Granted Patent B2

US 12,368,899 · App. 18/940,641 · Granted Jul 22, 2025

Inventors: Tao Chen (Palo Alto, CA); Peng Yin (Ithaca, NY); Taoran Lu (Santa Clara, CA); Walter J. Husak (Simi Valley, CA)

Assignee: Dolby Laboratories Licensing Corporation

H04N19/70H04N19/14H04N19/186H04N19/20

Abstract

Claims (7)

1. An apparatus to generate source color volume information for an encoded bitstream, the apparatus comprising a processor, wherein the processor:

encodes video pictures to generate an encoded bitstream;

generates a supplemental enhancement information (SEI) message indicating source color volume information for the encoded bitstream, wherein the SEI message comprises:

normalized x and y chromaticity coordinates of one or more color primary components in the encoded bitstream, wherein the normalized x and y chromaticity coordinates are specified according to the CIE 1931 definition of x and y; and

luminance value parameters comprising a minimum, a maximum, and an average luminance value, wherein for one or more coded video pictures in the bitstream that are encoded in a letterbox format, the minimum, the maximum, and the average luminance values are for an active region of the one or more coded pictures in the letterbox format; and

generates a video stream that includes the encoded bitstream and the SEI message.

2. The apparatus of claim 1 , wherein the normalized x and y chromaticity coordinates are specified in increments of 0.00002.

Assignments (1)

Continuity (10)

References Cited (98)