Discrete parallel path modulation multiplexer

Details Discrete parallel path modulation multiplexer Discrete parallel path modulation multiplexer

1991-04-12

1992-10-13

Ng, Jin F.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

381 2, 381 14, H04H 500

Patent

active

051557690

ABSTRACT:
A discrete parallel path modulation multiplexer for use in generating a composite baseband signal from separate left and right input signals. The composite baseband signal includes the sum of the left and right input signals and the product of the difference between the left and right input signals and a subcarrier. The composite baseband signal may also include a pilot subcarrier at one-half the frequency of the subcarrier. In one signal path, the multiplexer multiplies the right input signal by the function (1+sin (wt)) and in a second signal path the multiplexer multiplies the left input signal by the function (1-sin (wt)). The products are then combined to obtain the composite baseband signal. A pilot subcarrier may also be generated and included as part of the composite baseband signal.

REFERENCES:
patent: 3257511 (1966-06-01), Adler et al.
patent: 4516257 (1985-05-01), Torick
patent: 4704727 (1987-11-01), Beard

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