共查询到20条相似文献,搜索用时 78 毫秒
1.
据美国DISK/TREND公司预测,到2001年,DVD-ROM设备的产量为7972.7万台,将超过CD-ROM设备的4605.3万台。1997年DVD-ROM设备实际生产119.9万台,约为CD-ROM7458.1万台产量的六十分之一。此后DVD-ROM设备将迅速增长,预计CD-ROM设备产量在1999年达到颠峰的8729.5万台后开始下降。可写入的光盘设备(包括可写入一次和可改写型)当中,符合CD及DVD格式的(CD-R、CD-RW、DVD-RAM等)将占优势。可写入式DVD机器将在2000年以后大量增加。容量在4GB以上的光盘设备,包括美国TeraStor公司和Quinta公司从… 相似文献
2.
严国荣 《激光与光电子学进展》1997,34(7):10-13
1.引言从1993年开始,全世界CD-ROM的市场需求迅速上升,且其势头只增不减。短短几年来,CD-ROM驱动器的装机台数已达到1亿台,用户遍及各行业。在这样背景下,对可写光盘甚至是可改写光盘的推动也空前强劲起来。一些公司正在寻求创作自己的CD-ROM,用650MB的光盘来发布其数据;而另一些公司甚至希望把它们当作软盘使用。显然,不管是可写光盘或可改写光盘,它们的格式必须后向兼容。也就是说,写在这类光盘上的数据必须能在现有CD-ROM驱动器上读得出来。积累多年来在相变型光盘的开发与生产方面的经验,松下终于捷足先登,于… 相似文献
3.
1995年初,PHILIPS和SONY公司联合推出12cm的全数字视盘标准即DVD(DIGITALVIDEODISC),随后TOSHIBA、TIMEWARNER、JVC等公司又推出新的标准,DVD形成两大阵营,在物理格式和存储方式上并末统一,但都认可DVD的文件结构采用UDF的光盘格式标准,基本上可以保证通用。DVD的物理尺寸和形状与CD-ROM相同,由两个原06mm的基层粘成,采用短波长的红色激光器或波长更短的蓝一绿激光器,基片上的凹槽更细、道间距更小,所以数据存储量比CD-ROM大得多。DVD的存储方式主要有两种,即可以单面存储也可以双面存储而且… 相似文献
4.
5.
本文介绍了一种用高级语言编程实现MCU内嵌MASK ROM版图的程序生成方法,生成版图的格式为CIF格式。 相似文献
6.
汪莉 《信息技术与标准化》2000,(6)
MPEG- 4标准已由 ISO发布,多媒体应用标准领域又添新丁。 多媒体领域的前两个标准—— MPEG- 1和 MPEG- 2分别对应于 CD- ROM和数字电视,而 MPEG- 4介绍了几种新的发展。例如,它使用户拥有访问多媒体信息的多种通道。用户不依赖于任何一种分布系统——网络、无线中继、微波束、卫星系统、无线等等,因为其信息通过所有这些信道以同一种标准格式准确的传输。这个标准将通过多种途径对公众产生影响,例如允许每个人切换和编辑音视频素材,而目前的可能性仅仅能使专业人员使用复合的演播室技术。 多媒体又添新标准@汪… 相似文献
7.
目前,DVD—ROM的价格在逐步降低,DVD-ROM已经被越来越多的电脑用户所使用。由融华康伟业科技有限公司推出的摩西DVD—ROM是一款采用市场上主流规格的16倍速DVD产品。摩西DVD—ROM,支持多种类光盘格式,可以兼容DVD—ROM,CD—R,CD—RW,Photo CD,Video CD等等,读取功能还是比较齐全的。在硬件规格方面,摩西DVD—ROM采用TCAV技术,具有512KB的缓存。此款DVD-ROM为IDE传输接口,DVD读取速度为16倍速,CD读取速度为40倍速。在厂商的产品规格资料中,此款DVD—ROM的平均寻道时间,DVD部分少于100ms, 相似文献
8.
阿帕奇这款16倍速DVD- ROM产品的型号为CD_1648,采用托盘式结构,CD-ROM支持倍速已经提高到48倍速。在产品规格方面,支持Ultra ATA/33传输规格,缓存容量为256kB。在光盘格式方面,除支持大多数常用的CD格式以外,还支持DVD-R以及DVD-RW等DVD光盘格式,对于目前DVD的用途来说,已经足够了。 相似文献
9.
