Back to results
US 2023/0068404 A1Published application
Systems and methods for signaling subpicture information in video coding
AssigneeSharp Kabushiki Kaisha
InventorSACHIN G. DESHPANDE
Life of this patent
Estimating the term…
Abstract
A method of decoding video data is disclosed. The method comprising: parsing a first syntax element indicating a number of subpictures in a picture; for each of subpictures which are other than a first subpicture, parsing second syntax elements indicating a position of the each of subpictures; inferring a top-left position of the first subpicture equal to a top-left position of the picture.
Claims4
A method of decoding video data, the method comprising:
- parsing a first syntax element indicating a number of subpictures in a picture;
- for each of subpictures which are other than a first subpicture, parsing second syntax elements indicating a position of the each of subpictures;
- inferring a top-left position of the first subpicture equal to a top-left position of the picture;
- for each of subpictures which are other than a last subpicture, parsing a third syntax element indicating a width of the each of subpictures and parsing a fourth syntax element indicating a height of the each of subpictures;
- and
- inferring a size of the last subpicture,
- wherein,
- parsing the third syntax element includes determining a length in bits of the third syntax element according to following Ceil(Log2((maximum picture width in luma samples+coding tree block width in luma samples−1)/coding tree block width in luma samples)), and
- parsing the fourth syntax element includes determining a length in bits of the fourth syntax element according to following Ceil(Log2((maximum picture height in luma samples+coding tree block height in luma samples−1)/coding tree block height in luma samples)).
6 more elements
(canceled)
A device comprising one or more processors configured to:
- parse a first syntax element indicating a number of subpictures in a picture;
- for each of subpictures which are other than a first subpicture, parse second syntax elements indicating a position of the each of subpictures;
- infer a top-left position of the first subpicture equal to a top-left position of the picture;
- for each of subpictures which are other than a last subpicture, parse a third syntax element indicating a width of the each of subpictures and parse a fourth syntax element indicating a height of the each of subpictures;
- and
- infer a size of the last subpicture,
- wherein,
- a length in bits of the third syntax element is determined according to following Ceil(Log2((maximum picture width in luma samples+coding tree block width in luma samples−1)/coding tree block width in luma samples)), and
- a length in bits of the fourth syntax element is determined according to following Ceil(Log2((maximum picture height in luma samples+coding tree block height in luma samples−1)/coding tree block height in luma samples)).
6 more elements
Dependencies are inferred from the claim text.