HD DVD

HD DVD was a high-definition optical disc format that emerged as a successor to the DVD. It was developed to store high-definition video, offering significantly greater storage capacity than standard DVDs. This was achieved by using a blue-violet laser with a shorter wavelength, allowing for smaller pits and more tightly spaced tracks on the disc.12

HD DVD was one of two competing technologies, alongside Blu-ray, introduced in 2002. Both formats used blue-violet lasers but had different storage capacities: HD DVD offered 15 gigabytes on a single-sided, single-layer disc, while Blu-ray offered 25 gigabytes. The competition between these incompatible formats led to consumer reluctance and uncertainty within the entertainment and technology industries. Ultimately, in 2008, the entertainment industry favored Blu-ray, and development of HD DVD was discontinued.12