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Method for realizing video compression and decompression

A video compression and decompression technology, applied in digital video signal modification, television, image data processing, etc., can solve the problems of not using parallel processors, not making full use of computing resources, reducing the amount of integer transformation operations, and reducing CPU usage. occupancy, ensure normal operation, and reduce the effect of processing time

Inactive Publication Date: 2006-10-04
TENCENT TECH (SHENZHEN) CO LTD
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Problems solved by technology

[0005] But the above-mentioned integer transformation method for 4 * 4 pixel blocks does not make full use of existing computing resources, for example, when carrying out integer transformation in PC and digital signal processor (DSP), the parallel processor in PC and DSP is not utilized advantage, so there is no reduction in the amount of calculations for integer transformations to the greatest extent

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  • Method for realizing video compression and decompression
  • Method for realizing video compression and decompression
  • Method for realizing video compression and decompression

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Embodiment Construction

[0042] Because PC and DSP etc. are provided with the processor that is used to carry out floating-point calculation, and this processor can be used for parallel operation, such processor is called parallel processor, so the scheme of the present invention mainly utilizes this parallel processor to carry out Integer transformation and inverse transformation, so as to realize video compression and decompression.

[0043] The scheme of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0044] First, the 2D integer transform for 4x4 pixel blocks is described in detail.

[0045] Suppose a 4×4 pixel block is a matrix X, and the matrix X is x 00 x 01 x 02 x...

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Abstract

The invention discloses a method for achieving the visual compression, which first line fixes the compressing image element block corresponding matrix in the register of the concurrent processor which dose level transformation to the matrix to obtain the new matrix; then it dose vertical transformation to obtain the matrix information after image element block compression. It also discloses two methods for achieving video unpack.

Description

technical field [0001] The present invention relates to the technical field of video compression, more specifically to a method for realizing video compression and decompression in video compression. Background technique [0002] Currently, the latest video compression standards H.26L and H.264 are based on integer transformation algorithms. Since the integer transformation algorithm is based on floating-point operations, it is not suitable for real-time operation requirements, so it cannot be directly applied in the field of video coding. In order to apply the integer transformation algorithm, a key step is to convert real numbers into integers for operation, and the conversion from real numbers to integers has been realized so far. [0003] Most of the current image / video coding standards use 8×8 integer transformation. In order to obtain higher coding efficiency, H.264 chooses a smaller data unit, that is, a 4×4 pixel block. For the integer transformation algorithm of 4...

Claims

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Application Information

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IPC IPC(8): H04N7/26G06T9/00H04N19/436
Inventor 梁柱
Owner TENCENT TECH (SHENZHEN) CO LTD
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