Patent ID: 9060180
Filing Date: 2015-06-16
Classification: H04N

Abstract:
1. A method for coding of visual dynamic range (VDR) images, comprising: receiving a VDR signal; receiving a standard dynamic range (SDR) signal; encoding the SDR signal as a coded base layer signal using a first encoder, wherein the first encoder comprises an MPEG-2 encoder; encoding an enhancement layer signal using a second encoder, wherein the enhancement layer signal represents information with which the VDR signal may be reconstructed using the base layer signal and the enhancement layer signal; wherein the first encoder encodes the SDR signal with a plurality of discrete transform coefficients with fixed precision, wherein said transform coefficients with fixed precision represent fixed-point approximations of transform coefficients that have an arbitrary precision; encoding the base layer signal as a bitstream that complies with an Advanced Television Standards Committee (ATSC) specification; encoding the enhancement layer signal as a bitstream that complies with an ATSC enhanced vestigial sideband (E-VSB) specification; combining the ATSC encoded base layer bitstream and the ATSC E-VSB encoded enhancement bitstream into a combined ATSC/E-VSB signal stream; and transmitting the combined ATSC/E-VSB stream.