• Publications
  • Influence
Signal processing with lapped transforms
Applications of transforms in signal processing signal processing in subbands lapped orthogonal transforms the modulated lapped transform heirarchical lapped transforms applications of lappedExpand
Low-complexity transform and quantization in H.264/AVC
TLDR
The 4/spl times/4 transforms in H.264 can be computed exactly in integer arithmetic, thus avoiding inverse transform mismatch problems and minimizing computational complexity, especially for low-end processors. Expand
Improved spread spectrum: a new modulation technique for robust watermarking
TLDR
The proposed ISS is as robust in practice as traditional SS, and achieves roughly the same noise robustness gain as quantization index modulation (QIM) but without the amplitude scale sensitivity of QIM. Expand
High-quality linear interpolation for demosaicing of Bayer-patterned color images
TLDR
A new interpolation technique for demosaicing of color images produced by single-CCD digital cameras shows that the proposed simple linear filter can lead to an improvement in PSNR and improvement in R and B interpolation when compared to a recently introduced linear interpolator. Expand
The LOT: transform coding without blocking effects
  • H. Malvar, D. Staelin
  • Mathematics, Computer Science
  • IEEE Trans. Acoust. Speech Signal Process.
  • 1 April 1989
An exact derivation of an optimal lapped orthogonal transform (LOT) is presented. The optimal LOT is related to the discrete cosine transform (DCT) in such a way that a fast algorithm for a nearlyExpand
Lapped transforms for efficient transform/subband coding
  • H. Malvar
  • Mathematics, Computer Science
  • IEEE Trans. Acoust. Speech Signal Process.
  • 1 June 1990
Two lapped transforms for subband/transform coding of signals are introduced: a version of the lapped orthogonal transform (LOT), which can be efficiently computed for any transform length; and theExpand
A modulated complex lapped transform and its applications to audio processing
  • H. Malvar
  • Computer Science
  • IEEE International Conference on Acoustics…
  • 15 March 1999
TLDR
This paper introduces a new structure for a modulated complex lapped transform (MCLT), which is a complex extension of the modulated lapping transform (MLT), whose real part corresponds to the MLT. Expand
Biorthogonal and nonuniform lapped transforms for transform coding with reduced blocking and ringing artifacts
  • H. Malvar
  • Mathematics, Computer Science
  • IEEE Trans. Signal Process.
  • 1 April 1998
TLDR
The HLBT has a significantly lower computational complexity than the lapped orthogonal transform (LOT), essentially no blocking artifacts, and fewer ringing artifacts than the commonly used discrete cosine transform (DCT). Expand
Extended lapped transforms: properties, applications, and fast algorithms
  • H. Malvar
  • Mathematics, Computer Science
  • IEEE Trans. Signal Process.
  • 1 November 1992
TLDR
The extended lapped transform (ELT) is introduced, as a generalization of the previously reported modulated lapping transform (MLT), which is a promising substitute for traditional block transforms in transform coding systems, and also a good substitute for less efficient filter banks in subband coding systems. Expand
Speech dereverberation via maximum-kurtosis subband adaptive filtering
TLDR
An efficient algorithm for high-quality speech capture in applications such as hands-free teleconferencing or voice recording by personal computers using a modulated complex lapped transform (MCLT), in which the subband filters are adapted to maximize the kurtosis of the linear prediction residual of the reconstructed speech. Expand
...
1
2
3
4
5
...