Methods and systems for displays with chromatic correction with differing chromatic ranges

• US 9,854,136 B2
• Filed: 12/14/2007
• Issued: 12/26/2017
• Est. Priority Date: 04/03/2007
• Status: Active Grant

• Current Assignee: InterDigital Madison Patent Holdings (InterDigital, Inc.)
• Original Assignee: Thomson Licensing Dtv
• Inventors: Doser, Ingo Tobias, Stauder, Jurgen, Lee, Bongsun
• Primary Examiner(s): TEITELBAUM, MICHAEL E
• Application Number:
  US12/450,637
• Publication Number:
  US 20100220237A1
• Time in Patent Office: 3,665 Days
• Field of Search: 348649
• CPC Class Codes: 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
• CPC Class Codes: H04N 1/6058 Reduction of colour to a range of reproducible colours, e.g. to ink- reproducible colour gamut

Abstract

There are provided a method and system for color correcting displays with different color gamuts. The method includes performing color correction on source picture content, using at least one of a non-reference type display having a non-reference color gamut and a reference type display having a reference color gamut. The performing step includes mastering the source picture content to provide mastered color corrected picture content for display on the reference type displays having a reference color gamut. The performing step further includes generating metadata for a subsequent inverse color gamut mapping that color transforms the mastered color corrected picture content for display on non-reference type displays having a non-reference color gamut. The subsequent inverse color gamut mapping is an inverse operation of a color gamut mapping applied during the color correction to obtain the mastered color corrected picture content for display on the reference type displays having the reference color gamut. The source picture content is mastered only for the reference type displays having the reference color gamut.

Claims

1. A method for color correcting, comprising:

performing color correction on source picture content, using at least one of a non-reference type display having a non-reference color gamut and a reference type display having a reference color gamut,

wherein said performing step comprises;

mastering the source picture content to provide mastered color corrected picture content for display on the reference type displays having a reference color gamut; and

generating metadata for a subsequent inverse color gamut mapping that color transforms the mastered color corrected picture content for display on non-reference type displays having a non-reference color gamut, wherein the metadata describes difference between colors of the non-reference type displays and the reference type displays; and

wherein the subsequent inverse color gamut mapping is an inverse operation of a color gamut mapping applied during the color correction to obtain the mastered color corrected picture content for display on the reference type displays having the reference color gamut, and the source picture content is mastered only for the reference type displays having the reference color gamut.

2. The method of claim 1, wherein said step of mastering the source picture content comprises rendering the mastered color corrected picture content on the reference type display using a color gamut mapping that converts the source picture content for the non-reference type display to picture content for the reference type display.

3. The method of claim 1, further comprising transmitting a specification of the inverse color gamut mapping to at least one of the non-reference type displays for consumer consumption.

4. The method of claim 1, wherein the metadata is provided to the non-reference type displays for final consumption at least one of in-band and out-of-band with respect to the mastered color corrected picture content.

5. The method of claim 1, wherein the reference type displays and the non-reference type displays are at least one of liquid crystal displays, plasma displays, cathode ray tube displays, digital light processing displays, organic light emitting diode displays, liquid crystal on silicon displays, and direct drive image light amplifier displays.

6. A system for color correcting, comprising:

a color correction module for performing color correction on source picture content, using at least one of a non-reference type display having a non-reference color gamut and a reference type display having a reference color gamut, to provide mastered color corrected picture content for display on the reference type displays having a reference color gamut; and

a color gamut mapping module for performing a color gamut mapping with respect to the mastered color corrected picture content for display on the reference type displays having the reference color gamut to generate metadata for a subsequent inverse color gamut mapping with respect to the color gamut mapping, the subsequent inverse color gamut mapping color transforming the mastered color corrected picture content for display on non-reference type displays having a non-reference color gamut, wherein the metadata describes difference between colors of the non-reference type displays and the reference type displays; and

wherein the source picture content is mastered only for the reference type displays having the reference color gamut.

7. The system of claim 6, wherein the metadata is provided to the non-reference type displays for final consumption at least one of in-band and out-of-band with respect to the mastered color corrected picture content.

8. The system of claim 6, wherein the reference type displays and the non-reference type displays are at least one of liquid crystal displays, plasma displays, cathode ray tube displays, digital light processing displays, organic light emitting diode displays, liquid crystal on silicon displays, and direct drive image light amplifier displays.

9. A system for color correcting, comprising:

means for performing color correction on source picture content, using at least one of a non-reference type display having a non-reference color gamut and a reference type display having a reference color gamut,

wherein said means for performing color correction comprises;

means for mastering the source picture content to provide mastered color corrected picture content for display on the reference type displays having a reference color gamut; and

means for generating metadata for a subsequent inverse color gamut mapping that color transforms the mastered color corrected picture content for display on non-reference type displays having a non-reference color gamut, wherein the metadata describes difference between colors of the non-reference type displays and the reference type displays;

wherein the subsequent inverse color gamut mapping is an inverse operation of a color gamut mapping applied during the color correction to obtain the mastered color corrected picture content for display on the reference type displays having the reference color gamut, and the source picture content is mastered only for the reference type displays having the reference color gamut.

10. The system of claim 9, wherein said means for mastering the source picture content comprises means for rendering the mastered color corrected picture content on the reference type display using a color gamut mapping that converts the source picture content for the non-reference type display to picture content for the reference type display.

11. The system of claim 9, further comprising means for transmitting a specification of the inverse color gamut mapping to at least one of the non-reference type displays for consumer consumption.

12. The system of claim 9, wherein the metadata is provided to the non-reference type displays for final consumption at least one of in-band and out-of-band with respect to the mastered color corrected picture content.

13. The system of claim 9, wherein the reference type displays and the non-reference type displays are at least one of liquid crystal displays, plasma displays, cathode ray tube displays, digital light processing displays, organic light emitting diode displays, liquid crystal on silicon displays, and direct drive image light amplifier displays.