CN107071494B

CN107071494B - The generation method and system of the binary syntax element of video image frame

Info

Publication number: CN107071494B
Application number: CN201710321874.0A
Authority: CN
Inventors: 李敬园; 桑耀
Original assignee: Zhuhai Jieli Technology Co Ltd
Current assignee: Zhuhai Jieli Technology Co Ltd
Priority date: 2017-05-09
Filing date: 2017-05-09
Publication date: 2019-10-11
Anticipated expiration: 2037-05-09
Also published as: CN107071494A

Abstract

The present invention relates to the generation methods and system of a kind of binary syntax element of video image frame, obtain the syntactic element to be encoded of video image frame, it is grouped, binary conversion treatment is carried out to each group syntactic element group using parallel form, multiple syntactic element binaryzation bit streams are obtained, the binary syntax element for meeting the video image frame of binary arithmetic coding sequence is generated after buffer scheduling.In the present invention, the independence between different type syntactic element is taken full advantage of, each syntactic element is grouped, parallel processing is realized, overcomes the inefficiency problem that conventional serial mode is handled；It can overcome the problems, such as to be not fixed long bit produced by syntactic element binaryzation by caching, realize the output of stable more bit-binary syntactic elements, improve the processing speed of syntactic element binaryzation, the input of stability and high efficiency is provided for subsequent efficient binary arithmetic coding, to improve the code efficiency of CABAC entirety.

Description

The generation method and system of the binary syntax element of video image frame

Technical field

The present invention relates to technical field of video coding, more particularly to a kind of binary syntax element of video image frame Generation method and system.

Background technique

Since the raw image data amount in video is larger, if directly transmitted to it, biggish deposit not only is needed Space is stored up, and to the more demanding of network transmission bandwidth.Therefore, in order to reduce video data transmission bandwidth, transmission number is improved According to code rate, to video image carry out compressed encoding be provided with critically important meaning.

Currently, for different applications, different code rate requirements, many video image expert groups carry out long-term grind Some relevant criterions are studied carefully and establish, including JPEG, JPEG2000, MPEG1, MPEG2, MPEG4, H.261, H.263 etc. Deng.AVC (Advanced Video Coding, advanced video coding) --- also referred to as ITU-T H.264 suggests and MPEG-4 The 10th part standard, referred to as H.264.H.264 the code efficiency than traditional MPEG-4 part 2 is averagely higher by 50%, meanwhile, it is easier to promote than MPEG-4.In addition, the advantages of H.264 having concentrated previous standard, and absorb previous mark The experience accumulated in quasi- formulation.

In H.264/AVC, two kinds of entropy coding methods --- CAVLC (Context Adaptive is used VariableLength Coding, the Variable Length Code based on context) and CABAC (ContextAdaptive Binary Arithmatic Coding, the adaptive binary arithmetic coding based on context).Wherein, CABAC uses efficient arithmetic Coding thinking, while fully considering video flowing ASSOCIATE STATISTICS characteristic, different video flowings can be adaptively adjusted, mentioned significantly High code efficiency；Compared with CAVLC, mean bit rate can be made to decline 9%~14% using CABAC coding, and in low code Its code efficiency advantage becomes apparent in the case of rate.However, CABAC will use a large amount of code table, context model and intermediate change Amount etc. than using much about 10% operand of CAVLC, and needs bigger memory space, and this adds increased answering for realization Therefore miscellaneous degree also becomes H.264/AVC one of key technology bottleneck.

In general, CABAC coding, which is realized, contains two component parts --- and syntactic element binaryzation and binary system are calculated Art coding.Currently, the syntactic element of each 3 bin of period treatment can be supported about CABAC binary arithmetic coding technology, Ground connection enhances H.264/AVC real-time operation ability.

On the other hand, the basic unit as encoder output data, syntactic element are all made of several bits, its table Show some specific physical significance.Therefore, for bit stream is exported with binary arithmetic coding, it just must be first these grammers Element is converted to binary bit one by one, this process is exactly syntactic element binaryzation.However, completing this process needs It is related to a series of scheduling of state switchings and the processing of variable length binary string, substantially has two about this portion of techniques at present Kind: one is being sequentially generated all syntactic elements by serial mode and being converted to binary string；The second is merging specific syntax member Element.Each there are some problems in both above-mentioned technologies, the former serial processing mode at most only supports that each period is raw At the syntactic element of 1 bin, the merging specific syntax elements of the latter are had some limitations, it is difficult to ensure that generating stable More bin syntactic elements.Compared with the stable more bin processing capacities of binary arithmetic coding, traditional syntactic element two-value metaplasia It easily causes processing speed to mismatch at technology, causes the code efficiency of CABAC entirety lower.

Summary of the invention

Based on this, it is necessary to for traditional syntactic element binaryzation generating mode make the code efficiency of CABAC entirety compared with Low problem provides the generation method and system of a kind of binary syntax element of video image frame.

A kind of generation method of the binary syntax element of video image frame, comprising the following steps:

Obtain video image frame syntactic element to be encoded, according to syntactic element classification to syntactic element to be encoded into Row grouping, obtains each group syntactic element group；

Binary conversion treatment is carried out to each syntactic element group simultaneously, obtains multiple syntactic element binaryzation bit streams；

Each syntactic element binaryzation bit stream is cached simultaneously, and according to the bit process of binary arithmetic coding speed Degree is scheduled the syntactic element binaryzation bit stream of all cachings, generates the video figure for meeting binary arithmetic coding sequence As the binary syntax element of frame.

A kind of generation system of the binary syntax element of video image frame, comprising:

Grouped element is obtained, for obtaining the syntactic element to be encoded of video image frame, according to syntactic element classification pair Syntactic element to be encoded is grouped, and obtains each group syntactic element group；

Binarization unit obtains multiple syntactic element two-values for carrying out binary conversion treatment to each syntactic element group simultaneously Change bit stream；

Cache unit, for being cached simultaneously to each syntactic element binaryzation bit stream；

Scheduling unit, for the bit process speed according to binary arithmetic coding to the syntactic element two-value of all cachings Change bit stream to be scheduled, generates the binary syntax element for meeting the video image frame of binary arithmetic coding sequence.

It is to obtain view according to the generation method and system of the binary syntax element of the video image frame of aforementioned present invention The syntactic element to be encoded of frequency picture frame, is grouped it, carries out two to each group syntactic element group using parallel form Value processing, obtains multiple syntactic element binaryzation bit streams, and it is suitable to meet binary arithmetic coding for generation after buffer scheduling The binary syntax element of the video image frame of sequence.In the present invention, it takes full advantage of only between different type syntactic element Vertical property, is grouped each syntactic element, realizes parallel processing, overcomes the inefficiency problem that conventional serial mode is handled； It can overcome the problems, such as to be not fixed long bit produced by syntactic element binaryzation by caching, realize stable more bit-binaries The output of syntactic element；Rearrangement is realized by scheduling, ensure that the correctness of binary syntax element coded sequence, thus Protect each correlation between syntax elements.On the whole, the present invention is in the base for guaranteeing syntactic element coded sequence correctness On plinth, the processing speed of syntactic element binaryzation is improved by parallel processing and caching, is calculated for subsequent efficient binary system Art coding provides the input of stability and high efficiency, to improve the code efficiency of CABAC entirety.

Detailed description of the invention

Fig. 1 is the process signal of the generation method of the binary syntax element of video image frame in one embodiment Figure；

Fig. 2 is the structural representation of the generation system of the binary syntax element of video image frame in one embodiment Figure；

Fig. 3 is that the structure of the generation system of the binary syntax element of video image frame in one of specific embodiment is shown It is intended to；

Fig. 4 is syntactic element packet configuration schematic diagram in one of specific embodiment；

Fig. 5 (a), 5 (b) are Y-component, U component and V component schematic diagram；

Fig. 6 (a), 6 (b), 6 (c) are the schematic diagrames that Y-component, U component and V component carry out that DC, AC are partially separated；

Fig. 7 is the composition schematic diagram of residual block data syntax element group in one of specific embodiment；

Fig. 8 is the grouping schematic diagram of residual block data syntax element group in one of specific embodiment；

Fig. 9 is residual block data syntax element group scheduling process schematic in one of specific embodiment.

