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

1995-05-22

1997-01-14

Harvey, David E.

Television

Two-way video and voice communication

User positioning

348 15, H04N 715

Patent

active

055944957

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.

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