Maswali yanayounganishwa na mwongozo · Kati Kiwango

Maswali ya Utoaji wa Spectral na Maswali ya Kuchuja Wiener

Kagua jinsi utoaji wa spectral na uchujaji wa Wiener unavyokadiria kelele, kuchakata mwonekano wa STFT, na upotoshaji wa mawimbi ya biashara dhidi ya kelele iliyobaki.

Njia za mwongozo zinazohusianaUtoaji wa Spectral na Uchujaji wa Wiener
Swali 1 ya 8

Ni vizalia gani vya kuudhi ambavyo kwa kawaida huhusishwa na utoaji wa spectral?

Hakiki kila swali8 maswali

Majibu na maelezo huonekana unapojibu maswali.

  1. Ni vizalia gani vya kuudhi ambavyo kwa kawaida huhusishwa na utoaji wa spectral?
    • Kelele za muziki (toni za kupita bila mpangilio)
    • Kughairiwa kwa mwangwi
    • Kurekebisha sauti
    • Kubadilisha lami
  2. Ni katika kikoa gani utoaji wa spectral na uchujaji wa Wiener hufanya kazi hasa?
    • Kikoa cha muda ghafi pekee
    • Kikoa cha marudio baada ya STFT
    • Kikoa cha maandishi
    • Kikoa cha picha
  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. Utoaji wa spectral kawaida hukadiriaje wigo wa kelele?
    • Kutoka kwa jenereta ya nambari isiyo ya kawaida
    • Kutoka kwa nakala ya maandishi
    • Kutoka kwa sehemu ya sauti zaidi ya ishara
    • Kutoka kwa sehemu zisizo na sauti au zisizo na sauti za sauti
  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. Ni dhana gani kuu inayozuia njia zote mbili dhidi ya sauti za ghafla kama mshindo wa mlango?
    • Hotuba hiyo inasikika kila wakati
    • Kwamba kelele ni kiasi stationary
    • Kwamba kuna mzungumzaji mmoja tu
    • Kwamba sauti iko kwenye 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