Dolby Laboratories DP569 User Manual
Page 68
Model DP569 User’s Manual
Metadata
A–10
It is important to consider the output signals from each piece of equipment that can
receive a Dolby Digital program in the home. Table A-2 shows the output types from
different equipment.
Table A-2 Outputs from Various Dolby Digital Signal Processing Equipment
Output
Equipment
Digital 5.1-Channel
Analog
Two-Channel
Analog
RF
Remodulated
5.1-channel amplifier
Standard home theater A/V amp
r
r
5.1-channel decoder
r
r
High-end DVD player
r
r
r
DVD player
r
r
PC
Includes games consoles
r
(some units)
r
High-end set-top box
Often HDTV
r
r
r
r
Set-top box
Usually SDTV
r
r
r
IDTV
TV set with integrated digital TV tuner
r
r
High-end TV
Large screen TV with 5.1-channel
speaker system
r
r
Set-top boxes, used for the reception of terrestrial, cable, or satellite Digital
Television, typically offer an analog mono signal modulated on the RF/Antenna
output, a line-level analog stereo signal, and an optical or coaxial digital output. DVD
players offer an analog stereo and a digital output, and some offer a six-channel
analog output (for a 5.1-channel presentation). Portable DVD players offer analog
stereo, headphone, and digital outputs. DVD players in computers and game consoles
offer a digital output as well as analog stereo, headphone, and possibly six-channel
analog outputs. 5.1-channel amplifiers, decoders and receivers have six-channel
analog outputs and possibly six speaker-level outputs.
In all of these cases, a Dolby Digital decoder creates the analog audio output signal.
In the case of the set-top box or DVD player, the analog stereo output is a
downmixed version of the Dolby Digital data stream. The digital output delivers the
Dolby Digital data stream to either a downstream decoder or a Dolby Digital
capable integrated amplifier.
In each of these devices, the analog stereo output is one of two different stereo
downmixes. One type is a stereo-compatible Dolby Surround downmix (also called
Pro Logic, left-total/right-total, or Lt/Rt) of the multichannel source program that is
suitable for Dolby Surround Pro Logic decoding. The other type is a simple stereo
representation (called a left-only/right-only, or Lo/Ro) suitable for playback on a