Patent ID: 8872981

Claim:
A method of decoding a coded digital cinema bitstream ( 255 ), wherein the coded digital cinema bitstream ( 255 ) comprises a coded digital cinema image ( 105 A, 105 B) and mapping metadata ( 125 A, 125 B), the method comprising: decoding the coded digital cinema bitstream ( 105 A, 105 B) with a decoder to generate a first normalized digital cinema image ( 115 A, 115 ) with a first dynamic range and a first color gamut; and applying the mapping metadata to the first normalized digital image to generate a second normalized digital cinema image ( 130 A, 130 B) with a second dynamic range and a second color gamut, wherein the mapping metadata comprise an invertible mapping between the first and second normalized digital images, wherein the invertible mapping comprises a lossless invertible nonlinear transformation and an invertible matrix transformation, wherein generating in an encoder the first normalized digital image using the second normalized digital image and the invertible mapping comprises: applying the nonlinear transformation to the second normalized image to generate a first result and then applying the matrix transformation to the first result to generate the first normalized digital image, and generating in the decoder the second normalized digital image using the first normalized digital image and the invertible mapping comprises: applying the inverse matrix transformation to the first normalized image to generate a second result and then applying the inverse of the nonlinear transformation to the second result to generate the second normalized digital image.