Digital audio page
Index
- A Graphical Explanation involving Sampling
- Basics of Digital Recording - digtal audio introduction
- Consequences of Nyquist Theorem for Acoustic Signals Stored in Digital Format - published in proceedings from Acoustic Week in Canada 1991 - CAA Conference, Edmonton, Alberta, Canada, October 7 - 10, 1991, from Digital Recordings
- Digital audio lectures
- Digital audio routing and distribution
- FAQs (Frequently asked questions with answers) on Digital Signal Processing
- Introduction to Digital Recording Techniques - paper was published in Canadian Acoustical Association Journal, 1989, from Digital Recordings
- Level Practices in Digital Audio
- More Bits---Please! - how to pick right digital audio workstation (DAW)
- Principles of digital audio
- Security scheme doesn't hold water(marking) - Audio watermarking inserts media identification data within the bit stream, using techniques that its advocates claim are inaudible, but they might not be that reliable and unaudible as claimed
- Signal Processing information page
- S/PDIF IEC958 (named IEC60958 at 1998)
- The Video Engineer's Guide to Digital Audio - full book on-line
- White Paper: Digital Audio Distribution Systems - paper examines the suitability of several computer networking technologies to the task of carrying real-time digital audio
Format comparisions
Compact Disc is a stereo digital audio system based upon a 12cm single sided disc made from a polycarbonate material with an
internal reflective layer of aluminium or occasionally gold. The information is read by sensing the presence or absense of
reflected light from a tightly focused Laser beam pointing at the pits and bumps in the reflective surface within the disc. The
digital audio signal is sampled to 16 bits per channel at a rate of 44.1KHz. The major developers were Philips electronics of
Holland and Sony of Japan.
HDCD® (High Definition Compatible Digital®) is a patented encode/decodeprocess for delivering on Compact Discs and DVD-audio better than normal CD audio quality. HDCD encoded CDs are encodedso that they fit 20 bits of information onto the CD while remaining completely compatible with the existing CD format.
Dying digital tape format from Philips.
Other digital audio formats
Information on coding
Software
At the consumer level there are basically one digital S/PDIF format
which is transported using two different interfaces. One commonly used
interface option is electrical coaxial interface, using an RCA-type jack
and plug (or sometimes a BNC bayonet connector) and a shielded,
75 ohm impedance cable. Other option or consumer S/PDIF interface
is Toslink optical, which transmits the digital data in the form of
light down a plastic fiber-optic cable.
Professional audio equipments use AES/EBU format
defined by standard IEC-958, which uses a 3 pin, balanced
XLR-type connector and 3 conductor, 110 ohm impedance cable
or multimode fiber optics (AT&T or ST-Glass).
Other
General
File formats
Soundcards
Software
Related pages
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