CN104486625B - A kind of method for video coding for SVAC standard - Google Patents
A kind of method for video coding for SVAC standard Download PDFInfo
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- CN104486625B CN104486625B CN201410841060.6A CN201410841060A CN104486625B CN 104486625 B CN104486625 B CN 104486625B CN 201410841060 A CN201410841060 A CN 201410841060A CN 104486625 B CN104486625 B CN 104486625B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 241001269238 Data Species 0.000 claims abstract description 4
- 230000008707 rearrangement Effects 0.000 claims description 22
- 239000000284 extract Substances 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 108091026890 Coding region Proteins 0.000 claims description 2
- 239000003550 marker Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000012857 repacking Methods 0.000 description 1
Abstract
The embodiment of the invention provides a kind of method for video coding for SVAC standard, solve the problems, such as that each ROI region of encoding code stream in the prior art and the respective code stream of background area are discontinuous.The method for video coding for being used for SVAC standard includes: the interested pixel and background pixel in identification image to be encoded；Entropy coding is carried out to different interested pixel and background pixel respectively in sequence, generates different bit stream data interested and background bit stream data respectively；Wherein, the corresponding area-of-interest of each bit stream data interested；Increase different bit stream datas interested the label of area-of-interest；Increase background bit stream data is that background area marks；It is marked according to the number of the area-of-interest and background area, resets the code stream to be processed, generate code stream after resetting.
Description
Technical field
The present invention relates to field of video encoding, in particular to a kind of method for video coding for SVAC standard.
Technical background
(Surveillance video and audio coding, safety precaution monitor digital video-audio to current SVAC
Encoding and decoding) in standard, the coding to a frame image is carried out line by line according to pixel.Due to may be simultaneously present in a frame image
Multiple ROI regions (Region Of Interest, area-of-interest) and a background area, therefore in the coding of a frame image
In code stream, background area and the respective code stream of each ROI region are discontinuous.It thus needs each ROI region
Each section code stream is grouped together in order, and entire encoding code stream is reset according to the number order of ROI region, with side
Continue after an action of the bowels and the video intelligent of ROI region is analyzed respectively.However it is not provided with resets encoding code stream in the prior art
Technical solution.
Summary of the invention
In view of this, being solved existing the embodiment of the invention provides a kind of method for video coding for SVAC standard
The discontinuous problem of respective code stream of each ROI region and background area of encoding code stream in technology.
A kind of method for video coding for SVAC standard provided in an embodiment of the present invention includes:
Identify the interested pixel and background pixel in image to be encoded；
Entropy coding is carried out to different interested pixel and background pixel respectively in sequence, it is emerging to generate different senses respectively
Interesting bit stream data and background bit stream data；Wherein, the corresponding area-of-interest of each bit stream data interested；
Increase different bit stream datas interested the label of area-of-interest；Increase background bit stream data is background area
Field mark；
It is marked according to the number of the area-of-interest and background area, resets the code stream to be processed, generated after resetting
Code stream.
A kind of method for video coding for SVAC standard provided in an embodiment of the present invention, by will be interested in code stream
Region and background area are marked so that in code stream and all data packets of each region of interest can be extracted together simultaneously
Combination；The marker number order rearrangement that entire code stream is pressed to region of interest again, so that the complete code stream of each area-of-interest
It can be positioned quickly in video analysis.
Detailed description of the invention
Fig. 1 is a kind of process signal of the method for video coding for SVAC standard provided by one embodiment of the invention
Figure.
Fig. 2 show the schematic diagram of internal structure of a data packet of encoding code stream provided by one embodiment of the invention.
Fig. 3 show the rearrangement process schematic diagram of the code stream to be processed of a frame image provided by one embodiment of the invention.
Fig. 4 show code stream schematic diagram after the rearrangement of a frame image provided by one embodiment of the invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made with reference to the accompanying drawing further
Detailed description.
Fig. 1 is a kind of flow diagram of the method for video coding for SVAC standard provided by the embodiment of the present invention.
As shown in Figure 1, this method comprises:
Step 101: identifying the interested pixel and background pixel in image to be encoded.Detailed process can are as follows: by row scanning
Sequence successively traverses each pixel of image to be encoded, identifies to be encoded since first pixel of image to be encoded
Interested pixel and background pixel in image.
Step 102: entropy coding being carried out to different interested pixel and background pixel respectively in sequence, is generated respectively not
Same bit stream data interested and background bit stream data.Wherein, the corresponding region of interest of each bit stream data interested
Domain (ROI).
Step 103: according to entropy coding sequence, increasing different bit stream datas interested the label of area-of-interest；It is right
It is that background area marks that background bit stream data, which increases,.
