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Video coding 16*16 integer transformation method

A 16x16, integer transformation technology, applied in the field of video coding, can solve the problems of irreversible transformation, low calculation accuracy, and complex calculation

Inactive Publication Date: 2012-01-25
深圳市云宙多媒体技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiment of the present invention is to propose a video coding 16x16 integer transformation method, aiming at solving the problem that the DCT transformation matrix in the prior art uses floating-point multiplication and addition, which takes up a lot of hardware resources, and the calculation is complicated and the calculation accuracy is not high. The inverse transformation cannot be completely matched, and the transformation is irreversible

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  • Video coding 16*16 integer transformation method

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Embodiment 1

[0140] Such as figure 1 Shown is a video encoding 16x16 integer transformation method according to Embodiment 1 of the present invention, said method comprising the following steps:

[0141] S101, receiving the 16x16 image residual data X output by the prediction module in the encoder;

[0142] S102, selecting an integer transformation base, and constructing a transformation matrix P;

[0143] A general integer transformation matrix of 16 by 16 is constructed as follows:

[0144] C=[C1 C2], where,

[0145] C 1 = 1 1 1 1 1 1 1 1 k 1 k ...

Embodiment 2

[0163] The following is a video encoding 16x16 integer transformation method in Embodiment 2 of the present invention. In Embodiment 2 of the present invention, [27 28 24 23 19 14 9 5] is selected as the integer transformation base of the 16x16 general integer transformation matrix, and the method includes the following steps :

[0164] S201, receiving the 16x16 image residual data X output by the prediction module in the encoder;

[0165] S202, selecting an integer transformation base, and constructing a transformation matrix P;

[0166] A general integer transformation matrix of 16 by 16 is constructed as follows:

[0167] C=[C1 C2], where,

[0168] C 1 = 1 1 1 1 1 1 1 ...

Embodiment 3

[0243] The following is a video encoding 16x16 integer transformation method in Embodiment 3 of the present invention. Embodiment 3 of the present invention selects [15 13 11 11 5 6 5 1] as the integer transformation base of the 16x16 general integer transformation matrix, and the method includes the following steps :

[0244] S301. Receive 16x16 image residual data X output by a prediction module in an encoder.

[0245] S302, select an integer transformation base, and construct a transformation matrix P;

[0246] A general integer transformation matrix of 16 by 16 is constructed as follows:

[0247] C=[C1 C2], where,

[0248] C 1 = 1 1 1 1 1 1 1 1 ...

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Abstract

The invention discloses a video coding 16*16 integer transformation method. The method comprises the following steps: receiving the 16*16 image residual data X output by a prediction module in an encoder; selecting different integer transformation bases [27 28 24 23 19 14 9 5] or [15 13 11 11 5 6 5 1] to construct a transformation matrix P; constructing a scale matrix PF=ZT*Z according to the transformation matrix P; performing forward transformation on the image residual data X according to Y=PXPT, and adopting corresponding integer transformation calculation methods according to different integer transformation bases; and performing scale processing on the data Y subjected to the 16*16 forward transformation. The transformation method disclosed by the invention has excellent energy concentration performance which is approximate to 16*16 DCT, and can remarkably eliminates the correlation of the video data in the transformation space; the method has low calculation complexity, can be realized through addition and shifting, is easily for hardware implementation, has high operation precision, and prevents mismatch between forward and inverse transformations.

Description

technical field [0001] The invention relates to the technical field of video coding, in particular to a video coding 16x16 integer transformation method. Background technique [0002] A complete video coding system is composed of a series of algorithm modules such as prediction, transformation, quantization, and entropy coding. Among them, intra-frame and inter-frame prediction is to use the correlation of video data in space and time to compress data. The transformation module is to transform the image residual data output by the prediction module from the time domain to another space, so that the energy of the flatly distributed data in the time domain is concentrated in the transformed space, and most of the energy of the data is concentrated in the low frequency area of ​​the space . In the subsequent quantization and entropy coding modules, the transformed data distribution characteristics will be effectively used to further compress the data. Obviously, the transfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/46H04N7/50
CPCH04N19/00478H04N7/30H04N7/26702H04N19/00775H04N19/42H04N19/60
Inventor 徐苏珊
Owner 深圳市云宙多媒体技术有限公司