US 11,991,380 B2
Distribution of high dynamic range images in a mixed capability playback system
Robin Atkins, Vancouver (CA); Guan-Ming Su, Fremont, CA (US); and Gopi Lakshminarayanan, Fremont, CA (US)
Assigned to Dolby Laboratories Licensing Corporation, San Francisco, CA (US)
Appl. No. 18/009,846
Filed by Dolby Laboratories Licensing Corporation, San Francisco, CA (US)
PCT Filed Jun. 30, 2021, PCT No. PCT/US2021/040004
§ 371(c)(1), (2) Date Dec. 12, 2022,
PCT Pub. No. WO2022/006346, PCT Pub. Date Jan. 6, 2022.
Claims priority of provisional application 63/046,796, filed on Jul. 1, 2020.
Claims priority of application No. 20183398 (EP), filed on Jul. 1, 2020.
Prior Publication US 2023/0232028 A1, Jul. 20, 2023
Int. Cl. H04N 19/46 (2014.01); G06T 7/90 (2017.01); H04N 19/30 (2014.01)
CPC H04N 19/46 (2014.11) [G06T 7/90 (2017.01); H04N 19/30 (2014.11); G06T 2207/10024 (2013.01); G06T 2207/20208 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method for decoding High Dynamic Range (HDR) content at a playback device for displaying images based on the HDR content comprising:
receiving an HDR bitstream in which the HDR content is encoded, wherein the HDR bitstream comprises:
a coded base layer encoded from a specified color volume base layer to which an HDR image in the HDR bitstream is mapped;
a primary metadata packet, wherein information in the primary metadata packet is based on the HDR content, wherein the primary metadata packet comprises:
composer metadata, that, when applied to the specified color volume base layer by a composer, causes the composer to reconstruct the original HDR content; and
display mapping metadata corresponding to the reconstructed HDR content for dynamic display mapping, that, when applied to the reconstructed HDR content by a dynamic display mapping process, causes the dynamic display mapping process to map the reconstructed HDR content to the capabilities of the playback device;
an auxiliary metadata packet, wherein the auxiliary metadata packet comprises:
static composer and display mapping metadata corresponding to the specified color volume base layer for static display mapping, that, when applied to the specified color volume base layer by a static display mapping process, causes the static display mapping process to map the specified color volume base layer to the capabilities of the playback device;
an identifier that describes the processing capabilities of the playback device required for applying the static composer and display mapping metadata; and
a signal to bypass a compose operation when decoding the HDR bitstream; and
additional auxiliary metadata packets based on playback device capability to add increasing levels of functionality;
and
decoding the HDR bitstream, wherein decoding the HDR bitstream comprises:
upon determining that the playback device matches the required processing capabilities of the primary metadata packet and that the playback device supports one or more functionalities defined by the additional auxiliary metadata packets, using the additional auxiliary metadata packets in combination with the primary metadata packet; and
processing the coded base layer in the HDR bitstream based on the selected metadata to produce images for display on the playback device.