Intra Prediction Reference Point Preprocessing Method for High Efficiency Video Coding
A high-efficiency video coding and intra-frame prediction technology, applied in the field of image processing, can solve the problems of wasting resources and consuming a lot of time, and achieve the effects of saving resources, reducing delay, and improving throughput
Active Publication Date: 2018-11-20
XIDIAN UNIV
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[0005] The purpose of the present invention is to propose a video coding intra-frame prediction reference point preprocessing method to solve the problem of wasting a lot of resources and wasting the entire reconstruction image when preprocessing the reference sample points in the existing high-efficiency video coding HEVC standard. Time consuming problem, easy to implement in hardware
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[0029] Reference figure 1 , The implementation steps of the present invention are as follows:
[0030] Step 1: Initialization.
[0031] Create three shift registers R1, R2, R3, five key point storage units K1, K2, K3, K4, K5, i result storage units B_o[i] and flag bit flag[i], of which 0 <=i <=4N, N is the number of pixels included in the PU side length of the current prediction unit;
[0032] Three shift registers R1, R2, R3 are used to store reference points, and five key point storage units K1, K2, K3, K4, K5 are used to store the 0th, Nth, 2N, and 3Nth , The 4Nth reference point, flag[i] is used to mark the availability of the current prediction unit PU reference point, and the result storage unit B_o[i] is used to store the smoothed reference point.
[0033] Step 2: Update the buffer.
[0034] Store the rightmost column of reference point reconstruction values in the maximum coding unit LCU on the left side of the current maximum coding unit LCU in the left buffer; buffer the r...
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The invention discloses an intra-frame prediction reference point preprocessing method for high efficiency video coding. The method is mainly used for solving the problems in the prior art that the intra-frame prediction reference point preprocessing clock latency and hardware resource utilization rate are high and the throughput rate is low. The technical solution comprises following steps: 1), initializing related storage units; 2), updating buffer areas and assigning the flags corresponding to reference points; 3), preparing five key reference points; 4), successively storing the reference points in a register; selecting an accurate smoothing method to smooth the reference points according to the five key reference points and the size of a current prediction unit PC; and 5), updating shift registers until finishing processing the reference points. The method of the invention is advantaged by low delay, high data throughput rate and low resource utilization rate and can be applied to video coding.
Description
Technical field [0001] The present invention belongs to the technical field of image processing, and particularly relates to a pre-processing method for intra-frame prediction reference points, which can be used for video coding. Background technique [0002] High-efficiency video coding HEVC, as a new generation of video coding standard, was jointly formulated by the Video Coding Group (JCT-VC, Joint Collaborative Team on Video Coding) in 2013. The HEVC standard is mainly for the compression of high-definition and ultra-high-definition resolution video. Compared with the excellent performance of H.264 / AVC, the coding efficiency is doubled. [0003] The prediction process occupies an extremely important role in HEVC. Prediction in HEVC is divided into two types: intra prediction and inter prediction. Intra prediction is to predict and encode the next pixel block to be encoded based on the already encoded pixel block to remove the corresponding spatial redundancy information; inter...
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IPC IPC(8): H04N19/11H04N19/157H04N19/176H04N19/46H04N19/503H04N19/593
CPCH04N19/11H04N19/157H04N19/176H04N19/46H04N19/503H04N19/593
Inventor 雷杰王绍虎陈奕彤赵静闫旭伟
Owner XIDIAN UNIV