Method for decoding video and apparatus therefor and method for encoding video and apparatus therefor

A video decoding, horizontal direction technology, applied in the field of entropy decoding and entropy encoding, can solve the problem of zero data transformation, and achieve the effect of improving efficiency, improving entropy encoding and decoding efficiency, and improving encoding and decoding efficiency.

Active Publication Date: 2020-09-29
SAMSUNG ELECTRONICS CO LTD
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Problems solved by technology

In particular, since image pixel values ​​in the spatial domain are represented as prediction errors by inter prediction or intra prediction of the codec, many data may be transformed to zero when frequency transformation is performed on the prediction error

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  • Method for decoding video and apparatus therefor and method for encoding video and apparatus therefor
  • Method for decoding video and apparatus therefor and method for encoding video and apparatus therefor
  • Method for decoding video and apparatus therefor and method for encoding video and apparatus therefor

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Embodiment Construction

[0063] Hereinafter, "image" may indicate a still image or a moving image of a video, ie, the video itself.

[0064] Hereinafter, "sample" indicates data assigned to a sampling position of an image, and is data to be processed. For example, pixels in an image in the spatial domain may be samples.

[0065] Hereinafter, 'current block (Current Block)' may indicate a block of an image to be encoded or decoded.

[0066] Figure 1a A block diagram of a video decoding device according to various embodiments is shown.

[0067] The video decoding device 100 according to various embodiments may include an entropy decoding unit 105 and an image restoration unit 120 .

[0068] The entropy decoding unit 105 may obtain syntax element information received from a bitstream, and perform entropy decoding on the syntax element information. At this time, the syntax element information received from the bitstream may be various kinds of syntax element information on an image.

[0069] The entr...

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Abstract

Disclosed is a method for decoding video, comprising: determining a scan area containing all of effective transform coefficients in a current block; scanning information on the transform coefficientsin the scan area according to a predetermined scan order; performing binary arithmetic decoding on the basis of information on the scanned transform coefficients to generate binary arithmetic decodedinformation; performing inverse binarization on the binary arithmetic decoded information to obtain the information on the transform coefficients of the current block; performing inverse quantizationand inverse transform on the basis of the information on the transform coefficients of the current block to generate a residual block of the current block; and restoring the current block on the basisof the generated residual block. According to the disclosed video decoding method, the binary arithmetic decoding may be performed by using a context model determined on the basis of at least one ofthe size and the shape of the current block.

Description

technical field [0001] It relates to a video decoding method and a video encoding method. More specifically, entropy decoding and entropy coding are involved. Background technique [0002] With the development and popularization of hardware capable of playing and storing high-resolution or high-quality video content, there is an increasing demand for video codecs that efficiently perform encoding or decoding on high-resolution or high-quality video content. According to existing video codecs, videos are encoded with limited encoding methods through tree-structure-based coding units. [0003] Image data in the spatial domain is transformed into coefficients in the frequency domain by using a frequency transform. A video codec divides an image into blocks having a predetermined size, and performs encoding of frequency coefficients in block units by performing discrete cosine transform (DCT) for each block to perform fast operation of frequency transform. Compared to image d...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/129H04N19/18H04N19/13H04N19/124H04N19/176
CPCH04N19/124H04N19/129H04N19/13H04N19/176H04N19/18
Inventor 朴银姬
Owner SAMSUNG ELECTRONICS CO LTD
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