語(yǔ)音靜噪是以語(yǔ)音檢測(cè)為基礎(chǔ)實(shí)現(xiàn)無(wú)語(yǔ)音時(shí)屏蔽系統(tǒng)輸出的一項(xiàng)功能。由于短波電臺(tái)
接收機(jī)存在諸多噪聲干擾，致使語(yǔ)音靜噪較難實(shí)現(xiàn)。本文設(shè)計(jì)實(shí)現(xiàn)一種以TMS320F2812 DSP芯片為核心的語(yǔ)音檢測(cè)系統(tǒng)，對(duì)短波電臺(tái)接收到的信號(hào)進(jìn)行分析和處理，并應(yīng)用短時(shí)自相關(guān)算法進(jìn)行語(yǔ)音檢測(cè)。如果檢測(cè)存在語(yǔ)音信號(hào)則通過DA把語(yǔ)音轉(zhuǎn)換輸出。通過在實(shí)際應(yīng)用環(huán)境中測(cè)試表明該語(yǔ)音檢測(cè)系統(tǒng)結(jié)構(gòu)簡(jiǎn)單，語(yǔ)音檢測(cè)準(zhǔn)確度高，可以有效解決短波電臺(tái)的語(yǔ)音靜噪問題。
關(guān)鍵詞：短波電臺(tái)； 語(yǔ)音檢測(cè)； 自相關(guān)；
Abstract： Speech noise silencing is testing voice-based to achieve shield the system
output function when there is no speech. As the short-wave radio receiver there is
a lot of noise, with the result that more difficult to achieve noise-cancellation.
in this paper，designed to achieve a voice detection system which make the TMS320F2812
DSP chip as its core. This system can analysis and process the signal received by
the shortwave radio and detect the voice by the short-time auto-correlation. If
speech signal is detected，then it can be transformed to output through DA. Through
the practical application of the test environment show that the voice detection
system is simple, highly accurate detection of voice can be an effective solution
to short-wave radio voice of the noise silencing.
Keywords: Short-wave Radio; voice detection; autocorrelation;