Error resiliency within the enhancement layers of scalable video transmissions

A method (800) for improving a quality of a scalable video object plane enhancement layer transmission over an error-prone network. The enhancement layer transmission includes at least one re-synchronisation marker (310) followed by a Video Packet Header (750) and header extensions (740). A reference VOPs' identifier (e.g. 'ref_select_code' (715)) may be replicated from the video object plane header (710) into a number of enhancement layer header extensions (740). An error corrupting the reference VOPs' identifier is recovered (830, 840, 850, 860) by decoding a correct reference VOP's identifier from subsequent enhancement layer header extensions. Correct reference video object planes are identified (870, 880) to be used in a reconstruction of an enhancement layer video object plane in the scalable video transmission. This improves the error performance in an enhancement layer of video transmissions over wireless channels and the Internet where the errors can be severe.

Error resiliency within the enhancement layers of scalable video transmissions

A method for improving a quality of MPEG-4, or similar, scalable video enhancement layers transmitted over an error-prone network. The method includes the steps of inserting one or more re-synchronisation markers (660, 760, 860) into one or more enhancement layers of a scalable video sequence. When one or more errors (630, 730, 830) is detected in said one or more enhancement layers of said scalable video sequence, data is concealed (640, 740, 840) in the video sequence from a video bit position at which said one or more errors is detected, to a video bit position of a subsequent error free re-synchronisation marker. In this manner, a reduction in the amount of error-free data that has to be discarded can be achieved. This, in turn, reduces the amount of visual degradation in the video transmission. Dependant claims also detail how data partitioning and reverse variable length decoding may also be implemented within the enhancement layers.

Scalable video transmissions