terminal 951 and be connected with AV amplifier 2 via the HDMI cable, between AV amplifier 2 and TV1 with the vision signal of various contents or voice signal and other various signals as baseband signal and input and output.High speed data lines I/F960 is input to Ethernet (registered trade mark) I/F929 at the signal that from the signal of expansion HDMI terminal 951 outputs, will be used for exporting via above-mentioned high speed data lines, carries out various signal processing and outputs to expansion HDMI terminal 951.

Ethernet (registered trade mark) I/F952 is connected with Ethemet (registered trade mark) terminal 953, be controlled at internet 6 on server 5 between IP communicate by letter, perhaps based on the IP of the HDMI terminal 951 that has used above-mentioned high speed data lines I/F960 communication.

WLAN I/F954 control is based on the communication process of WLAN.USBI/F955 is connected with USB terminal 956, be controlled at and various external equipment between usb communication handle.

ATAI/F957 is connected with CD drive 959 with HDD958, and its various piece with PC4 such as above-mentioned CPU941 is connected with CD drive 959 with HDD958.HDD958 is stored in built-in hard disk with the various programs of OS (OperatingSystem) or application etc., various content and other data etc., and reads this stored data.CD drive 959 can be installed not shown CD, can be identical with above-mentioned HDD958, the various data of record in this CD, and read stored data.In addition, as CD, for example enumerate DVD (DVD-Video, DVD-RAM, DVD-R, DVD-RW, DVD+R, DVD+RW etc.) or BD (Blu-ray Disc), CD (Compact Disc) etc.

In addition, because the structure of game station 3 is also roughly the same with the structure of above-mentioned PC4, so omit explanation.Certainly, game station 3 is included in necessary software and hardware structure in the execution of games application, and is different with PC4 in this.

Figure 25 is the figure of basic electrical structure of expansion HDMI receiving element 923 of expansion HDMI transmitting element 950 and the TV1 of expression PC4.Such as stated; In this execution mode; PC4 works as the receiver apparatus in HDMI as the source device in HDMI, TV1; But be not limited to this mode, also exist in each equipment situation about switching, also exist each equipment to have the both sides' of source device and receiver apparatus the situation of function as the function of source device and receiver apparatus.

Shown in figure 25, the expansion HDMI transmitting element 950 of PC4 comprises transmitter 120, and the expansion HDMI receiving element 923 of TV1 comprises receiver 410.Send vision signal, voice signal and its clock signal from transmitter 120 along a direction, receive those signals through receiver 410.In the transmission of these signals, use TMDS passage 0~2 and TMDS clock passage in the TMDS mode.The maximum transfer speed of this TMDS passage is approximately 5Gbps, but is not limited thereto.

DDC140 uses when the TV1 as receiver apparatus reads E-EDID at the PC4 as source device.E-EDID is, for example RGB or YCbCr4:4:4 or YCbCr4:2:2 etc., profile (profile) information of video/audio format that receiver apparatus can be tackled etc.TV1 as receiver apparatus comprises the EDIDROM (EDID ROM) 160 that stores above-mentioned E-EDID.In addition, though not shown, as the PC4 of source device also can with the identical ground of TV1 as receiver apparatus, store above-mentioned E-EDID, and as required this E-EDID sent to TV1.

CEC line 130 uses when between as the PC4 of source device and the TV1 as receiver apparatus, controlling the two-way communication of data of usefulness.

But, in HDMI terminal in the past, be provided with as being used for the pin that pin that HPD (Hot Plug Detect) line that source device detects the holding wire whether connected receiver apparatus uses and siding are used.For example, in the HDMI of type A, the HPD pin is that number of pins is No. 19 a pin, and subsequent use pin is that number of pins is No. 14 a pin.

In this execution mode, such as stated, this HPD line and siding to be reversed line as differential, and expand, feasible conduct can be carried out working based on the high speed data lines 150 of the two-way IP communication of differential wave.In this execution mode, in this high speed data lines 150, will be called HPD/Ether+ with the corresponding pin of HPD pin in the past, will be called Reserve/Ether-with the corresponding pin of subsequent use pin in the past.

Such as stated, high speed data lines 150 is connected to the high speed data lines I/F (924,960) that is connected with each expansion HDMI terminal (22,51) of TV1 and PC4, and then is connected to Ethernet (registered trade mark) I/F (929,952).Use HDMI to carry out communicating by letter when like this, can keep interchangeability with in the past HDMI based on the two-way High Speed IP of Ethernet (registered trade mark).The maximum transfer speed of this high speed data lines is approximately 100Mbps, but is not limited thereto.

And in this execution mode, the content of using this high speed data lines 150 that TV1 can not be decoded sends to the source device of PC4 etc., and uses above-mentioned TMDS passage to send as baseband signal the content of decodings such as PC4.

