Sony VGC-LT18E - Manual (Page 47)

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Using Your VAIO Computer
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To play copyright protected Blu-ray Discs continuously, you need to update the AACS key. Note that the AACS key update requires Internet access.
As with other optical media devices, circumstances may limit compatibility or prevent Blu-ray Disc playback. VAIO computers may not support movie
playback on packaged media recorded in AVC or VC1 formats at high bit rates.
Region settings are required for movies and BD-ROM contents. If the region setting on the optical disc drive does not match the region coding on the
disc, playback is not possible.
Unless your external display is compliant with the High-bandwidth Digital Content Protection (HDCP) standard, you cannot play or view the contents
of copyright protected Blu-ray Discs.
Some contents may restrict video output to be standard definition or prohibit analog video output at all. It is strongly recommended that digital HDCP-
compliant environment be implemented for optimum compatibility and viewing quality.