Patent ID: 7379496
Filing Date: 2008-05-27
Classification: H04N

Abstract:
1. A method for decoding a bitstream for a sequence of video frames, the method comprising: receiving and processing first information for the sequence, wherein the first information indicates whether multiple spatial resolution coding is enabled for the sequence; determining the first information indicates that multiple spatial resolution coding is enabled for the sequence, and then for each of plural frames in the sequence, outputting a result of the processing; wherein the plural frames comprise at least one I-frame and at least one P-frame, wherein each of the at least one P-frame has a reference I-frame among the at least one I-frame, and wherein for each of the at least one P-frame the one or more spatial resolution scaling factors are constrained to be identical to the one or more spatial resolution scaling factors for the reference I-frame for that P-frame.