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Video Transform Coding Method Based on Block Search and Orthogonal Matching Pursuit

A technology of orthogonal matching tracking and video transformation, which is applied in the field of video coding, can solve the problems of high KLT computational complexity and slow video decoding calculation speed, and achieve the effects of easy decoding, good energy accumulation, and improved compression efficiency

Active Publication Date: 2018-08-03
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

However, the problem with this method is that the computational complexity of KLT is very high, which may cause slow video decoding calculation speed and cannot meet the needs of practical applications.

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  • Video Transform Coding Method Based on Block Search and Orthogonal Matching Pursuit

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Embodiment Construction

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0045] figure 1 A flow chart of a video transform coding method based on block search and orthogonal matching pursuit provided by an embodiment of the present invention. like figure 1 As shown, it mainly includes the following steps:

[0046] Step 11. Perform motion estimation on the current coding block to obtain a temporal prediction value, and obtain a residual of the current coding block based on the temporal prediction value.

[0047] Step ...

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Abstract

The invention discloses a block search and orthogonal matching pursuit based video converting and encoding method. The block search and orthogonal matching pursuit based video converting and encoding method comprises the steps that motion estimation is conducted on current encoding blocks to obtain time prediction values, and residual errors of the current encoding blocks are obtained based on the time prediction values; best matched blocks of the current encoding blocks are searched based on space neighborhoods and time prediction of the current encoding blocks, and a dictionary for orthogonal matching pursuit OMP transformation is obtained by utilizing a clustering algorithm; OMP transformation is conducted on the dictionary for the OMP transformation by using the residual errors of the current encoding blocks to obtain transformation coefficients, and video transforming codes are completed. By the adoption of the method, good energy clustering degree can be reached, and accordingly the compression efficiency can be improved. In addition, the computation complexity of the transformation is lower than that of signal dependent transformation, and convenience is brought to decoding.

Description

technical field [0001] The invention relates to the technical field of video coding, in particular to a video transform coding method based on block search and orthogonal matching pursuit. Background technique [0002] In recent years, with the popularity of high-definition and ultra-high-definition video, the amount of original video data has increased dramatically, which has brought enormous pressure to storage and transmission. How to further improve the compression efficiency of video coding is a crucial issue. [0003] Currently widely used video coding standards, such as H.264 and HEVC (High Efficiency Video Coding, high-performance video coding), are based on the hybrid video coding framework, generally composed of the following parts, prediction (Prediction), transformation (Transform), quantization (Quantization) and Entropy Coding (Entropy Coding). Among them, the transformation technology is used to process the prediction residual of the current coding block, so...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/176H04N19/61H04N19/625H04N19/52
CPCH04N19/176H04N19/52H04N19/61H04N19/625
Inventor 吴枫宋锐李厚强刘东兰翠玲
Owner UNIV OF SCI & TECH OF CHINA
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