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Apparatus and method for performing inverse quantization

A technology of inverse quantization and quantization parameters, applied in the field of image and/or video decoding, which can solve problems such as complex video compression

Active Publication Date: 2022-02-18
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Video compression is complex and constrained by two contradictory parameters of compression efficiency and computational complexity

Method used

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  • Apparatus and method for performing inverse quantization
  • Apparatus and method for performing inverse quantization
  • Apparatus and method for performing inverse quantization

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Embodiment Construction

[0078] In the following description, reference to the accompanying drawings constituting the invention, the specific aspects of the embodiments of the present invention may be illustrated by way of illustration. It will be understood that embodiments of the invention can be used in other aspects and include structural or logical changes not depicted in the drawings. Thus, the following detailed description is not to be a limiting meaning, and the scope of the invention is defined by the appended claims.

[0079] For example, it should be understood that the content disclosed with reference to the method described with reference to the corresponding device or system for performing the method, and vice versa. For example, if one or more specific method steps are described, the corresponding devices may include one or more units, such as functional units for performing the described one or more method steps (for example, executing one or more). One unit of the step; or multiple units...

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Abstract

The present invention provides a method for dequantizing a current block of an image. The method is performed by a decoder, the image includes a luminance component and a chrominance component, and the luminance component and / or the chrominance component is divided into a plurality of blocks. The method includes: obtaining one or more existing quantization parameter (quantization parameter, QP) values ​​from the received code stream, wherein the one or more existing QP values ​​are the same as those in the chrominance component The current block correlation; determine the QP value of the current block in the chroma component according to the one or more existing QP values; use the determined QP value to the current block in the chroma component Blocks are dequantized.

Description

Technical field [0001] The present invention relates to the field of image and / or video decoding techniques, and more particularly to devices and methods for performing inverse quantization. Background technique [0002] Digital video communications and storage applications are implemented through a variety of digital devices, such as digital cameras, cellular radiopers, laptop, broadcast systems, video conferencing systems, etc. One of these applications is one of the most important and challenging tasks in these applications is video compression. Video compression is complicated, and both compressed efficiency and computational complexity constraints. Video decoding standards such as ITU-T H.264 / AVC or ITU-T H.265 / HEVC provide good trade-offs between these parameters. Therefore, almost all video compression applications are required to support video decoding criteria. [0003] Video compression techniques such as inter prediction, intra prediction, and loop filters have b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/124H04N19/186H04N19/176
CPCH04N19/124H04N19/186H04N19/176H04N19/70H04N19/96H04N19/463H04N19/60H04N19/105H04N19/132H04N19/46
Inventor 罗曼·切尔尼亚克亚历山大·卡拉布托夫谢尔盖·尤里耶维奇·伊科宁蒂莫菲·米哈伊洛维奇·索洛维耶夫杨海涛陈建乐赵寅
Owner HUAWEI TECH CO LTD