Video data scaling for video teleconferencing workstations commu

Details Video data scaling for video teleconferencing workstations commu Video data scaling for video teleconferencing workstations commu

1996-08-05

1998-11-03

Grant, Chris

Television

Two-way video and voice communication

User positioning

348 15, H04N 715

Patent

active

058316663

ABSTRACT:
A video scaling apparatus and technique for compressing and reconstructing video data sent between multimedia workstations during a video teleconference includes a video data scaling device which scale unscaled video data, having V horizontal lines of H pixels each, to reduce the quantity of horizontal lines and the quantity of pixels along each line. A pixel replication device replicate the received scaled pixels to increase the quantity of horizontal lines to V and the quantity of pixels along each of the horizontal lines to H. The scaling device reduces the quantity of horizontal lines to about V/2, and the quantity of pixels along each horizontal line to about H/2. A received pixel is replicated to replace an adjacent pixel along a line to reconstruct the line. The reconstructed line is replicated to replace an adjacent line. The replicated line is shifted by one pixel relative to the adjacent line from which it was replicated to reduce sharp edges and blockiness.

REFERENCES:
patent: Re33535 (1991-02-01), Cooper
patent: 2921124 (1960-01-01), Graham
patent: 3584142 (1971-06-01), Schoeffler
patent: 4068265 (1978-01-01), Russell
patent: 4153896 (1979-05-01), White
patent: 4218705 (1980-08-01), Inaba et al.
patent: 4387271 (1983-06-01), Artom
patent: 4516156 (1985-05-01), Fabris et al.
patent: 4525779 (1985-06-01), Davids et al.
patent: 4574374 (1986-03-01), Scordo
patent: 4587651 (1986-05-01), Nelson et al.
patent: 4641253 (1987-02-01), Mastram
patent: 4645872 (1987-02-01), Pressman et al.
patent: 4650929 (1987-03-01), Boerger et al.
patent: 4653090 (1987-03-01), Hayden
patent: 4679191 (1987-07-01), Nelson et al.
patent: 4686698 (1987-08-01), Tompkins et al.
patent: 4691233 (1987-09-01), Acampora
patent: 4710917 (1987-12-01), Tompkins et al.
patent: 4734765 (1988-03-01), Okada et al.
patent: 4748618 (1988-05-01), Brown et al.
patent: 4827339 (1989-05-01), Wada et al.
patent: 4847829 (1989-07-01), Tompkins et al.
patent: 4849811 (1989-07-01), Kleinerman
patent: 4855725 (1989-08-01), Fernandez
patent: 4882743 (1989-11-01), Mahmoud
patent: 4888795 (1989-12-01), Ando et al.
patent: 4893326 (1990-01-01), Duran et al.
patent: 4897866 (1990-01-01), Majmudar et al.
patent: 4905231 (1990-02-01), Leung et al.
patent: 4914527 (1990-04-01), Asai et al.
patent: 4918718 (1990-04-01), Emmons et al.
patent: 4924311 (1990-05-01), Ohki et al.
patent: 4932047 (1990-06-01), Emmons et al.
patent: 4935953 (1990-06-01), Appel et al.
patent: 4942540 (1990-07-01), Black et al.
patent: 4943994 (1990-07-01), Ohtsuka, et al.
patent: 4949169 (1990-08-01), Lumelsky et al.
patent: 4953159 (1990-08-01), Hayden et al.
patent: 4953196 (1990-08-01), Ishikawa et al.
patent: 4962521 (1990-10-01), Komatsu et al.
patent: 4963967 (1990-10-01), Orland et al.
patent: 4965819 (1990-10-01), Kannes
patent: 4972462 (1990-11-01), Shibata
patent: 4995071 (1991-02-01), Weber et al.
patent: 5003532 (1991-03-01), Ashida et al.
patent: 5034916 (1991-07-01), Ordish
patent: 5035624 (1991-07-01), Hoscye et al.
patent: 5042006 (1991-08-01), Flohrer
patent: 5042062 (1991-08-01), Lee et al.
patent: 5046079 (1991-09-01), Hashimoto
patent: 5046080 (1991-09-01), Lee et al.
patent: 5056136 (1991-10-01), Smith
