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Image or video coding method based on predistortion and training filter

A video coding and filter technology, applied in image communication, digital video signal modification, electrical components, etc., to improve the quality of decoded images or videos, avoid ringing effects, and reduce bit rates

Inactive Publication Date: 2015-05-27
TIANJIN UNIV
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Problems solved by technology

No combination of these two methods has been found in the field of image and video coding

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  • Image or video coding method based on predistortion and training filter

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Embodiment Construction

[0024] The amount of multimedia data is increasing, and consumers have higher and higher requirements for multimedia quality. Therefore, it is necessary to study an algorithm that can further improve the coding efficiency and ensure a certain coding quality.

[0025] Pre-distortion fuzzing at the encoding end can reduce the amount of data to be encoded and improve encoding efficiency, but poses a challenge to the deblurring function of the reconstruction module at the decoding end. If the transmission blur function will increase the stream overhead, and the traditional deconvolution image deblurring algorithm will cause ringing effect. Therefore, it is of great significance to develop a predistortion-deblurring scheme suitable for video coding.

[0026] The present invention proposes an image or video coding scheme based on predistortion and training filters. This solution performs pre-distortion (fuzzification) processing on the image or video at the encoding end, and does ...

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Abstract

The invention relates to an image or video compression coding and provides an image or video coding method based on predistortion and filter training, and the method not only can improve the coding efficiency but also avoids a ringing effect so as to guarantee the image quality. The image or video coding method based on predistortion and filter training comprises the following steps: through a low-pass filter, performing predistortion fuzzification treatment on a sequence of each frame of video before coding; at a decoding end, adopting a large amount of images with various image structures to form a training sample library at first; then, performing offline training on a filter set by the classified images; when reconstructing fuzzy images at the decoding end, classifying the image structures by adopting a combined method of ADRC (adaptive dynamic range coding) and the other classification method, finding corresponding optimal filter coefficients in a lookup table according to a classification result, forming optimal filters, performing defuzzification respectively based on image structure types, and finally performing synthesis to obtain defuzzified images. The image or video coding method is mainly applied to image or video compression coding.

Description

technical field [0001] The present invention relates to image and video compression coding, in particular to an image or video coding method based on pre-distortion and training filters. Background technique [0002] With the development of electronic equipment, the Internet and the continuous improvement of people's needs, digital images and video data are being generated and disseminated at an extremely fast speed, and high-definition or ultra-high-definition video has become a development trend. For example, 3D, HDR (high dynamic range), 4K or 8K video, etc., storing or transmitting these video data requires efficient compression methods to reduce the amount of data and ensure the quality of the image. [0003] Mainstream video compression standards mainly include MPEG-2, MPEG-4, H.264 / AVC, HEVC, etc. These compression coding standards use the spatial correlation and temporal correlation of the video sequence to remove a large amount of redundant information in the video...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/117H04N19/147H04N19/13
Inventor 段绿茵徐岩雷志春
Owner TIANJIN UNIV
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