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Discussion Groups | Speech Coding | AMR with RTP
Technical discussions related to Speech Coding (all itu and other vocoders, ACELP, CELP, AMR, etc)
AMR with RTP - Harsha - Feb 8 8:28:00 2002
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Hi All, In RTP payload format for AMR, how is it that the sender side will determine that the frame is severely damaged ? (It is mentioned that if Q bit is not set, then it indicates that the frame is severely damaged and the receiver should set RX_TYPE to SPEECH_BAD or SID_BAD). Will the sender side generate SPEECH_BAD or SID_BAD frames ? Thanks, Harsha |
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Re: AMR with RTP - Vinay M K - Feb 8 13:26:00 2002
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If you refer to the document 36 TS 26.093 version 3.1.0 Release 1999 ( or the later version 4.1.) it clearly specifies that the channel decoder (RX Radio subsystem) sets RX_TYPE appropriately incase of errors and loss of packets.. -Vinay 2/8/2002 1:58:20 PM, "Harsha" <> wrote: >Hi All, > > In RTP payload format for AMR, how is it that the sender side will determine that the frame is severely damaged ? > (It is mentioned that if Q bit is not set, then it indicates that the frame is severely damaged and the receiver should > set RX_TYPE to SPEECH_BAD or SID_BAD). Will the sender side generate SPEECH_BAD or SID_BAD frames ? > >Thanks, >Harsha > >_____________________________________ > -Vinay _________________________________________________________ ">http://mail.yahoo.com |
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Re: AMR with RTP - Harsha - Feb 11 4:47:00 2002
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Thanks Vinay But, I would be interested in knowing how TX_TYPE can be SPEECH_BAD or SID_BAD. It is mentioned in the same specification (6 TS 26.093 version 3.1.0 Release 1999 ( or the later version 4.1.)) that TX_TYPE can be SPEECH_BAD or SID_BAD. And that this can be the case with TFO and TrFO situations. But I could not get any information on how TX_TYPE can be SPEECH_BAD or SID_BAD. Also, in the RTP Payload format for AMR, when is it that the payload is severely damaged ? Could it be a result of some problem in the sampling process ? just a wild guess !! Regards Harsha ----- Original Message ----- From: "Vinay M K" <> To: <> Sent: Friday, February 08, 2002 6:56 PM Subject: Re: [speechcoding] AMR with RTP > If you refer to the document 36 TS 26.093 version 3.1.0 Release 1999 ( or the later version 4.1.) > it clearly specifies that the channel decoder (RX Radio subsystem) sets RX_TYPE appropriately > incase of errors and loss of packets.. > -Vinay > 2/8/2002 1:58:20 PM, "Harsha" <> wrote: > > >Hi All, > > > > In RTP payload format for AMR, how is it that the sender side will determine that the frame is severely damaged ? > > (It is mentioned that if Q bit is not set, then it indicates that the frame is severely damaged and the receiver should > > set RX_TYPE to SPEECH_BAD or SID_BAD). Will the sender side generate SPEECH_BAD or SID_BAD frames ? > > > >Thanks, > >Harsha > > > > > > > > > > > > > >_____________________________________ > > > > > > > > > > > > > > -Vinay > > _________________________________________________________ > ">http://mail.yahoo.com > > > _____________________________________ |
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