3.8.5 Why Does PCM Voice Use 64 kbps?
Understand why conventional digital telephony uses an 8 kHz sampling rate and 8 bits per sample. Learn how these choices produce the standard 64 kbps voice channel used in PCM telephone systems.
- What Is a PCM Voice Channel?
- Why Is Speech Sampled at 8 kHz?
- Why Are 8 Bits Used for Each Sample?
- How Is the 64 kbps Figure Calculated?
- Why Was 64 kbps Considered a Good Compromise?
- What Is a DS0 Channel?
- Why Does PCM Use Companding?
- How Good Is 64 kbps PCM Speech Quality?
- Why Do Modern Systems Often Use Lower Bit Rates?
- If Lower Bit Rates Are Possible, Why Is 64 kbps Still Important?
- Is 64 kbps Used Outside Telephony?
- What Happened to the 64 kbps Channel in Modern Networks?
- Why Is the 64 kbps Standard Important in Communications Engineering?