ISCA Archive Eurospeech 2003
ISCA Archive Eurospeech 2003

Speech recognition over bluetooth wireless channels

Ziad Al Bawab, Ivo Locher, Jianxia Xue, Abeer Alwan

This paper studies the effect of Bluetooth wireless channels on distributed speech recognition. An approach for implementing speech recognition over Bluetooth is described. We simulate a Bluetooth environment and then incorporate its performance, in the form of packet loss ratio, into the speech recognition system. We show how intelligent framing of speech feature vectors, extracted by a fixed-point arithmetic front-end, together with an interpolation technique for lost vectors, can lead to a 50.48% relative improvement in recognition accuracy. This is achieved at a distance of 10 meters, around the maximum operating distance between a Bluetooth transmitter and a Bluetooth receiver.