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The Super Audio CD Format
Because there's so much more to hear.™
Super Audio CD is the most fundamental improvement in digital music
reproduction since the CD itself. No surprise. It comes from the people who
invented the CD: Sony and Philips.
Direct Stream Digital™ encoding
Other digital systems—including the very latest designs—use Pulse Code
Modulation (PCM). Unfortunately, PCM record/playback systems require
decimation and interpolation filters that can cause problems, including
requantization noise, passband ripple and ringing. These degradations can
smear musical overtones, muddy the soundstage and compromise overall
transparency. Simply increasing the PCM word length to 24 bits or increasing
the PCM sampling rate to 96 kHz does nothing to overcome these fundamental
problems.
Compared to CD, Super Audio CD is far simpler. Super Audio CD
eliminates decimation and interpolation filters.
Direct Stream Digital processing eliminates these problems by eliminating
the filters. It enables a 1-bit signal to be recorded directly. Sony's 1-bit system
encodes music at an astonishing 2,822,400 samples per second.
Thanks to DSD encoding, the Super Audio CD format offers frequency
response to 100 kHz and a theoretical dynamic range of more than 120 dB. But
specifications alone cannot express the DSD advantage. DSD one-bit encoding
strips away entire classes of distortion that have always characterized PCM. The
DSD system provides nothing less than a quantum leap in music resolution.
ES Series DVD-Video/CD/SA-CD Players; Version 3.0
Appendix B:
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