Specific embodiment

To make the objectives, technical solutions, and advantages of the present invention more comprehensible, with reference to the accompanying drawings and embodiments, to this Invention is described in further detail.It should be appreciated that the specific embodiments described herein are only used to explain the present invention, And the scope of protection of the present invention is not limited.

It is shown in Figure 1, it is the generation method of the binary syntax element of the video image frame of one embodiment of the invention Flow diagram.The generation method of the binary syntax element of video image frame in the embodiment the following steps are included:

Step S101: the syntactic element to be encoded of video image frame is obtained, according to syntactic element classification to be encoded Syntactic element is grouped, and obtains each group syntactic element group；

Step S102: while binary conversion treatment is carried out to each syntactic element group, obtain multiple syntactic element binaryzation bits Stream；

In this step, binary conversion treatment is carried out to each syntactic element group using parallel mode, obtains multiple syntactic elements Binaryzation bit stream can shorten the time of binary conversion treatment with this；

Step S103: each syntactic element binaryzation bit stream is cached simultaneously, and according to binary arithmetic coding Bit process speed is scheduled the syntactic element binaryzation bit stream of all cachings, and it is suitable that generation meets binary arithmetic coding The binary syntax element of the video image frame of sequence.

In the present embodiment, the syntactic element to be encoded for obtaining video image frame, is grouped it, using parallel Mode carries out binary conversion treatment to each group syntactic element group, multiple syntactic element binaryzation bit streams is obtained, by buffer scheduling The binary syntax element for meeting the video image frame of binary arithmetic coding sequence is generated afterwards.In the present invention, it makes full use of Independence between different type syntactic element, is grouped each syntactic element, realizes parallel processing, overcomes traditional string The inefficiency problem of line mode processing；It can be overcome by caching and be not fixed asking for long bit produced by syntactic element binaryzation Topic, realizes the output of stable more bit-binary syntactic elements；Rearrangement is realized by scheduling, ensure that binary syntax The correctness of element coded sequence, to protect each correlation between syntax elements.On the whole, this programme is guaranteeing language On the basis of method element coded sequence correctness, the processing of syntactic element binaryzation is improved by parallel processing and caching Speed provides the input of stability and high efficiency for subsequent efficient binary arithmetic coding, to improve the coding effect of CABAC entirety Rate.

Each group syntactic element group includes macro block (mb) type syntactic element group, macroblock prediction grammer in one of the embodiments, Element group, sub-macroblock residuum coding scheme syntactic element group and residual block data syntax element group.

In the present embodiment, according to macro block (mb) type, macroblock prediction, sub-macroblock residuum coding scheme, residual block data this four Kind classification is grouped syntactic element, so that it may which all syntactic elements including screen image procossing both can handle all Syntactic element, while avoiding the quantity of parallel processing excessive, reduce the requirement to hardware.

Residual block data syntax element group includes 1 brightness YDC component, 16 brightness YAC in one of the embodiments, Component, 1 coloration UDC component, 1 coloration VDC component, 4 coloration UAC components and 4 coloration VAC components；

The step of being grouped according to syntactic element classification to syntactic element to be encoded, obtaining each group syntactic element group is wrapped Include following steps:

Residual block data syntax element group is grouped, five groups of sub- residual error syntactic element groups are obtained；Wherein, one group of son is residual Poor syntactic element group includes 1 brightness YDC component, 1 coloration UDC component and 1 coloration VDC component；Other four groups of sub- residual errors Syntactic element group respectively includes four brightness YAC components, 1 coloration UAC component and 1 coloration VAC component；

Simultaneously to each syntactic element group carry out binary conversion treatment the step of the following steps are included:

Simultaneously to macro block (mb) type syntactic element group, macroblock prediction syntactic element group, sub-macroblock residuum coding scheme grammer member Element group and five groups of sub- residual error syntactic element groups carry out binary conversion treatment.

In the present embodiment, residual block data syntax element group includes 1 brightness YDC component, 16 brightness YAC components, 1 A coloration UDC component, 1 coloration VDC component, 4 coloration UAC components and 4 coloration VAC components；The quantity of component up to 27 It is a, it is divided into five groups of sub- residual error syntactic element groups and carries out parallel binary conversion treatment, can be further improved in actual pairing two The efficiency of value processing.

Four brightness YAC components are respectively the first brightness YAC component, the second brightness YAC points in one of the embodiments, Amount, third brightness YAC component, the 4th brightness YAC component；

The step of binary conversion treatment is carried out to one group of sub- residual error syntactic element group the following steps are included:

Binary conversion treatment successively is carried out to brightness YDC component, coloration UDC component and coloration VDC component；In previous component pair After the syntactic element binaryzation bit stream answered is read and dispatches, then carry out the binary conversion treatment of latter component；

The step of binary conversion treatment is carried out to other four groups sub- residual error syntactic element groups the following steps are included:

For any one group in other four groups sub- residual error syntactic element groups, successively to the first brightness YAC component, second bright It spends YAC component, third brightness YAC component, the 4th brightness YAC component, coloration UAC component and coloration VAC component and carries out binaryzation Processing；After the corresponding syntactic element binaryzation bit stream of previous component is read and dispatches, then carry out the two-value of latter component Change processing.

In the present embodiment, each group syntactic element group is to carry out binary conversion treatment simultaneously, meets binary system calculation to generate The binary syntax element of the video image frame of art coded sequence, according to the bit process speed of binary arithmetic coding to all The syntactic element binaryzation bit stream of caching, which is scheduled, to need successively to carry out, each syntactic element binaryzation bit stream is two It is separated by the indefinite processing time between secondary scheduling, within this processing time, it is sufficient to complete to next language in syntactic element group The binary conversion treatment of method element will not influence whole parallel processing, can also reduce the load of parallel processing, avoid data It is overlapping.

Optionally, macro block (mb) type syntactic element group, macroblock prediction syntactic element group, sub-macroblock residuum coding scheme grammer member The binary conversion treatment of each syntactic element in plain group is also successively to carry out.

In one of the embodiments, according to the bit process speed of binary arithmetic coding to the grammer member of all cachings The step of plain binaryzation bit stream is scheduled the following steps are included:

When binaryzation bit number in the syntactic element binaryzation bit stream of caching is greater than 2, to the syntactic element of caching Binaryzation bit stream is scheduled.

In the present embodiment, since current binary arithmetic coding can support the grammer member of 3 bin of each period treatment Element, therefore can be when the binaryzation bit number in the syntactic element binaryzation bit stream of caching is greater than 2, to the grammer member of caching Plain binaryzation bit stream is scheduled, and is matched with the processing speed of binary arithmetic coding, and CABAC entirety is further increased Code efficiency.

The step of caching simultaneously to each syntactic element binaryzation bit stream in one of the embodiments, includes following Step:

Each syntactic element binaryzation bit stream is cached simultaneously by different cache modules, wherein respectively cache mould Block and each syntactic element group correspond；

The syntactic element binaryzation bit stream of all cachings is carried out according to the bit process speed of binary arithmetic coding The step of scheduling the following steps are included:

Setting grouping select finger will when starting the syntactic element binaryzation bit stream to all cachings and being scheduled Grouping select finger is successively directed toward the caching mould of the cache module of macro block (mb) type syntactic element group, macroblock prediction syntactic element group The cache module of block, the cache module of sub-macroblock residuum coding scheme syntactic element group and five groups of sub- residual error syntactic element groups, it is right The syntactic element binaryzation bit stream in cache module that grouping select finger is directed toward is read out.

