| 摘要 |
A system and method for improving clarity of an audio signal to be transmitted over a limited bandwidth communication channel selects predetermined frequencies of the audio signal for processing and adds even harmonic distortion to the selected frequencies such that the distortion is added within the limited bandwidth of the transmission channel. The system and method are particularly suited for telephony applications and may be utilized in hearing aids due to the effectiveness of clarifying voice signals. In addition, the system and method may be applied to other very low bandwidth signals, such as data compressed audio signals, computer voice files, computer audio files, and numerous other technologies which have an audio response less than normal human perception. The technique also applies to the use of perceptually coded audio.
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