CN104137545B - The coding of encoding block flag and the coding/decoding method of video bit stream and device - Google Patents
The coding of encoding block flag and the coding/decoding method of video bit stream and device Download PDFInfo
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Abstract
The invention discloses a kind of method and apparatus of decoding video bit stream.In one embodiment, the above method includes：The first encoding block flag of color component is decoded, above-mentioned first encoding block flag indicates whether the current coded unit of this color component has an at least non-zero transform coefficient (830).The above method further includes：According to the first encoding block flag of color component, four the second encoding block flags are decoded, whether one of four sub-blocks have an at least non-zero transform coefficient (850) in the current coded unit of every one second encoding block flag instruction color component.The decision of the residual error quaternary tree of the current coded unit of color component is the first encoding block flag (870) based on color component if the first encoding block flag in the presence of four the second encoding block flags based on color component and four the second encoding block flags (860).In another embodiment, the above method includes：Decoding and the relevant encoding block flag of converter unit, and the residual error quaternary tree of converter unit is determined based on encoding block flag, the decision of the residual error quaternary tree of converter unit wherein based on encoding block flag is identical for luminance component and chromatic component, and encoding block flag is reduced from video bit stream.
Description
Cross reference to related applications
This application claims the priority applied as follows：On January 19th, 2012 is submitting, Application No. PCT/CN2012/
The PCT Patent Application of the 070612nd, entitled " Methods and Apparatuses of CBF Coding in HEVC ".
This merges the full content with reference to above-mentioned application case.
Technical field
The present invention is related to Video coding, and particularly, the present invention is related to efficient video coding (High-
Efficiency Video coding, HEVC) in coding unit (coding unit, CU) and converter unit (transform
Unit, TU) relevant encoding block flag (coded block flag, cbf) grammer (syntax) coding method and device with
And the coding/decoding method and device of video bit stream.
Background technology
HEVC be by the Video Coding Experts Group from ITU-T seminar into Video coding joint group (Joint
Collaborative Team on Video Coding, hereinafter referred to as JCT-VC) exploitation a kind of advanced Video coding system
System.In HEVC beta versions 5.0 (HM-5.0), interframe encode (inter-coded) and intraframe coding (intra-coded)
Residual error is encoded using block-based transition coding mode.Above-mentioned piece (being known as converter unit) is to utilize quad-tree structure from root
Block (root converter unit) is split.Above-mentioned Quadtree Partition can be applied recursively until generate leaf block (leaf block) or
Person's smallest blocks.Afterwards, two-dimensional transform is applied to each converter unit.Each converter unit (TU) may be logically divided into four sub- TU,
That is leaf TU., it is necessary to transmit a syntactic element for being called cbf (encoding block flag) whether to indicate this TU for every TU
With non-zero transform coefficient, wherein " 1 " represents that, there are at least one non-zero transform coefficient, " 0 " then represents that there is no non-zero transforms
Coefficient.
In HM-5.0, for luminance component, the leaf TU that cbf can only be directed to residual error quaternary tree is transmitted
(signaled).And for chromatic component, cbf then can be transmitted for root TU and leaf TU, however, cbf is also only in size
It is transmitted in TU less than or equal to maximum chrominance TU sizes.Fig. 1 to Fig. 3 shows that cbf transmits the example of (signalling).
