Generalized scalability for video coder based on video objects

摘要

A video coding system that codes video objects as scalable video object layers. Data of each video object may be segregated in to one or more layers. A base layer contains sufficient information to decode a basic representation of the video object. Enhancement layers contain supplementary data regarding the video object that, if decoded, enhance the basic representation obtained from the base layer. The present invention thus provides a coding scheme suitable for use with decoders of varying processing power. A simple decoder may decode only the base layer of the video objects to obtain the basic representation. However, more powerful decoders may decode the base layer data of video objects and additional enhancement layer data to obtain improved decoded output. The coding scheme supports enhancement of both the spatial resolution and the temporal resolution of video object.

主权项

1. A video decoding system in which video objects are recognized from video data, wherein instances of a video object are coded as video object planes (VOPs), the video decoding system comprising:
a base layer decoder having an input for VOP data associated with a first video object layer of the video object; a processor coupled to an output of the base layer decoder; and an enhancement layer decoder, having a first input for VOP data associated with a second video object layer of the video object and a second input coupled to the processor and responsive to a ref_select_code for decoding predictive coded VOP (P-VOP) data of the VOP data, the enhancement layer decoder decoding the P-VOP data with reference to one of:
data of a VOP most recently decoded by the enhancement layer decoder; anddata of a most recent VOP in a display order decoded by the base layer decoder.