CN110213581A - A kind of coding method skipped based on block partition mode, device and storage medium - Google Patents
A kind of coding method skipped based on block partition mode, device and storage medium Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/119—Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/12—Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264
- H04N19/122—Selection of transform size, e.g. 8x8 or 2x4x8 DCT; Selection of sub-band transforms of varying structure or type
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/157—Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter
- H04N19/159—Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
- H04N19/176—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
Abstract
The invention discloses a kind of coding method skipped based on block partition mode, device and storage medium, methods to include, and obtains block to be encoded, the left encoding block of block to be encoded and the top encoding block of block to be encoded；When left encoding block is vertical class with top encoding block, then skip all horizontal class Fractionation regimens, block to be encoded is subjected to pre-segmentation by vertical class Fractionation regimen, if left encoding block and top encoding block are horizontal class, all vertical class Fractionation regimens are then skipped, block to be encoded is subjected to pre-segmentation by horizontal class Fractionation regimen；Calculate the cost value of each encoding block to be processed and the cost value of pre-segmentation encoding block to be processed, the segmentation result by the smallest partitioning scheme of cost value, as target code block；Encoding block is treated according to the partitioning scheme of target code block and optimal intra prediction mode to be encoded.By implementing the embodiment of the present invention, it can be improved coding rate, reduce the scramble time.
Description
Technical field
The present invention relates to technical field of video coding more particularly to a kind of coding method skipped based on block partition mode,
Device and storage medium.
Background technique
Since uncompressed original video data amount is not able to satisfy practical application, video coding technique is produced.
To enable the technology to use in every field intercommunication, international organization establishes corresponding international standard to Video coding, and right
Video coding technique is constantly explored and is developed.So far, H.266/VVC the video encoding standard of latest generation is.
H.266/VVC setting objectives for standard is that H.265/HEVC its compression performance ratio previous generation standard improves at least
30%, the support of resolution ratio is promoted to 16K from 4K, and is able to satisfy and encodes to 360 ° of videos.For these demands, VVC
On the basis of continuing to use hybrid encoding frame, using many new technologies.For example, not repartitioning coding unit (Coding
Unit, CU), predicting unit (Prediction Unit, PU), converter unit (Transform Unit, TU), use mixing
The division mode of tree, only remains CU；The luminance component in I frame is allowed independently to be divided with chromatic component；Increase frame interior angle
Prediction mode quantity is spent to 67 kinds；Inter-prediction increases Affine mode；Introduce adaptive motion vector precision techniques；
Using multi-core adaptive converter technique etc..While these new technologies introduce, huge computation complexity is also brought, greatly
The scramble time is increased greatly.
Summary of the invention
The embodiment of the present invention provides a kind of coding method skipped based on block partition mode, device and storage medium, can contract
The short scramble time improves coding rate.
One embodiment of the invention provides a kind of coding method skipped based on block partition mode, comprising:
Obtain block to be encoded, the left encoding block of the block to be encoded and the top encoding block of the block to be encoded, and root
According to the size of each encoding block, coding block type belonging to the left encoding block and the top encoding block is determined；Wherein, described
Encoding block type includes: vertical class and horizontal class；The size of the encoding block of the vertical class includes: 4*16,4*32,8*16,8*
32；The size of the encoding block of the horizontal class includes: 16*4,16*8,32*4,32*8；
If the left encoding block is vertical class with the top encoding block, all horizontal class Fractionation regimens are skipped,
The block to be encoded is subjected to pre-segmentation by different vertical class Fractionation regimens, obtains several encoding blocks to be processed；Wherein, each
The encoding block to be processed includes several sub- encoding blocks；
If the left encoding block and the top encoding block are horizontal class, all vertical class Fractionation regimens are skipped,
The block to be encoded is subjected to pre-segmentation by different horizontal class Fractionation regimens, obtains several encoding blocks to be processed；Wherein, each
The encoding block to be processed includes several sub- encoding blocks；
The cost value of the optimal intra prediction mode when block to be encoded does not carry out pre-segmentation is calculated, the first cost is obtained
Value；
It calculates in each coding module to be processed, the cost value of the optimal intra prediction mode of each sub- encoding block is simultaneously asked
With the cost value of each encoding block to be processed of acquisition；
By first cost value and the cost value of all encoding blocks to be processed, mutually compared, and will generation
It is worth lesser encoding block, as target code block；
The block to be encoded is encoded according to the partitioning scheme of the target code block and optimal intra prediction mode.
Further, the coding block type further include: the first additional classes；The size of the encoding block of first additional classes
It include: 16*16 and 32*32.
Further, further includes: according to the size of the block to be encoded, determine region class belonging to the block to be encoded
Type；
If the block to be encoded is horizontal class, when the left encoding block is the first additional classes and the top encoding block
When for vertical class, all horizontal class Fractionation regimens are skipped, the block to be encoded is divided in advance by different vertical class Fractionation regimen
It cuts, obtains several encoding blocks to be processed；When the left encoding block is the first additional classes and the top encoding block is horizontal class
When, all vertical class Fractionation regimens are skipped, after the block to be encoded is carried out pre-segmentation by different level class Fractionation regimen, are obtained
Several encoding blocks to be processed；Wherein, each encoding block to be processed includes several sub- encoding blocks；
If the block to be encoded is vertical class, when the top encoding block is the first additional classes and the left encoding block
When for vertical class, all horizontal class Fractionation regimens are skipped, the block to be encoded is divided in advance by different vertical class Fractionation regimen
After cutting, several encoding blocks to be processed are obtained；When the top encoding block is the first additional classes and the left encoding block is horizontal
When class, all vertical class Fractionation regimens are skipped, after the block to be encoded is carried out pre-segmentation by different level class Fractionation regimen, are obtained
Obtain several encoding blocks to be processed；Wherein, each encoding block to be processed includes several sub- encoding blocks；
If the block to be encoded is the first additional classes, when the left encoding block is vertical with the top encoding block
When class, then all horizontal class Fractionation regimens are skipped, the block to be encoded are subjected to pre-segmentation by different vertical class Fractionation regimens,
Obtain several encoding blocks to be processed；When the left encoding block and the top encoding block are horizontal class, then all hang down is skipped
The block to be encoded is carried out pre-segmentation by different horizontal class Fractionation regimens, obtains several volumes to be processed by straight class Fractionation regimen
Code block；Wherein, each encoding block to be processed includes several sub- encoding blocks.
