Abstract
This chapter discusses about digital audio, its history, and its development throughout the years. The chapter also explains about sampling rate and THD + N or total harmonic distortion plus noise requirements for digital audio. The key audio specifications are THD + N, dynamic range (DNR), and signal-to-noise ratio (SNR), which are explained in detail in the chapter. It further discusses about some of the popular applications of digital audio and some typical THD + N and sample rate requirements. The demand for high performance on analog-to-digital converters (ADCs) and digital-to-analog converters (DACs) in digital audio systems is because of wide dynamic range requirements. The chapter explains about the overall trends in digital audio ADCs and DACs and Voiceband Codecs. The chapter briefs that in some devices both ADC and compatible DAC are required, and when both ADC and DAC are placed on same chip, it is a coder-decoder or codec. It also details about high-performance audio ADCs and DACs in separate packages and high-performance multichannel audio codecs and DACs. The chapter also discusses about variety of standard sampling frequencies associated with digital audio signal processing and explains about the concept of SRC.
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