Overlapped rate control for video splicing applications

摘要

Rate control techniques are provided for encoding an input video sequence into a compressed coded bitstream with multiple coding passes. The final coding pass may comprise final splices with non-overlapping frames that do not extend into neighboring final splices. A final splice in the final coding pass may correspond to at least one non-final splice in a non-final coding pass. A non-final splice may have overlapping frames that extend into neighboring final splices in the final coding pass. The overlapping frames in the non-final splice may be used to derive complexity information about the neighboring final splices. The complexity information about the neighboring final splices, as derived from the overlapping frames, may be used to allocate or improve rate control related budgets in encoding the final splice into the compressed coded bitstream in the final coding pass.

主权项

1. A method, comprising:
dividing an input video sequence into a plurality of final splices to be coded in a final coding pass; performing one or more non-final coding passes before the final coding pass, at least one of the one or more non-final coding passes comprising a non-final splice that corresponds to a final splice in the plurality of splices to be coded in the final coding pass, and the non-final splice comprising more frames than frames in the final splice; allocating one or more rate control related budgets for the final splice based on information derived from the non-final splice in the one or more non-final coding passes; and coding the final splice in the final coding pass using the one or more rate control related budgets.