Dvd, Css | Dolby Laboratories S99 specification

Appendix (Definition of Keywords)

Angle

Recorded onto some DVD discs are scenes which have been simultaneously shot from a number of different angles (the same scene is shot from the front, from the left side, from the right side, etc.) With such discs, the ANGLE button can be used to view the scene from different angles.

Chapter number

These numbers are recorded on DVD discs. A title is subdi- vided into many sections, each of which is numbered, and specific parts of video presentations can be searched quickly by using these numbers.

DVD

This refers to a high-density optical disc on which high-quality pictures and sound have been recorded by means of digital signals. Incorporating a new video compression technology (MPEG II) and high-density recording technology, DVD enables aesthetically pleasing full-motion video to be recorded over long periods of time (for instance, a whole movie can be recorded.) DVD has a structure consisting of two 0.6mm thin discs that are adhered to each other. Since the thinner the disc, the higher the density at which the information can be recorded, a DVD disc has a greater capacity than a single 1.2mm thick disc. Since the two thin discs are adhered to each other, there is the potential to achieve double-sided play sometime in the future for even longer duration play.

Subtitle

These are the printed lines appearing at the bottom of the screen that translate or transcribe the dialogue. They are recorded on DVD discs.

Time number

This indicates the playing time that has elapsed from the start of a disc or a title. It can be used to find a specific scene quickly. (It may not work with some discs.)

Title number

These numbers are recorded on DVD discs. When a disc contains two or more movies, these movies are numbered as title1, title2, etc.

CSS

CSS stands for "Content Scramble System". It is the data scram- bling method used to garble the content of a DVD disc. Ac- cording to most sources, CSS was put into use for the pur- pose of ensuring that copyrighted material placed in this for- mat would only be usable with licensed DVD playback mechanisms.

Dolby Digital

Dolby Digital is an advanced form of digital audio coding that makes it possible to store and transmit high-quality digital sound far more efficiently than was previously possible. First used in movied theaters in 1992, it is the result of decades spent by Dolby Laboratories developing signal-processing systems that exploit the characteristics of human hearing.

Dolby Digital 2 Channel

At the option of their producers, Dolby Digital programs can deliver surround sound with two discrete range channels- left and right .