May 2024
Intermediate to advanced
309 pages
13h 33m
English
Content preview from Data Communications and Computer Networks by Pearson
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Analog and Digital Transmission 53
The effect of quantization error can be minimized by using a process called companding and
expanding. This process uses a compressor before encoding and uses an expander after decoding.
Companding refers to decreasing the instantaneous voltage amplitude for larger values while
expanding refers to increasing the instantaneous voltage amplitude for smaller values. This helps
to improve the SNR
dB
of the signal.
3. Encoding: After quantization, encoding is done in which each sample is converted to m-bit codeword
where m is equal to number of bits per sample (n
b
). The value of n
b
depends on the value of ...
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