In an embodiment of the present invention, it can be and certain number belonged into same area-of-interest and sequentially connected
Interested pixel encodes a bit stream data packet；The bit stream data packet includes an indicator, is used to indicate current data packet institute
The number of the area-of-interest for the bit stream data interested for including marks.Meanwhile by certain number and sequentially connected back
Scene element is also encoded to a bit stream data packet, which also includes an indicator, indicates current bit stream data packet for back
Scene area.It is described in detail below by Fig. 2.
Fig. 2 show the schematic diagram of internal structure of a data packet of encoding code stream provided by one embodiment of the invention.
As shown in Fig. 2, the size of the data packet is 64bit.Wherein, the size of indicator (Flag) is 4bit, is currently compiled to indicate
Code data packet is background area or ROI region, and the size of bit stream data is 60bit；Specifically, a Flag can be used
" 0000 " indicates that current data packet belongs to background area, respectively indicates current data packet to " 1111 " with " 0001 " and belong to
ROI region 1 is to ROI region 15.Since the bit number that the coding of each pixel occupies is 8, then each data packet can wrap
Information content containing 7.5 (=60/8) a pixels.
When being encoded to bit stream data packet interested to interested pixel, may belong to same area-of-interest and according to
The interested pixel of secondary connection does not reach the preset certain number of data packet, i.e., does not fill up the code stream number interested
It, at this time can be with the coding of the zero polishing data packet according to packet.Such as when all interested of same area-of-interest will be belonged to
After pixel carries out coding packing, there are also 5bit not to be filled for the last one data packet, at this time can " 00000 " polishing data packet
To guarantee the integrality of data packet.Similarly, when the feature number that the inadequate data packet of sequentially connected background pixel is preset,
The coding of the zero polishing data packet can also be used.
However, at this time the corresponding bit stream data interested of each ROI region in the code stream to be processed and background area code
Flow data is discontinuous, it is therefore desirable to reset by later step 104.
Step 104: according to the label of the number label and background area of the area-of-interest, resetting the code to be processed
Flow data generates code stream after resetting.
Fig. 3 show the rearrangement process schematic diagram of the code stream to be processed of a frame image provided by one embodiment of the invention.
As shown in figure 3, step 104 is concretely: reading code stream to be processed again according to the reiteration that ROI region is numbered, successively extract
ROI region 1, ROI region 2 ... ROI region N (N maximum value be ROI quantity, do not exceed 15), all codes of background area
Flow data；And according to ROI region 1, ROI region 2 ... ROI region N (N maximum value be ROI quantity, do not exceed 15), background
The sequence in region rearranges code stream.
Specifically, from the beginning reading a code stream first, all data packets relevant to ROI region 1 are extracted, these are counted
Remove according to the Flag of packet, is arranged in order；Then a code stream is from the beginning read again, extracts all codes relevant to ROI region 2
Stream, the Flag of these code streams is removed, is arranged in order；Code stream is read by being repeated several times, is finally extracted and background area phase
All data packets closed, the Flag of these data packets is removed, is arranged in order.It finally obtains in an example as shown in Figure 4
Rearrangement after code stream.
It will be understood by those skilled in the art that the label of ROI region and background area removal can also unify after rearrangement into
Row, the present invention remove opportunity without limitation to the label of ROI region and background area.
Those skilled in the art it is also understood that since the code stream of background area is not the object of video analysis, because
This can not also extract the data packet for belonging to background area during code stream after forming rearrangement, and only extract region of interest
The data packet in domain.
However rearranged form as above needs to read again that repeatedly code stream to be processed, i.e. how many ROI region just need to read more
It is few all over code stream, there are problems that bandwidth occupancy is excessive and code flow rearrangement overlong time in this way.
In order to solve the problems, such as the Video coding rearrangement method in above embodiments, one embodiment of the invention is additionally provided separately
A kind of Video coding rearrangement method, at this time step 104 include:
Firstly, by memory according to the length of all code streams of each area-of-interest and background area in code stream to be processed
Carry out piecemeal division.Concretely: after encoder completes the coding of piece image, the code stream of all ROI regions and background area
Length can obtain, and carry out piecemeal division according to the code stream length in each region to memory in advance at this time, stripe sequence can are as follows:
ROI region 1, ROI region 2 ... ROI region N (N maximum value is 15), background area.
Secondly, reading the primary code stream to be processed again according to row scan sequence, each area-of-interest and background area are extracted
All code streams in domain are put into output in the corresponding sub-block of the memory and generate code stream after rearrangement.Since coding is scanned according to row
Mode carries out, so the code stream sequence in each region will not malfunction, this rearrangement method can't upset code stream sequence.
