System for encoding and decoding layered compressed video data

Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal

Reexamination Certificate

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Reexamination Certificate

active

06553072

ABSTRACT:

FIELD OF THE INVENTION
This invention is related to the field of digital image signal processing, and more particularly to a system for processing hierarchical video data.
BACKGROUND OF THE INVENTION
An objective in the development of digital video encoding and decoding formats has been to provide a standard that accommodates different video transmission and reception systems. A further objective has been to promote interoperability and backward compatibility between different generations and types of video encoding and decoding equipment. In order to promote such interoperability and compatibility, it is desirable to define encoding and decoding strategies which can accommodate different types of video image scan (e.g. interlaced/progressive), frame rate, picture resolution, frame size, chrominance coding, and transmission bandwidth.
One strategy used to achieve interoperability involves separating video data into one or more levels of a data hierarchy (layers) organized as an ordered set of bitstreams for encoding and transmission. The bitstreams range from a base layer, i.e. a datastream representing the simplest (e.g. lowest resolution) video representation, through successive enhancement layers representing incremental video picture refinements. The video data is reconstructed from the ordered bitstreams by a decoder in a receiver. This strategy permits decoder complexity to be tailored to achieve the desired video picture quality. A decoder may range from the most sophisticated configuration that decodes the full complement of bitstreams, that is all the enhancement layers, to the simplest that decodes only the base layer.
A widely adopted standard that uses such a data hierarchy is the MPEG (Moving Pictures Expert Group) image encoding standard (ISO/IEC 13818-2, May 10th 1994), hereinafter referred to as the “MPEG standard”. The MPEG standard details how the base and enhancement layer data may be derived, and how the video data may be reconstructed from the layers by a decoder. It is herein recognized that it is desireable to provide a system that incorporates encoder and decoder architectures for rationally partitioning data between the various layers and for dynamically configuring such a system for this purpose.
SUMMARY OF THE INVENTION
In accordance with the principles of the present invention, dynamically configurable video signal processing systems enable data allocation among hierarchical layers to be varied. The dynamically configurable systems also permit the data to be partitioned between the hierarchical layers as desired, and allow variation in the number of layers employed.
A disclosed digital signal processing system according to the present invention adaptively processes a datastream of image representative input data. A data processor automatically partitions input data into one or more hierarchical layers as a function of one or more parameters selected from available system bandwidth, input data rate, and output signal quality.
Also disclosed is a digital signal processing system for adaptively decoding a datastream of image representative input data partitioned into one or more hierarchical layers. The decoding system derives synchronization and configuration information from the input data and is adaptively configured to decode the number of hierarchical layers of the input data in response to a locally generated Control signal.
In accordance with a feature of the invention, the image resolution and corresponding number of pixels per image is varied as a function of system parameters.


REFERENCES:
patent: 4656515 (1987-04-01), Christopher
patent: 4745474 (1988-05-01), Schiff
patent: 5144425 (1992-09-01), Joseph
patent: 5148272 (1992-09-01), Acampora et al.
patent: 5262854 (1993-11-01), Ng
patent: 5270813 (1993-12-01), Puri et al.
patent: 5387940 (1995-02-01), Kwok et al.
patent: 5414469 (1995-05-01), Gonzales et al.
patent: 5444491 (1995-08-01), Lim
patent: 5452006 (1995-09-01), Auld
patent: 5510840 (1996-04-01), Yonemitsu et al.
patent: 5635985 (1997-06-01), Boyce et al.
patent: 5742343 (1998-04-01), Haskell et al.
patent: 0 515 143 (1992-11-01), None
patent: 0 598 184 (1994-05-01), None
patent: 0 634 871 (1995-01-01), None
patent: 0 644 695 (1995-03-01), None
Adaptive Frame/Field Motion Compensated Video Codingby Atul Puri et al.—Signal Processing Image Communication, vol. 5, No. 1/02, Feb. 1, 1993, pp. 39-58.
Requirements for High Quality Video Coding Standardsby Atul Puri et al.—Signal Processing Image Communication, vol. 4, No. 2, Apr. 1, 1992, pp. 141-151.
Cosmic: A Compatible Scheme for Moving Image Codingby Atul Puri et al.—Signal Processing Image Communication, vol. 5, No. 1/02, Feb. 1, 1993, pp. 91-103.
MPEG2 Bildcodierung Fur Das Digitale Fernsehenby Lameilleure De J et al.—Fernseh und Kinotechnik, vol. 48, No. 3, Mar. 1, 1994, pp. 99/100, 102-104, 106/107 (with English Translation).
A Migration Path to a Better Digital Television Systemby Lim J. S.—SMPTE Journal, vol. 103, No. 1, Jan. 1, 1994, pp. 2-6.
Hierarchical Coding of Digital Televisionby Tihao Chiang et al.—I.E.E.E. Communications Magazine, vol. 32, No. 5, May 1, 1994, pp. 38-45.
MPEG Standard (ISO/IEC 13818-2, May 10th, 1994)—Containing Sections 3, 7.7 and 6.2.2.1 and 6.2.2.2.
MPEG Standard (ISO/IEC 13818-1, Jun. 10, 1994)—Containing Sections 2.6.6-2.6.7.
Elements of Information Theory, by T.M. Cover & J.A. Thomas, published by J.Wiley & Sons, 1991, Section 13.3.2.
Grand Alliance HDTV System Specification of Apr. 14, 1994, published by NAB, Chapter 3.
Manipulation and Compositing of MC-DCT Compressed Video, by S. Chang et al. published in IEEE Journal of Selected Area in Communications, Jan. 1995.
Hierarchical Coding of HDTVby F. Bosveld et al.—Signal Processing Image Communication, vol. 4, No. 3, Jun. 1, 1992, pp. 195-225.
Performance Evaluation of Hierarchical Coding Schemes for HDTVby F. Bosveld et al.—Signal Processing Theories and Applications, vol. 2, Sep. 18, 1990, pp. 801-804.
MPEG ++ A Robust Compression And Transport System for Digital HDTVby K. Joseph et al.—Signal Processing Image Communication, vol. 4, No. 4/05, Aug. 1, 1992, pp. 307-323.

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