248 Gateway and Gateway 4 Manual v1.2
© Tieline Research Pty. Ltd. 2021
the connection you are setting up. Please see the following table for details on the connection
requirements of the different algorithms available.
IP over-
head per
connectio
n
Audio Quality and
Features
Recommended
applications for on-air
use
Linear/PCM
(Uncom-
pressed)
sample rate x
bits per
sample x no.
channels;
512kbps
minimum
(16bit;32kHz)
to 4.6 Mbps
(24bit; 96
kHz)
· Full bandwidth,
perfect audio
quality for voice
and music
· No error
concealment/corr
ection or artifacts
· Extremely high quality
PCM linear
uncompressed audio
for STLs and audio
distribution.
· Ideal for fiber or high
bandw idth links.
· High quality voice
and music
· Very low delay
at low bit rates
· Great for live voice or
music remotes as w ell
as STLs and audio
distribution with limited
connection bandw idth
(e.g. POTS or 3G
w ireless)
· Suitable w hen
bidirectional
communication
between announcers
is required
· Deliver 15kHz stereo
over 1 x 64kbps ISDN
B Channel.
48 kbps
minimum
(Optimized
for 64kbps
per audio
channel)
· Very high quality
voice and music
· Very low delay
at low to
moderate bit-
rates
· Very high quality, very
low delay STLs and
audio distribution
· Remote connections
able to achieve
48kbps for each audio
channel
· Suitable w hen
bidirectional
communication
between announcers
is required
· Low quality 3kHz
POTS phone
quality audio
· Very low delay
at moderate bit
rates
· Highly compatible w ith
other brands of audio
codec
· Low quality and used
generally for
compatibility
· Good quality
7kHz voice
· Better quality
than a standard
POTS phone call
· Very low delay
at moderate bit
rates
· Highly compatible w ith
other brands of audio
codec
· Good voice quality
audio for remotes and
other voice quality
applications
· Very high quality
voice and music
· Low to moderate
delay at
· Highly compatible w ith
other brands of audio
codec
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