APPARATUS, A METHOD AND A COMPUTER PROGRAM FOR VIDEO CODING AND DECODING
There is provided methods, apparatuses and computer program products for video coding and decoding. A first part of a first coded video representation is decoded, and information on decoding a second coded video representation is received and parsed. The coded second representation differs from the first coded video representation in chroma format, sample bit depth, color gamut and/or spatial resolution, and the information indicates if the second coded video representation may be decoded using processed decoded pictures of the first coded video representation as reference pictures. If the information indicates that the second coded video representation may be decoded using processed decoded pictures of the first coded video representation as a prediction reference, decoded picture(s) of the first part is/are processed into processed decoded picture(s) by resampling and/or sample value scaling; and decoding a second part of a second video representation using said processed decoded picture(s) as reference pictures.
1 . A method comprising:
providing, in a media presentation description, metadata for at least a first set of pictures of a first coded video representation and a second set of pictures of a second coded video representation;
providing, in the media presentation description, one or more characteristics for decoding a sequence of non-overlapping consecutive segments or subsegments of the at least first coded video representation and the second coded video representation;
providing, in the media presentation description, an indication that the first coded video representation includes skip pictures usable as a reference for prediction in decoding the second set of pictures of the second coded video representation; and
encoding skip-coded intra random access pictures in the first coded video representation and containing information to be used as reference pictures for prediction in decoding the second coded video presentation,
wherein the second coded video representation differs from the first coded video representation in one or more of the following: chroma format, sample bit depth, color gamut, spatial resolution, or the one or more characteristics comprises a conformance point to which the sequence conforms.