Kedis ku xidhan hagaha · Dhexdhexaad Heerka

Kala-goynta Spectral iyo Kediska Shaandhaynta Wiener

Dib u eeg sida kala-goynta spectral iyo shaandhaynta Wiener ay u qiyaasaan qaylada, habka STFT spectra, iyo calaamada ganacsiga qalloocan ee ka dhanka ah qaylada haraaga ah.

Wadooyinka haga ee la xidhiidhaKala-goynta Spectral iyo Shaandhaynta Wiener
Su'aal 1 ee 8

Waa maxay artifact dhibsado caadi ahaan la xidhiidha kala-goynta spectral?

Horudhac su'aal kasta8 su'aalo

Jawaabaha iyo sharraxaadaha waxay soo baxayaan markaad qaadanayso kediska.

  1. Waa maxay artifact dhibsado caadi ahaan la xidhiidha kala-goynta spectral?
    • Sawaxanka muusiga ( codad aan kala sooc lahayn)
    • Joojinta Echo
    • Caadiyan mugga
    • Beddelka garoonka
  2. Qaybgee bay ka shaqeeyaan kala-goynta spectral iyo shaandhaynta Wiener?
    • Wakhtiga cayriin oo kaliya
    • Goobta inta jeer ee ka dib STFT
    • Qaybta qoraalka
    • Goobta sawirka
  3. Under a specified statistical signal-and-noise model, what criterion does the classical Wiener estimator minimize?
    • The number of STFT frames
    • The file’s bit rate
    • Expected mean-squared estimation error
    • The number of microphones
  4. Sidee bay u kala goynta spectral caadi ahaan u qiyaastaa spectrum buuqa?
    • Laga soo bilaabo koronto-dhaliye lambar random
    • Laga soo bilaabo qoraalka qoraalka
    • Laga soo bilaabo qaybta ugu qaylada badan ee calaamadda
    • Laga soo bilaabo aamusnaanta ama hadalka ka madax banaan qaybaha codka
  5. In the common power-spectrum Wiener gain G=Ps/(Ps+Pn), what do Ps and Pn denote?
    • Estimated clean-signal and noise powers in that frequency bin
    • Speech and noise sample counts
    • Two different phase angles
    • The number of filters and frames
  6. Waa maxay malo-awaalka muhiimka ah ee xaddidaya labada hab ee ka dhanka ah dhawaaqyada kediska ah ee sida garaaca albaabka?
    • Hadalkaasi mar walba waa mid qaylo badan
    • In sawaxanku yahay mid taagan
    • In uu jiro hal qof oo kaliya
    • In maqalku ku jiro stereo
  7. What may happen to the estimated magnitude in a spectral-subtraction bin when the noise estimate exceeds the observation?
    • It is wrapped into a positive phase
    • It is replaced by a transcript token
    • The negative result is floored to zero
    • It is doubled to preserve loudness
  8. When a real-valued Wiener gain is applied to a complex noisy STFT coefficient, what is commonly done with its phase?
    • Phase is replaced by the text prompt
    • Phase is always set to zero
    • The coefficient is converted into a stereo channel
    • The noisy phase is retained while the magnitude is scaled