In the present embodiment, different cache modules is configured for different syntactic element groups, and grouping selection is set and is referred to Needle is directed toward different cache modules, and can prompt current scheduling reading is the syntactic element binaryzation ratio of which kind of syntactic element group Spy's stream, determines the process of current binary arithmetic coding.

Grouping select finger is successively directed toward to the caching mould of five groups of sub- residual error syntactic element groups in one of the embodiments, The step of block, the syntactic element binaryzation bit stream in cache module being directed toward to grouping select finger is read out includes following Step:

Judge whether macro block (mb) type is 16 × 16 block of pixels in frame, if so, it is residual to be grouped select finger one group of son of direction The corresponding cache module of poor syntactic element group, to brightness YDC points in the corresponding cache module of one group of sub- residual error syntactic element group The syntactic element binaryzation bit stream of amount is read out, and judges the first brightness in other four groups sub- residual error syntactic element groups Whether YAC component is all full null component；

If it is not, grouping select finger is successively then directed toward the corresponding cache module of other four groups sub- residual error syntactic element groups, To the syntactic element binaryzation ratio of the first brightness YAC component in the corresponding cache module of other four groups sub- residual error syntactic element groups Spy's stream is successively read out, and judges whether the second brightness YAC component in other four groups sub- residual error syntactic element groups is all complete Null component；

If it is not, grouping select finger is successively then directed toward the corresponding cache module of other four groups sub- residual error syntactic element groups, To the syntactic element binaryzation ratio of the second brightness YAC component in the corresponding cache module of other four groups sub- residual error syntactic element groups Spy's stream is successively read out, and judges whether the third brightness YAC component in other four groups sub- residual error syntactic element groups is all complete Null component；

If it is not, grouping select finger is successively then directed toward the corresponding cache module of other four groups sub- residual error syntactic element groups, To the syntactic element binaryzation ratio of the third brightness YAC component in the corresponding cache module of other four groups sub- residual error syntactic element groups Spy's stream is successively read out, and judges whether the 4th brightness YAC component in other four groups sub- residual error syntactic element groups is all complete Null component；

If it is not, grouping select finger is successively then directed toward the corresponding cache module of other four groups sub- residual error syntactic element groups, To the syntactic element binaryzation ratio of the 4th brightness YAC component in the corresponding cache module of other four groups sub- residual error syntactic element groups Spy's stream is successively read out, and whether all to judge the coloration UDC component in one group of sub- residual error syntactic element group and coloration VDC component For full null component；

If it is not, the corresponding cache module of the sub- residual error syntactic element group of one group of select finger direction will be then grouped, to one group of son The syntactic element binaryzation bit of coloration UDC component and coloration VDC component in the corresponding cache module of residual error syntactic element group Stream is read out, and judge coloration UAC component and coloration the VAC component in other four groups sub- residual error syntactic element groups whether be all Full null component；

If it is not, grouping select finger is successively then directed toward the corresponding cache module of other four groups sub- residual error syntactic element groups, To the grammer member of coloration UAC component and coloration VAC component in the corresponding cache module of other four groups sub- residual error syntactic element groups Plain binaryzation bit stream is read out.

In the present embodiment, to the data of the cache module of five groups of sub- residual error syntactic element groups, according to current macro and language The state of method element group carries out selection reading.The basic processing unit size of the macro block of video image is 16 × 16 block of pixels, only Have and meet this format, will just be grouped the corresponding cache module of the sub- residual error syntactic element group of one group of select finger direction and to wherein The syntactic element binaryzation bit stream of brightness YDC component be read out, grouping select finger is directed toward other four groups sons later The corresponding cache module of residual error syntactic element group, the syntactic element binaryzation to the brightness YAC component for wherein belonging to nonzero component Bit stream is orderly read, then will be grouped the corresponding cache module of the sub- residual error syntactic element group of one group of select finger direction, right The syntactic element binaryzation bit stream of the coloration UDC component and coloration VDC component that wherein belong to nonzero component is orderly read, Grouping select finger is finally directed toward the corresponding cache module of other four groups sub- residual error syntactic element groups, to wherein belonging to non-zero The coloration UAC component of amount and the syntactic element binaryzation bit stream of coloration VAC component are orderly read, and are realized residual to five groups of sons The orderly scheduling of the data of the cache module of poor syntactic element group is allowed to meet the requirement of binary arithmetic coding, improves coding Efficiency.

If macro block (mb) type is not 16 × 16 block of pixels in frame, executes and judge in other four groups sub- residual error syntactic element groups The step of whether the first brightness YAC component is all full null component；

If the first brightness YAC component in other four groups sub- residual error syntactic element groups is all full null component, judgement is executed The step of whether the second brightness YAC component in other four groups sub- residual error syntactic element groups is all full null component；

If the second brightness YAC component in other four groups sub- residual error syntactic element groups is all full null component, judgement is executed The step of whether the third brightness YAC component in other four groups sub- residual error syntactic element groups is all full null component；

If the third brightness YAC component in other four groups sub- residual error syntactic element groups is all full null component, judgement is executed The step of whether the 4th brightness YAC component in other four groups sub- residual error syntactic element groups is all full null component；

If the 4th brightness YAC component in other four groups sub- residual error syntactic element groups is all full null component, judgement is executed The step of whether coloration UDC component and coloration VDC component in one group of sub- residual error syntactic element group are all full null component；

If the coloration UDC component and coloration VDC component in one group of sub- residual error syntactic element group are all full null component, execute Judge coloration UAC component in other four groups sub- residual error syntactic element groups and coloration VAC component whether all for the step of full null component Suddenly.

In the present embodiment, if macro block (mb) type is not 16 × 16 block of pixels in frame, the grammer of brightness YDC component is not read Element binaryzation bit stream, directly judge the first brightness YAC component in other four groups sub- residual error syntactic element groups whether be all Full null component；When respective components in other four groups sub- residual error syntactic element groups are full null component, then the component is not read Syntactic element binaryzation bit stream, directly judge whether next component in other four groups sub- residual error syntactic element groups all incomplete Null component；Judge coloration UDC component in one group of sub- residual error syntactic element group and coloration VDC component whether all for complete zero again later Component is not read then when coloration UDC component and coloration VDC component in one group of sub- residual error syntactic element group are all full null component The syntactic element binaryzation bit stream for taking coloration UDC component and coloration VDC component directly judges other four groups sub- residual error grammer members Whether coloration UAC component and coloration VAC component in plain group are all full null component.It can be so complete zero encountering respective components When the case where component, without being read, accelerate the process for generating binary syntax element.

Macro block (mb) type syntactic element group includes brightness CBP, the color of 16 × 16 block of pixels in frame in one of the embodiments, Spend the partitioning scheme of CBP and prediction mode and inter-pixel block；

It includes the prediction mode of intra-frame 4 * 4 block of pixels, inter-pixel block that macroblock prediction, which is grouped included syntactic element, Reference frame index and motion vector difference；

Sub-macroblock residuum coding scheme is grouped the brightness CBP and color that included syntactic element includes intra-frame 4 * 4 block of pixels Spend the brightness CBP and chrominance C BP and current macro quantization parameter residual error of CBP, inter-pixel block.

In the present embodiment, by the brightness CBP, chrominance C BP and prediction mode, inter-pixel block of 16 × 16 block of pixels in frame Partitioning scheme, the prediction mode of intra-frame 4 * 4 block of pixels, the reference frame index of inter-pixel block, motion vector difference, 4 in frame × The brightness CBP and chrominance C BP of 4 block of pixels, the brightness CBP and chrominance C BP of inter-pixel block and current macro quantization parameter are residual Difference is being grouped according to the progress of above-mentioned classification, is both considered correlation between syntax elements, is also taken full advantage of syntactic element Independence can make the syntactic element binaryzation bit stream obtained more stable.

According to the generation method of the binary syntax element of above-mentioned video image frame, the embodiment of the present invention also provides a kind of view The generation system of the binary syntax element of frequency picture frame, below with regard to the binary syntax element of video image frame of the invention The embodiment of generation system is described in detail.

