HDTV system with receivers operable at different levels of resolution
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United States of America Patent
Stats
-
Sep 17, 1991
Grant Date -
N/A
app pub date -
Aug 27, 1990
filing date -
Aug 27, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A 787.5 line progressively scanned wideband video signal is sub-band coded for providing a plurality of (9.times.9) blocks of spectral coefficients, each representing a respective spatial portion of the video signal. Each block of coefficients is transmitted in truncated form and received by either a first receiver or a second receiver. The first receiver processes the received coefficients for deriving a (9.times.9) block of video pixels corresponding to each block of coefficients and produces a high resolution 787.5 line progressively scanned video image in response thereto. The second receiver processes the received coefficients for deriving a (6.times.6) block of video pixels corresponding to each block of coefficients and produces a lower resolution 525 line progressively scanned video image in response thereto.
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Cited Art Landscape
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