An Apparatus, A Method and A Computer Program for Video Coding and Decoding

A method, comprising:

• selecting a first bitstream from a set of multiple bitstreams with different viewing orientations, the first bitstream comprising coded pictures of a video content;
• extracting a first spatial subset from the coded pictures of the first bitstream into a second bitstream, wherein the first spatial subset covers content for display;
• extracting a second spatial subset from the coded pictures of the first bitstream into a third bitstream, wherein the second spatial subset covers content for display with different viewing orientation than the first spatial subset;
• generating a fourth bitstream by selecting and removing a first set of pictures, comprising one or more pictures, from the third bitstream, wherein the selection is performed in a manner that the first set of pictures is not required for decoding pictures of the fourth bitstream;
• decoding the second bitstream for display;
• and
• decoding the fourth bitstream for display.

An apparatus comprising at least one processor, memory including computer program code, the memory and the computer program code configured to, with the at least one processor, cause the apparatus to perform at least the following:

• select a first bitstream from a set of multiple bitstreams with different viewing orientations, the first bitstream comprising coded pictures of a video content;
• extract a first spatial subset from coded pictures of a first bitstream into a second bitstream, wherein the first spatial subset covers content for display;
• extract a second spatial subset from the coded pictures of the first bitstream into a third bitstream, wherein the second spatial subset covers content for display with different viewing orientation than then first spatial subset;
• generate a fourth bitstream by selecting and removing a first set of pictures comprising one or more pictures from the third bitstream, wherein the selection is performed in a manner that the first set of pictures is not required for decoding any pictures of the fourth bitstream;
• decode the second bitstream for display;
• and
• decode the fourth bitstream for display.

A computer program product embodied on a non-transitory computer readable medium, comprising computer program code configured to, when executed on at least one processor, cause an apparatus or a system to:

• select a first bitstream from a set of multiple bitstreams with different viewing orientations, the first bitstream comprising coded pictures of a video content;
• extract a first spatial subset from coded pictures of a first bitstream into a second bitstream, wherein the first spatial subset covers content for display;
• extract a second spatial subset from the coded pictures of the first bitstream into a third bitstream, wherein the second spatial subset covers content for display with different viewing orientation than then first spatial subset;
• generate a fourth bitstream by selecting and removing a first set of pictures comprising one or more pictures from the third bitstream, wherein the selection is performed in a manner that the first set of pictures is not required for decoding any pictures of the fourth bitstream;
• decode the second bitstream for display;
• and
• decode the fourth bitstream for display.