CN105872564A - Intra-frame prediction mode determination method and system for transcoding from H.264/AVC to H.265/HEVC - Google Patents
Intra-frame prediction mode determination method and system for transcoding from H.264/AVC to H.265/HEVC Download PDFInfo
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- CN105872564A CN105872564A CN201610363865.3A CN201610363865A CN105872564A CN 105872564 A CN105872564 A CN 105872564A CN 201610363865 A CN201610363865 A CN 201610363865A CN 105872564 A CN105872564 A CN 105872564A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
- H04N19/61—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
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- H—ELECTRICITY
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- 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
- H04N19/11—Selection of coding mode or of prediction mode among a plurality of spatial predictive coding modes
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- 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
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- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/40—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using video transcoding, i.e. partial or full decoding of a coded input stream followed by re-encoding of the decoded output stream
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Abstract
The invention discloses an intra-frame prediction mode determination method for transcoding from H.264/AVC to H.265/HEVC. The method comprises steps as follows: judging macroblock segmentation modes of H.265/HEVC requiring for mode determination; finding out intra-frame prediction modes of H.264/AVC macroblocks in corresponding positions according to intra-frame prediction mode information of H.264/AVC in code stream; selecting a group of specific intra-frame prediction modes for rate-distortion calculation according to the intra-frame prediction modes of the found H.264/AVC macroblocks so as to obtain an optimal mode, and utilizing the obtained optimal mode as the intra-frame prediction mode of current H.265/HEVC sub-segmentation. According to the method, the pre-determined macroblock segmentation modes of H.265/HEVC and the intra-frame prediction mode information of H.264/AVC in the code stream are analyzed, the macroblocks and the intra-frame prediction mode information in H.264 code stream are effectively utilized, and the obtained optimal prediction mode is taken as the intra-frame prediction mode of the current H.265/HEVC sub-segmentation, so that the transcoding speed is increased.
Description
Technical field
The present invention relates to digital video decoding, H.264/AVC arrive H.265/HEVC in particular to one
The intra prediction mode determining method of transcoding.
Background technology
Last decade, the universal and ultra high-definition of HD video is watched the appearance of frequency attentively, has been promoted video energetically
The development of encoding and decoding technique, ISO and the ITU Liang great world is organized in 2013 and has formally issued HEVC
New-generation digital video encoding and decoding standard, to adapt to network transmission and the development of high-quality video application.
HEVC is extending further and expanding in H.264 technical foundation, starts draft collection from 2005
Since, by countries in the world hundreds expert's R & D Cooperation, until 2013 by Liang great International Standards Organization
ITU and ISO announces to external world formally becomes video encoding and decoding standard of future generation, lasts for 8 years,
Therebetween through repeatedly revising and perfect.
Video code conversion is to process compression video flowing end to end, and the input/output of transcoder is all compression
Data, the compressed bit stream after transcoding is suitable for the requirement of transmission bandwidth and receiving terminal.
At present, the existing HEVC transcoder that H.264 arrives is at tradition tandem type pixel domain code conversion device
In (Cascade Pixel Domain Transcoder, CPDT), decoder and encoder are separate,
With this type of transcoder carry out H.264 standard to the transcoding of HEVC standard time, first decode H.264 video
Stream, then recompiles, is finally compressed into HEVC video code flow, and its transcoder structure is shown in Fig. 1.
In this transcoder, owing to not utilizing the effective information in H.264 code stream to accelerate HEVC coding
Process, therefore transcoding process is computationally intensive, and transcoding efficiency is restricted.
Summary of the invention
Present invention aim to overcome that above-mentioned the deficiencies in the prior art provide one H.264/AVC to arrive
H.265/HEVC the intra prediction mode determining method of transcoding, the method is predetermined by analysis
H.265/HEVC macroblock partition pattern, and the intra prediction mode H.264/AVC in code stream
Information, effectively utilizes H.264 macro block and intraframe prediction information in code stream, the optimum prediction mould that will draw
Formula is as the current intra prediction mode that H.265/HEVC son divides, thus accelerates the speed of transcoding.
Realize the object of the invention to employed technical scheme comprise that H.264/AVC one arrives and H.265/HEVC turn
The intra prediction mode determining method of code, the method includes:
Judge to need the macroblock partition pattern H.265/HEVC of decision pattern；
According to the intraprediction mode information H.264/AVC in input code flow, find out correspondence position
H.264/AVC the intra prediction mode of macro block；
The intra prediction mode of the described H.264/AVC macro block found out is carried out rate distortion computation, obtains
Optimization model, using the optimization model that obtains as the current infra-frame prediction mould that the most H.265/HEVC son divides
Formula.
