Receiving digital sound/data information

Details Receiving digital sound/data information Receiving digital sound/data information

H - Electricity

04

N

344/25

H04N 7/08 (2006.01) H04N 7/083 (2006.01) H04N 11/08 (2006.01)

Patent

CA 1253601

PHB. 33.145 17 ABSTRACT: A receiver for recovering sound/data information for a number of services transmitted digitally as a packet multiplex has the data, after demodulation, applied to a first unit (3) where it is resynchronized for application to a sync. and data extraction unit (19). In the extrac- tion unit (19) the data packets are processed and applied, at a different clock rate, to a packet bus (35) to which a desired number of packet digital sound recovery devices (26) and packet encryption recovery devices (27) are con- nected. Instead of each recovery device (26, 27) interro- gating all the packets of data those packets carrying a service identification address are processed in the extraction unit (19) and service addresses for user selected services are applied from a microcomputer (23) over an I2C bus to the recovery devices (26, 27), control information also being received and interpreted by said extraction unit (19) and applied in similar manner to the recovery devices (26, 27).

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