Stereo composite processor for stereo radio receiver

Details Stereo composite processor for stereo radio receiver Stereo composite processor for stereo radio receiver

1979-01-19

1980-04-15

Olms, Douglas W.

179 1GJ, H04H 500

Patent

active

041985435

ABSTRACT:
A radio receiver is effective to receive a radio frequency signal and derive therefrom a standard stereo composite signal comprising a sum of channels signal having components within a first band of frequencies in the audio range and a difference of channels signal having components within a second band of frequencies above the first band of frequencies. The radio receiver is provided with a low pass filter having a high frequency roll-off characteristic within the first frequency band and a substantially flat attenuated amplitude characteristic across the second frequency band. Linear mixer apparatus mixes filtered and unfiltered stereo composite signals in controlled relative proportion responsive to a control signal to produce a modified stereo composite signal for application to stereo decoder apparatus in order to simultaneously roll-off the high frequencies in each derived channel and to attenuate the difference of channels signal in degree controlled by the control signal. Control signal generating apparatus provides said control signal in response to a parameter indicative of noise in the stereo composite signal.

REFERENCES:
patent: 3061683 (1962-10-01), Freedman
patent: 3123673 (1964-03-01), Stumpers
patent: 3198885 (1965-08-01), Limberg
patent: 3258537 (1966-06-01), Proctor et al.
patent: 3673342 (1972-06-01), Muller
patent: 4032717 (1977-06-01), Mallon
patent: 4063039 (1977-12-01), Endres et al.
patent: 4087641 (1978-05-01), Sugai

Affiliated with

Also associated with

Rating

Stereo composite processor for stereo radio receiver does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Stereo composite processor for stereo radio receiver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stereo composite processor for stereo radio receiver will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-477046