Digital Signal Processing Reference
In-Depth Information
11.15.
For a 3-bit DPCM encoding system shown in Problem 11.13 and the given 5-bit input data
xð
0
Þ¼
6,
xð
1
Þ¼
8, and
xð
2
Þ¼
13, perform DPCM encoding to produce the binary code
for each of input data.
11.16.
For the 3-bit DPCM decoding system shown in Problem 11.14 and the received data 010,
000, 001, perform DCPM decoding to recover each digital value using its binary code.
11.17. Assuming that a speech waveform is sampled at 8 kHz and each sample is encoded by
16 bits, determine the compression ratio for each of the following encoding methods:
a. no compression
b. standard
m
-law compression (8 bits per sample)
c. standard ADPCM encoding (4 bits per sample)
11.18. Assuming that a speech waveform is sampled at 8 kHz and each sample is encoded by
16 bits, determine the bit rate for each of the following encoding methods:
a. no compression
b. standard
m
-law companding (8 bits per sample)
c. standard ADPCM encoding (4 bits per sample)
11.19. Assuming that an audio waveform is sampled at 44.1 kHz and each sample is encoded by
16 bits, determine the compression ratio for each of the following encoding methods:
a. no compression
b. standard
m
-law compression (8 bits per sample)
c. standard ADPCM encoding (4 bits per sample)
11.20. Assuming that an audio waveform is sampled at 44.1 kHz and each sample is encoded by
12 bits, determine the bit rate for each of the encoding methods.
a. no compression
b. standard
m
-law companding (8 bits per sample)
c. standard ADPCM encoding (4 bits per sample)
11.21.
Speech is sampled at 8 kHz and each sample is encoded by 16 bits. A telephone system can
transport the digital voice channel over a digital link with a capacity of 1.536 MBPS.
Determine the number of channels that the phone company can carry for each of the
following encoding methods:
a. no compression
b. standard 8-bit
m
-law companding (8 bits per sample)
c. standard ADPCM encoding (4 bits per sample)
11.22. Given the input data
xð
0
Þ¼
25
; xð
1
Þ¼
30
; xð
2
Þ¼
28
;
and
xð
3
Þ¼
25
determine the DCT coefficients.
Search WWH ::
Custom Search