Decoding method and encoding method for target image block and decoder and encoder

A decoding method and technology of target images, which are applied in image communication, digital video signal modification, electrical components, etc., can solve the problems of low video image compression efficiency and so on.

Active Publication Date: 2015-01-21
HUAWEI TECH CO LTD
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  • Abstract
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Problems solved by technology

[0006] The present invention proposes a decoding method and an encoding method of a target image block as well as a decoder and an encoder, aiming to solve the problem of low compression efficiency of existing video images using palette encoding mode

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  • Decoding method and encoding method for target image block and decoder and encoder
  • Decoding method and encoding method for target image block and decoder and encoder
  • Decoding method and encoding method for target image block and decoder and encoder

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Embodiment Construction

[0107] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0108] In order to clearly describe the codec method in the embodiment of the present invention, the following concepts need to be clarified first.

[0109] Palette: It consists of a group of elements, each element is a representative sampling point value among all sampling points of the signal component of the target image block, and the size of the palette is the number of elements in the palette. The number and value of elements in the palette can be de...

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Abstract

Provided in an embodiment of the present invention are a target image block decoding and encoding method, and a decoder and encoder. The decoding method comprises: obtaining predictive information of a target color palette from the received data rate of the target image block; determining the set of matching elements in the color palette template according to the predictive information; determining the set of target elements according to the predictive information and the set of the matching elements; and decoding the target image block according to the set of the target elements. The embodiment of the present invention predictively encodes the target color palette using for example the predictive information to reduce encoding overhead of the target color palette, thus improving compression efficiency of video images employing the multi-stage BCIM-based scheme.

Description

technical field [0001] The present invention relates to the field of video coding and decoding, in particular, to a decoding method and a decoder for a target image block, and an encoding method and an encoder for a target image block. Background technique [0002] With the rapid development of the Internet and the increasingly rich material and spiritual culture of people, there are more and more requirements for video applications on the Internet, especially for high-definition video applications, and the data volume of high-definition videos is very large. For transmission in the Internet with limited bandwidth, the problem that must be solved first is the problem of high-definition video compression and encoding. [0003] Existing video coding standard technologies can effectively compress and code natural image sequences, but they are not completely suitable for screen content sequences. Compared with natural content, the edges of text and tables contained in screen co...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/593H04N19/176
CPCH04N19/463
Inventor 朱文静张红區子廉杨海涛
Owner HUAWEI TECH CO LTD
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