Codec
name
Enc / Dec
Number
of test
iterations
Bytes processed
Milliseconds
Bytes output
N
5
G.723
enc
350 11256000
7270
562800
97
G.723
dec
500 20040000
2657
40080000
943
G.726 enc 120
3859200
6099 964800
40
G.726 dec 60
1200000
7191 4800000
42
G.729 enc 350
11256000 6047 703500
117
G.729 dec 850
4250000
7220 68000000
588
Copyright © Odin TeleSystems Inc, 2010
www.odints.com
Table 2 Synthetic testing results of encoding / decoding operations
Codec
name
Enc / Dec
Number of
connections
DSP Load
%
DSP Load
per channel
ARM Load
%
ARM Load
per channel
G.711 -
30
10
1.63 28-30 1.9
G.723
enc 35
57 0.43 65-70 1.37
G.723 dec
35
15
3.2
45-50
2.0
G.726
enc 20
64 2.55 38-40 2.15
G.726 dec
20
51
1.53
40-45
1.73
G.729
enc 30
46 0.73
52
1.6
G.729 dec
30
22
0.53
50-55
2.43
Table 3 Overall testing results with account of incoming and outgoing RTP connections and jitter
6
The Alvis powered by the RTP Bridge can successfully offload x86 servers increasing
the compactness of solution. This makes possible to create low power-consumption
devices as a breeze. (See Table 4)
Codec
name
Number of
encoding
channels
Number of
decoding
channels
G.723 63
318
G.726 32
39
G.729 63
188
Table 4 Number of encoding / decoding channels
5
The number of voice channels that can handle the codec.
6
The testing was performed with 20ms RTP packets stream.
