Speech Processing of the Letter 'zha' in Tamil Language with LPC

Wideband speech signals of the letter 'zha' in Tamil language of 3 males and 3 females were coded using an improved version of Linear Predictive Coding (LPC). The sampling frequency was at 16 kHz and the bit rate was at 15450 bits per second, where the original bit rate was at 128000 bits per second with the help of wave surfer audio tool. The quality of the performance is exhibited through the block diagram voice coder. In the last section, the tradeos between the bit rate for a plain LPC vocoder and the bit rate for a voice-excited LPC vocoder with DCT is analyzed.