本文關(guān)鍵詞：面向情感分析的古箏樂曲聲譜圖信息主干提取　出處：《復(fù)旦學(xué)報(自然科學(xué)版)》2017年02期 　論文類型：期刊論文

  更多相關(guān)文章： 古箏 情感分析 聲譜圖

【摘要】：古箏是一種古老的中國傳統(tǒng)民族樂器,為一弦一音的彈撥樂器.情感作為古箏演奏中的重要表達(dá)成分,受到各種演奏技法的影響.本文分析了各種不同演奏技法所產(chǎn)生的聲音信號的頻譜以及聲譜圖特點,并提出了一種基于聲譜圖有限局部峰值的樂曲信息主干提取方法.樂曲信息主干提取分為時域提取與頻域提取兩個步驟.首先,義甲觸弦瞬間,會出現(xiàn)短暫的非諧波性質(zhì)的碰撞聲,與后續(xù)琴弦穩(wěn)定振動期間的聲譜圖橫條紋形成對比,通過對聲譜圖進(jìn)行時域一階差分,并根據(jù)設(shè)定閾值二值化,能夠準(zhǔn)確獲得各音符的觸弦時間點;其次,在每一音符時間范圍內(nèi),對聲譜圖進(jìn)頻域一階差分,獲取各幀頻域峰值位置,并對各峰值根據(jù)幅值進(jìn)行排序后保留有限個峰值坐標(biāo),同時根據(jù)前后音符對比,去除因前一音符聲音的延續(xù)造成的對后一音符聲譜圖的影響.通過樂曲聲譜圖主干提取,能夠有效地體現(xiàn)出組成樂曲的各音符的主要信息,為進(jìn)一步深入分析古箏曲的情緒提供基礎(chǔ).
[Abstract]:Guzheng is an ancient Chinese traditional national musical instrument, which is a plucked instrument with one string and one tone. Emotion is an important expression component in playing guzheng. Under the influence of various playing techniques, this paper analyzes the frequency spectrum and the characteristics of sound spectrum of the sound signals produced by different playing techniques. A music information trunk extraction method based on the finite local peak value of sound spectrum is proposed. The music information trunk extraction is divided into two steps: time domain extraction and frequency domain extraction. There will be a transient non-harmonic collision sound, which is compared with the transverse stripes of the sound spectrum during the subsequent steady vibration of the string. The first order difference of the sound spectrum is carried out, and the threshold is binary according to the set threshold. Can accurately obtain the chord contact point of each note; Secondly, in the time range of each note, the first order difference of the forward frequency domain of the acoustic spectrum is obtained, and the peak position of each frame in frequency domain is obtained, and the peak value is sorted according to the amplitude, and a limited number of peak coordinates are retained. At the same time, according to the comparison of the two notes, the influence of the continuation of the former note on the latter note is removed. The music sonogram is extracted by the trunk of the music sonogram. It can effectively reflect the main information of each note of the composition of the music, and provide a basis for further analysis of the mood of the guzheng music.
【作者單位】： 蘇州大學(xué)物理與光電·能源學(xué)部;
【基金】：江蘇省自然科學(xué)基金青年基金(BK20140354)
【分類號】：TN912.3
【正文快照】： 古箏又名漢箏、秦箏、瑤箏、鸞箏等,是最古老的中國民族傳統(tǒng)樂器中的一種,屬于彈撥樂器,一弦一音.它的音色優(yōu)美,音域?qū)拸V、演奏技巧豐富,表現(xiàn)力強,有“群聲之主,眾樂之師”之美稱.戰(zhàn)國時期盛行于“秦”地,最早為五弦,唐宋時為十三弦,后增至十六弦、十八弦、二十一弦等,目前最

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