It is shown in Figure 2, it is the generation system of the binary syntax element of the video image frame of one embodiment of the invention Structural schematic diagram.The generation system of the binary syntax element of video image frame in the embodiment includes:

Grouped element 210 is obtained, for obtaining the syntactic element to be encoded of video image frame, according to syntactic element classification Syntactic element to be encoded is grouped, each group syntactic element group is obtained；

Binarization unit 220 obtains multiple syntactic elements two for carrying out binary conversion treatment to each syntactic element group simultaneously Value bit stream；

Cache unit 230, for being cached simultaneously to each syntactic element binaryzation bit stream；

Scheduling unit 240, for the bit process speed according to binary arithmetic coding to the syntactic element of all cachings Binaryzation bit stream is scheduled, and generates the binary syntax element for meeting the video image frame of binary arithmetic coding sequence.

It obtains grouped element 210 to be grouped residual block data syntax element group, obtains five groups of sub- residual error syntactic elements Group；Wherein, one group of sub- residual error syntactic element group includes that 1 brightness YDC component, 1 coloration UDC component and 1 coloration VDC divide Amount；Other four groups sub- residual error syntactic element groups respectively include four brightness YAC components, 1 coloration UAC component and 1 coloration VAC Component；

Binarization unit 220 simultaneously compiles macro block (mb) type syntactic element group, macroblock prediction syntactic element group, sub-macroblock residual error Code scheme syntactic element group and five groups of sub- residual error syntactic element groups carry out binary conversion treatment.

Binarization unit 220 successively carries out at binaryzation brightness YDC component, coloration UDC component and coloration VDC component Reason；After the corresponding syntactic element binaryzation bit stream of previous component is scheduled, then carry out the binary conversion treatment of latter component；Needle To any one group in other four groups sub- residual error syntactic element groups, successively to the first brightness YAC component, the second brightness YAC component, Third brightness YAC component, the 4th brightness YAC component, coloration UAC component and coloration VAC component carry out binary conversion treatment；Previous After the corresponding syntactic element binaryzation bit stream of component is scheduled, then carry out the binary conversion treatment of latter component.

Binaryzation of the scheduling unit 240 in the syntactic element binaryzation bit stream of caching in one of the embodiments, When bit number is greater than 2, the syntactic element binaryzation bit stream of caching is scheduled.

In one of the embodiments, as shown in figure 3, cache unit 230 includes multiple and different cache module 232, no Same caching mould, 232 pairs of each syntactic element binaryzation bit streams cache simultaneously, wherein cache module 232 and syntactic element Binaryzation bit stream corresponds；

The setting grouping select finger of scheduling unit 240, flows into starting the syntactic element binaryzation bit to all cachings When row scheduling, grouping select finger is successively directed toward the cache module of macro block (mb) type syntactic element group, macroblock prediction syntactic element The cache module of group, the cache module of sub-macroblock residuum coding scheme syntactic element group and five groups of sub- residual error syntactic element groups it is slow Storing module, the syntactic element binaryzation bit stream in cache module being directed toward to grouping select finger are read out.

Scheduling unit 240 judges whether macro block (mb) type is 16 × 16 block of pixels in frame in one of the embodiments, if It is that will then be grouped the corresponding cache module of the sub- residual error syntactic element group of one group of select finger direction, to one group of sub- residual error grammer member The syntactic element binaryzation bit stream that element organizes the brightness YDC component in corresponding cache module is read out, and judge other four Whether the first brightness YAC component in the sub- residual error syntactic element group of group is all full null component；

Scheduling unit 240 when macro block (mb) type is not 16 × 16 block of pixels in frame, sentence by execution in one of the embodiments, The step of whether the first brightness YAC component in other four groups sub- residual error syntactic element groups of breaking all is full null component；

When the first brightness YAC component in other four groups sub- residual error syntactic element groups is all full null component, then executes and sentence The step of whether the second brightness YAC component in other four groups sub- residual error syntactic element groups of breaking all is full null component；

When the second brightness YAC component in other four groups sub- residual error syntactic element groups is all full null component, judgement is executed The step of whether the third brightness YAC component in other four groups sub- residual error syntactic element groups is all full null component；

When third brightness YAC component in other four groups sub- residual error syntactic element groups is all full null component, judgement is executed The step of whether the 4th brightness YAC component in other four groups sub- residual error syntactic element groups is all full null component；

When the 4th brightness YAC component in other four groups sub- residual error syntactic element groups is all full null component, judgement is executed The step of whether coloration UDC component and coloration VDC component in one group of sub- residual error syntactic element group are all full null component.

When coloration UDC component and coloration VDC component in one group of sub- residual error syntactic element group are all full null component, execute Judge coloration UAC component in other four groups sub- residual error syntactic element groups and coloration VAC component whether all for the step of full null component Suddenly.

The two of the generation system of the binary syntax element of video image frame of the invention and video image frame of the invention The generation method of system syntactic element corresponds, in the reality of the generation method of the binary syntax element of above-mentioned video image frame Apply the generation system that technical characteristic and its advantages described in example are suitable for the binary syntax element of video image frame Embodiment in.

In a specific embodiment, the essence of the generation method of the binary syntax element of video image frame is parallel Binary syntax element is generated, mainly by the way that syntactic element to be encoded is grouped according to classification, respectively to each grouping Carry out parallel binaryzation.

The corresponding system of generation method of the binary syntax element of video image frame as shown in figure 3, including: it is parallel Binary syntax Element generation unit, multiple cache units, buffer scheduling unit.

Further, above-mentioned " according to classification " is not limit specific classification method, and being essentially can be every two One group of adjacent syntactic element point.It is contemplated that the balance of actual hardware logical area and speed, in the present invention, nationwide examination for graduation qualification Consider syntactic element correlation and independence is grouped, such as: macro block (mb) type is grouped, macroblock prediction mode is grouped, sub-macroblock residual error Encoding scheme (CBP) grouping, residual block data grouping；

Further, above-mentioned " binaryzation ", be H.264/AVC as defined in series of standards translation operation, mainly wrap Include: unitary (U) binaryzation, series connection unitary/k rank sequence exp_golomb (UEGk) binaryzation, is consolidated truncation unitary (TU) binaryzation Measured length (FL) binaryzation；

It is cached by cache module, cache module is mainly by a certain number of register groups at by can be simultaneously On the one hand the mode of read-write receives the random length binary bit stream of parallel output in input terminal, on the other hand steady in output end Surely multiple binary syntax elements are sent out.Since the syntax in H.264 standard is all to constitute syntax by well-designed Each syntactic element be all it is complementary, relevance is very strong.Therefore need to cache module export binary syntax element into Row buffer scheduling is mainly used for the parallel binary syntactic element that multiple cache modules export to resequence, composition one Consecutive meets the syntactic element binary bits of coded sequence, and Subsequent arithmetic coding is carried out after output；

Further, the sequence of above-mentioned " rearrangement " is primarily referred to as: first coded macroblocks type syntax element, is re-encoded macro Then block prediction mode syntactic element encodes sub-macroblock residuum coding scheme (CBP) and quantization parameter deviant (DQP) grammer member Element finally re-encodes residual block data syntax element.

The generation method of the binary syntax element of video image frame of the invention takes full advantage of different type grammer member Independence between element is grouped each syntactic element, realizes parallel processing, overcomes the efficiency that conventional serial mode is handled Low problem；Aiming at the problem that being not fixed long bit produced by syntactic element binaryzation, using the caching mould that reads while write of support Block realizes the output of stable more Bit Syntax Elements；Finally, carrying out rearrangement operation by buffer scheduling, ensure that The correctness of syntactic element coded sequence, to protect each correlation between syntax elements.On the whole, the present invention is protecting On the basis of demonstrate,proving syntactic element coded sequence correctness, syntactic element binaryzation is improved by parallel processing and caching Processing speed provides the input of stability and high efficiency for subsequent efficient binary arithmetic coding.

