Data compander for digital video signals
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United States of America Patent
Stats
-
Jun 20, 1989
Grant Date -
N/A
app pub date -
Feb 24, 1988
filing date -
Mar 7, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A data compander for digital video signals wherein the sampling frequency is locked to the chrominance-subcarrier frequency. The data compander includes the following cascaded subcircuits: a lock-mode-changing filter which changes the lock of the video signals with the chrominance subcarrier into signals whose clock frequency is locked to the line frequency; an (a/b)-decimation filter, where a, b are integers, and a is less than b; a first peaking filter; a utilization circuit for the line-locked signals; a (b/a)-interpolation filter; a lock-mode-reversing filter which changes the lock of the signals with the line frequency; and a second peaking filter.
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