Further, the coding block type further include: the second additional classes；The coded block size of second additional classes is
8*8；
If the block to be encoded is the second additional classes, when the top encoding block and the left encoding block are vertical
When class, all horizontal class Fractionation regimens are skipped, the block to be encoded is subjected to pre-segmentation by different vertical class Fractionation regimens, is obtained
Obtain several encoding blocks to be processed；Wherein, each encoding block to be processed includes several sub- encoding blocks；
When the top encoding block and the left encoding block are horizontal class, all vertical class Fractionation regimens are skipped,
The block to be encoded is subjected to pre-segmentation by different horizontal class Fractionation regimens, obtains several encoding blocks to be processed；Wherein, each
The encoding block to be processed includes several sub- encoding blocks；
When the top encoding block is the first additional classes and the left encoding block is vertical class, all horizontal classes are skipped
The block to be encoded is carried out pre-segmentation by different vertical class Fractionation regimens, obtains several encoding blocks to be processed by Fractionation regimen；
Wherein, each encoding block to be processed includes several sub- encoding blocks；
When the top encoding block is the first additional classes and the left encoding block is horizontal class, all vertical classes are skipped
The block to be encoded is carried out pre-segmentation by different horizontal class Fractionation regimens, obtains several encoding blocks to be processed by Fractionation regimen.
Wherein, each encoding block to be processed includes several sub- encoding blocks；
Further, the optimal intra prediction mode of each reason encoding block is determined in the following manner:
Obtain the initial candidate mode list of encoding block；
The SATD cost value of each initial candidate mode in the initial candidate mode list is calculated, and according to following public affairs
Formula carries out schema update, obtains the second candidate pattern list:
Wherein, M is the list for the candidate pattern that cost value arranges from small to large, and X=0 indicates Planar mode, X=1 table
Show DC mode；
The smallest two candidate patterns of cost value are chosen in the second candidate pattern list, then add 3 MPM
Mode and duplicate removal obtain the list of third candidate pattern；
The RDO in stage is carefully selected to calculate all candidate patterns in the third candidate pattern list；
Optimal intra prediction mode by the smallest candidate pattern of RDO cost value, as the encoding block to be processed.
On the basis of above method item embodiment, present invention correspondence provides device item embodiment；
Another embodiment of the present invention provides the devices that one is skipped based on block partition mode, including encoding block obtains and type
Determination module, block to be encoded pre-segmentation module, target code block obtain module and coding module；The target code block obtains
Module includes cost value computation subunit and cost value comparison subunit；
Wherein, the encoding block acquisition and type decision module, for obtaining the left of block to be encoded, the block to be encoded
The top encoding block of encoding block and the block to be encoded, and according to the size of each encoding block, determine the left encoding block and institute
State coding block type belonging to the encoding block of top；Wherein, the coding block type includes: vertical class and horizontal class；It is described vertical
The size of the encoding block of class includes: 4*16,4*32,8*16,8*32；The size of the encoding block of the horizontal class include: 16*4,
16*8,32*4,32*8；
The block to be encoded pre-segmentation module obtains several volumes to be processed for carrying out pre-segmentation to the block to be encoded
Code block, specifically: if the left encoding block is vertical class with the top encoding block, skip all horizontal class segmentation moulds
The block to be encoded is carried out pre-segmentation by different vertical class Fractionation regimens, obtains several encoding blocks to be processed by formula；Wherein,
Each encoding block to be processed includes several sub- encoding blocks；
If the left encoding block and the top encoding block are horizontal class, all vertical class Fractionation regimens are skipped,
The block to be encoded is subjected to pre-segmentation by different horizontal class Fractionation regimens, obtains several encoding blocks to be processed；Wherein, each
The encoding block to be processed includes several sub- encoding blocks；
The cost value computation subunit, for calculating the optimal intra prediction when block to be encoded does not carry out pre-segmentation
The cost value of mode obtains the first cost value；It calculates in each coding module to be processed, in the optimal frames of each sub- encoding block
The cost value of prediction mode and summation obtain the cost value of each encoding block to be processed；
The cost value comparison subunit, for by the generation of first cost value and all encoding blocks to be processed
Value, is mutually compared, and by the lesser encoding block of cost value, as target code block；
The coding module, for the partitioning scheme and optimal intra prediction mode according to the target code block to described
Block to be encoded is encoded.
On the basis of above method item embodiment, the present invention provides another embodiments；
Another embodiment of the present invention provides a kind of code device skipped based on block partition mode, including processor, deposit
Reservoir and storage in the memory and are configured as the computer program executed by the processor, and the processor is held
It realizes when the row computer program and is skipped described in the above-mentioned any one method item embodiment of the present invention based on block partition mode
Coding method.
On the basis of above method item embodiment, the present invention provides another embodiments；
Another embodiment of the present invention provides a kind of storage medium, the storage medium includes the computer program of storage,
Wherein, equipment where controlling the storage medium when the computer program is run executes the above-mentioned any one method of the present invention
The coding method skipped described in item embodiment based on block partition mode.
