Vocoders by Adaptive Digital

GSM Full Rate Coder

ADT GSM FR C64x | Preliminary C54x C55x

SPEECH CODER

The Adaptive Digital Technologies GSM FR vocoder .pdf 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

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

‘C55x and ‘C54x are preliminary

 

SPECIFICATIONS


GSM FR C64x

All Memory usage is given in units of byte.

Function
MIPS
Program Memory
Data Memory
Per-Channel Data Memory

Scratch
Memory
Encode
2.9
30880
408
740
 688
Decode
2.9
640
 560
Encode / Decode
5.9
--
--
--
 --

Last update: 11/14/2006

GSM FR C55x - preliminary

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

Function
MIPS
Program Memory
Data Memory
Per-Channel Data Memory

Scratch
Memory
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
MIPS
Program Memory
Data Memory
Per-Channel Data Memory

Scratch
Memory
Encode
17.4
5147
204
344
 370
Decode
17.4
280
 320
Encode / Decode
35
--
--
--
 --

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