Video encoding method and device

A video decoding and video technology, applied in the field of video decoding methods and devices, can solve the problem of inability to accurately control the computational complexity of the decoder, and achieve acceptable results.

Active Publication Date: 2009-01-07
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the technical problem that the computational complexity of the decoder cannot be accurately controlled, thereby providing a video decoding device and method that can accurately control the decoding time to be reduced to a certain percentage without hierarchical processing, while maintaining image quality acceptable

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  • Video encoding method and device
  • Video encoding method and device

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Embodiment Construction

[0049] In order to make the purpose, technical solution and advantages of the present invention clearer, a video decoder according to an embodiment of the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation process described here is only used to explain the present invention, and is not intended to limit the present invention.

[0050] The present invention is applicable to various video standards adopting hybrid differential pulse code modulation / discrete cosine transform (hybridDPCM / DCT), including H.263, H.264, MPEG-4, AVS and the like. In the specific embodiments introduced in the present invention, the AVS standard is taken as an example.

[0051] A decoding order of the AVS standard such as:

[0052] I P B B P B B I B B P B B

[0053] As shown above, frames are divided into three categories, intra-frame decoded images (I frames), forward inter-frame decoded i...

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Abstract

The invention provides a video decoding method which includes the following steps: 1) according to a preset time percentage K which is required for reducing, a processing level of loop wave filtering is determined; 2) a residuals matrix of a video macroblock is calculated; 3) according to the video macroblock after decoding, a predicted value matrix is calculated; 4) according to the processing level of the loop wave filtering, the loop wave filtering is carried out on the sum of the residuals matrix and the predicted value matrix. By adopting the invention, a percentage K is given and the video decoding method can ensure that the calculating time is reduced by K of the former time and image quality which is maintained can be accepted.

Description

technical field [0001] The present invention relates to the processing of digital video signals, in particular, the present invention relates to a video decoding method and device. Background technique [0002] Mobile communication technology is becoming more and more developed, and mobile terminal devices such as mobile phones and PDAs are more and more advanced in video application technology. After the video is sent or downloaded to the mobile terminal, it will be decoded and played on the mobile terminal. While the video quality is improved, the computational complexity in the video decoding process is also greatly increased, which increases the computational load of the processor of the mobile terminal, and the power consumed in the decoding process also increases accordingly. The battery technology of mobile devices is constantly developing, but because the growth rate of battery power cannot offset the energy consumption caused by the increasingly complex and rich ap...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/36H04N7/50H04N19/117H04N19/126H04N19/176
Inventor 陈磊陈益强纪雯张绘国
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI
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