Encoder, decoder and corresponding methods for sub-block partitioning mode

Patent metadata

Field	Value
Publication number	US-12439045-B2
Application number	US-202418604198-A
Country	US
Kind code	B2
Filing date	Mar 13, 2024
Priority date	Jun 21, 2019
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

A method of coding implemented by a decoding device, comprising obtaining a bitstream; obtaining a value of an indicator for a current block according to the bitstream; obtaining a value of a first parameter for the current block and a value of a second parameter for the current block, according to the value of the indicator and a predefined lookup table; obtaining a value of a sample distance for a sample which is located in the current block, according to the value of the first parameter and the value of the second parameter; obtaining a prediction value for the sample, according to the value of the sample distance for the sample.

First claim

What is claimed is:

1. A method of coding implemented by a decoding device, the method comprising:
obtaining a value of an indicator for a current block according to a bitstream;
obtaining a value of a first parameter for the current block and a value of a second parameter for the current block according to the value of the indicator and a predefined lookup table;
obtaining a value of a sample distance for a sample which is located in the current block according to the value of the first parameter and the value of the second parameter; and
obtaining a prediction value for the sample according to the value of the sample distance for the sample, including:
determining two weighting factors corresponding to the two sub-blocks according to the sample distance value; and
obtaining the prediction value for the sample according to a first prediction value for a first sub-block of the two sub-blocks based on a first prediction mode, a second prediction value for a second sub-block of the two sub-blocks based on a second prediction mode and the two weighting factors;
wherein the predefined lookup table is:

merge_gpm_partition_idx
0
1
2
3
4
5
6
7

angleIdx
0
0
2
2
2
2
3
3

distanceIdx
1
3
0
1
2
3
0
1

merge_gpm_partition_idx
16
17
18
19
20
21
22
23

angleIdx
5
5
8
8
11
11
11
11

distanceIdx
2
3
1
3
0
1
2
3

merge_gpm_partition_idx
32
33
34
35
36
37
38
39

angleIdx
14
14
14
14
16
16
18
18

distanceIdx
0
1
2
3
1
3
1
2

merge_gpm_partition_idx
48
49
50
51
52
53
54
55

angleIdx
21
21
24
24
27
27
27
28

distanceIdx
2
3
1
3
1
2
3
1

merge_gpm_partition_idx
8
9
10
11
12
13
14
15

angleIdx
3
3
4
4
4
4
5
5

distanceIdx
2
3
0
1
2
3
0
1

merge_gpm_partition_idx
24
25
26
27
28
29
30
31

angleIdx
12
12
12
12
13
13
13
13

distanceIdx
0
1
2
3
0
1
2
3

merge_gpm_partition_idx
40
41
42
43
44
45
46
47

angleIdx
18
19
19
19
20
20
20
21

distanceIdx
3
1
2
3
1
2
3
1

merge_gpm_partition_idx
56
57
58
59
60
61
62
63

angleIdx
28
28
29
29
29
30
30
30

distanceIdx
2
3
1
2
3
1
2
3

Assignees

• Huawei Tech Co Ltd

Inventors

• Esenlik Semih
• Blaeser Max
• Zhao Zhijie
• Gao Han
• Kotra Anand Meher
• Wang Biao
• Alshina Elena Alexandrovna

Classifications

• H04N19/184

  the unit being bits, e.g. of the compressed video stream · CPC title

• H04N19/176

  the region being a block, e.g. a macroblock · CPC title

• H04N19/159

  Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction · CPC title

• H04N19/105 Primary

  Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction · CPC title

• H04N19/70

  characterised by syntax aspects related to video coding, e.g. related to compression standards · CPC title