It is had the following beneficial effects: by implementing the embodiment of the present invention
The embodiment of the invention discloses a kind of coding method skipped based on block partition mode, device and storage medium, sides
Method includes block to be encoded, the left encoding block of block to be encoded and the top encoding block of block to be encoded first being obtained, then according to a left side
Type belonging to square encoding block and top encoding block judges the partitioning scheme that block to be encoded needs to skip, specifically: when left is compiled
Code block is vertical class with top encoding block, then skips all horizontal class Fractionation regimens, and block to be encoded is pressed different vertical classes
Fractionation regimen carries out pre-segmentation, if left encoding block and top encoding block are horizontal class, skips all vertical class segmentation moulds
Block to be encoded is carried out pre-segmentation by different horizontal class Fractionation regimens by formula；Calculate block to be encoded and each coding to be processed
The cost value of block, using the lesser encoding block of cost value as target code block；According to the partitioning scheme of target code block and optimal
Intra prediction mode encodes block to be encoded.In this way in the determination of code block segmentation mode, code segment point has been skipped
Mode is cut, all Fractionation regimens of traversal block to be encoded is not needed, greatly reduces calculation amount, to improve coding rate drop
The low scramble time.
Detailed description of the invention
Fig. 1 is the flow diagram for the coding method skipped based on block partition mode that one embodiment of the invention provides.
Fig. 2 is the flow chart that the optimal intra prediction mode that one embodiment of the invention provides determines.
Fig. 3 is test after the coding method skipped based on block partition mode that one embodiment of the invention provides is performed
Result data table.
Fig. 4 is that the structure for the code device skipped based on block partition mode that one embodiment of the invention provides is intended to.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It is a kind of process for coding method skipped based on block partition mode that one embodiment of the invention provides referring to Fig. 1
Schematic diagram, comprising the following steps:
Step S101, it compiles the top for obtaining block to be encoded, the left encoding block of the block to be encoded and the block to be encoded
Code block, and according to the size of each encoding block, determine coding block type belonging to the left encoding block and the top encoding block；
Wherein, the coding block type includes: vertical class and horizontal class；The size of the encoding block of the vertical class includes: 4*16,4*
32,8*16,8*32；The size of the encoding block of the horizontal class includes: 16*4,16*8,32*4,32*8；
If step S102, the described left encoding block is vertical class with the top encoding block, all horizontal classes are skipped
The block to be encoded is carried out pre-segmentation by different vertical class Fractionation regimens, obtains several encoding blocks to be processed by Fractionation regimen；
If the left encoding block and the top encoding block are horizontal class, skip all vertical class Fractionation regimens, will it is described to
Encoding block carries out pre-segmentation by different horizontal class Fractionation regimens, obtains several encoding blocks to be processed；Wherein, each described wait locate
Managing encoding block includes several sub- encoding blocks.
Step S103, the cost value for calculating the optimal intra prediction mode when block to be encoded does not carry out pre-segmentation, is obtained
Obtain the first cost value；It calculates in each coding module to be processed, the cost of the optimal intra prediction mode of each sub- encoding block
It is worth and sums, obtains the cost value of each encoding block to be processed；By first cost value and all described to be processed
The cost value of encoding block, is mutually compared, and by the lesser encoding block of cost value, as target code block.
Step S104, according to the partitioning scheme of the target code block and optimal intra prediction mode to the block to be encoded
It is encoded.
For step S101, in H.265/VVC, quaternary tree that division mode uses, ternary tree, binary tree combine mixed
Close tree construction.One coding tree block (Coding Tree Block, CTB) carries out quad-tree partition first.In the leaf of quaternary tree
Node reuses quaternary tree, ternary tree or binary tree and divides downwards.Wherein, for binary tree divides, it is divided into two kinds of divisions
Type, i.e., horizontal binary tree segmentation (SPLIT_BT_HOR) and vertical binary tree segmentation (SPLIT_BT_VER).For ternary tree
For, coding unit is split with the ratio of 1:2:1, also there are two types of type is divided, i.e., horizontal ternary tree divides (SPLIT_
TT_HOR) and vertical ternary tree divides (SPLIT_TT_VER).
In order to obtain optimal division result, VVC takes all possible segmentation situation of traversal, to each division result
Carry out the calculating of cost value, finally using the minimum partitioning scheme of cost value as final code division in a manner of, but such do
Method is due to that will encode all possible segmentation situation, and computationally intensive, coding rate is slow, and the scramble time is long.
The present invention takes in view of the spatial correlation in video frame using encoded good with top on the left of unit to be encoded
CU size judge the unlikely partitioning scheme of current CU, to skip these Fractionation regimens, treat coding unit progress
Segmentation.
It should be noted that above-mentioned left encoding block and top encoding block is all encoded region, after coding
Area size can learn partitioning schemes used by them；If the size of encoding block be 4*16,4*32,8*16,8*32,
Then illustrate above-mentioned top encoding block and left encoding block, is split in coding using vertical class Fractionation regimen, if
The size of encoding block is 16*4,16*8,32*4,32*8, then illustrates above-mentioned top encoding block and left encoding block, is adopted in coding
Horizontal class Fractionation regimen is split；
It should be noted that above-mentioned horizontal class Fractionation regimen and vertical class Fractionation regimen, for different size of coding
Meaning is different for block, such as the encoding block of a 16x16, and Fractionation regimen includes: quaternary tree, horizontal binary tree, hangs down
Straight binary tree, horizontal ternary tree, vertical ternary tree are not divided and (are not divided and also calculate a kind of Fractionation regimen).So for 16x16
Encoding block for, corresponding horizontal class Fractionation regimen just has: horizontal binary tree and horizontal ternary tree, corresponding vertical class
Fractionation regimen just has: vertical binary tree and vertical ternary tree.
