• a.A source speech signal is encoded by an 8^th-order Linear Predictive Coding (LPC) parametric model using a frame analysis length of 20ms and with a 10% frame overlap.

  How many frames per second will be encoded by the LPC model?

  (2 marks)

• b.Following quantising in the LPC model described in part a., an average of 5 bits per frame is allocated to transmit each predictor coefficient. If it is assumed that 1 bit is allocated for the input excitation (U/V) signal, and 3 bits each are allocated to both the pitch period and amplitude gain control, what will be the output bit-rate of the LPC model?

  (3 marks)