patent: 5062136 (1991-10-01), Gattis et al.
patent: 5065345 (1991-11-01), Knowles et al.
patent: 5072442 (1991-12-01), Todd
patent: 5079627 (1992-01-01), Filo
patent: 5099510 (1992-03-01), Blinken, Jr. et al.
patent: 5103444 (1992-04-01), Leung et al.
patent: 5111409 (1992-05-01), Gasper et al.
patent: 5113431 (1992-05-01), Horn
patent: 5136628 (1992-08-01), Araki et al.
patent: 5138459 (1992-08-01), Roberts et al.
patent: 5170252 (1992-12-01), Gear et al.
patent: 5182635 (1993-01-01), Nakashima et al.
patent: 5192999 (1993-03-01), Graczyk et al.
patent: 5195086 (1993-03-01), Baumgartner et al.
patent: 5200989 (1993-04-01), Milone
patent: 5202761 (1993-04-01), Cooper
patent: 5208678 (1993-05-01), Nakagawa
patent: 5212742 (1993-05-01), Normile et al.
patent: 5218432 (1993-06-01), Wakeland
patent: 5231492 (1993-07-01), Dangi et al.
patent: 5253059 (1993-10-01), Ansari et al.
patent: 5267351 (1993-11-01), Reber et al.
patent: 5276678 (1994-01-01), Hendrichson et al.
patent: 5283561 (1994-02-01), Lumelsky et al.
patent: 5283638 (1994-02-01), Engberg et al.
patent: 5287182 (1994-02-01), Haskell et al.
patent: 5293358 (1994-03-01), Krause
patent: 5432525 (1995-07-01), Maruo et al.
patent: 5475421 (1995-12-01), Palmer et al.
patent: 5481297 (1996-01-01), Cash et al.
patent: 5594495 (1997-01-01), Palmer et al.
OSF/Motif, Programmer's Guide, Revision 1.1, Open Software Foundation, (Englewood Cliffs, NJ: Prentice Hall) (1990-1991).
Sabri, S., et al., "Video Conferencing Systems," Proceeding of the IEEE, vol. 73(4), pp. 671-688 (Apr. 1985).
Weiss, C., "Desk Top Video Conferencing--An Important Feature of Future Visual Communications," IEEE CH 2829, pp. 0134-0139 (1990).
Hopper, A., "Pandora--An Experimental System for Multimedia Applications," Operating Systems Review, vol. 24(2), pp. 19-34 (Apr. 1990).
Anderson, D.P., et al., "A Continuous Media I/O Server and Its Synchronization Mechanism," Computer, vol. 24(10), pp. 51-57 (Oct. 1991).
Palmer L. and Palmer R., "Desktop Meeting", LAN Magazine, 6(11):111-121 (Nov. 1991).
D.E. Comer, "Internetworking with TCP/IP, vol. I: Principles, Protocols, and Architecture", 2nd Edition, pp. 1-8, 337-346, 505 (Prentice Hall; Englewood Cliffs, New Jersey 1991).
ULTRIX Worksystem Software X Window System Protocol: X Version 11, Digital Equipment Corporation, Order No. AA-MA98A-TE (1988).
Minzer, et al., "New Directions in Signaling for Broadband ISDN," IEEE Communication Magazine, pp. 6-14 (Feb. 1989).
Liebhold, et al., "Digital Multimedia Systems," Communications of the ACM, vol. 34, No. 4, pp. 104-112.
Baxes, G.A., "Digital Image Processing," Prentice-Hall, Inc., pp. 160-162 (1984).
Ensor, et al., "The Rapport Multimedia Conferencing System--A Software Overview" (Mar. 10, 1988).
Maeno, et al., "Distributed Desktop Conferencing System (Mermaid) Based on Group Architecture" (Jun. 26, 1991).
Watabe, et al., "Distributed Desktop Conferencing System with Multiuser Multimedia Interface", (May 1991).
Ludwig, "Integration of CAD/CAE with Multimedia Teleconferencing and Messaging Via Broadband Networks and Shared Resource Servers," IEEE Systems Integration '90, pp. 136-143 (May 1990).
Schmandt, "Audio & Telephone Server for Multimedia Workstations," Proceedings IEEE Conference Comp. Workstations, pp. 150-159 (Mar., 1988).
Hoffert, et al., "Quick Time," COMPCON Spring 1992, Conf. Proceeding, pp. 15-20.
Zellweger, et al., "Overview Etherphone System," Proceedings IEEE Conference on Comp. Workstations, pp. 160-168 (Mar. 1988).

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