AMR Encoder / Decoder

Product Overview

AMR (Adaptive Multi Rate) is a speech codec established by 3GPP (3rd Generation Partnership Project) and has the feature that the bit rate can be switched frame by frame. It can be used for the various applications such as mobile handset, PDAs, and network distribution services.
TMC has developed and commercialized the software IP that aims at high speed by efficient numerical calculation.

Model Numbers

  • Encoder: TM1345
  • Decoder: TM1346

Features

  • High speed by efficient numerical calculation.
  • High portability by the optimization with the standard C code.
  • Optimized for various processors (ARM, MIPS, SH, DSP, etc.).

Specification

Encoder
Input Format PCM (13 bits, 8kHz sampling, Monaural )
Output Format AMR MIME file storage format, AMR interface format 2(IF2)
Bitrate 4.75,6.70,12.2 kbps
Frame Type SPEECH_GOOD, NO_DATA, SID_FIRST, SID_UPDATE
Decoder
Input Format AMR MIME file storage format, AMR interface format(IF2)
Output Format PCM (13 bits, 8kHz sampling, Monaural)
Bitrate 4.75, 5.15, 5.90, 6.70, 7.40, 7.95, 10.2, 12.2 kbps
Frame Type SPEECH_GOOD,SPEECH_BAD,SID_FIRST, SID_UPDATE, SPEECH_BAD, SID_BAD