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Intra codec method, encoder and decoder

An intra-frame coding and intra-frame prediction technology, which is applied in the field of video coding and decoding, and can solve the problems of low coding efficiency and inflexible coding methods.

Active Publication Date: 2019-04-16
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, the existing encoding method is not flexible enough and the encoding efficiency is low

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  • Intra codec method, encoder and decoder
  • Intra codec method, encoder and decoder
  • Intra codec method, encoder and decoder

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Embodiment Construction

[0055] 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.

[0056] It should be understood that the pixel value in the present invention can be the luminance component value of the pixel, or the chrominance component value (such as one of the Cb and Cr components) of the pixel, or one of the R, G, and B component values; When a pixel is represented by other color spaces such as Lab (color model), HSV (hue, saturation, and luminance), it can also be one of these color components. Correspondingly, the transform coeff...

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Abstract

Embodiments of the present invention provide an intra-frame encoding and decoding method, an encoder, and a decoder. The intra-frame encoding method includes obtaining a reference pixel value of a current image block; and using an intra-frame prediction algorithm according to the reference pixel value of the current image block Obtain the predicted value of the first type pixel in the current image block, the current image block includes the first type pixel and the second type pixel, and the second type pixel is the pixel in the current image block except the first type pixel; according to the first type pixel The predicted value of the pixel and the original pixel value of the first type of pixel are used to obtain the residual value of the first type of pixel; according to the residual value of the first type of pixel, the transformation coefficient is obtained; the transformation coefficient is quantized to obtain the quantized transformation coefficient; and the predicted value of the first type of pixel, reconstruct the first type of pixel to obtain the reconstructed value of the first type of pixel; according to the reconstructed value of the first type of pixel, use the interpolation method to obtain the reconstructed value of the second type of pixel. The embodiment of the present invention enables flexible coding and improves coding efficiency.

Description

technical field [0001] The present invention relates to the field of video encoding and decoding, in particular to an intra-frame encoding and decoding method, encoder and decoder. Background technique [0002] Due to the large amount of information, video signals require high transmission network bandwidth or medium storage space. Therefore, before transmitting the video signal, it is necessary to compress and encode it, and then transmit it in order to save the transmission network bandwidth or the storage space of the medium. The main goal of video compression coding is to make the distortion of compressed and reconstructed images as small as possible under a certain bit rate (rate / bitrate). [0003] Traditional intra-frame coding usually includes multiple links such as prediction, transform, quantization, and entropy coding. Specifically, first, for an image block, according to the reconstructed Reference pixels for intra prediction (Intra prediction). Intra-frame pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/61H04N19/122H04N19/124H04N19/13H04N19/587
CPCH04N19/122H04N19/61H04N19/124H04N19/176H04N19/593H04N19/132H04N19/136H04N19/18H04N19/82H04N19/59H04N19/105H04N19/182H04N19/13H04N19/159
Inventor 曾兵陈宸赵寅杨海涛朱树元
Owner HUAWEI TECH CO LTD
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