Coding system for reducing redundancy
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United States of America Patent
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Oct 6, 1987
Grant Date -
N/A
app pub date -
Oct 27, 1986
filing date -
Oct 27, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to methods and apparatus for processing signals to remove redundant information thereby making the signals more suitable for transfer through a limited-bandwidth medium. The present invention specifically relates to methods and apparatus useful in video compression systems. Typically, the system determines differences between the current input signals and the previous input signals using mean-square difference signals. These mean-square signals are processed and compared with one or more thresholds for determining one of several modes of operation. After processing in some mode, the processed signals are in the form of digital numbers and these digital numbers are coded, using ordered redundancy coding, and transmitted to a receiver.
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