In Fig. 1, block 110 shows the residual error Quadtree Partition of TU, wherein using Quadtree Partition, root TU is divided into sub- TU (TU0
~TU6).Block 120 shows corresponding cbf bits, and wherein TU1, TU3, TU5 and TU6 has a non-zero transform coefficient, and TU0, TU2
Do not have non-zero transform coefficient then with TU4.If this TU transmits for brightness TU, cbf bit just for leaf TU.Fig. 2A is for bright
The cbf of degree TU transmits the example of (cbf codings), wherein four groups of bits " 0 ", " 1 ", " 0101 " and " 1 " correspond respectively to root
The cbf bits of four leaf TU of TU210.Above-mentioned cbf bits are sequentially transmitted according to P-SCAN (raster-scan), i.e.,
According to upper left TU, upper right TU, lower-left TU, bottom right TU order.For the leaf TU of lower-left, 4 leaves are further divided into
TU.In P-SCAN order, the cbf bits of this leaf TU are " 0101 ".Correspondingly, Fig. 2A shows four of cbf bits 220
Grouping.Fig. 2 B show transmits example for the cbf of colourity TU, and wherein cbf bits can be directed to root TU and leaf TU and transmit.Root
TU230 is divided into four leaf TU, and lower-left leaf TU is further divided into four leaf TU.Therefore, corresponding to three layers of TU
Grade can there are three the cbf bits of level.For root TU (that is, depth=0), cbf bits " 1 " (are represented) quilt by number 240
It transmits.For four leaf TU of root TU, according to P-SCAN order, cbf bits be respectively " 0 ", " 1 ", " 1 " and " 1 " (by
Number 250 represents).For the leaf TU of lower-left, four leaf TU are further divided into, it is above-mentioned according to P-SCAN order
Four leaf TU correspond respectively to cbf bits " 0 ", " 1 ", " 0 " and " 1 " (being represented by number 260).As shown in Figure 2 A and 2 B, though
Right brightness TU and colourity TU is using identical RQT (residual error quaternary tree), but transmitting for cbf is different.Fig. 2 B institutes demonstration example is fitted
It is less than or equal to the situation of maximum chrominance TU sizes for root block size.For example, it is assumed that maximum chrominance TU sizes for 16 ×
16 and minimal color TU sizes are 4 × 4, then the size of root TU230 is 16 × 16, the size of each leaf TU in each lower-left leaf TU
For 4 × 4.When the size of colourity leaf TU is more than maximum chrominance TU sizes, for example 32 × 32, then the level 32 × 32 will not be into
Row cbf is transmitted.
In order to reduce the quantity of cbf bits, a kind of estimating method can be applied and brightness and colourity TU, in the method, root
The cbf of the 4th leaf TU of TU can be inferred to using the cbf of other TU.So as to be transmitted without the cbf to the 4th leaf TU.
For brightness TU, the cbf of the 4th leaf TU can be by the cbf's and relevant TU of three previous leaf TU
Cbf is inferred to.Block 310 in Fig. 3 shows the example that the cbf of the 4th leaf TU can be pushed off out.It is represented by bold box 312
Lower-left TU be divided into four leaf TU, wherein the cbf of the 4th leaf TU be 1.Since TU312 is divided into four leaf TU,
There are at least one non-zero transform coefficients in four leaf TU.When the cbf of three first frontal lobe TU is 0 (according to P-SCAN
Sequentially), the cbf of the last one leaf TU (that is, the 4th leaf TU) necessarily 1.Therefore, in this situation, the cbf of the 4th leaf TU can quilt
It is inferred to.For simplicity, the cbf of leaf TU is also referred to as leaf cbf.
It is for colourity TU, then different for the progress cbf transmission of all residual error quaternary tree levels due to needing.It is right
In with for the relevant four leaf TU of each TU, the cbf of root TU can be transmitted.If the cbf of TU (block 312 in Fig. 3) is 1,
Then necessarily there is at least one non-zero leaf TU in four leaf TU.Therefore, if the cbf of first three leaf TU is 0, the last one leaf TU
The cbf of (shown in circle) necessarily 1.In this situation, the last one cbf can be pushed off out without being transmitted.Further
For, in the frame of chromatic component and interframe encode TU can all apply above-mentioned deduction mechanism.
In HEVC, there are the root residual error flags (root residual flag) that one is used for interframe encode CU.When residual
When poor flag is false (false), then whole cbf of Y, U, V component need not be transmitted.As the TU that residual error flag is true and current CU
Depth be 0 when, if colourity cbf all be 0 when if deducibility brightness cbf be 1.Therefore, if the cbf of U (block 320) and V (block 330) all
It is 0, then cbfs of the brightness TU when depth is 0 can be inferred to be 1, as shown in Figure 3.
In HM-5.0, the maximum TU sizes of chromatic component and luminance component are respectively 16 × 16 and 32 × 32.However, color
The maximum CU sizes for spending component are 32 × 32.Therefore, maximum CU sizes and maximum TU are differed.Furthermore, it is understood that in HM-
In 5.0, the TU that colourity cbf is less than or equal to maximum TU sizes only for size is transmitted.For example, when CU sizes for 64 ×
64, i.e. chrominance C U sizes are 32 × 32, and maximum TU sizes then correspond to 16 × 16.Therefore, four root cbf will be directed to 32 ×
Four 16 × 16 colourity TU in 32CU and transmit.In this situation, it can also be transmitted even if four cbf are 0, cbf, such as schemed
Shown in 4, wherein the size of chrominance C U410 is 32 × 32.
As described above, the cbf method of signalling for brightness TU and colourity TU is different.Therefore, it is necessary to a kind of unifications
Cbf method of signalling is to simplify the above process.In addition, there are some redundancies in existing cbf method of signalling, therefore be also required to further
Promote the efficiency of existing cbf method of signalling.