In technique scheme, division size as sub-in certain in described H.265/HEVC macro block is more than
16x16, then find out all of infra-frame prediction of all H.264/AVC macro blocks that its correspondence position is covered
Pattern, percent of pass distortion computation goes out pattern optimum in these patterns as current H.265/HEVC son
The intra prediction mode divided；
Division size as sub-in certain in described H.265/HEVC macro block is less than 16x16, then find out its corresponding position
The intra prediction mode of the H.264/AVC macro block put, if this intra prediction mode is DC or Plane,
Then calculating DC, Planner, level, vertical 4 kinds of patterns are compared in percent of pass distortion, find out in optimal frames
The intra prediction mode as the division of current H.265/HEVC son of predictive mode；If this infra-frame prediction
Pattern is not DC or Plane, then choose this pattern and about closest to 4 patterns as candidate
Pattern, candidate pattern described in percent of pass distortion computation, show that optimal prediction modes is as currently
H.265/HEVC the intra prediction mode that son divides.
Additionally, the present invention also provides for a kind of infra-frame prediction H.264/AVC arriving H.265/HEVC transcoding
Mode determining system, this system includes:
H.264/AVC decoder, for decoding the H.264 video code flow of input；
Macroblock partition mode module, needs the macro block H.265/HEVC of decision pattern to divide for judgement
Cut pattern, obtain the positional information of macro block；Then according in the H.264 video code flow of described input
H.264/AVC intraprediction mode information, finds out in the frame of H.264/AVC macro block of correspondence position
Predictive mode；The intra prediction mode of the described H.264/AVC macro block found out is carried out rate distortion computation,
Obtain optimal frames inner estimation mode,
H.265/HEVC encoder, for according to using described optimization model as current the most H.265/HEVC
The intra prediction mode that son divides encodes.
The macroblock partition pattern H.265/HEVC that this method is predetermined by analysis, and code stream
In intraprediction mode information H.264/AVC, be effectively utilized H.264 macro block and frame in code stream
Interior information of forecasting, accelerate the speed of transcoding, it is to avoid prior art is the most encoded
Journey needs to redefine the problem of the Fractionation regimen of each macro block, thus decreases computation complexity,
And can guarantee that high-quality encoding efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing transcoder.
Fig. 2 is H.265/HEVC macroblock partition pattern diagram.
Fig. 3 is macroblock partition pattern diagram H.264/AVC.
Fig. 4 is H.265/HEVC intra prediction mode schematic diagram.
Fig. 5 is H.264/AVC intra prediction mode schematic diagram.
Fig. 6 is the intra prediction mode decision side that H.264/AVC present invention arrives H.265/HEVC transcoding
The flow chart of method.
Fig. 7 is the structural representation of transcoder of the present invention.
Detailed description of the invention
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
Before elaborating technical solution of the present invention, first illustrate defined below:
1, block partition mode H.265/HEVC
In H.265/HEVC, the size of block extend to 64x64 from 16x16 H.264/AVC,
So that the compression of high-resolution video.Meanwhile, have employed more flexibly coding structure to improve volume
Code efficiency, including coding unit (Coding Unit), predicting unit (Predict Unit) and converter unit
(Transform Unit), as shown in Figure 3.
The concept of the macro block during wherein H.264/AVC coding unit is similar to, for the process of coding,
Predicting unit is by the elementary cell of prediction, and converter unit is by the elementary cell of transform and quantization.
The separation of these three unit so that convert, predict and encode each processing links more flexible, also have
The division being beneficial to each link more conforms to the textural characteristics of video image, and beneficially unit more optimizes
Complete respective function.
From the point of view of infra-frame prediction, the division of coding unit has 2Nx2N and NxN both of which, therefore
Sub-division size that may be present is 64x64,32x32,16x16,8x8 and 4x4.
2, macroblock partition pattern H.264/AVC is as shown in Figure 4, divides in frame H.264/AVC
Plant analogy H.265/HEVC few, only 3 kinds patterns, use in intraframe coding H.264/AVC
Macroblock partition and the method for sub-split, each piece can by 16 × 16,8 × 8,4x4 segmentation.
3, infra-frame prediction
Infra-frame prediction is as prediction reference signal with decoded boundary pixel before adjacent on spatial domain
The predictive mode carried out.