Code stream to be processed in Fig. 3 in this way can be directly becoming code stream after rearrangement as shown in Figure 4 after exporting from memory,
And do not have to read again repeatedly.This rearrangement method can only carry out the primary rearrangement read again and can be realized to entire code stream, effectively improve
Code flow rearrangement speed.It solves repeatedly to read again repeatedly simultaneously and carries out that code flow rearrangement bring bandwidth increases and the time too long of asks
Topic, final code stream is in strict conformity with SVAC standard.
In an embodiment of the present invention, after the Flag of all data packets is removed in code stream after it will reset, refer to having removed
Code stream repacks transmission after showing the rearrangement of symbol.For example, repacking transmission according to ICP/IP protocol.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, made any modification, equivalent replacement etc. be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of method for video coding for SVAC standard characterized by comprising
Identify the interested pixel and background pixel in image to be encoded；
Entropy coding is carried out to different interested pixel and background pixel respectively in sequence, generates different codes interested respectively
Flow data and background bit stream data；Wherein, the corresponding area-of-interest of each bit stream data interested；
According to entropy coding sequence, increase different bit stream datas interested the label of area-of-interest；To background bit stream data
Increase is that background area marks；
It is marked according to the number of the area-of-interest and background area, resets code stream to be processed, generate code stream after resetting.
2. the method according to claim 1, wherein in sequence to different interested pixel and background pixel
Entropy coding is carried out respectively, and generating different bit stream data interested and context code flow data respectively includes:
By certain number belong to same area-of-interest and sequentially connected interested pixel is encoded to a code interested
Stream packets；The bit stream data packet interested includes an indicator, is indicated corresponding to current interest bit stream data packet
The number of area-of-interest marks；And/or
Certain number and sequentially connected background pixel is encoded to a context code stream packets, the context code fluxion
It include an indicator according to packet, instruction current data packet is background area.
3. according to the method described in claim 2, it is characterized in that, further comprising:
When sequentially connected background pixel or belong to same area-of-interest and sequentially connected interested pixel is not described enough
When certain number, the coding of bit stream data packet interested and/or context code stream packets described in zero polishing.
4. method according to any one of claims 1 to 3, which is characterized in that after generating rearrangement before code stream, the side
Method further comprises:
Remove the indicator of all bit stream data packets interested and/or context code stream packets.
5. according to the method described in claim 4, it is characterized in that, removing all bit stream data packets interested and/or background
After the indicator of bit stream data packet, further comprise:
Code stream after the rearrangement for having removed indicator is repacked into transmission.
6. according to the method described in claim 2, it is characterized in that, the bit stream data packet interested and/or context code fluxion
Size according to packet is 64bit, wherein the size of the indicator is 4bit.
7. the method stated according to claim 1, which is characterized in that according to the number of area-of-interest label and background area
Label, reset the code stream to be processed, generating code stream after resetting includes:
By the label of the marker number sequence and the background area of the area-of-interest, the code to be processed is successively read again
Stream；It reads all code streams for extracting current interest region or background area again every time, and is sequentially placed into code stream after rearrangement.
8. the method according to claim 1, wherein according to the number of area-of-interest label and background area
The label in domain resets the code stream to be processed, generates code stream after resetting and includes:
Memory is subjected to piecemeal division according to the length of the code stream of each area-of-interest and background area in code stream to be processed；
Read the primary code stream to be processed again, extract each area-of-interest and/or background area all code streams be put into it is described
Output generates code stream after rearrangement in the corresponding sub-block of memory.
9. method according to claim 7 or 8, which is characterized in that read the code stream to be processed again according to row scanning mode.
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| CN102348116A (en) * | 2010-08-03 | 2012-02-08 | 株式会社理光 | Video processing method, video processing device and video processing system |
| CN103402087A (en) * | 2013-07-23 | 2013-11-20 | 北京大学 | Video encoding and decoding method based on gradable bit streams |
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| DE60206738D1 (en) * | 2002-06-11 | 2005-11-24 | St Microelectronics Srl | Variable bit rate video coding method and apparatus |
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| CN101102495A (en) * | 2007-07-26 | 2008-01-09 | 武汉大学 | A video image decoding and encoding method and device based on area |
| CN101420618A (en) * | 2008-12-02 | 2009-04-29 | 西安交通大学 | Adaptive telescopic video encoding and decoding construction design method based on interest zone |
| CN102348116A (en) * | 2010-08-03 | 2012-02-08 | 株式会社理光 | Video processing method, video processing device and video processing system |
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