Fwd: Additional 5 ms look-ahead delay in AMR12.2k | Speech Coding

Technical discussions related to Speech Coding (all itu and other vocoders, ACELP, CELP, AMR, etc)

Please refer to the document 3G TS 26.090 version 3.1.0 Release 1999 on Page 19. While for MR122 80 samples fdrom the previous frame is used for other modes 40 samples each from the adjacent frames are used for LP analysis. I hopethat answers your query. regards Vinay ------- Start of forwarded message ------- From: manoj garg <> To: Subject: [speechcoding] Additional 5 ms look-ahead delay in AMR12.2k Date: 3/7/2002 11:24:49 AM Dear friends, i am working on EFR compatible AMR. In one of the documents presented at 3gpp meeting by Ericsson i find the following statement: "AMR 12.2 has 5 ms longer delay than GSM EFR which is caused by the (dummy) look-ahead of 5 ms (added to allow seamless frame-wise mode switching with the rest of the AMR modes)" I am not finding that how and where this delay is introduced in AMR 12.2k implementation. i am not also finding any reference to this look-ahead delay in standard AMR documents. Could you please help me by giving me some reference. Thanks, yours sincerely, manoj _____________________________________ -------- End of forwarded message -------- -Vinay

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Discussion Groups | Speech Coding | Fwd: Additional 5 ms look-ahead delay in AMR12.2k

Fwd: Additional 5 ms look-ahead delay in AMR12.2k - Vinay M K - Mar 8 2:16:00 2002