And the encoding block of a 16x8 its Fractionation regimen includes: horizontal binary tree, vertical binary tree, vertical ternary tree, no
Segmentation.So at this point for the encoding block of 16x8 for.Its corresponding horizontal class Fractionation regimen just only has horizontal binary tree, right
The vertical class Fractionation regimen answered just has: vertical binary tree and vertical ternary tree.
In step s101, block to be encoded is first obtained, then obtains the coding that carried out positioned at block to be encoded left
Left encoding block, and the top encoding block for having carried out coding above block to be encoded；Further according to top encoding block and
The size of left encoding block determines the classification that they belong to, and if it is above-mentioned horizontal class, then illustrates top encoding block and left
Encoding block then illustrates top encoding block if it is above-mentioned vertical class when being encoded, using horizontal class Fractionation regimen
With left encoding block when being encoded, using vertical class Fractionation regimen.
For step S102, in a preferred embodiment, determined in S101 top encoding block and left coding
After the coding block type of block, so that it may learn, top encoding block and left the encoding block used segmentation type in coding
It is horizontal class Fractionation regimen, or vertical class Fractionation regimen；
If left encoding block is vertical class with the top encoding block, illustrate that top encoding block and left encoding block exist
When being encoded, using vertical class Fractionation regimen.Size at this time regardless of above-mentioned block to be encoded, all directly skip to
The corresponding all horizontal class Fractionation regimens of encoding block, are split block to be encoded using vertical class Fractionation regimen, obtain several
A encoding block to be processed, each encoding block to be processed include several sub- encoding blocks；
Such as the block to be encoded that an area size is 16x8, if its left encoding block and the top encode
Block is vertical class, then will skip the segmentation of horizontal binary tree when the block to be encoded to 16x8 carries out pre-segmentation
Mode carries out pre-segmentation using the partitioning scheme of vertical binary tree and vertical ternary tree, can obtain at this time 2 it is different wait locate
Encoding block is managed, if assuming after being split using the partitioning scheme of vertical binary tree, encoding block A to be processed is obtained, then at this time
Encoding block A to be processed just contains the sub- coding module that two sizes are 8x8.Assuming that using the partitioning scheme of vertical ternary tree
After being split, encoding block B to be processed is obtained, then encoding block B to be processed just contains the son that two sizes are 4x8 at this time
The sub- coding module that coding module and a size are 8x8；
And left encoding block and the top encoding block are horizontal class, then illustrate that top encoding block and left encoding block exist
When being encoded, using horizontal class Fractionation regimen.Size at this time regardless of above-mentioned block to be encoded, all directly skip to
The corresponding all vertical class Fractionation regimens of encoding block, are split block to be encoded using horizontal class Fractionation regimen, obtain several
A encoding block to be processed；Such as an area size be 16x8 block to be encoded for, if its left encoding block with it is described
Top encoding block is horizontal class, then will skip vertical y-bend when the block to be encoded to 16x8 carries out pre-segmentation
The partitioning scheme of tree and vertical ternary tree carries out pre-segmentation using the partitioning scheme of horizontal binary tree, can only obtain one at this time
Encoding block to be processed.
In a preferred embodiment, block type is encoded further include: the first additional classes；The coding of first additional classes
The size of block includes: 16*16 and 32*32.
In a preferred embodiment, according to the size of the block to be encoded, area belonging to the block to be encoded is determined
Field type；
If the block to be encoded is horizontal class, when the left encoding block is the first additional classes and the top encoding block
When for vertical class, all horizontal class Fractionation regimens are skipped, the block to be encoded is divided in advance by different vertical class Fractionation regimen
It cuts, obtains several encoding blocks to be processed；When the left encoding block is the first additional classes and the top encoding block is horizontal class
When, all vertical class Fractionation regimens are skipped, after the block to be encoded is carried out pre-segmentation by different level class Fractionation regimen, are obtained
Several encoding blocks to be processed；
If the block to be encoded is vertical class, when the top encoding block is the first additional classes and the left encoding block
When for vertical class, all horizontal class Fractionation regimens are skipped, the block to be encoded is divided in advance by different vertical class Fractionation regimen
After cutting, several encoding blocks to be processed are obtained；When the top encoding block is the first additional classes and the left encoding block is horizontal
When class, all vertical class Fractionation regimens are skipped, after the block to be encoded is carried out pre-segmentation by different level class Fractionation regimen, are obtained
Obtain several encoding blocks to be processed；
If the block to be encoded is the first additional classes, when the left encoding block is vertical with the top encoding block
When class, then all horizontal class Fractionation regimens are skipped, the block to be encoded are subjected to pre-segmentation by different vertical class Fractionation regimens,
Obtain several encoding blocks to be processed；When the left encoding block and the top encoding block are horizontal class, then all hang down is skipped
The block to be encoded is carried out pre-segmentation by different horizontal class Fractionation regimens, obtains several volumes to be processed by straight class Fractionation regimen
Code block.
You need to add is that in this preferred embodiment, when left encoding block and top encoding block, area type
When being all not belonging to the first additional classes, at this point for the determination of the Fractionation regimen of block to be encoded, or with it is original consistent, i.e., when described
When left encoding block is vertical class with the top encoding block, no matter the size of block to be encoded is how many, all skips all water
The block to be encoded is carried out pre-segmentation by different vertical class Fractionation regimens, when the left encoding block by flat class Fractionation regimen
It is horizontal class with the top encoding block, no matter the size of block to be encoded is how many, all vertical class Fractionation regimens are all skipped,
The block to be encoded is subjected to pre-segmentation by different horizontal class Fractionation regimens, obtains several encoding blocks to be processed.
