Presentation	1998/6/30 The Degradation of sound quality special to CD's : CD materials affect the sound quality Toshiaki Hioki,
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Abstract(in Japanese)	(See Japanese page)
Abstract(in English)	I examined the degradation of the sound quality depending on CD materials. I confirmed that substrate material, colors of the label, freezing, annealing and disc shape change the sound quality. This means that the characteristics of the CD materials related to the wavelength of the pick-up laser diode disturb the laser beam, so that the reproduced digital signal has a jitter component which would degrade the sound quality. To protect the sound quality from the disturbance special to CD materials, we have to realize the CD player which has a sufficient power line, a sufficient earth line and jitter-free signal processing independent on a linear time axis.
Keyword(in Japanese)	(See Japanese page)
Keyword(in English)	CD / Compact Disc / Jitter / Laser / Sound Quality
Paper #	EA98-27
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Conference Information
Committee	EA
Conference Date	1998/6/30(1days)
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Paper Information
Registration To	Engineering Acoustics (EA)
Language	JPN
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	The Degradation of sound quality special to CD's : CD materials affect the sound quality
Sub Title (in English)
Keyword(1)	CD
Keyword(2)	Compact Disc
Keyword(3)	Jitter
Keyword(4)	Laser
Keyword(5)	Sound Quality
1st Author's Name	Toshiaki Hioki
1st Author's Affiliation	Sanyo Electric Co., Ltd.Hypermedia Research Center()
Date	1998/6/30
Paper #	EA98-27
Volume (vol)	vol.98
Number (no)	158
Page	pp.pp.-
#Pages	7
Date of Issue