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Coding tools with reference picture resampling

A reference picture, encoding and decoding technology, applied in image communication, digital video signal modification, electrical components, etc., can solve the problem of digital video occupying the maximum bandwidth, etc.

Pending Publication Date: 2021-12-28
BEIJING BYTEDANCE NETWORK TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Despite advances in video compression, digital video still occupies the largest bandwidth used on the Internet and other digital communication networks

Method used

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  • Coding tools with reference picture resampling
  • Coding tools with reference picture resampling
  • Coding tools with reference picture resampling

Examples

Experimental program
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Embodiment Construction

[0049] The techniques and devices disclosed in this document provide codec tools with adaptive resolution conversion. AVC and HEVC do not have the ability to change resolution without introducing IDR or Internal Random Access Point (IRAP) pictures; this capability may be referred to as Adaptive Resolution Change (ARC). There are a few use cases or application scenarios that would benefit from ARC features, including the following:

[0050] - Rate adaptation in video telephony and conferencing: In order to adapt the codec video to changing network conditions, when the network conditions become worse so that the available bandwidth becomes lower, the encoder can encode pictures with smaller resolutions. get used to it. Currently, changing image resolution can only be done after IRAP images; this has several problems. An IRAP picture of reasonable quality will be much larger than an inter-coded picture, and correspondingly more complex to decode: it takes time and resources. T...

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Abstract

A video processing method is provided to include deriving, for a conversion between a current video block of a current picture of a video and a coded representation of the video, one or more motion vector offsets based on one or more resolutions of reference pictures associated with the current video block and a resolution of the current picture; and performing the conversion using the one or more motion vector offsets.

Description

[0001] Cross References to Related Applications [0002] In accordance with applicable patent law and / or the rules of the Paris Convention, this application is intended to promptly claim the International Patent Application No. PCT / CN2019 / 086487 filed on May 11, 2019 and the International Patent Application No. PCT filed on October 12, 2019 Priority and benefits of / CN2019 / 110905. The entire disclosure of the above application is incorporated by reference as part of the disclosure of the present application for all purposes prescribed by law. technical field [0003] This patent document relates to video processing techniques, devices and systems. Background technique [0004] Despite advances in video compression, digital video still occupies the largest bandwidth used on the Internet and other digital communication networks. The bandwidth requirements used by digital video are expected to continue to grow as the number of connected user devices capable of receiving and d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/51
CPCH04N19/176H04N19/103H04N19/136H04N19/517H04N19/70H04N19/105H04N19/51
Inventor 张凯张莉刘鸿彬王悦
Owner BEIJING BYTEDANCE NETWORK TECH CO LTD