g.729.1 RTP static load format rfc4749

g.729.1 RTP Static load format

g729

IT provides a standardized solution for packetized voice applications This allows a smooth transition from narrowband to W Ideband Telephony.

Sample rate 16khz,1 Frame 20 milliseconds, so the sample has 320 per packet

Static charge head format

0 1 2 3

0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

|   MBS |                                               FT | |

+-+-+-+-+-+-+-+-+                                               +

: zero or more frames at the same bit rate:

:                                                               :

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

MBS (maximum bit rate supported), that is, the sender describes the maximum rates that it supports, and the other party receives the package to

At any time to send a static charge below this rate. If there is a subsequent MBS declaration, replace the previous MBS value.

+-------+--------------+

| MBS | Max bit Rate |

+-------+--------------+

|    0 | 8 Kbps |

|    1 | Kbps |

|    2 | Kbps |

|    3 | Kbps |

|    4 | Kbps |

|    5 | Kbps |

|    6 | Kbps |

|    7 | Kbps |

|    8 | Kbps |

|    9 | -Kbps |

|    10 | Kbps |

|    11 | Kbps |

|  12-14 | (Reserved) |

|    15 | No_mbs |

+-------+--------------+

The FT (frame type) values the same table, which describes the rate type of the current frame.

Out-of-band signaling

Key parameters

Maxbitrate, the maximum rate limit for the current RTP entire session, go to values as in table 8000, 12000, 14000, 16000, 18000,

20000, 22000, 24000, 26000, 28000, 30000, and 32000, which means that the value of MBS is less than this value. With no default

The value is 32000.

MBS, the maximum rate at which the current recipient supports receiving. Without this parameter, the value is maxbitrate.

Ptime,maxptim (rfc4566)