Television – Two-way video and voice communication – User positioning
Patent
1992-07-16
1995-12-12
Harvey, David E.
Television
Two-way video and voice communication
User positioning
348 18, 348424, 370 62, H04N 714
Patent
active
054754216
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 replicates 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: 2921124 (1960-01-01), Graham
patent: 3584142 (1971-06-01), Schoeffler
patent: 4068265 (1978-01-01), Russell
patent: 4153896 (1979-05-01), White
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: 4645872 (1987-02-01), Pressman et al.
patent: 4650929 (1987-03-01), Boerger et al.
patent: 4653090 (1987-03-01), Hayden
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: 4827339 (1989-05-01), Wada et al.
patent: 4847829 (1989-07-01), Tompkins et al.
patent: 4849811 (1989-07-01), Kleinerman
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: 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: 4953159 (1990-08-01), Hayden et al.
patent: 4953196 (1990-08-01), Ishikawa et al.
patent: 4962521 (1990-10-01), Komatsu et al.
patent: 4965819 (1990-10-01), Kannes
patent: 4995071 (1991-02-01), Weber et al.
patent: 5003532 (1991-03-01), Ashida et al.
patent: 5034916 (1991-07-01), Ordish
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: 5072442 (1991-12-01), Todd
patent: 5079627 (1992-01-01), Filo
patent: 5099510 (1992-03-01), Blinken, Jr. et al.
patent: 5136628 (1992-08-01), Araki et al.
patent: 5182635 (1993-01-01), Nakashima et al.
Liebhold et al., "Digital Multimedia Systems" Communications of the ACM Apr. 1991, vol. 34, No. 4 pp. 104-112.
Minzer et al., "New Directions in Signaling for Broadband ISDN", Feb. 1989--IEEE Communication Magazine pp. 6-14.
Baxes, Gregory A., "Digital Image Processing" Prentice-Hall, Inc. 1984 pp. 160-162.
Palmer and Palmer, "Desktop Meeting", LAN Magazine, 6(11):111-121 (Nov. 1991).
D. Comer, "Internetworking with TCP/IP, vol. I: Principles, Protocols, and Architecture", 2nd Edition, pp. 1-8, 337-346, 505 (Prentice Hall: Englewood Cliffs, N.J. 1991).
Palmer Larry G.
Palmer Ricky S.
Digital Equipment Corporation
Harvey David E.
LandOfFree
Video data scaling for video teleconferencing workstations commu does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Video data scaling for video teleconferencing workstations commu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Video data scaling for video teleconferencing workstations commu will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1363225