CN109547782A - MPM candidate list construction method, device, electronic equipment and storage medium - Google Patents
MPM candidate list construction method, device, electronic equipment 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
- H04N19/103—Selection of coding mode or of prediction mode
- H04N19/109—Selection of coding mode or of prediction mode among a plurality of temporal predictive coding modes
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- H—ELECTRICITY
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- 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
- H04N19/103—Selection of coding mode or of prediction mode
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- 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
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Abstract
The application is MPM candidate list construction method, comprising: determine the width and height of current prediction block about a kind of MPM candidate list construction method, device, electronic equipment and storage medium；Judge whether width and the height of the current prediction block are equal, if the width of the current prediction block and height are unequal, the size relation of width and height based on the current prediction block determines the corresponding target prediction mode of the current prediction block；Pass through identified target prediction mode construction MPM candidate list.By technical solution provided by the embodiments of the present application, may be implemented to cut prediction mode, the expression range of prediction mode can be saved, to prediction mode encoded consumed by the time shortened, improve the efficiency encoded to prediction mode；And the optimal prediction modes of current prediction block can be more precisely predicted, improve image compression rate.
Description
Technical field
This application involves technical field of video coding more particularly to MPM candidate list construction methods, device, electronic equipment
And storage medium.
Background technique
Intra prediction is to be predicted by reference block spatially adjacent with current prediction block current prediction block, with drop
The process of low spatial redundancy.Most probable mode (Most probable mode, MPM), is widely used in intra prediction
Model prediction technology.For Accurate Prediction video content, intra prediction generally includes a variety of prediction modes.Also, in order to effective
Indicate the optimal prediction modes of final choice, it will usually construct MPM candidate list.
In the related technology, MPM candidate list would generally include preset number MPM.It is proposed below with JVET-K0529
It is illustrated for the scheme of 67 kinds of prediction mode+3MPM.
In the scheme for 67 kinds of prediction mode+3MPM that JVET-K0529 is proposed, before constructing MPM candidate list, really
The prediction mode of the fixed left reference block adjacent with current prediction block and the prediction mode of upper reference block, and based on left reference block
The prediction mode of prediction mode and upper reference block constructs MPM candidate list.Also, constructed MPM candidate list includes 3
MPM.As it can be seen that in the related technology, in intra prediction, the MPM that MPM candidate list includes is relatively fixed, not to prediction mode
It is cut, so that the efficiency encoded to prediction mode is lower.
Summary of the invention
To overcome the problems in correlation technique, the application provides a kind of MPM candidate list construction method, device, electricity
Sub- equipment and storage medium.
According to the embodiment of the present application in a first aspect, providing a kind of MPM candidate list construction method, comprising:
Determine the width and height of current prediction block；
Judge whether width and the height of the current prediction block are equal, if the width and height of the current prediction block
Unequal, then the size relation of width and height based on the current prediction block determines the corresponding mesh of the current prediction block
Mark prediction mode；
Pass through identified target prediction mode construction MPM candidate list.
Optionally, the size relation of the width and height based on the current prediction block, determines the current predictive
The step of block corresponding target prediction mode, comprising:
If the width of the current prediction block is greater than height, horizontal prediction mode and target vertical prediction mode are determined
For the corresponding target prediction mode of the current prediction block, wherein the target vertical prediction mode is that the first utilization rate is greater than
The vertical prediction mode of first default utilization rate；
If the width of the current prediction block is less than height, vertical prediction mode and target level prediction mode are determined
For the corresponding target prediction mode of the current prediction block, wherein the target level prediction mode is that the second utilization rate is greater than
The vertical prediction mode of second default utilization rate.
Optionally, it in the size relation of the width based on the current prediction block and height, determines described current pre-
Before the step of surveying block corresponding target prediction mode, the method also includes:
Determine the left reference block adjacent with the current prediction block the first reference prediction mode and with the current predictive
Second reference prediction mode of the adjacent upper reference block of block.
Optionally, the size relation of the width and height based on the current prediction block, determines the current predictive
The step of block corresponding target prediction mode includes:
If the width of the current prediction block is greater than height, by the horizontal forecast mould in the first reference prediction mode
Formula is determined as the corresponding target prediction mode of the current prediction block；
If the height of the current prediction block is greater than width, by the vertical prediction mould in the second reference prediction mode
Formula is determined as the corresponding target prediction mode of the current prediction block.
Optionally, the horizontal prediction mode by the first reference prediction mode is determined as the current prediction block
The step of corresponding target prediction mode, comprising:
Determine the third utilization rate of each horizontal prediction mode in the first reference prediction mode；
The corresponding horizontal prediction mode of target third utilization rate is determined as the corresponding target prediction of the current prediction block
Mode, wherein the target third utilization rate is that the use of utilization rate is preset in identified third utilization rate, greater than third
Rate；
Correspondingly, the vertical prediction mode by the second reference prediction mode is determined as the current prediction block
The step of corresponding target prediction mode, comprising:
Determine the 4th utilization rate of each vertical prediction mode in the second reference prediction mode；
The corresponding vertical prediction mode of the 4th utilization rate of target is determined as the corresponding target prediction of the current prediction block
Mode, wherein the 4th utilization rate of target is in identified 4th utilization rate, greater than the use of the 4th default utilization rate
Rate.
According to the second aspect of the embodiment of the present application, a kind of MPM candidate list construction device is provided, comprising:
Height-width determination unit is configured to determine that the width and height of current prediction block；
Prediction mode determination unit, if be configured as in the width and unequal height of the current prediction block,
The size relation for executing the width based on the current prediction block and height, determines the corresponding target prediction of the current prediction block
Mode；
MPM candidate list construction unit is configured as through identified target prediction mode construction MPM candidate list.
