CN106254884A - Inter-frame prediction method based on H265 coding and encoder IP - Google Patents
Inter-frame prediction method based on H265 coding and encoder IP Download PDFInfo
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- CN106254884A CN106254884A CN201610871310.XA CN201610871310A CN106254884A CN 106254884 A CN106254884 A CN 106254884A CN 201610871310 A CN201610871310 A CN 201610871310A CN 106254884 A CN106254884 A CN 106254884A
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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
- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
- H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal 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
- H04N19/102—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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- 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
- 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
- H04N19/146—Data rate or code amount at the encoder output
- H04N19/147—Data rate or code amount at the encoder output according to rate distortion criteria
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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
- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
- H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
- H04N19/51—Motion estimation or motion compensation
- H04N19/513—Processing of motion vectors
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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
- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
- H04N19/587—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal sub-sampling or interpolation, e.g. decimation or subsequent interpolation of pictures in a video sequence
Abstract
The present invention relates to coding and decoding video field, particularly to coding and decoding video based on H265.The present invention provides inter-frame prediction method based on H265 coding and encoder IP, for solving the inefficient problem of current encoder method, its method further comprised the steps of: at least 1 motion vector according to candidate before interframe interpolation calculates, judge the most whether comprise identical motion vector, and identical motion vector is merged, motion vector after merging is used for interframe interpolation and calculates, and motion vector and the merging mode information of vector after merging is used for mode adjudging and bit rate distortion computation.
Description
Technical field
The present invention relates to coding and decoding video field, particularly to coding and decoding video based on H265.
Background technology
H.265 (HEVC) is the most up-to-date international video compression standards.H.265 high code efficiency is had, mainly
It is because more accurate infra-frame prediction (intra prediction) and the inter prediction (inter prediction) used.But
It is that the raising of these code efficiencies all can propose new challenge along with the raising of encoder complexity for realizing real time algorithm.
Along with the rise of wearable smart machine, hardware device integrated in little space requires increasingly low-power consumption,
And can efficiently process every affairs, especially for the social need of the popularity such as video acquisition, this also result in video
The challenge of coding system.And H265 video coding system has been short of in performance at present, being embodied in area occupied big, power consumption is big
Etc. in problem.
Summary of the invention
Given below simplify one or more aspect is summarized to try hard to provide the basic comprehension in terms of this type of.This
Summarize the extensive overview of the not all aspect contemplated, and be both not intended to identify the key or decisive of all aspects
Key element is the most non-attempts to define the scope in terms of any or all.Its unique purpose is intended to be given in simplified form one or more
Some concepts of individual aspect are using as the brightest sequence given later.
The present invention provides a kind of inter-frame prediction method based on H265 coding and encoder IP to solve existing coding system
Can be low, the problem that power consumption is big.
For achieving the above object, inventor provide inter-frame prediction method based on H265 coding, calculate at interframe interpolation
Further comprise the steps of: before
At least 1 motion vector according to candidate, it is judged that the most whether comprise identical motion vector, and by identical fortune
Dynamic vector merge, will merge after motion vector be used for interframe interpolation calculate, and will merge after motion vector and the conjunction of vector
And mode information is for mode adjudging and bit rate distortion computation.
Further, merge number of modes is set.
Further, " judge the most whether comprise identical motion vector " in step, also include judging having of merge pattern
Effect property.
For realizing the encoder IP of the inter-frame prediction method of H265 coding, merging module including motion vector, interframe is inserted
Value computing module, mode decision module and bit rate distortion computation module；
Motion vector merges after module is used for receiving use merge pattern, amvp pattern and estimation of motion vectors process defeated
The motion vector gone out, it is judged that whether comprise identical motion vector in the motion vector received, and by identical motion vector
Merge, and send the pooling information of motion vector to mode adjudging and bit rate distortion computation module；
Interframe interpolation computing module is for carrying out interframe interpolation calculating according to the motion vector after merging, it is thus achieved that video is compiled
Code；
Mode decision module is for judging optimum coding mode according to the motion vector after merging.
Further, also including main control module, main control module is used for arranging merge number of modes.
Further, described motion vector merging module is additionally operable to judge the effectiveness of merge pattern.
