Polycom SIP 3.1 Voice Coding Algorithms codecs, Codec Preferences codecPref, These codecs include

Models: SIP 3.1

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Voice Coding Algorithms <codecs/>

Administrator’s Guide SoundPoint IP / SoundStation IP

Voice Coding Algorithms <codecs/>

The following voice codecs are supported:

 

 

 

 

Sample

 

Effective Audio

Algorithm

MIME Type

Label

Bit Rate

Rate

Frame Size

Bandwidth

 

 

 

 

 

 

 

G.711μ-law

PMCU

G711mu

64 Kbps

8 Ksps

10ms - 80ms

3.5 KHz

 

 

 

 

 

 

 

G.711a-law

PCMA

G711A

64 Kbps

8 Ksps

10ms - 80ms

3.5 KHz

 

 

 

 

 

 

 

G.722

G722/8000

G722

64 Kbps

16 Ksps

10ms - 80ms

7 KHz

 

 

 

 

 

 

 

G.722.1

G7221/16000

G7221

16 Kbps,

16 Ksps

20ms - 80ms

7 KHz

 

 

 

24 Kbps,

 

 

 

 

 

 

32 Kbps

 

 

 

 

 

 

 

 

 

 

G.722.1C

G7221/

G7221C

24 Kbps

32 Ksps

20ms - 80ms

14 KHz

 

32000

 

32 Kbps

 

 

 

 

 

 

48 Kbps

 

 

 

 

 

 

 

 

 

 

G.729AB

G729

G729AB

8 Kbps

8 Ksps

10ms - 80ms

3.5 KHz

 

 

 

 

 

 

 

Lin16

L16/16000

L16

25.6 Kbps

16 Ksps

10ms

7 KHz

 

L16/32000

 

51.2 Kbps

32 Ksps

 

14 KHz

 

L16/48000

 

76.8 Kbps

48 Ksps

 

22 KHz

 

 

 

 

 

 

 

Siren14

SIREN14/

SIREN14

24 Kbps

32 Ksps

20ms - 80ms

14 KHz

 

16000

 

32 Kbps

 

 

 

 

 

 

48 Kbps

 

 

 

 

 

 

 

 

 

 

Siren22

SIREN22/

SIREN22

32 Kbps

48 Ksps

20ms - 80ms

22 KHz

 

48000

 

48 Kbps

 

 

 

 

 

 

64 Kbps

 

 

 

 

 

 

 

 

 

 

These codecs include:

Codec Preferences <codecPref/>

Codec Profiles <audioProfile/>

Codec Preferences <codecPref/>

Attribute

Permitted

Default

Interpretation

Values

 

 

 

 

voice.codecPref.G711Mu

Null, 1-3

1

Specifies the codec preferences for

 

 

 

SoundPoint IP 320, 330, 430, 500, 501,

voice.codecPref.G711A

 

2

 

600 and 601 platforms.

 

 

 

voice.codecPref.G729AB

 

3

1 = highest

 

 

 

3 = lowest

 

 

 

Null = do not use

 

 

 

Give each codec a unique priority, this will

 

 

 

dictate the order used in SDP negotiations.

 

 

 

 

A - 38

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Polycom SIP 3.1 manual Voice Coding Algorithms codecs, Codec Preferences codecPref Codec Profiles audioProfile