Patent ID: 10728521

Abstract:
There are disclosed various methods, apparatuses and computer program products for video encoding and decoding. In some embodiments a first input picture sequence comprising pictures of an equirectangular projection format is obtained.The first input picture sequence is encoded at a first spatial size characterized by a first number of pixels into a first set of motion-constrained coded sub-picture sequences using a first sub-picture partitioning grid with a first sub-picture width in pixels. The first input picture sequence is also encoded at a second spatial size characterized by a second number of pixels into a second set of motion-constrained coded sub-picture sequences using a second sub-picture partitioning grid with the first sub-picture width in pixels, wherein the second number of pixels is an integer fraction of the first number of pixels. The pictures of the first input picture sequence are shifted horizontally in a wraparound manner; and the horizontally shifted first input picture sequence is encoded at the second spatial size into a third set of motion-constrained coded sub-picture sequences using the second sub-picture partitioning grid.