Signaling a cancel flag in a video bitstream

Patent metadata

Field	Value
Publication number	US-11706398-B2
Application number	US-202016886946-A
Country	US
Kind code	B2
Filing date	May 29, 2020
Priority date	Mar 21, 2018
Publication date	Jul 18, 2023
Grant date	Jul 18, 2023

Abstract

A method of coding implemented by a video encoder. The method includes encoding a representation of video data into a bitstream, the bitstream being prohibited from including a fisheye supplemental enhancement information (SEI) message and one of a projection indication SEI message and a frame packing indication SEI message that both apply to any particular coded picture in the bitstream; and transmitting the bitstream to the video decoder.

First claim

What is claimed is:

1. A method of coding implemented by a video encoder, comprising:
encoding a frame packing arrangement supplemental enhancement information (SEI) message that applies to a picture into a bitstream, the frame packing arrangement SEI message including a frame packing arrangement cancel flag equal to zero to indicate that a second SEI message that applies to the picture and has a second cancel flag equal to zero is not present, wherein the second SEI message is a different type of SEI message than the frame packing SEI message, and wherein the frame packing arrangement cancel flag equal to zero also indicates that a video decoder shall ignore SEI messages of the different type; and
transmitting the bitstream toward the video decoder.

2. The method of claim 1 , wherein the second SEI message corresponds to omnidirectional video.

3. The method of claim 1 , wherein the second cancel flag corresponds to omnidirectional video.

4. The method of claim 1 , wherein the second SEI message comprises a fisheye video information SEI message.

5. The method of claim 1 , wherein the second cancel flag comprises a fisheye_cancel_flag.

6. A method of coding implemented by a video decoder, comprising:
receiving an encoded bitstream containing a frame packing arrangement supplemental enhancement information (SEI) message that applies to a picture, the frame packing arrangement SEI message including a frame packing arrangement cancel flag equal to zero to indicate that a second SEI message that applies to the picture and has a second cancel flag equal to zero is not present, wherein the second SEI message is a different type of SEI message than the frame packing SEI message, and wherein the frame packing arrangement cancel flag equal to zero also indicates that the video decoder shall ignore SEI messages of the different type; and
decoding the encoded bitstream according to the frame packing arrangement cancel flag.

7. The method of claim 6 , wherein the second SEI message corresponds to omnidirectional video.

8. The method of claim 6 , wherein the second cancel flag corresponds to omnidirectional video.

9. The method of claim 6 , wherein the second SEI message comprises a fisheye video information SEI message.

10. The method of claim 6 , wherein the second cancel flag comprises a fisheye_cancel_flag.

11. A video coding apparatus, comprising:
a memory storing instructions;
one or more processors coupled to the memory, the one or more processors configured to execute the instructions to cause the video coding apparatus to:
encode a frame packing arrangement supplemental enhancement information (SEI) message that applies to a picture into a bitstream, the frame packing arrangement SEI message including a frame packing arrangement cancel flag equal to zero to indicate that a second SEI message that applies to the picture and has a second cancel flag equal to zero is not present, wherein the second SEI message is a different type of SEI message than the frame packing SEI message, and wherein the frame packing arrangement cancel flag equal to zero also indicates that a video decoder shall ignore SEI messages of the different type; and
transmit the bitstream toward the video decoder.

12. The video coding apparatus of claim 11 , wherein the second SEI message corresponds to omnidirectional video.

13. The video coding apparatus of claim 11 , wherein the second cancel flag corresponds to omnidirectional video.

14. The video coding apparatus of claim 11 , wherein the second SEI message comprises a fisheye video information SEI message.

15. The video coding apparatus of claim 11 , wherein the second cancel flag comprises a fisheye_cancel_flag.

16. A video coding apparatus, comprising:
a memory storing instructions;
one or more processors coupled to the memory, the one or more processors configured to execute the instructions to cause the video coding apparatus to:
receive an encoded bitstream containing a frame packing arrangement supplemental enhancement information (SEI) message that applies to a picture, the frame packing arrangement SEI message including a frame packing arrangement cancel flag equal to zero to indicate that a second SEI message that applies to the picture and has a second cancel flag equal to zero is not present, wherein the second SEI message is a different type of SEI message than the frame packing SEI message, and wherein the frame packing arrangement cancel flag equal to zero also indicates that a video decoder shall ignore SEI messages of the different type; and
decode the encoded bitstream according to the frame packing arrangement cancel flag.

17. The video coding apparatus of claim 16 , wherein the second SEI message corresponds to omnidirectional video.

18. The video coding apparatus of claim 16 , wherein the second cancel flag corresponds to omnidirectional video.

19. The video coding apparatus of claim 16 , wherein the second SEI message comprises a fisheye video information SEI message.

20. The video coding apparatus of claim 16 , wherein the second cancel flag comprises a fisheye_cancel_flag.

Assignees

• Huawei Techologies Co Ltd
• Huawei Tech Co Ltd

Inventors

• Wang Ye-Kui

Classifications

• H04N13/194 Primary

  Transmission of image signals · CPC title

• H04N13/161

  Encoding, multiplexing or demultiplexing different image signal components (for multi-view video sequence encoding H04N19/597) · CPC title

• H04N19/176

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

• H04N19/184

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

• H04N19/597 Primary

  specially adapted for multi-view video sequence encoding · CPC title