Optionally, the prediction mode determination unit, is also configured to
If the width of the current prediction block is greater than height, horizontal prediction mode and target vertical prediction mode are determined
For the corresponding target prediction mode of the current prediction block, wherein the target vertical prediction mode is that the first utilization rate is greater than
The vertical prediction mode of first default utilization rate；
If the width of the current prediction block is less than height, vertical prediction mode and target level prediction mode are determined
For the corresponding target prediction mode of the current prediction block, wherein the target level prediction mode is that the second utilization rate is greater than
The vertical prediction mode of second default utilization rate.
Optionally, the device further include:
Reference prediction pattern determining unit, be configured as execute prediction mode determination unit determine target prediction mode it
Before, determine the first reference prediction mode of the left reference block adjacent with the current prediction block and adjacent with the current prediction block
Upper reference block the second reference prediction mode.
Optionally, the prediction mode determination unit, is also configured to
If the width of the current prediction block is greater than height, by the horizontal forecast mould in the first reference prediction mode
Formula is determined as the corresponding target prediction mode of the current prediction block；
If the height of the current prediction block is greater than width, by the vertical prediction mould in the second reference prediction mode
Formula is determined as the corresponding target prediction mode of the current prediction block.
Optionally, the prediction mode determination unit, is also configured to
Determine the third utilization rate of each horizontal prediction mode in the first reference prediction mode；
The corresponding horizontal prediction mode of target third utilization rate is determined as the corresponding target prediction of the current prediction block
Mode, wherein the target third utilization rate is that the use of utilization rate is preset in identified third utilization rate, greater than third
Rate；
Alternatively,
Determine the 4th utilization rate of each vertical prediction mode in the second reference prediction mode；
The corresponding vertical prediction mode of the 4th utilization rate of target is determined as the corresponding target prediction of the current prediction block
Mode, wherein the 4th utilization rate of target is in identified 4th utilization rate, greater than the use of the 4th default utilization rate
Rate.
According to the third aspect of the embodiment of the present application, a kind of electronic equipment is provided, comprising:
Processor；
Memory for storage processor executable instruction；
Wherein, the processor is configured to:
Determine the width and height of current prediction block；
Judge whether width and the height of the current prediction block are equal, if the width and height of the current prediction block
Unequal, then the size relation of width and height based on the current prediction block determines the corresponding mesh of the current prediction block
Mark prediction mode；
Pass through identified target prediction mode construction MPM candidate list.
According to the fourth aspect of the embodiment of the present application, a kind of non-transitorycomputer readable storage medium is provided, when described
When instruction in storage medium is executed by the processor of mobile terminal, so that mobile terminal is able to carry out a kind of MPM candidate list
Construction method, which comprises
Determine the width and height of current prediction block；
Judge whether width and the height of the current prediction block are equal, if the width and height of the current prediction block
Unequal, then the size relation of width and height based on the current prediction block determines the corresponding mesh of the current prediction block
Mark prediction mode；
Pass through identified target prediction mode construction MPM candidate list.
According to the 5th of the embodiment of the present application the aspect, a kind of application program/computer program product is provided, when it is being calculated
When running on machine, enable a computer to execute a kind of MPM candidate list construction method, which comprises
Determine the width and height of current prediction block；
Judge whether width and the height of the current prediction block are equal, if the width and height of the current prediction block
Unequal, then the size relation of width and height based on the current prediction block determines the corresponding mesh of the current prediction block
Mark prediction mode；
Pass through identified target prediction mode construction MPM candidate list.
Embodiments herein provide technical solution can include the following benefits: building MPM candidate list it
Before, it is contemplated that the width and height of current prediction block, the corresponding target prediction mode of current prediction block are based on current prediction block
Width and the size relation of height determine, and pass through identified target prediction mode construction MPM candidate list.To real
Now prediction mode is cut, the expression range of prediction mode can be saved, when carrying out encoding consumed to prediction mode
Between shortened, improve the efficiency encoded to prediction mode；And it can more precisely predict current prediction block
Optimal prediction modes, improve image compression rate.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
The application can be limited.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the application
Example, and together with specification it is used to explain the principle of the application.
Fig. 1 is a kind of flow chart of MPM candidate list construction method shown according to an exemplary embodiment；
Fig. 2 be it is shown according to an exemplary embodiment it is a kind of H.265 in 33 kinds of prediction directions schematic diagram；
Fig. 3 is the flow chart of another kind MPM candidate list construction method shown according to an exemplary embodiment；
Fig. 4 is a kind of block diagram of MPM candidate list construction device shown according to an exemplary embodiment；
Fig. 5 is the block diagram of a kind of electronic equipment shown according to an exemplary embodiment；
Fig. 6 is the block diagram of a kind of electronic equipment shown according to an exemplary embodiment；
Fig. 7 is the block diagram of another electronic equipment shown according to an exemplary embodiment.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the application.On the contrary, they be only with it is such as appended
The example of the consistent device and method of some aspects be described in detail in claims, the application.
Under normal conditions, in intra prediction, it will usually construct MPM candidate list.In the related technology, MPM candidate list
It would generally include preset number MPM.
For example, in the scheme of the JVET-K0529 67 kinds of prediction mode+3MPM proposed, in building MPM candidate column
Before table, the prediction mode of the left reference block adjacent with current prediction block and the prediction mode of upper reference block are determined, and be based on
The prediction mode of the prediction mode of left reference block and upper reference block constructs MPM candidate list.Also, constructed MPM candidate column
Table includes 3 MPM.
Seen from the above description, in the related technology, in intra prediction, the MPM that MPM candidate list includes is relatively fixed,
Prediction mode is not cut, the technical problem lower to the efficiency of prediction mode coding.
In order to solve technical problem present in the relevant technologies, the embodiment of the present application provides MPM candidate list building side
Method, device, electronic equipment and storage medium, the electronic equipment can be mobile terminal, server etc., and the application is to electronic equipment
It is not specifically limited.
It describes in detail first below to MPM candidate list construction method provided by the embodiments of the present application.For convenience
It describes, executing subject is known as electronic equipment in following embodiment.
