Television – Two-way video and voice communication – User positioning
Patent
1996-12-10
1999-09-07
Faile, Andrew I.
Television
Two-way video and voice communication
User positioning
348731, 4551801, 4551901, 455296, 455260, 455209, 375346, H04N 710
Patent
active
059494727
ABSTRACT:
A method of tuning channels for television and community antenna television (CATV) devices includes the step of receiving a radio frequency input (RFI) signal having at least one carrier signal at frequency f.sub.s associated with a selected broadcast channel. The RFI signal is up-converted by m to a first intermediate frequency wherein the carrier signal is located at f.sub.s +m. The first intermediate frequency is filtered. The filtered first intermediate frequency is down-converted by n to a second intermediate frequency wherein the second intermediate frequency includes the carrier signal at f.sub.s +m-n. Additional methods for improving the reception of the selected channel include the step of varying m and n in order to avoid frequency-dependent anomalies within the pass band of the filter. For digital communications, m and n are varied in accordance with an error rate of the digital communications in order to reduce the error rate of the digital communications.
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Adams, III Lewis E.
Dang Nam V.
Brown Reuben M.
Faile Andrew I.
Intel Corporation
LandOfFree
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