Method and apparatus for decoding video bitstream, method and apparatus for generating video bitstream, storage medium, and electronic device

A method for generating a video bitstream, comprising:

• setting a first parameter according to a starting position of a first slice in a video picture;
• and
• writing the first parameter into a bitstream of a picture-layer data unit of the video picture;
• calculating a second parameter according to a starting position coordinate parameter of a slice in the video picture and the first parameter, and writing the second parameter into a bitstream corresponding to slice-layer header information, the second parameter being used for determining a starting position of the slice in the video picture;
• wherein the first parameter comprises coordinate information of the video picture and stride information of the video picture, and the second parameter comprises coordinate information of the slice;
• wherein the coordinate information of the video picture comprises a coordinate of the reference position of the slice in the video picture in a horizontal direction and a coordinate of the reference position of the slice in the video picture in a vertical direction;
• the stride information of the video picture comprises a stride value of the video picture in a horizontal direction and a stride value of the video picture in a vertical direction, or the stride information of the video picture comprises a stride value of the video picture in a horizontal direction;
• the coordinate information of the slice comprises a position coordinate of the slice in a horizontal direction and a position coordinate of the slice in a vertical direction.

An apparatus for decoding a video bitstream, comprising:

• a first acquisition module, configured to acquire a first parameter of a reference position of a slice in a video picture;
• a second acquisition module, configured to acquire a second parameter of the slice, the second parameter being used for determining a starting position of the slice in the video picture;
• and
• a calculation module, configured to calculate a starting position coordinate parameter of the slice in the video picture according to the first parameter and the second parameter;
• wherein the first parameter comprises coordinate information of the video picture and stride information of the video picture, and the second parameter comprises coordinate information of the slice;
• wherein the coordinate information of the video picture comprises a coordinate of the reference position of the slice in the video picture in a horizontal direction and a coordinate of the reference position of the slice in the video picture in a vertical direction;
• the stride information of the video picture comprises a stride value of the video picture in a horizontal direction and a stride value of the video picture in a vertical direction, or the stride information of the video picture comprises a stride value of the video picture in a horizontal direction;
• the coordinate information of the slice comprises a position coordinate of the slice in a horizontal direction and a position coordinate of the slice in a vertical direction.

An apparatus for generating a video bitstream, comprising:

• a setting module, configured to set a first parameter according to a starting position of a first slice in a video picture;
• and
• a generation module, configured to write the first parameter into a bitstream of a picture-layer data unit of the video picture;
• wherein the apparatus is further configured to, after the generation module writes the first parameter into the bitstream of the picture-layer data unit of the video picture, calculate a second parameter according to a starting position coordinate parameter of a slice in the video picture and the first parameter, and write the second parameter into a bitstream corresponding to slice-layer header information, the second parameter being used for determining a starting position of the slice in the video picture;
• wherein the first parameter comprises coordinate information of the video picture and stride information of the video picture, and the second parameter comprises coordinate information of the slice;
• wherein the coordinate information of the video picture comprises a coordinate of the reference position of the slice in the video picture in a horizontal direction and a coordinate of the reference position of the slice in the video picture in a vertical direction;
• the stride information of the video picture comprises a stride value of the video picture in a horizontal direction and a stride value of the video picture in a vertical direction, or the stride information of the video picture comprises a stride value of the video picture in a horizontal direction;
• the coordinate information of the slice comprises a position coordinate of the slice in a horizontal direction and a position coordinate of the slice in a vertical direction.