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Terms
OTHERS
525/60
A scan system with 525 horizontal lines and 60 interlacing fields (30 frames) per second.
Applied by NTSC.
ANALOG
A level theoretically changes infinitely in time and space. As compared to DIGITAL.
ANGLE
A specific view of a scene recoded from a specific angle in DVD-Video. When viewing
the specific scenes, different angles can be selected.
CD
Abbreviation for Compact Disc. A laser disc storage format developed by Philips and Sony.
CD-DA
Abbreviation for Compact Disc Digital Audio. The original music CD format storing audio
information as digital PCM data.
CD-R
The extension of the CD format. Data can be recorded once by utilizing coloring matter
subliming technology.
CD-ROM
The extension of the CD-DA format. The computer data is stored in the digital format.
CHAPTER
Sections of a picture or a music piece on a DVD that are smaller than titles. A title is com
posed of several chapters. Each chapter is assigned a chapter number enabling you to locate
the chapter you want.
COMPRESSION
A process which eliminates redundancy of digital data to reduce the necessary storing or
transmitting data size. Lossless compression only eliminates the enough redundancy to
make date restore correctly. Lossy compression sacrifices the additional data to achieve a
larger compression.
CONTRAST
The range between the brightest and the darkest of an image.
DAC Digital-to-analog converter)
A circuit converting the digital data (audio or video) to analog data.
DIGITAL
Expressed by numerals. For example, a computer utilized a group of discrete numeric
values. The analog data can be digitized by sampling.
625/50
A scan system with 625 horizontal lines and 50 interlacing fields (25 frames). Applied by
PAL and SECAM.