Considering correlation between syntax elements, and on the basis of making full use of its independence, Fig. 4 proposes one kind Syntactic element packet configuration.

Macro block (mb) type, which is grouped included syntactic element, to be had: 16 × 16 pieces of brightness, chrominance C BP, prediction mode in frame, and The partitioning scheme of interframe block；

Macroblock prediction, which is grouped included syntactic element, to be had: the prediction mode of intra-frame 4 * 4 block and the reference frame of interframe block Index and motion vector difference MVD；

Sub-macroblock residuum coding scheme, which is grouped included syntactic element, to be had: the brightness of intra-frame 4 * 4 block, chrominance C BP, frame Between block brightness, chrominance C BP and current macro quantization parameter residual error (DQP)；

The syntactic element that residual block data grouping is included has: 14 × 4 brightness YDC component, 16 4 × 4 brightness YAC component, 14 × 4 coloration UDC component, 14 × 4 coloration VDC component, 44 × 4 coloration UAC components and 44 × 4 coloration VAC component.

One macro block includes the Y-component of 1 16 × 16 pixel size, the U component of 18 × 8 pixel size, 18 × 8 picture The V component of plain size, Y-component are luminance component, and U component and V component are chromatic component, as shown in Fig. 5 (a), Fig. 5 (b), Middle Y-component, U component and V component can be divided into 4 × 4 block of pixels, and the basic unit of CABAC residual coding is also above-mentioned One 4 × 4 block of pixels.For compression rates increases, therefore DC, AC are carried out to Y-component, U component and V component and are partially separated, Specific such as Fig. 6 (a), Fig. 6 (b), Fig. 6 (c) are shown, it can be seen that the part DC is exactly being partially separated out pixel serial number 0 Come, reformulates a new 4x4 block of pixels；The part AC is then remaining part after removal DC pixel.

In H.264/AVC, the basic processing unit size of a macro block is 16 × 16 pixels, first three above-mentioned grouping institute The syntactic element for including only needs to handle once in each macro block, and CABAC residual block syntax element basic processing unit is big Small is 4 × 4 pixels, and the residual block composition of a macro block is as shown in Figure 7: 14 × 4 brightness YDC component, 16 4 × 4 bright Spend YAC component, 14 × 4 coloration UDC component, 14 × 4 coloration VDC component, 44 × 4 coloration UAC and 44 × 4 Coloration VAC component.Therefore, for residual block data syntax element, each macro block requires at most to want sequential processes 27 times. In order to realize the processing of parallel syntactic element, need specially further to be grouped residual block data grouping.

Fig. 8 gives residual block data sub-packet method.

First, 4 × 4 pieces of syntactic elements of YDC, UDC, VDC in Fig. 7 are formed sub- residual error grouping 0；

Second, 4 × 4 pieces of syntactic elements of YAC0, YAC4, YAC8, YAC12, UAC0, VAC0 in Fig. 7 are formed sub- residual error Grouping 1；

4 × 4 pieces of syntactic elements of YAC1, YAC5, YAC9, YAC13, UAC1, VAC1 in Fig. 7 are formed sub- residual error by third Grouping 2；

4th, 4 × 4 pieces of syntactic elements of YAC2, YAC6, YAC10, YAC14, UAC2, VAC2 in Fig. 7 are formed sub- residual error Grouping 3；

5th, 4 × 4 pieces of syntactic elements of YAC3, YAC7, YAC11, YAC15, UAC3, VAC3 in Fig. 7 are formed sub- residual error Grouping 4；

According to Fig. 3, Fig. 4 and Fig. 8, the process of parallel generation binary syntax element can be clearly understood: compiling in CABAC When code starts, syntactic element to be encoded (such as macro block (mb) type, macroblock prediction mode) is first read, then according to above-mentioned grouping Each syntactic element is divided into 8 groups by method, concurrently and independently binaryzation is carried out to the syntactic element of each grouping, then two Bit stream after value is respectively written into respective cache module.It can be verified in actual use situation, pass through this grouping The mechanism of parallel binaryzation syntactic element can achieve during being grouped progress binaryzation to macroblock prediction, be completed at the same time The effect of the binarization of YDC, YAC0, YAC1, YAC2, YAC3 block in Fig. 5.

Due to using the structure of parallel binaryzation, multiple syntactic element binaryzation bit streams can export simultaneously, in order to protect Card data are not spilt over, therefore cache module is very necessary.In practical engineering applications, using FIFO (First Input First Output, First Input First Output) for module as cache module, entire process of caching is as follows: each fifo module defines one Has_bit variable, for indicating present fifo module storage binaryzation number of bits, when parallel binaryzation inputs a bit's Bit stream just allows has_bit from adding 1, is exactly to indicate there is binaryzation bit number in FIFO when has_bit variable is greater than 0, can export Multiple binaryzation bits carry out arithmetic coding.In this practical engineering application, due to binary arithmetic coding could support up it is each 3 binaryzation bits of period treatment, so fifo module is also limited to 3 binaryzation bits of primary at most output, such as: if Has_bit >=3, export 3bit；If has_bit==2 exports 2bit；If has_bit==1 exports 1bit； If has_bit==0, indicates there is no data in FIFO, do not export.In terms of actual effect, when completion sub-macroblock residual coding After the arithmetic coding of scheme, the has_bit that every sub- residual error is grouped corresponding fifo module can stablize every time 30 or more Export 3 binaryzation bits.

Since CABAC uses context-based arithmetic coding, the variation of the coded sequence of two kinds of different syntactic elements Actual video bit stream bit will be influenced, i.e., there are certain correlations between syntactic element, therefore the present embodiment has used one A buffer scheduling unit realizes the switching and scheduling of each grouping FIFO output, on the one hand protects syntactic element coded sequence Correctness, on the other hand realize FIFO output seamless switching, ensure that stable output output.

Wherein, the scheduling flow that the present embodiment uses is as follows:

One grouping select finger sel is set in buffer scheduling module, currently selects which grouping to correspond to for prompting FIFO output；

When encoding a macro block and starting, sel is directed toward macro block (mb) type and is grouped FIFO, once has_bit in grouping FIFO Greater than 0, reads and export from grouping FIFO, send to arithmetic coding；

After completing all macro block (mb) type syntactic element binaryzations and the grouping data fifo has been read, sel is directed toward macro Block prediction mode is grouped FIFO, once has_bit is greater than 0 in grouping FIFO, reads and exports from grouping FIFO, send to arithmetic Coding；

After completing all macroblock prediction mode syntactic element binaryzations and the grouping data fifo has been read, sel is referred to It is grouped FIFO to sub-macroblock residuum coding scheme, once has_bit is greater than 0 in grouping FIFO, is read from grouping FIFO defeated Out, it send to arithmetic coding；

After completing all sub-macroblock residuum coding scheme syntactic element binaryzations and the grouping data fifo has been read, Sel is directed toward residual block data grouping FIFO, and residual block data sub-packet FIFO scheduling flow is as shown in Figure 9:

CBP (coded block pattern) refers to the residuum coding scheme of each fritter of brightness and chromatic component.It is so-called Residual error scheme includes:

(1) all residual errors (including DC, AC) all encode.

(2) only to DC coefficient coding.

(3) all residual errors (including DC, AC) do not encode.

Specifically, CBP mono- shares 9bit, i.e. CBP [8:0].

CBP [0]: at least one non-zero residual error 4x4 block of YAC0, YAC1, YAC2, YAC3 is indicated for 1；For 0 indicate YAC0, YAC1, YAC2, YAC3 are entirely complete zero residual error 4x4 block.

CBP [1]: at least one non-zero residual error 4x4 block of YAC4, YAC5, YAC6, YAC7 is indicated for 1；For 0 indicate YAC4, YAC5, YAC6, YAC7 are entirely complete zero residual error 4x4 block.

