Methods and systems for generating and processing content color volume messages for video

Patent metadata

Field	Value
Publication number	US-2017339418-A1
Application number	US-201715594207-A
Country	US
Kind code	A1
Filing date	May 12, 2017
Priority date	May 17, 2016
Publication date	Nov 23, 2017
Grant date	—

Abstract

Systems, methods, and computer readable media are described for processing content color volume messages. In some examples, video data is obtained. The video data can include video data obtained from a camera, encoded video data, or decoded video data. Content color volume information associated with the video data is processed. The content color volume information is indicative of the content color volume of one or more pictures of the video data. For example, the content color volume information includes a first luminance value associated with a minimum luminance of the one or more pictures, a second luminance value associated with a maximum luminance of the one or more pictures, and one or more chromaticity coordinates of one or more color primaries describing a color gamut of the one or more pictures.

First claim

What is claimed is:

1 . A method of processing video data, the method comprising:
obtaining the video data; and processing content color volume information associated with the video data, the content color volume information being indicative of the content color volume of one or more pictures of the video data, wherein the content color volume information includes a first luminance value associated with a minimum luminance of the one or more pictures, a second luminance value associated with a maximum luminance of the one or more pictures, and one or more chromaticity coordinates of one or more color primaries describing a color gamut of the one or more pictures.

2 . The method of claim 1 , wherein the first luminance value includes a normalized minimum luminance value, and wherein the second luminance value includes a normalized maximum luminance value.

3 . The method of claim 1 , wherein the first luminance value is used to derive a minimum luminance value of the one or more pictures, and wherein the second luminance value is used to derive a maximum luminance value of the one or more pictures.

4 . The method of claim 1 , wherein a syntax element is provided with the video data, the syntax element indicating that a subset of the content color volume information is signaled.

5 . The method of claim 1 , wherein the content color volume information is signaled using one or more syntax elements of a supplemental enhancement information (SEI) message.

6 . The method of claim 1 , wherein the one or more chromaticity coordinates include three chromaticity coordinates specifying three color primaries of the one or more pictures.

7 . The method of claim 6 , wherein the three chromaticity coordinates include a green chromaticity coordinate for a green color primary of the one or more pictures, a red chromaticity coordinate for a red color primary of the one or more pictures, and a chromaticity blue coordinate for a blue color primary of the one or more pictures.

8 . An apparatus comprising:
a memory configured to store video data; and a processor configured to:
obtain the video data; and
process content color volume information associated with the video data, the content color volume information being indicative of the content color volume of one or more pictures of the video data, wherein the content color volume information includes a first luminance value associated with a minimum luminance of the one or more pictures, a second luminance value associated with a maximum luminance of the one or more pictures, and one or more chromaticity coordinates of one or more color primaries describing a color gamut of the one or more pictures.

9 . The apparatus of claim 8 , wherein the first luminance value includes a normalized minimum luminance value, and wherein the second luminance value includes a normalized maximum luminance value.

10 . The apparatus of claim 8 , wherein the first luminance value is used to derive a minimum luminance value of the one or more pictures, and wherein the second luminance value is used to derive a maximum luminance value of the one or more pictures.

11 . The apparatus of claim 8 , wherein a syntax element is provided with the video data, the syntax element indicating that a subset of the content color volume information is signaled.

12 . The apparatus of claim 8 , wherein the content color volume information is signaled using one or more syntax elements of a supplemental enhancement information (SEI) message.

13 . The apparatus of claim 8 , wherein the one or more chromaticity coordinates include three chromaticity coordinates specifying three color primaries of the one or more pictures.

14 . The apparatus of claim 13 , wherein the three chromaticity coordinates include a green chromaticity coordinate for a green color primary of the one or more pictures, a red chromaticity coordinate for a red color primary of the one or more pictures, and a chromaticity blue coordinate for a blue color primary of the one or more pictures.

15 . The apparatus of claim 8 , wherein the apparatus comprises a mobile device with a camera for capturing pictures.

16 . The apparatus of claim 8 , further comprising:
a display for displaying the video data.

17 . A non-transitory computer-readable medium having stored thereon instructions that, when executed by one or more processors, cause the one or more processor to:
obtain video data; and process content color volume information associated with the video data, the content color volume information being indicative of the content color volume of one or more pictures of the video data, wherein the content color volume information includes a first luminance value associated with a minimum luminance of the one or more pictures, a second luminance value associated with a maximum luminance of the one or more pictures, and one or more chromaticity coordinates of one or more color primaries describing a color gamut of the one or more pictures.

18 . The non-transitory computer-readable medium of claim 17 , wherein the first luminance value includes a normalized minimum luminance value, and wherein the second luminance value includes a normalized maximum luminance value.

19 . The non-transitory computer-readable medium of claim 17 , wherein the first luminance value is used to derive a minimum luminance value of the one or more pictures, and wherein the second luminance value is used to derive a maximum luminance value of the one or more pictures.

20 . The non-transitory computer-readable medium of claim 17 , wherein a syntax element is provided with the video data, the syntax element indicating that a subset of the content color volume information is signaled.

21 . The non-transitory computer-readable medium of claim 17 , wherein the content color volume information is signaled using one or more syntax elements of a supplemental enhancement information (SEI) message.

22 . The non-transitory computer-readable medium of claim 17 , wherein the one or more chromaticity coordinates include three chromaticity coordinates specifying three color primaries of the one or more pictures.

23 . The non-transitory computer-readable medium of claim 22 , wherein the three chromaticity coordinates include a green chromaticity coordinate for a green color primary of the one or more pictures, a red chromaticity coordinate for a red color primary of the one or more pictures, and a chromaticity blue coordinate for a blue color primary of the one or more pictures.

24 . An apparatus comprising:
means for obtaining the video data; and means for processing content color volume information associated with the video data, the content color volume information being indicative of the content color volume of one or more pictures of the video data, wherein the content color volume information includes a first luminance value associated with a minimum luminance of the one or more pictures, a second luminance value associated with a maximum luminance of the one or more pictures, and one or more chromaticity coordinates of one or more color primaries describing a color gamut of the one or more pictures.

25 . The apparatus of claim 24 , wherein the first luminance value includes a normalized minimum luminance value, and wherein the second luminance value includes a normalized maximum luminance value.

26 . The apparatus of claim 24 , wherein the f

Assignees

• Qualcomm Inc

Inventors

• Ramasubramonian Adarsh Krishnan
• Bugdayci Sansli Done
• Sole Rojals Joel
• Rusanovskyy Dmytro
• Karczewicz Marta

Classifications

• H04N19/186 Primary

  the unit being a colour or a chrominance component · CPC title

• H04N19/70 Primary

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

• H04N19/136

  Incoming video signal characteristics or properties · CPC title

• H04N19/176 Primary

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