Title :
Relevancy of time-frequency features for phonetic classification measured by mutual information
Author :
Yang, Hongming ; Van Vuuren, Sarel ; Hermansky, Hynek
Author_Institution :
Dept. of Comput. Sci. & Eng., Oregon Graduate Inst. of Sci. & Technol., Beaverton, OR, USA
Abstract :
In this paper we use mutual information to study the distribution in time and frequency of information relevant for phonetic classification. A large database of hand-labeled fluent speech is used to (a) compute the mutual information between phoneme labels and a point of logarithmic energy in the time-frequency plane and (b) compute the joint mutual information between phoneme labels and two points of logarithmic energy in the time-frequency plane
Keywords :
feature extraction; information theory; signal classification; speech processing; speech recognition; statistical analysis; time-frequency analysis; automatic speech recognition; frequency distribution; hand-labeled fluent speech database; logarithmic energy; mutual information; phoneme labels; phonetic classification; speech signal analysis; time distribution; time-frequency features; time-frequency plane; Automatic speech recognition; Computer science; Databases; Electric variables measurement; Frequency measurement; Mutual information; Signal analysis; Speech analysis; Time frequency analysis; Time measurement;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1999. Proceedings., 1999 IEEE International Conference on
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-5041-3
DOI :
10.1109/ICASSP.1999.758103