The content of the invention
In view of this, following technical scheme is provided：
The embodiment of the present invention provides a kind of coding/decoding method of video bit stream, comprising：It is received from media or processor
The video bit stream；The first encoding block flag of color component is decoded, wherein the first encoding block flag indicates the color component
Current coded unit whether there is an at least non-zero transform coefficient, and the first encoding block flag is from the video bit stream
Reduction；If the current coded unit has an at least non-zero transform coefficient, four the second encoding blocks of the color component are decoded
Flag, wherein each second encoding block flag indicates that one of four sub-blocks in the current coded unit of the color component are
It is no that there is an at least non-zero transform coefficient, and this four the second encoding block flags are reduced from the video bit stream；And
Based on the first encoding block flag and this four the second encoding block flags, determine the color component the current coded unit it is residual
Poor quad-tree structure；Wherein, the size of the current coded unit of the color component is more than the maximum conversion list of the color component
Elemental size.
The embodiment of the present invention separately provides a kind of coding/decoding method of video bit stream, comprising：It is connect from media or processor
Receive the video bit stream；Decoding and the relevant encoding block flag of converter unit, the wherein encoding block flag is from the video bits
It is reduced in stream；And the residual error quaternary tree of the converter unit is determined based on the encoding block flag, wherein for luminance component and
Transmitting for the encoding block flag of chromatic component is identical.
The embodiment of the present invention separately provides a kind of coding method of encoding block flag, comprising：Determine the current of color component
The residual error of coding unit；Determine the first encoding block flag of the color component, wherein the first encoding block flag indicates the color
Whether the current coded unit of component has an at least non-zero transform coefficient；If the current coded unit has an at least non-zero
Transformation coefficient determines four the second encoding block flags of the color component, wherein each second encoding block flag indicates the color
Whether one of four sub-blocks in the current coded unit of color component have an at least non-zero transform coefficient；And by the color
The first encoding block flag of component and this four the second encoding block flags are integrated into the video bit stream, wherein, the color
The size of the current coded unit of component is more than the maximum converter unit size of the color component.
The embodiment of the present invention separately provides a kind of coding method of encoding block flag, comprising：It is connect from media or processor
Receive converter unit；It determines and the relevant residual error quaternary tree of the converter unit；And determine the residual error for corresponding to the converter unit
One or more encoding block flags of quaternary tree, wherein being phase for transmitting for this of luminance component and chromatic component encoding block flag
With.
The embodiment of the present invention separately provides a kind of decoding apparatus of video bit stream, comprising：It is received from media or processor
The module of the video bit stream；The module of the first encoding block flag of color component is decoded, wherein the first encoding block flag refers to
Whether show the current coded unit of the color component has an at least non-zero transform coefficient, and first coding of the color component
Block flag is reduced from the video bit stream；If the current coded unit has an at least non-zero transform coefficient, decoding should
The module of four the second encoding block flags of color component, wherein each second encoding block flag indicates being somebody's turn to do for the color component
Whether one of four sub-blocks in current coded unit have an at least non-zero transform coefficient, and this of the color component is the
Two encoding block flags are reduced from the video bit stream；And the first encoding block flag based on the color component and should
Four the second encoding block flags determine the module of the residual error quad-tree structure of the current coded unit of the color component；Wherein,
The size of the current coded unit of the color component is more than the maximum converter unit size of the color component.
The embodiment of the present invention separately provides a kind of code device of encoding block flag, comprising：Determine the current of color component
The module of the residual error of coding unit；Determine the module of the first encoding block flag of the color component, wherein the first encoding block flag
Mark indicates whether the current coded unit has an at least non-zero transform coefficient；If the current coded unit tool of the color component
Have an at least non-zero transform coefficient, determine the module of four the second encoding block flags of the color component, wherein it is each this second
Encoding block flag indicates whether one of four sub-blocks in the current coded unit of the color component become with an at least non-zero
Change coefficient；And the first encoding block flag of the color component and this four the second encoding block flags are integrated into the video ratio
Module in spy's stream, wherein, the size of the current coded unit of the color component is single more than the maximum conversion of the color component
Elemental size.
The process described above and device can simplify the method for signalling and raising efficiency of encoding block flag.
Description of the drawings
Fig. 1 is the residual error quad-tree structure of leaf transformation unit and the schematic diagram of encoding block flag example.
Fig. 2A according to HM-5.0, for luminance transformation unit encoding block flag method of signalling example schematic diagram.
