FULL-SIZE 120MM DISCS Record -Modes- Layers GB Hours ROM RE R DVD (480/576 lines) Single (DVD-5) 4.3 2 X X X Dual (DVD-9) 7.9 4 X X X BLU-RAY (1,080 lines) Single 25 4. For several years, Blu-ray competed with HD DVD for the new high-res standard, but HD DVD was later abandoned (see HD DVD). Blu-ray HistoryIn 2003, the first Blu-ray recorders were sold in Japan, and in 2006, Sony's PlayStation 3 was one of the early products to feature a Blu-ray drive (see PlayStation). BD-Live (Profile 2) requires 1GB of flash to access content from the Internet such as scenes that were cut, interviews with the director and actor history. Bonus View (Profile 1.1) requires 256MB of flash memory and uses a second A/V codec for running picture-in-picture commentary. Commentary and Extra ContentAll players support Profile 1.0.
Blu-ray players read CDs and DVDs, support navigation via menus programmed in Java and feature advanced audio and video formats (see Java, Dolby Digital, DTS, H.264, VC-1). These stringent audio and video specifications have been defined by a certification committee of IMAX, DTS and Hollywoods leading technical specialists to. NTSC format is 480 lines, PAL format is 576 lines).
As a result, movies with 1,080 lines of resolution can be recorded, compared to 480 or 576 for a DVD (U.S. Developed primarily by Sony, Blu-ray discs have the same diameter as DVDs, but the pits are a third the size on tracks packed more tightly together.
The current optical disc format for high-definition (HD) video at 2K resolution (for 4K Blu-ray, see Ultra HD Blu-ray).