compression ratio Lexus GX470 2007 Using other driving systems /

210
3-3. Using the rear audio system
■Symbols shown on DVD video discs
■DVD video disc glossary
●DVD video discs: Digital Versatile Discs that hold the world’s standard video.
DVD video discs have adopted “MPEG2”, one of the world st andards of digital
compression technologies. The picture data is compressed by 1 /40 on average
and stored. Variable rate encoding tech nology has been adopted in which the
volume of data assigned to the picture is changed depending on the picture for-
mat. Audio data is stored using PCM and Dolby digital, which enables higher
sound. Furthermore, multi-angle and multi-language features will also help you
enjoy the more advanced technology of DVD video.
Indicates NTSC format.
Indicates the number of audio tracks.
Indicates the number of language subtitles.
Indicates the number of angles.
Indicates the screen display ratios available.
Wide screen: 16:9
Standard: 4:3
Indicates the disc’s region code.
All: all countries
Number: region code