| 摘要 |
A method for analog-to-digital broadcasting over SHV range includes transmission of a monophonic sum signal of left and right channels over a frequency band of 0,03-15 kHz, stereo-transmission pilot-tone of 19 Hz frequency, RDS signal at frequency of 57 kHz. At transmitting part, to transmit a difference signal shaped from left and right channels limited to 7 kHz, a balanced-modulated signal having low and upper sideband over a frequency band of 31-45 kHz is used. To transmit digital signal of an add-in program, frequency bands of 23-30 kHz and 46-53 kHz, which are symmetric as to a suppressed subcarrier frequency band, are used. |