Fig. 2 B according to HM-5.0, for chromaticity transformation unit encoding block flag method of signalling example schematic diagram.
Fig. 3 is that the encoding block flag of luminance transformation unit and chromaticity transformation unit based on deduction transmits the signal of example
Figure.
Fig. 4 is to transmit showing for example for the encoding block flag of the encoding block flag of four 16 × 16 colourity root converter units
It is intended to.
Fig. 5 infers showing for mechanism example according to the embodiment of the present invention, for the encoding block flag of interframe encode unit
It is intended to.
Fig. 6 A and 6B is transmitted according to the embodiment of the present invention, the encoding block flag of chromatic component in coding unit level
The schematic diagram of example.
Fig. 7 is the schematic diagram of the exemplary flow for the encoder for integrating the embodiment of the present invention.
Fig. 8 is the schematic diagram of the exemplary flow for the decoder for integrating the embodiment of the present invention.
Fig. 9 is the schematic diagram of the exemplary flow for the encoder for integrating another embodiment of the present invention.
Figure 10 is the schematic diagram of the exemplary flow for the decoder for integrating another embodiment of the present invention.
Specific embodiment
In one embodiment of the invention, by the way that colourity cbf coding methods are extended to brightness cbf, brightness and colourity
The method of signalling of cbf is able to unification.Therefore, brightness and colourity cbf can all be transmitted for each level of residual error quaternary tree.Change sentence
It talks about, cbf, which is transmitted, can be directed to root TU and leaf TU progress.In this situation, also obtained for the estimating method of brightness and chromatic component
To unification.Therefore, brightness TU and colourity TU uses identical estimating method.In other words, if the cbf of first three leaf TU is 0,
Then the cbf of the last one leaf TU is necessarily 1.
In another embodiment, it is applied to unified method of signalling for the residual error flag estimating method of interframe CU.Cause
This, when residual error flag is true and the cbf of colourity TU is all 0, the cbf of top layer root brightness TU is inferred to be 1 but regardless of this top layer
Whether root TU can be further segmented.Furthermore, it is understood that above-mentioned can also be answered for the residual error flag estimating method of interframe CU
With other TU depth extremely in addition to depth 0.In other words, when TU is further segmented and colourity cbf is 0, brightness
The cbf of TU can be inferred to be 1.It is 1 and is all for the cbf of colourity root TU (U520 and V530) as shown in figure 5, works as residual error flag
When 0, the cbf of brightness root TU510 can be inferred to be 1.
It can also unify furthermore, it is understood that the context of colourity cbf forms (context formation) with colourity cbf phases,
So that based on context adaptive binary arithmetic coding (context-based adaptive arithmetic coding,
CABAC the context formation of cbf codings) both depends on TU depth for brightness and chromatic component.In order to reduce cbf flags
The complexity of target entropy coding, the quantity of context can be reduced.In addition, bypass coding mode (bypass coding mode)
It can also be used for the cbf codings based on CABAC.
In another embodiment, root cbf is always transmitted in CU levels and is ignored maximum TU sizes.Therefore, in every CU
It is constantly present root cbf.Fig. 6 A and 6B are the cbf cataloged procedures when chrominance C U sizes are 32 × 32 and maximum TU sizes are 16 × 16
Example.In fig. 6, chrominance C U corresponds to 32 × 32 block, is more than maximum chrominance TU sizes (i.e. 16 × 16).Due to
The relevant all colourity TU of CU (represent) that then the root cbf for chrominance C U is 0 without non-zero transform coefficient with 0.According to this hair
Bright embodiment, the root cbf in every CU are always transmitted, therefore 0 can be transmitted for CU, are sent out without other cbf
Letter.Fig. 6 B show another example, and wherein lower-left TU includes at least one non-zero transform coefficient.In this situation, 1 sent with
For root chrominance C U, and other cbf bits " 0010 " are also transmitted to represent which TU includes non-zero transform coefficient.Base
In the coded system of HM-5.0, the maximum TU sizes of brightness and chromatic component are known.The information of maximum TU sizes also may be used
It is transmitted in bit stream, such as the sequence-level (for example, SPS) in bit stream.
In another embodiment, by the way that brightness cbf coding methods are extended to colourity cbf, brightness and colourity cbf's transmits
Method is able to unification.So as to which brightness and colourity cbf are transmitted only for leaf TU.
