Image compression systems with optimized data access

Patent 5606428 Issued on February 25, 1997. Estimated Expiration Date:

June 16, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Dual block still video compander processor
Patent #: 4772956
Issued on: 09/20/1988
Inventor: Roche , et al.

Interpolator for compressed video data
Patent #: 4783698
Issued on: 11/08/1988
Inventor: Harney

Video stream processing frame buffer controller
Patent #: 4800431
Issued on: 01/24/1989
Inventor: Deering

High definition TV system
Patent #: 4916525
Issued on: 04/10/1990
Inventor: Drummond

Image information processing apparatus
Patent #: 4942479
Issued on: 07/17/1990
Inventor: Kanno

Dual processor image compressor/expander
Patent #: 4999715
Issued on: 03/12/1991
Inventor: Porcellio, et al.

Structure of image processing system
Patent #: 5029018
Issued on: 07/02/1991
Inventor: Noso, et al.

Image data processing unit
Patent #: 5029019
Issued on: 07/02/1991
Inventor: Yoshihara, et al.

Parallel processors sequentially encoding/decoding compaction maintaining format compatibility Patent #: 5109226
Issued on: 04/28/1992
Inventor: MacLean, Jr., et al.

Inventor

Hanselman, Eric G.

Application

No. 260646 filed on 06/16/1994

US Classes:

358/404, Facsimile memory monitoring345/535, Memory arbitration345/554, Multi-port memory345/555, For storing compressed data358/444Memory interface

Examiners

Primary: Coles, Sr., Edward L.
Assistant: Stoll, Thomas L.

Attorney, Agent or Firm

Skjerven, Morrill, MacPherson Franklin & Friel, Shenker; Michael, Hoffman; E. Eric

International Class

H04N 001/00

Abstract

An image compression system has an image memory accessible from the image bus. Compressed data are stored in a dual-ported memory accessible from both the image bus and the host bus. The compressor/expander accesses the image memory while the host accesses the dual-ported memory. Dual-ported memory allocation schemes and a computer program controlling the image compression system are also provided.

Other References

High Speed CMOSData Book, Integrated Device Technology, Inc., 1988, pp. 14-139 to 14-144
Laurent Meilleur, Dual-Port Memory Architecture Enhances Performance of VMEbus, Computer Technology Review, Summer 1988, pp. 28 to 31
Peter M. Fuchs, Compressing data conserves memory in bit-mapped displays, EDN Oct. 30, 1986, vol. 31, No. 22
Govind Kamath, PC Facsimile Transfer Steps Up, Electronic Design, Mar. 9, 1989, pp. 59 to 66
μPD72185 Advanced Compression/Expansion Engine User's Manual, (rev. B), NEC Corporation, Dec. 6, 1989, IEM-5067B
Microcomputer Products Data Book. Microprocessors, Peripherals, and DSP Products, 1987, vol. 2, NEC Electronics Inc., Aug. 1986, NECEL-000658, pp. 3-193 to 3-227
μPD72185 Advanced Compression/Expansion Engine, NEC Electronics Inc., Jan. 1989, pp. 1 to 24
Memory Products Data Book, NEC Electronics Inc., 1989, NECEL-000154, pp. 5-53 to 5-66
Personal Computer Products, Am7971A, Advanced Micro Devices, 1989, pp. 5-3 to 5-56
David Silver & James Williamson, Data-compression chip eases document-processing design, System Design/Integrated Circuits, Nov. 1987
AM95C71, Video Compression/Expansion Processor (VCEP), Advanced Micro Devices, Sep. 1988, pp. 2 to 28
Am7971, Compression Expansion Processor (CEP with image bit-boundary processing), Advanced Micro Devices, Jan. 1987, pp. 1 to 56
Am7971A/Am95C71, VCEP, Advanced Micro Devices, Sep. 1988, pp. 1 to 1