In addition, in the example of Figure 25, enumerating PC4 as source device is example, and still, game station 3 also can comprise expansion HDMI terminal and above-mentioned high speed data lines I/F equally certainly, and works as source device.

Then, explain as the action of the content decoding system of above formation.

Figure 26 is the sequential chart of flow process that is illustrated in the processing of the content decoding system in this execution mode.In addition, Figure 27 is the flow chart of expression as the flow process of the action of the TV1 of receiver apparatus in this content decoding system, and Figure 28 is expression as the flow chart of the flow process of the action of the game station 3 of the source device in this content decoding system and PC4.

At first, in TV1, via remote controller 911, for example the passage of digital broadcasting is selected, and perhaps the reproduction of content request on the HDD958 is transfused to etc., thereby from the audiovisual request ((61) of Figure 26, the step 81 of Figure 27) of user input content.So the CPU925 of TV1 judges whether this content is the content ((62) of Figure 26, the step 82 of Figure 27) that TV1 can decode.CPU925 is being judged as (step 82 " denying ") under the situation about can not decode; Through high speed data lines I/F24; Use the high speed data lines 150 of expansion HDMI terminal 922, game station 3 and PC4 are sent be used to inquire about the query statement ((63) of Figure 26, the step 83 of Figure 27) of this content of to decode.

Figure 29 is the figure that has represented the example of this query contents.

Shown in figure 29, this query statement is as the attribute of the content of request decoding, recorded and narrated the data format, stream format, coded format, resolution, bit rate, sample frequency, sampling bits number of video, sound, text etc. etc.Figure 29 (a) be the request video content decoding the time the instruction example, Figure 29 (b) be the request sound-content decoding the time the instruction example.In Figure 29 (a), become query object with the decoding of the video content of MPEG4-AVC format encoded, in Figure 29 (b), become query object with the decoding of the sound-content of MP3 format coding.In addition, this query statement is to record and narrate with XML (ExtensibleMarkup Language) form, but is not limited thereto.

In game station 3 and PC4, receive above-mentioned query statement (step 101 of Figure 28) with high speed data lines I/F960 via expansion HDMI terminal 951.Then, can the CPU941 of game station 3 and PC4 judge the content (step 102 of Figure 28) of the query object of self decoding.

Be judged as (step 102 " being ") under the situation about can decode, CPU941 sends the response instruction ((66) of Figure 26, Figure 28 106) of the intention that response can decode via the 150 couples of TV1 of above-mentioned high speed data lines.At this moment, CPU941 calculates the decoding estimated processing time (time of delay) in this content, in this response instruction, also comprises this processing time to respond.

Be judged as (step 102 " denying ") under the situation about can not decode; CPU941 is via Ethernet (registered trade mark) I/F52, the 5 inquiries renewal ((64) of Figure 26, the step 103 of Figure 28) of software of this content that whether can be used to decode to the server on the internet 6.CPU941 receives the response from server 5 (Figure 26 (65)) for this inquiry, and based on this response results, judges whether to carry out the download (perhaps upgrading) (step 104 of Figure 28) of above-mentioned software.Be judged as (step 104 " being ") under the situation about can download; CPU941 downloads more new model (step 105 of Figure 28) of this software or this, and sends ((66) of Figure 26, the step 106 of Figure 28) through can the decode response instruction of intention of foregoing of this download via above-mentioned high speed data lines 150.In addition, through above-mentioned response results, be judged as (step 104 " denying ") under the situation about can not download, the response instruction of the intention that CPU941 can not decode sends ((66) of Figure 26, the step 110 of Figure 28) via above-mentioned high speed data lines 150.

Figure 30 is the figure that has represented the example of above-mentioned response instruction.

Can Figure 30 (a) be the response instruction of expression situation about can decode, the time of delay (10ms) of having recorded and narrated the intention that can decode (" being ") as the judged result that decode and under the situation of decoding, having estimated.Can Figure 30 (b) be the response instruction of expression situation about can not decode, recorded and narrated the intention that can not decode (" denying ") as the judged result that decode.

Turn back to Figure 27, do not receive from any equipment at the CPU925 of TV1 under the situation of the response instruction of having recorded and narrated the intention that can decode (step 84 " denying "), can TV1 judges carry out the download (step 91 of (64) of Figure 26 and (65), Figure 27) of software.Be judged as under the situation about self can not download, CPU925 sends with PC4 via 150 pairs of game stations of above-mentioned high speed data lines 3 and is used to ask the instruction ((68) of Figure 26, the step 92 of Figure 27) that can 5 inquiries download to server apparatus.

