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- Title
Design and Implementation of a Multi-user Remote Voice Interactive Terminal Access Equipment.
- Authors
LI Hong-guang; GUO Ying; SU Ling-hua; ZHANG Bo; HOU Wen-lin; WANG Ning
- Abstract
This paper attempts to study the key technology of network voice access devices with focus on core modules, i. e. voice AD/ DA conversion and network interface, according to the background of network voice communication in low altitude air traffic control(ATC). The G. 729A voice encode and decode algorithm is optimized both in C and assembly language and flow chart of voice data processing is given. Four channels voice compression coding and twenty channels decode processing are also realized in real-time by single chip TMS320C6455DSP. The network multi-channel voice communication is realized with TCP / IP and multi-channel voice interpolation is solved with solutions accordingly. The test reveals that less than 10 ms time delay of the voice processing device is achieved, which meets the real-time voice transmission demand of multi-subscriber.
- Subjects
AIR traffic control; VOICE frequency; ELECTRONIC data processing; DATA transmission systems; DATA compression
- Publication
Telecommunication Engineering, 2014, Vol 54, Issue 7, p973
- ISSN
1001-893X
- Publication type
Article
- DOI
10.3969/j.issn.1001-893x.2014.07.020