METHOD OF RECEIVING FOR DIGITAL SIGNAL PROCESSOR

摘要

The method detects continuity check tone (CCT) signal using a digital signal processor and CCT signal detection program. The method comprises the steps of: (A) initializing data of CCT detection program; (B) checking pulse coded modulation data input and discriminating that the number of PCM data is 133; (C) converting PCM data into linear data using a look-up table and calculating power spectrum when the number of PCM data is not 133; (D) calculating power of each frequency band and calculating the sum of power when the number of PCM data is 133; (E) detecting a frequency signal satifying receiving standard; (F) converting the frequency into signal code data; (F) checking that the frequency is detected twice and storing the signal code data on a memory.