Above-described cbf method of signalling can be applied in video encoder, equally can also be applied to video decoding
In device.Fig. 7 is the schematic diagram of the exemplary flow for the encoder for integrating the embodiment of the present invention.In step 720, current CU is determined
Residual error, wherein the size of current CU be more than maximum TU sizes.In step 720, the first cbf of color component is determined, first
Cbf indicates whether current CU (depth=0) has an at least non-zero transform coefficient.As indicated by step 730, according to the first cbf's
As a result different processing paths may be selected.If the current CU of color component has an at least non-zero transform coefficient, in step 740
Middle four the 2nd cbf for determining color component, wherein every one second cbf indicates four sub-blocks of the color component in current CU
Whether one of (depth=1) has an at least non-zero transform coefficient.In this situation, as shown in step 750, the first cbf and four
A 2nd cbf can be integrated into video bit stream.If current CU does not have non-zero transform coefficient, as shown in step 760,
Only the first cbf is integrated into video bit stream.Being transmitted by the cbf that cbf is integrated into video bit stream will allow to decode
Device reduces residual error quad-tree structure and performs corresponding decoding program.In some embodiments, if color component it is at least one
Sub-block has an at least non-zero transform coefficient, and this sub-block and not up to minimum TU sizes of color component, then becomes with non-zero
The sub-block for changing coefficient is further divided into 4 leaf blocks (depth=2).Come for each sub-block with non-zero transform coefficient
It says, four the 3rd cbf are determined, wherein whether one of four leaf blocks of every one the 3rd cbf instruction color components have at least one
Non-zero transform coefficient.Four the 3rd cbf of above-mentioned color component are also integrated into video bit stream.Above-mentioned sub-block and leaf block can be with
It is the root TU and leaf TU in current CU.Above-mentioned color component can be brightness or chromatic component.
Fig. 8 is the schematic diagram of the exemplary flow for the decoder for integrating the embodiment of the present invention.In step 810, from media
(media) or processor (processor) receives video bit stream.Above-mentioned video bit stream can be stored in media, such as
It stores in media (hard disk, CD, flash card) or computer storage (RAM, PROM, DRAM or flash memory).Video bit stream
It can be received and/or handled by processor.For example, in broadcast environment, channel receiver (channel receiver) can
The signal of modulation, demodulation and demultiplexing are received to reduce required bit stream.In this situation, video bit stream is received from processor
(that is, channel receiver).In step 830, the first cbf of color component is decoded, the first cbf indicates the current of this color component
Whether CU (depth=0) has an at least non-zero transform coefficient.As illustrated in step 840, may be selected according to decoding result different
Decoding paths.If the first cbf of color component is not 0, four the 2nd cbf of color component are decoded in step 850, wherein
Every one second cbf indicates whether one of four sub-blocks (depth=1) of color component in current CU become with an at least non-zero
Change coefficient.In step 860, the residual error quaternary tree knot of the current CU of color component is determined based on the first cbf and four the 2nd cbf
Structure.If four the 2nd cbf of color component are 0, as shown in step 870, the first cbf is based only upon to determine color component
The residual error quad-tree structure of current CU.In some embodiments, if a sub-block of the color component in depth=1 has at least one
Non-zero transform coefficient, and the size of this sub-block is more than the minimum TU sizes of color component, then decodes four the 3rd of color component
cbf.Wherein whether one of four leaf blocks of every one the 3rd cbf instruction color components of color component have an at least non-zero transform
Coefficient.At this point, the residual error quad-tree structure of the current CU of color component is based on above-mentioned first cbf, the 2nd cbf and the 3rd
Cbf is determined.Above-mentioned sub-block and leaf block can be root TU and leaf TU in current CU.Above-mentioned color component can be brightness or color
Spend component.
Fig. 9 is the schematic diagram of the exemplary flow for the encoder for integrating another embodiment of the present invention.In step 910, from
Media or processor receive TU.Then determined and the relevant RQT of this TU (residual error quaternary tree) in step 920.In step 930
In, one or more cbf for corresponding to the RQT of this TU are determined, wherein being phase for transmitting for the cbf of luminance component and chromatic component
With.
Figure 10 is the schematic diagram of the exemplary flow for the decoder for integrating another embodiment of the present invention.In step 1010,
Video bit stream is received from media or processor.In step 1020, decision and the relevant cbf of TU, wherein this cbf is from video
It is reduced in bit stream.In step 1030, based on above-mentioned cbf decisions and the relevant residual error quaternary trees of TU, wherein for brightness
Transmitting for the cbf of component and chromatic component is identical.