Fig. 1 is a kind of flow chart of MPM candidate list construction method shown according to an exemplary embodiment, such as Fig. 1 institute
Show, the MPM candidate list construction method is for including the following steps in electronic equipment.
In step s101, the width and height of current prediction block are determined.
In intra prediction, the division shape of current prediction block can be square shape or non-square shape, because
This, the width and height of current prediction block can be equal, can also be unequal.
For example, if the division shape of current prediction block are as follows: square shape, and size are as follows: 4*4, at this point, current predictive
The width of block is 4, and height is also 4, it is seen then that in this case, the width of current prediction block is identical with height；For another example if
The division shape of current prediction block are as follows: rectangular shape, and size are as follows: 4*8, at this point, the width of current prediction block is 4, height
It is 8, it is seen then that in this case, the width and height of current prediction block be not identical.
In step s 102, judge whether width and the height of current prediction block are equal, if the width of current prediction block
Unequal with height, then the size relation of the width based on current prediction block and height, determines the corresponding target of current prediction block
Prediction mode.
By the description of step S101 it is found that the height and width of current prediction block may be identical, it is also possible to different.In determination
After the width and height of current prediction block, it can be determined that whether the width and height of current prediction block are equal.If current pre-
Width and the height for surveying block are unequal, it may be said that the content of bright current prediction block has directionality, and the width of current prediction block
Degree and height phase difference are bigger, it may be said that the directionality of the content of bright current prediction block is more obvious.Therefore, determining current predictive
When the width and unequal height of block, can the width based on current prediction block and height size relation, determine current predictive
The corresponding target prediction mode of block.
In one embodiment, the size relation of the width based on current prediction block and height, determines current prediction block
The step of corresponding target prediction mode may include following two step a1-a2:
A1 determines horizontal prediction mode and target vertical prediction mode if the width of current prediction block is greater than height
For the corresponding target prediction mode of current prediction block, wherein target vertical prediction mode is that the first utilization rate is default greater than first
The vertical prediction mode of utilization rate.
If the width of current prediction block is greater than height, illustrate that the horizontal direction attribute of the current prediction block is greater than Vertical Square
To attribute, therefore, for the current prediction block, the vertical prediction mode of part vertical direction can be excluded, that is,
It says, horizontal prediction mode and target vertical prediction mode can be determined as to the corresponding target prediction mode of the current prediction block.
It should be noted that, although the horizontal direction attribute of the current prediction block is greater than vertical direction attribute, still, for
For the current prediction block, the vertical prediction mode of all vertical direction cannot usually be excluded, this is because some are vertical
The utilization rate of prediction mode is larger, that is to say, that target vertical prediction mode is that the first utilization rate is greater than the first default use
The vertical prediction mode of rate.For example, the utilization rate of the vertical prediction mode of diagonal direction is larger, the vertical prediction mould of diagonal direction
Formula cannot be excluded.First default utilization rate can be set according to the actual situation, and the embodiment of the present application is preset to first to be made
It is not specifically limited with the size of rate.
A2 determines vertical prediction mode and target level prediction mode if the width of current prediction block is less than height
For the corresponding target prediction mode of current prediction block, wherein target level prediction mode is that the second utilization rate is default greater than second
The vertical prediction mode of utilization rate.
If the width of current prediction block is less than height, illustrate that the vertical direction attribute of the current prediction block is greater than level side
To attribute, therefore, for the current prediction block, the horizontal prediction mode in part of horizontal direction can be excluded, that is,
It says, vertical prediction mode and target level prediction mode can be determined as to the corresponding target prediction mode of the current prediction block.
It should be noted that, although the vertical direction attribute of the current prediction block is greater than horizontal direction attribute, still, for
For the current prediction block, the horizontal prediction mode of all horizontal directions cannot usually be excluded, this is because some are horizontal
The utilization rate of prediction mode is larger, that is to say, that target level prediction mode is that the second utilization rate is greater than the second default use
The horizontal prediction mode of rate.For example, the utilization rate of the horizontal prediction mode of diagonal direction is larger, the horizontal forecast mould of diagonal direction
Formula cannot be excluded.Second default utilization rate can be set according to the actual situation, and the embodiment of the present application is preset to second to be made
It is not specifically limited with the size of rate.
For example, as Fig. 2 be H.265/HEVC in 33 kinds of prediction modes schematic diagram.
In Fig. 2, horizontal prediction mode has: H0 (mode index 10), H-2 (mode index 11), H+2 (mode sequence
Number for 9), H-5 (mode index 12), H+5 (mode index 8), H-9 (mode index 13), H+9 (mode index 7),
H-13 (mode index 14), H+13 (mode index 6), H-17 (mode index 15), H+17 (mode index 5), H-
21 (mode index 16), H+21 (mode index 4), H-26 (mode index 17), H+26 (mode index 3) and H+32
(mode index 17).
Vertical prediction mode has: V0 (mode index 26), V-2 (mode index 25), V+2 (mode index 27),
V-5 (mode index 24), V+5 (mode index 28), V-9 (mode index 23), V+9 (mode index 29), V-13
(mode index 22), V+13 (mode index 30), V-17 (mode index 21), V+17 (mode index 31), V-21
(mode index 20), V+21 (mode index 32), V-26 (mode index 19), V+26 (mode index 33), V-32
(mode index 18) and V+32 (mode index 34).
For the convenience of description, indicating the width of current prediction block with W, the height of current prediction block is indicated with H.
If the ratio of W and H is 2, the prediction mode that mode index is 22-25 and 27-30 can be excluded, therefore, currently
The corresponding target prediction mode of prediction block can be with are as follows: the prediction mode of mode index 2-21,26 and 31-34.
If the ratio of W and H is greater than 2, the prediction mode that mode index is 19-25 and 27-33 can be excluded, therefore, when
The corresponding target prediction mode of preceding prediction block can be with are as follows: the prediction mode of mode index 2-18,26 and 34.
