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Predictive distortion reduction appts. for AM stereo transmitters - subtractively combines distortion cancelling components with stereo difference signal in multiplex modulation channel
Predictive distortion reduction appts. for AM stereo transmitters - subtractively combines distortion cancelling components with stereo difference signal in multiplex modulation channel
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机译:预测失真减少。用于AM立体声发射机-在多路调制通道中将失真消除分量与立体声差信号相减
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摘要
The apparatus for generating a composite AM stereo broadcast signal in which a carrier is angle modulated with stereo difference information contained in a first supplied signal. The angle-modulated carrier is then amplitude modulated with stereo sum information contained in a second supplied signal, in which distortion is predicted by the use of a simulated transmitter and receiver. A correction signal is generated having distortion representative components. Correction signals developed in this manner are used to modify the angle-modulating signal utilising a feedback technique, a subtractive technique, or both. This reduces distortion in the output of the stereo difference signal channel of actual AM stereo receivers which receive the composite AM stereo signal.
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