Guangdong Oppo Mobile Telecommunications Corp., Ltd.

Qihong Ran

Junyan Huo

Fuzheng Yang

Shuai Wan

Yanzhuo Ma

Xinwei Li

Wei Jun Zhang

Wei Zhang

Ruipeng Qiu

Embodiments of the present application provide an inter prediction method, an encoder, a decoder, and a storage medium. The method comprises: determining a prediction mode parameter of a current block; when the prediction mode parameter indicates that the current block determines an inter prediction value by using a geometrical partition mode (GPM), constructing a merge candidate list of the current block; constructing a GPM motion information candidate list according to first motion information in the merge candidate list of the current block; and determining an inter prediction value of the current block according to the GPM motion information candidate list.

Inter prediction method, encoder, decoder, and storage medium

A prediction decoding method, a prediction decoding apparatus, and a non-transitory computer storage medium are provided. The method includes the following. First multiple neighbouring reference samples of a coding block are determined, where the first multiple neighbouring reference samples include reference samples in a reference row or a reference column neighbouring the coding block. Positions corresponding to K reference samples are determined from a starting position of the reference row or the reference column, where K is a positive integer. Second multiple neighbouring reference samples are determined according to the determined positions corresponding to the K reference samples, where the second multiple neighbouring reference samples include neighbouring reference samples among the first multiple neighbouring reference samples. Prediction decoding is performed on the coding block according to the second multiple neighbouring reference samples.

Prediction decoding method and apparatus

An inter prediction method comprising: determining a prediction mode parameter of a current block which indicates using a GPM to determine an inter prediction value of the current block, obtaining a merge motion information candidate list, wherein the merge motion information candidate list comprises one or more motion candidate information item and the motion candidate information item comprises one or two motion vector; generating a GPM motion information candidate list by using the motion vectors included in the motion candidate information items according to a sequence of the motion candidate information items in the merge motion information candidate list comprises a motion vector; selecting, from the GPM motion information candidate list, a first motion vector of a first partition and a second motion vector of a second partition in the current block; and determining the inter prediction value by using the first motion vector and the second motion vector.

A method and apparatus for inter prediction. According to the position of a current block in a video picture, first motion information and second candidate motion information is determined, the motion information at least includes a motion vector; it is determined whether the distance between the motion vector of the first motion information and the motion vector of the second candidate motion information is greater than a first threshold; if the determination result is that the distance is less than or equal to the first threshold, the second candidate motion information is updated to obtain second motion information; if the determination result is that the distance is greater than the first threshold, the second candidate motion information is taken as the second motion information; and inter prediction is performed on the current block by using the first motion information and the second motion information.

Method for inter prediction method, video picture encoder and decoder

Provided are inter prediction methods and a decoder. In the method, a bitstream is parsed to determine a prediction mode parameter of a current block; a Geometrical Partition Mode (GPM) parameter of the current block and a merge candidate list of the current block and attribute information of motion information in the merge candidate list are determined when the prediction mode parameter indicates to determine an inter prediction value of the current block by using GPM; a first motion information mapping table of a first partition and a second motion information mapping table of a second partition are determined according to the GPM parameter, merge candidate list and attribute information; and the inter prediction value of the current block is determined based on the first and second motion information mapping tables and merge candidate list.

Inter prediction method based on motion information mapping tables of partitions in geometrical partition mode, encoder, decoder, and storage medium

Disclosed are an inter prediction method, encoder/decoder, and storage medium. The method includes: determining a prediction mode parameter of a current block; when the parameter indicates that a GPM is used for determining an inter prediction value of the current block, determining an angle and a distance corresponding to a dividing line in the current block, setting an angle index value and a distance index value to index serial numbers corresponding to the angle and the distance in a preset mapping table respectively; determining a value of shifting direction indicator of the current block, which is used for indicating shifting directions of different dividing lines of the current block at the angle, by using a preset model based on size information and the angle index value of the current block; performing inter prediction on the current block based on the value of shifting direction indicator and the distance index value.

Inter prediction method, encoder, decoder and storage medium

The inter prediction method comprises: determining a prediction mode parameter of a current block; determining a GPM parameter of the current block in response to that the prediction mode parameter indicates that a GPM is used to determine inter prediction of the current block; determining a first prediction value of a first partition of the current block and a second prediction value of a second partition of the current block; determining a weight index of a sample in the current block based on the GPM parameter of the current block; determining a first weight value and a second weight value of the sample in the current block based on the weight index of the sample in the current block; performing weighted combination of the first prediction value and the second prediction value to obtain the inter prediction of the current block.

Inter prediction method and encoder

Colour component prediction method is provided, which includes that: first reference sample set corresponding to colour component to be predicted of coding block in video image is acquired; when available sample number in first reference sample set is less than preset number, preset component value is taken as predicted value corresponding to the colour component to be predicted; when available sample number in first reference sample set is not less than preset number, first reference sample set is screened to obtain second reference sample set; when available sample number in second reference sample set is equal to preset number, model parameter is determined through second reference sample set, and prediction model corresponding to colour component to be predicted is obtained based on model parameter, prediction model is used for prediction processing of colour component to be predicted to obtain predicted value corresponding to colour component to be predicted.

Image component prediction method and device, and computer storage medium

Provide are an inter prediction method, encoder, decoder, and storage medium. Said method comprises: determining a prediction mode parameter of the current block; when the prediction mode parameter indicates a geometrical partitioning prediction mode is used for determining inter prediction of the current block, determining a geometrical partitioning prediction mode parameter of the current block; according to the geometrical partitioning prediction mode parameter, determining a first and a second prediction value and a weight index corresponding to the sample in the current block; clipping the weight index corresponding to the sample in the current block to obtain absolute information of the weight index; determining a first and a second weight value based on absolute information of the weight index; and determining an inter prediction of the sample of the current block according to weighted combination of the first prediction value, first weight value, second prediction value and second weight value.

A prediction decoding method, a prediction decoding apparatus, and a computer storage medium are provided. The method includes the following. First multiple neighbouring reference samples are obtained by acquiring neighbouring reference samples of a coding block, where the first multiple neighbouring reference samples include reference samples in a reference row or a reference column neighbouring the coding block. Positions corresponding to K reference samples are determined from a starting position of the reference row or the reference column, where K is a positive integer. Second multiple neighbouring reference samples are obtained according to the determined positions corresponding to the K reference samples, where the second multiple neighbouring reference samples include neighbouring reference samples among the first multiple neighbouring reference samples except the K reference samples. Prediction decoding is performed on the coding block according to the second multiple neighbouring reference samples.

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Dongguan, China

Qihong Ran