Kedis ku xidhan hagaha · Dhexdhexaad Heerka

Kediska Isbadalka iyo Wakhtiga Bixinta

Kala saar garoonnada ka beddelashada wakhtiga oo is barbar dhig vocoder wajiga, PSOLA iyo hababka neerfaha iyo farshaxankooda.

Wadooyinka haga ee la xidhiidhaIsbeddelka Garoonka iyo Bixinta Waqtiga
Su'aal 1 ee 8

During pitch shifting, which property should change while duration remains stable?

Horudhac su'aal kasta8 su'aalo

Jawaabaha iyo sharraxaadaha waxay soo baxayaan markaad qaadanayso kediska.

  1. During pitch shifting, which property should change while duration remains stable?
    • Change duration while preserving pitch
    • Change loudness while preserving both
    • Change perceived pitch while preserving duration
    • Convert stereo audio to mono
  2. During time stretching, which property should change while pitch remains stable?
    • Change pitch while preserving duration
    • Change duration while preserving pitch
    • Remove all transients
    • Change only the sample-rate metadata
  3. What happens when playback rate is changed directly without compensation?
    • Only pitch changes
    • Only duration changes
    • Neither changes
    • Duration and pitch both change
  4. Which representation does a conventional phase-vocoder implementation modify?
    • Short-time Fourier transform domain
    • A text-token sequence from a speech recognizer
    • A pitch-class histogram with all phase discarded
    • An unframed average power spectrum with no time information
  5. Which signal can expose transient smearing in a phase vocoder?
    • A long steady sinusoid without a transient onset in the evaluated region
    • A slowly varying sustained tone
    • Percussive audio with sharp attacks
    • A stationary segment whose amplitude and frequency remain constant
  6. What does PSOLA rely on for voiced speech processing?
    • An arbitrary frame grid unrelated to voicing
    • Pitch-synchronous marks or periods
    • Only the transcript's word boundaries
    • Only the average spectrum of the whole recording
  7. During ordinary sample-rate conversion, what happens when the output sample rate is correctly updated to represent the same signal?
    • Pitch necessarily rises at every new sample rate
    • Duration always halves during any rate conversion
    • Pitch must change even when the output represents the same time span
    • Pitch and duration are preserved rather than intentionally shifted
  8. How should an audio augmentation transformation be chosen?
    • Keep changes plausible and preserve the task label
    • Use the largest possible stretch
    • Apply it to test data until results improve
    • Choose a method without listening