Above-described flow is used for the purpose of description for incorporating the encoder and decoder of the embodiment of the present invention
The example that cbf is transmitted.Without departing from the spirit of the invention, those skilled in the art can change each step, to upper
Step rearrangement is stated, split a step or integrates multiple steps to realize the present invention.
Above description is for the particular implementation and its demand more than enabling those skilled in the art to hereinafter
To realize the present invention.However, those skilled in the art should can carry out it various modifications and modification, and the present invention's is substantially smart
God can also be applied in other embodiment.Therefore, the present invention is not limited with the specific embodiment, and should be to meet this hair
Bright objective and the most wide scope of new feature are boundary.In foregoing detailed description, it is for the ease of right to illustrate various specific details
The present invention has comprehensive understanding, however, it should be understood that the present invention can be not limit these specific thin
Implement in the case of some or all in section.
It is above-mentioned according to an embodiment of the invention can with different hardware, software code, or both combination implement.Citing
For, an embodiment according to the invention can be the electricity for implementing the method, being integrated into video compress chip
Road or the program code being integrated into video compression software.Another embodiment according to the invention can also be digital letter
Program code performed on number processor (Digital Signal Processor, DSP), for implementing the method.This
Invention can be also included by computer processor, DSP, microprocessor or field programmable gate array (Field Programmable
Gate Array, FPGA) perform a series of functions.According to the present invention, certain party of the embodiment of the present invention is defined by performing
The machine-readable software code or firmware code of method, these processors can be arranged to perform specific task.The software generation
Code or firmware code can mention different-format/pattern to develop by different programming languages.The software code also may conform to not
Same target platform.However, perform software with corresponding task of the invention, with different code form, pattern and language
The code that code and other modes are formed all should be within the scope of the present invention.
On the premise of the spirit and essential characteristic of the present invention is not departed from, the present invention also can be with other particular forms come real
It applies.Embodiment described above is of the invention just for the sake of illustrating, and the limitation of non-invention.The scope of the present invention is when appended
Subject to claim, all equivalent changes and modifications done according to the claims in the present invention should all belong to covering scope of the invention.
Claims (25)
1. a kind of coding/decoding method of video bit stream, comprising：
The video bit stream is received from media or processor；
The first encoding block flag of color component is decoded, wherein the first encoding block flag indicates the present encoding of the color component
Whether unit has an at least non-zero transform coefficient, and the first encoding block flag is reduced from the video bit stream,
In the first encoding block flag include root encoding block flag；
If the current coded unit has an at least non-zero transform coefficient, four the second encoding block flags of the color component are decoded
Mark, wherein whether each second encoding block flag indicates one of four sub-blocks in the current coded unit of the color component
With an at least non-zero transform coefficient, and this four the second encoding block flags are reduced from the video bit stream, wherein should
Second encoding block flag includes leaf encoding block flag；And
Based on the first encoding block flag and this four the second encoding block flags, the current coded unit of the color component is determined
Residual error quad-tree structure；
Wherein, the size of the current coded unit of the color component is more than the maximum converter unit size of the color component；With
In this of luminance component and chromatic component the first encoding block flag transmit and the second encoding block flag transmit it is identical.
2. the coding/decoding method of video bit stream as described in claim 1, which is characterized in that, should for the luminance component
The maximum converter unit size of color component is 32 × 32 and for the chromatic component, the color component this most
Big converter unit size is 16 × 16.
3. the coding/decoding method of video bit stream as described in claim 1, which is characterized in that the maximum conversion of the color component
Unit size is transmitted in sequence-level.
4. the coding/decoding method of video bit stream as described in claim 1, further includes：
If an at least sub-block has an at least non-zero transform coefficient in four sub-blocks, and has an at least non-zero transform coefficient
The size of an at least sub-block is more than the minimum converter unit size of the color component, and decode the color component multiple three compile
Code block flag, wherein each 3rd encoding block flag indicates a leaf of the color component of next depth of four sub-blocks
Whether block has an at least non-zero transform coefficient, and the plurality of 3rd encoding block flag is reduced from the video bit stream；
And
It is based further on the plurality of 3rd encoding block flag and determines that the residual error four of the current coded unit of the color component is pitched
Tree construction.
5. the coding/decoding method of video bit stream as described in claim 1, further includes：
If the current coded unit does not have non-zero transform coefficient, being somebody's turn to do for the color component is determined based on the first encoding block flag
The residual error quad-tree structure of current coded unit.
