GSM Full Rate Coder

Vocoders by Adaptive Digital

ADT GSM FR SPEECH CODER C64x, C64x+
  Preliminary C54x C55x

DESCRIPTION

The Adaptive Digital Technologies GSM FR vocoder is a real-time implementation of GSM 06.10 RPELTP (Regular Pulse Excitation-Long Term-Prediction-Linear Predictive Coder) vocoder. GSM FR was the first digital speech-coding standard used in GSM digital mobile phone system.

Coding Rate: 13.2 kbps

Sampling Rate: 8 kHz
Data sheet: .pdf

FEATURES

  1. Functions are C-callable.

  2. Multi -Channel Implementation.

  3. Completely re-entrant (Channel can interrupt any Channel, any time)

  4. Can be integrated with echo cancellers, VOX and tone detection/regeneration.

AVAILABILITY

ADT GSM FR is available on the TMS320C64X™ DSP Family .pdf
C64x™DSP, & C64x+™DSP Generation

‘C55x and ‘C54x are preliminary

GSM AMR

SPECIFICATIONS

Note: All CPU usage given in MIPS (also known as MCPS or MHz)


GSM FR C64x/64x+

All Memory usage is given in units of byte.

Function C64x C64x+ C64x Program Mem C64x+ Program Mem Data Mem Per-channel Data Mem Scratch Mem
Encode 2.1 1.9 30880 26096 408 688 740
Decode 3.1 3.1 560 640
Encode/Decode 5.2 5.0 -- -- -- -- --
Last update: 01/06/2008

GSM FR C55x - preliminary

Preliminary - All Memory usage is given in units of byte.

Function C55x MIPS Program Mem Data Mem Per-channel Data Mem Scratch Mem
Encode 8.7 10293 408 677 740
Decode 8.7 560 640
Encode/Decode 17.4 -- -- -- --
Last update: 11/14/2006

GSM FR C54x - preliminary

Preliminary - All Memory usage is given in units of 16-bit word.

Function C55x MIPS Program Mem Data Mem Per-channel Data Mem Scratch Mem
Encode 8.7 5147 204 344 370
Decode 8.7 280 320
Encode/Decode 17.4 -- -- -- --
Last update: 11/14/2006

FUNCTION

FR_ADT_encInit (…) Initializes the GSM FR Encode Channel Structure

FR_ADT_decInit (…) Initializes the GSM FR Decode Channel Structure

FR_ADT_encode (…) Executes the GSM FR encoder

FR_ADT_decode (…) Executes the GSM FR decoder

APPLICATIONS

digital mobile phone system

 

 

 

PRODUCTS