Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Patent
1987-05-13
1990-01-09
Shoop, Jr., William M.
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
375 27, 358135, H03M 304
Patent
active
048931233
ABSTRACT:
A transmission system for use in digital television has an input for receiving a signal to be encoded, a difference circuit (12) for supplying a differential signal formed by a given number of binary elements representing the difference between the signal to be encoded and a prediction signal, a transmission prediction circuit for supplying the prediction signal, a transmission transcoding circuit (15) for reducing the number of binary elements of the differential signal as a function of a control information, an activity measuring circuit (30) for supplying an activity information, a statistic encoding circuit (22) for variable word length coding of the output signal of the transcoding circuit, a buffer memory circuit (25) for storing the words of the statistic encoding circuit and for supplying them to the output of the system, and an occupation measuring circuit (45) for supplying an occupation information of the buffer memory circuit. This system furthermore includes a combination circuit (50) for supplying the control information in response to the activity information and the occupation information applied thereto.
REFERENCES:
patent: 4369464 (1983-01-01), Temime
patent: 4661849 (1987-04-01), Hinman
Goodman Edward W.
Shoop Jr. William M.
U.S. Philips Corporation
Young Brian K.
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