Digital Audio Technology: A Guide to CD, MiniDisc, SACD, DVD by Jan Maes, Marc Vercammen

By Jan Maes, Marc Vercammen

Knowledgeable workforce from SONY Europe explains the know-how in the back of trendy significant electronic audio buyer items, together with the Compact Disc, MiniDisc, tremendous Audio CD, DVD-Audio, MP3 and electronic Audio Tape.

starting with a desirable evaluate of the background of audio expertise, this fourth version addresses the foundations and applied sciences which underpin many of the codecs at the moment to be had. huge technical aspect is equipped, with large use of illustrations to augment figuring out.

Audio engineers, scholars and hi-fi fanatics who are looking to achieve an knowing of ways those applied sciences were built will locate no greater advent than this authoritative advisor from SONY, a forerunner within the electronic audio industry.

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Additional resources for Digital Audio Technology: A Guide to CD, MiniDisc, SACD, DVD

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Conversion from analog to digital signals is done in several steps: • • • • filtering – this limits the analog signal bandwidth, for reasons outlined below sampling – converts a continuous-time signal into a discretetime signal quantization – converts a continuous-value signal into a discrete-value signal coding – defines the code of the digital signal according to the application that follows. 2 shows a block diagram of an analog-to-digital conversion system. 2 An analog-todigital conversion system.

Newly developed sampling rate converters, however, also allow conversion between non-related sampling rates, so that this issue has become less important than it used to be. Sampling rates for R-DAT and S-DAT formats In the DAT specification, multiple sampling rates are possible to enable different functions: • • • 48 kHz, for highest-quality recording and playback. 32 kHz, for high-quality recording with longer recording time or for recording on four tracks and for direct (digital) recording of digital broadcasts.

A basic sample-hold circuit is a ‘voltage memory’ device that stores a given voltage in a high-quality capacitor. To sample the input voltage, switch S closes momentarily: when S re-opens, capacitor C holds the voltage until S closes again to pass the next sample. 8 is a diagram showing a sine wave at the input (top) and the output (bottom) of a sample-hold circuit. Practical circuits have buffer amplifiers at input, in order not to load the source, and output, to be able to drive a load such as an A/D converter.

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