10.
11.
简要地介绍和讨论了DVD的三种可重写光盘即DVD—RW、DVD RW和DVD—RAM的特点和格式。 相似文献
12.
YAN Ming DAI Jian-hua HU Guo-rongGxSOC Research Institute Communication University of China Beijing P.R. China 《中国邮电高校学报(英文版)》2006,13(2):74-78
1Introduction Chinahasthelargestmarketofaudio visualequip mentintheworld,whichisrapidlydevelopedfrom VCD,SVCDtoDVD.Now,themarketofDVDisin creasedveryfast,especiallyintheinternationalmarket(increasingbyafactorof25%everyyear).Butitis limitlessforpeopletohan… 相似文献
13.
《Spectrum, IEEE》1998,35(1):57-61
The consumer electronics industry is wary of a format war, like the one between the Betamax and VHS formats in the late 1970s, which slowed acceptance of the new videocassette-recorder technology and eventually stuck buyers of the losing format with expensive doorstops. Ever since, large consortia of consumer electronics companies have toiled hard to develop industry standards whenever new technologies loomed. As 1997 dawned, such efforts seemed to work: new standards launched the digital video disk (DVD) and digital television, and a cable-modem standard appeared imminent. But a look ahead into 1998 shows the standards fragmenting. The many faces of DVD, whether or not to use high definition for television, and digital still cameras, are discussed 相似文献
14.
This paper analyzes the bandwidth of high-speed photodiodes in a fully standard 0.18 μm CMOS technology for the CD/DVD optical pick-up units. Three diode structures are investigated: nwell/p-substrate, p+/nwell/p-substrate and p+/nwell. The photodiode performances are compared for λ = 780 nm and λ = 650 nm wavelength, corresponding to the lasers for CD and DVD, respectively. Slow substrate photocurrent component limits the bandwidth of nwell/p-substrate and p+/nwell/p-substrate photodiodes to 6 MHz and 7 MHz for a CD application as well as 70 MHz and 100 MHz for a DVD application. The third analyzed photodiode has bandwidth in the low GHz range for both applications, with the cost of at least 12 dB lower responsivity. 相似文献
15.
VC-1 is a new video coding standard developed by Microsoft and standardized by the SMPTE. VC-1 is one of the three video compression algorithms standardized for high definition DVD. With high definition DVD players expecting to support MPEG-2, H.264, and VC-1, end users do not have to be concerned about the coding formats. The VC-1 standard offers a competitive quality-complexity tradeoff compared to H.264, especially for high-definition services. With a diverse digital video market, we can expect to see VC-1 co-existing with H.264 in the next generation of broadband and broadcast video services. 相似文献
16.
本文简述光盘存储技术的发展趋向 ,从声音光盘 (CD)至图视光盘(VCD) ,再至数字多用途光盘 (DVD) ,在容量、速率和质量都有显著改进。还分别说明DVD光盘本身以及它使用的播放机、显像管和立体声放音系统概况。 相似文献
17.
18.
《Multimedia, IEEE》1999,6(3):86-92
DVD (digital video disc, or digital versatile disc) is the next generation of optical disc storage technology. It's essentially a bigger, faster compact disc (CD) that can hold video as well as audio and computer data. DVD aims to encompass home entertainment, computers and business information with a single digital format, eventually replacing audio CD, videotape, laser disc, CD-ROM, and perhaps even video game cartridges. DVD has widespread-and unprecedented-support from all major electronics companies, all major computer hardware companies and most major movie and music studios, which says much for its chances of success. DVD-ROM holds computer data read by a DVD-ROM drive hooked up to a computer. DVD-Video is an application built on top of DVD-ROM. DVD-Video holds video programs played in a DVD player hooked up to a TV. The difference between DVD-ROM and DVD-Video resembles that between CD-ROM and audio CDs, including the important point that DVD-Video discs can be played in computers 相似文献
19.
20.
CD/DVD ROM目前已成为便携式电脑的标准设备,OZ168芯片采用AudioDJ^TM技术,可保证在电脑不开机的情况下欣赏CD音乐,从而将便携式电脑转变成随身携带的CD机,这一方案可大大降低电脑电池消耗,最大限度地延长工作时间。文中介绍了OZ168的主要特点、结构功能,给出了其应用电路。 相似文献