Image encoding and decoding method and device
A decoding method and image technology are applied in the field of image encoding and decoding methods and devices, and can solve problems such as increasing design overhead and limiting the maximum size of prediction data blocks.
Active Publication Date: 2017-01-11
HUAWEI TECH CO LTD
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[0004] However, in the existing codec system, there is a limit to the maximum size of the prediction data block. When the size of the current image block exceeds the maximum size of the prediction data block allowed by the system, it is necessary to design a new codec structure and increase the design overhead
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[0132] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0133] The main idea of the present invention is to obtain the prediction data from the adjacent data of the current image block by down-sampling when the size of the current image block is larger than the maximum prediction size, so that the prediction data obtained according to the obtained prediction data The size of the prediction data block is within the range allowed by the system, and then, the obtained prediction data block is up-sampled so that the s...
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The embodiment of the invention provides an encoding and decoding method and an encoding and decoding device for an image. The invention is implemented through determining the size and the maximum prediction size of a current image block, when the size of the current image block is greater than the maximum prediction size, the first prediction data of the current image block are obtained from the adjacent data of the current image block through the down sampling manner, the first prediction data block of the current image block is obtained according to the intra-frame prediction mode and the first prediction data, encoding is carried out according to the first prediction data block, as the first prediction data of the first prediction data block are obtained from the adjacent data of the current image block through the down sampling manner, namely the number of sample points obtained from the prediction data of the first prediction data block is reduced, the size of the obtained first prediction data block is reduced, accordingly, the size of the first prediction data block is enabled to be equal to the maximum prediction size, the requirement of the maximum prediction size permitted by the system is met, and the design cost is not increased.
Description
technical field [0001] Embodiments of the present invention relate to image processing technologies, and in particular, to an image encoding and decoding method and device. Background technique [0002] In the 3D video image system, there are two types of images, the view image and the depth image. The view image contains the information of the image itself, such as color information, and the depth image contains the depth information of the view image, such as contour information. In the transmission of 3D video images, in order to reduce the bandwidth occupied by video transmission, it is necessary to perform coding processing on video images, including coding processing of view images and depth images, so as to reduce the size of transmitted 3D video image data. [0003] Simplified Depth Coding (hereinafter referred to as: SDC) is to obtain a constant value according to the prediction data block after obtaining the prediction data block through the intra prediction mode, ...
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IPC IPC(8): H04N13/00H04N19/00H04N19/50H04N19/597
Inventor 郑萧桢
Owner HUAWEI TECH CO LTD