Changes between Version 24 and Version 25 of ARMS22-SOFTMODEM-HOWTO


Ignore:
Timestamp:
Mar 18, 2011 11:13:29 AM (9 years ago)
Author:
Ken Suzuki
Comment:

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  • ARMS22-SOFTMODEM-HOWTO

    v24 v25  
    153153[Session setActive: YES error: nil];
    154154}}}
     155
     156Next, for analysis of the voice, make instance of class AudioSignalAnalyzer and FSKRecognizer. AudioSignalAnalyzer parses the input waveform from the microphone to detect the falling and rising edge of the waveform. FSKRecognizer restores the data bits based on the results of the analysis of AudioSignalAnalyzer.
     157
     158{{{
     159#!C
     160recognizer = [[FSKRecognizer alloc] init];
     161analyzer = [[AudioSignalAnalyzer alloc] init];
     162[Analyzer addRecognizer: recognizer]; // set recognizer to analyzer
     163[analyzer record]; // start analyzing
     164}}}
     165
     166Then create an instance of a class FSKSerialGenerator for sound output. FSKSerialGenerator converts the data bits to audio signal and output.
     167
     168{{{
     169#!C
     170generator = [[FSKSerialGenerator alloc] init];
     171[Generator play]; // audio output starts
     172}}}