Systems for dither-quantizing and reconstruction of digital tele

Details Systems for dither-quantizing and reconstruction of digital tele Systems for dither-quantizing and reconstruction of digital tele

1994-10-26

1997-07-29

Britton, Howard W.

Television

Bandwidth reduction system

Data rate reduction

348574, 386 1, 386 46, H04N 726

Patent

active

056526245

ABSTRACT:
Recording of the stream of very coarse samples with which a preferred multiphase dither-quantizer sends compressed television permits multiple playback modes for reconstructing an archival TV picture with different tradeoffs between contrast resolution and blurring due to image motion. A real-time receiver can be arranged to change mode automatically pel-by-pel, thereby adapting locally to rates of change in the picture detail. For better resolution of contrast in combination with spatial resolution, both transmitter and receiver can be modified so that only a stipple component is averaged to recover decimated gray levels and a major fraction of the gray scale is refreshed every frame.

REFERENCES:
patent: 3739082 (1973-06-01), Lippel
patent: 4447803 (1984-05-01), Crosby
patent: 4460924 (1984-07-01), Lippel
patent: 4758893 (1988-07-01), Lippel
patent: 5148273 (1992-09-01), Lippel
patent: 5253045 (1993-10-01), Lippel

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