What are the key differences between Blu-ray Disc and HD-DVD?
There are several very important differences between the Blu-ray and HD-DVD formats but here are the 3 key ones: Capacity: Because Blu-ray utilizes a lens with a greater numerical aperture (NA) than HD-DVD, the laser spot can be focused with greater precision to fit more data on the same size disc. This allows Blu-ray to hold 25GB per layer (50GB on a dual-layer disc), whereas HD-DVD can only hold 15GB per layer (30GB on a dual-layer disc). Blu-ray has also adopted a higher data transfer rate for video and audio (54Mbps vs 36.55Mbps). The greater capacity and data transfer rates will allow movie studios to release their movies with higher quality video and audio than the HD-DVD format. Content: The Blu-ray format has received broad support from 7 major movie studios as a successor to today’s DVD format, ensuring the broadest hi-def content will be available. Hardware Support: The Blu-ray format has broad support from the world’s leading consumer electronics, personal computer and media
• Industry Support Blu-ray Disc Apple; Dell Inc.; Hewlett Packard Company*; Hitachi, Ltd.; LG Electronics Inc.; Mitsubishi Electric Corporation; Panasonic (Matsushita Electric); Pioneer Corporation; Royal Philips Electronics; Samsung Electronics Co., Ltd.; Sharp Corporation; Sony Corporation; Sun Microsystems; TDK Corporation; Thomson; Twentieth Century Fox; and Walt Disney Pictures and Television, Warner Bros* **The Blu-ray Disc Association has over 170 members. *Supporting both formats HD-DVD Toshiba, NEC*, Memory-Tech, Microsoft, Intel, Sanyo*, HP* *Supporting both formats • Studio support Blu-ray Disc Lions Gate, MGM, Sony Pictures Home Entertainment, Twentieth Century Fox, Walt Disney Pictures and Television, (including Walt Disney Home Entertainment, Hollywood Pictures Home Video, Touchstone Home Entertainment, Miramax Home Entertainment, Buena Vista Home Entertainment, Dimension Home Video and Disney DVD), Warner Bros. (including New Line Cinema and HBO Video) have publicly anno
