Voice transmission system for wireless sensor network

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.

Description

technical field [0001] The invention relates to the technical field of voice transmission, in particular to a voice transmission system for a wireless sensor network. Background technique [0002] The pace of scientific and technological development is getting faster and faster, and human beings have been in the information age. As the most important and basic technology for information acquisition - sensor technology has also been greatly developed. Sensor information acquisition technology has gradually developed from simplification in the past to integration, miniaturization and networking, and will bring about an information revolution. [0003] As early as the 1970s, the prototype of sensor network formed by using point-to-point transmission of traditional sensors and connecting sensor controllers appeared. We attribute it to the first generation sensor network. With the continuous development and progress of related disciplines, the sensor network also has the compre...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a voice transmission system for wireless sensor networks, which realizes low-power voice transmission used in wireless sensor networks, and solves the problems of relatively complex and insufficient power consumption in existing voice transmission. question

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