August 2013
Intermediate to advanced
360 pages
7h 23m
English
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4 Overview of A/D conversion systems
Linear (or uniform) quantization
In all the examples seen so far, the quantization intervals Q were identical. Such quantization systems are commonly termed linear or uniform. Regarding simplicity and quality, linear systems are certainly best. However, linear systems are rather costly in terms of required bandwidth and conversion accuracy. Indeed, a 16-bit audio channel with a sampling frequency of 44.056 kHz gives a bit stream of at least 16 × 44.056 = 705 × 103 bit s–1, which requires a bandwidth of 350 kHz – 17.5 times the bandwidth of the original signal. In practice, a wider bandwidth than this is required because more bits are needed for synchronization, error correction and other purposes.
Since the ...
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