Interface between a receiver and a sub-system

Details Interface between a receiver and a sub-system Interface between a receiver and a sub-system

H - Electricity

04

N

350/20, 350/3

H04N 7/083 (2006.01) H04N 7/00 (2006.01)

Patent

CA 1257681

ABSTRACT: An interface arrangement between a television receiver (13 and a conditional access sub-system (3), in particular for MAC type television signals comprises a bus having a first line (CKFH) conveying clock sig- nals at television line frequency, a second line (DATA) conveying data during prescribed periods in a four television frame period bus cycle and a third line (DIRN) conveying a signal indicating the direction of data travel on the second line. The bus may be connected to a number of sub-systems (3(1), 3(2)) internal to the television receiver or may be connected via a connector unit (7) to external sub-systems (5(1), 5(2)).

503548

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