Receiver-compatible enhanced definition television system
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United States of America Patent
Stats
-
Apr 23, 1991
Grant Date -
N/A
app pub date -
Feb 2, 1989
filing date -
Feb 2, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A television encoder for generating a receiver-compatible signal from a production video signal containing enhancement information which cannot be displayed on a standard receiver, the receiver-compatible signal being compatible with the standard receiver, the encoder including a filter bank for dividing the video signal into at least two groups of spatial frequency components including a first group and a second group, the first group containing members which when combined together form a standard video signal which is displayed by the standard receiver and the second group containing the enhancement information; a quantizer for quantizing at least one member of the first group; a combiner for adding at least one member of the second group to a quantized member of the first group to produce a modified first group; and a synthesizer for combining the members of the modified first group to generate the receiver-compatible signal.
First Claim
Family
International Classification(s)
Cited Art Landscape
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