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Video decoding method and system

A technology of video decoding and video data, which is applied in the field of video decoding methods and systems, can solve problems such as high overhead, and achieve the effect of improving processing speed

Inactive Publication Date: 2011-10-19
FUJITSU LTD
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Switching shaders between different rectangles would be expensive

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  • Video decoding method and system
  • Video decoding method and system

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Embodiment Construction

[0023] Features and exemplary embodiments of various aspects of the invention will be described in detail below. The following description covers numerous specific details in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a clearer understanding of the present invention by showing examples of the present invention. The present invention is by no means limited to any specific configuration and algorithm presented below, but covers any modification, replacement and improvement of related elements, components and algorithms without departing from the spirit of the present invention.

[0024] Since macroblocks (MBs) are processed from left to right and from top to bottom in MPEG-2 video decoding, the x-axis of the coordinate system in the MPEG-2 video decodin...

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Abstract

The invention discloses a video decoding method and a video decoding system. The method comprises the following steps of: performing variable length decoding and reverse scanning on coded video data of a picture by utilizing a central processing unit to acquire the video data of the picture subjected to variable length decoding and reverse scanning; performing reverse quantization, reverse discrete cosine transform, motion compensation and color space transform on the video data of the picture subjected to variable length decoding and reverse scanning by utilizing a programmable graphic processing unit to acquire the video data of the picture subjected to the decoding, wherein the video data of the picture subjected to variable length decoding, reverse quantization and reverse discrete cosine transform comprises a brightness residual value and a chromaticity residual value of each pixel in the picture. The brightness residual value and the chromaticity residual value of any pixel in the picture are subjected to motion compensation according to an equality 1 to acquire a brightness value and a chromaticity value of the pixel, namely the equality 1 as follows: sum=residual + (1.0-MC_flag)*128.0 + MC_flag*prediction (1).

Description

technical field [0001] The present invention relates to the field of image processing, and more particularly relates to a video decoding method and system. Background technique [0002] In traditional desktop or handheld devices, video decoding is usually performed by a central processing unit (CPU). Decoding high-definition (HD) video is very difficult for systems without powerful CPUs. In order to decode HD video, one solution is to add a dedicated video decoding chip in this system, but the cost of this solution is too high; another solution is to set a graphics processing unit (GPU) in this system, which is controlled by GPU to complete part of the decoding task. [0003] Decoding processes suitable to be performed by the GPU include Inverse Quantization (IQ), Inverse Discrete Cosine Transform (IDCT), Motion Compensation (MC), and Color Space Conversion (CSC). This processing is usually done by vertex shaders and fragment shaders. MC processing is the most complex of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/32H04N19/176H04N19/51
Inventor 谭志明白向晖洲镰康
Owner FUJITSU LTD
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