Glossary
Video information■Component video signal
With the component video signal system, the video signal is separated into the Y signal for the luminance and the PB and PR signals for the chrominance. Color can be reproduced more faithfully with this system because each of these signals is independent. The component signal is also called the “color difference signal” because the luminance signal is subtracted from the color signal.
■NTSC (National Television System
Committee)
NTSC is a video signal system (525 lines, 30 frames per second) used in North America, Central America, a number of South American countries, and some Asian countries, including Japan.
■PAL (Phase Alternating Line)
PAL is a video signal system (625 lines, 25 frames per second) used in the United Kingdom, much of the rest of western Europe, several South American countries, some Middle East and Asian countries, several African countries, Australia, New Zealand, and other Pacific island countries.
■Pan & Scan and Letterbox
In general, DVD Video is produced for viewing on a wide television screen with an aspect ratio of 16:9. This means you can now view most material with the intended aspect ratio on a
This ratio will not fit on a standard television that has an aspect ratio of 4:3. Two picture styles, Pan & Scan and Letterbox, deal with this problem.
•Pan & Scan cuts off the left and right portions of the picture to fill the screen.
•Letterbox inserts black bands at the top and bottom of the picture to reproduce an aspect ratio of 16:9.
■Progressive scan
A method of displaying all scanning lines in a frame at once, reducing flicker noticeable on a larger screen and creating a sharp and smooth image.
■Title, Chapter (DVD Video)
DVD video lets you divide a disc in a big way by titles or a small way by chapters. Each division is either called a title number or a chapter number.
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