Page 202 - Asterisk™: The Future of Telephony
P. 202
0110
0101
0100
0011
0010
0001
Amplitude 0000
1000
1001
1010
1011
1100
1101
Samples
Figure 7-6. Delineated signal
01111
01011
01010
01001
01000
00111
00110
00101
00100
00011
00010
Amplitude 00001
00000
10001
10010
10011
10100
10101
10110
10111
11000
11001
11010
11011
11100
1 2 3 4 5 6 7 8 9 10 1112 13 14 15 1617 18 19 202122 23 24 2526 27 28
Samples
Figure 7-7. The same waveform, on a higher-resolution overlay
In reality, there is no such thing as five-bit PCM. In the telephone net-
work, PCM samples are encoded using eight bits. #
# Other digital audio methods may employ 16 bits or more.
174 | Chapter 7: Understanding Telephony
