Coding and decoding method and device

An encoding method and technology for encoding blocks, which are applied in image communication, digital video signal modification, electrical components, etc., can solve the problem of not considering that the reference information on the right side of the current block can be obtained and the reference information on the left and right sides can be obtained.

Pending Publication Date: 2021-03-02
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Claims
  • Application Information

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Problems solved by technology

However, the existing intra prediction technology only considers that the reference information on the left side of the current block and the reference information on the upper side are available, and does not consider that the reference information on the right side of the current block and the reference information on the left and right sides are available. Case

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  • Coding and decoding method and device
  • Coding and decoding method and device
  • Coding and decoding method and device

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Embodiment Construction

[0095] Reference will now be made in detail to the exemplary embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, wherein like numerals refer to like parts throughout. The embodiments are described below in order to explain the present disclosure by referring to the figures.

[0096] Figure 4 A flowchart showing an encoding method according to an exemplary embodiment of the present disclosure. Figure 4 The encoding method in can be applied to encoders using intra-predictive filtering (IPF) techniques.

[0097] refer to Figure 4 , in step S401, perform intra-frame prediction on the current coding block based on the availability of reference pixels of the current coding block.

[0098] In an exemplary embodiment of the present disclosure, when intra-frame prediction is performed on the current coding block, all intra-frame prediction modes may be traversed for the current coding block first, and the predicted pixel values ​...

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Abstract

The invention provides a coding and decoding method and device. The encoding method comprises the following steps: performing intra-frame prediction on a current encoding block based on the availability of a reference pixel of the current encoding block; and writing information for intra prediction into the code stream, wherein the information for intra prediction at least comprises information about an intra prediction mode. The decoding method includes: parsing information for intra prediction from a code stream, the information for intra prediction including at least information about an intra prediction mode; calculating a prediction pixel value of the current coding block according to the analyzed information for intra-frame prediction based on the availability of the reference pixelof the current coding block; and reconstructing the image according to the predicted pixel value to obtain a decoded image. In this way, the intra-frame prediction efficiency is improved, and then theperformance of video coding is improved.

Description

technical field [0001] The present disclosure relates to the technical field of video coding and decoding. More specifically, the present disclosure relates to a codec method and device. Background technique [0002] In existing video or image encoding and decoding methods, an image is generally divided into multiple image blocks, and then each image block is encoded or decoded. The coding steps for each image block can be divided into prediction, transformation, quantization and entropy coding, wherein the prediction is to use the reconstructed pixel values ​​of the previously coded image block (these pixels are called reference pixels) to perform the current image block to be coded Predict to derive the predicted pixel value, and then encode the difference between the actual value of the current image block and the predicted pixel value into the code stream. When decoding, the decoder also needs to use the reconstructed pixel values ​​of the previously decoded image bloc...

Claims

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Application Information

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IPC IPC(8): H04N19/103H04N19/147H04N19/159H04N19/176H04N19/44
CPCH04N19/103H04N19/147H04N19/159H04N19/176H04N19/44H04N19/105H04N19/11H04N19/117H04N19/119H04N19/129H04N19/134H04N19/182H04N19/186H04N19/46H04N19/593
Inventor 欧阳晓王凡吕卓逸朴银姬
Owner BEIJING SAMSUNG TELECOM R&D CENT
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