HD DVD versus Blu-ray

HD DVD vs Blu-ray, which is better? Now let's have a comprehensive understanding of both. First, what do they mean respectively?HD DVD, which is the advanced format for DVD, means High-Definition DVD or High-Density DVD, while Blu-ray, also known as Blu-ray Disc (BD) is the name of a next-generation optical disc format. They both use blue-violet laser, which has a shorter wavelength (405 nm) than red laser used in DVD and can store more data than DVD. Next, how much data can they store? Normally, HD DVD can store about 15GB on a single layer disc and 30GB on a dual layer disc. Most released HD-format movies are dual-layer discs. The storage capacity of Blu-ray disc is five times more than DVD disc. The capacity of a single layer is 25GB and dual layer has 50GB capacity, a little more than HD DVD disc, but costs a little more than HD-DVD disc, because manufacturing HD-DVD discs is easier, the process being similar to DVD manufacturing.

The war between HD DVD and Blu-ray is constantly on the go. A group of companies called BDA (Blu-ray Disc Association) supports Blu-ray technology while Toshiba supports HD-DVD technology, because the first HD-DVD player was produced by Toshiba. Although many attempts, they can not reach an agreement, so the two formats are not compatible. A Blu-ray disc can not be played on a HD DVD player and vice versa. For HD-DVD, there are three formats. They are HD-DVD only discs, hybrid discs and twin discs. We can literally know that hybrid and twin formats can be played both on DVD players and HD-DVD players. HD DVD and Blu-ray are the two advantage-edged formats and will be still the main rivals in the next years. If customers are still pondering about which to buy, you can wait and see who will be the final winner.