Quadrant tech C-1.2D manual Appendix C, Glossary

Appendix C

Glossary

AC-3 (Dolby Digital) – A Dolby Laboratories specification for digital audio. An AC-3 stream contains 5.1 channels of digital audio (full 44.1 kHz, 16-bit digital channels for left, right, center, left surround, right surround, and an additional low bit rate channel for subwoofer information). AC-3 data is normally transferred digitally from a coaxial or optical S/PDIF output connector to an AC-3 decoder or amplifier for playback.

Angle Control – Angle control allows the user playing a DVD title to select which scene is displayed when the DVD content contains multiple angles. This multiple angle content is unique to DVD because previous compression standards did not support the simultaneous compression of more than one video sequence. Multiple angles are a result of filming the original production with more than one camera, and they can be used to assemble “different” versions of the same movie, such as a “Director’s Cut.”

Aspect Ratio – The relationship between the width and height of a video frame (or of a pixel making up a video frame). 4:3 is the standard for NTSC (and therefore televisions in the U.S., which are only somewhat wider than they are high). 16:9, also called “letterbox” is the format used in movie theaters, where the screen is 16-ninths (178%) wider than it is high. Many non-U.S. televisions are built to display this format.

User’s Guide CineMaster 43