Further, in a preferred embodiment, block type is encoded further include: the second additional classes；Described second is attached
The coded block size for adding class is 8*8；
If the block to be encoded is the second additional classes, when the top encoding block and the left encoding block are vertical
When class, all horizontal class Fractionation regimens are skipped, the block to be encoded is subjected to pre-segmentation by different vertical class Fractionation regimens, is obtained
Obtain several encoding blocks to be processed；
When the top encoding block and the left encoding block are horizontal class, all vertical class Fractionation regimens are skipped,
The block to be encoded is subjected to pre-segmentation by different horizontal class Fractionation regimens, obtains several encoding blocks to be processed；
When the top encoding block is the first additional classes and the left encoding block is vertical class, all horizontal classes are skipped
The block to be encoded is carried out pre-segmentation by different vertical class Fractionation regimens, obtains several encoding blocks to be processed by Fractionation regimen；
When the top encoding block is the first additional classes and the left encoding block is horizontal class, all vertical classes are skipped
The block to be encoded is carried out pre-segmentation by different horizontal class Fractionation regimens, obtains several encoding blocks to be processed by Fractionation regimen.
It should be noted that the above-mentioned all embodiments of the present invention have a common point, if that is, top encoding block and
Left encoding block, when being vertical class, no matter the size of block to be encoded is how many, all skips all horizontal class Fractionation regimens, will
The block to be encoded carries out pre-segmentation by different vertical class Fractionation regimens, when the top encoding block and the left encoding block
When being horizontal class, no matter the size of block to be encoded is how many, all vertical class Fractionation regimens is all skipped, by the block to be encoded
Pre-segmentation is carried out by different horizontal class Fractionation regimens.
It should be noted that in an alternative embodiment, in addition to feelings cited by the above-mentioned all embodiments of the present invention
Except condition, the Fractionation regimen of the block to be encoded in the case of other is all normally divided by the prior art.
For step S103, preferably to capture the edge directional information in video, the intra prediction angle mode of VVC
65 kinds are expanded to from 33 kinds of HEVC.Wherein, Planar mode and DC mode remain unchanged.
Determination for optimal intra prediction mode, VVC have continued to use the mode that roughing refinement selects in HEVC.
The first stage of roughing mode carries out SATD (Sum of Absolute to 35 kinds of modes in HEVC
Transformed Difference) cost calculating, select the second-order that the lower mode of N number of cost value enters roughing mode
Section.
The angle mode adjacent thereto of angle prediction mode in N kind mode is carried out SATD cost calculating ratio by second stage
Compared with selecting N kind preferably mode.
The stage carefully is selected, 3 kinds of MPM (Most Probability Modes) mode is added in N kind mode, is removed duplicate
After mode, finally needed to carry out the candidate pattern list of RD (Rate Distortion) cost calculating.
In an embodiment of the present invention, each encoding block is corresponded to there are many intra prediction mode, optional real at one
It applies in example, the optimal intra prediction mode of each encoding block can be obtained by above-mentioned existing technology.
And in order to reduce traversal mode, the invention proposes the method that another obtains optimal intra prediction mode, tools
Body are as follows:
Obtain the initial candidate mode list of encoding block；
The SATD cost value of each initial candidate mode in the initial candidate mode list is calculated, and according to following public affairs
Formula carries out schema update, obtains the second candidate pattern list:
Wherein, M is the list for the candidate pattern that cost value arranges from small to large, and X=0 indicates Planar mode, X=1 table
Show DC mode；
The smallest two candidate patterns of cost value are chosen in the second candidate pattern list, then add 3 MPM
Mode and duplicate removal obtain the list of third candidate pattern；
The RDO in stage is carefully selected to calculate all candidate patterns in the third candidate pattern list；
Optimal intra prediction mode by the smallest candidate pattern of RDO cost value, as the encoding block to be processed.
The above method as shown in Figure 2 is divided into three phases, respectively calculations list mode cost stage, update list mode
Stage and final mode decision stage.
First stage, initialization candidate pattern list (Candidate Modes, CM) include 2,10,18,26,34,
42,50,58,66 }, and the STAD cost value of each candidate pattern is calculated；
Second stage updates the list mode stage, and schema update formula is as follows:
Wherein, M is the list that cost value arranges from small to large.0 indicates Planar mode, and 1 indicates DC mode, and i is one
The variable gradually to progressively increase stops updating as i >=3, into the final mode decision stage using i as Rule of judgment.
The third stage model decision phase selects the smallest two candidate patterns of cost value, goes to re-add 3 MPM moulds
Formula, into carefully selecting the RDO in stage to calculate, finally using the smallest candidate pattern of RDO cost value as above-mentioned, optimal intra prediction mould
Formula.
Cost value when block to be encoded does not carry out pre-segmentation is calculated by the above method, since block to be encoded is not divided in advance
When cutting, it is that there is no submodules, therefore directly calculate, obtains the first above-mentioned cost value；It calculates each to be processed
The cost value of each sub- encoding block and summation in encoding block obtain the cost value of each encoding block to be processed, such as coding to be processed
Have sub- encoding block C1 and sub- encoding block C2 in block C, then the cost value of encoding block C to be processed is exactly, using sub- encoding block C1 and
The cost value information read group total of the sub- optimal intra prediction mode of encoding block C2 obtains.Generation when then will not carry out pre-segmentation again
Value and the cost value carried out after pre-segmentation are compared, by the smallest encoding block of cost value, as target code block；
For step S104, it should be noted that if in step s 103, the smallest encoding block of cost value be it is above-mentioned to
Encoding block, i.e. block to be encoded without segmentation when cost value be the smallest, then at this time then by block to be encoded directly as
Target code block, does not need to be split block to be encoded and directly encodes by the optimal intra prediction mode of block to be encoded.
