Telos Zephyr Xstream - Manual (Page 138)

USER’S MANUAL
Section 6: AUDIO CODING REFERENCE 126
6.2 Choosing the Best Coding Mode for Your Application
The following chart summarizes and compares a number of important parameters for the coding
modes offered in the Zephyr Xstream.
AAC AAC-LD Layer-3 Layer-2 G.722
Algorithm Type:
Perceptual +
Huffman +
Temporal noise
shaping +
Backwards
adaptive Linear
prediction. Perceptual +
Huffman +
Temporal noise
shaping +
Backwards
adaptive Linear
prediction. Perceptual +
Huffman Perceptual ADPCM
Audio Freq Response (+0/-1 dB):
Mono (56 or 64kbps) &
Discrete Stereo (112 or 128kbps):
Sample Rate:
16 kHz -- -- -- -- 7.5 kHz
24kHz --
-- -- 8.6 kHz --
32 kHz 15 kHz 14 kHz 15 kHz *7.8/9.8 kHz --
48 kHz 20 kHz 14 kHz 16 kHz *7.8/9.8 kHz --
Joint Stereo (112 or 128kbps):
Sample Rate:
--
32 kHz 15 kHz 14 kHz 15 kHz 15 kHz --
48 kHz 20 kHz 14 kHz 16 kHz 20 kHz --
Stereo (56 or 64kbps)
Sample Rate
32 kHz SR
7 kHz -- -- -- --
48 kHz 10 kHz
Mono (112 or 128 kbps)
Sample Rate:
32 kHz 15.8 kHz 15.8 kHz 14.8 kHz 14.8 kHz --
48 kHz 19.8 kHz 15.8 kHz 21.8 kHz 18.8 kHz --