SYSTEM FOR IMPROVING SPEECH INTELLIGIBILITY THROUGH HIGH FREQUENCY COMPRESSION

摘要

A speech recognition enhancement system through high frequency compression is provided to improve intelligibility of speech signals and prevent generation of an artifact which distorts speech recognition. A speech enhancement system includes a frequency transformer(102) and a spectrum compressor(104). The frequency transformer transforms a speech signal from a time domain to a frequency domain. The spectrum compressor compresses a previously selected portion of a high frequency band and maps the compressed portion of the high frequency band within a low band restricted frequency range.