Being different from prior art, technique scheme, after carrying out motion vector merging, can save and transport corresponding merging
The flow time calculating correspondence of dynamic vector.Thus reduce reduction clock frequency that chip corresponding to the method can be relative thus
Reduce power consumption；For addressing relevant purpose before reaching, this one or more aspect is included in and is hereinafter fully described and in institute
The feature particularly pointed out in attached claim.The following description and drawings illustrate this one or more in terms of some say
Bright property feature.But, it is several that these features only indicate in the various modes of the principle that can use various aspect, and
And this description is intended to this type of aspects all and equivalence aspect thereof.
Accompanying drawing explanation
Below with reference to accompanying drawing, disclosed aspect is described, it is provided that accompanying drawing illustrates that and non-limiting disclosed side
Face, label sign similar elements similar in accompanying drawing, and wherein:
Fig. 1 is the merging flow process of the motion vector that the inter prediction of the present invention obtains；
Fig. 2 is the Effective judgement process of inter prediction MV；
Effective number of modes according to Fig. 3, the processing procedure of output merging patterns information；
Fig. 4 uses stream treatment to coding and decoding video；
Fig. 5 show the encoding-decoding efficiency statistics that motion vector merges；
The structural representation of the encoder IP of Fig. 6 inter-frame prediction method.
Detailed description of the invention
By describing the technology contents of technical scheme, structural feature in detail, being realized purpose and effect, below in conjunction with concrete real
Execute example and coordinate accompanying drawing to be explained in detail.In the following description, elaborate that numerous details is to provide right for explanatory purposes
Thorough understanding in terms of one or more.It will be evident that do not have these details can put into practice this type of aspect yet.
A kind of inter-frame prediction method based on H265 coding disclosed herein, further comprised the steps of: before interframe interpolation calculates
At least 1 motion vector according to candidate, it is judged that the most whether comprise identical motion vector, and by identical fortune
Dynamic vector merge, will merge after motion vector be used for interframe interpolation calculate, and will merge after motion vector and the conjunction of vector
And mode information is for mode adjudging and bit rate distortion algorithms.May be appreciated after merging identical motion vector, it is thus achieved that close
Motion vector after and, is mutually different between the motion vector after i.e. merging.
In encoder herein, (i.e. merge pattern, corresponding is used for representing the motion letter of PU to have employed merging patterns
Breath is output as merge MV), automatic prediction method (AMVP, corresponding being used for represents that the movable information of PU is output as mvp) and fortune
Dynamic estimate (i.e. ME, corresponding being used for represents that the movable information of PU is output as MV).
In merging patterns, encoder selects the movable information of PU neighbouring on time domain and spatial domain, and a pre-defined fortune
Dynamic information candidate list, encoder selects best candidate index and directly uses the motion in current PU movement compensation process to believe
Breath, and coded reference index information.And except for the difference that motion residuals is not encoded but is directly set to 0.
See Fig. 1, for the merging flow process of the motion vector that inter prediction obtains, wherein MV merge preprocessing process include right
Merge mode effectiveness judges.In certain embodiments, the fortune of candidate in the movable information candidate list of merge pattern is set
Dynamic information be number be 3, i.e. merge pattern output 3 candidate MV；Candidate in the movable information candidate list of amvp pattern is set
Movable information number be 1, i.e. amvp pattern output 1 table.
Temporal correlation is utilized to carry out the prediction of adaptive M V from Forecasting Methodology AMVP, the i.e. MVs from neighbouring PUs.Use
AMVP derives the motion vector MVs. of MV. first AMVP scanning space predicting unit PUs of current block and is then specifying region
Scan the adjacent PU of time domain and construct a MV predicted vector candidate list. encoder arranges from candidate according to being coded of MV at present
Table is selected best predicted motion to being and encoding relevant parameter information..MV difference is coded of bit stream the most not
With.
As in figure 2 it is shown, in certain embodiments, arranging merge pattern is 3, i.e. merge pattern correspondence movable information is waited
Select the movable information of candidate in list be number be 3, i.e. merge pattern output 3 candidate MV；Arranging amvp pattern is 1,
In the movable information candidate list that i.e. amvp pattern is corresponding, the movable information number of candidate is 1, i.e. amvp pattern 1 MV of output；
Now the Effective judgement process of inter prediction MV is as in figure 2 it is shown, the pattern that wherein inter prediction obtains represents with mx in the drawings,
X represents sequence number, i.e. m0 represents first merge pattern, and by that analogy, in figure, m1 is invalid, and i.e. corresponding MV is invalid, and m1/2 represents
M1, m2 are invalid.The most corresponding candidate MV of m0, m1, m2；If the pattern of correspondence is invalid, then corresponding mv is the most invalid.Passing through
After interframe as shown in Figure 2 merges pretreatment, it exports merging patterns information, its processing procedure according to effective number of modes
As shown in Figure 3.Merging patterns information is used for being sent to mode adjudging, using rate-distortion optimization (RDO) algoritic module to calculate
Processing, merging patterns information includes the pooling information of MV, MV information.
