Transient Detection For Speech Coding Applications

Signal quality in speech codecs may be improved by selecting transients from speech signal and encoding them using a suitable method. This paper presents an algorithm for transient detection in speech signal. This algorithm operates in several frequency bands. Transient detection functions are calculated from energy measured in short frames of the signal. The final selection of transient frames is based on results of detection in all frequency bands. Performance of the algorithm is evaluated and some enhancements are proposed. The algorithm described here allows for accurate transient detection in speech and is suitable for use in practical speech coding applications.