Tieline Merlin PLUS User Manual page 151

ELD down to 24kbps.
Overview of aptX Enhanced Audio Coding
aptX® Enhanced audio coding is used by thousands of radio stations to deliver very low delay audio
for IP broadcasts and is ideal for high quality studio-to-transmitter links and audio distribution. It
delivers outstanding audio quality with exceptionally low delay across a range of IP networks.
32kHz or 48kHz sample rates are available at either 16 bit or 24 bits per sample. aptX Enhanced
has a minimum connection bit rate of 128kbps per channel and offers 10Hz to 24kHz frequency
response. 24 bit, 48kHz aptX Enhanced at the maximum bit rate of 576kbps delivers >120dB of
dynamic range.
aptX® Enhanced is supported over ISDN at the following sample and bit rates:
Encoding
aptX® Enhanced Mono 16 bit, 32 kHz
aptX® Enhanced Mono 16 bit, 48 kHz
aptX® Enhanced Mono 24 bit, 32 kHz
aptX® Enhanced Stereo 16 bit, 32 kHz
Overview of Opus Algorithm
Opus is a highly versatile open source audio coding algorithm. It incorporates technology from the
well-known SILK and CELT codecs to create a low latency speech and audio codec. It is a variable
bit rate algorithm ideal for live broadcast situations because of its capacity to deliver high quality,
real-time Audio over IP (AoIP) at low bit rates. Visit
There are three Opus algorithm configurations available:
Algorithm
Opus Voice
Opus Mono
Opus Stereo
Programming an Algorithm into the Codec
1. Press the HOME
2. Use the navigation buttons on the front panel to select Connect and press the
3. Select IP and press the
4. Select your preferred IP Mode and press the
5. Use the down
6. Navigate to Alg and press
7. Navigate to Manual to configure all settings manually, or Profile to choose a pre-configured
algorithm profile, then press
How do I Choose an algorithm?
The algorithm you select will not only affect the quality of the broadcast but it will also contribute to
the amount of latency or delay introduced. For example, if MP2
delays will be much longer than when using Tieline Music or MusicPLUS algorithms. This is due to
the additional inherent encoding delays involved when using MP2 algorithms. This can be a major
© Tieline Pty. Ltd. 2014
Recommended connection for on-air use
High quality low bit rate remotes (9.6kbps -64kbps)
Very high quality mono remotes, STLs and audio distribution (48kbps -128kbps)
Very high quality stereo remotes, STLs and audio distribution (64kbps -256kbps)
button to return to the Home screen.
button.
navigation button to select Setup and press the
.
.
Merlin PLUS Manual v1.2
Bit rate Required
128 kbps
192 kbps
192 kbps
256 kbps
http://www.opus-codec.org
button.
B Channels Required
2
3
3
4
for more info.
button.
button.
algorithms are used, program
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