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Inverse quantization device and method used in image decoding device

An inverse quantization and decoder technology, applied in image communication, digital video signal modification, electrical components, etc., can solve the problem of increasing data volume and achieve the effect of improving compression performance

Pending Publication Date: 2021-12-24
HYUNDAI MOTOR CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, image sizes, resolutions, and frame rates are gradually increasing, and accordingly, the amount of data to be encoded is also increasing

Method used

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  • Inverse quantization device and method used in image decoding device
  • Inverse quantization device and method used in image decoding device
  • Inverse quantization device and method used in image decoding device

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Embodiment Construction

[0024] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that when reference numerals are added to constituent elements in respective drawings, the same reference numerals denote the same elements although the elements are shown in different drawings. Also, in the following description of the embodiments, detailed descriptions of known functions and configurations incorporated herein will be omitted to avoid obscuring the subject matter of the embodiments.

[0025] figure 1 is an exemplary block diagram of a video encoding device capable of implementing the techniques of this disclosure. In the following, reference will be made to figure 1 A video encoding device and elements of the device will be described.

[0026] The video encoding device comprises: an image divider 110, a predictor 120, a subtractor 130, a transformer 140, a quantizer 145, a rearrangement unit 150, an entropy en...

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Abstract

The present embodiment provides an inverse quantization device and method for acquiring a quantization coefficient, estimating a quantization parameter in quantization groups or quantization parameter prediction group units, generating an inverse quantization matrix for adaptive quantization, and generating a conversion coefficient from the quantization coefficient by using the quantization parameter and the inverse quantization matrix.

Description

technical field [0001] The present invention relates to an inverse quantization device and method used in a video decoding device. More particularly, the present invention relates to an inverse quantization apparatus and method for obtaining quantized coefficients, calculating quantization parameters, generating an inverse quantization matrix, and generating transform coefficients from the quantized coefficients using the quantization parameters and the inverse quantization matrix. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. [0003] Since the amount of video data is larger than the amount of voice data or still image data, storing or transmitting video data without compression processing requires a large amount of hardware resources including memory. [0004] Correspondingly, when video data is stored or transmitted, an encoder is usually used to compr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/124H04N19/182H04N19/70H04N19/105H04N19/186
CPCH04N19/124H04N19/119H04N19/50H04N19/91H04N19/176H04N19/103
Inventor 沈东圭朴时奈李钟石朴胜煜林和平
Owner HYUNDAI MOTOR CO LTD