A perceptually motivated stationary wavelet packet filterbank using improved spectral over-subtraction for enhancement of speech in various noise environments.
Navneet UpadhyayAbhijit KarmakarPublished in: Int. J. Speech Technol. (2014)
Keyphrases
- filter bank
- wavelet packet
- subband
- image coding
- linear prediction
- spectral analysis
- multiscale
- multiresolution
- wavelet packet transform
- signal processing
- frequency domain
- low frequency
- computationally efficient
- speech recognition
- wavelet packet decomposition
- non stationary
- wavelet filters
- wavelet transform
- wavelet decomposition
- image compression
- feature vectors
- image coder
- lifting scheme
- speech signal
- image enhancement
- wavelet coefficients
- building blocks
- signal to noise ratio
- frequency band
- high frequency
- bit rate
- wavelet bases
- image processing
- discrete wavelet transform
- spatial domain
- median filter
- noise reduction
- neural network
- pattern recognition