US 12,262,023 B2
Apparatuses and methods for improved encoding of images for better handling by displays
Chris Damkat, Eindhoven (NL); Gerard De Haan, Helmond (NL); Mark Jozef Willem Mertens, Eindhoven (NL); Remco Muijs, Meteren (NL); Martin Hammer, Arendonk (BE); and Philip Steven Newton, Waalre (NL)
Assigned to Koninklijke Philips N.V., Eindhoven (NL)
Filed by KONINKLIJKE PHILIPS N.V., Eindhoven (NL)
Filed on Jan. 23, 2024, as Appl. No. 18/419,988.
Application 18/419,988 is a continuation of application No. 17/567,915, filed on Jan. 4, 2022, granted, now 12,058,334.
Application 17/567,915 is a continuation of application No. 17/074,726, filed on Oct. 20, 2020, granted, now 11,252,414.
Application 17/074,726 is a continuation of application No. 16/261,150, filed on Jan. 29, 2019, granted, now 10,855,987.
Application 16/261,150 is a continuation of application No. 13/821,403, granted, now 10,306,233, previously published as PCT/IB2011/053950, filed on Sep. 9, 2011.
Claims priority of application No. 10177155 (EP), filed on Sep. 16, 2010.
Prior Publication US 2024/0163446 A1, May 16, 2024
Int. Cl. H04N 19/136 (2014.01); G09G 3/34 (2006.01); H04N 19/154 (2014.01); H04N 19/46 (2014.01); H04N 19/85 (2014.01)
CPC H04N 19/136 (2014.11) [G09G 3/3426 (2013.01); H04N 19/154 (2014.11); H04N 19/46 (2014.11); H04N 19/85 (2014.11); G09G 2320/062 (2013.01); G09G 2360/16 (2013.01); G09G 2370/04 (2013.01)] 28 Claims
OG exemplary drawing
 
1. A method comprising:
encoding a video,
wherein the video comprises a first image and a second image,
wherein the first image is arranged for display at a first time,
wherein the second image is arranged to display at a second time,
wherein the first image comprises a first array of pixel colors,
wherein the first array of pixel colors encode first luminances,
wherein the first luminances lie within a first luminance range,
wherein the second image comprises a second array of pixel colors,
wherein the second array of pixel colors encode second luminances,
wherein the second luminances lie within the first luminance range,
wherein the first image has a first characteristic luminance,
wherein the first characteristic luminance summarizes at least a portion of the first luminances by applying an equation to the portion of the first luminances,
wherein the second image has a second characteristic luminance,
wherein the second characteristic luminance summarizes at least a portion of the second luminances by applying the equation to the portion of the second luminances,
wherein the first characteristic luminance is different from the second characteristic luminance;
coding the first array of pixel colors;
coding the second array of pixel colors; and
coding descriptive data,
wherein the descriptive data comprises a first luminance mapping function,
wherein the first luminance mapping function is arranged to map the first luminances to third luminances,
wherein a third array of pixel colors encode the third luminances,
wherein a third image comprises the third array of pixel colors,
wherein the third image corresponds to the first image,
wherein the third image is arranged to display at the first time,
wherein the third luminances lie within a third luminance range,
wherein the third luminance range is different from the first luminance range,
wherein the descriptive data comprises a second luminance mapping function,
wherein the second luminance mapping function is arranged to map the second luminances to fourth luminances,
wherein a fourth array of pixel colors encode the fourth luminances,
wherein a fourth image comprises the fourth array of pixel colors,
wherein the fourth image corresponds to the second image,
wherein the fourth image is arranged for display at the second time,
wherein the fourth luminances lie within the third luminance range,
wherein the first luminance mapping function has at least one different mathematical property than the second luminance mapping function.