CBP [2]: at least one non-zero residual error 4x4 block of YAC8, YAC9, YAC10, YAC11 is indicated for 1；It is indicated for 0 YAC8, YAC9, YAC10, YAC11 are entirely complete zero residual error 4x4 block.

CBP [3]: at least one non-zero residual error 4x4 block of YAC12, YAC13, YAC14, YAC15 is indicated for 1；It is indicated for 0 YAC12, YAC13, YAC14, YAC15 are entirely complete zero residual error 4x4 block.

CBP [5:4]: UAC0, UAC1, UAC2, UAC3, VAC0, VAC1, VAC2, VAC3, UDC, VDC are indicated all for 0 It is complete zero residual error 4x4 block；For 1 expression UDC, VDC, at least one is non-zero residual error 4x4 block, UAC0, UAC1, UAC2, UAC3, VAC0, VAC1, VAC2, VAC3 are entirely complete zero residual error 4x4 block；For 2 indicate UAC0, UAC1, UAC2, UAC3, VAC0, At least one is non-zero residual error 4x4 block by VAC1, VAC2, VAC3, UDC, VDC at least one be non-zero residual error 4x4 block；It is 3 It is undefined.

CBP [6]: indicate that YDC is non-zero residual error 4x4 block for 1；Indicate that YDC is complete zero residual error 4x4 block for 0.

CBP [7]: indicate that UDC is non-zero residual error 4x4 block for 1；Indicate that UDC is complete zero residual error 4x4 block for 0.

CBP [8]: indicate that VDC is non-zero residual error 4x4 block for 1；Indicate that VDC is complete zero residual error 4x4 block for 0.

Firstly, carrying out branch according to macro block (mb) type: if macro block (mb) type is 16 × 16 pieces in frame, sel is directed toward YDC grouping FIFO；Otherwise the value for needing further to judge CBP, if CBP [0] non-zero, sel is directed toward YAC0 and is grouped FIFO；Else if CBP [1] non-zero, then sel is directed toward YAC4 and is grouped FIFO；Else if CBP [2] non-zero, then sel is directed toward YAC8 and is grouped FIFO；It is no Then if CBP [3] non-zero, sel is directed toward YAC12 and is grouped FIFO；Else if CBP [5:4] non-zero, then sel is directed toward UDC grouping FIFO；Otherwise current macro residual error syntactic element terminates.

When sel is directed toward YDC grouping FIFO, after completing YDC syntactic element binaryzation and the grouping data fifo is read After complete, sel is directed toward YAC0 and is grouped FIFO.

When sel is directed toward YAC0 grouping FIFO, after completing YAC0 syntactic element binaryzation and the grouping data fifo is read After taking, sel is directed toward YAC1 and is grouped FIFO.

When sel is directed toward YAC1 grouping FIFO, after completing YAC1 syntactic element binaryzation and the grouping data fifo is read After taking, sel is directed toward YAC2 and is grouped FIFO.

When sel is directed toward YAC2 grouping FIFO, after completing YAC2 syntactic element binaryzation and the grouping data fifo is read After taking, sel is directed toward YAC3 and is grouped FIFO.

When sel is directed toward YAC3 grouping FIFO, after completing YAC3 syntactic element binaryzation and the grouping data fifo is read After taking, need further to judge the value of CBP, if CBP [1] non-zero, sel is directed toward YAC4 and is grouped FIFO；Else if CBP [2] non-zero, then sel is directed toward YAC8 and is grouped FIFO；Else if CBP [3] non-zero, then sel is directed toward YAC12 and is grouped FIFO；Otherwise If CBP [5:4] non-zero, sel is directed toward UDC and is grouped FIFO；Otherwise current macro residual error syntactic element terminates.

When sel is directed toward YAC4 grouping FIFO, after completing YAC4 syntactic element binaryzation and the grouping data fifo is read After taking, sel is directed toward YAC5 and is grouped FIFO.

When sel is directed toward YAC5 grouping FIFO, after completing YAC5 syntactic element binaryzation and the grouping data fifo is read After taking, sel is directed toward YAC6 and is grouped FIFO.

When sel is directed toward YAC6 grouping FIFO, after completing YAC6 syntactic element binaryzation and the grouping data fifo is read After taking, sel is directed toward YAC7 and is grouped FIFO.

When sel is directed toward YAC7 grouping FIFO, after completing YAC7 syntactic element binaryzation and the grouping data fifo is read After taking, need further to judge the value of CBP, if CBP [2] non-zero, sel is directed toward YAC8 and is grouped FIFO；Else if CBP [3] non-zero, then sel is directed toward YAC12 and is grouped FIFO；Else if CBP [5:4] non-zero, then sel is directed toward UDC and is grouped FIFO；Otherwise Current macro residual error syntactic element terminates.

When sel is directed toward YAC8 grouping FIFO, after completing YAC8 syntactic element binaryzation and the grouping data fifo is read After taking, sel is directed toward YAC9 and is grouped FIFO.

When sel is directed toward YAC9 grouping FIFO, after completing YAC9 syntactic element binaryzation and the grouping data fifo is read After taking, sel is directed toward YAC10 and is grouped FIFO.

When sel is directed toward YAC10 grouping FIFO, after completing YAC10 syntactic element binaryzation and the grouping data fifo After having read, sel is directed toward YAC11 and is grouped FIFO.

When sel is directed toward YAC11 grouping FIFO, after completing YAC11 syntactic element binaryzation and the grouping data fifo After having read, need further to judge the value of CBP, if CBP [3] non-zero, sel is directed toward YAC12 and is grouped FIFO；Else if CBP [5:4] non-zero, then sel is directed toward UDC and is grouped FIFO；Otherwise current macro residual error syntactic element terminates.

When sel is directed toward YAC12 grouping FIFO, after completing YAC12 syntactic element binaryzation and the grouping data fifo After having read, sel is directed toward YAC13 and is grouped FIFO.

When sel is directed toward YAC13 grouping FIFO, after completing YAC13 syntactic element binaryzation and the grouping data fifo After having read, sel is directed toward YAC14 and is grouped FIFO.

When sel is directed toward YAC14 grouping FIFO, after completing YAC14 syntactic element binaryzation and the grouping data fifo After having read, sel is directed toward YAC15 and is grouped FIFO.

When sel is directed toward YAC15 grouping FIFO, after completing YAC11 syntactic element binaryzation and the grouping data fifo After having read, need further to judge the value of CBP, if CBP [5:4] non-zero, sel is directed toward UDC and is grouped FIFO；Otherwise current Macroblock residuals syntactic element terminates.

When sel is directed toward UDC grouping FIFO, after completing UDC syntactic element binaryzation and the grouping data fifo is read After complete, sel is directed toward VDC and is grouped FIFO.

When sel is directed toward VDC grouping FIFO, after completing VDC syntactic element binaryzation and the grouping data fifo is read After complete, sel is directed toward UAC0 and is grouped FIFO.

Since the step of UAC0~UAC3 is with YAC0~YAC3 is consistent, do not repeat herein.When completion UAC3 syntactic element two After value and after the grouping data fifo read, sel is directed toward VAC0 and is grouped FIFO.

Since the step of VAC0~VAC3 is with YAC0~YAC3 is consistent, do not repeat herein.When completion VAC3 syntactic element two After value and after the grouping data fifo read, all residual block data grouping syntactic elements codings are also just completed.

Above-mentioned requirements of process is illustrated: as shown in fig. 7, since 27 4 × 4 fritters of a macro block are divided into 5 sons Grouping, it is known that multiple 4 × 4 fritters can share the same subgroup, and each subgroup is slow using the same FIFO Storing module, thus in the same subgroup different 4 × 4 fritters cannot binaryzation simultaneously, otherwise the data in FIFO will appear The data of different 4 × 4 fritters overlap phenomenon, to avoid this phenomenon, need using some measures, specifically with YAC0, YAC4, For the sub- residual error grouping 1 of YAC8, YAC12, UAC0, VAC0 composition:

When starting current macro coding, binary conversion treatment first is carried out to YAC0, and all bit streams are written in corresponding FIFO；

At this point, subsequent YAC4, YAC8, YAC12, UAC0, VAC0 not start binary conversion treatment, YAC0 block FIFO is first waited until Data be read after, just start YAC4 binary conversion treatment；

After the completion of YAC4 binaryzation, after the completion of waiting until that the YAC4 data cached in FIFO are read again, restart next The binary conversion treatment of a 4 × 4 fritter, the processing of subsequent 4 × 4 fritter similarly, herein without repeat.

