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Image encoding and decoding method, device and chip

An image encoding and image data technology, applied in the field of image encoding and decoding, can solve the problems of quality impact, reduction of image data volume, and large quality loss, and achieve the effect of improving compression efficiency, reducing data volume, and simple implementation.

Active Publication Date: 2021-02-23
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while the amount of image data is reduced, its quality will also be affected to a certain extent
In general, the higher the image compression ratio, the greater the quality loss

Method used

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  • Image encoding and decoding method, device and chip
  • Image encoding and decoding method, device and chip
  • Image encoding and decoding method, device and chip

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Embodiment Construction

[0060] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Among them, in the description of the embodiments of this application, unless otherwise specified, " / " means or means, for example, A / B can mean A or B; "and / or" in this article is only a description of associated objects The association relationship of indicates that there may be three kinds of relationships, for example, A and / or B may indicate: A exists alone, A and B exist simultaneously, and B exists independently. In addition, in the description of the embodiments of the present application, terms such as "first" and "second" are used for description purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, a feature defined as "first", "second", etc. may expressly or implicitly include one o...

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Abstract

The invention discloses a method, device and chip for image encoding and decoding, and the encoding method comprises the steps: obtaining a run value sequence and a level value sequence through a quantized sequence of an image, obtaining the distribution probability of updated level values according to a mapping rule based on the distribution probability of run values and level values, and obtaining the distribution probability of updated level values according to the mapping rule; and finally, entropy coding is carried out according to the level value sequence and the distribution probabilityof the updated level values, and coded image data is output. And the decoding side only needs to additionally obtain the mapping rule to finish decoding. The method is simple to implement, the compression efficiency of the image can be improved, and the data volume of the representation image is effectively reduced.

Description

technical field [0001] The present application relates to the field of image processing and compression, and more specifically, to methods, devices and chips for image encoding and decoding. Background technique [0002] Image coding, that is, image compression, is to represent image information with as few bits as possible by removing various redundancies in image data under the premise of ensuring a certain reconstruction quality. Image compression coding technology can be traced back to 1984 when the communication industry researched the digital transmission of TV signals, and it has a history of more than 30 years. JPEG, JPEG2000, MPEG-1, MPEG-2, MPEG-4, H.261, H.263 and other international coding standards have achieved great success, and new image coding methods are still emerging. [0003] Digital image signals have been widely used in people's daily life, and have become one of the most common multimedia signals. Image coding technology realizes the compression of ...

Claims

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Application Information

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IPC IPC(8): H04N19/42H04N19/93H04N19/91H04N19/124H04N19/44G06T9/00
CPCH04N19/42H04N19/93H04N19/91H04N19/124H04N19/44G06T9/005H04N19/60H04N19/13H04N19/172H04N19/136
Inventor 李斌刘凌沈晖顾佳琦
Owner HUAWEI TECH CO LTD
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