POPMusic 版 (精华区)

作  家: pcy (po) on board 'Music'
题  目: DVD 技术参数表
来  源: 哈尔滨紫丁香站
日  期: Wed Aug 27 13:32:32 1997
出  处: bbs@bbs.orange.sjtu.edu.cn

发信人: howe (无痕), 信区: HiFi
标  题: DVD 技术参数表 
发信站: 饮水思源站 (Sat Aug  9 00:12:09 1997) , 转信

标  题: DVD 技术参数表
发信站: 武汉白云黄鹤站 (Sat Aug  2 05:35:37 1997) , 站内信件


               CD                DVD

 Disc diameter 120 mm            120 mm

 Disc          1.2 mm            1.2 mm
 thickness

 Disc                            Two bonded
 structure     Single substrate  0.6 mm substrates

 Laser         780 nm            650 and 635 nm
 wavelength    (infrared)        (red)

 Numerical
 aperture      0.45              0.60

 Track pitch   1.6 um            0.74 um

 Shortest
 pit/land      0.83 um           0.4 um
 length

 Data layers   1                 1 or 2

                                 Single layer: xxxx
 Data capacity Aprox. 680        4.7GB x 2
               megabytes         Dual layer: xxx x
                                 8.5GB x 2

 Reference     Mode 1: 153.6     1,108
 user data     kilobytes/sec     kilobytes/sec,
 rate          Mode 2: 176.4     nominal
               kilobytes/sec



              Video CD       DVD-Video

              1.44           1 to 10 megabits/sec
 Video data   megabits/sec   variable
 rate         (video,        (video, audio,
              audio)         subtitles)

 Video
 compression  MPEG1          MPEG2

                             Mandatory (NTSC):
                             2-channel linear PCM
                             and/or
 Sound tracks 2              2-channel/5.1-channel
              Channel-MPEG   Dolby Digital (AC-3).
                             Optional:
                             up to 8 streams of data
                             available

 Subtitles    Open caption   Up to 32 languages
              only

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※ 来源:·武汉白云黄鹤站 s1000e.whnet.edu.cn·[FROM: bbs.sjtu.edu.cn]
--
※ 来源:·饮水思源站 bbs.sjtu.edu.cn·[FROM: bbs@s1000e.whnet.edu]

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※ 来源:·哈尔滨紫丁香站 bbs1.hit.edu.cn·[FROM: bbs@bbs.orange.sjtu.] 
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