3.1, H.265/HEVC intra prediction mode
As shown in Figure 4, H.265/HEVC the block from 4x4 to 32x32 is defined 33 different
The prediction of directivity, additionally defines two non-directional prediction planar and DC patterns.
3.2, H.264/AVC intra prediction mode
As it is shown in figure 5, the infra-frame prediction of 4 × 4 and 8x8 luminance block H.264/AVC has 9 kinds in advance
Survey pattern, and it is respectively arranged with 4 kinds at the predictive mode of 16 × 16 luminance block.
As shown in Figure 6, H.264/AVC the present invention arrives the intra prediction mode of H.265/HEVC transcoding
Determining method, the method includes:
S100, judge to need the macroblock partition pattern H.265/HEVC of decision pattern
In the inventive solutions, first, it is determined that H.265/HEVC certain sub-segmentation is big in macro block
It is little whether more than 16x16, if it is, i.e. this son is divided into 32x32 or 64x64；If it is not,
Then this son is divided into 16x16,8x8 and 4x4.
S200, according to the intraprediction mode information H.264/AVC in code stream, find out correspondence position
The intra prediction mode of H.264/AVC macro block, specifically include:
If certain sub-division is more than 16x16 in S201 H.265/HEVC macro block, then find out its corresponding position
Put all of intra prediction mode of all H.264/AVC macro blocks covered.
If certain sub-division size is not more than 16x16 in S202 H.265/HEVC macro block, then it is right to find out
Answer the intra prediction mode of the H.264/AVC macro block of position.
S300, intra prediction mode to the H.264/AVC macro block found out in previous step carry out rate mistake
True calculating, obtains optimization model, the optimization model obtained is divided as current the most H.265/HEVC son
Intra prediction mode, specific as follows:
S301, for the intra prediction mode found out in step S201, percent of pass distortion computation goes out these
Pattern optimum in pattern is as the current frame mode that H.265/HEVC son divides.
S302, for the intra prediction mode found out in step S202, if this intra prediction mode
DC or Plane, then percent of pass distortion compare calculating DC, Planner, level, vertical etc. 4
The pattern of kind, show that optimization model is as H.265/HEVC intra prediction mode；If it is pre-in this frame
Survey pattern is not DC or Plane, then choose this pattern and the most closest 4 patterns as candidate
Pattern, percent of pass distortion computation show that optimization model is as H.265/HEVC intra prediction mode.
Realize system structure that said method used as it is shown in fig. 7, comprises:
H.264/AVC decoder, for decoding the H.264 video code flow of input.
Macroblock partition mode module, needs the macro block H.265/HEVC of decision pattern to divide for judgement
Cut pattern, obtain the positional information of macro block；Then according in the H.264 video code flow of described input
H.264/AVC intraprediction mode information, finds out in the frame of H.264/AVC macro block of correspondence position
Predictive mode；The intra prediction mode of the described H.264/AVC macro block found out is carried out rate distortion computation,
Obtain optimal frames inner estimation mode.This module realizes above-mentioned steps by software or hardware module
Process in S100～S300.
H.265/HEVC encoder, for according to sub as current .265/HEVC using described optimization model
The intra prediction mode divided encodes.
Claims (3)
1. H.264/AVC arrive an intra prediction mode determining method for H.265/HEVC transcoding, its
It is characterised by, including:
Judge to need the macroblock partition pattern H.265/HEVC of decision pattern；
According to the intraprediction mode information H.264/AVC in input code flow, find out correspondence position
H.264/AVC the intra prediction mode of macro block；
The intra prediction mode of the described H.264/AVC macro block found out is carried out rate distortion computation, obtains
Optimization model, using the optimization model that obtains as the current infra-frame prediction mould that the most H.265/HEVC son divides
Formula.
The most H.264/AVC the infra-frame prediction mould of H.265/HEVC transcoding is arrived
Formula determining method, it is characterised in that:
Division size as sub-in certain in described H.265/HEVC macro block is more than 16x16, then find out its corresponding position
Put all of intra prediction mode of all H.264/AVC macro blocks covered, percent of pass distortion computation
Go out pattern optimum in these patterns as the current intra prediction mode that H.265/HEVC son divides；
Division size as sub-in certain in described H.265/HEVC macro block is less than 16x16, then find out its corresponding position
The intra prediction mode of the H.264/AVC macro block put, if this intra prediction mode is DC or Plane,
Then calculating DC, Planner, level, vertical 4 kinds of patterns are compared in percent of pass distortion, find out in optimal frames
The intra prediction mode as the division of current H.265/HEVC son of predictive mode；If this infra-frame prediction
Pattern is not DC or Plane, then choose this pattern and about closest to 4 patterns as candidate
Pattern, candidate pattern described in percent of pass distortion computation, show that optimal prediction modes is as currently
H.265/HEVC the intra prediction mode that son divides.
