Low delay modulated filter bank
P Ekstrand - US Patent 8,880,572, 2014 - Google Patents
The document relates to modulated sub-sampled digital filter banks, as well as to methods
and systems for the design of Such filter banks. In particular, the present document proposes …
and systems for the design of Such filter banks. In particular, the present document proposes …
Complex exponential modulated filter bank for high frequency reconstruction or parametric stereo
P Ekstrand - US Patent 9,715,881, 2017 - Google Patents
An apparatus and method are disclosed for filtering and performing high frequency
reconstruction of an audio sig nal. The apparatus includes an analysis filter bank, a phase …
reconstruction of an audio sig nal. The apparatus includes an analysis filter bank, a phase …
Oversampled DFT-modulated biorthogonal filter banks: Perfect reconstruction designs and multiplierless approximations
WA Martins, MRB Shankar… - IEEE Transactions on …, 2019 - ieeexplore.ieee.org
We propose a novel methodology for designing oversampled discrete Fourier transform-
modulated uniform filter banks. The analysis prototype is designed as a Nyquist filter …
modulated uniform filter banks. The analysis prototype is designed as a Nyquist filter …
Low delay modulated filter bank
P Ekstrand - US Patent 9,318,118, 2016 - Google Patents
The document relates to modulated sub-sampled digital filter banks, as well as to methods
and systems for the design of Such filter banks. In particular, the present document proposes …
and systems for the design of Such filter banks. In particular, the present document proposes …
Complex-valued filter bank with phase shift for high frequency reconstruction or parametric stereo
P Ekstrand - US Patent 9,779,748, 2017 - Google Patents
Further, a specific design for a 64 channel filter bank using a prototype filter length of 640
coefficients and a system delay of 319 samples is given. The method substantially reduces …
coefficients and a system delay of 319 samples is given. The method substantially reduces …
Complex exponential modulated filter bank for high frequency reconstruction or parametric stereo
P Ekstrand - US Patent 9,743,183, 2017 - Google Patents
An apparatus and method are disclosed for filtering an audio signal are disclosed. The
apparatus includes an analysis filter bank, a high frequency reconstructor or a parametric …
apparatus includes an analysis filter bank, a high frequency reconstructor or a parametric …
Digital filterbank for spectral envelope adjustment
P Ekstrand - US Patent App. 18/452,697, 2024 - Google Patents
An apparatus and method are disclosed for processing an audio signal. The apparatus
includes an input interface, a digital filterbank having an analysis part and a synthesis part, a …
includes an input interface, a digital filterbank having an analysis part and a synthesis part, a …
Digital filterbank for spectral envelope adjustment
P Ekstrand - US Patent 11,735,198, 2023 - Google Patents
An apparatus and method are disclosed for processing an audio signal. The apparatus
includes an input interface, a digital filterbank having an analysis part and a synthesis part, a …
includes an input interface, a digital filterbank having an analysis part and a synthesis part, a …
Digital filterbank for spectral envelope adjustment
P Ekstrand - US Patent 11,107,487, 2021 - Google Patents
An apparatus and method are disclosed for processing an audio signal. The apparatus
includes an input interface, a digital filterbank having an analysis part and a synthesis part, a …
includes an input interface, a digital filterbank having an analysis part and a synthesis part, a …
Digital filterbank for spectral envelope adjustment
P Ekstrand - US Patent 10,460,742, 2019 - Google Patents
An apparatus and method are disclosed for processing an audio signal. The apparatus
includes an input interface, a digital filterbank having an analysis part and a synthesis part, a …
includes an input interface, a digital filterbank having an analysis part and a synthesis part, a …