The CPU941 of game station 3 and PC4 is according to the request from above-mentioned TV1; Can 5 inquiries download ((64) of Figure 26, the step 103 of Figure 28) to server apparatus; According to the response results from server 5, the response instruction that can response be decoded sends to TV1 ((66) of Figure 26, step 106 and the step 110 of Figure 28) via high speed data lines 150.

Figure 31 be represented can downloaded software to server 5 inquiry instruction and for the figure from the example of the response instruction of server 5 of this query statement.Can Figure 31 (a) be the example of the query statement that download, and can Figure 31 (b) be the example of the response instruction that download.

Such shown in Figure 31 (a), in the download and inquiry instruction, recorded and narrated the codec format (for example, MP3 decoder) of the content of decoder object.Such shown in Figure 31 (b), in downloading response instruction, recorded and narrated having or not and the address (URL) of this software of the software corresponding with the codec format of query object.The download of this software in each equipment is to carry out from this URL.

Turn back to Figure 27; The CPU925 of TV1 is (step 84 " being ") under the situation that receives the response instruction of having recorded and narrated the intention that can decode and receive under the situation of response of the intention that can decode through the download of software (step 93 " being "); Based on this response instruction, confirm the shortest equipment ((69) of Figure 26, the step 85 of Figure 27) of processing time that decoding is required.Then, CPU925 transmits the content and this decoding request instruction ((70) of Figure 26, the step 86 of Figure 27) of above-mentioned HDMI transmitting element decoder object through above-mentioned high speed data lines I/F24 via the 150 pairs of equipment that should confirm of high speed data lines.

The CPU941 of game station 3 and PC4 judges whether and begins to transmit content (step 107 of Figure 28) via the decoding request of high speed data lines 150 transmission contents the time from TV1; Under the situation of the transmission that begins content (" being "); Send i.e. perhaps " Active Source " instruction of " Image View On ", " Text ViewOn " of the inputting switching command that transfer instruction determined as this CEC line 130 via 130 couples of TV1 of above-mentioned CEC line, request switches to the input ((72) of Figure 26, the step 108 of Figure 28) from expansion HDMI terminal 22 with the display floater 18 of TV1 and the input of loud speaker 21.In addition, should " Image View On " instruction wait situation about being not limited to, for example also can send via high speed data lines 150 through 130 transmissions of CEC line.The decoding (step 109 of Figure 26) of CPU941 and the content that should " Image View On " begins to receive the transmission of instruction etc. the time.Then, the content that will decode of CPU941 sends to TV1 ((74) of Figure 26, the step 109 of Figure 28) via above-mentioned TMDS passage as baseband signal through expansion HDMI transmitting element 950.

The CPU941 of TV1 based on above-mentioned " Image View On " instruction etc.; Carry out ((73) of Figure 26, the step 88 of Figure 27) switched in the input of expansion HDMI terminal 922, and the content (step 90 of Figure 27) from display floater 918 reproduces the decoding that receives via the TMDS passage with loud speaker 921 after.

In addition; CPU925 can download under the situation of above-mentioned software (step 91 of Figure 27 " being ") being judged as TV1; Download (step 92) to server 5 these softwares of request; And judge in above-mentioned URL, whether there is project software (step 96), and be judged as (" being ") under the situation that has software, download this software (step 97) from above-mentioned URL.Then, CPU925 passes through this software decode content (step 98), and reproduces these contents (step 90) from display floater 918 and loud speaker 921.

In addition; CPU925 is judged as (" denying ") under the situation that in URL, does not have software and in above-mentioned steps 93, does not receive through the download of software under the situation of response of intention that can decode content (" denying ") from any equipment in above-mentioned steps 96, so in display floater 918, show because the irreproducible intention of content (step 94) of audiovisual request object that can not decode users.

In addition, CPU925 in above-mentioned steps 82, be judged as in TV1 can the situation of decode content under (" being "), this content (step 98) of decoding, and reproduce (step 90).

Through above action,, thereby can reproduce all contents and irrelevant with coded format even the content that exists TV1 not decode receives after also can making game station 3 or PC4 etc. have this content of other device decodes of decoding capability.In addition; In the transmission to the exchange of the query statement of the decoding request instruction of other equipment etc. or content, use can be carried out the high speed data lines 150 of bidirectional high speed communication, in the transmission based on baseband signal of the content after decoding; Use can be carried out the above-mentioned TMDS passage of the transmission of Large Volume Data; Thereby can carry out the decoding of content efficiently and reproduce till processing, therefore, can reproduce content immediately and can not bring the stand-by period user's audiovisual request.

Only for scheduling above-mentioned execution mode, it is not natural in the scope that does not break away from intention of the present invention, can carrying out various changes in the present invention.