3. H.264/AVC arrive an intra prediction mode decision systems for H.265/HEVC transcoding, its
It is characterised by, including:
H.264/AVC decoder, for decoding the H.264 video code flow of input；
Macroblock partition mode module, needs to determine intra prediction mode H.265/HEVC for judgement
Macroblock partition pattern, obtain the positional information of macro block；Then according to the H.264 video of described input
Intraprediction mode information H.264/AVC in code stream, finds out the grandest of correspondence position
The intra prediction mode of block；The intra prediction mode of the described H.264/AVC macro block found out is carried out rate
Distortion computation, obtains optimal frames inner estimation mode,
H.265/HEVC encoder, for according to using described optimization model as current the most H.265/HEVC
The intra prediction mode that son divides encodes.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110720218A (en) * | 2017-06-15 | 2020-01-21 | 高通股份有限公司 | Intra-frame filtering applied with transform processing in video coding |
| CN111541898A (en) * | 2020-05-07 | 2020-08-14 | 广州市百果园信息技术有限公司 | Method, device, server and storage medium for determining coding mode |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248893A (en) * | 2013-05-10 | 2013-08-14 | 四川大学 | Method for quick inter-frame transcoding from H. 264/AVC standard to HEVC standard and transcoder thereof |
| US20140119454A1 (en) * | 2012-10-25 | 2014-05-01 | Magnum Semiconductor, Inc. | Rate-distortion optimizers and optimization techniques including joint optimization of multiple color components |
| CN103796023A (en) * | 2014-03-05 | 2014-05-14 | 武汉拓宝电子***有限公司 | H.265/HEVC transcoding method and transcoder based on H.264/AVC macro block structure and texture |
| CN104038764A (en) * | 2014-06-27 | 2014-09-10 | 华中师范大学 | H.264-to-H.265 video transcoding method and transcoder |
| CN104243997A (en) * | 2014-09-05 | 2014-12-24 | 南京邮电大学 | Method for quality scalable HEVC (high efficiency video coding) |
| CN104539954A (en) * | 2014-12-01 | 2015-04-22 | 上海交通大学 | Cascading method for speeding up high efficiency video coding (HEVC) |
| CN105430418A (en) * | 2015-11-13 | 2016-03-23 | 山东大学 | Method for rapidly transcoding from H.264/AVC to HEVC |
-
2016
- 2016-05-27 CN CN201610363865.3A patent/CN105872564B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140119454A1 (en) * | 2012-10-25 | 2014-05-01 | Magnum Semiconductor, Inc. | Rate-distortion optimizers and optimization techniques including joint optimization of multiple color components |
| CN103248893A (en) * | 2013-05-10 | 2013-08-14 | 四川大学 | Method for quick inter-frame transcoding from H. 264/AVC standard to HEVC standard and transcoder thereof |
| CN103796023A (en) * | 2014-03-05 | 2014-05-14 | 武汉拓宝电子***有限公司 | H.265/HEVC transcoding method and transcoder based on H.264/AVC macro block structure and texture |
| CN104038764A (en) * | 2014-06-27 | 2014-09-10 | 华中师范大学 | H.264-to-H.265 video transcoding method and transcoder |
| CN104243997A (en) * | 2014-09-05 | 2014-12-24 | 南京邮电大学 | Method for quality scalable HEVC (high efficiency video coding) |
| CN104539954A (en) * | 2014-12-01 | 2015-04-22 | 上海交通大学 | Cascading method for speeding up high efficiency video coding (HEVC) |
| CN105430418A (en) * | 2015-11-13 | 2016-03-23 | 山东大学 | Method for rapidly transcoding from H.264/AVC to HEVC |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110720218A (en) * | 2017-06-15 | 2020-01-21 | 高通股份有限公司 | Intra-frame filtering applied with transform processing in video coding |
| CN111541898A (en) * | 2020-05-07 | 2020-08-14 | 广州市百果园信息技术有限公司 | Method, device, server and storage medium for determining coding mode |
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