Invention Grant
- Patent Title: Methods and systems for generating color remapping information supplemental enhancement information messages for video
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Application No.: US15436313Application Date: 2017-02-17
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Publication No.: US10397443B2Publication Date: 2019-08-27
- Inventor: Adarsh Krishnan Ramasubramonian , Joel Sole Rojals , Dmytro Rusanovskyy , Done Bugdayci Sansli , Marta Karczewicz
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agency: Polsinelli LLP
- Main IPC: H04N1/60
- IPC: H04N1/60 ; G06T7/90 ; H04N19/70 ; H04N19/186

Abstract:
Systems, methods, and computer readable media are described for providing improved color remapping. In some examples, a video bitstream is obtained that includes a plurality of pictures having a first color characteristic. A color remapping information (CRI) supplemental enhancement information (SEI) message is identified from the video bitstream. A restriction is placed on the CRI SEI message such that a value of a syntax element of the CRI SEI message is restricted based on a condition. One or more samples of the plurality of pictures is remapped from the first color characteristic to a second color characteristic using a color remapping model of the CRI SEI message according to the restriction. In some cases, the condition is a chroma format of the plurality of pictures, in which case the value of the syntax element of the CRI SEI message is restricted based on the chroma format. In some cases, the condition is a color remap value identifying a purpose of the color remapping model of the CRI SEI message, in which case the value of the syntax element of the CRI SEI message is restricted based on the color remap value.
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