Title :
Single channel speech enhancement in real time
Author :
Magotra, N. ; Livingston, F. ; Rajagopalan, S.
Author_Institution :
Dept. of Electr. & Comput. Eng., New Mexico Univ., Albuquerque, NM, USA
Abstract :
The paper presents research results involving the development of a digital binaural hearing aid using Texas Instrument´s TMS320C3X digital signal processing (DSP) chip. The device is referred to as the Customized Universal Digital Listening System (CUDLS). Currently most commercially available hearing aids are analog devices which typically amplify speech in the frequency range 100 Hz to 4400 Hz with limited ability to shape the spectrum of the input signal. Some sophisticated `programmable´ aids have reached the market but none of these are truly digital. CUDLS implements a digital binaural equalizer that can shape the spectrum of the input signal to any desired shape in the frequency band d.c. to 9000 Hz. It also incorporates speech enhancement as an integral part of the hearing aid. The results presented in the paper deal primarily with this last aspect of the device
Keywords :
adaptive filters; application specific integrated circuits; digital filters; digital signal processing chips; equalisers; filtering and prediction theory; hearing aids; real-time systems; spectral analysis; speech analysis and processing; Customized Universal Digital Listening System; Texas Instrument´s TMS320C3X digital signal processing chip; digital binaural equalizer; digital binaural hearing aid; input signal; programmable aids; real time; single channel speech enhancement; Adaptive filters; Auditory system; Band pass filters; Digital signal processing chips; Ear; Equalizers; Finite impulse response filter; Frequency; Hearing aids; IIR filters; Instruments; Signal processing algorithms; Speech enhancement;
Conference_Titel :
Signals, Systems and Computers, 1993. 1993 Conference Record of The Twenty-Seventh Asilomar Conference on
Conference_Location :
Pacific Grove, CA
Print_ISBN :
0-8186-4120-7
DOI :
10.1109/ACSSC.1993.342379
