Method, device and system for encoding and decoding data

A coding and data technology, applied in the fields of digital video signal modification, image communication, electrical components, etc., can solve the problems of low data compression rate and low probability distribution accuracy, and achieve the effect of high data compression rate

Active Publication Date: 2022-05-20
HANGZHOU HIKVISION DIGITAL TECH
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Problems solved by technology

[0005] In the above process, the mean value in the probability distribution is directly set to 0, but the mean value in the actual situation is probably not 0, and the set mean value does not match the actual situation, which will lead to low accuracy of the probability distribution, and the obtained data Compression is also lower

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  • Method, device and system for encoding and decoding data
  • Method, device and system for encoding and decoding data
  • Method, device and system for encoding and decoding data

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[0119] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.

[0120] Embodiments of the present disclosure provide a method for encoding data and a method for decoding data. The entropy encoding method can be implemented by an encoding end, and the entropy decoding method can be implemented by a decoding end. Such as figure 1 As shown in the figure above, the encoding end can include a transformation module, a quantization module, an entropy cod...

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Abstract

The disclosure relates to a method, device and system for encoding and decoding data, and belongs to the technical field of data compression. The method includes: inputting the quantized transformation coefficient and the corresponding quantization step into the first processing network of the entropy model, and obtaining the first probability distribution parameter reflecting the probability distribution of the quantized variation coefficient output by the first processing network; Determine the probability distribution of the quantized transform coefficients according to the first probability distribution parameter and the second probability distribution parameter; perform entropy coding processing on the quantized transform coefficients according to the probability distribution to obtain an entropy coding result. By adopting the present disclosure, according to the more accurate first probability distribution parameter and the second probability distribution parameter, when entropy coding is performed on quantized transform coefficients, the obtained data compression rate is higher.

Description

technical field [0001] The present disclosure relates to the technical field of data compression, in particular to a method, device and system for encoding and decoding data. Background technique [0002] Before data such as video data is transmitted or stored, the video data needs to be encoded to compress the video data. The compressed video data has a smaller data volume, which is more conducive to video data transmission and storage. Encoding can be performed in units of images in video data. First, the image can be transformed to obtain transformation coefficients. Then, the transformation coefficients can be quantized to obtain quantized transformation coefficients. Finally, the quantized transformation coefficients can be determined. Probability distribution, based on the probability distribution, entropy coding is performed on the quantized transform coefficients to obtain a final image code stream. Wherein, the quantized transform coefficient may be a multi-dimensi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/12H04N19/124H04N19/13H04N19/149H04N19/30H04N19/91
CPCH04N19/124H04N19/12H04N19/13H04N19/149H04N19/395H04N19/91
Inventor 林超逸
Owner HANGZHOU HIKVISION DIGITAL TECH
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