Method and apparatus for outputting audio data and musical score image

A method for outputting a musical score corresponding to audio data, the method comprising:

• removing words from audio data and extracting a tone from the wordless audio data while the audio data is being reproduced;
• converting the tone into a frequency;
• identifying at least one of a monotone and polyphonic tone by analyzing the frequency extracted during a time period, after the time period elapses;
• calculating an average value of frequencies extracted during a time period and establishing the average value as a threshold value;
• identifying a frequency less than the threshold value as a monotone and converting the corresponding frequency into tone information data;
• identifying a frequency equal to or greater than the threshold value as a polyphonic tone and converting the corresponding frequency into tone information data, and storing the tone information data;
• displaying a musical score by extracting a musical sign corresponding to the tone information data.

A mobile terminal for outputting audio data and musical score image comprising:

• a controller comprising a control program for removing words from audio data and extracting a tone from the wordless audio data while the audio data is being reproduced, converting the tone into a frequency, identifying at least one of a monotone and polyphonic tone by analyzing the frequency extracted during a time period, after the time period elapses, calculating an average value of frequencies extracted during a time period and establishing the average value as a threshold value, identifying a frequency less than the threshold value as a monotone and converting the corresponding frequency into tone information data, identifying a frequency equal to or greater than the threshold value as a polyphonic tone and converting the corresponding frequency into tone information data, and extracting a musical sign corresponding to the tone information data;
• a memory unit for storing the tone information data;
• and
• a display unit for displaying a musical score.

A computer-readable recording medium storing a computer program code for outputting a musical score corresponding to audio data, comprising:

• a word remover for removing words from audio data;
• a tone extractor for extracting a tone from the wordless audio data;
• a tone converter for converting the tone into a frequency;
• a frequency detector for calculating an average value of frequencies extracted during a time period and establishing the average value as a threshold value, identifying a frequency less than the threshold value as a monotone and converting the corresponding frequency into tone information data and identifying a frequency equal to or greater than the threshold value as a polyphonic tone and converting the corresponding frequency into tone information data;
• and
• a display for displaying a musical score corresponding to the tone information data.