Further, above-mentioned processing method is residual to different sons only for 4 × 4 fritters in same sub- residual error grouping Without processing between differential set.

Further, the above-mentioned processing for the grouping of sub- residual error can't propose the present invention from the point of view of practical application Parallel processing out generates negative effect, and reason is: after having read the YAC0 data in FIFO, select finger sel meeting It is directed toward the corresponding subgroup of YAC1, YAC2, YAC3 to be handled, during this period of time, has had time enough complete for YAC4 At binary conversion treatment, remaining block is also such principle, herein without repeating.

In addition, in each 4 × 4 fritter comprising full zero flag position (coded_block_flag), current pixel whether It whether is the last nonzero coefficient of current 4x4 block for zero flag bit (significant_coeff_flag [i]), current pixel The numerical value coeff_abs_level_ that flag bit (last_significant_coeff_flag [i]), residual absolute value subtract 1 The syntactic elements such as minus_1 [i] need to encode；

Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, all should be considered as described in this specification.

Those of ordinary skill in the art will appreciate that implement the method for the above embodiments be can be with Relevant hardware is instructed to complete by program.The program can be stored in a computer readable storage medium. The program when being executed, includes the steps that described in the above method.The storage medium, comprising: ROM/RAM, magnetic disk, CD Deng.

The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.

Claims

1. a kind of generation method of the binary syntax element of video image frame, comprising the following steps:

Obtain video image frame syntactic element to be encoded, according to syntactic element classification to the syntactic element to be encoded into Row grouping, obtains each group syntactic element group；

Binary conversion treatment is carried out to each institute's syntax elements group simultaneously, obtains multiple syntactic element binaryzation bit streams；

Each institute's syntax elements binaryzation bit stream is cached simultaneously, and according to the bit process of binary arithmetic coding speed Degree is scheduled the syntactic element binaryzation bit stream of all cachings, generates the video figure for meeting binary arithmetic coding sequence As the binary syntax element of frame；

The each group syntactic element group includes macro block (mb) type syntactic element group, macroblock prediction syntactic element group, sub-macroblock residual error volume Code scheme syntactic element group and residual block data syntax element group；

The residual block data syntax element group includes 1 brightness YDC component, 16 brightness YAC components, 1 coloration UDC points Amount, 1 coloration VDC component, 4 coloration UAC components and 4 coloration VAC components；

It is described that the syntactic element to be encoded is grouped according to syntactic element classification, obtain the step of each group syntactic element group It is rapid the following steps are included:

The residual block data syntax element group is grouped, five groups of sub- residual error syntactic element groups are obtained；Wherein, one group of son is residual Poor syntactic element group includes 1 brightness YDC component, 1 coloration UDC component and 1 coloration VDC component；Other four groups of sub- residual errors Syntactic element group respectively includes four brightness YAC components, 1 coloration UAC component and 1 coloration VAC component；

It is described at the same to each institute's syntax elements group carry out binary conversion treatment the step of the following steps are included:

Simultaneously to macro block (mb) type syntactic element group, macroblock prediction syntactic element group, sub-macroblock residuum coding scheme syntactic element group Binary conversion treatment is carried out with five groups of sub- residual error syntactic element groups；

The four brightness YAC component be respectively the first brightness YAC component, the second brightness YAC component, third brightness YAC component, 4th brightness YAC component；

The step of binary conversion treatment is carried out to described one group sub- residual error syntactic element group the following steps are included:

Binary conversion treatment successively is carried out to the brightness YDC component, the coloration UDC component and the coloration VDC component；Preceding After the corresponding syntactic element binaryzation bit stream of one component is scheduled, then carry out the binary conversion treatment of latter component；

The step of binary conversion treatment is carried out to described other four groups sub- residual error syntactic element groups the following steps are included:

For any one group in other the four groups sub- residual error syntactic element groups, successively to the first brightness YAC component, institute State the second brightness YAC component, the third brightness YAC component, the 4th brightness YAC component, the coloration UAC component and institute It states coloration VAC component and carries out binary conversion treatment；After the corresponding syntactic element binaryzation bit stream of previous component is scheduled, then into The binary conversion treatment of row latter component；

It is described to each institute's syntax elements binaryzation bit stream simultaneously cache the step of the following steps are included:

Each institute's syntax elements binaryzation bit stream is cached simultaneously by different cache modules, wherein the caching Module and institute's syntax elements binaryzation bit stream correspond；

The bit process speed according to binary arithmetic coding carries out the syntactic element binaryzation bit stream of all cachings The step of scheduling the following steps are included:

Setting grouping select finger will be described when starting the syntactic element binaryzation bit stream to all cachings and being scheduled Grouping select finger is successively directed toward the cache module of the macro block (mb) type syntactic element group, the macroblock prediction syntactic element group Cache module, the cache module of the sub-macroblock residuum coding scheme syntactic element group and five groups of sub- residual error syntactic element groups it is slow Storing module, the syntactic element binaryzation bit stream in cache module being directed toward to the grouping select finger are read out；

The grouping select finger is successively directed toward to the cache module of five groups of sub- residual error syntactic element groups, grouping selection is referred to Syntactic element binaryzation bit stream the step of being read out in the cache module that needle is directed toward the following steps are included:

Judge whether macro block (mb) type is 16 × 16 block of pixels in frame, if so, the grouping select finger is directed toward described one group The corresponding cache module of sub- residual error syntactic element group, to bright in the corresponding cache module of described one group sub- residual error syntactic element group The syntactic element binaryzation bit stream of degree YDC component is read out, and is judged in other the four groups sub- residual error syntactic element groups The first brightness YAC component whether all be full null component；

If it is not, the grouping select finger is successively then directed toward the corresponding caching mould of described other four groups sub- residual error syntactic element groups Block, to the syntactic element of the first brightness YAC component in the corresponding cache module of described other four groups sub- residual error syntactic element groups Binaryzation bit stream is successively read out, and judges the second brightness YAC points in other the four groups sub- residual error syntactic element groups Whether amount is all full null component；

If it is not, the grouping select finger is successively then directed toward the corresponding caching mould of described other four groups sub- residual error syntactic element groups Block, to the syntactic element of the second brightness YAC component in the corresponding cache module of described other four groups sub- residual error syntactic element groups Binaryzation bit stream is successively read out, and judges third brightness YAC points in other the four groups sub- residual error syntactic element groups Whether amount is all full null component；

If it is not, the grouping select finger is successively then directed toward the corresponding caching mould of described other four groups sub- residual error syntactic element groups Block, to the syntactic element of the third brightness YAC component in the corresponding cache module of described other four groups sub- residual error syntactic element groups Binaryzation bit stream is successively read out, and judges the 4th brightness YAC points in other the four groups sub- residual error syntactic element groups Whether amount is all full null component；

If it is not, the grouping select finger is successively then directed toward the corresponding caching mould of described other four groups sub- residual error syntactic element groups Block, to the syntactic element of the 4th brightness YAC component in the corresponding cache module of described other four groups sub- residual error syntactic element groups Binaryzation bit stream is successively read out, and judges coloration UDC component and coloration in described one group sub- residual error syntactic element group Whether VDC component is all full null component；

If it is not, the grouping select finger is then directed toward the corresponding cache module of one group of sub- residual error syntactic element group, to institute State the syntactic element two of the coloration UDC component and coloration VDC component in the corresponding cache module of one group of sub- residual error syntactic element group Value bit stream is read out, and judges the coloration UAC component and coloration VAC in other the four groups sub- residual error syntactic element groups Whether component is all full null component；

If it is not, the grouping select finger is successively then directed toward the corresponding caching mould of described other four groups sub- residual error syntactic element groups Block, to the coloration UAC component and coloration VAC component in the corresponding cache module of described other four groups sub- residual error syntactic element groups Syntactic element binaryzation bit stream is read out.