6. a kind of coding/decoding method of video bit stream, comprising：
The video bit stream is received from media or processor；
Decoding and the relevant encoding block flag of converter unit, wherein the encoding block flag are reduced from the video bit stream；
And
The residual error quaternary tree of the converter unit is determined based on the encoding block flag, wherein for this of luminance component and chromatic component
Transmitting for encoding block flag is identical.
7. the coding/decoding method of video bit stream as claimed in claim 6, which is characterized in that the encoding block flag converts single in root
Member and leaf transformation unit level transmit.
8. the coding/decoding method of video bit stream as claimed in claim 6, which is characterized in that the encoding block flag is in leaf transformation list
First level transmits, and the encoding block flag is not transmitted in root converter unit level.
9. the coding/decoding method of video bit stream as claimed in claim 6, which is characterized in that the encoding block flag is in coding unit
The block size that transmits but regardless of the coding unit of root layer grade whether be more than maximum converter unit size.
10. the coding/decoding method of video bit stream as claimed in claim 6, which is characterized in that the encoding block flag is using upper
Hereafter adaptive binary arithmetic coding is encoded, wherein the context model of the context adaptive binary arithmetic coding
Depth depending on the residual error quaternary tree.
11. the coding/decoding method of video bit stream as claimed in claim 10, which is characterized in that the context model is simplified,
And the context adaptive binary arithmetic coding includes bypass mode.
12. the coding/decoding method of video bit stream as claimed in claim 6, which is characterized in that the encoding block flag is to utilize to push away
Break what is determined.
13. a kind of coding method of encoding block flag, comprising：
Determine the residual error of the current coded unit of color component；
Determine the first encoding block flag of the color component, wherein the first encoding block flag indicate the color component this is current
Whether coding unit has an at least non-zero transform coefficient, which includes root encoding block flag；
If the current coded unit has an at least non-zero transform coefficient, four the second encoding block flags of the color component are determined
Mark, wherein whether each second encoding block flag indicates one of four sub-blocks in the current coded unit of the color component
With an at least non-zero transform coefficient, which includes leaf encoding block flag；And
The first encoding block flag of the color component and this four the second encoding block flags are integrated into video bit stream,
Wherein, the size of the current coded unit of the color component is more than the maximum converter unit size of the color component；With
In this of luminance component and chromatic component the first encoding block flag transmit and the second encoding block flag transmit it is identical.
14. the coding method of encoding block flag as claimed in claim 13, which is characterized in that for the luminance component,
The maximum converter unit size of the color component is 32 × 32 and for the chromatic component, the color component should
Maximum converter unit size is 16 × 16.
15. the coding method of encoding block flag as claimed in claim 13, which is characterized in that the maximum of the color component becomes
It changes unit size and is integrated in sequence-level.
16. the coding method of encoding block flag as claimed in claim 13, further includes：
If an at least sub-block has an at least non-zero transform coefficient in four sub-blocks, and has an at least non-zero transform coefficient
The size of an at least sub-block is more than the minimum converter unit size of the color component, determines that multiple the three of the color component compile
Code block flag, wherein each 3rd encoding block flag indicates a leaf of the color component of next depth of four sub-blocks
Whether block has an at least non-zero transform coefficient；And
By the first encoding block flag, this four the second encoding block flags and the plurality of 3rd encoding block flag of the color component
Mark is integrated into the video bit stream.
17. the coding method of encoding block flag as claimed in claim 13, further includes：
If the current coded unit does not have non-zero transform coefficient, the first encoding block flag of the color component is integrated into this
In video bit stream.
18. a kind of coding method of encoding block flag, comprising：
Converter unit is received from media or processor；
It determines and the relevant residual error quaternary tree of the converter unit；And
Determine one or more encoding block flags of the residual error quaternary tree corresponding to the converter unit, wherein for luminance component and
Transmitting for the encoding block flag of chromatic component is identical.
19. the coding method of encoding block flag as claimed in claim 18, which is characterized in that the encoding block flag is converted in root
Unit and leaf transformation unit level transmit.
20. the coding method of encoding block flag as claimed in claim 18, which is characterized in that the encoding block flag is in leaf transformation
Unit level transmits, and the encoding block flag is not transmitted in root converter unit level.
21. the coding method of encoding block flag as claimed in claim 18, which is characterized in that the encoding block flag is single in coding
Whether the root layer grade of member transmits the block size but regardless of the coding unit more than maximum converter unit size.
