BLU RAY DISCS- FAQs

How fast are BD discs written and read?

At single speed (1x) information is written to or read from a BD disc at 4.29 MB (4,495,625 bytes or 35,965,000 bits) per second. Spinning the disc at higher velocities increases these rates, which are then expressed as multiples of these figures (e.g. 2x, 4x, 6x, etc.).

To accommodate its extended set of features (high bitrate video and audio encoding, out-of-mux streams, etc.), a BD-ROM AV disc is played at 1.5x speed (6,743,438 bytes or 53,947,500 bits per second) to achieve normal viewing speed.

How much time does it take to write a BD-R and BD-RE disc?

BD-RE was first introduced to market with 1x (CLV) writing but both BD-RE and BD-R specifications now define 1x and 2x (CLV) operation. Since 1x BD writing transfers 4.29 MB (4,495,625 bytes) of data per second it takes, roughly, 93 minutes to write a full 25 GB disc or 46 minutes at 2x [(25,025,315,816 bytes ÷ 4,495,625 or 8,991,250 bytes per second) ÷ 60 seconds = 92.78 or 46.39 minutes].

What computer operating system is required to play BD movies?

According to recommendations from CyberLink, InterVideo, ArcSoft and Nero, to play BD movies a PC system must have either Windows XP SP2 or Vista installed. No Mac OS or Linux support is yet available.

What type of computer software is required to play BD movies?

As with traditional DVD, playback software is required to view BD movies on a computer. It can be purchased separately, as part of a larger package or bundled with a drive or recorder. Like consumer electronics (CE) players, various programs support different BD features and capabilities (BD-Video, BD-Live, audio codecs, etc.). Be aware that Internet access is necessary to periodically renew the Advanced Access Content System (AACS) encryption key required by commercial movies. As of Apr. 2007, CyberLink, InterVideo, ArcSoft and Nero offer playback software for PC systems but no Mac OS and Linux versions are yet available.

How much computer system memory is required to play BD movies?

According to recommendations from CyberLink, InterVideo, ArcSoft and Nero, to play BD movies a PC system must realistically be equipped with at least 1 GB of RAM.

What type of computer CPU is required to play BD movies?

According to recommendations from CyberLink, InterVideo, ArcSoft, Nero and NVIDA, to satisfy the significant processing demands of playing BD movies a PC system must realistically be equipped with a high performance dual-core CPU. Also note that playing VC-1 and MPEG-4 AVC/H.264 titles may require additional horsepower over those encoded with MPEG-2. Mac system guidelines have yet to be published.

Manufacturer

Model

Intel

Pentium Extreme Edition — 955 (3.46 GHz) or higher

Pentium D 900 sequence — 945 (3.4 GHz) or higher

Core Duo — T2500 (2.0 GHz) or higher

Core 2 Duo — E6300 (1.86 GHz) or higher

Core 2 Extreme — X6800 (2.93 GHz) or higher

AMD

Athlon 64 FX — FX-60 (2.6 GHz) or higher

Athlon 64 X2 — 4200+ (2.2 GHz) or higher

Turion 64 X2 — TL-60 (2.0 GHz) or higher

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