As shown in figure 3, averagely having dropped 0.086, BD-rate rising by the PSNR for implementing the embodiment of the present invention video
1.2436%, the scramble time saved 31.885%.Therefore, the method that inventive embodiments provide can keep original video
While compression quality, coding rate can be effectively promoted.
As shown in figure 4, providing corresponding device item embodiment on the basis of above method item embodiment of the present invention；
One embodiment of the invention provide a kind of code device skipped based on block partition mode include: encoding block obtain and
Type decision module 301, block to be encoded pre-segmentation module 302, target code block obtain module 303 and coding module 304；Mesh
Marking encoding block and obtaining module 303 includes cost value computation subunit 313 and cost value comparison subunit 323；
Wherein, the encoding block acquisition and type decision module, for obtaining the left of block to be encoded, the block to be encoded
The top encoding block of encoding block and the block to be encoded, and according to the size of each encoding block, determine the left encoding block and institute
State coding block type belonging to the encoding block of top；Wherein, the coding block type includes: vertical class and horizontal class；It is described vertical
The size of the encoding block of class includes: 4*16,4*32,8*16,8*32；The size of the encoding block of the horizontal class include: 16*4,
16*8,32*4,32*8；
The block to be encoded pre-segmentation module obtains several volumes to be processed for carrying out pre-segmentation to the block to be encoded
Code block, specifically: if the left encoding block is vertical class with the top encoding block, skip all horizontal class segmentation moulds
The block to be encoded is carried out pre-segmentation by different vertical class Fractionation regimens, obtains several encoding blocks to be processed by formula；
If the left encoding block and the top encoding block are horizontal class, all vertical class Fractionation regimens are skipped,
The block to be encoded is subjected to pre-segmentation by different horizontal class Fractionation regimens, obtains several encoding blocks to be processed；
Cost value computation subunit, for calculating the optimal intra prediction mode when block to be encoded does not carry out pre-segmentation
Cost value, obtain the first cost value；It calculates in each coding module to be processed, the optimal intra prediction of each sub- encoding block
The cost value of mode and summation obtain the cost value of each encoding block to be processed；
The cost value comparison subunit, for by the generation of first cost value and all encoding blocks to be processed
Value, is mutually compared, and by the lesser encoding block of cost value, as target code block；
The coding module, for the partitioning scheme and optimal intra prediction mode according to the target code block to described
Block to be encoded is encoded.
It is understood that above-mentioned apparatus item embodiment be it is corresponding with the method for the present invention item embodiment, can be real
The coding method skipped based on block partition mode that the existing above-mentioned any one method item embodiment of the present invention provides.
It should be noted that the apparatus embodiments described above are merely exemplary, wherein described be used as separation unit
The units/modules of explanation may or may not be physically separated, and the component shown as units/modules can be
Or it may not be physical unit/module, it can it is in one place, or may be distributed over multiple network units
On.Some or all of the modules therein can be selected to achieve the purpose of the solution of this embodiment according to the actual needs.In addition,
In Installation practice attached drawing provided by the invention, the connection relationship between module indicates there is communication connection between them, specifically
It can be implemented as one or more communication bus or signal wire.Those of ordinary skill in the art are in the feelings not made the creative labor
Under condition, it can understand and implement.The schematic diagram is only based on the example for the code device that block partition mode is skipped, not
The restriction to the code device skipped based on block partition mode is constituted, may include components more more or fewer than diagram, or
Combine certain components or different components；
On the basis of above method item embodiment of the present invention, another device item embodiment is provided；
It includes: processor, storage that one embodiment of the invention, which provides a kind of code device skipped based on block partition mode,
Device and storage in the memory and are configured as the computer program executed by the processor, and the processor executes
It is skipped described in the above-mentioned any one method item embodiment of the realization present invention based on block partition mode when the computer program
Coding method.
In this embodiment, illustratively, the computer program can be divided into one or more modules/mono-
Member, one or more of module/units are stored in the memory, and are executed by the processor, to complete this
Invention.One or more of module/units can be the series of computation machine program instruction section that can complete specific function, should
Instruction segment is for describing implementation procedure of the computer program in the code device skipped based on block partition mode.
The code device skipped based on block partition mode can be desktop PC, notebook, palm PC and
Cloud server etc. calculates equipment.The code device equipment skipped based on block partition mode may include, but be not limited only to, place
Manage device, memory.It will be understood by those skilled in the art that for example described code device skipped based on block partition mode can be with
Including input-output equipment, network access equipment, bus etc..
Alleged processor can be central processing unit (Central Processing Unit, CPU), can also be it
His general processor, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor or the processor is also possible to any conventional processor
Deng the processor is the control centre of the code device skipped based on block partition mode, utilizes various interfaces and route
Connect the various pieces for the code device entirely skipped based on block partition mode.
The memory can be used for storing the computer program and/or module, and the processor is by operation or executes
Computer program in the memory and/or module are stored, and calls the data being stored in memory, described in realization
Various functions based on the code device that block partition mode is skipped.The memory can mainly include storing program area and storage number
According to area, wherein storing program area can application program needed for storage program area, at least one function (for example sound plays function
Energy, image player function etc.) etc.；Storage data area can store according to mobile phone use created data (such as audio data,
Phone directory etc.) etc..In addition, memory may include high-speed random access memory, it can also include nonvolatile memory, example
Such as hard disk, memory, plug-in type hard disk, intelligent memory card (Smart Media Card, SMC), secure digital (Secure
Digital, SD) card, flash card (Flash Card), at least one disk memory, flush memory device or other volatibility
Solid-state memory.
