Improved encoding method for enhancement layer in video image layering and encoding

Through the enhanced layer of video image layer coding, the encoding method, including image layering, data rearrangement, Hadamar transform, quantization and coefficient encoding, the problem of insufficient compression rate and encoding quality in the prior art is solved, and higher compression rate and better image quality are achieved.

WO2025061066A1 Publication Date: 2025-03-27CHENGDU SOBEY DIGITAL TECH CO LTD
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Patent Information

Application Number
PCT/CN2024/119542
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-09-20
Filing Date
2024-09-19
Publication Date
2025-03-27

AI Technical Summary

Technical Problem

In the existing video image layered encoding technology, the compression rate and image encoding quality have not yet achieved the best results.

Method used

The enhanced layer improved encoding method using video image layered encoding includes steps such as image layering, enhancement layer data rearrangement, Hadamar transform, quantization and coefficient encoding. The specific steps include performing two-dimensional wavelet transformation on the YUV 4:2:2 image, building an enhancement layer, and further optimizing the encoding through technologies such as rearrangement, Hadamar transform and quantization.

Benefits of technology

Through this method, the compression rate and encoding quality of video images are significantly improved, better picture quality is obtained at the same code rate, and the encoding complexity is reduced, which is suitable for multi-platform implementation.

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Abstract

The present invention relates to the technical field of video image encoding. Disclosed is an improved encoding method for an enhancement layer in video image layering and encoding. The method comprises the following steps: S1, image layering: performing two-dimensional wavelet transform on an inputted YUV 4:2:2 image, so as to decompose the image into four sub-bands, namely, LL, LH, HL and HH, and constructing an enhancement layer on the basis of the four sub-bands, namely, LL, LH, HL and HH, wherein LL represents a low-frequency sub-band, LH represents a high-frequency sub-band in a horizontal direction, HL represents a high-frequency sub-band in a vertical direction, and HH represents a high-frequency sub-band in a diagonal direction; and S2, enhancement layer data re-arrangement: re-arranging the positions of enhancement layer data. The present invention solves the problems in the prior art of a compression rate needing to be further improved, the image encoding quality needing to be further improved, etc.
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