Stunning Picture Quality
While previous optical disc technologies such as DVD relied on a red laser to read and write data, Blu-ray uses a blue-violet laser, which has a shorter wavelength, making it possible to focus the laser spot with even greater precision. This allows data to be packed more tightly and stored in less space, so it's possible to fit much more data on the disc even though it's the same size as a DVD. This, together with the change of numerical aperture from 0.60 to 0.85, is what enables Blu-ray Disc™s to hold 25GB/50GB.
For consumers, this means that Blu-ray has much sharper and clearer images than a DVD, while holding room for extra material as well. In addition, while a DVD sandwiches data between a pair of polycarbonate layers, Blu-ray places this information on top of a single piece of polycarbonate. That puts the data closer to the laser and makes for a more accurate reading.
Thanks to a faster bit rate and more storage space, Blu-ray technology can not only deliver greater picture quality but also provide up to 7.1 channels of "uncompressed" Linear PCM surround sound. The Blu-ray Disc™ format is also capable of supporting advanced audio formats like Dolby™ TrueHD or DTS™ HD, translating to an audio experience closer to the way the work was intended. To get a better perspective, it might be helpful to explain to customers that, just as a CD sounds better in general than an MP3 of that CD, Blu-ray Disc™ media soundtracks with the new audio formats sound better than their DVD counterparts.
Ability to Upscale Existing DVDs
Blu-ray Disc™ players can play your customers' existing DVDs and make them look even better on HDTVs by upscaling them to near HD quality. This process uses high-bandwidth digital-to-analog conversion and processing to detect image changes at the pixel level, rather than at the level of whole scan lines. Additionally, separate algorithms are used to process the moving and still parts of an image, resulting in sharp backgrounds with moving objects that are free from motion artifacts. As a result, your customers can enjoy their current collection of DVDs even more after upgrading to Blu-ray.