The week's pick
Random Articles
Reseach Article
Comparison of Low-Rate Speech Transcoders in Electronic Warfare Situations: Ambe-3000 to G.711, G.726, CVSD
| International Journal of Computer Applications |
| Foundation of Computer Science (FCS), NY, USA |
| Volume 128 - Number 8 |
| Year of Publication: 2015 |
| Authors: V. Govindu, Parthraj Tripathi, B. Leela Kumari |
10.5120/ijca2015906619
|
V. Govindu, Parthraj Tripathi, B. Leela Kumari . Comparison of Low-Rate Speech Transcoders in Electronic Warfare Situations: Ambe-3000 to G.711, G.726, CVSD. International Journal of Computer Applications. 128, 8 ( October 2015), 20-25. DOI=10.5120/ijca2015906619
Abstract
Continuous efforts are active to reduce the bit rates but maintaining channel noise tolerance, secure transmission and justified MOS(mean opinion score) among various communication networks. These networks at their end-terminals may employ variety of vocoders operating at different individual bit rates. In order to maintain fidelity, transcoders are used to map the information when traffic flows from one channel operating at one bit rate to another channel operating on another bit rate as seen in the case of channels with different capacities. Some networks (like satellite communication and some private networks) employs codecs like AMBE (Advanced Multiband Excitation), CVSD for their very low bit rate, channel noise tolerant attributes and another features. In order to interface networks accompanying the said vocoders with that of public networks containing codec like PCM, ADPCM, we have done feasibility study for justified MOS using AMBE-3000 HDK. Also, we have compared Transcoders against MOS.
References
- Jayant, N., "Digital coding of speech waveforms: PCM, DPCM, and DM quantizers," in Proceedings of the IEEE, vol.62, no.5, pp.611-632, May 1974 doi: 10.1109/PROC.1974.9484.
- Tremain T E. The Government Standard Linear Predictive Coding Algorithm: LPC-10[J] Speech Technology.1982, 4:40-49.
- AMBE-3000(TM) Vocoder Chip Users Manual Version 2.2.Digital Voice Systems Inc., May, 2010.
- QIANG Wei, XU Yu-bin, SHA Xue-jun, GU Shuo. Application of AD73311 A/D converter in digital speech coding [J]. Journal of Harbin Institute of Technology, vol. 38, No. 5, 2006, pp. 780-782.
- DU Jun, GAO Jun, LI Nan. Design of the Multi-mode Digital Speech Communication System Based on AMBE-2000 and DSP [J]. Ship Electronic Engineering, vol. 28, No. 2, 2008, pp. 80-82.
Index Terms
Keywords