Victor G. Mycynek

TV Multichannel Sound--Reception and Decoding

High quality stereophonic sound from a television receiver requires improvements in thermal noise performance and in intercarrier buzz, over current practice. Buzz can be reduced by lowering transmitter incidental carrier phase modulation and by receiver Nyquist slope elimination. Buzz due to tuner-caused spurious phase modulation is eliminated through an intercarrier detection process. Nyquist slope elimination is combined with intercarrier detection in the Quasi-split, or quasi-parallel, sound type receiver.1,2 The improvement in noise performance is obtained through dbx companding which also contributes to the reduction of intercarrier buzz and distortion.