If the ratio of W and H is greater than 1, the corresponding target prediction mode of current prediction block can be with are as follows: mode index 2-34
Prediction mode.
If the ratio of W and H is 1/2, the prediction mode that mode index is 6-9 and 11-14 can be excluded, therefore, currently
The corresponding target prediction mode of prediction block are as follows: the prediction mode of mode index 2-5,10,15-34.
If the ratio of W and H less than 1/2, can exclude the prediction mode that mode index is 3-9 and 11-17, therefore, when
The corresponding target prediction mode of preceding prediction block are as follows: the prediction mode of mode index 2,10,18-34.
Certainly, the example above is only by way of example to the corresponding target prediction mode of current prediction block is described, originally
Application embodiment is not specifically limited the corresponding target prediction mode of current prediction block.
In step s 103, pass through identified target prediction mode construction MPM candidate list.
After the corresponding target prediction mode of current prediction block has been determined, identified target prediction mode structure can be passed through
Build MPM candidate list.
As it can be seen that in technical solution provided by the embodiments of the present application, before constructing MPM candidate list, it is contemplated that current pre-
Survey the width and height of block, the corresponding target prediction mode of current prediction block is the big of width based on current prediction block and height
What small relationship determined, and pass through identified target prediction mode construction MPM candidate list.Prediction mode is carried out to realize
Cut, the expression range of prediction mode can be saved, to prediction mode encoded consumed by the time shortened, improve
The efficiency that prediction mode is encoded；And the optimal prediction modes of current prediction block can be more precisely predicted, it mentions
Image compression rate is risen.
Fig. 3 is the flow chart of another kind MPM candidate list construction method shown according to an exemplary embodiment, such as Fig. 3
Shown, the MPM candidate list construction method is for including the following steps in electronic equipment.
In step S301, the width and height of current prediction block are determined.
In intra prediction, the division shape of current prediction block can be square shape or non-square shape, because
This, the width and height of current prediction block can be equal, can also be unequal.
For example, if the division shape of current prediction block are as follows: square shape, and size are as follows: 4*4, at this point, current predictive
The width of block is 4, and height is also 4, it is seen then that in this case, the width of current prediction block is identical with height；For another example if
The division shape of current prediction block are as follows: rectangular shape, and size are as follows: 4*8, at this point, the width of current prediction block is 4, height
It is 8, it is seen then that in this case, the width and height of current prediction block be not identical.
In step s 302, determine the left reference block adjacent with current prediction block the first reference prediction mode and with it is current
Second reference prediction mode of the adjacent upper reference block of prediction block.
It in this step, can be by direction prediction mould in the most frequently used frame of the left reference block adjacent with current prediction block
Formula is as the first reference prediction mode；Likewise it is possible to the frame that the upper reference block adjacent with current prediction block is most frequently used
Inner estimation mode is as the second reference prediction mode.
In one implementation, determine the left reference block adjacent with current prediction block the first reference prediction mode and with
The step of second reference prediction mode of current prediction block adjacent upper reference block may include following two step b1-b2:
The prediction mode of the left reference block of target is determined as the first reference prediction mode, wherein the left reference block of target by b1
Are as follows: in each left reference block adjacent with current prediction block, the width of the size relation of width and height and current prediction block and
The consistent left reference block of the size relation of height；
The prediction mode of reference block in target is determined as the second reference prediction mode, wherein reference block in target by b2
Are as follows: in each upper reference block adjacent with current prediction block, the width of the size relation of width and height and current prediction block and
The consistent upper reference block of the size relation of height.
It in this implementation, can be by target when determining the first reference prediction mode and the second reference prediction mode
The prediction mode of left reference block is determined as the first reference prediction mode, correspondingly, can be by the prediction mode of reference block in target
It is determined as the second reference prediction mode.Wherein, the left reference block of target are as follows: in each left reference block adjacent with current prediction block,
The width of the size relation and current prediction block of width and height and the consistent left reference block of the size relation of height；Join in target
Examine block are as follows: in each upper reference block adjacent with current prediction block, the width of the size relation of width and height and current prediction block
The consistent upper reference block of size relation of degree and height.Identified first reference prediction mode and the second ginseng can be improved in this way
Examine the accuracy rate of prediction mode.
It should be noted that step S302 can be executed prior to step S301, step S302 can also be same with step S301
Shi Zhihang, the embodiment of the present application are not specifically limited the execution sequence of step S301 and step S302.
In step S303, judge whether the width of current prediction block and height are equal, if the width of current prediction block
Greater than height, the horizontal prediction mode in the first reference prediction mode is determined as the corresponding target prediction mould of current prediction block
Formula；If the height of current prediction block is greater than width, the vertical prediction mode in the second reference prediction mode is determined as currently
The corresponding target prediction mode of prediction block.
If the width of current prediction block is greater than height, illustrate that the horizontal direction attribute of the current prediction block is greater than Vertical Square
It, therefore, can be preferentially true by the horizontal prediction mode in the first reference prediction mode for the current prediction block to attribute
It is set to the corresponding target prediction mode of current prediction block；If the width of current prediction block is less than height, illustrate the current predictive
The vertical direction attribute of block is greater than horizontal direction attribute, therefore, for the current prediction block, by the second reference prediction mode
In vertical prediction mode be preferentially determined as the corresponding target prediction mode of current prediction block.
It in one embodiment, will be in the first reference prediction mode if the width of current prediction block is greater than height
Horizontal prediction mode is determined as the step of current prediction block corresponding target prediction mode, may include:
Determine the third utilization rate of each horizontal prediction mode in the first reference prediction mode；
The corresponding horizontal prediction mode of target third utilization rate is determined as the corresponding target prediction mode of current prediction block,
Wherein, target third utilization rate is that the utilization rate of utilization rate is preset in identified third utilization rate, greater than third.