2. the generation method of the binary syntax element of video image frame according to claim 1, which is characterized in that by institute The cache module that grouping select finger is successively directed toward five groups of sub- residual error syntactic element groups is stated, the grouping select finger is directed toward The step of syntactic element binaryzation bit stream in cache module is read out the following steps are included:

If macro block (mb) type is not 16 × 16 block of pixels in frame, other four groups sub- residual error syntactic element groups described in the judgement are executed In the first brightness YAC component whether all be full null component the step of；

If the first brightness YAC component in other the four groups sub- residual error syntactic element groups is all full null component, described in execution Judge the second brightness YAC component in other the four groups sub- residual error syntactic element groups whether all as full null component the step of；

If the second brightness YAC component in other the four groups sub- residual error syntactic element groups is all full null component, described in execution Judge third brightness YAC component in other the four groups sub- residual error syntactic element groups whether all as full null component the step of；

If the third brightness YAC component in other the four groups sub- residual error syntactic element groups is all full null component, described in execution Judge the 4th brightness YAC component in other the four groups sub- residual error syntactic element groups whether all as full null component the step of；

If the 4th brightness YAC component in other the four groups sub- residual error syntactic element groups is all full null component, described in execution Judge coloration UDC component in described one group sub- residual error syntactic element group and coloration VDC component whether all for the step of full null component Suddenly；

If the coloration UDC component and coloration VDC component in one group of sub- residual error syntactic element group are all full null component, execute It is described judge described in coloration UAC component in other four groups sub- residual error syntactic element groups and coloration VAC component whether be all complete zero The step of component.

3. the generation method of the binary syntax element of video image frame according to claim 1, which is characterized in that described The step that the syntactic element binaryzation bit stream of all cachings is scheduled according to the bit process speed of binary arithmetic coding It is rapid the following steps are included:

When binaryzation bit number in the syntactic element binaryzation bit stream of caching is greater than 2, to the syntactic element two-value of caching Change bit stream to be scheduled.

4. special according to claim 1 to the generation method of the binary syntax element of video image frame described in 3 any one Sign is:

The macro block (mb) type syntactic element group include 16 × 16 block of pixels in frame brightness CBP, chrominance C BP and prediction mode and The partitioning scheme of inter-pixel block；

The syntactic element that the macroblock prediction syntactic element group is included includes the prediction mode of intra-frame 4 * 4 block of pixels, interframe picture The reference frame index and motion vector difference of plain block；

The syntactic element that the sub-macroblock residuum coding scheme syntactic element group is included includes the brightness of intra-frame 4 * 4 block of pixels CBP and chrominance C BP, the brightness CBP of inter-pixel block and chrominance C BP and current macro quantization parameter residual error.

5. a kind of generation system of the binary syntax element of video image frame characterized by comprising

Grouped element is obtained, for obtaining the syntactic element to be encoded of video image frame, according to syntactic element classification to described Syntactic element to be encoded is grouped, and obtains each group syntactic element group；

Binarization unit obtains multiple syntactic element two-values for carrying out binary conversion treatment to each institute's syntax elements group simultaneously Change bit stream；

Cache unit, for being cached simultaneously to each institute's syntax elements binaryzation bit stream；

Scheduling unit, for the bit process speed according to binary arithmetic coding to the syntactic element binaryzation ratio of all cachings Special stream is scheduled, and generates the binary syntax element for meeting the video image frame of binary arithmetic coding sequence；

The acquisition grouped element is also used to be grouped the residual block data syntax element group, obtains five groups of sub- residual error languages Method element group；Wherein, one group of sub- residual error syntactic element group includes 1 brightness YDC component, 1 coloration UDC component and 1 coloration VDC component；Other four groups sub- residual error syntactic element groups respectively include four brightness YAC components, 1 coloration UAC component and 1 color Spend VAC component；

The binarization unit is also used to residual to macro block (mb) type syntactic element group, macroblock prediction syntactic element group, sub-macroblock simultaneously Poor encoding scheme syntactic element group and five groups of sub- residual error syntactic element groups carry out binary conversion treatment；

The binarization unit is also used to successively to the brightness YDC component, the coloration UDC component and the coloration VDC points Amount carries out binary conversion treatment；After the corresponding syntactic element binaryzation bit stream of previous component is scheduled, then carry out latter component Binary conversion treatment；For any one group in other the four groups sub- residual error syntactic element groups, successively to first brightness YAC component, the second brightness YAC component, the third brightness YAC component, the 4th brightness YAC component, the coloration UAC component and the coloration VAC component carry out binary conversion treatment；In the corresponding syntactic element binaryzation bit stream quilt of previous component After scheduling, then carry out the binary conversion treatment of latter component；

The cache unit includes multiple and different cache module, and different cache modules is to each syntactic element binaryzation bit stream It is cached simultaneously, wherein cache module and syntactic element binaryzation bit stream correspond；

The scheduling unit is also used to be arranged grouping select finger, is starting the syntactic element binaryzation bit stream to all cachings When being scheduled, the grouping select finger is successively directed toward to the cache module, described macro of the macro block (mb) type syntactic element group Block predicts the cache module of syntactic element group, the cache module of the sub-macroblock residuum coding scheme syntactic element group and five groups of sons The cache module of residual error syntactic element group, the syntactic element binaryzation ratio in cache module that the grouping select finger is directed toward Special stream is read out；

The scheduling unit is also used to judge whether macro block (mb) type is 16 × 16 block of pixels in frame, if so, the grouping is selected The corresponding cache module of the sub- residual error syntactic element group of described one group of pointer direction is selected, to described one group sub- residual error syntactic element group pair The syntactic element binaryzation bit stream of brightness YDC component in the cache module answered is read out, and is judged other four groups described Whether the first brightness YAC component in sub- residual error syntactic element group is all full null component；

6. the generation system of the binary syntax element of video image frame according to claim 5, which is characterized in that described Scheduling unit is also used to when macro block (mb) type is not 16 × 16 block of pixels in frame, executes other four groups of sub- residual errors described in the judgement The step of whether the first brightness YAC component in syntactic element group is all full null component；

When the first brightness YAC component in other the four groups sub- residual error syntactic element groups is all full null component, described in execution Judge the second brightness YAC component in other the four groups sub- residual error syntactic element groups whether all as full null component the step of；

When the second brightness YAC component in other the four groups sub- residual error syntactic element groups is all full null component, described in execution Judge third brightness YAC component in other the four groups sub- residual error syntactic element groups whether all as full null component the step of；

When third brightness YAC component in other the four groups sub- residual error syntactic element groups is all full null component, described in execution Judge the 4th brightness YAC component in other the four groups sub- residual error syntactic element groups whether all as full null component the step of；

When the 4th brightness YAC component in other the four groups sub- residual error syntactic element groups is all full null component, described in execution Judge coloration UDC component in described one group sub- residual error syntactic element group and coloration VDC component whether all for the step of full null component Suddenly；

When coloration UDC component and coloration VDC component in described one group sub- residual error syntactic element group are all full null component, execute It is described judge described in coloration UAC component in other four groups sub- residual error syntactic element groups and coloration VAC component whether be all complete zero The step of component.

7. the generation system of the binary syntax element of video image frame according to claim 5, which is characterized in that described When scheduling unit is also used to the binaryzation bit number in the syntactic element binaryzation bit stream of caching greater than 2, to the language of caching Method element binaryzation bit stream is scheduled.

8. special according to the generation system of the binary syntax element of video image frame described in claim 5 to 7 any one Sign is: