CN101072338A - Inter-chip data and message same frame transmission system and method - Google Patents
Inter-chip data and message same frame transmission system and method Download PDFInfo
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- CN101072338A CN101072338A CNA2007101114584A CN200710111458A CN101072338A CN 101072338 A CN101072338 A CN 101072338A CN A2007101114584 A CNA2007101114584 A CN A2007101114584A CN 200710111458 A CN200710111458 A CN 200710111458A CN 101072338 A CN101072338 A CN 101072338A
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Abstract
The system includes following modules: being located on the chip for sending data between chips, the sending module as front-end data processing module of video output port of the sending chip is in use for generating transmission frame of carrying data between chips and transmission message in same frame and sent out through the video output port; being located on the chip for receiving data between chips, the receiving module as back-end data processing module of video input port of the receiving chip is in use for parsing transmission frame received through the video input port. The invention also discloses method for transferring data between chips and transmission message in same frame based on video port of chip. The invention lightens transmission load of system bus without influence on operation of peripheral equipment on bus so as to reduce cost of hardware and complexity of software, and make post-treatment for data received by the reception chip more accuracy and in time.
Description
Technical field
The present invention relates to the embedded multimedia system of multicore sheet scheme, and particularly, relate to a kind of chip chamber data and message same frame transmission system and method based on the chip video mouth.
Background technology
Usually, in an Embedded multimedia system, often need handle simultaneously a plurality of video images.But,,, and need realize by the collaborative work of multi-plate chip so often can not finish in single chips because the systemic-function more complicated, image data amount is very big and real-time requires very strictly again.
In the multimedia system of a multicore sheet scheme, carry out at each chip chamber that the transfer of data right and wrong of image usually see.There is following problem usually in current employed multimedia system:
(1) when chip chamber real-time Transmission size is equal to the data flow of view data, generally realizes by bus transfer or shared drive.Wherein, can take a large amount of bus bandwidths by the bus transfer image, and bus resource is of great rarity in multichip system, in addition, this also can have influence on other operations of using the module of bus; The data sharing of carrying out many chip chambers by shared drive then needs software that the read-write administrative mechanism of one cover shared drive is provided, and can increase the complexity of software like this, and because transmitting terminal and receiving terminal are coupled, can improve the cost of system;
(2) in Embedded video communications system, collection of video signal and the demonstration link that is absolutely necessary is so the present chip factory chamber of commerce is being used for increasing a plurality of video port peripheral hardwares on the media processing chip of multimedia system; Simultaneously, because the major part work of video port peripheral hardware all is to finish by hardware, speed is fast, and is therefore very little to the consumption of CPU;
(3) the video port peripheral hardware of chip is to be used for receiving the collection input of CODEC and to send demonstration output to CODEC originally, so only support that generally (the brightness Y sample rate of horizontal direction and the sample rate of chrominance C b or Cr are 2:1 to the 4:2:2 sample format, the brightness Y sample rate of vertical direction and the sample rate of chrominance C b or Cr are 1:1) image, and between actual sheet image transmitted because be the coding front end or the decoding rear end image, it mostly is the 4:2:0 sampling greatly, and (the brightness Y sample rate of horizontal direction and the sample rate of chrominance C b or Cr are 2:1, the brightness Y sample rate of vertical direction and the sample rate of chrominance C b or Cr also are 2:1), so can not directly use on the video port peripheral hardware; If transmitting terminal is that the image transitions of 4:2:0 becomes the output of 4:2:2 format-pattern with form, receiving terminal becomes the 4:2:0 form to the 4:2:2 format conversion more then, can cause meaningless waste disposal ability so undoubtedly;
When (4) chip chamber image transmitted characteristic changes, system needs simultaneously change notification to be given the reception process chip of this image, and the very big message of this and picture frame relevance (for example, image control command, frame delineation information, state change information or sign etc. below will abbreviate message as) with the corresponding relation of picture frame be very important; Yet General System can use message channel and data channel to transmit respectively the transmission and the image data transmission of message, and this mutual incoherent transmission mechanism makes receiving terminal be difficult to realize message and data synchronization.
Therefore, the problem that in currently used technology, exists system complexity and cost height inevitably, needs the sacrificial system disposal ability to carry out image processing and be difficult to realize message and data synchronization at receiving terminal.Yet, effective solution is not proposed at present as yet.
Summary of the invention
Consider the problems referred to above and make the present invention.For this reason, the present invention aims to provide a kind of chip chamber data and message same frame transmission plan based on the chip video mouth, and it can make full use of the transmission at same frame that the vacant video port of embedded multimedia system chips is finished chip chamber data and related news.
According to embodiments of the invention, provide a kind of chip chamber data and message same frame transmission system based on the chip video mouth.
This system comprises: sending module, being positioned at needs to send on the transmission chip of chip chamber data, as the front end data processing module of the video output that sends chip, be used to produce the transmission frame that carries chip chamber data and message transfer at same frame that sends by video output; And receiver module, be positioned on the receiving chip that needs data between receiving chip, be used as the Back end data processing module of the video input port of receiving chip, be used to resolve the transmission frame that receives by the video input port.
Wherein, sending module with the chip chamber deposit data in transmission frame to be exported, message transfer at same frame is packaged into the message bag with predetermined format, is placed in the idle bandwidth after the chip chamber data, and send the transmission frame of depositing chip chamber data and message bag by video output.
In addition, receiver module extracts the chip chamber data from transmission frame, extracts the message bag from idle bandwidth, and resolves the message bag with predetermined format.
According to another embodiment of the present invention, provide a kind of chip chamber data and message same frame transmission method based on the chip video mouth.
This method comprises: step S202, send chip with chip chamber deposit data waiting for transmission in transmission frame; Step S204 sends chip and will be packaged into the message bag with predetermined format with the message of chip chamber data transmission at same frame, and deposit the message bag in the idle bandwidth of transmission frame; Step S206; The transmission chip will carry the transmission frame of chip chamber data and message bag and export from video output; Step S208, receiving chip receive transmission frame from the video input port, extract the chip chamber data from transmission frame, and extract the message bag from idle bandwidth.
Wherein, the chip chamber data are that form is the vedio data of 4:2:0; The form of transmission frame is 4:2:2.And, in step S202, Cb data in the vedio data and Cr data are stored in transmission frame continuously.In step S204, idle bandwidth is not deposit the chip chamber section data in the transmission frame.Wherein, in transmission frame, deposited the Cr data after, reserve delegation as isolation strip, be used for data and message bag between isolating chip.
And, in isolation strip, fill self-defining filling word.In step S204, begin to deposit the message bag from the back delegation of isolation strip.
In addition, in step S208, receiving chip is further resolved the message bag with predetermined format.In addition, the original position and the total length of above-mentioned message bag are pressed row alignment.
By technique scheme of the present invention, can be under the situation that does not influence the work of other peripheral hardwares on the bus bus transfer load of mitigation system, reduced the complexity of the cost and the software of hardware, and made receiving chip more accurately and in time the post-processed of the data that transmit.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 be system according to the invention embodiment based on the chip chamber data of chip video mouth and the block diagram of message same frame transmission system;
Fig. 2 be according to the inventive method embodiment based on the chip chamber data of chip video mouth and the flow chart of message same frame transmission method;
Fig. 3 is the structural representation based on message bag in the chip chamber data of chip video mouth and the message same frame transmission method according to the inventive method embodiment; And
Fig. 4 be according to the inventive method embodiment based in the transmission frame of 4:2:2 form, depositing the 4:2:0 image in the chip chamber data of chip video mouth and the message same frame transmission method and with the schematic diagram of frame message bag.
Embodiment
Describe embodiments of the invention in detail hereinafter with reference to accompanying drawing, need to prove, provide following examples with provide to of the present invention comprehensively and thorough, rather than the present invention carried out any restriction.
System embodiment
In the present embodiment, provide a kind of chip chamber data and message same frame transmission system based on the chip video mouth.
As shown in Figure 1, chip chamber data and message same frame transmission system 100 based on the chip video mouth according to present embodiment comprise: sending module 102, being positioned at needs to send on the transmission chip of chip chamber data (can be considered the data payload part of transmission frame), as the front end data processing module of the video output that sends chip, be used to produce the transmission frame that carries chip chamber data and message transfer at same frame that sends by video output; And receiver module 104, be positioned on the receiving chip that needs data between receiving chip, be used as the Back end data processing module of the video input port of receiving chip, be used to resolve the transmission frame that receives by the video input port.
Wherein, sending module 102 with the chip chamber deposit data in transmission frame to be exported, message transfer at same frame is packaged into message bag (can be considered the message loading section of transmission frame) with predetermined format, be placed in the idle bandwidth after the chip chamber data, and send the transmission frame of depositing chip chamber data and message bag by video output.
In addition, receiver module 104 extracts chip chamber data (that is, data payload) from the front portion of transmission frame, extracts the message bag from idle bandwidth (rear portion of transmission frame), and resolves the message bag with above-mentioned predetermined format.
Wherein, the detailed structure of message bag has been shown among Fig. 3, will be described hereinafter this.
Method embodiment
In the present embodiment, provide a kind of chip chamber data and message same frame transmission method based on the chip video mouth.
As shown in Figure 2, this method comprises: step S202, send chip with chip chamber deposit data waiting for transmission in transmission frame; Step S204 sends chip and will be packaged into message bag (that is, the message loading section) with predetermined format with the message of chip chamber data transmission at same frame, and deposit the message bag in the idle bandwidth of transmission frame; Step S206; The transmission chip will carry the transmission frame of chip chamber data and message bag and export from video output; Step S208, receiving chip receive transmission frame from the video input port, extract the chip chamber data from transmission frame, and extract the message bag from idle bandwidth, and in addition, receiving chip can further be resolved the message bag with predetermined format.
Wherein, above-mentioned chip chamber data are that form is the vedio data of 4:2:0; The form of transmission frame is 4:2:2.And, in step S202, as shown in Figure 4, the Cb in the vedio data (blue poor) data and Cr (redness is poor) data are stored in frame of video (that is, above-mentioned transmission frame) continuously.In step S204, idle bandwidth be frame of video in do not deposit the chip chamber section data, that is, and back half (for example, 4004 among Fig. 4) of chrominance space.Wherein, in frame of video, deposited the Cr data after, reserve delegation as isolation strip (for example, 4005 among Fig. 4), be used for data and message bag between isolating chip, like this, in step S204, begin to deposit the message bag from the back delegation of isolation strip.
Fig. 3 shows the form of message bag, and the packing of message/parsing form (that is, above-mentioned predetermined format) is the proprietary protocol that each receipts/chip is all observed, and this agreement leaves vacant the latter half of chrominance space in.
In the message bag, to handle for convenience, the original position and the total length of message bag are pressed row alignment; Whole message bag is divided into header section 3001 and message load patch 3003:
Header section can be divided into the number and the classes of messages concordance list 3002 of banner word, total length, classes of messages; Wherein, total length is the length that comprises all message bags of banner word, and this length is the integral multiple of line length; Classes of messages concordance list 3002 is made up of a plurality of info class index entries, and the classes of messages number has been represented the number of the classes of messages index entry that comprised in the classes of messages concordance list of back, that is, and and the number of classes of messages load in the message load patch; Each index entry of classes of messages concordance list 3002 has been deposited the characterising parameter of each classes of messages load in the message load patch, comprises the physical length of type of message ID, this classes of messages load of this classes of messages load and position that this classes of messages loads on the message load patch (this positional value is initial to be that original position with the message load patch is a row offset value of basic point).
What deposit in the message loading section (loading section of message bag) is exactly the various types of messages data.Wherein, the original position and the total length of message bag are pressed row alignment, that is to say, the original position of every class message data and length are all pressed row alignment, when so if the effective length of message is not the integral multiple of line length, then in last column of valid data, fill word, finish until this row.
So not only deal with more conveniently, and reserved the isolation strip between the various types of messages data, in the isolation strip, be filled with the filling word.Classes of messages can comprise following several, also allows according to different operating position expansions: for example, and order, state description, voice data and frame delineation or sign.
The application example of this method in video conference terminal will be described below.
In this example, send chip the image (that is, the chip chamber data of above mentioning) of decoded 4:2:0 is sent to receiving chip, receiving chip will handle that (this processing comprises: for example to it, the stack interface, superpose etc. with other videos), coding sends then.
