University of Kansas - ECE 101

Speech Coding Demo

Original speech

• Play original at 64000 bits/second

Waveform coded speech

• ADPCM coding method
• One-half original number of bits
• Play coded speech at 32000 bits/second

Model-based coded speech

• Sinusoidal Transform Coder (STC) method
• 7.7% to 1.2% of original number of bits
• Play coded speech at 4800 bits/second
• Play coded speech at 2400 bits/second
• Play coded speech at 800 bits/second