On the basis of above method item embodiment of the present invention, another embodiment is provided；
One embodiment of the invention provides a kind of storage medium, and the storage medium includes the computer program of storage,
In, equipment where controlling the storage medium in computer program operation is executed such as the above-mentioned any one method of the present invention
The coding method skipped described in item embodiment based on block partition mode
Storage medium mentioned herein is computer readable storage medium.The volume skipped based on block partition mode
If code collection at module/unit be realized in the form of SFU software functional unit and when sold or used as an independent product, can
To be stored in a computer readable storage medium.Based on this understanding, the present invention realizes in above-described embodiment method
All or part of the process, relevant hardware can also be instructed to complete by computer program, the computer program
It can be stored in a computer readable storage medium, the computer program is when being executed by processor, it can be achieved that above-mentioned each side
The step of method embodiment.Wherein, the computer program includes computer program code, and the computer program code can be
Source code form, object identification code form, executable file or certain intermediate forms etc..The computer-readable medium can wrap
It includes: any entity or device, recording medium, USB flash disk, mobile hard disk, magnetic disk, light of the computer program code can be carried
Disk, computer storage, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random
Access Memory), electric carrier signal, telecommunication signal and software distribution medium etc..
It is had the following beneficial effects: by implementing the embodiment of the present invention
The embodiment of the invention discloses a kind of coding method skipped based on block partition mode, device and storage medium, sides
Method includes block to be encoded, the left encoding block of block to be encoded and the top encoding block of block to be encoded first being obtained, then according to a left side
Type belonging to square encoding block and top encoding block judges the partitioning scheme that block to be encoded needs to skip, specifically: when left is compiled
Code block is vertical class with top encoding block, then skips all horizontal class Fractionation regimens, and block to be encoded is pressed different vertical classes
Fractionation regimen carries out pre-segmentation, if left encoding block and top encoding block are horizontal class, skips all vertical class segmentation moulds
Block to be encoded is carried out pre-segmentation by different horizontal class Fractionation regimens by formula；Last block to be encoded and each pre-segmentation wait locating
The cost value for managing the optimal intra prediction mode of encoding block, compares the cost value of block to be encoded and the generation of each pre-segmentation rear region
Aggregate value, using the lesser segmentation situation of cost value as target code block；According to the partitioning scheme of target code block and optimal
Intra prediction mode encodes block to be encoded.In this way in the determination of code block segmentation mode, code segment point has been skipped
Mode is cut, all Fractionation regimens of traversal block to be encoded is not needed, greatly reduces calculation amount, to improve coding rate drop
The low scramble time.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (8)
1. a kind of coding method skipped based on block partition mode characterized by comprising
Block to be encoded, the left encoding block of the block to be encoded and the top encoding block of the block to be encoded are obtained, and according to each
The size of encoding block determines coding block type belonging to the left encoding block and the top encoding block；Wherein, the coding
Block type includes: vertical class and horizontal class；The size of the encoding block of the vertical class includes: 4*16,4*32,8*16,8*32；Institute
The size for stating the encoding block of horizontal class includes: 16*4,16*8,32*4,32*8；
If the left encoding block is vertical class with the top encoding block, all horizontal class Fractionation regimens are skipped, by institute
It states block to be encoded and carries out pre-segmentation by different vertical class Fractionation regimens, obtain different encoding blocks to be processed；Wherein, Mei Yisuo
Stating encoding block to be processed includes several sub- encoding blocks；
If the left encoding block and the top encoding block are horizontal class, all vertical class Fractionation regimens are skipped, by institute
It states block to be encoded and carries out pre-segmentation by different horizontal class Fractionation regimens, obtain several encoding blocks to be processed；Wherein, each described
Encoding block to be processed includes several sub- encoding blocks；
The cost value of the optimal intra prediction mode when block to be encoded does not carry out pre-segmentation is calculated, the first cost value is obtained；
It calculates in each coding module to be processed, the cost value of the optimal intra prediction mode of each sub- encoding block and summation,
Obtain the cost value of each encoding block to be processed；
It by first cost value and the cost value of all encoding blocks to be processed, is mutually compared, and by cost value
Lesser encoding block, as target code block；
The block to be encoded is encoded according to the partitioning scheme of the target code block and optimal intra prediction mode.
2. the coding method skipped as described in claim 1 based on block partition mode, which is characterized in that the coding block type
Further include: the first additional classes；The size of the encoding block of first additional classes includes: 16*16 and 32*32.
3. the coding method skipped as claimed in claim 2 based on block partition mode, which is characterized in that further include:
According to the size of the block to be encoded, area type belonging to the block to be encoded is determined；
If the block to be encoded is horizontal class, when the left encoding block is the first additional classes and the top encoding block is vertical
When straight class, all horizontal class Fractionation regimens are skipped, the block to be encoded is subjected to pre-segmentation by different vertical class Fractionation regimen, is obtained
Obtain several encoding blocks to be processed；When the left encoding block is the first additional classes and the top encoding block is horizontal class, jump
All vertical class Fractionation regimens are crossed, after the block to be encoded is carried out pre-segmentation by different level class Fractionation regimen, are obtained several
Encoding block to be processed；Wherein, each encoding block to be processed includes several sub- encoding blocks；
If the block to be encoded is vertical class, when the top encoding block is the first additional classes and the left encoding block is vertical
When straight class, all horizontal class Fractionation regimens are skipped, after the block to be encoded is carried out pre-segmentation by different vertical class Fractionation regimen,
Obtain several encoding blocks to be processed；When the top encoding block is the first additional classes and the left encoding block is horizontal class,
All vertical class Fractionation regimens are skipped, after the block to be encoded is carried out pre-segmentation by different level class Fractionation regimen, if obtaining
Do encoding block to be processed；Wherein, each encoding block to be processed includes several sub- encoding blocks；
If the block to be encoded is the first additional classes, when the left encoding block is vertical class with the top encoding block
When, then all horizontal class Fractionation regimens are skipped, the block to be encoded is subjected to pre-segmentation by different vertical class Fractionation regimens, is obtained
Obtain several encoding blocks to be processed；When the left encoding block and the top encoding block are horizontal class, then skip all vertical
The block to be encoded is carried out pre-segmentation by different horizontal class Fractionation regimens, obtains several codings to be processed by class Fractionation regimen
Block；Wherein, each encoding block to be processed includes several sub- encoding blocks.
