蓝光和HD DVD之间的区别

1.蓝光：
蓝光是由蓝光光盘协会开发的大数据存储的数字光盘，能够以高清格式存储许多小时的视频。在蓝光中，原始数据，音频以及视频和视频的最大比特率分别为53.95 Mbps，48 Mbps和40 Mbps。它比DVD厚，但类似于HD DVD。

2.高清DVD：
HD DVD代表高清数字多功能光盘的缩写。它是由DVD Forum Toshiba开发的。它是DVD的后继产品，DVD是一种用于存储比DVD更大的数据并播放高清视频的光盘。在HD DVD中，原始数据，音频以及视频和视频的最大比特率分别为36.55 Mbps，30.24 Mbps和29.4 Mbps。

蓝光和HD DVD之间的区别：

S.NO	Blu-ray	HD DVD
1.	Blu-ray has a single layer storage size of 25 GB.	While HD DVD has a single layer storage size of 15 GB.
2.	The Blu-ray laser wavelength is 405 nanometers.	While its laser wavelength is also 405 nanometers but lower than the DVD laser wavelength.
3.	The Blu-ray numerical aperture is 0.85.	While its numerical aperture is 0.65.
4.	In Blu-ray, hard coating of the disc is mandatory.	Whereas in HD DVD, hard coating of disc is optional.
5.	Blu-ray has a double layer storage size of 50 GB.	While HD DVD has a double layer storage size of 30 GB.
6.	Blu-ray is more expensive than HD DVD.	While it is cheaper than Blu-ray.
7.	The Blu-ray Disc Association developed Blu-ray.	Whereas it is developed by DVD Forum Toshiba.
8.	The Blu-ray data transfer speed is 4.5 MB/sec.	While its data transfer speed is around 4.5 MB/sec which is higher than DVD.