Sinsy: HMM. Sinsy An HMM-based singing voice synthesis system which can realize your wish I want this person to sing my song
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1 . Sinsy: HMM 2 (hidden Markov model; HMM) HMM : Sinsy Sinsy 70 Sinsy Sinsy An HMM-based singing voice synthesis system which can realize your wish I want this person to sing my song Keiichiro Oura, Ayami Mase, Tomohiko Yamada, Keiichi Tokuda and Masataka Goto 2 A statistical parametric approach to singing voice synthesis based on hidden Markov models (HMMs) has been grown over the last few years. In this approach, spectrum, excitation, and duration of singing voices are simultaneously modeled by context-dependent HMMs, and waveforms are generated from HMMs themselves. Since December 2009, we started a free on-line service named Sinsy. By uploading musical scores represented by MusicXML to the Sinsy website, users can obtain synthesized singing voices. However, a high recording cost may be required to train new singer s model because a speakerdependent model trained by using 70 songs is used in Sinsy. The present paper describes the recent developments of Sinsy and a speaker adaptation technique to generate waveforms from a small amount of adaptation data. (hidden Markov model; HMM) ) HMM HMM 2) 3) 4) HMM 5) HMM HMM : Sinsy 6) Sinsy HTS 7) hts engine API 8) SPTK 9) STRAIGHT 0) CrestMuseXML Toolkit ) MusicXML 2) Sinsy 70 Sinsy (Constrained Maximum-Likelihood Linear Regression; CMLLR) 3) 2 HMM Sinsy 3 Sinsy Sinsy HMM Sinsy 2. HMM Vocaloid 4) Nagoya Institute of Technology (NIT) 2 National Institute of Advanced Industrial Science and Technology (AIST) c 200 Information Processing Society of Japan
2 VocaListener 5) Sinsy Sinsy HMM Vocaloid HMM ( ) ( 2 ) ( 3 ) ( 4 ) 4 2) 3) HMM 5) 6) HMM 3.2 HMM 7) MLSA 8) Fig. SINGING VOICE DATABASE Label Context-dependent HMMs and duration models MUSICAL SCORE Conversion Speech signal Label Excitation parameter extraction F0 F0 Training of HMM Parameter generation from HMM Excitation generation Spectral parameter extraction MLSA filter Mel-cepstrum Mel-cepstrum Training part Synthesis part SYNTHESIZED SINGING VOICE HMM The overview of the HMM-based singing voice synthesis system. 2.2 Sinsy Speech Signal Processing Toolkit (SPTK) SPTK-3.3 9) UNIX BSD 9) Sinsy 6) SPTK STRAIGHT STRAIGHT V40 0), 20) Sinsy STRAIGHT STRAIGHT HMM-based Speech Synthesis System (HTS) HTS-2.. 7), 2) HMM Sinsy HMM HTK 22) BSD 9) HTK HTK 2 c 200 Information Processing Society of Japan
3 CrestMuseXML Toolkit (CMX) MusicXML-2.0 2) ), 23) CMX MusicXML MusicXML HMM-based Speech Synthesis Engine (hts engine API) HTK HTS Sinsy SourceForge HMM hts engine API-.03 8) HTK HTS BSD 9) MusicXML HMM MusicXML 5 MusicXML Sinsy MusicXML MusicXML 70% 30% MusicXML 3. Sinsy HMM 3. 24) HMM ) Sinsy 25) <?xml version=.0 encoding= UTF-8 > <!DOCTYPE score-partwise PUBLIC -//Recordare//DTD MusicXML 2.0 Partwise//EN >... <measure number= > <attributes> <divisions></divisions> <key> <fifths>0</fifths> <fifths>major</fifths> </key> <time> <beats>4</beats> <beat-type>4</beat-type> </time>... </attributes> <sound tempo= 20 /> <note> <pitch> <step>e</step> <octave>5</octave> </pitch> <duration>2</duration> <type>half</type> <lyric> <text> </text> </lyric> </note> <note> <pitch> <step>c</step> <octave>5</octave> </pitch> <duration>2</duration> <type>half</type> <lyric> <text> </text> </lyric> </note> </measure> </part> </score-partwise> 2 2 MusicXML Fig. 2 An example of MusicXML. 3 c 200 Information Processing Society of Japan
