NTi Audio Digirator DR2 - Manual (Page 38)

Dolby / DTS Signals
38
6. Dolby / DTS Signals
Signal generation
Dolby and DTS signals are compressed, multi-channel audio
signals. They are transmitted as non-linear PCM signals and
need to be processed by a Dolby / DTAS decoder before they
can be used as multi-channel audio.
The available test signals have been externally encoded and are
implemented as WAV files.
All DOLBY and DTS signals stored in the
DR2 have been encoded and recorded on
DOLBY and DTS certified equipment.
The sampling frequency is fixed to 48 kHz
and may by synchronized to an external
reference of 48 kHz within ±100 ppm
accuracy.
The wave files are stored in the sub directories DOLBY and DTS.
All files stored in these folders are treated as „Non-Linear PCM“
signals and the channel status is automatically marked accord-
ingly.
DR2 internal signal flow for Dolby / DTS test signals
Digital Audio
Transmitter
Sample Rate
Converter
Digital Audio
Receiver
Signal
Generator
Analyzer
fs = 48 kHz
32.0 kHz
44.1 kHz (*2 , *4)
48.0 kHz (*2 , *4)
INT
EXT
Video (PAL, NTSC)
Word Clock
AES3, DARS
Digital Audio
Transmitter
Sample Rate
Converter
Digital Audio
Receiver
Signal
Generator
Analyzer
fs = 48 kHz
32.0 kHz
44.1 kHz (*2 , *4)
48.0 kHz (*2 , *4)
INT
EXT
Video (PAL, NTSC)
Word Clock
AES3, DARS
Digital Audio
Transmitter
Sample Rate
Converter
Digital Audio
Receiver
Signal
Generator
Analyzer
fs = 48 kHz
32.0 kHz
44.1 kHz
(*2 , *4)
48.0 kHz (*2 , *4)
INT
EXT
Video (PAL, NTSC)
Word Clock
AES3, DARS
Digital Audio
Transmitter
Sample Rate
Converter
Digital Audio
Receiver
Signal
Generator
Analyzer
fs = 48 kHz
32.0 kHz
44.1 kHz (*2 , *4)
48.0 kHz (*2 , *4)
INT
EXT
Video (PAL, NTSC)
Word Clock
AES3, DARS
fs = 20 - 216 kHz
fs = 20 - 216 kHz fs ≈ 32 - 48 kHz
fs = ~ 48 kHz fs ≈ 48 kHz
Audio signal
Clock signal
not active