| 摘要 |
PURPOSE:To obtain a reference signal with high accuracy by providing selectably a memory in which specified reference signal data are stored between the decoder and D/A convertor of a PCM regenerator through a switching circuit. CONSTITUTION:Transmitted sound PCM signals are demodulated to digital signals of a row of PCM codes by a demodulator 2. The digital signal are descrambled by a decoder 3, deinterleaved, error corrected and interpolated, and data output DATA, bit clock BCK, and LR clock LRCK are outputted. In a data reproduction mode in which switches SW4-6 are connected to a contact (a) side, output of the decoder 3 is D/A converted 8, and separated to left and right channels by a demultiplexer 9 and outputted through LPF11, 12. When SW4-6 are connected to a contact (b), data from ROM14 in which specified data for reference signal are stored are read out successively, and D/A converter 8 together with frequency corresponding to BCK, LRCK from frequency dividers 18, 19, and outputted as a reference signal. |
