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A method and device for webp entropy encoding

An entropy coding and coding algorithm technology, applied in image communication, digital video signal modification, electrical components, etc., can solve the problems of slow decoding speed, high algorithm complexity, slow coding speed, etc., to achieve the effect of speed improvement

Active Publication Date: 2020-02-14
ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
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  • Claims
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Problems solved by technology

[0004] However, due to the higher algorithmic complexity of WebP, additional performance overhead is incurred, e.g. 10 times slower for encoding and 1.5 times slower for decoding compared to JPEG format

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  • A method and device for webp entropy encoding
  • A method and device for webp entropy encoding
  • A method and device for webp entropy encoding

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Embodiment Construction

[0060] The core of the present application is to provide a method, device, device and computer-readable storage device for WebP entropy coding, which can increase the speed of WebP entropy coding.

[0061] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0062] Please refer to figure 1 , figure 1 It is a flow chart of a WebP entropy encoding method provided by the embodiment of this application.

[0063...

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Abstract

The invention discloses a WebP entropy coding method, which comprises the steps of: formulating a combined probability table according to a preset rule; reading n consecutive binary bits from a received binary sequence; finding a combined probability of the n consecutive binary bits in the combined probability table; and determining a corresponding coding algorithm according to the combined probability, and acquiring current intervals according to a preset interval by adopting the coding algorithm. According to the WebP entropy coding method, the combined probability table is formulated according to the preset rule, the n consecutive binary bits are read from the received binary sequence, the corresponding combined probability is found, the corresponding coding algorithm is determined according to the combined probability, and the current intervals corresponding to the n consecutive binary bits are calculated in one step according to the preset interval by adopting the coding algorithm, so that the speed of the entire WebP entropy coding process is significantly accelerated. The invention further provides a WebP entropy coding device, WebP entropy coding equipment and computer readable storage equipment, which have the above beneficial effects.

Description

technical field [0001] The present application relates to the field of WebP, in particular to a method, device, device and computer-readable storage device for entropy encoding of WebP. Background technique [0002] With the development of image acquisition equipment such as mobile phones, tablets, and digital cameras, and the increase in image pixel scale, the image data scale on the Internet has grown exponentially, which poses serious challenges to the data storage and network bandwidth of data center servers. In order to change this situation, Google released a new image compression format WebP in 2010, which can reduce the size of image files without affecting the user experience. This compression format can reduce the file size of JPEG images by 39.8%, that of PNG images by 26%, and that of GIF images by 64% with the same image quality. [0003] The process of the WebP entropy coding algorithm is divided into two steps. One is compression, which mainly divides, predic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/42H04N19/61H04N19/91
Inventor 魏士欣
Owner ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
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