4. the coding method skipped as claimed in claim 2 based on block partition mode, which is characterized in that the coding block type
Further include: the second additional classes；The coded block size of second additional classes is 8*8；
If the block to be encoded is the second additional classes, when the top encoding block and the left encoding block are vertical class
When, all horizontal class Fractionation regimens are skipped, the block to be encoded is subjected to pre-segmentation by different vertical class Fractionation regimens, is obtained
Several encoding blocks to be processed；Wherein, each encoding block to be processed includes several sub- encoding blocks；
When the top encoding block and the left encoding block are horizontal class, all vertical class Fractionation regimens are skipped, by institute
It states block to be encoded and carries out pre-segmentation by different horizontal class Fractionation regimens, obtain several encoding blocks to be processed；Wherein, each described
Encoding block to be processed includes several sub- encoding blocks；
When the top encoding block is the first additional classes and the left encoding block is vertical class, all horizontal class segmentations are skipped
The block to be encoded is carried out pre-segmentation by different vertical class Fractionation regimens, obtains several encoding blocks to be processed by mode；Its
In, each encoding block to be processed includes several sub- encoding blocks；
When the top encoding block is the first additional classes and the left encoding block is horizontal class, all vertical class segmentations are skipped
The block to be encoded is carried out pre-segmentation by different horizontal class Fractionation regimens, obtains several encoding blocks to be processed by mode；Its
In, each encoding block to be processed includes several sub- encoding blocks；.
5. the coding method skipped as described in claim 1 based on block partition mode, which is characterized in that in the following manner really
The optimal intra prediction mode of fixed each encoding block:
Obtain the initial candidate mode list of an encoding block；
Calculate the SATD cost value of each initial candidate mode in the initial candidate mode list, and according to the following formula into
Row schema update obtains the second candidate pattern list:
Wherein, M is the list for the candidate pattern that cost value arranges from small to large, and X=0 indicates Planar mode, and X=1 indicates DC
Mode；
The smallest two candidate patterns of cost value are chosen in the second candidate pattern list, then add 3 MPM modes simultaneously
Duplicate removal obtains the list of third candidate pattern；
The RDO in stage is carefully selected to calculate all candidate patterns in the third candidate pattern list；
Optimal intra prediction mode by the smallest candidate pattern of RDO cost value, as the encoding block.
6. a kind of code device skipped based on block partition mode, which is characterized in that including encoding block acquisition and type decision mould
Block, block to be encoded pre-segmentation module, target code block obtain module and coding module；The target code block obtains module packet
Include cost value computation subunit and cost value comparison subunit；
Wherein, the encoding block obtains and type decision module, the left for obtaining block to be encoded, the block to be encoded encode
The top encoding block of block and the block to be encoded, and according to the size of each encoding block, determine the left encoding block and it is described on
Coding block type belonging to square encoding block；Wherein, the coding block type includes: vertical class and horizontal class；The vertical class
The size of encoding block includes: 4*16,4*32,8*16,8*32；The size of the encoding block of the horizontal class include: 16*4,16*8,
32*4,32*8；
The block to be encoded pre-segmentation module, for obtaining several encoding blocks to be processed to block to be encoded progress pre-segmentation,
If specifically: the left encoding block is vertical class with the top encoding block, skips all horizontal class Fractionation regimens, will
The block to be encoded carries out pre-segmentation by different vertical class Fractionation regimens, obtains several encoding blocks to be processed；Wherein, Mei Yisuo
Stating encoding block to be processed includes several sub- encoding blocks；
If the left encoding block and the top encoding block are horizontal class, all vertical class Fractionation regimens are skipped, by institute
It states block to be encoded and carries out pre-segmentation by different horizontal class Fractionation regimens, obtain several encoding blocks to be processed；Wherein, each described
Encoding block to be processed includes several sub- encoding blocks；
The cost value computation subunit, for calculating the optimal intra prediction mode when block to be encoded does not carry out pre-segmentation
Cost value, obtain the first cost value；It calculates in each coding module to be processed, the optimal intra prediction of each sub- encoding block
The cost value of mode and summation obtain the cost value of each encoding block to be processed；
The cost value comparison subunit, for by the cost of first cost value and all encoding blocks to be processed
Value, is mutually compared, and by the lesser encoding block of cost value, as target code block；
The coding module, for the partitioning scheme and optimal intra prediction mode according to the target code block to described wait compile
Code block is encoded.
7. a kind of code device skipped based on block partition mode, including processor, memory and it is stored in the memory
In and be configured as the computer program executed by the processor, the processor is realized such as when executing the computer program
The coding method skipped described in any one of claim 1 to 5 based on block partition mode.
8. a kind of storage medium, which is characterized in that the storage medium includes the computer program of storage, wherein in the meter
Equipment calculation machine program controls the storage medium when running where execute as described in any one of claim 1 to 5 based on
The coding method that block partition mode is skipped.
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