LG BH100 Training Manual page 14

OVERVIEW
Dolby Digital (5.1), as well as the competing DTS Digital Surround format, uses discrete channel
information, instead of matrixing, to provide sound for home theater use. The Dolby Digital 5.1 (and
DTS Digital Surround) format carries sound data for 5 surround channels (Left Front, Center, Right
Front, Left Surround, and Right Surround) and one Low Frequency Effects (SubWoofer) channel. All
six channels are carried via digital audio cables to a compatible A/V Receiver or TV. Dolby Digital 5.1
and DTS Digital Surround combine to be the most widely used formats in Home Theaters.
Dolby Digital EX and DTS-ES formats are new processing technologies available in some newer A/V
Receivers that can either decode discrete 6.1/7.1 channels or matrix the additional surround channels
from 5.1, depending on the subset. These extended surround formats create more of a sound envelope
around the listener.
New formats from Dolby Labs and DTS include lossless compression formats as well as high bitrates,
for the next-generation in surround sound. Dolby Digital Plus (DD+) is a high bitrate (up to 6.144
Mbps) 7.1channel format (with additional supports up to 13.1). Dolby TrueHD and DTS-HD Master
Audio, both offer lossless compression as well as high bitrates (up to 18Mbps).
Dolby Digital 5.1 (AC-3) is standard for
DVD, HDTV, and both of the next-gen.
DVD formats, BD and HD DVD. Dolby
Digital Plus, Dolby TrueHD, and DTS-HD
Master Audio are slated for use in both
next-gen. formats; mandatory in HD DVD
Players, and Optional for BD Players.
For more information on any or all of
the Dolby formats, visit Dolby
Laboratories at http://www.dolby.com.
For more information on any or all of
the DTS formats, visit DTS Inc at http:/
/www.dts.com.
The Blu-ray Disc format consists of four
basic disc types; BD-ROM – a prerecorded
"stamped" disc, BD-R – a write once
inorganic dye disc similar to DVD±R, BD-RE – a rewritable phase-change disc similar to DVD±RW, and
BD Hybrid – an experimental dual-format disc with BD-ROM format on one side and DVD on the other.
Since the BD-Hybrid format is not in use and is essentially a BD-ROM disc, most discussion will be
about 3 BD disc formats.
The BD format can be applied in one of three applications; ROM – data storage and distribution such
as software and PC data, BD-ROM A/V – prerecorded data consisting of audio and video information
using in the form of a movie similar to the DVD-Video application, and BD-R/RE AV – an user recorded
format of audio and video data similar to DVD±R/RW usage in DVD Recorders. The first generation
product discussed in this manual provides support for only the BD-ROM AV application. Therefore the
BD technology discussed in this manual will primarily be that of the BD-ROM AV application.
The increase in disc capacity achieved by Blu-ray disc technology over DVD technology is due primarily
to three factors. The most obvious reason for increased capacity is that the laser bean provides a
smaller dot area to read from and in turn allows for smaller portions of data, allowing for more data
on a disc. While this is a somewhat simplistic view of the technology, there are some finer aspects of
BH100 Blu-ray Player
BD-ROM AV Primary Audio Stream
LPCM Dolby
Digital
Max. bitrate (Mbps) 27.748 0.64
Compression type CBR CBR
Max. no. channels 8 ( ) 5.1
48KHz, 96KHz
6 ( )
192KHz
Bits/sample 16, 20, 24 16-24
Sampling freq (KHz) 48, 96, 192 48
Max. no. streams 32 32
LPCM – Linear Pulse Code Modulation CBR – Constant Bit Rate
Dolby Digital – AC-3 VBR – Variable Bit Rate
Dolby Digital Plus – DD+ LBR – Low Bit Rate
Dolby Lossless – Superset of Dolby TrueHD
DTS Digital Surround – DTS
DTS-HD Master Audio – DTS++ / DTS-HD
14
Dolby Dolby DTS DTS-HD
Digital Lossless Digital Master
Plus Surround Audio
4.736 18.64 1.524 24.5
VBR VBR CBR VBR
7.1 8 ( ) 5.1 8 (
48KHz, 96KHz 48KHz, 96KHz
6 ( ) 6 (
192KHz 192KHz
16-24 16-24 16, 20, 24 16-24
48 48, 96, 192 48 48, 96, 192
32 32 32 32
BD-ROM AV Secondary Audio Stream
Dolby DTS-HD Master
Digital Plus Audio LBR
Max. bitrate (Kbps) 256 256
Max. no. channels 5.1 5.1
Bits/sample 16-24 16-24
Sampling freq. (KHz) 48 48
Overview
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