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JVC XRCD ~全攻略~ 已陆续加入中文解说 [复制链接]

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回复: JVC XRCD ~全攻略~ 已陆续加入中文解说

K2泛指光碟从录音,混音,母带后期制作,到生产光碟这一连串步骤,所使用的提升音质的软硬体技术。 20bit K2,或者K2 HD,则是专指母带后期制作时,所使用的mastering技术。例如K2独门的dithering,将原始20bit的资料带进CD规格的16bit里,所以称为20bit K2。
然而这种dithering的技术,各家都有,不是只有JVC有,例如SONY也有SBM。所以K2可以说只是不同的mastering理念,会特别强化某些特色,让声音比较突出。
因此,K2不需要特别的解码器来解码,它只是一般普通的msatering系统,做出来的还是一般普通的CD,用一般普通的播放器就可以播放。
虽然说明书上会提到K2 Enocder,K2编码器,但是这只一个耍帅的名词而已,目的是要让你觉得它的技术很高深,但是其实它并不需要一个相对应的Decoder解码器,才能解出它的效果。
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32#

回复: JVC XRCD ~全攻略~ 已陆续加入中文解说

XRCD = Extended Resolution Compact Disc:

XRCD (short for eXtended Resolution Compact Disc) is a special mastering and manufacture process patented by
JVC that is used for producing high fidelity redbook Compact Discs. It was first introduced in 1995.

Overview
XRCDs are in every aspect regular CDs that just have been manufactured to stringent quality standards. This means that they can be played on any conventional compact disc player. It is interesting to note that an XRCD is supposedly priced about twice as high as a regular full-priced CD. JVC attributes this to the high cost of the quality mastering and manufacturing process.

Mastering process

If digital, the source material is first converted to analogue with a K2 20-bit or 24-bit digital-to-analog converter. The signal is then digitized with JVC's K2 analog-to-digital converters. This musical information is next encoded on a magneto-optical disk for transportation.

The disk is sent to JVC's Yokohama manufacturing plant, where after reducing jitter and distortion the musical signal is down-converted to 16-bit through a K2 "super coding" process. This 16-bit signal is then EFM-encoded before going through a high-precision DVD K2 laser using a proprietary "Extended Pit Cut" technology. This optimizes the linear velocity of the glass master (giving precise pit lengths), as well as eliminating any time jitters, all the while controlled by an extremely accurate Rubidium clock. All CDs are then stamped directly from the glass master.

XRCD2 and XRCD24 are improved versions of the original XRCD process. XRCD2 is the first to record to a magneto-optical disk via the digital K2 regenerator. XRCD24 upgraded the transported music signal's bit width from 20 to 24 bits.
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