As previously mentioned, source images before the coding in the chip and decoded purpose image all are the sample format of 4:2:0 generally, but chip and outside collecting device are (for example, digital camera, A/D etc.) and the video of external display device (as: digital display, D/A etc.) communication be generally the form of 4:2:2.So in TV conference system, can be following two steps with the flow process simple abstract:
(1) will convert the image of 4:2:0 from the image that external video input source (first-class as A/D, digital camera) gathers the 4:2:2 that comes in earlier to, the coding pre-treatment of carrying out internal system then (for example, the stack captions of making a start, synthetic etc. with other videos), coding sends far-end at last;
(2) video that sends over for far-end, decoding earlier shows pre-treatment (for example, stack receiving end captions, synthetic etc. with interface or local image) then, converts processed video to 4:2:2 by 4:2:0 again, output at last shows.
Can find from this basic procedure, in system, except during gathering and the video sampling form during showing be the 4:2:2, the video sampling form in other most of processing procedures all be 4:2:0, so generally also be 4:2:0 at the sample format of the video of chip chamber transmission.And be used to gather and the video port that shows general what support is the 4:2:2 form, if carry out the transmission of video image between sheet (4:2:0) with it, the sample format of the video that passes and the inconsistent situation of video sampling form that transmission channel (video port) is supported will appear, but owing between the sheet of internal system, transmit data, rather than send the data to external display device (as D/A, digital video display unit etc.), so as long as receive to send form just can transmit 4:2:0 in the frame of video of 4:2:2 form the video of depositing that 2 one of chip chambers regulations observe jointly, in addition, also can have more 1/4 idle bandwidth comes out, therefore, not only can utilize video port to finish the transmission of data between sheet, can also realize the purpose of message and audio video synchronization by utilizing idle bandwidth message transfer at same frame.
At first, the video output terminals that sends chip is carried out following the processing:
(1) with reference to Fig. 4, the form that will transmit is in the frame of video of the video image (4001 among Fig. 4) of the 4:2:0 form that is stored in 4:2:2, in order to guarantee the continuity of idle bandwidth (4004 among Fig. 4), so Cb and Cr in the 4:2:0 form are left in the frame of video of 4:2:2 form continuously; (corresponding to step S202)
(2) data of 4:2:0 are stored in the frame of video of 4:2:2 form continuously after, wherein chrominance space back half (4004 among Fig. 4) can be vacant comes out, and do not deposit real data, this section is exactly the idle bandwidth in this frame data transmission;
(3) will break into the message bag (4002 among Fig. 4) of certain form with the message of this two field picture synchronous transmission;
(4) behind the chroma data Cr of the video image of the 4:2:0 that deposits, reserve delegation, be used to separate the video image and the message bag of the 4:2:0 form of transmission, and in isolation strip, fill self-defining filling word as isolation strip (4005 among Fig. 4);
(5) begin to deposit the message bag in the back of isolation strip delegation; (step (2) to step (5) corresponding to step S204)
(6) will export the video frame image (4003 among Fig. 1) that this comprises the 4:2:2 form of view data and message (that is, mentioned above same frame message) from video port.(corresponding to step S206)
Then, below carrying out, handles the video inputs of receiving chip:
(7) receive the image (view data+message) of 4:2:2 from the video input port;
(8) extract the video data of 4:2:0 in the form of 4:2:2;
(9) from idle bandwidth, extract the message bag that synchronous transmission is come;
(10) format specification by the message bag parses the message that synchronous transmission is come.(step (7) to step (10) corresponding to step S208)
In sum, the present invention has realized the transmission at same frame of data and message at each chip chamber of embedded multimedia system by the powerful data transmission capabilities that utilizes vacant video port.By means of technical scheme of the present invention, can not take bus bandwidth, do not influence simultaneously the bus transfer load of mitigation system under the situation of the work of other peripheral hardwares on the bus; Need not finish the transmission of the big data quantity between the multicore sheet by shared drive, so reduced the complexity of the cost and the software of hardware; And provide bigger idle bandwidth (idle bandwidth: image institute dedicated bandwidth=1: 3), therefore, the transmission at same frame of data and message (as order, voice data, state change information, frame delineation information and frame identification etc.) makes that data and message that receiving chip receives are synchronous, thereby makes receiving chip to the post-processed of the data that transmit more accurately and in time; In addition, synchronous because receiving chip need not carry out again the data that transmit and message, so further simplified the complexity of software.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. chip chamber data and message same frame transmission system based on a chip video mouth is characterized in that, comprising:
Sending module, being positioned at needs to send on the transmission chip of chip chamber data, be used as the front end data processing module of the video output of described transmission chip, be used to produce the transmission frame that carries chip chamber data and message transfer at same frame that sends by described video output; And
Receiver module, being positioned at needs to receive on the receiving chip of described chip chamber data, is used as the Back end data processing module of the video input port of described receiving chip, is used to resolve the described transmission frame that receives by described video input port.