The merging of motion vector herein, refers to identical motion vector and merges, the nonjoinder differed；Example
Such as MV0, MV1, MV2, MVamvp, if MV0=MV1, then the motion vector after merging is: MV0, MV2, MVamvp, motion vector
Pooling information comprises the motion vector after merging, and the merging mode of vector.
Mode adjudging refers to judge optimum coding mode, i.e. according to the fortune after above-mentioned merging according to the motion vector after merging
Dynamic vector, it is judged that in frame, still interframe is optimum, and that pattern of interframe is optimum.The brief job description of mode decision module:
Schema encoding process include inter motion compensation, convert, quantify, inverse quantization, anti-change, residual error is estimated.
In Fig. 4, merge0 represents and represents MVmerge0, and mc, T, Q, IQ, IT, SSE represent inter motion compensation, change respectively
Change, quantify, inverse quantization, anti-change, residual error estimates, i.e. merge0mc is MVmerge0Carry out inter motion compensation computing, amvp mc
Refer to that MV amvp carries out inter motion compensation computing, by that analogy, the 1-34 express time axle of top, mode in Fig. 4
Estimation intermediate scheme is estimated.In the above-described embodiments, if 4 patterns are all effective, then 4 corresponding MV are all effective, as
Shown in Fig. 4, whole flow processing process needs to take the hardware resource of 4 groups of inter-frame forecast mode consumption and flow time is 27
Unit interval；If MVmerge0=MVmerge1=MVmerge2=MVamvp, it is only necessary to process one group of MV information and be used for doing interframe movement benefit
Repay, convert, quantify, inverse quantization, anti-change, residual error estimation etc. calculates, and its time consumed is 12 unit interval.Therefore may be used
To understand after carrying out motion vector merging, the flow time that corresponding merging is entered can be saved.Thus reduce the method pair
The chip answered can be relative reduction clock frequency thus reduce power consumption；In particular with the raising of film source resolution, decoding effect
The raising of rate, to meeting 4kx2k@30FPS, 1080p@120FPS efficient SOC coding and wearable low-power consumption demand, has great
Meaning；In one embodiment, the encoding-decoding efficiency that motion vector merges is added up as shown in Figure 5.
It is understood that arrange merge number of modes according to power consumption demand and chip computing capability, to meet correspondence
Product demand.
Encoder IP for realize inter-frame prediction method that above-mentioned H265 encode is also provided herein, as shown in Figure 6: include
Motion vector merges module, interframe interpolation computing module, mode decision module and bit rate distortion computation module；
Motion vector merges module and is used for receiving use merge pattern, amvp pattern and estimation of motion vectors calculating output
Motion vector, it is judged that whether the motion vector received comprise identical motion vector, and identical motion vector closed
And, and the merging mode information of motion vector is sent to mode adjudging and bit rate distortion computation module；
Interframe interpolation computing module is for carrying out interframe interpolation calculating according to the motion vector after merging, it is thus achieved that video is compiled
Code；
Mode decision module is for judging optimum coding mode according to the motion vector after merging.
Mode decision module, processes the motion vector residual error of Inter prediction module input, and current block obtains from prime
The block contextual information arrived, the residual information corresponding with pattern does the judgement that pattern is optimum；
Mode adjudging overall equation is as follows:
J (mode)=SSE+ λ * R (ref, mode, mv, residual)
In this formula, SSE refer to reconstructed block and source images squared difference and；λ is Lagrange multiplier；R is this mould
The actual code stream of macroblock coding under formula, including the bit summation to reference frame, pattern, motion vector, residual error etc..If in frame
Pattern, the most only R (mode, residual).
Above formula is to the interframe of present encoding or intra block, and the various patterns of correspondence are adjudicated, and takes J value minimum
The most optimal decision pattern of pattern.
