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Method and apparatus for accelerating inverse transform, and method and apparatus for decoding video stream

一种逆变换、变换系数的技术，应用在解码视频流领域，能够解决复杂度高等问题

Active Publication Date: 2016-07-06
SAMSUNG ELECTRONICS CO LTD
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Therefore, the complexity is very high when the video decoder performs the inverse transform

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  • Method and apparatus for accelerating inverse transform, and method and apparatus for decoding video stream
  • Method and apparatus for accelerating inverse transform, and method and apparatus for decoding video stream
  • Method and apparatus for accelerating inverse transform, and method and apparatus for decoding video stream

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[0029] BEST MODE FOR CARRYING OUT THE INVENTION

[0030] According to one or more embodiments, a method of decoding a bitstream includes: receiving an encoded bitstream; extracting transform coefficients from the received bitstream; determining a block including at least one non-zero transform coefficient from among the extracted transform coefficients and generating decoded video data by inverse transforming the transform coefficients in the block using the determined locations.

[0031] According to one or more embodiments, a video decoder includes: a variable length decoding (VLD) module for extracting transform coefficients from an encoded bitstream; a maximum position calculator for extracting transform coefficients from among the extracted transform coefficients determining a maximum position of a block including at least one non-zero transform coefficient; and an inverse transformer for generating decoded video data by inverse transforming transform coefficients in the ...

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Abstract

A method of decoding a bitstream, a method of accelerating an inverse transform, an apparatus, a video decoder, and a non-transitory computer-readable recording medium are provided. The method includes receiving an encoded bitstream, extracting transformation coefficients from the received bitstream, determining a position of a block including at least one nonzero transformation coefficient from among the extracted transformation coefficients, and generating decoded video data by inverse-transforming transformation coefficients in the block by using the determined position.

Description

technical field [0001] One or more embodiments relate to methods and apparatus for decoding video streams. Background technique [0002] A video encoder transforms data in the spatial domain into data in the frequency domain. Therefore, a video encoder can perform compression by using data in the frequency domain. [0003] A video decoder inverse transforms data in the frequency domain to data in the spatial domain. The throughput of the inverse transform can be increased as the basic units of the inverse transform increase. In High Efficiency Video Coding (HEVC), the basic unit of inverse transform can be increased up to 32x32, for example. Thus, the complexity is very high when the video decoder performs the inverse transform. Therefore, a method of increasing the processing speed of inverse transform is desired. Contents of the invention [0004] solution [0005] One or more embodiments include methods and apparatus for decoding a video stream, wherein the throug...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/60H04N19/50
CPCH04N19/122H04N19/60H04N19/136H04N19/18H04N19/176H04N19/00H04N19/44
Inventor 李相祚金度亨宋准镐
Owner SAMSUNG ELECTRONICS CO LTD
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