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Spatial prediction method for video coding

A technology of spatial prediction and video coding, applied in the field of spatial prediction of video coding, can solve the problem of high computational complexity, and achieve the effect of ensuring image quality, reducing the amount of calculation, and reducing the computational complexity.

Inactive Publication Date: 2009-10-07
SHENZHEN TEMOBI SCI &TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide a spatial prediction method for video coding, aiming to solve the problem of high computational complexity in the prior art

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  • Spatial prediction method for video coding
  • Spatial prediction method for video coding

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Embodiment Construction

[0040] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0041] According to the predictive coding mode, the present invention respectively adopts the mode selection based on the boundary direction, the mode selection based on the context model, and the mode selection based on the coding mode of the block at the same position in the previous frame image to select the available candidate predictive coding mode, and then calculate the Lagrangian cost function for the candidate predictive coding mode, and select its minimum value as the best predictive coding mode. In this way, while ensuring high judgment accuracy, the calculation complexity is reduced, th...

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Abstract

The invention relates to the field of video image processing and provides a spatial prediction method for video coding. The method comprises the following steps: A. a coder selects out usable candidate predictive coding modes by respectively adopting an edge-direction-based mode selection, a context-model-based mode selection and a mode selection which is based on the coding mode of image same position upper block of the last frame according to a predictive coding mode; B. predictive coding is carried out by the coder according to the candidate predictive coding modes, and the Lagrange cost functions of all the candidate predictive coding modes are calculated; and C. the coder compares the Lagrange cost functions of the candidate predictive coding modes and selects the minimum value as the optimal predictive coding mode. By adopting the method, high-accurate judgment is ensured, and the calculation complexity is reduced simultaneously, thereby the calculation amount is reduced.

Description

technical field [0001] The invention relates to the field of video image processing, more specifically, to a spatial prediction method for video coding. Background technique [0002] In the video compression coding system, the concept of spatial predictive coding is used during intra-frame coding. Since the spatial continuity of each area of ​​the image is different in various directions, for example, at the edge of the object, the direction perpendicular to the edge is discontinuous, while the direction parallel to the edge is generally continuous, so the direction in this direction Each pixel is relatively close in value. The concept of spatial predictive coding is to analyze the spatial correlation of each area of ​​the image, find out the direction with the strongest correlation, and perform predictive coding in this direction, so as to eliminate redundancy to the greatest extent and achieve the greatest compression performance. [0003] Most of the spatial prediction ...

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Application Information

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IPC IPC(8): H04N7/34H04N7/32H04N19/593
CPCH04N19/00175H04N19/00042H04N7/34H04N19/00763H04N7/26026H04N7/26154H04N19/11H04N19/147H04N19/593
Inventor 马国强
Owner SHENZHEN TEMOBI SCI &TECH
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