2. chip chamber data according to claim 1 and message same frame transmission system, it is characterized in that, described sending module with described chip chamber deposit data in transmission frame to be exported, described message transfer at same frame is packaged into the message bag with predetermined format, be placed in the idle bandwidth after the described chip chamber data, and send the transmission frame of depositing described chip chamber data and described message bag by described video output.
3. chip chamber data according to claim 1 and message same frame transmission system, it is characterized in that, described receiver module extracts described chip chamber data from described transmission frame, extract described message bag from described idle bandwidth, and resolves described message bag with described predetermined format.
4. chip chamber data and message same frame transmission method based on a chip video mouth is characterized in that, comprising:
Step S202, send chip with chip chamber deposit data waiting for transmission in transmission frame;
Step S204, described transmission chip will be packaged into the message bag with predetermined format with the message of described chip chamber data transmission at same frame, and deposit described message bag in the idle bandwidth of described transmission frame;
Step S206; Described transmission chip will carry the described transmission frame of described chip chamber data and described message bag and export from video output;
Step S208, receiving chip receives described transmission frame from the video input port, extracts described chip chamber data from described transmission frame, and extracts described message bag from described idle bandwidth.
5. chip chamber data according to claim 4 and message same frame transmission method is characterized in that, described chip chamber data are that form is the vedio data of 4:2:0; The form of described transmission frame is 4:2:2.
6. chip chamber data according to claim 5 and message same frame transmission method is characterized in that, in described step S202, Cb data in the described vedio data and Cr data are stored in described transmission frame continuously.
7. chip chamber data according to claim 6 and message same frame transmission method is characterized in that, in described step S204, described idle bandwidth is not deposit described chip chamber section data in the described transmission frame.
8. chip chamber data according to claim 7 and message same frame transmission method is characterized in that, in described transmission frame, deposited described Cr data after, reserve delegation as isolation strip, be used to isolate described chip chamber data and described message bag.
9. chip chamber data according to claim 8 and message same frame transmission method is characterized in that, fill self-defining filling word in described isolation strip.
10. chip chamber data according to claim 8 and message same frame transmission method is characterized in that, in described step S204, begin to deposit described message bag from the back delegation of described isolation strip.
11. chip chamber data according to claim 4 and message same frame transmission method is characterized in that, in described step S208, described receiving chip is further resolved described message bag with described predetermined format.
12. chip chamber data according to claim 4 and message same frame transmission method is characterized in that, the original position and the total length of described message bag are pressed row alignment.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101114584A CN100571385C (en) | 2007-06-20 | 2007-06-20 | Chip chamber data and message same frame transmission system and method based on the chip video mouth |
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| CNB2007101114584A CN100571385C (en) | 2007-06-20 | 2007-06-20 | Chip chamber data and message same frame transmission system and method based on the chip video mouth |
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| CN100571385C CN100571385C (en) | 2009-12-16 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101686399B (en) * | 2008-09-28 | 2012-09-05 | 中兴通讯股份有限公司 | Device and method for transmitting video stream between chips of video conferphone system |
| CN104601923A (en) * | 2014-11-25 | 2015-05-06 | 四川慧盈科技有限责任公司 | High-definition digital signal data processing chip and method |
| CN115314159A (en) * | 2022-08-02 | 2022-11-08 | 成都爱旗科技有限公司 | Inter-chip data transmission method and device |
-
2007
- 2007-06-20 CN CNB2007101114584A patent/CN100571385C/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101686399B (en) * | 2008-09-28 | 2012-09-05 | 中兴通讯股份有限公司 | Device and method for transmitting video stream between chips of video conferphone system |
| CN104601923A (en) * | 2014-11-25 | 2015-05-06 | 四川慧盈科技有限责任公司 | High-definition digital signal data processing chip and method |
| CN115314159A (en) * | 2022-08-02 | 2022-11-08 | 成都爱旗科技有限公司 | Inter-chip data transmission method and device |
| CN115314159B (en) * | 2022-08-02 | 2023-08-04 | 成都爱旗科技有限公司 | Method and device for transmitting data between chips |
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| CN100571385C (en) | 2009-12-16 |
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