Name
Abstract | ||
|---|---|---|
In this paper, we describe the enhanced full rate (EFR) speech codec that has recently been standardised for the North American TDMA digital cellular system (IS-136). The EFR codec, specified in the IS-641 standard, has been jointly developed by Nokia and University of Sherbrooke. The codec consists of 7.4 kbit/s speech (source) coding and 5.6 kbit/s channel coding (error protection) resulting in a 13.0 kbit/s gross bit-rate in the channel. Speech coding is based on the ACELP algorithm (Algebraic Code Excited Linear Prediction). The codec offers speech quality close to that of wireline telephony (G.726 32 kbit/s ADPCM used as a wireline reference) and provides a substantial improvement over the quality of the current speech channel. The improved speech quality is not only achieved in error-free conditions, but also in typical cellular operating conditions including transmission errors, environmental noise, and tandeming of speech codecs. |
Year | DOI | Venue |
|---|---|---|
1997 | 10.1109/ICASSP.1997.596014 | ICASSP |
Keywords | Field | DocType |
enhanced full rate speech,is-136 digital cellular system,digital radio,operant conditioning,time division multiple access,source code,code excited linear prediction,source coding,standardisation,algebraic code excited linear prediction,linear predictive coding,channel coding,speech coding,telephony | Enhanced full rate,Speech coding,Adaptive Multi-Rate audio codec,Computer science,Voice activity detection,Full Rate,Speech recognition,Codec2,Harmonic Vector Excitation Coding,Enhanced Variable Rate Codec | Conference |
ISBN | Citations | PageRank |
0-8186-7919-0 | 18 | 3.06 |
References | Authors | |
1 | 7 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| T. Honkanen | 1 | 18 | 3.06 |
| J. Vainio | 2 | 18 | 3.06 |
| K. Jarvinen | 3 | 149 | 18.83 |
| P. Haavisto | 4 | 46 | 8.00 |
| R. Salami | 5 | 196 | 24.90 |
| C. Laflamme | 6 | 169 | 21.28 |
| J. Adoul | 7 | 290 | 63.42 |