Manual

59
Algorithm Comparison Chart for ACCESS NX
Required
Bitrate
Coding
Delay
Audio
Bandwidth
AAC: Provides near transparent audio at relavely high data rates. Best used on non-constrained
data networks - for situaon where latency is not important.
64 kb/s 69 ms 20 kHz D1 Mono
96 kb/s 69 ms 20 kHz D2 Stereo
128 kb/s 69 ms 20 kHz D3 Dual Mono allows independent programming to be sent on both L&R channels
128 kb/s 69 ms 20 kHz D4 Stereo 128Kb
256 kb/s 69 ms 20 kHz D5 Dual Mono 256Kb allows independent programming to be sent on both L&R channels
56 kb/s 69 ms 20 kHz D6 Mono 56Kb
96 kb/s 69 ms 20 kHz D7 Mono 96Kb
160 kb/s 69 ms 20 kHz D8 Stereo 160Kb
HE-AAC: Provides near transparent audio at low data rates - for situaons where latency is not
important.
48 kb/s 146 ms 20 kHz E1 Mono
64 kb/s 146 ms 20 kHz E2 Stereo
96 kb/s 146 ms 20 kHz E3 Dual Mono allows independent programming to be sent on both L&R channels
Linear PCM: Delivers transparent audio with no compression and very low delay - for use on high
throughput networks.
768 kb/s 19 ms 20 kHz F1 Mono
1536 kb/s 19 ms 20 kHz F2 Dual Mono
512 kb/s 19 ms 15 kHz F3 Mono
1024 kb/s 19 ms 15 kHz F4 Dual Mono
HE-AAC V2: Provides medium quality HE-AAC implementaon using Spectral Band Replicaon.
18 kb/s 212 ms 12 kHz G1 Mono 18Kb
24 kb/s 269 ms 12 kHz G2 Stereo 24Kb adds Parametric Stereo to SBR for higher quality audio at low data rate
32 kb/s 184 ms 20 kHz G4 Stereo 32Kb adds Parametric Stereo to SBR for higher quality audio at low data rate
48 kb/s 184 ms 20 kHz G3 Stereo 48Kb adds Parametric Stereo to SBR for higher quality audio at low data rate
56 kb/s 184 ms 20 kHz G5 Stereo 56Kb adds Parametric Stereo to SBR for higher quality audio at low data rate
AAC-LD: Requires higher data rates but provides near transparent voice or music with low delay.
96 kb/s 30 ms 20 kHz I1 Mono
128 kb/s 30 ms 20 kHz I2 Stereo
192 kb/s 30 ms 20 kHz I3 Dual Mono allows independent programming to be sent on both L&R channels
256 kb/s 30 ms 20 kHz I4 Stereo 256Kb
128 kb/s 30 ms 20 kHz I6 Mono 128Kb
64 kb/s 30 ms 20 kHz I7 Mono 64Kb
AAC-ELD: combines the aspects of HE-AAC and AAC-LD to provide low delay, good audio quality and
low bitrate. The best choice for low delay applicaons on the Internet.
48 kb/s 47 ms 20 kHz J1 Mono
64 kb/s 46 ms 20 kHz J2 Stereo
96 kb/s 47 ms 20 kHz J3 Dual Mono allows independent programming to be sent on both L&R channels
24 kb/s 47 ms 20 kHz J4 Mono 24Kb
FLAC: Free Lossless Audio Compression provides transparent audio while conserving bandwidth.
FLAC bitrate is variable and based on audio input.
~537 kb/s 26 ms 20 kHz K1 Mono
~1075 kb/s 26 ms 20 kHz K2 Dual Mono
~358 kb/s 26 ms 15 kHz K3 Mono
~717 kb/s 26 ms 15 kHz K4 Dual Mono
Opus: A newer oering that combines low delay and low network ulizaon. Opus is included
primarily for compability with sophone apps and Internet connecons using WebRTC. (Special
CBR modes are oered for compability with Tieline products - avoid these in other applicaons).
48Kb/s 41 ms 20 kHz N4.1 Mono 48kbps
56Kb/s 41 ms 20 kHz N4.2 Mono 56kbps
64Kb/s 41 ms 20 kHz N4.3 Mono 64kbps
64Kb/s 41 ms 20 kHz N5.1 Stereo 64kbps
96Kb/s 41 ms 20 kHz N5.2 Stereo 96kbps
128Kb/s 41 ms 20 kHz N5.3 Stereo 128kbps
48Kb/s 41 ms 20 kHz N6.1 CBR Mono 48kbps
64Kb/s 41 ms 20 kHz N6.3 CBR Mono 64kbps
64Kb/s 41 ms 20 kHz N7.1 CBR Stereo 64kbps
96Kb/s 41 ms 20 kHz N7.2 CBR Stereo 96kbps
128Kb/s 41 ms 20 kHz N7.3 CBR Stereo 128kbps
VoIP: G.722 coding algorithm for compability with SIP-style VoIP phones.
64 kb/s 35 ms 7 kHz X3 G.722
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