摘要 |
Shortening the marking pulses (non-background) by an amount equal to the shortest pulse which the system is intended to pass improves the performance of the three level, band-width reducing system described in the application entitled "Facsimile Signal Modification Reducing the Information Channel Band-Width" filed on Dec. 21, 1967 and bearing Ser. No. 701,511 now U.S. Pat. No. 3,588,330.
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