Correspondingly, if the height of current prediction block is greater than width, by the vertical prediction mould in the second reference prediction mode
Formula is determined as the step of current prediction block corresponding target prediction mode, may include:
Determine the 4th utilization rate of each vertical prediction mode in the second reference prediction mode；
The corresponding vertical prediction mode of the 4th utilization rate of target is determined as the corresponding target prediction mode of current prediction block,
Wherein, the 4th utilization rate of target is in identified 4th utilization rate, greater than the utilization rate of the 4th default utilization rate.
It should be noted that in the first reference prediction mode each horizontal prediction mode third utilization rate and second
4th utilization rate of each vertical prediction mode in reference prediction mode can be determined according to most frequently used mode principle；
Third is preset utilization rate and the 4th utilization rate and can be determined according to the actual situation, and the embodiment of the present application is default to third to be used
Rate and the 4th utilization rate are not specifically limited.
For example, the width of current prediction block and the ratio of height are less than 1/2, it is seen then that the width of current prediction block is small
In height, vertical prediction mode is preferentially selected, it is assumed that the upper reference block adjacent with current prediction block there are 3, reference on these three
The vertical prediction mode of block is successively are as follows: the prediction mode and mode sequence that prediction mode that mode index is 30, mode index are 21
Number be 21 prediction mode.According to most frequently used mode principle, the 4th utilization rate of the prediction mode that mode index is 21 is big
The 4th utilization rate for being 30 in mode index, and the 4th utilization rate of prediction mode that mode index is 21 is greater than the 4th and default makes
With rate.Therefore, the 4th utilization rate of the prediction mode that can be 21 by mode index is determined as the 4th utilization rate of target, by mode
The prediction mode of serial number 21 is determined as the corresponding target prediction mode of current prediction block.
Certainly, if the vertical prediction mode of reference block is successively on three are as follows: the prediction mode that mode index is 30, mode
The prediction mode of serial number 21, the prediction mode that mode index is 22.Prediction mode and mode sequence due to mode index for 21
Number it may be considered the prediction mode of same direction range for 22 prediction mode, therefore, according to most frequently used mode principle,
4th utilization rate of the prediction mode that the 4th utilization rate and mode index for the prediction mode that mode index is 21 are 22, is greater than mould
4th utilization rate of the prediction mode of formula serial number 30, and mode index be 21 prediction mode the 4th utilization rate and mode sequence
Number the 4th default utilization rate is all larger than for 22 the 4th utilization rate of prediction mode.Therefore, can by mode index be 21 it is pre-
4th utilization rate of the prediction mode that the 4th utilization rate or mode index of survey mode are 22 is determined as the 4th utilization rate of target,
By mode index be 21 prediction mode or mode index be 22 prediction mode be determined as the corresponding target of current prediction block
Prediction mode.
In step S204, pass through identified target prediction mode construction MPM candidate list.
After the corresponding target prediction mode of current prediction block has been determined, identified target prediction mode structure can be passed through
Build MPM candidate list.
As it can be seen that in technical solution provided by the embodiments of the present application, before constructing MPM candidate list, it is contemplated that current pre-
Survey the width and height of block, the corresponding target prediction mode of current prediction block is the big of width based on current prediction block and height
What small relationship, the first reference prediction mode and the second reference prediction mode determined, and pass through identified target prediction mode
Construct MPM candidate list.Prediction mode is cut to realize, the expression range of prediction mode can be saved, to prediction
Mode encoded consumed by the time shortened, improve the efficiency encoded to prediction mode；And it can be more
The optimal prediction modes for accurately predicting current prediction block, improve image compression rate.
Fig. 4 is a kind of MPM candidate list construction device block diagram shown according to an exemplary embodiment.Referring to Fig. 4, the dress
It sets including height-width determination unit 401, prediction mode determination unit 402 and MPM candidate list construction unit 403.
The height-width determination unit 401 is configured to determine that the width and height of current prediction block
The prediction mode determination unit 402, if be configured as unequal in the width and height of the current prediction block
When, then the size relation of the width based on the current prediction block and height is executed, determines the corresponding mesh of the current prediction block
Mark prediction mode；
The MPM candidate list construction unit 403 is configured as executing through identified target prediction mode construction MPM
Candidate list.
In one implementation, the prediction mode determination unit 402, is also configured to
If the width of the current prediction block is greater than height, horizontal prediction mode and target vertical prediction mode are determined
For the corresponding target prediction mode of the current prediction block, wherein the target vertical prediction mode is that the first utilization rate is greater than
The vertical prediction mode of first default utilization rate；
If the width of the current prediction block is less than height, vertical prediction mode and target level prediction mode are determined
For the corresponding target prediction mode of the current prediction block, wherein the target level prediction mode is that the second utilization rate is greater than
The vertical prediction mode of second default utilization rate.
In one embodiment, the device can also include:
Reference prediction pattern determining unit, be configured as execute prediction mode determination unit determine target prediction mode it
Before, determine the first reference prediction mode of the left reference block adjacent with the current prediction block and adjacent with the current prediction block
Upper reference block the second reference prediction mode.
In one implementation, the prediction mode determination unit 402, is also configured to
If the width of the current prediction block is greater than height, by the horizontal forecast mould in the first reference prediction mode
Formula is determined as the corresponding target prediction mode of the current prediction block；
If the height of the current prediction block is greater than width, by the vertical prediction mould in the second reference prediction mode
Formula is determined as the corresponding target prediction mode of the current prediction block.
In one implementation, the horizontal prediction mode by the first reference prediction mode is determined as described
The step of current prediction block corresponding target prediction mode, comprising:
Determine the third utilization rate of each horizontal prediction mode in the first reference prediction mode；
The corresponding horizontal prediction mode of target third utilization rate is determined as the corresponding target prediction of the current prediction block
Mode, wherein the target third utilization rate is that the use of utilization rate is preset in identified third utilization rate, greater than third
Rate；
Correspondingly, the vertical prediction mode by the second reference prediction mode is determined as the current prediction block
The step of corresponding target prediction mode, comprising:
Determine the 4th utilization rate of each vertical prediction mode in the second reference prediction mode；
The corresponding vertical prediction mode of the 4th utilization rate of target is determined as the corresponding target prediction of the current prediction block
Mode, wherein the 4th utilization rate of target is in identified 4th utilization rate, greater than the use of the 4th default utilization rate
Rate.
