# US 10,455,241 B2 · Image encoding/decoding method and device

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- Number: US 10,455,241 B2
- Document ID: US10455241B2
- Status: Granted
- Kind: B2
- Application number: 16/136,415
- Filed: 2018-09-20
- Published: 2019-03-21
- Granted: 2019-10-22
- Earliest claimed: 2013-01-07
- Assignees: Electronics and Telecommunications Research Institute
- Applicants: Electronics and Telecommunications Research Institute
- Inventors: Jung Won Kang; Ha Hyun Lee; Jin Ho Lee; Jin Soo Choi; Jin Woong Kim
- Web page: https://patentgrep.com/patent/US10455241B2

## CPC

- H04N 19/187: the unit being a scalable video layer
- H04N 19/30: using hierarchical techniques, e.g. scalability (H04N19/63 takes precedence)
- H04N 19/423: characterised by memory arrangements (H04N19/433 takes precedence)
- H04N 19/70: characterised by syntax aspects related to video coding, e.g. related to compression standards
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

Disclosed are an image encoding/decoding method and device supporting a plurality of layers. The image decoding method supporting the plurality of layers comprises the steps of; receiving a bitstream comprising the plurality of layers; and decoding the bitstream so as to acquire maximum number information about sublayers with respect to each of the plurality of layers.

## Claims

### Claim 1

A method for picture decoding supporting layers, the method comprising:
receiving a bitstream comprising the layers;
acquiring information on a maximum number of sub-layers for each of the layers by decoding the bitstream;
acquiring a residual block of a current block by decoding the bitstream; and
generating a reconstructed block of the current block using the residual block,
wherein the information on the maximum number of sub-layers is included in video parameter set extension information and signaled, and
wherein a video parameter set comprises information on a maximum number of sub-layers, and
in response to the video parameter set extension information not comprising the information on a maximum number of sub-layers for a layer among the layers, the maximum number of sub-layers for the layer is derived based on the information included in the video parameter set.

### Claim 2 (depends on 1)

The method of claim 1, wherein the information on the maximum number of sub-layers for each of the layers is acquired in accordance with flag information representing whether the information on the maximum number of sub-layers is present.

### Claim 3 (depends on 1)

The method of claim 1, wherein the acquiring of the information on the maximum number of sub-layers for each of the layers comprises acquiring the information on the maximum number of sub-layers for a layer in which the maximum number of sub-layers signaled in the video parameter extension information is different from the maximum number of sub-layers signaled in a video parameter set.

### Claim 4 (depends on 3)

The method of claim 3, wherein the acquiring of the information on the maximum number of sub-layers for each of the layers further comprises acquiring the information on the maximum number of sub-layers for each of the layers based on flag information representing whether the maximum number of sub-layers signaled in the video parameter extension information is equal to the maximum number of sub-layers signaled in the video parameter set.

### Claim 5

A method for picture encoding supporting layers, the method comprising:
acquiring information on a maximum number of sub-layers for each of the layers;
acquiring a reconstructed block of a current block;
acquiring a residual block of the current block using the reconstructed block; and
transmitting a bitstream comprising the information on the maximum number of sub-layers by encoding the information on the maximum number of sub-layers for each of the layers, and comprising information on the residual block by encoding the residual block,
wherein the information on the maximum number of sub-layers is included in video parameter set extension information and signaled, and
wherein a video parameter set comprises information on a maximum number of sub-layers, and
in response to the video parameter set extension information not comprising the information on a maximum number of sub-layers for a layer among the layers, the maximum number of sub-layers for the layer is derived based on the information included in the video parameter set.

### Claim 6 (depends on 5)

The method of claim 5, further comprising determining flag information representing whether the information on the maximum number of sub-layers is present.

### Claim 7 (depends on 5)

The method of claim 5, wherein the acquiring of the information on the maximum number of sub-layers for each of the layers comprises
determining the information on the maximum number of sub-layers for a layer in which the maximum number of sub-layers signaled in the video parameter extension information is different from the maximum number of sub-layers signaled in a video parameter set.

### Claim 8

A non-transitory computer-readable storage medium storing a bitstream, wherein the bitstream is generated by a method for picture encoding supporting layers, the method comprising:
acquiring information on a maximum number of sub-layers for each of the layers;
acquiring a reconstructed block of a current block;
acquiring a residual block of the current block using the reconstructed block; and
transmitting a bitstream comprising the information on the maximum number of sub-layers by encoding the information on the maximum number of sub-layers for each of the layers, and comprising information on the residual block by encoding the residual block,
wherein the information on the maximum number of sub-layers is included in video parameter set extension information and signaled, and
wherein a video parameter set comprises information on a maximum number of sub-layers, and
in response to the video parameter set extension information not comprising the information on a maximum number of sub-layers for a layer among the layers, the maximum number of sub-layers for the layer is derived based on the information included in the video parameter set.