HP Vectra VEi8 HP Vectra VEi7, VEi8 & VLi8, Technical Reference Manual (V - Page 25

Core Components and Technologies Mass-Storage Devices Audio features of DVD- A DVD-Video disc can have up to 8 audio tracks (streams). Each track Video 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 6.144 Mbps. DVD Region Codes DVD Regional Locking is a system used to control which DVD movies play on which DVD Players. For example, if the first DVD-Video disc played on a DVD device is from Region 1, the device can subsequently only play DVD-Video discs from that region. The regions are broken down as follows: Regional Codes 1 2 3 4 5 6 Region USA & Canada Europe & Japan South East Asia Latin America & Australia Russia, Rest of Asia, Africa China 25