[Speex-dev] what is "Mode"?
messaging bay
support at messagingbay.com
Mon Apr 12 19:32:36 PDT 2010
Hi
What is the "Mode"? Should I set it in program for setting the bit rate and quality? Or I only need to set the quality?
At the bottom of the following page:
http://www.speex.org/docs/manual/speex-manual/node10.html
In Table 4: Quality versus bit-rate:
Mode Quality Bit-rate (bps) mflops Quality/description
0 - 250 0 No transmission (DTX)
1 0 2,150 6 Vocoder (mostly for comfort noise)
2 2 5,950 9 Very noticeable artifacts/noise, good intelligibility
3 3-4 8,000 10 Artifacts/noise sometimes noticeable
4 5-6 11,000 14 Artifacts usually noticeable only with headphones
5 7-8 15,000 11 Need good headphones to tell the difference
6 9 18,200 17.5 Hard to tell the difference even with good headphones
7 10 24,600 14.5 Completely transparent for voice, good quality music
8 1 3,950 10.5 Very noticeable artifacts/noise, good intelligibility
9 - - - reserved
10 - - - reserved
11 - - - reserved
12 - - - reserved
13 - - - Application-defined, interpreted by callback or skipped
14 - - - Speex in-band signaling
15 - - - Terminator code
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