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In addition to the MPEG-2 format used by DVD-Video, the BD-Video disc uses video codes, such as MPEG-4 AVC and VC-1, which deliver high image quality using high compression rates. The data transfer speed is 48 Mbps, which is about five times faster than DVD. A future plan also calls for a further increase in the data transfer speed. These technologies allow long-time playback of content with high-definition image quality.
|Maximum data transfer rate||48 Mbps|
|Resolution and frame rate||1920
1440 x 1080*
1280 x 720
720 x 480
720 x 576
50i, 23.976p, 24p
59.94i, 50i, 23.976p, 24p
59.94p 50p, 23.976p, 24p
The BD-Video disc optionally supports next-generation surround sound formats like Dolby Digital Plus. Connecting a BD-Video player to an AV center using an HDMI* cable enables linear PCM multi-channel data transfer. This makes it possible to reproduce high-quality 7.1-channel surround sound with each channel offering DVD-Audio quality, delivering a surround sound experience that rivals the quality of the master audio source.
* HDMI Ver. 1.1 and newer.
The BD-Video disc boasts a data storage capacity of 25GB* in a single layer and 50GB* in dual layer, because it uses the shorter wavelength blue-violet laser and a high-density objective lens to enable higher-density data reading. When a multi-layer system is adopted in the future, the storage capacity can increase to 100 GB* and even 200 GB*. One BD-Video disc can store a huge amount of data so users can enjoy many hours of high-definition content and high-quality surround sound that could not previously be provided by other media.
Structure of the BD-Video Disc
Some BD-Video disc is equipped with an extended function based on Java™ technology, called BD-J, to provide various interactive features. For example, this can be used to program various operations, such as displaying a pop-up menu while playing a BD-Video disc, and activating a keyword search. With unlimited application possibilities, BD-J offers interactive enjoyment that is simply not possible with conventional AV software.
The Blu-ray Disc specifications have been established mainly by leading electronics, PC and gaming manufacturers around the world, including Panasonic. These companies will support BD promotion by introducing a variety of hardware. A number of major motion picture production companies have expressed their support. A variety of software can be expected to hit the market before long.