# US 10,771,802 B2 · Method for color mapping a video signal based on color mapping data and method of encoding a video signal and color mapping data and corresponding devices > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,771,802 B2 - Document ID: US10771802B2 - Status: Granted - Kind: B2 - Application number: 16/446,930 - Filed: 2019-06-20 - Published: 2019-10-03 - Granted: 2020-09-08 - Earliest claimed: 2014-10-17 - Assignees: InterDigital VC Holdings, Inc. - Applicants: InterDigital VC Holdings, Inc. - Inventors: Pierre Andrivon; Sebastien Lasserre; Philippe Bordes - Web page: https://patentgrep.com/patent/US10771802B2 ## CPC - H04N 19/46: Embedding additional information in the video signal during the compression process (H04N19/517, H04N19/68, H04N19/70 take precedence) - G09G 5/02: characterised by the way in which colour is displayed {(details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607)} - G09G 5/04: using circuits for interfacing with colour displays - H04N 1/6058: {Reduction of colour to a range of reproducible colours, e.g. to ink- reproducible colour gamut} - H04N 9/67: for matrixing (camera processing pipelines for matrixing of colour signals H04N23/85) - H04N 19/117: Filters, e.g. for pre-processing or post-processing (sub-band filter banks H04N19/635) - H04N 19/136: Incoming video signal characteristics or properties - H04N 19/186: the unit being a colour or a chrominance component - H04N 19/44: Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder - H04N 19/70: characterised by syntax aspects related to video coding, e.g. related to compression standards - H04N 19/85: using pre-processing or post-processing specially adapted for video compression - G09G 2340/06: Colour space transformation - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) ## Abstract A method of color mapping a video signal represented in a first color volume from color mapping data to be applied on a video signal represented in a second color volume is disclosed. The method comprises: color mapping (14) said video signal represented in a first color volume from said first color volume into said second color volume in the case where said first and second color volumes are different; and color mapping (16) said color mapped video signal based on said color mapping data. ## Claims ### Claim 1 A method, comprising: encoding a video signal represented in a first color volume; encoding color mapping data; and encoding an indicator, wherein said indicator indicates whether (1) a color mapping based on said color mapping data is to be applied directly on said video signal represented in said first color volume or (2) said color mapping based on said color mapping data is to be applied on said video signal after a prior color mapping of said video signal from said first color volume into a second color volume different from said first color volume, and wherein said indicator further indicates said second color volume. ### Claim 2 (depends on 1) The method of claim 1, wherein said indicator is a binary flag. ### Claim 3 (depends on 1) The method of claim 1, wherein said encoding said video signal comprising, for a block of an image of said video signal: determining a prediction of said block; subtracting said prediction from said block to form a residual; and encoding said residual. ### Claim 4 (depends on 1) The method of claim 1, wherein said color mapping data is encoded in SEI (Supplemental Enhancement Information) message. ### Claim 5 (depends on 1) The method of claim 1, wherein said color mapping data represents a first piece-wise linear function applied to each color component, a three-by-three matrix applied to three color components, and a second piece-wise linear function applied to each color component. ### Claim 6 (depends on 1) The method of claim 1, wherein said indicator is encoded in a transport stream. ### Claim 7 An apparatus, comprising at least a processor configured to: encode a video signal represented in a first color volume; encode color mapping data; and encode an indicator, wherein said indicator indicates whether (1) a color mapping based on said color mapping data is to be applied directly on said video signal represented in said first color volume or (2) said color mapping based on said color mapping data is to be applied on said video signal after a prior color mapping of said video signal from said first color volume into a second color volume different from said first color volume, and wherein said indicator further indicates said second color volume. ### Claim 8 (depends on 7) The apparatus of claim 7, wherein said indicator is a binary flag. ### Claim 9 (depends on 7) The apparatus of claim 7, wherein said at least a processor is configured to encode said video signal, for a block of an image of said video signal, by performing: determining a prediction of said block; subtracting said prediction from said block to form a residual; and encoding said residual. ### Claim 10 (depends on 7) The apparatus of claim 7, wherein said color mapping data is encoded in SEI (Supplemental Enhancement Information) message. ### Claim 11 (depends on 7) The apparatus of claim 7, wherein said color mapping data represents a first piece-wise linear function applied to each color component, a three-by-three matrix applied to three color components, and a second piece-wise linear function applied to each color component. ### Claim 12 (depends on 7) The apparatus of claim 7, wherein said indicator is encoded in a transport stream. ### Claim 13 A non-transitory computer-readable medium including instructions for causing one or more processors to perform: encoding a video signal represented in a first color volume; encoding color mapping data; and encoding an indicator, wherein said indicator indicates whether (1) a color mapping based on said color mapping data is to be applied directly on said video signal represented in said first color volume or (2) said color mapping based on said color mapping data is to be applied on said video signal after a prior color mapping of said video signal from said first color volume into a second color volume different from said first color volume, and wherein said indicator further indicates said second color volume. ### Claim 14 (depends on 13) The medium of claim 13, wherein said indicator is a binary flag. ### Claim 15 (depends on 13) The medium of claim 13, wherein said encoding said video signal comprising, for a block of an image of said video signal: determining a prediction of said block; subtracting said prediction from said block to form a residual; and encoding said residual. ### Claim 16 (depends on 13) The medium of claim 13, wherein said color mapping data is encoded in SEI (Supplemental Enhancement Information) message. ### Claim 17 (depends on 13) The medium of claim 13, wherein said color mapping data represents a first piece-wise linear function applied to each color component, a three-by-three matrix applied to three color components, and a second piece-wise linear function applied to each color component. ### Claim 18 (depends on 13) The medium of claim 13, wherein said indicator is encoded in a transport stream.