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Audio applications over wireless networks have recently emerged as a promising research field. However, the limits in terms of communication bandwidth and transmission power have withstood the design of low-power embedded nodes for audio communication. In this work we describe the implementation details of an embedded system for the wireless broadcasting of audio signals over the low data rate wireless system. Here the audio data transferred through a wireless network instead of alarms. That is it tells how to go and where the disaster occurs. This is a challenging task because the effective data rate available in mesh network is low. Most of the bandwidth is consumed by alarm/data communication and audio steering is a real time application. Because of this low data rate we use Huffman compression and decompression algorithms to compress and decompress the audio data. KeywordsCompression; Decompression; Huffman algorithm; Radios; frequency hopping.

Audio streaming over low data rate wireless system