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Self-adaptive interpolation process method and coding/decoding module

A technology of interpolation processing and encoding mode, applied in the multimedia field, can solve problems such as poor prediction image accuracy, achieve the effects of reducing data, improving image quality, and reducing energy

Active Publication Date: 2007-09-26
TENCENT TECH (SHENZHEN) CO LTD
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Problems solved by technology

[0033] The present invention provides an adaptive interpolation processing method and a codec module to solve the problem of poor prediction image accuracy in the prior art when using a fixed interpolation filter for interpolation

Method used

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  • Self-adaptive interpolation process method and coding/decoding module
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  • Self-adaptive interpolation process method and coding/decoding module

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Embodiment Construction

[0064] In the process of video encoding, the setting of the quantization factor directly affects the size of the encoding bit rate. A smaller quantization factor can better preserve the information of the image, and the reconstructed image is more refined, so the code stream output by the encoder is larger, while A larger quantization factor discards more image information, and the reconstructed image is rougher, so the output code stream is smaller.

[0065] At a high bit rate, the reconstructed image is finer due to the selection of a smaller quantization factor; at a low bit rate, due to the selection of a larger quantization factor, the reconstructed image is rough and the fine The degree affects the interpolation performance of different filters.

[0066] The present invention proposes a method to select sub-pixel interpolation in motion compensation prediction according to the size of the quantization factor QP value of the currently encoded video image, that is, the enc...

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Abstract

The related adaptive interpolating method comprise: based on contrast performance of sub-pixel interpolated image by set-quantized factor image of different sub-pixel interpolation filter group, obtaining the matching relation between quantized factor and optimal sub-pixel interpolation filter group, and storing the relation in to the coding end and decoding end; both the coding and decoding ends select the corresponding interpolation filter group for interpolation. Wherein, the relative coding / decoding module comprises a storage sub-module, an interpolation sub-module, and a coding / decoding sub-module. This invention improves the predicting and compensating precision on motion image greatly.

Description

technical field [0001] The invention relates to multimedia technology, in particular to an adaptive interpolation processing method and a codec module. Background technique [0002] With the development of multimedia technology and the rapid promotion of multimedia applications, video image compression standards and technologies have received extensive attention. The current video coding standards, H.26x and MPEG-x (MPEG, Motionpicture experts group, motion picture experts group) And the video standards in the AVS (Audio video Standard, audio and video coding standard) standard formulated by the Chinese audio and video codec technology standard working group are all based on the hybrid coding framework. This hybrid coding framework has the following characteristics: [0003] 1. Use predictive coding to remove time-domain redundancy; [0004] 2. Use transform coding to remove spatial redundancy; [0005] 3. Use entropy coding to remove statistical redundancy. [0006] Amo...

Claims

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Application Information

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IPC IPC(8): H04N7/24
Inventor 周建同熊联欢谢清鹏曾鹏鑫林四新
Owner TENCENT TECH (SHENZHEN) CO LTD
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