22. a kind of decoding apparatus of video bit stream, comprising：
The module of the video bit stream is received from media or processor；
The module of the first encoding block flag of color component is decoded, wherein the first encoding block flag indicates working as the color component
Whether preceding coding unit has an at least non-zero transform coefficient, and the first encoding block flag of the color component is from the video
It is reduced in bit stream, wherein the first encoding block flag includes root encoding block flag；
If the current coded unit has an at least non-zero transform coefficient, four the second encoding block flags of the color component are decoded
Module, wherein each second encoding block flag indicates one of four sub-blocks in the current coded unit of the color component
Whether there is an at least non-zero transform coefficient, and this four the second encoding block flags of the color component are from the video bit stream
Middle reduction, wherein the second encoding block flag includes leaf encoding block flag；And
The first encoding block flag and this four the second encoding block flags based on the color component determine being somebody's turn to do for the color component
The module of the residual error quad-tree structure of current coded unit；
Wherein, the size of the current coded unit of the color component is more than the maximum converter unit size of the color component；With
In this of luminance component and chromatic component the first encoding block flag transmit and the second encoding block flag transmit it is identical.
23. the decoding apparatus of video bit stream as claimed in claim 22, further includes：
If the current coded unit does not have non-zero transform coefficient, being somebody's turn to do for the color component is determined based on the first encoding block flag
The module of the residual error quad-tree structure of current coded unit.
24. a kind of code device of encoding block flag, comprising：
Determine the module of the residual error of the current coded unit of color component；
Determine the module of the first encoding block flag of the color component, wherein the first encoding block flag indicates the present encoding list
Whether member has an at least non-zero transform coefficient, which includes root encoding block flag；
If the current coded unit of the color component has an at least non-zero transform coefficient, four of the color component the are determined
The module of two encoding block flags, wherein each second encoding block flag is indicated in the current coded unit of the color component
Whether one of four sub-blocks have an at least non-zero transform coefficient, which includes leaf encoding block flag；And
The first encoding block flag of the color component and this four the second encoding block flags are integrated into video bit stream
Module,
Wherein, the size of the current coded unit of the color component is more than the maximum converter unit size of the color component；With
In this of luminance component and chromatic component the first encoding block flag transmit and the second encoding block flag transmit it is identical.
25. the code device of encoding block flag as claimed in claim 24, further includes：
If the current coded unit of the color component does not have non-zero transform coefficient, by first encoding block of the color component
Flag is integrated into the module in the video bit stream.
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| CN201810299233.4A CN108449602A (en) | 2012-01-19 | 2013-01-07 | The coding of encoding block flag and the coding/decoding method of video bit stream and device |
| CN201380006152.6A CN104137545B (en) | 2012-01-19 | 2013-01-07 | The coding of encoding block flag and the coding/decoding method of video bit stream and device |
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| PCT/CN2012/070612 WO2013107027A1 (en) | 2012-01-19 | 2012-01-19 | Methods and apparatuses of cbf coding in hevc |
| CNPCT/CN2012/070612 | 2012-01-19 | ||
| CN201380006152.6A CN104137545B (en) | 2012-01-19 | 2013-01-07 | The coding of encoding block flag and the coding/decoding method of video bit stream and device |
| PCT/CN2013/070160 WO2013107309A1 (en) | 2012-01-19 | 2013-01-07 | Method and apparatus for coded block flag coding in high efficiency video coding |
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| WO2019141012A1 (en) * | 2018-01-18 | 2019-07-25 | Mediatek Inc. | Video processing methods and apparatuses for processing video data coded in large size coding units |
| CN116600141A (en) | 2018-03-27 | 2023-08-15 | 株式会社Kt | Method for decoding or encoding image and method for transmitting image data |
| WO2019234604A1 (en) | 2018-06-05 | 2019-12-12 | Beijing Bytedance Network Technology Co., Ltd. | Extended quad-tree with asymmetric sub-blocks |
| CN113519164A (en) * | 2019-03-02 | 2021-10-19 | 北京字节跳动网络技术有限公司 | Limitation of the segmentation structure |
| CN111372082B (en) * | 2019-03-27 | 2022-06-03 | 北京达佳互联信息技术有限公司 | Coding and decoding method and device for coding block flag CBF in video coding |
| WO2020248954A1 (en) * | 2019-06-09 | 2020-12-17 | Beijing Bytedance Network Technology Co., Ltd. | Significant coefficient signaling in video coding |
| KR20220058889A (en) | 2019-09-14 | 2022-05-10 | 바이트댄스 아이엔씨 | Chroma quantization parameters in video coding |
| CN114556924B (en) * | 2019-10-14 | 2024-01-26 | 字节跳动有限公司 | Method, device and medium for joint coding and decoding and filtering of chroma residual in video processing |
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