The brief job description of interframe interpolation module:
Interframe interpolation module, processes the motion vector information of Inter prediction module input, divides including integer components and decimal
The motion vector information of amount；Only comprise the pixel of integer due to reference frame image, therefore have the movable information reference of fractional component
Time, need the moving mass motion compensation near integer position；Component motion information for only integer, it is not necessary to make a point picture
The motion compensation of element, directly finds the moving mass prediction Pixel Information as present frame current block of integer position；If comprised
Motion vector i.e. have integer to have again the motion vector information of decimal, then need to enter according to decimal information near integer position
Row sub-pixel motion compensation obtains the prediction Pixel Information of present frame current block；
In certain embodiments, also including main control module, main control module is used for arranging merge number of modes.Such as Fig. 2
Shown in, in certain embodiments, arranging merge pattern is 3, i.e. candidate in merge pattern correspondence movable information candidate list
Movable information be number be 3, i.e. merge pattern output 3 candidate MV；Arranging amvp pattern is 1, i.e. amvp pattern pair
In the movable information candidate list answered, the movable information number of candidate is 1, i.e. amvp pattern 1 MV of output；Now inter prediction
The Effective judgement process of MV is as in figure 2 it is shown, the pattern that wherein inter prediction obtains represents with mx in the drawings, and x represents sequence number, i.e.
M0 represents first merge pattern, and by that analogy, in figure, m1 is invalid, and i.e. corresponding MV is invalid, and m1/2 represents that m1, m2 are invalid.
The most corresponding candidate MV of m0, m1, m2；If the pattern of correspondence is invalid, then corresponding mv is the most invalid.Through as shown in Figure 2
Interframe merge after pretreatment, it exports merging patterns information according to effective number of modes, and its processing procedure is as shown in Figure 3.
Merging patterns information is used for being sent to mode adjudging, using rate-distortion optimization (RDO) algoritic module to carry out calculating process, merges mould
Formula information includes the pooling information of MV, MV information.
The merging of motion vector herein, refers to identical motion vector and merges, the nonjoinder differed；Example
Such as MV0, MV1, MV2, MVamvp, if MV0=MV1, then the motion vector after merging is: MV0, MV2, MVamvp.
It should be noted that in this article, the relational terms of such as first and second or the like is used merely to a reality
Body or operation separate with another entity or operating space, and deposit between not necessarily requiring or imply these entities or operating
Relation or order in any this reality.And, term " includes ", " comprising " or its any other variant are intended to
Comprising of nonexcludability, so that include that the process of a series of key element, method, article or terminal unit not only include those
Key element, but also include other key elements being not expressly set out, or also include for this process, method, article or end
The key element that end equipment is intrinsic.In the case of there is no more restriction, statement " including ... " or " comprising ... " limit
Key element, it is not excluded that there is also other key element in including the process of described key element, method, article or terminal unit.This
Outward, in this article, " be more than ", " being less than ", " exceeding " etc. are interpreted as not including this number；More than " ", " below ", " within " etc. understand
For including this number.
Those skilled in the art are it should be appreciated that the various embodiments described above can be provided as method, device or computer program product
Product.These embodiments can use complete hardware embodiment, complete software implementation or combine software and hardware in terms of embodiment
Form.All or part of step in the method that the various embodiments described above relate to can instruct relevant hardware by program
Completing, described program can be stored in the storage medium that computer equipment can read, and is used for performing the various embodiments described above side
All or part of step described in method.Described computer equipment, includes but not limited to: personal computer, server, general-purpose computations
Machine, special-purpose computer, the network equipment, embedded device, programmable device, intelligent mobile terminal, intelligent home device, Wearable
Smart machine, vehicle intelligent equipment etc.；Described storage medium, includes but not limited to: RAM, ROM, magnetic disc, tape, CD, sudden strain of a muscle
Deposit, the storage of USB flash disk, portable hard drive, storage card, memory stick, the webserver, network cloud storage etc..
The various embodiments described above are with reference to according to the method described in embodiment, equipment (system) and computer program
Flow chart and/or block diagram describe.It should be understood that can every by computer program instructions flowchart and/or block diagram
Flow process in one flow process and/or square frame and flow chart and/or block diagram and/or the combination of square frame.These computers can be provided
Programmed instruction to the processor of computer equipment to produce a machine so that the finger performed by the processor of computer equipment
Order produces for realizing specifying in one flow process of flow chart or multiple flow process and/or one square frame of block diagram or multiple square frame
The device of function.
These computer program instructions may be alternatively stored in the computer that computer equipment can be guided to work in a specific way and set
In standby readable memory so that the instruction being stored in this computer equipment readable memory produces the manufacture including command device
Product, this command device realizes at one flow process of flow chart or multiple flow process and/or one square frame of block diagram or multiple square frame middle finger
Fixed function.
