Speech recognition system and method for variable noise environm

Details Speech recognition system and method for variable noise environm Speech recognition system and method for variable noise environm

1983-01-06

1986-09-02

Kemeny, E. S. Matt

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

G10L 500

Patent

active

046100237

ABSTRACT:
An automotive vehicle speech recognition system sets a recording-mode reference threshold level to be lower than a recognition-mode reference threshold level. Therefore, a spoken instruction supplied to the system in a low voice while the vehicle is parked in a quiet place during a record mode can be correlated with an instruction uttered in a loud voice during a recognition mode while the vehicle is running in a noisy environment. During the record and recognition modes reference threshold signals derived by smoothing a spoken instruction are multiplied by two different factors such that the reference threshold in the recognition mode has a greater multiplication factor than the reference threshold in the record mode. While the driver is uttering a command a first smoothed version of the utterance power spectrum is compared with a fixed reference threshold level, set to the value of a second smoothed version of the utterance power spectrum at the time the utterance began. While no command is being uttered the reference threshold varies in accordance with the second smoothed version. The first smoothed version includes higher frequency components than the second smoothed version.

REFERENCES:
patent: 3812291 (1974-05-01), Brodes et al.
patent: 4239936 (1980-12-01), Sakoe
patent: 4331837 (1982-05-01), Soumagne
patent: 4336421 (1982-06-01), Welch et al.

Affiliated with

Also associated with

Rating

Speech recognition system and method for variable noise environm does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Speech recognition system and method for variable noise environm, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Speech recognition system and method for variable noise environm will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1100913