A=rtpmap:13 CN/8000 - Descriptions

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rtpmap lines

Now we come to thertpmaplines for the formats included in the “m” lines above to map the payload types and the codecs. We also have a number of the fmtp lines to describe characteristics of the offered codecs. The order in which the formats are written in the media line is important as it defines the priority in which the browsers would like to use them.

a=rtpmap:107 CN/48000

a=rtpmap:106 CN/32000

a=rtpmap:105 CN/16000

a=rtpmap:13 CN/8000

The dynamic RTP payload types above (except payload type 13 which is static) indicate that Comfort Noise–CN– is going to be used for codecs of rates48000, 32000,16000and8000kbits/s.

Tag » Codec Cn/8000