4 Waveform Log F 0 : Vibrato 4 Fig. 4 An example of vibrato parts in a log F 0 sequence. 3 HMM Sinsy Fig. 3 HMM-based Speech Synthesis System Sinsy ), 27) 4 HMM Sinsy 28) t = 0,,..., T + i = 0,,..., M ν ( ) ν ( m a (t), m f (t), i ) = m a (t) sin ( ( )) 2π m f (t) f s t t (i) 0, () f s t (i) 0 i m a (t) m f (t) t 27) 5 c = log 2/200 cent o t o (spec) t o (F 0) t o (vib) t s b s (o t ) ( ) ( ) b s (o t ) = p γspec s o (spec) γ F0 t p s o (F 0) ( ) t p γ vib s o (vib) t (2) γ spec, γ F0, γ vib 3 4 c 200 Information Processing Society of Japan
5 m f(t ) m f(t 3) Before pitch-shift After pitch-shift Log F 0 0 2c. m a(t 0) m f(t 0) 2c. m a(t ) 2c. m a(t 2) m f(t 2) 2c. m a(t 3) 2c. m a(t 4) m f(t 4) t 0 t t 2 t 3 t 4 t 5 t 6 Frame index 5 Fig. 5 The vibrato parameter analysis ) Sinsy 30) (Minimum Description Length; MDL) 3) 3 Sinsy MDL HMM The number of notes G3 Ab3 A3 Bb3 B3 C4 Db4 D4 Eb4 E4 F4 Gb4 G4 Ab4 A4 Bb4 B4 Pitch 6 0 Fig. 6 The distribution of pitch in training data (0 songs). S q S q+ S q q q = L (S ) { L ( S q+ ) + L ( S q )} + α N 2 log Γ (S 0) (3) L ( ) S 0 α N Γ ( ) 3.4 HMM HMM HMM EM t = 0,..., T + i =,..., M α i (t) β i (t) M (T + ) Sinsy 32) 7 t i k Note start (k) Note end (k) Margin start (k) Margin end (k) t t = Note start (k) Margin start (k) (4) C5 Db5 D5 Eb5 E5 F5 5 c 200 Information Processing Society of Japan
6 sa i ta sa i ta Note start(k) Note end(k) Note timing sil y a n e y o Voice timing sil y a n e y o r i r i khz Model index Margin start(k) Margin end(k) Spectrogram of natural singing voice Waveform of natural singing voice Frame number Search space before pruning Search space after pruning 8 Fig. 8 An example of timings. Fig. 7 7 The pruning approach using note boundaries. 4. t = Note end (k) + Margin end (k) (5) 3.5 HMM HMM 5) 8 Sinsy WFST 33) HSMM 34) k T k T k = T k g k + g k, (6) T k g k Sinsy 70 CMLLR 3) CMLLR HMM i µ i, U i ˆµ i Û i H i b i ˆµ i = H i µ i + b i (7) Û i = H i U i H i (8) H i b i EM CMLLR H i, b i H i, b i 35) f kHz 6bit STRAIGHT 20) 6) 50, 2, 2 6 c 200 Information Processing Society of Japan
7 (cent) (Hz), cent 5-8Hz 36), 37) HMM 5 left-to-right HSMM 34) 5ms MDL 3) α (3) 5.0 HMM 2.6MBytes 5.2 f00 Vocaloid2 4) RWC (RWC-MDB-P-200) 38) (Rin) (f00) (KBytes) Table The total file sizes of Sinsy (KBytes). Front-end program (CMX) 456 Phoneme table 3 Back-end program (hts engine API) 677 Acoustic model 652 Total file size of Sinsy Table 2 Adaptation data. Singer Model Total song length for adaptation f00 (Sinsy) Speaker-dependent model - Miku Hatsune (CV0) Speaker adapted model 9m28s (5 songs) Rin (RWC-MDB-P-200) Speaker adapted model 7m59s (7 songs) 6. Singer recognition rate (%) f00 (Sinsy) Miku Hatsune (CV0) 9 Fig. 9 Subjective evaluation results. Rin (RWC-MDB-P-200) HMM Sinsy HMM HMM Sinsy Sinsy MusicXML MusicXML Sinsy CGM SCOPE 5. ) T.Yoshimura, K.Tokuda, T.Masuko, T.Kobayashi, and T.Kitamura, Simultaneous Modeling of Spectrum, Pitch and Duration in HMM-based Speech Synthesis, Proc.of Eurospeech, pp , ) J. Yamagishi, Average-Voice-based Speech Synthesis, Ph. D. thesis, Tokyo Institute of Technology, ) T.Yoshimura, K.Tokuda, T.Masuko, T.Kobayashi, and T.Kitamura, Speaker Interpolation in HMM-based Speech Synthesis System, Proc.of Eurospeech, pp , c 200 Information Processing Society of Japan
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