About the device in above-described embodiment, wherein modules execute the concrete mode of operation in related this method
Embodiment in be described in detail, no detailed explanation will be given here.
As it can be seen that in technical solution provided by the embodiments of the present application, before constructing MPM candidate list, it is contemplated that current pre-
Survey the width and height of block, the corresponding target prediction mode of current prediction block is the big of width based on current prediction block and height
What small relationship determined, and pass through identified target prediction mode construction MPM candidate list.Prediction mode is carried out to realize
Cut, the expression range of prediction mode can be saved, to prediction mode encoded consumed by the time shortened, improve
The efficiency that prediction mode is encoded；And the optimal prediction modes of current prediction block can be more precisely predicted, it mentions
Image compression rate is risen.
Fig. 5 is a kind of block diagram of electronic equipment for the building of MPM candidate list shown according to an exemplary embodiment,
The electronic equipment includes:
Processor 501；
Memory 502 for storage processor executable instruction；
Wherein, the processor is configured to:
Determine the width and height of current prediction block；
Judge whether width and the height of the current prediction block are equal, if the width and height of the current prediction block
Unequal, then the size relation of width and height based on the current prediction block determines the corresponding mesh of the current prediction block
Mark prediction mode；
Pass through identified target prediction mode construction MPM candidate list.
As it can be seen that in technical solution provided by the embodiments of the present application, before constructing MPM candidate list, it is contemplated that current pre-
Survey the width and height of block, the corresponding target prediction mode of current prediction block is the big of width based on current prediction block and height
What small relationship determined, and pass through identified target prediction mode construction MPM candidate list.Prediction mode is carried out to realize
Cut, the expression range of prediction mode can be saved, to prediction mode encoded consumed by the time shortened, improve
The efficiency that prediction mode is encoded；And the optimal prediction modes of current prediction block can be more precisely predicted, it mentions
Image compression rate is risen.
Fig. 6 is a kind of frame of electronic equipment 600 for the building of MPM candidate list shown according to an exemplary embodiment
Figure.For example, electronic equipment 600 can be mobile phone, computer, digital broadcasting terminal, messaging device, game control
Platform, tablet device, Medical Devices, body-building equipment, personal digital assistant etc..
Referring to Fig. 6, device 600 may include following one or more components: processing component 602, memory 604, electric power
Component 606, multimedia component 605, audio component 610, the interface 612 of input/output (I/O), sensor module 614, and
Communication component 616.
The integrated operation of the usual control device 600 of processing component 602, such as with display, telephone call, data communication, phase
Machine operation and record operate associated operation.Processing component 602 may include that one or more processors 620 refer to execute
It enables, to perform all or part of the steps of the methods described above.In addition, processing component 602 may include one or more modules, just
Interaction between processing component 602 and other assemblies.For example, processing component 602 may include multi-media module, it is more to facilitate
Interaction between media component 605 and processing component 602.
Memory 604 is configured as storing various types of data to support the operation in equipment 600.These data are shown
Example includes the instruction of any application or method for operating on device 600, contact data, and telephone book data disappears
Breath, picture, video etc..Memory 604 can be by any kind of volatibility or non-volatile memory device or their group
It closes and realizes, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM) is erasable to compile
Journey read-only memory (EPROM), programmable read only memory (PROM), read-only memory (ROM), magnetic memory, flash
Device, disk or CD.
Power supply module 606 provides electric power for the various assemblies of device 600.Power supply module 606 may include power management system
System, one or more power supplys and other with for device 600 generate, manage, and distribute the associated component of electric power.
Multimedia component 605 includes the screen of one output interface of offer between described device 600 and user.One
In a little embodiments, screen may include liquid crystal display (LCD) and touch panel (TP).If screen includes touch panel, screen
Curtain may be implemented as touch screen, to receive input signal from the user.Touch panel includes one or more touch sensings
Device is to sense the gesture on touch, slide, and touch panel.The touch sensor can not only sense touch or sliding action
Boundary, but also detect duration and pressure associated with the touch or slide operation.In some embodiments, more matchmakers
Body component 605 includes a front camera and/or rear camera.When equipment 600 is in operation mode, such as screening-mode or
When video mode, front camera and/or rear camera can receive external multi-medium data.Each front camera and
Rear camera can be a fixed optical lens system or have focusing and optical zoom capabilities.
Audio component 610 is configured as output and/or input audio signal.For example, audio component 610 includes a Mike
Wind (MIC), when device 600 is in operation mode, when such as call mode, recording mode, and voice recognition mode, microphone is matched
It is set to reception external audio signal.The received audio signal can be further stored in memory 604 or via communication set
Part 616 is sent.In some embodiments, audio component 610 further includes a loudspeaker, is used for output audio signal.
I/O interface 612 provides interface between processing component 602 and peripheral interface module, and above-mentioned peripheral interface module can
To be keyboard, click wheel, button etc..These buttons may include, but are not limited to: home button, volume button, start button and lock
Determine button.
Sensor module 614 includes one or more sensors, and the state for providing various aspects for device 600 is commented
Estimate.For example, sensor module 614 can detecte the state that opens/closes of equipment 600, and the relative positioning of component, for example, it is described
Component is the display and keypad of device 600, and sensor module 614 can be with 600 1 components of detection device 600 or device
Position change, the existence or non-existence that user contacts with device 600,600 orientation of device or acceleration/deceleration and device 600
Temperature change.Sensor module 614 may include proximity sensor, be configured to detect without any physical contact
Presence of nearby objects.Sensor module 614 can also include optical sensor, such as CMOS or ccd image sensor, at
As being used in application.In some embodiments, which can also include acceleration transducer, gyro sensors
Device, Magnetic Sensor, pressure sensor or temperature sensor.
