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US 4,047,227 AGranted
Auxiliary signal processing circuit
AssigneeMatsushita Electric Corporation of America
InventorTheodore S. Rzeszewski
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AssigneeMatsushita Electric Corporation of America
InventorTheodore S. Rzeszewski
Estimating the term…
A television receiver includes a provision for processing auxiliary signals in addition to the conventional information signals. The auxiliary signals comprise various combinations of N signals out of a total of M possible signals, where N and M are positive integers greater than 1, and N is less than M. The auxiliary signals preferably are audio signals outside the normal audible range, and the decoding of unique combinations of these signals at a receiver is used to provide channel number identification when the signals are transmitted from transmitting stations. In addition, the auxiliary signals transmitted from a transmitting station are used to control signal-seek tuning, direct channel access, or channel display. Also, unique combinations of N out of M possible signals are used in a remote control system to provide output signals indicative of different functions to be performed by the television receiver.
A wave signal receiver for receiving and processing conventional information signals and auxiliary signals, said auxiliary signals always comprising various combinations of exactly N signals out of a total of M possible signals, where N and M each are positive integers greater than 1 and N is less than M, said receiver including in combination:
A wave signal receiver including means for receiving auxiliary signals always comprising various combinations of exactly N signals out of a total of M possible signals, where N and M each are positive integers greater than one and N is less than M, said receiver including in combination:
A remote control system for a television receiver for identifying and processing remote control signals for performing different functions at the receivers, wherein said remote control signals are supplied to said receiver in the form of auxiliary signals always comprising various combinations of exactly N signals out of a total of M possible signals, where N and M each are positive integers greater than 1 and N is less than M, said system including in combination:
Dependencies are inferred from the claim text.