Method and arrangement for reconstruction of a received speech s

Details Method and arrangement for reconstruction of a received speech s Method and arrangement for reconstruction of a received speech s

1997-03-25

2000-09-19

Dorvil, Richemond

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704219, G10L 1912

Patent

active

061226076

ABSTRACT:
The present invention relates to a method and an arrangement for reconstruction of a received speech signal (r), which has been transmitted over a radio channel that has been subjected to disturbances, such as, e.g., noise, interference or fading. A speech signal (r.sub.rec), where the effects from these disturbances are minimized, is generated by an estimated speech signal (r), corresponding to expected future values of the received speech signal (r), produced according to a linear predictive reconstruction model in a signal modelling circuit. The received speech signal (r) and the estimated speech signal (r) are combined in a signal combination circuit according to a variable ratio, which ratio is determined by a quality parameter (q). The quality parameter (q) may be based on measured power level of a received power level of the desired ratio signal in proportion to an interfering radio signal or a bit error rate signal or bad frame indicator, which has been calculated from data signal that has been transmitted via a certain radio channel and which represents the received speech signal.

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