06728317 is referenced by 412 patents.

A method and apparatus for image compression using temporal and resolution layering of compressed image frames. In particular, layered compression allows a form of modularized decomposition of an image that supports flexible application of a variety of image enhancement techniques. Further, the invention provides a number of enhancements to handle a variety of video quality and compression problems. Most of the enhancements are preferably embodied as a set of tools which can be applied to the tasks of enhancing images and compressing such images. The tools can be combined by a content developer in various ways, as desired, to optimize the visual quality and compression efficiency of a compressed data stream, particularly a layered compressed data stream. Such tools include improved image filtering techniques, motion vector representation and determination, de-interlacing and noise reduction enhancements, motion analysis, imaging device characterization and correction, an enhanced 3-2 pulldown system, frame rate methods for production, a modular bit rate technique, a multi-layer DCT structure, variable length coding optimization, an augmentation system for MPEG-2 and MPEG-4, and guide vectors for the spatial enhancement layer.

Moving image compression quality enhancement using displacement filters with negative lobes
Application Number
Publication Number
6728317 (B1)
Application Date
April 7, 2000
Publication Date
April 27, 2004
Gary A Demos
Culver City
Fish & Richardson P C
Dolby Laboratories Licensing Corporation
H04N 7/12
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