Method and apparatus for video compression using skip modes

A video compression method comprising:

• receiving video data representing a video stream;
• for each of a plurality of regions in a state of the video stream, estimating motion between that region in that state and corresponding regions in other states of the video stream;
• selecting one or more parts of the state of the video stream as a part to be skipped in dependence on the respective estimated motion for an associated region of the state of the video stream;
• and
• encoding the video data to form a residual representing the state of the video stream in one or more channels by, in response to a part having been selected to be skipped, omitting data representing that part in at least one of the channels from the residual.

A video decompression device having one or more processors configured to execute video compression by:

• receiving encoded data for one or more first parts of a state of a video stream and skip data indicating an absence of encoded data for one or more second parts of the state of the video stream;
• decoding the received encoded data to reconstruct a representation of the state of the video stream in one or more channels for the one or more first parts of the state of the video stream,
• wherein the one or more first parts are associated with respective regions of the state of the video stream having the greatest motion relative to corresponding regions in other states of the video stream;
• and
• reconstructing a representation of the state of the video stream in one or more channels for the one or more second parts of the video stream.

A video decompression method comprising:

• receiving encoded data for one or more first parts of a state of a video stream and skip data indicating an absence of encoded data for one or more second parts of the state of the video stream;
• decoding the received encoded data to reconstruct a representation of the state of the video stream in one or more channels for the one or more first parts of the state of the video stream,
• wherein the one or more first parts are associated with respective regions of the state of the video stream having the greatest motion relative to corresponding regions in other states of the video stream;
• and
• reconstructing a representation of the state of the video stream in one or more channels for the one or more second parts of the video stream.