Communication component 616 is configured to facilitate the communication of wired or wireless way between device 600 and other equipment.Device
600 can access the wireless network based on communication standard, such as WiFi, carrier network (such as 2G, 3G, 4G or 5G) or them
Combination.In one exemplary embodiment, communication component 616 is received via broadcast channel from the wide of external broadcasting management system
Broadcast signal or broadcast related information.In one exemplary embodiment, the communication component 616 further includes near-field communication (NFC)
Module, to promote short range communication.For example, radio frequency identification (RFID) technology, Infrared Data Association (IrDA) can be based in NFC module
Technology, ultra wide band (UWB) technology, bluetooth (BT) technology and other technologies are realized.
In the exemplary embodiment, device 600 can be believed by one or more application specific integrated circuit (ASIC), number
Number processor (DSP), digital signal processing appts (DSPD), programmable logic device (PLD), field programmable gate array
(FPGA), controller, microcontroller, microprocessor or other electronic components are realized, for executing above-mentioned MPM candidate list building
Method.
In the exemplary embodiment, a kind of non-transitorycomputer readable storage medium including instruction, example are additionally provided
It such as include the memory 604 of instruction, above-metioned instruction can be executed by the processor 620 of device 600 to complete the above method.For example,
The non-transitorycomputer readable storage medium can be ROM, random access memory (RAM), CD-ROM, tape, floppy disk
With optical data storage devices etc..
As it can be seen that in technical solution provided by the embodiments of the present application, before constructing MPM candidate list, it is contemplated that current pre-
Survey the width and height of block, the corresponding target prediction mode of current prediction block is the big of width based on current prediction block and height
What small relationship determined, and pass through identified target prediction mode construction MPM candidate list.Prediction mode is carried out to realize
Cut, the expression range of prediction mode can be saved, to prediction mode encoded consumed by the time shortened, improve
The efficiency that prediction mode is encoded；And the optimal prediction modes of current prediction block can be more precisely predicted, it mentions
Image compression rate is risen.
Fig. 7 is a kind of frame of electronic equipment 700 for the building of MPM candidate list shown according to an exemplary embodiment
Figure.For example, device 700 may be provided as a server.Referring to Fig. 7, device 700 includes processing component 722, is further wrapped
One or more processors, and the memory resource as representated by memory 732 are included, it can be by processing component 722 for storing
Execution instruction, such as application program.The application program stored in memory 732 may include one or more every
One corresponds to the module of one group of instruction.In addition, processing component 722 is configured as executing instruction, to execute above-mentioned MPM candidate column
Table construction method.
Device 700 can also include the power management that a power supply module 726 is configured as executive device 700, and one has
Line or radio network interface 750 are configured as device 700 being connected to network and input and output (I/O) interface 758.Dress
Setting 700 can operate based on the operating system for being stored in memory 732, such as Windows ServerTM, Mac OS XTM,
UnixTM, LinuxTM, FreeBSDTM or similar.
As it can be seen that in technical solution provided by the embodiments of the present application, before constructing MPM candidate list, it is contemplated that current pre-
Survey the width and height of block, the corresponding target prediction mode of current prediction block is the big of width based on current prediction block and height
What small relationship determined, and pass through identified target prediction mode construction MPM candidate list.Prediction mode is carried out to realize
Cut, the expression range of prediction mode can be saved, to prediction mode encoded consumed by the time shortened, improve
The efficiency that prediction mode is encoded；And the optimal prediction modes of current prediction block can be more precisely predicted, it mentions
Image compression rate is risen.
The embodiment of the present application also provides a kind of non-transitorycomputer readable storage mediums, when in the storage medium
When instruction is executed by the processor of mobile terminal, so that mobile terminal is able to carry out a kind of MPM candidate list construction method, it is described
Method includes:
Determine the width and height of current prediction block；
Judge whether width and the height of the current prediction block are equal, if the width and height of the current prediction block
Unequal, then the size relation of width and height based on the current prediction block determines the corresponding mesh of the current prediction block
Mark prediction mode；
Pass through identified target prediction mode construction MPM candidate list.
As it can be seen that in technical solution provided by the embodiments of the present application, before constructing MPM candidate list, it is contemplated that current pre-
Survey the width and height of block, the corresponding target prediction mode of current prediction block is the big of width based on current prediction block and height
What small relationship determined, and pass through identified target prediction mode construction MPM candidate list.Prediction mode is carried out to realize
Cut, the expression range of prediction mode can be saved, to prediction mode encoded consumed by the time shortened, improve
The efficiency that prediction mode is encoded；And the optimal prediction modes of current prediction block can be more precisely predicted, it mentions
Image compression rate is risen.
The embodiment of the present application also provides a kind of application program/computer program products, when run on a computer,
It enables a computer to execute a kind of MPM candidate list construction method, which comprises
Determine the width and height of current prediction block；
Judge whether width and the height of the current prediction block are equal, if the width and height of the current prediction block
Unequal, then the size relation of width and height based on the current prediction block determines the corresponding mesh of the current prediction block
Mark prediction mode；
Pass through identified target prediction mode construction MPM candidate list.
As it can be seen that in technical solution provided by the embodiments of the present application, before constructing MPM candidate list, it is contemplated that current pre-
Survey the width and height of block, the corresponding target prediction mode of current prediction block is the big of width based on current prediction block and height
What small relationship determined, and pass through identified target prediction mode construction MPM candidate list.Prediction mode is carried out to realize
Cut, the expression range of prediction mode can be saved, to prediction mode encoded consumed by the time shortened, improve
The efficiency that prediction mode is encoded；And the optimal prediction modes of current prediction block can be more precisely predicted, it mentions
Image compression rate is risen.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to its of the application
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the application, these modifications, purposes or
Person's adaptive change follows the general principle of the application and including the undocumented common knowledge in the art of the application
Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the application are by following
Claim is pointed out.
