2results about How to "Improve codec performance" patented technology

This application provides a video encoding method, a video decoding method, an apparatus, a device, and a storage medium, relating to the field of video encoding and decoding technology. The method includes: for a current block within a video frame, acquiring at least one first matching block; acquiring at least one second matching block based on the at least one first matching block, wherein at least one first matching block corresponds to a second matching block with a quantity greater than or equal to one, and the second matching blocks are encoded blocks that match the first matching blocks based on a second prediction mode; determining a prediction block corresponding to the current block from the at least one first matching block and the at least one second matching block; and encoding the current block based on the prediction block corresponding to the current block. The above method improves the accuracy of intra-frame prediction, thereby improving the performance of video encoding and decoding.

The embodiment of the application discloses a coefficient coding and decoding method, an encoder, a decoder and a computer storage medium, which are applied to the decoder, and the method comprises the following steps: based on the position of a to-be-decoded quantization coefficient, a first context model adaptive binary arithmetic coding mode is used to analyze a code stream to obtain the value of non-zero identification information; in the case that the value of the non-zero identification information is a first value, a second context model adaptive binary arithmetic coding mode is used to analyze the code stream to obtain the value of X preset identification information; in the case that the value of the Xth preset identification information is the first value, the target order of the exponential golomb code is determined, and the code stream is analyzed by using the exponential golomb decoding algorithm of the target order to obtain the residual value of the reconstructed quantization coefficient absolute value; and the value of the non-zero identification information, the value of the X preset identification information and the residual value of the reconstructed quantization coefficient absolute value are used to determine the reconstructed quantization coefficient absolute value corresponding to the quantization coefficient position.