13results about How to "Improve codec efficiency" patented technology

This application proposes an image decoding method, an image encoding / decoding apparatus, and a computer storage medium. The image decoding method includes: acquiring the original motion vector of a block to be decoded; acquiring a first offset of the original motion vector using a preset motion vector thinning technique; adding the first offset to the original motion vector to obtain a thinned motion vector; acquiring a bidirectional prediction value of the thinned motion vector in response to the thinned motion vector being a bidirectional prediction motion vector; acquiring a second offset of the bidirectional prediction value using a preset prediction value thinning technique; obtaining a thinned prediction value based on the bidirectional prediction value and the second offset; and decoding the block to be decoded using the thinned prediction value to obtain a decoded block. This application can improve the efficiency of encoding and decoding.

This application provides a video image component prediction method and apparatus, and a computer storage medium. The method may include: acquiring a reference value set of a first image component of the current block; determining multiple first image component reference values ​​from the reference value set of the first image component; performing a first filtering process on the sample values ​​of the pixels corresponding to the multiple first image component reference values ​​respectively to obtain multiple filtered first image reference sample values; determining the image component reference value to be predicted corresponding to the multiple filtered first image reference sample values; determining the parameters of a component linear model based on the multiple filtered first image reference sample values ​​and the image component reference value to be predicted; performing a mapping process on the reconstructed value of the first image component of the current block according to the component linear model to obtain a mapping value; and determining the predicted value of the image component to be predicted of the current block based on the mapping value.

The application discloses a video decoding method, a video encoding method and a device. The video decoding method comprises the following steps: generating a weight matrix of a current block; constructing a motion information candidate list of the current block; adjusting the motion information candidate list based on a template region of the current block, and determining first motion information and second motion information of the current block; performing weighted prediction on the current block by using the weight matrix, the first motion information and the second motion information, so as to obtain a prediction value of the current block; and obtaining a decoding result of the current block based on the prediction value of the current block. The application can improve the coding and decoding efficiency.

This application discloses a method, apparatus, and medium for video encoding and decoding, and a method for processing visual media data. A template region associated with a location is an aligned template region used for contextual deduction of a set of latent syntax elements for encoding the quantization transform coefficient level at that location. The set of latent syntax elements includes: a first latent syntax element for encoding a basic range level, a second latent syntax element for encoding a lower range level, and a third latent syntax element for encoding a higher range level. For a first location of a transform block, at least one context model is determined based on the first template region associated with the first location, for at least one syntax element. The at least one syntax element is decoded from the encoding information of the transform block based on the at least one context model. A first quantization transform coefficient level at the first location is determined based on the at least one syntax element.

The embodiment of the invention provides a video encoding and decoding method and device, a computer readable medium and electronic equipment. The video decoding method comprises the following steps: determining a plurality of pixel regions in a current frame based on a preset pixel region size, wherein each pixel region comprises at least one pixel; determining a skipped area in the current frame according to whether each pixel area is processed in a skipped mode or not; and generating reconstruction data corresponding to the current block according to the position relationship between the current block to be decoded and the skipping region. According to the technical scheme of the embodiment of the invention, the coding and decoding efficiency can be improved, and the coding and decoding complexity can be reduced.

Methods for deriving an intra prediction mode based on an inter prediction signal are disclosed. In the present embodiments, an image decoding device determines a motion vector for a current block from a motion vector candidate list for the current block and generates an inter prediction signal for the current block based on a reference block indicated by the motion vector for the current block. The image decoding device derives an intra prediction mode for the current block based on the reference block and a template for the reference block and generates an intra prediction signal for the current block based on the intra prediction mode. The image decoding device generates a final prediction signal for the current block based on the inter prediction signal and the intra prediction signal.

The application provides an image processing method, an electronic device, a storage medium and a program product. The method comprises the following steps: acquiring a pixel to be processed corresponding to an image block; filtering the pixel according to the correlation between the pixel and adjacent pixels to determine a filtered pixel; and filtering the pixel to be processed corresponding to the image block according to the correlation between the pixel and adjacent pixels. The method improves or eliminates the problem of low image processing accuracy caused by uneven pixel value distribution, and improves the coding and decoding efficiency of the image.

This application provides a video image component prediction method and apparatus, and a computer storage medium. The method may include: acquiring a reference value set of a first image component of the current block; determining multiple first image component reference values ​​from the reference value set of the first image component; performing a first filtering process on the sample values ​​of the pixels corresponding to the multiple first image component reference values ​​respectively to obtain multiple filtered first image reference sample values; determining the image component reference value to be predicted corresponding to the multiple filtered first image reference sample values; determining the parameters of a component linear model based on the multiple filtered first image reference sample values ​​and the image component reference value to be predicted; performing a mapping process on the reconstructed value of the first image component of the current block according to the component linear model to obtain a mapping value; and determining the predicted value of the image component to be predicted of the current block based on the mapping value.

The embodiment of the invention provides a coding and decoding method and device for a polygon mesh and a storage medium. The encoding method includes: receiving a polygon mesh, the polygon mesh including a plurality of vertices defining a plurality of faces; determining a mesh face type for at least a portion of the polygonal mesh; determining a first parameter corresponding to the surface mode according to the grid surface type; coding the first parameter according to the grid surface type; and generating a bitstream including the polygon mesh encoded according to the two-degree processing, the mesh face type, and the first parameter.

The application provides an audio encoding and decoding method, device, equipment, medium and program product; wherein the audio encoding method comprises: decomposing an audio signal to obtain a low-frequency sub-band signal and a high-frequency sub-band signal; performing multi-level feature extraction processing based on the low-frequency sub-band signal and the high-frequency sub-band signal to obtain sub-band signal features corresponding to multiple levels respectively; performing quantization processing on the sub-band signal features corresponding to each level to obtain index values of the sub-band signal features; performing encoding processing on the index values of the sub-band signal features to obtain code streams corresponding to the levels; and configuring corresponding transmission priorities for the code streams corresponding to the multiple levels respectively; wherein the transmission priority is positively correlated with a decoding quality index of the code stream corresponding to the level. The application can be flexibly applied to different network bandwidth application scenarios, and the efficiency and quality of audio encoding and decoding are improved.

The invention provides a data processing method and device, equipment and a storage medium, and relates to the technical field of computers. The method comprises the following steps: acquiring a global parameter, and performing frame compensation based on a frame compensation mode in the global parameter, so that the video coding and decoding efficiency is improved.

The invention provides a data processing method and device, equipment and a storage medium, and relates to the technical field of computers. The method comprises the following steps: acquiring a frame level parameter, determining whether a time domain sampling magnification change flag bit is set or not according to the frame level parameter, and under the condition that the time domain sampling magnification change flag bit is not set, performing frame compensation based on a frame compensation strategy corresponding to a previous frame of a current frame, thereby improving the video coding and decoding efficiency.