Loading patent…
AssigneeInternational Business Machines Corporation
InventorsCesar A. Gonzales, Dov Ramm, Eric Viscito
Estimating the term…
A system and method for processing a stream of video image data so as to create a video representation that multiplexes data corresponding to resolution or bitstream scales. This representation is such that the identity of the basic MacroBlock (MB) structure of the MPEG-1 ISO standard is preserved across all resolution and bitstream scales, e.g. by scaling across four levels of resolution. A MacroBlock is associated with a series of attributes which contribute to the amount of overhead data incorporated in an MPEG-1 compressed data stream, so that by preserving the MacroBlock identify across multiple resolutions and bitstream scales, these scales can share this overhead, thus requiring it to be included only once in the data stream. Preserving the MacroBlock identify also simplifies significantly the derivation of motion estimation vector data for all resolution scales other than the highest resolution. Essentially, the motion vector data corresponding to any resolution scales can be derived from the highest resolution motion vector by appropriately scaling it down. Alternatively, the full resolution motion vectors can be derived by appropriate scale up of lower resolution motion vectors. Further, the methodology for coding a MacroBlock is also preserved.
A method of decoding a moving image at a target spatial resolution scale from compressed video information containing data for a hierarchy of spatial resolution scales, comprising the steps of:
A method of producing a compressed video data representation of a moving image, the representation including a hierarchy of picture spatial resolution scales, comprising the steps of:
A method of producing a compressed video data representation of a moving image, the representation including a hierarchy of picture quality scales at the same spatial resolution, comprising the steps of:
A method of producing a compressed video data representation of a moving image, the representation including a hierarchy of spatial resolution scales, comprising the steps of:
A method of decoding a moving image at a target quality level scale from compressed video information containing data for a hierarchy of quality level scales, comprising the steps of:
Dependencies are inferred from the claim text.