Time-scale and pitch modification - PowerPoint PPT Presentation

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Time-scale and pitch modification

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Title: Time-scale and pitch modification Author: Alexey Lukin Last modified by: Alex Created Date: 9/21/2006 4:47:55 PM Document presentation format – PowerPoint PPT presentation

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Title: Time-scale and pitch modification


1
????????? ????????????? ?????? ????????
??????? ?????
2
??????
  • ????????? ???????? ???????????? ???????? ???
    ?????? ???????? ?????????? ???? ?????
  • ??????? ??????
  • (??????????) ??????? ?? ????? ? ??????? ????????
    ????????? ?????
  • (????????) ?????? ??????? ?????????????
    (resampling)
  • ??? ?????? ? ???????????? ???????? ?????????!

Celine Dion
????????? ?? 20
3
??????
  • ??????????? ????????? ?????? ? ????????????, ?
    ??????????? ????????????? ????????
  • ??????????
  • ???????? ? ??????????? ???????????
  • ?????????? ???????? ??????? ??? ??
  • ??????? ????? ???????????
  • ???????? ????????? ? ???????? ??????

4
????????? ???????
  • ?????? ????????? ??????? ???????? ? ??????
  • ????????? ?????? ?? ???????? ??????? (????)
  • ????????? ??? ?????????? (??? ????????) ???????
    ??? ????????? ????????????
  • ????????????????? ??? ????????? ??????

????????? ???????? ??????? ??????????? J. Bonada
5
????????? ???????
  • ?????? ????????? ??????? ???????? ? ??????
  • ????????? ?????? ?? ???????? ??????? (????)
  • ????????? ??? ?????????? (??? ????????) ???????
    ??? ????????? ????????????
  • ????????????????? ??? ????????? ??????
  • ????????
  • ??????? ????? ???????????? ? ???? (??????) ??? ?
    ??????????? (?????)
  • ?????????? ????? ???????? ??? ?????????????

Guitarcastanets
?????????? ?? 220 ?????
6
????????? ???????
  • ???????
  • ????? ??????? ?????? ??????? ????????? ????,
    ????? ??? ???????? ? ???? (????????? ??????????
    ?????????????? ??? ?????? ?????? ???. ????)
  • ?????? ???????????? ??? ??????????? ?????? ?
    ???????????? (????????? ????? ??????????? ?
    ?????????? ???? ????????? ??????)

????????????? ?????? ??????
Pitch-synchronous granule size (PSOLA)
Pitch-synchronous granule size, transients
detection
7
????????? ???????
  • Pitch-synchronous overlap-add (PSOLA)
  • ?????? ?????? 2 ??????? ???. ????
  • ??????? ??????????? ??? ????????????
  • ???????????? ?????????? ??? ???????????? ???
    ??????????????? ?????????

8
????????? ???????
  • ??????
  • ??????? ???????? (15 CPU)
  • ??????? ???????? ??? ??????? ???????????? ?
    ??????
  • ?????? ???????? ??? ???????????? ???
    ??????????????? ?????????
  • ??????????? ????????? (????? ???? ???????????? ??
    ? ????)
  • ??????????? ??? ???????? ?????????? (???? ??????
    ?? ???? ?? ??????????)
  • ??????????
  • ?????????, ???????? Audition, Cubase , Logic,
    Ableton, ACID
  • ????????? ?????? Melodyne, Autotune



9
????????
  • ?????? ????????? ??????? ???????? ? ???????
    ???????? ???????
  • ???? ????????? ????????????? (????????? STFT) ?
    ??????????????? ???? ? ???????????? ????? ??
    ??????? (synthesis hop)
  • ???????? ??? ??????? ??????? ??????? ?????
    ???????????? ?? ? ????
  • ??????? ????????? ?????? ?????? ???????
  • (?????????????? ????)

10
????????
  • ???????????? ????????
  • ????????? STFT ?? ???????
  • ?????????? ???? ??? ??????? ?????????? ??????
    (????? ??????????????? ????????? ???? ???????),
    ?? ???????? ?????????
  • ????????????? ?????? ???????? STFT ? ?????? ?????
    ?? ???????

11
????????
  • ????????? ?? ??????????
  • ??????? ??? ?????????????? ??? ????????????
    ???????? ? ???? ??? ????? ???????? ??????? STFT
    (????????????? ??????? ?????????????)

(????????? ????)
(?????????????? ????)
(???? ??? ???????)
12
????????
  • ???????? ??????? ?????????????
  • ?????????????? ????????????? ??????????????
    ??????????????? ???
  • ??? ?????? ???????????? ??????????????
    (??????????????? ??? ? ???????? ?????????
    ???????) ??? ?????????! (?? ??????????? ??????
    ?????????????? ??????????) ??? ?????????
  • Phasiness ??-?? ???????? ?? ? ???? ????????
    ???????, ????????????? ?????? ???? ?????????
    ???????
  • ???????? ???????????? ?? ??? ???????

Guitarcastanets
Vocoder 220 length
13
????????
  • ????????? ???????????? ??????? ?????????????
    ???????? ??????? ?????????? ????????? ???????
    ??????????? ? ???????? ??????? ????????????? ????
  • ????? ?????? ?? ????????? ?????????,
    ??????????????? ?????
  • ????????????? ???? ???????????? (????????) ??????
  • ????????????? ???? ?????????? ??????? ????????
    ????????????
  • ??? ????????? ?????????, ?? ?? ??????? ??
    ???????? ???????????

??? ??????? ??????????
? ???????????
14
????????
  • ??? ????????????? ???????? ????????????
  • ????????? ?????????? ????? ???????????? ???
    ????? ?? ?????? ? ???? ?? ??????? ????????
  • ????? ???????????? ??????? ???? ?? ?? (???
    ??????? ?????????? ??????????) ? ???????? ???? ??
    ??

? ??????? ???????????
? ???????????? ??????? ????????? ????
15
????????
  • ??? ????????????? ???????? ????????????
  • ????? ????????? ?????????? ? ??????????????
    ?????? ??? ?????????? (? ??????????? ???)
  • ?????????????? ??? ???????? ?????? ??????????

Phase locking and multiple window sizes
transients pasted
16
????????
  • ??????
  • ??????? ???????? ??? ???????, ??????????????
    ??????
  • ????????? ????????? (???? ? ???????
    ???????????)
  • ???????? ??????????? (???? ?? ?? ????????????)
  • ??????? ??????? ????? ??????? ?????????????
  • ??????? ????????? (?? ??????? ????????? ???????)
  • ??????????
  • ?????????????????? ????????? SlowGold, Serato
    TimenPitch, iZotope Radius


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