11-04-2019 дата публикации
Номер: US20190110059A1
There is provided a decoding device including circuitry configured to receive coded data and conversion information, the coded data pertaining to an image having luminance in a first dynamic range and the conversion information pertaining to a conversion of dynamic range of the luminance of the image from the first dynamic range into a second dynamic range; and decode the received coded data so as to generate the image, wherein the conversion uses a knee function. 1. A decoding device comprising: receive coded data and conversion information, the coded data pertaining to an image having luminance in a first dynamic range and the conversion information pertaining to a conversion of dynamic range of the luminance of the image from the first dynamic range into a second dynamic range; and', 'decode the received coded data so as to generate the image,, 'circuitry configured to'}wherein the conversion uses a knee function that, is defined by at least one knee point, and unconverted luminance range information indicating a permillage of peak luminance level for the image prior to the conversion, relative to a normalized luminance level,', 'unconverted display luminance information indicating an expected display brightness of peak luminance level for the image prior to the conversion,', 'converted luminance range information indicating a permillage of peak luminance level for the image after the conversion relative to the normalized luminance level, and', 'converted display luminance information indicating an expected display brightness of peak luminance level for the image after the conversion,, 'wherein the conversion information includes'}2. The decoding device according to claim 1 , wherein the conversion uses the knee function to map the dynamic range of the luminance of the image from the first dynamic range into the second dynamic range.3. The decoding device according to claim 2 , wherein the conversion information includes pre-conversion information and post- ...
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