# US 2020/0288155 A1 · Video encoding and decoding method and apparatus using the same

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- Number: US 2020/0288155 A1
- Document ID: US20200288155A1
- Status: Published application
- Kind: A1
- Application number: 16/883,293
- Filed: 2020-05-26
- Published: 2020-09-10
- Earliest claimed: 2012-12-26
- 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/US20200288155A1

## CPC

- H04N 19/33: in the spatial domain
- H04N 19/30: using hierarchical techniques, e.g. scalability (H04N19/63 takes precedence)
- H04N 19/597: specially adapted for multi-view video sequence encoding
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

Disclosed is technology associated with video encoding and decoding having a structure including one or more layers (quality, spatial, and view) and technology associated with a method that predicts an higher layer signal by using one or more reference layers in encoding and decoding an higher layer. In more detail, an interlayer prediction is capable of being performed by considering a characteristic of each layer by separating a spatial and quality reference layer list constituted by spatial and quality layers to be referred at the same view as a target layer and a view reference layer list constituted by the same spatial and quality layers as a target layer in encoding and decoding encoding and decoding pictures of an higher layer in encoding and decoding encoded and decoded pictures of the higher layer to improve encoding and decoding efficiency.

## Claims

### Claim 1

A video decoding method supporting layers, the method comprising:
constructing a reference layer list comprising one or more reference layers;
constructing, based on the constructed reference layer list, a reference picture list comprising a decoded picture of the one or more reference layers; and
predicting and decoding the picture of a target layer by referring to the reference picture list,
wherein the decoded picture of the one or more reference layers included in the reference picture list is treated as a long-term reference picture and
wherein
the constructing of the reference picture list comprises:
configuring a first set comprising the decoded picture of the reference layer;
configuring a second set comprising pictures on a same layer as the picture of the target layer; and
combining the first set and the second set.

### Claim 2 (depends on 1)

The method of claim 1, wherein the constructing of the reference layer list comprises constructing a spatial and quality reference layer list, and the view reference layer list, and
the target layer is capable of referring to layers of the spatial and quality reference layer list during the decoding.

### Claim 3 (depends on 2)

The method of claim 2, wherein the layers of the spatial and quality reference layer list comprise layers having the same view as the target layer.

### Claim 4 (depends on 2)

The method of claim 2, wherein the layers of the view reference layer list comprise layers having the same spatial features and quality as the target layer.

### Claim 5 (depends on 1)

The method of claim 1, wherein a picture in the first set is the long-term reference picture.

### Claim 6 (depends on 1)

The method of claim 1, wherein the pictures in the first set are added to any one of a first, second, and last lists of the reference picture list.

### Claim 7

A video encoding method, the method comprising:
generating a prediction block of a target block in a picture of a target layer by referring to one or more reference pictures;
reconstructing the target block using the prediction block;
constructing a reference layer list comprising one or more reference layers; and
constructing, based on the constructed reference layer list, a reference picture list comprising a decoded picture of the one or more reference layers,
wherein the decoded picture of the reference layer included in the reference picture list is treated as a long-term reference picture, and
wherein the constructing of the reference picture list comprises
configuring a first set comprising the decoded picture of the reference layer,
configuring a second set comprising pictures on a same layer as the picture of the target layer, and
combining the first set and the second set.

### Claim 8

A non-transitory computer-readable medium storing a bitstream, wherein the bitstream is generated by a video encoding method, the method comprising:
generating a prediction block of a target block in a picture of a target layer by referring to one or more reference pictures;
reconstructing the target block using the prediction block;
constructing a reference layer list comprising one or more reference layers; and
constructing, based on the constructed reference layer list, a reference picture list comprising a decoded picture of the one or more reference layers,
wherein the decoded picture of the reference layer included in the reference picture list is treated as a long-term reference picture, and
wherein the constructing of the reference picture list comprises
configuring a first set comprising the decoded picture of the reference layer,
configuring a second set comprising pictures on a same layer as the picture of the target layer, and
combining the first set and the second set.