QUOTE
Over 9 hours of high-definition (HD) video on a 50GB disc. About 23 hours of standard-definition (SD) video on a 50GB disc.
TDK recently announced that they have created a working Blu-ray disc capable of holding 200GB of data (six 33GB data layers).
VIDEO:
The codecs are compression schemes used to store audio and video information on disc. For video, all BD-ROM players must be able to decode three codecs: MPEG-2 (the standard also used for DVDs); MPEG-4's H.264/AVC; and VC-1, a codec based on Microsoft's Windows Media 9.
All Blu-ray movies released so far have chosen to use the ten year old MPEG-2 technology (that all standard DVDs use) rather than the much newer VC-1 compression technology that most HD-DVD movies use. A 25GB single layer Blu-ray disc using MPEG-2 holds two hours of high-definition video content, just like a 15GB single layer HD-DVD using VC-1 would hold two hours of high-definition video content. Most HD-DVD movies released so far use dual-layer 30GB discs that hold four hours of high-definition video content, while all Blu-ray movies released so far use a single-layer 25 GB disc that only hold two hours of high-definition video content. This is the main reason why Blu-ray discs have far fewer special features and bonus content than HD-DVD or standard DVD movies.
AUDIO:
For audio, BD-ROM players are required to support Dolby Digital and DTS, and linear PCM (up to 7.1 channels.) The standard has optional support for Dolby Digital Plus and the lossless formats Dolby TrueHD and DTS HD. The linear PCM 5.1, Dolby Digital 5.1 and DTS 5.1 formats are mandatory, meaning that one of them may be used as the sole soundtrack on a disc, because every player will have a decoder that can process any of these three bitstreams.[2] For lossless audio in movies in the PCM, Dolby TrueHD or DTS-HD formats, Blu-ray discs support encoding in up to 24-bit/192kHz for up to six channels, or up to eight channels of up to 24-bit/96kHz encoding.[3] For reference, even new big-budget Hollywood films are mastered in only 24-bit/48kHz, with 16-bit/48kHz being common for ordinary films.
For users recording digital television broadcasts, the Blu-ray's baseline datarate of 36 MB/s is more than adequate to record high-definition broadcasts. Support for new codecs will evolve as they are encapsulated by broadcasters into their MPEG-2 transport streams, and consumer set-top boxes capable of decoding them are rolled out.
The choice of codecs affects disc cost (due to related licensing/royalty payments) as well as program capacity. The two more advanced video codecs can typically achieve twice the video runtime of MPEG-2. When using MPEG-2, quality considerations would limit the publisher to around two hours of high-definition content on a single-layer (25GB) BD-ROM.
JAVA:
At the 2005 JavaOne trade show, it was announced that Sun Microsystems' Java cross-platform software environment would be included in all Blu-ray players as a mandatory part of the standard. Java will be used to implement interactive menus on Blu-ray discs, as opposed to the method used on DVD video discs, which uses pre-rendered MPEG segments and selectable subtitle pictures, which is considerably more primitive. Java creator James Gosling, at the conference, suggested that the inclusion of a Java virtual machine as well as network connectivity in BD devices will allow updates to Blu-ray discs via the Internet, adding content such as additional subtitle languages and promotional features that are not included on the disc at pressing time. This Java Version will be called BD-J and will be a subset of the Globally Executable MHP (GEM) standard. GEM is the world-wide version of the Multimedia Home Platform standard.
And the Region Codes are differents... There are less than before...
A North America, South America, East Asia except for China
B Europe and Africa
C China, Russia and other countries
TDK recently announced that they have created a working Blu-ray disc capable of holding 200GB of data (six 33GB data layers).
VIDEO:
The codecs are compression schemes used to store audio and video information on disc. For video, all BD-ROM players must be able to decode three codecs: MPEG-2 (the standard also used for DVDs); MPEG-4's H.264/AVC; and VC-1, a codec based on Microsoft's Windows Media 9.
All Blu-ray movies released so far have chosen to use the ten year old MPEG-2 technology (that all standard DVDs use) rather than the much newer VC-1 compression technology that most HD-DVD movies use. A 25GB single layer Blu-ray disc using MPEG-2 holds two hours of high-definition video content, just like a 15GB single layer HD-DVD using VC-1 would hold two hours of high-definition video content. Most HD-DVD movies released so far use dual-layer 30GB discs that hold four hours of high-definition video content, while all Blu-ray movies released so far use a single-layer 25 GB disc that only hold two hours of high-definition video content. This is the main reason why Blu-ray discs have far fewer special features and bonus content than HD-DVD or standard DVD movies.
AUDIO:
For audio, BD-ROM players are required to support Dolby Digital and DTS, and linear PCM (up to 7.1 channels.) The standard has optional support for Dolby Digital Plus and the lossless formats Dolby TrueHD and DTS HD. The linear PCM 5.1, Dolby Digital 5.1 and DTS 5.1 formats are mandatory, meaning that one of them may be used as the sole soundtrack on a disc, because every player will have a decoder that can process any of these three bitstreams.[2] For lossless audio in movies in the PCM, Dolby TrueHD or DTS-HD formats, Blu-ray discs support encoding in up to 24-bit/192kHz for up to six channels, or up to eight channels of up to 24-bit/96kHz encoding.[3] For reference, even new big-budget Hollywood films are mastered in only 24-bit/48kHz, with 16-bit/48kHz being common for ordinary films.
For users recording digital television broadcasts, the Blu-ray's baseline datarate of 36 MB/s is more than adequate to record high-definition broadcasts. Support for new codecs will evolve as they are encapsulated by broadcasters into their MPEG-2 transport streams, and consumer set-top boxes capable of decoding them are rolled out.
The choice of codecs affects disc cost (due to related licensing/royalty payments) as well as program capacity. The two more advanced video codecs can typically achieve twice the video runtime of MPEG-2. When using MPEG-2, quality considerations would limit the publisher to around two hours of high-definition content on a single-layer (25GB) BD-ROM.
JAVA:
At the 2005 JavaOne trade show, it was announced that Sun Microsystems' Java cross-platform software environment would be included in all Blu-ray players as a mandatory part of the standard. Java will be used to implement interactive menus on Blu-ray discs, as opposed to the method used on DVD video discs, which uses pre-rendered MPEG segments and selectable subtitle pictures, which is considerably more primitive. Java creator James Gosling, at the conference, suggested that the inclusion of a Java virtual machine as well as network connectivity in BD devices will allow updates to Blu-ray discs via the Internet, adding content such as additional subtitle languages and promotional features that are not included on the disc at pressing time. This Java Version will be called BD-J and will be a subset of the Globally Executable MHP (GEM) standard. GEM is the world-wide version of the Multimedia Home Platform standard.
And the Region Codes are differents... There are less than before...
A North America, South America, East Asia except for China
B Europe and Africa
C China, Russia and other countries
)