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Wideband speech recovery from bandlimited speech in telephone communications
By: Yasukawa, H.;
1998 / IEEE / 0-7803-4455-3
Description
This item was taken from the IEEE Conference ' Wideband speech recovery from bandlimited speech in telephone communications ' This paper describes methods that can enhance the quality of speech signals that are severely band limited during regular telephone speech transmission. We have already proposed a spectrum widening method that utilizes aliasing in sampling rate conversion and digital filtering for spectrum shaping. This paper discusses the method using linear prediction. Speech components of the outbands of the received signal are basically generated by LPC (linear predictive coding) synthesis by analysis. Furthermore, we discuss a new spectrum widening method using a multilayer backpropagation neural network. It is shown that the proposed method has a good performance of recovering the wideband speech.
Related Topics
Telephony
Digital Filters
Filtering Theory
Linear Predictive Coding
Speech Enhancement
Multilayer Perceptrons
Multilayer Backpropagation Neural Network
Wideband Speech Recovery
Bandlimited Speech
Telephone Communications
Telephone Speech Transmission
Spectrum Widening Method
Sampling Rate Conversion
Digital Filtering
Spectrum Shaping
Received Signal
Lpc
Linear Predictive Coding
Synthesis
Analysis
Wideband
Telephony
Speech Enhancement
Speech Synthesis
Speech Analysis
Linear Predictive Coding
Multi-layer Neural Network
Sampling Methods
Digital Filters
Filtering
Speech Recognition
Backpropagation
Engineering