Subcarrier injection system and method using adaptive level-shif

Details Subcarrier injection system and method using adaptive level-shif Subcarrier injection system and method using adaptive level-shif

1996-03-13

1997-12-16

Kuntz, Curtis

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

381 3, H04H 500

Patent

active

056994338

ABSTRACT:
A system for transmitting a main channel signal, a first subcarrier signal, and a second subcarrier signal includes a control signal generator for producing a control signal in response to the amplitude of the main channel signal and the first subcarrier signal, a modulator coupled to the control signal generator and generating the second subcarrier signal, a voltage controlled amplifier for providing the second subcarrier signal at an injection level that varies with the control signal, and a transmitter for transmitting the second subcarrier signal at the varying injection level.

REFERENCES:
patent: 4633495 (1986-12-01), Schotz
patent: 4698842 (1987-10-01), Mackie et al.
patent: 5349386 (1994-09-01), Borchardt et al.
Osamu Yamada, et al., NHK's High Capacity FM Subcarrier System, NAB 1993 Broadcast Engineering Conference Proceedings, pp. 415-423.

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