Compaq D310 manual Audio features of DVD-Video, DVD Region Codes

System Features
		DVD	CD
	Diameter	120mm	120mm
	Thickness	0.6mm	1.2mm
	Track Pitch	0.74nm	1.6nm
	Minimum Pit Length	0.40nm	0.834nm
	Laser Wavelength	640nm	780nm
	Data Capacity (per layer)	4.7GB	0.68GB
	Layers	1,2,4	1

Audio features of DVD-Video

A DVD-Video disc can have up to 8 audio tracks (streams). Each track can be in one of three formats:

•Dolby Digital (Dolby AC-3): 1 to 5.1 channels

•MPEG-2 audio: 1 to 5.1 or 7.1 channels

•LPCM: 1 to 8 channels.

Dolby Digital is multi-channel digital audio, using lossy AC-3 coding technology from original PCM with a sample rate of 48 kHz at up to 24 bits. The bitrate is 64 kbps to 448 kbps, with 384 being the normal rate for 5.1 channels and 192 being the normal rate for stereo (with or without surround encoding).

MPEG audio is multi-channel digital audio, using lossy compression from original PCM format with sample rate of 48 kHz at 16 bits. Both MPEG-1 and MPEG-2 formats are supported. The variable bitrate is 32 kbps to 912 kbps, with 384 being the normal average rate. MPEG-1 is limited to 384 kbps.

Linear PCM is uncompressed (lossless) digital audio, the same format used on CDs and most studio masters. It can be sampled at 48 or 96 kHz with 16, 20, or 24 bits/sample. (Audio CD is limited to 44.1 kHz at 16 bits.) There can be from 1 to 8 channels. The maximum bitrate is 6.144MBps.

DVD Region Codes

After setting the DVD region (by playing a DVD video for the first time), the DVD region can be changed a further four times; after that the DVD drive will only play DVD videos from the last DVD region that was set.

Regional Codes	Region
1	USA & Canada
2	Europe (excluding former USSR countries), Japan, Near East (including Iran and Egypt), South Africa
3	South East Asia, South Korea
4	Latin America & Oceania (Australia, New Zealand)
5	Africa (excluding Egypt and South Africa), Eastern European countries, Sub-Indian continent
6	China

28 Evo D310 Micro Desktop