Voice transmission system for wireless sensor network
A wireless sensor network and voice transmission technology, applied in voice analysis, wireless communication, advanced technology, etc., can solve the problems of complex power consumption and insufficient low power consumption, and achieve the effect of low power consumption
Inactive Publication Date: 2013-10-09
SOUTHEAST UNIV
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Abstract
Disclosed in the invention is a voice transmission system for a wireless sensor network. Voice data are converted into PCM values by a CODEC coding unit, wherein the PCM values are 24-bit data of left and right sound channels; the PCM values are transmitted to a bit conversion unit; the bit conversion unit converts the received 24-bit data of the left and right sound channels into two 14-bit left-right sound channel data; the two 14-bit left-right sound channel data are processed by a compressed encoding unit to realize lossy compression of audio data, so that the 14-bit audio data are compressed into 4-bit audio data; the 4-bit audio data are transmitted to a deserializing unit, the deserializing unit converts the 4-bit audio data outputted by the compressed encoding unit into 32-bit audio data so as to carry out bus transmission, and an enabling signal is outputted to an asynchronous FIFO, so that the asynchronous FIFO can take data; and the deserializing unit is connected with a master control unit that is in butt joint with an AHB bus, and the master control unit transmits data in the asynchronous FIFO to a designated storage zone by the AHB bus. According to the invention, a single-frequency and transient detection is removed; a voice coding requirement is ensured; low power consumption is realized; and the voice transmission system is suitable for application to a wireless sensor network to carry out voice transmission.
Application Domain
Power managementSpeech analysis +1
Technology Topic
Data conversionChannel data +15
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