Dual mode coding
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United States of America Patent
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-
Jan 1, 1985
Grant Date -
N/A
app pub date -
Sep 9, 1982
filing date -
Sep 9, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A dual mode encoding/decoding technique for use in digital systems wherein transmitted digital words are limited, on average, to an alotted number of bits. The transmitted digital words are coded into first and second modes. The first coding mode utilizes predictive differential coding to provide a precision which can be greater than that obtainable by coding information solely with the allotted number of bits, while the second mode assures at least a minimum precision for the allotted number of bits. The first coding mode is transmitted as long as a preselected precision is provided. If not, the second coding mode is transmitted. In the disclosed embodiment, the dual mode encoding/decoding technique is applied to the transmission of color video signals.
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