# US 11,909,973 B2 · Video decoding method and device

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- Number: US 11,909,973 B2
- Document ID: US11909973B2
- Status: Granted
- Kind: B2
- Application number: 18/048,816
- Filed: 2022-10-21
- Published: 2023-03-02
- Granted: 2024-02-20
- Earliest claimed: 2020-03-27
- Assignees: Atins Inc.
- Applicants: Atins Inc.
- Inventors: Sun Young Lee
- Web page: https://patentgrep.com/patent/US11909973B2

## CPC

- H04N 19/12: Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264
- H04N 19/122: Selection of transform size, e.g. 8x8 or 2x4x8 DCT; Selection of sub-band transforms of varying structure or type
- H04N 19/103: Selection of coding mode or of prediction mode
- H04N 19/132: Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
- H04N 19/136: Incoming video signal characteristics or properties
- H04N 19/157: Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter
- H04N 19/176: the region being a block, e.g. a macroblock
- H04N 19/18: the unit being a set of transform coefficients
- H04N 19/44: Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
- H04N 19/60: using transform coding
- H04N 19/625: using discrete cosine transform [DCT]
- H04N 19/70: characterised by syntax aspects related to video coding, e.g. related to compression standards
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

Provided are a video decoding method and device. This specification provides a video decoding method comprising the steps of: acquiring a parameter indicating whether a multiple transform set is applicable to a block to be decoded, as well as information about the width of the block to be decoded and the height of the block to be decoded; determining the transform type of the block to be decoded on the basis of at least one of the parameter indicating whether a multiple transform set is applicable, or the information about the width and height of the block to be decoded, and setting a zero-out region of the block to be decoded; and inverse-transforming the block to be decoded on the basis of the zero-out region of the block to be decoded and the result of determining the transform type.

## Claims

### Claim 1

A video decoding method performed by a video decoding device, the method comprising:
obtaining a parameter indicating whether a multiple transform set (MTS) can be applied to a decoding block, and information on a size of the decoding block;
determining a transform type of the decoding block based on the parameter indicating whether the multiple transform set (MTS) can be applied to the decoding block and the information on the size of the decoding block; and
setting a zero-out area of the decoding block based on the parameter indicating whether the multiple transform set (MTS) can be applied to the decoding block and the information on the size of the decoding block,
wherein whether or not syntax information with regard to a maximum transform size in which a transform process can be performed for the decoding block is signaled to the video decoding device depends on whether a block size is greater than a predetermined size.