【摘要】： 音頻信息是一類非常重要的多媒體信息。隨著人們每次能夠處理的音頻信息量越來越大、音頻信息的種類越來越繁多,要從海量的信息中迅速有效地檢索出所需要的信息就變得越來越重要。然而,音頻信息檢索的研究一直沒有得到足夠的重視。尤其是基于內(nèi)容的多模板的實(shí)時(shí)音頻檢索更是很少被人提及。 本文研究的是基于內(nèi)容的音頻檢索。研究的切入點(diǎn)是電臺廣告,研究的目標(biāo)是要在眾多的音頻電臺節(jié)目中快速、有效的檢出指定的幾個(gè)電臺廣告,通過監(jiān)播確定其實(shí)際播出的時(shí)間、終止時(shí)間以及播出次數(shù)等。 本文根據(jù)電臺信號的實(shí)時(shí)性和連續(xù)性的特點(diǎn),給出了監(jiān)播系統(tǒng)的整體方案設(shè)計(jì)。將實(shí)時(shí)廣告監(jiān)播過程分為兩個(gè)步驟:廣告頭定位和檢出處理。廣告頭定位的目的是實(shí)時(shí)地判斷出當(dāng)前電臺節(jié)目是否可能是待監(jiān)測廣告,如果是則進(jìn)一步判斷可能是哪幾個(gè)廣告,以便為廣告的檢出做一些指導(dǎo)性的工作。檢出處理需要完成的工作則是準(zhǔn)確判斷出定位后的電臺節(jié)目究竟是不是待監(jiān)測廣告,如果是則要準(zhǔn)確指出是哪個(gè)廣告。在廣告定位前,對音頻特征進(jìn)行了有效的選取,在音頻檢索中以便能更快速的檢出廣告。運(yùn)用音頻特征對廣告頭片段運(yùn)用門限法進(jìn)行檢索,并對廣告頭進(jìn)行定位,從定位點(diǎn)截取廣告的長度,作為廣告待測模板。本文為檢出處理采用了兩種方案,便于實(shí)時(shí)處理的動態(tài)時(shí)間規(guī)整和聚類的矢量量化技術(shù)。并通過大量的實(shí)驗(yàn)對這些方法的可行性進(jìn)行了驗(yàn)證和比較。并取得了較好的效果。
[Abstract]:Audio information is a kind of very important multimedia information. With the increasing amount of audio information that people can deal with each time, the variety of audio information becomes more and more diverse, so it is more and more important to retrieve the needed information quickly and effectively from the massive information. However, the research of audio information retrieval has not been paid enough attention to. In particular, content-based multi-template real-time audio retrieval is rarely mentioned. This paper focuses on content-based audio retrieval. The starting point of the research is radio advertising. The goal of the research is to detect several radio advertisements quickly and effectively in many audio radio programs, and to determine the actual broadcast time, termination time and broadcasting times through monitoring and broadcasting. According to the characteristics of real-time and continuity of radio signal, this paper gives the overall scheme design of monitoring and broadcasting system. The real-time advertising monitoring and broadcasting process is divided into two steps: ad header positioning and check-out processing. The purpose of ad header positioning is to determine whether the current radio program is likely to be an ad to be monitored in real time, and if so, to further determine which advertisements may be in order to do some guiding work for the detection of advertisements. What needs to be done is to find out exactly whether the radio program is to be monitored, and if so, which one. In order to detect advertisements more quickly, audio features are selected effectively before advertising positioning. Using audio features to search the advertising header using threshold method and locating the advertising head the length of the advertisement is intercepted from the location point as the template for advertising to be tested. In this paper, two methods are used for detection processing, such as dynamic time warping and vector quantization for real time processing. The feasibility of these methods is verified and compared by a large number of experiments. Good results have been obtained.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2006
【分類號】：TP391.3

【引證文獻(xiàn)】

相關(guān)博士學(xué)位論文 前1條

1 何新;基于內(nèi)容的音頻信息分類檢索技術(shù)研究[D];南京理工大學(xué);2007年

相關(guān)碩士學(xué)位論文 前2條

1 付濤;基于DSP的音頻信號快速評測系統(tǒng)的硬件設(shè)計(jì)[D];哈爾濱工程大學(xué);2011年

2 王亞平;基于Android的中文語音短信應(yīng)用設(shè)計(jì)[D];內(nèi)蒙古科技大學(xué);2012年

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本文編號：2170005