-This paper evaluates suitable voice-data length in IP packets for the adjustment of VoIP network systems. Based on measurements in a real environment, we examined the voice-quality level while varying the voice-data length of IP packets under various network conditions. We found that a VoIP system with long-voice data has high-transmission efficiency but there is a high deterioration in the vo...

Acoustic and electroglottographic (EGG) measurements were used to examine voice quality parameters during the production of the rising and falling pitch movements in German. The vowels / / and / / were studied in a single-speaker speech corpus. The acoustic measurements comprised an automatic spectral analysis of the glottal parameters open quotient (OQ), glottal opening (GO), skewness of glott...

One of the most intriguing aspects of phonetic science is the number of distinguishable layers within the speech signal. Within even a single segment, such as a vowel, speakers control vowel quality, duration, F0, speech style, and so forth. Listeners, in turn, have learned to pay attention to these different acoustic layers in order to extract meaningful information from the speech signal. Pho...

Contrasting phonation types in languages can differ along several acoustic dimensions, depending on whether the contrast involves differences in open quotient, in glottal closing velocity, and in noise excitation/periodicity. Listeners thus potentially have multiple perceptual cues to such contrasts. Two perception experiments, classification and similarity rating, show that listeners from diff...

Different voice qualities tend to vary in terms of their intrinsic loudness. Perceptual experiments have shown that voice quality variation can be strongly associated with the affective colouring of an utterance. The question addressed in this paper concerns the role that the intrinsic loudness variation might play in this voice quality-to-affect mapping. To test the hypothesis that the intrins...

This paper presents a framework for managing voice quality in converged voice and data networks containing Internet Protocol based phones (IP phones). It introduces IP phones with voice quality monitoring and testing capabilities. These IP phones support network management capabilities without using conventional network management protocols (e.g., SNMP). Our framework provides basis for support...

Background: Chronic Obstructive Pulmonary Disease (COPD) refers to lung diseases such as, Chronic Bronchitis, Chronic Asthma and Emphysema. These diseases are characterized by obstruction to airflow that interferes with normal breathing and they frequently co-exist. COPD can affect voice as respiration is a vital subsystem for voice production COPD that have a significant voice impairment which...

This paper presents adaptive voice-quality control methods based on one-to-many eigenvoice conversion. To intuitively control the converted voice quality by manipulating a small number of control parameters, a multiple regression Gaussian mixture model (MR-GMM) has been proposed. The MR-GMM also allows us to estimate the optimum control parameters if target speech samples are available. However...