Pre-processing and speech codec encoding of ring-back audio signals transmitted over a communication network to a subscriber terminal
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United States of America Patent
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Jan 22, 2013
Grant Date -
Jul 12, 2012
app pub date -
Mar 21, 2012
filing date -
Jan 6, 2006
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Abstract
A method of pre-processing an audio signal transmitted to a user terminal via a communication network and an apparatus using the method are provided. The method of pre-processing the audio signal may prevent deterioration of a sound quality of the audio signal transmitted to the user terminal by pre-processing the audio signal, and by enabling a codec module, encoding the audio signal, to determine the audio signal as a speech signal. The method of pre-processing may include separating the audio signal into channels, measuring the channel energy for each of the channels, selecting a specific channel energy, and amplifying the specific channel energy. The method may include encoding an audio signal using a speech codec and/or decoding an encoded audio signal using the speech codec.
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