PENGEMBANGAN PENINGKATAN KUALITAS SUARA YANG TERCAMPUR DERAU

• Main Author: Johan Burnama, Daantje
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/1491
• Institution: Institut Teknologi Bandung

Speech enhancement involves processing speech signals for human listening or preparation for further processing prior to listening. In speech enhancement, the objective is to make the processed speech sound better than the unprocessed speech. Thus the main objective of speech enhancement is ultimately to improve one or more perceptual aspectd of speech, such as overall quality, intelligibility, or degree of listener fatigue. One of the speech enhancement application is the reduction of noise in speech to improve the performance of vocoders, and improvement of normal impaired hearing. <br /> The problem of enhancing speech degraded by additive noise has received considerable attention in the literature since the mid-1970s. As a result, a variety of approaches to speech enhancement have been investigated. One approach which has been considered in detail by Frazier is an adaptive comb filtering that is based on the observation that waveforms of voiced sounds are periodic with a period that corresponds to the fundamental frequency. <br /> In this thesis a test was performed for enhancement of speech degraded by additive noise. The test included the speech quality assessment for the subjective MOS test and objective quality measurement Results indicate that the adaptive comb filtering scheme does increase the signal to noise ratio (SNR) due to improving of the speech quality.