| 摘要 |
PROBLEM TO BE SOLVED: To provide techniques and tools for scalable video encoding and decoding. SOLUTION: For example, a 3D sub-band video encoder includes an embedded base layer codec in addition to temporal sub-band transforms and spatial sub-band transforms. The placement of the base layer codec among the sub-band transforms and the role of the base layer codec in scalable video encoding vary depending on implementation. In general, the base layer codec provides efficient compression at low bit rates and produces a base layer compressed video bit stream compatible with existing decoders. At the same time, the 3D sub-band video encoder provides spatial and temporal scalability options at higher bit rates, and refines the base layer video. A corresponding 3D sub-band video decoder includes an embedded base layer decoder. COPYRIGHT: (C)2006,JPO&NCIPI |
