Patent ID: 7894521

Claim:
A method for coding video frames for the purpose of forming a scalable, compressed video sequence comprising video frames coded according to at least a first and a second frame format, the video frames of the first frame format being independent of other video frames, and the video frames of the second frame format being predicted from at least one other video frame, the method comprising encoding, at an encoder, the video sequence as at least part of a first sub-sequence, at least part of which has been formed by coding video frames of the at least first frame format; and encoding, at the encoder, the video sequence as at least a second sub-sequence, at least part of which has been formed by coding at least video frames of the second frame format, and at least one video frame of the second sub-sequence has been predicted from at least one video frame of the first sub-sequence; determining a dependency between at least the video frames of the second sub-sequence and at least one video frame of the first sub-sequence; and encoding said dependency into the video sequence.