本文選題：音頻監(jiān)測 + 音頻采集�。� 參考：《電子科技大學(xué)》2014年碩士論文

【摘要】：隨著廣電技術(shù)的發(fā)展,廣播電臺(tái)處理音頻信號(hào)的數(shù)量和規(guī)模不斷增加,聽眾對廣播音頻信號(hào)的質(zhì)量和性能也提出了更高的要求,并且廣電總局規(guī)定廣播電臺(tái)必須對音頻信號(hào)進(jìn)行實(shí)時(shí)的監(jiān)測與分析,如果僅僅依靠人工監(jiān)測遠(yuǎn)遠(yuǎn)不能滿足音頻信號(hào)監(jiān)測的要求,基于這些考慮設(shè)計(jì)一種可以對音頻信號(hào)進(jìn)行實(shí)時(shí)監(jiān)測分析和自動(dòng)報(bào)警的監(jiān)測系統(tǒng)對廣播電臺(tái)來說具有重要的意義。目前大部分的監(jiān)測系統(tǒng)主要側(cè)重于分布式的監(jiān)測和常見參數(shù)的測量,不便于搭建監(jiān)測系統(tǒng)并且監(jiān)測參數(shù)未考慮人耳的主觀聽覺感受。本論文結(jié)合計(jì)算機(jī)通信技術(shù)、音頻信號(hào)處理技術(shù)設(shè)計(jì)實(shí)現(xiàn)了一種音頻信號(hào)監(jiān)測系統(tǒng),該監(jiān)測系統(tǒng)引入了與人耳的主觀聽覺感受相關(guān)的響度監(jiān)測,并且可實(shí)現(xiàn)音頻信號(hào)的分布式與集中式監(jiān)測。具體的工作內(nèi)容和創(chuàng)新點(diǎn)包括以下幾個(gè)方面:1.音頻監(jiān)測系統(tǒng)的總體方案設(shè)計(jì)。本文分析了常見的音頻監(jiān)測系統(tǒng)的設(shè)計(jì)方案,根據(jù)監(jiān)測系統(tǒng)的監(jiān)測音源、監(jiān)測指標(biāo)和應(yīng)用場合的需求,采用了基于嵌入式平臺(tái)的網(wǎng)絡(luò)化音頻信號(hào)監(jiān)測系統(tǒng)的設(shè)計(jì)方案,該設(shè)計(jì)方案可以實(shí)現(xiàn)對音頻信號(hào)的本機(jī)與遠(yuǎn)程的實(shí)時(shí)監(jiān)測。2.音頻監(jiān)測系統(tǒng)的硬件電路設(shè)計(jì)。監(jiān)測系統(tǒng)的硬件電路設(shè)計(jì)實(shí)現(xiàn)了音頻采集模塊、音頻測量模塊、系統(tǒng)主控模塊和數(shù)據(jù)通信模塊。音頻采集模塊利用專用芯片實(shí)現(xiàn)了專業(yè)級模擬音頻信號(hào)和數(shù)字音頻信號(hào)的數(shù)據(jù)采集和狀態(tài)獲取。數(shù)據(jù)通信模塊采用集成MAC+PHY的物理層芯片擴(kuò)展的方法將監(jiān)測系統(tǒng)接入以太網(wǎng)。音頻測量模塊實(shí)現(xiàn)了基于DSP的音頻指標(biāo)參數(shù)的實(shí)時(shí)測量分析。系統(tǒng)主控模塊實(shí)現(xiàn)了基于ARM的監(jiān)測系統(tǒng)的功能模塊實(shí)時(shí)控制。3.音頻監(jiān)測系統(tǒng)的軟件程序設(shè)計(jì)。軟件設(shè)計(jì)包括音頻測量模塊和系統(tǒng)主控模塊相關(guān)的程序。音頻測量模塊實(shí)現(xiàn)音頻信號(hào)的幅度、相位監(jiān)測的基礎(chǔ)上引入了與人的主觀聽覺感受相關(guān)的響度測量與分析。系統(tǒng)主控模塊移植了嵌入式Linux操作系統(tǒng),設(shè)計(jì)實(shí)現(xiàn)了音頻采集模塊和以太網(wǎng)通信電路的驅(qū)動(dòng)程序,從而實(shí)現(xiàn)了音頻信號(hào)參數(shù)和狀態(tài)的網(wǎng)絡(luò)化的監(jiān)測。通過以上幾部分設(shè)計(jì),本系統(tǒng)可以對廣播級的模擬音頻信號(hào)和數(shù)字音頻信號(hào)進(jìn)行幅度、相位、響度和通道信息的實(shí)時(shí)測量分析,對各種錯(cuò)誤音頻狀態(tài)進(jìn)行報(bào)警,借助于監(jiān)測終端可實(shí)現(xiàn)對音頻信號(hào)的網(wǎng)絡(luò)化監(jiān)測。
[Abstract]:With the development of radio and television technology, the number and scale of audio signal processing by radio station is increasing, and the audience has put forward higher requirements for the quality and performance of broadcast audio signal. Moreover, the State Administration of Radio, Film and Television stipulates that radio stations must carry out real-time monitoring and analysis of audio signals. If manual monitoring alone is far from meeting the requirements of audio signal monitoring, Based on these considerations, it is of great significance to design a monitoring system that can monitor and analyze audio signals in real time and automatic alarm. At present, most of the monitoring systems mainly focus on distributed monitoring and the measurement of common parameters, which is not convenient to build the monitoring system and does not take into account the subjective auditory perception of human ears. In this paper, an audio signal monitoring system based on computer communication and audio signal processing is designed and implemented. The system introduces the loudness monitoring related to the subjective auditory perception of human ear. And it can realize the distributed and centralized monitoring of audio signal. Specific work content and innovation include the following aspects: 1. The overall design of audio monitoring system. This paper analyzes the design scheme of the common audio monitoring system. According to the monitoring sound source, monitoring index and the requirement of the application situation, the design scheme of the network audio signal monitoring system based on embedded platform is adopted. This design scheme can realize the real-time monitoring of audio signal both locally and remotely. Hardware circuit design of audio monitoring system. The hardware circuit design of the monitoring system includes audio acquisition module, audio measurement module, system main control module and data communication module. Audio acquisition module uses special chip to realize data acquisition and state acquisition of professional analog audio signal and digital audio signal. The data communication module connects the monitoring system to Ethernet by extending the physical layer chip of integrated MAC PHY. The audio measurement module realizes the real-time measurement and analysis of audio parameters based on DSP. The main control module of the system realizes the real-time control of the function module of the monitoring system based on arm. The software program design of audio monitoring system. Software design includes audio measurement module and system control module related programs. Based on the audio signal amplitude and phase monitoring, the audio measurement module introduces the loudness measurement and analysis related to human subjective auditory perception. The main control module of the system has transplanted embedded Linux operating system, designed and implemented the driver of audio acquisition module and Ethernet communication circuit, thus realized the network monitoring of audio signal parameters and status. Through the design of the above several parts, the system can measure and analyze the amplitude, phase, loudness and channel information of the analog audio signal and the digital audio signal in the broadcast level in real time, and alarm all kinds of false audio state. The network monitoring of audio signal can be realized by means of monitoring terminal.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN912.3

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本文編號(hào)：1998113