In above-mentioned execution mode; The 1st transmission path as the exchange that is used for the various instructions relevant with the request of interior perhaps content decoding; The high speed data lines 150 (Ethernet (registered trade mark)) of use in above-mentioned expansion HDMI, in addition, as the 2nd transmission path of the transmission of the content after being used to decode; The TMDS passage of use in expansion HDMI, but the 1st and the 2nd transmission path is not limited thereto.

As the 1st transmission path; In addition; For example can use USB (Universal Serial Bus) or IEEE1394 etc.; As the 2nd transmission path, in addition, for example can use DVI (DigitalVisual Interface), Display Port, UDI (Unified Display Interface) etc.

In above-mentioned execution mode,, the situation of the decoding of broadcasted content that request TV1 receives or the content of in game station 3 or PC4, storing has been described, but the content of decoder object is not limited to such content as the content of decoder object.

For example, consider that also the web browser that has at TV1 does not have under the situation of corresponding Flash (registered trade mark), TV1 is transferred to PC4 with this webpage via high speed data lines 150, and PC4 uses the situation of TMDS channel transfer to TV1 with this webpage decoding back.

In addition; Also consider for example TV1 do not have reply for example through the reply multichannel around the situation of decoding of the new sound-content acoustic coding format encoded, that in broadcasted content or web page contents, comprise such as acoustic coding form under; This sound-content is transferred to game station 3 or PC4 via high speed data lines 150; Game station 3 or PC4 download the softwares corresponding with the decoding of this sound-content and decode through this software from server 5, and use the TMDS channel transfer to arrive AV amplifier 2 and situation about exporting.

In above-mentioned execution mode, the expansion HDMI terminal 922 of TV1 and the expansion HDMI terminal 951 of PC4 are wired connections through the HDMI cable, but also can connect both through radio HDMI.

In above-mentioned execution mode; TV1, AV amplifier 2, game station 3 and PC4 ways of connecting have been represented; But be not limited thereto, carry out the decoding of content thereby also can for example connect HDD register or DVD/BD player and other all electronic equipments such as AV equipment through HDMI.

Claims (5)

1. an electronic installation is connected with other electronic equipments, it is characterized in that, comprising:
The 1st communication component sends with the coded format content encoded that can not decode at this electronic installation and the decoding request signal of asking this content of decoding via transmission path;
The 2nd communication component, will said other electronic equipments based on the described request signal and decoded said content as baseband signal, receive via said transmission path;
Reproduction block is reproduced the content of said reception; And
The notice parts; Communicate via the pair of differential transmission path that in said transmission path, comprises and said other electronic equipments; And, said other electronic equipments are notified the connection status of this electronic installation through at least one the direct current biasing current potential in the said pair of differential transmission path.
2. electronic installation as claimed in claim 1 is characterized in that,
Said the 1st communication component sends said decoding request signal and content via having the 1st transmission path the 1st transmission speed, that in said transmission path, comprise,
Said the 2nd communication component receives said decoded content via having the 2nd transmission path the 2nd transmission speed faster than said the 1st transmission speed, that in said transmission path, comprise.
3. electronic installation as claimed in claim 1 is characterized in that,
Said other electronic equipments exist a plurality of,
Said the 1st communication component comprises:
Said a plurality of other electronic equipments are sent the parts of the request signal in required processing time of the decoding that is used to inquire about said content encoded respectively;
Receive the parts that respond the response signal in said processing time according to said request signal respectively from said a plurality of other electronic equipments; And
Based on the said response signal that respectively makes, to sending the parts of said decoding request signal at decode other electronic equipments of said content encoded of the shortest said processing time.
4. electronic installation as claimed in claim 1 is characterized in that,
Said other electronic equipments are connected with the server unit of the software of having stored the said content encoded that is used to decode,
Said the 1st communication component comprises:
Said other electronic equipments are sent be used to inquire about the parts of request signal of said content encoded of to decode;
Receive the parts of the said response signal that can decode of response from said other electronic equipments; And
Under the situation that receives the said said response signal that can not decode of response; Said other electronic equipments are sent the parts that receive request signal and said decoding request signal; Said reception request signal is used to ask the reception from the said software of said server unit, and said decoding request signal is used to have asked to use the said decoding of the software of this reception.
5. content reproducing method, be with electronic installation that other electronic equipments are connected in content reproducing method, it is characterized in that,
Send said content of encoding and the decoding request signal of asking this content of decoding with the coded format that can not decode at this electronic installation via transmission path,
Will said other electronic equipments based on the described request signal and decoded said content as baseband signal, receive via said transmission path,
Content to said reception is reproduced,
Communicate via the pair of differential transmission path that in said transmission path, comprises and said other electronic equipments; And, said other electronic equipments are notified the connection status of this electronic installation through at least one the direct current biasing current potential in the said pair of differential transmission path.
CN2007800414965A 2006-11-07 2007-11-07 Electronic device, content reproducing method, and content decoding method CN101536519B (en)

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