Codec Tieline Gateway User Manual page 249

MPEG Layer 3
LC-AAC
HE-AAC v.1
HE-AAC v.2
AAC-LD
AAC-ELD
AAC-ELDv.2
© Tieline Research Pty. Ltd. 2021
Up to 100ms 64kbps
15kHz
Up to 64ms 64kbps
15kHz
Up to 128ms 48kbps
15kHz
Up to 128ms Minimum
15kHz 16kbps
(Mono);
24kbps
(stereo)
Up to 20ms at 48kbps
20kHz 48kHz minimum
Up to 15-30ms 24 kbps
20kHz minimum
Up to 35ms Pending
20kHz release
Gateway and Gateway 4 Manual v1.2
moderate to high
bit rates
8.5 - · High quality voice
13.3kbps and music
· Moderate bit
rates
· High delay
15kbps · High quality voice
and music at
low est bit rate;
better quality at
higher bit rates
· Moderate delay
at moderate to
high bit rates
7.4kbps · High quality voice
and music at the
low est bit rate;
better quality at
higher bit rates
· Low to Moderate
bit rates
· High delay
7.4kbps · High quality voice
and music
· Low bit rates
· High delay
30kbps · Very high quality
voice and music
· Very low delay
at low to
moderate bit
rates
15-30kbps · Very high quality
voice and music
· Very low delay
at low bit rates
Pending · High quality voice
release and music
· Low delay at low
bit rates
249
· Very high quality audio
for remotes, STLs and
audio distribution
· High quality remotes,
STLs and audio
distribution
· Use w hen bidirectional
communication
betw een announcers
is not required
· Voice or music
remotes as w ell as
STLs and audio
distribution w here
some delay is tolerable
· Tieline Music or
MusicPLUS deliver
low er delay
· Live voice or music
remotes as w ell as
STLs and audio
distribution w ith limited
connection bandw idth
· Use w hen bidirectional
communication
betw een announcers
is not required
· Used for DAB+ radio
streaming
· Ideal for low bit rate
remotes
· Use w hen bidirectional
communication
betw een announcers
is not required
· Very high quality, very
low delay STLs and
audio distribution
· Remote connections
able to achieve
48kbps for each audio
channel requiring
· Suitable w hen
bidirectional
communication
betw een announcers
is required
· Great for live voice or
music remotes
· Suitable w hen
bidirectional
communication
betw een announcers
is required
· Great for live voice or
music remotes w here
limited connection
bandw idth is available
· Suitable w hen
bidirectional
communication
betw een announcers
is required