Interactive video distribution systems – Video distribution system with upstream communication – Transmission network
Reexamination Certificate
2006-05-02
2006-05-02
Bui, Krista (Department: 2611)
Interactive video distribution systems
Video distribution system with upstream communication
Transmission network
C725S038000, C725S128000, C348S726000, C348S734000, C348S738000
Reexamination Certificate
active
07039941
ABSTRACT:
In a cable television converter terminal, NICAM signal passthrough is achieved using an alignment-free passthrough circuit including a NICAM SAW filter. The alignment-free passthrough circuit directly taps the output of the converter terminal's tuner to obtain the NICAM signal. As a result, the NICAM signal is not distorted by the components involved in obtaining the other signal components of the cable television signal. Consequently, sound quality is improved and rendered less vulnerable to degradation due to component aging, temperature fluctuations, and human error. The passthrough circuit can be implemented as a removable circuit module.
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Caporizzo Louis
Patel Dipakkumar R.
Bui Krista
General Instrument Corporation
Kananen Ronald P.
Nichols Steven L.
Rader Fishman and Grauer PLLC
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