Each embodiment in this specification is all made of relevant mode and describes, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for device reality
For applying example, electronic equipment embodiment, storage medium embodiment, since it is substantially similar to the method embodiment, so description
Fairly simple, the relevent part can refer to the partial explaination of embodiments of method.
It should be understood that the application is not limited to the precise structure that has been described above and shown in the drawings, and
And various modifications and changes may be made without departing from the scope thereof.Scope of the present application is only limited by the accompanying claims.
Claims (10)
1. a kind of MPM candidate list construction method characterized by comprising
Determine the width and height of current prediction block；
Judge whether width and the height of the current prediction block are equal, if the width of the current prediction block and height not phase
Deng the size relation of width and height then based on the current prediction block determines that the corresponding target of the current prediction block is pre-
Survey mode；
Pass through identified target prediction mode construction MPM candidate list.
2. MPM candidate list construction method according to claim 1, which is characterized in that described to be based on the current predictive
The width of block and the size relation of height, the step of determining the current prediction block corresponding target prediction mode, comprising:
If the width of the current prediction block is greater than height, horizontal prediction mode and target vertical prediction mode are determined as institute
State the corresponding target prediction mode of current prediction block, wherein the target vertical prediction mode is that the first utilization rate is greater than first
The vertical prediction mode of default utilization rate；
If the width of the current prediction block is less than height, vertical prediction mode and target level prediction mode are determined as institute
State the corresponding target prediction mode of current prediction block, wherein the target level prediction mode is that the second utilization rate is greater than second
The vertical prediction mode of default utilization rate.
3. MPM candidate list construction method according to claim 1, which is characterized in that described based on described current pre-
Before the step of surveying the width of block and the size relation of height, determining the current prediction block corresponding target prediction mode, institute
State method further include:
Determine the left reference block adjacent with the current prediction block the first reference prediction mode and with the current prediction block phase
Second reference prediction mode of adjacent upper reference block.
4. MPM candidate list construction method according to claim 3, which is characterized in that described to be based on the current predictive
The width of block and the size relation of height, the step of determining the current prediction block corresponding target prediction mode include:
If the width of the current prediction block is greater than height, and the horizontal prediction mode in the first reference prediction mode is true
It is set to the corresponding target prediction mode of the current prediction block；
If the height of the current prediction block is greater than width, and the vertical prediction mode in the second reference prediction mode is true
It is set to the corresponding target prediction mode of the current prediction block.
5. MPM candidate list construction method according to claim 4, which is characterized in that described that first reference is pre-
Horizontal prediction mode in survey mode is determined as the step of current prediction block corresponding target prediction mode, comprising:
Determine the third utilization rate of each horizontal prediction mode in the first reference prediction mode；
The corresponding horizontal prediction mode of target third utilization rate is determined as the corresponding target prediction mode of the current prediction block,
Wherein, the target third utilization rate is that the utilization rate of utilization rate is preset in identified third utilization rate, greater than third；
It is corresponded to correspondingly, the vertical prediction mode by the second reference prediction mode is determined as the current prediction block
Target prediction mode the step of, comprising:
Determine the 4th utilization rate of each vertical prediction mode in the second reference prediction mode；
The corresponding vertical prediction mode of the 4th utilization rate of target is determined as the corresponding target prediction mode of the current prediction block,
Wherein, the 4th utilization rate of target is in identified 4th utilization rate, greater than the utilization rate of the 4th default utilization rate.
6. a kind of MPM candidate list construction device characterized by comprising
Height-width determination unit is configured to determine that the width and height of current prediction block；
Prediction mode determination unit, if being configured as executing in the width and unequal height of the current prediction block
The size relation of width and height based on the current prediction block determines the corresponding target prediction mould of the current prediction block
Formula；
MPM candidate list construction unit is configured as through identified target prediction mode construction MPM candidate list.
7. MPM candidate list construction device according to claim 6, which is characterized in that the prediction mode determination unit,
It is also configured to
If the width of the current prediction block is greater than height, horizontal prediction mode and target vertical prediction mode are determined as institute
State the corresponding target prediction mode of current prediction block, wherein the target vertical prediction mode is that the first utilization rate is greater than first
The vertical prediction mode of default utilization rate；
If the width of the current prediction block is less than height, vertical prediction mode and target level prediction mode are determined as institute
State the corresponding target prediction mode of current prediction block, wherein the target level prediction mode is that the second utilization rate is greater than second
The vertical prediction mode of default utilization rate.
8. MPM candidate list construction device according to claim 6, which is characterized in that the device further include:
Reference prediction pattern determining unit is configured as executing before prediction mode determination unit determines target prediction mode,
Determine the first reference prediction mode of the left reference block adjacent with the current prediction block and adjacent with the current prediction block
Second reference prediction mode of upper reference block.
9. a kind of electronic equipment characterized by comprising
Processor；
Memory for storage processor executable instruction；
Wherein, the processor is configured to:
Determine the width and height of current prediction block；
Judge whether width and the height of the current prediction block are equal, if the width of the current prediction block and height not phase
Deng the size relation of width and height then based on the current prediction block determines that the corresponding target of the current prediction block is pre-
Survey mode；
Pass through identified target prediction mode construction MPM candidate list.
10. a kind of non-transitorycomputer readable storage medium, which is characterized in that when the instruction in the storage medium is by moving
When the processor of terminal executes, so that mobile terminal is able to carry out a kind of MPM candidate list construction method, which comprises
Determine the width and height of current prediction block；
Judge whether width and the height of the current prediction block are equal, if the width of the current prediction block and height not phase
Deng the size relation of width and height then based on the current prediction block determines that the corresponding target of the current prediction block is pre-
Survey mode；
Pass through identified target prediction mode construction MPM candidate list.
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