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Apparatus and method for inverse quantization

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

Active Publication Date: 2021-04-20
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 inverse quantization
  • Apparatus and method for inverse quantization
  • Apparatus and method for inverse quantization

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Embodiment Construction

[0078] In the following description, reference is made to the accompanying drawings which form a part hereof and which show by way of illustration specific aspects of embodiments of the invention or with which embodiments of the invention may be employed. It is to be understood that the embodiments of the present invention may be utilized in other respects and include structural or logical changes not depicted in the drawings. Accordingly, the following detailed description is not to be taken in a limiting sense, and the scope of the invention is defined by the appended claims.

[0079] For example, it should be understood that what is disclosed with reference to a described method may also be true for a corresponding device or system for performing the method, and vice versa. For example, if one or more specific method steps are described, the corresponding device may include one or more units, such as functional units for performing the described one or more method steps (fo...

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Abstract

A method for inverse quantization of a current block of a picture is provided. The method is performed by a decoder, and the picture comprises a luminance component and a chrominance component, the luminance component and the chrominance component are partitioned into multiple blocks. The method includes that obtaining one or more existing quantization parameter, QP values from a received bitstream, wherein the one or more existing QP values relate to a current block in the chrominance component; determining a QP value for the current block in the chrominance component based on the one or more existing QP values; performing inverse quantization on the current block in the chrominance component by using the determined QP value.

Description

technical field [0001] The present invention relates to the technical field of image and / or video decoding, and in particular to a device and method for inverse quantization. Background technique [0002] Digital video communication and storage applications are enabled by a variety of digital devices such as digital cameras, cellular radiotelephones, laptop computers, broadcast systems, video conferencing systems, and the like. One of the most important and challenging tasks in these applications is video compression. Video compression is complex and constrained by two conflicting parameters of compression efficiency and computational complexity. Video coding standards such as ITU-T H.264 / AVC or ITU-T H.265 / HEVC provide a good trade-off between these parameters. Therefore, almost all video compression applications are required to support video coding standards. [0003] Video compression techniques such as inter prediction, intra prediction, and loop filters have proven e...

Claims

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Application Information

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Patent Type & Authority Applications(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