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Imprimir páginaUV22HR in the Internet Audio Environment
Digital systems are not perfect: high quality signals are degraded by
transferring them to lower-quality media such as Internet audio, or even
CD.
When you convert a signal in this way, you are throwing away detail,
which reduces the quality.
You can't simply throw bits away: you need to retain the detail. How?
In the analog world, a signal could be faded down to nothing and would
smoothly disappear through the noise floor. You could hear detail
through the noise.
Digital audio isn't like that: run out of bits and the sound stops.
You need a method of smoothing out digital audio at low level. How?
The answer is dither – a noise signal added to the digital audio to
smooth out transitions.
Unfortunately, most dither causes as many problems as it solves:
o Adds noise
o Detail is lost in the noise
o Noise sounds objectionable
Many solutions were tried: the best is Apogee's solution, UV22
UV22: Sub-Nyquist dither, keeps the dither signal above the audible
range.
Developed in 1993 – now the mastering industry standard. 80% of
albums mastered with UV22.
New improved version released in 1999: UV22HR "High Resolution".
UV22HR offers increased benefits for mastering, plus outstanding
benefits for Internet, multimedia and computer audio
Smaller file sizes without loss of quality
Fewer artifacts, better audio quality
Easy to incorporate into the OS to process all audio leaving the system
Apogee's UV22HR: The solution to better digital audio for new media.
An Overview