论文部分内容阅读
Blu-ray Disc(简称BD)和HD DVD作为下一代高清影碟标准的两大竞争对手,都是采用蓝光技术,利用波长较短(405nm)的蓝色激光读取和写入数据,而传统DVD需要光头发出红色激光(波长为650nm)来读取或写入数据。通常来说波长越短的激光,能够在单位面积上记录或读取更多的信息,因此,蓝光技术极大地提高了光盘的存储容量。BD光盘结构为1．1mm盘片+0．1mm保护层,光盘容量大,单面单层25G,单面双层50G。而HD DVD虽然也采用蓝光,但光盘结构和DVD相同,单面单层15G,单面双层30G。由于蓝光BD和HD DVD播放机均无产品在国内上市,因此本次推荐的均为海外型号,但其中不少已经在国内亮相,下面让我们先睹为快。
Both Blu-ray Discs (BDs) and HD DVDs, the two major rivals of the next generation of high-definition video discs, employ blue-ray technology to read and write data using shorter-wavelength (405nm) blue lasers while traditional DVDs Need to send a red laser head (wavelength 650nm) to read or write data. In general, the shorter wavelength laser can record or read more information per unit area, so the Blu-ray technology greatly improves the storage capacity of the optical disc. BD disc structure is 1.1mm disc + 0.1mm protective layer, the disc capacity, single-sided single-layer 25G, single-sided double 50G. The HD DVD Blu-ray though, but the same structure and DVD disc, single-sided single 15G, single-sided double 30G. As Blu-ray BD and HD DVD players are not listed in the domestic market, this is recommended for overseas models, but many of them have been unveiled in the country, let’s preview first.