Title:
APPARATUS AND METHOD FOR ENCODING AND COMPUTING A DISCRETE COSINE TRANSFORM USING A BUTTERFLY PROCESSOR
Document Type and Number:
WIPO Patent Application WO2002093359
Kind Code:
A3
Abstract:
An apparatus to determine a transform of a block of encoded data the block of encoded data comprising a plurality of data elements. An input register is configured to receive a predetermined quantity of data elements. At least one butterfly processor is coupled to the input register and is configured to perform at least one mathematical operation on selected pairs of data elements to produce an output of processed data elements. At least one intermediate register is coupled to the butterfly processor and configured to temporarily store the processed data. A feedback loop is coupled to the intermediate register and the butterfly processor, and where if enabled, is configured to transfer a first portion of processed data elements to the appropriate butterfly processor to perform additional mathematical operations and where if disabled, is configured to transfer a second portion of processed data elements to at least one holding register.
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Inventors:
LAROCCA JUDITH
IRVINE CHRIS A
LEVIN JEFFREY A
IRVINE CHRIS A
LEVIN JEFFREY A
Application Number:
PCT/US2002/015916
Publication Date:
January 29, 2004
Filing Date:
May 15, 2002
Export Citation:
Assignee:
QUALCOMM INC (US)
International Classes:
G06F7/00; G06F17/14; G06T9/00; H03M7/30; H04N1/32; H04N1/41; H04N7/12; H04N7/30; H04N7/50; (IPC1-7): G06F17/14
Foreign References:
| EP0714212A2 | 1996-05-29 | |||
| EP0424119A2 | 1991-04-24 | |||
| US5610849A | 1997-03-11 | |||
| EP0566184A2 | 1993-10-20 | |||
| US5818742A | 1998-10-06 |
Other References:
VAISEY J ET AL: "IMAGE COMPRESSION WITH VARIABLE BLOCK SIZE SEGMENTATION", IEEE TRANSACTIONS ON SIGNAL PROCESSING, IEEE, INC. NEW YORK, US, vol. 40, no. 8, 1 August 1992 (1992-08-01), pages 2040 - 2060, XP000309977, ISSN: 1053-587X
CHEN R-J ET AL: "A FULLY ADAPTIVE DCT BASED COLOR IMAGE SEQUENCE CODER", SIGNAL PROCESSING. IMAGE COMMUNICATION, ELSEVIER SCIENCE PUBLISHERS, AMSTERDAM, NL, vol. 6, no. 4, 1 August 1994 (1994-08-01), pages 289 - 301, XP000458722, ISSN: 0923-5965
KATO Y ET AL: "AN ADAPTIVE ORTHOGONAL TRANSFORM CODING ALGORITHM FOR IMAGES UTILIZING CLASSIFICATION TECHNIQUE", ELECTRONICS & COMMUNICATIONS IN JAPAN, PART I - COMMUNICATIONS, SCRIPTA TECHNICA. NEW YORK, US, vol. 72, no. 5, PART 1, 1 May 1989 (1989-05-01), pages 1 - 9, XP000085028, ISSN: 8756-6621
CHEN R-J ET AL: "A FULLY ADAPTIVE DCT BASED COLOR IMAGE SEQUENCE CODER", SIGNAL PROCESSING. IMAGE COMMUNICATION, ELSEVIER SCIENCE PUBLISHERS, AMSTERDAM, NL, vol. 6, no. 4, 1 August 1994 (1994-08-01), pages 289 - 301, XP000458722, ISSN: 0923-5965
KATO Y ET AL: "AN ADAPTIVE ORTHOGONAL TRANSFORM CODING ALGORITHM FOR IMAGES UTILIZING CLASSIFICATION TECHNIQUE", ELECTRONICS & COMMUNICATIONS IN JAPAN, PART I - COMMUNICATIONS, SCRIPTA TECHNICA. NEW YORK, US, vol. 72, no. 5, PART 1, 1 May 1989 (1989-05-01), pages 1 - 9, XP000085028, ISSN: 8756-6621
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