HEVC Intra Prediction Method Based on SATD Multiplexing
A technology of intra-frame prediction and multiplexing mode, which is applied in the directions of image communication, digital video signal modification, electrical components, etc., can solve the problems of increasing computational complexity of algorithms, unstable compression performance, and difficulty in realization, and achieves reduction of computational complexity , reduce repeated calculations, and reduce the number of calculations
Active Publication Date: 2019-10-11
XIDIAN UNIV
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
This double traversal approach has greatly improved its performance, but at the same time it has greatly increased the computational complexity of the algorithm, reaching 4 times the previous standard
The performance of general platforms is difficult to realize HEVC real-time encoding of ultra-high-definition videos such as 2K and 4K resolutions
Many people have studied various HEVC-based fast algorithms, and some have achieved good results, but most of them are based on the compression of videos that meet certain specific characteristics, and terminate blocks early when the corresponding reference threshold conditions are met. Size or mode traversal, this method artificially filters the mode or block size at the cost of a certain performance loss, not only the application area is too narrow, but also the compression performance is unstable for different video sequences
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0039] refer to Figure 4 , the implementation steps of the present invention are as follows:
[0040] Step 1: Initialization.
[0041] Create four 256x35 two-dimensional arrays MEM8, MEM16, MEM32, and MEM64. These four two-dimensional arrays correspond to 256 4x4 blocks under the 8x8, 16x16, 32x32, and 64x64 layers in a CTU. Multiplexing information, the data in each array member is 0 or 1, 1 means that the prediction result of the 4x4 small block in this mode can be multiplexed, and 0 means that it cannot be multiplexed;
[0042] Create 5 one-dimensional arrays COST4, COST8, COST16, COST32 and COST64 with 256 array members to save the calculated SATD results of 256 4x4 blocks at different depths;
[0043] Create four variables R1, R2, R3 and R4 to save the current mode reusable information of the current 4x4 block read from the four two-dimensional arrays MEM8, MEM16, MEM32 and MEM64.
[0044] Step 2: Cutting and numbering of CTUs.
[0045] Divide the 64x64 CTU with 4x4 ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a HEVC intra-frame prediction method based on SATD reuse. The scheme is as follows: 1) establishing a cached variable and array; 2) numbering 4*4 block in a CTU, computing a reusable mode number of the block at the 8*8 layer, the 16*16 layer, the 32*32 layer and the 64*64 layer; 4) traversing all 4*4 blocks in the CTU to compute the reusable mode numbers thereof; 5) computing the sum of absolute transformed difference of the 4*4 block at the non-reusable modes of 4*4 layer, the 8*8 layer, the 16*16 layer, the 32*32 layer and the 64*64 layer; 6) acquiring the reusability of the current mode at the 8*8 layer, the 16*16 layer, the 32*32 layer and the 64*64 layer; 7) storing the sum of the absolute transformed difference of the current mode to a two-dimensional array corresponding to the reusable layer; and 10) entering the next traversing or ending the intra-frame prediction. The intra-frame prediction method disclosed by the invention is low in coding complexity, high in compression stability, and can be used for simplification computation of a coarse selection module.
Description
technical field [0001] The invention belongs to the technical field of video compression coding, in particular to an intra-frame predictive coding method, which can be used for simplified calculation of rough selection modules. Background technique [0002] High Efficiency Video Coding (HEVC), as a new generation video coding standard, was formulated by Joint Video Coding JCT-VC in 2013. The HEVC standard is mainly aimed at the compression of high-definition and ultra-high-definition resolution videos. Compared with the previous H.264 / AVC standard, under the same compression effect, the code stream size is only half of the previous one. HEVC is divided into two types: intra-frame coding and inter-frame coding, which are used to remove the spatial and temporal redundancy of the video respectively. Intra-frame coding is the basis of inter-frame coding, plays an extremely important role in HEVC coding, and is also the key to such a large performance improvement. For intra-fra...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/593
Inventor 李云松朱哲何刚
Owner XIDIAN UNIV