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Bi-prediction with adaptive weights

An adaptive weight and two-way prediction technology, applied in digital video signal modification, electrical components, image communication, etc., can solve problems such as low quality, lossy decompressed video, and lack of information in compressed video

Pending Publication Date: 2021-02-12
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compression can be lossy because compressed video lacks some of the information present in the original video
Consequences can include that the decompressed video may be of lower quality than the original uncompressed video because there is not enough information to accurately reconstruct the original video

Method used

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  • Bi-prediction with adaptive weights
  • Bi-prediction with adaptive weights
  • Bi-prediction with adaptive weights

Examples

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Embodiment Construction

[0020] In some implementations, adaptive weights can be used to improve weighted predictions. For example, combinations of reference pictures (eg, predictors) may be calculated using weights, which may be adaptive. One way to adapt the weights is to adapt the weights based on the reference picture distance. Another approach to adaptive weights is to adapt the weights based on neighboring blocks. For example, if the motion of the current block is to be merged with neighboring blocks, such as in merge mode, weights from neighboring blocks may be employed. By adaptively determining the weights, compression efficiency and bit rate can be improved.

[0021] Motion compensation may include methods of predicting a video frame, or a portion thereof, given previous frames and / or future frames by taking into account the motion of the camera and / or objects in the video. It may be used for video compression in the encoding and decoding of video data, for example using the Moving Pictur...

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PUM

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Abstract

A method includes receiving a bit stream; determining whether a bi-directional prediction with adaptive weights mode is enabled for a current block; determining at least one weight; and reconstructingpixel data of the current block and using a weighted combination of at least two reference blocks. Related apparatus, systems, techniques and articles are also described.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Patent Application No. 62 / 694,524, filed July 6, 2018, and U.S. Provisional Patent Application No. 62 / 694,540, filed July 6, 2018, the entire contents of each of which are at This is expressly incorporated herein by reference. technical field [0003] The subject matter described in this article involves video compression including decoding and encoding. Background technique [0004] A video codec may include electronic circuitry or software that compresses or decompresses digital video. It converts uncompressed video to compressed format and vice versa. In the context of video compression, a device that compresses video (and / or performs some function thereof) may generally be referred to as an encoder, and a device that decompresses video (and / or performs some function thereof) may be referred to as a decoder. [0005] The format of the compressed data may confor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/159H04N19/176
CPCH04N19/577H04N19/52H04N19/70H04N19/176H04N19/105H04N19/126H04N19/91H04N19/96
Inventor H·卡尔瓦B·福尔特
Owner MITSUBISHI ELECTRIC CORP