S P E E C H   C O M P R E S S I O N  D E M O N S T R A T I O N

Note: Files sizes shown below represent actual file sizes of compressed Speech *.wav files. All audio files (except TS 8.5) have been formatted as 8khz PCM.wav files to facilitate comparision of quality without requiring special decoding software. For samples below 4.1kbps, please contact support@instantglobe.com.
 
Samples
PCM
original
(1:1)		 8.5kbps
(15:1)		 G.723.1
6.3kbps
(20:1)		 G.723.1
5.3kbps
(24:1)		 4.8kbps
(27:1)		 4.1kbps
(30:1)
Female voice - automated tour guide
692.2 KB
46.3 KB
34.6 KB
28.8 KB
25.6 KB
23.1 KB
Male voice - doctor's report
295.0 KB
19.7 KB
14.7 KB
12.3 KB
10.9 KB
9.8 KB
Child's voice - talking encyclopedia of birds in education software
850.0 KB
56.7 KB
42.5 KB
35.4 KB
31.5 KB
28.3 KB
Multiple talkers - engineering design discussion in teleconference and SVD applications
493.3 KB
32.9 KB
24.7 KB
20.6 KB
18.3 KB
16.4 KB
Multiple talkers - business deal disagreement in conference call applications
765.7 KB
51.0 KB
38.3 KB
31.9 KB
28.4 KB
25.5 KB
Male voice - (with noise) police report of a freeway accident
655.4 KB
43.7 KB
32.8 KB
27.3 KB
24.3 KB
21.8 KB
Female voice - (with noise) voice mail message with office background noise
342.1 KB
22.8 KB
17.1 KB
14.3 KB
12.7 KB
11.4 KB
Male voice - (with noise) voice mail message with office background noise
313.4 KB
20.9 KB
15.7 KB
13.1 KB
11.6 KB
10.4 KB
Male slow talker - commodities future prices on radio
1,108.0 KB
73.9 KB
55.4 KB
46.2 KB
41.0 KB
36.9 KB
Female fast talker - stock price report on radio
454.7 KB
30.3 KB
22.7 KB
18.9 KB
16.8 KB
15.2 KB
Male fast talker - stock price report on radio
458.8 KB
30.6 KB
22.9 KB
19.1 KB
17.0 KB
15.3 KB