Abstract: Inter-frame encoding/decoding equipment for television signals includes inter-frame encoding equipment generating an encoded signal by encoding a difference between television signals and the output of a frame memory and inter-frame decoding equipment which receives the encoded signal sent from the inter-frame encoding device via a transmission line. The decoding equipment decodes by adding its output of the frame memory to the encoded signal. The inter-frame encoding equipment is provided with a first operation circuit which calculates remainders obtained by dividing a predetermined value, into bit groups of the output or the input of the frame memory. The inter-frame decoding equipment is provided with a second operation circuit which calculates remainders obtained by dividing, the predetermined value, into the bit groups of the output or the input of its frame memory.
Type:
Grant
Filed:
June 14, 1984
Date of Patent:
June 30, 1987
Assignees:
Nippon Telegraph & Telephone Public Corp., Fujitsu Limited, NEC Corp.
Abstract: Multilevel baseband signals are applied to a full-wave rectifying section which produces first and second outputs. These outputs are applied to an analog-to-digital converting means which produces a plurality of recovered binary digital signals and an error signal. A controller is supplied with at least one recovered binary digital signal and the error signal, and produces two control signals which are fed to the full-wave rectifying section to compensate (a) first DC-drifts superimposed on the multilevel baseband signal and (b) second DC-drifts generated within the full-wave rectifying section itself.