| 摘要 |
<p>A circuit for FM-modulating the sum signal of a left signal and a right signal forming a stereophonic voice with the voice carrier of a main channel, receiving a television voice multiplex signal FM-modulated by the voice carrier of a sub channel for the right signal and reproducing the left signal and the right signal. This circuit further rectifies and reproduces by a rectifier (29) an inter-carrier signal with the beat of the voice intermediate frequency signal and the video carrier signal of the sub channel for the right signal, rectifies and reproduces by a rectifier (34) the voice intermediate frequency signal of the main channel for the sum signal, and produces by circuits (39), (40) the left signal from the reproduced right signal and the sum signal. Since the sum signal is not reproduced by rectifying the inter-carrier signal but is reproduced directly by rectifying the voice intermediate frequency signal of the channel, no buzz components are presented. Thus, the buzz components presented in the left signal led from a matrix circuit can be reduced to the same magnitude as that of the buzz components in the right signal.</p> |
