| 摘要 |
PURPOSE:To enhance the predictive accuracy as well as to increase the average S/N and to decrease the effect of the slope overload, by using both the signal reproduction value preceding by one sample and the prediction error then. CONSTITUTION:Predictive error Xa between sampling value S obtained by sampling (a) the input signal and predictive value Pa is compressed (2) and then transmitted to the reception side via transmitter 7. In this case, compressed signal Ya is expanded (3) to obtain companding signal Qa. Value Pa is added (6)to signal Qa to obtain signal reproduction value Ra. Based on value Ra, predictive value Pa+1 of the next sampling time may be set through predicting unit 4a to be the sum of value Ra and the value obtained by multiplying signal Qa by fixed coefficient alpha. |
