Image encoding and decoding method, image processing device
A technology of image encoding and image decoding, which is applied in the field of digital video encoding and decoding, and can solve the problems of reducing the compression efficiency of multiple palettes and pixel string copy methods, not being updated, palette color supplements, etc.
Active Publication Date: 2016-12-21
TONGJI UNIV +1
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However, in the multiple palette and pixel string copying methods of the prior art, each palette and pixel string copying methods have their own independent palette color candidate sets, if the codec block does not use a palette and pixel string In the string copy mode, the palette color candidate set corresponding to the palette and the pixel string copy mode will not be updated, and no new more suitable palette color will be added to the corresponding palette color candidate set
This approach greatly reduces the compression efficiency of multiple palettes and pixel string copy methods
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[0054] In order to understand the characteristics and technical contents of the embodiments of the present invention in more detail, the implementation of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. The attached drawings are only for reference and description, and are not intended to limit the embodiments of the present invention.
[0055] The natural form of a digital video signal for images is a sequence of images. A frame of image is usually a rectangular area composed of several pixels, while a digital video signal is a sequence of video images consisting of dozens to thousands of frames of images, sometimes referred to as a video sequence or sequence. Encoding a digital video signal is encoding a frame-by-frame image. At any moment, the frame of image being encoded is called the current encoding image. Similarly, decoding a compressed video code stream of a digital video signal (abbreviated as ...
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The invention discloses an image encoding and decoding method and an image processing device. The method comprises the following steps: generating a new palette color according to the pixel of the current encoding block when one of the palette and pixel string copying encoding modes is used for performing copying encoding on the current encoding block; generating the palette of the current encoding block according to the new palette color and / or a palette color candidate set shared by the palette and pixel string copying encoding modes; using the palette to perform the palette and pixel string copying encoding, and generating a video code stream containing the copying mode and a copying parameter; analyzing the video code stream to acquire at least one piece of the following information: the copying mode of the palette and pixel string copying decoding, the copying parameter and the new palette color; generating the palette according to the new palette color and / or the palette color candidate set shared by the palette and pixel string copying decoding modes; and using the palette to performing the palette and pixel string copying decoding.
Description
technical field [0001] The invention relates to digital video encoding and decoding technology, in particular to an image encoding and decoding method and image processing equipment. Background technique [0002] As TVs and monitors enter ultra-high-definition (4K) and ultra-high-definition (8K) resolutions, as well as the development and popularization of a new generation of cloud computing and information processing models and platforms with remote desktops as a typical form, the video image The need for data compression is also moving towards higher resolutions and composite images that include camera ingested images and computer screen images. It has become an indispensable technology to perform ultra-high compression ratio and extremely high-quality data compression on video images. [0003] Make full use of the characteristics of 4K / 8K images and computer screen images to compress video images with high efficiency (HEVC, High Efficiency Video Coding), which is also th...
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IPC IPC(8): H04N19/103H04N19/176H04N19/597H04N19/547H04N19/182
CPCH04N19/103H04N19/176H04N19/182H04N19/547H04N19/597H04N19/70H04N19/593H04N19/186H04N19/17
Inventor 林涛李明吴平尚国强吴钊
Owner TONGJI UNIV