These computer program instructions also can be loaded on computer equipment so that performs a series of on a computing device
Operating procedure is to produce computer implemented process, thus the instruction performed on a computing device provides for realizing in flow process
The step of the function specified in one flow process of figure or multiple flow process and/or one square frame of block diagram or multiple square frame.
Although being described the various embodiments described above, but those skilled in the art once know basic wound
The property made concept, then can make other change and amendment to these embodiments, so the foregoing is only embodiments of the invention,
Not thereby the scope of patent protection of the present invention, every equivalent structure utilizing description of the invention and accompanying drawing content to be made are limited
Or equivalence flow process conversion, or directly or indirectly it is used in other relevant technical fields, the most in like manner it is included in the patent of the present invention
Within protection domain.
Claims (6)
1. inter-frame prediction method based on H265 coding, it is characterised in that further comprised the steps of: before interframe interpolation calculates
At least 1 motion vector according to candidate, it is judged that the most whether comprise identical motion vector, and identical motion is vowed
Amount merge, will merge after motion vector be used for interframe interpolation calculate, and will merge after motion vector and the merging side of vector
Formula information is used for mode adjudging and bit rate distortion computation.
Inter-frame prediction method based on H265 coding the most according to claim 1, it is characterised in that merge pattern is set
Number.
Inter-frame prediction method based on H265 coding the most according to claim 1, it is characterised in that " judge it in step
In whether comprise identical motion vector ", also include the effectiveness judging merge pattern.
4. for realizing the encoder IP of the inter-frame prediction method of H265 coding, it is characterised in that include that motion vector merges mould
Block, interframe interpolation computing module, mode decision module and bit rate distortion computation module；
Motion vector merges module and uses merge pattern, amvp pattern and estimation of motion vectors to export after processing for receiving
Motion vector, it is judged that whether comprise identical motion vector in the motion vector received, and identical motion vector is merged,
And the pooling information of motion vector is sent to mode adjudging and bit rate distortion computation module；
Interframe interpolation computing module is for carrying out interframe interpolation calculating according to the motion vector after merging；
Mode decision module is for judging optimum coding mode according to the motion vector after merging.
The encoder IP of the inter-frame prediction method for realizing H265 coding the most according to claim 4, it is characterised in that
Also including main control module, main control module is used for arranging merge number of modes.
The encoder IP of the inter-frame prediction method for realizing H265 coding the most according to claim 4, it is characterised in that
Described motion vector merges module and is additionally operable to judge the effectiveness of merge pattern.
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| US20060023790A1 (en) * | 2004-07-30 | 2006-02-02 | Industrial Technology Research Institute | Method for processing motion information |
| CN101014129A (en) * | 2007-03-06 | 2007-08-08 | 孟智平 | Video data compression method |
| KR20120138426A (en) * | 2011-06-15 | 2012-12-26 | 광운대학교 산학협력단 | Signaling apparatus and method of interleaving advanced motion vector prediction |
| CN103609121A (en) * | 2011-06-20 | 2014-02-26 | 高通股份有限公司 | Unified merge mode and adaptive motion vector prediction mode candidates selection |
| CN104247428A (en) * | 2012-04-06 | 2014-12-24 | 索尼公司 | Decoder and decoding method, as well as encoder and encoding method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20060023790A1 (en) * | 2004-07-30 | 2006-02-02 | Industrial Technology Research Institute | Method for processing motion information |
| CN101014129A (en) * | 2007-03-06 | 2007-08-08 | 孟智平 | Video data compression method |
| KR20120138426A (en) * | 2011-06-15 | 2012-12-26 | 광운대학교 산학협력단 | Signaling apparatus and method of interleaving advanced motion vector prediction |
| CN103609121A (en) * | 2011-06-20 | 2014-02-26 | 高通股份有限公司 | Unified merge mode and adaptive motion vector prediction mode candidates selection |
| CN104247428A (en) * | 2012-04-06 | 2014-12-24 | 索尼公司 | Decoder and decoding method, as well as encoder and encoding method |
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Address after: 350003 building, No. 89, software Avenue, Gulou District, Fujian, Fuzhou 18, China Patentee after: Ruixin Microelectronics Co., Ltd Address before: 350003 building, No. 89, software Avenue, Gulou District, Fujian, Fuzhou 18, China Patentee before: Fuzhou Rockchips Electronics Co.,Ltd. |