Dual mode coding

Details Dual mode coding Dual mode coding

H - Electricity

03

M

354/67

H03M 7/36 (2006.01) G06T 9/00 (2006.01) H04B 14/04 (2006.01) H04N 7/26 (2006.01) H04N 11/04 (2006.01)

Patent

CA 1203317

- 18 - DUAL MODE CODING Abstract A dual mode encoding/decoding technique for use in digital systems wherein transmitted digital words are limited, on average, to an allotted number of bits. The transmitted digital words are coded into first and second modes. The first coding mode utilizes predictive diferential 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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