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Lyric alignment in popular songs Luong Minh Thang WING group meeting 12 Oct, 2007
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Outline Recap Repetition Global alignment Local alignment Song model & Segmentation
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Recap Given: textual transcription of lyrics acoustic musical signal of a song Purpose: find the timestamps for the beginning and ending points for each line of the song.
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Recap (cont.) i j Lyric self- similarity matrix Chroma self- similarity matrix Lyric-chroma similarity matrix i j How to generate lyric- chroma similarity matrix?
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Repetition self-similarity matrix j vjvj Linear sequence: v 1, v 2,.., v m + 2 units I, j will have v i, v j approximately equal + count how many times v i are repeated + count how many times v i v i+1..v i+k are repeated + average across length Repetition sequence: r 1, r 2,.., r m
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Repetition (cont.) Chroma repetition contains noise Need to be improved here
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Local alignment Use non-overlapped local alignment Chorus 1 Chorus 2 Chorus 3 Chorus 4 Chorus 2 vs. Chorus 1
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Global alignment Scoring matrix to restrict skip on lyric side Free-end versions
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Local alignment (cont.) Looking at a specific window Use local alignment to detect other segments
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Some figures …
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Song model Divide dataset into 2 categories: I-V1- C1-V2-C2-O & I-V1-C1-v2-C2-V3-C3-O Model for each category to tell the estimated positions of a particular
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Segmentation Align the same segments in lyric and chroma together. Use perfect knowledge to set an aim
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Some figures …
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To be done Incorporate segmentation on chroma side Continue writing thesis Improving repetition values
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Thank you !
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