Time-Varying Time-Frequency Tilings Using Non-Uniform Orthogonal Filterbanks Based on MDCT Analysis/Synthesis and Time Domain Aliasing Reduction

Time Domain Aliasing Reduction (TDAR) is a method to improve the impulse response compactness of non-uniform orthogonal Modified Discrete Cosine Transforms (MDCT). Previously, TDAR was only possible between frames of identical time-frequency tilings, however in this letter we describe a method to ov...

Full description

Saved in:
Bibliographic Details
Published in:IEEE signal processing letters 2019-12, Vol.26 (12), p.1783-1787
Main Authors: Werner, Nils, Edler, Bernd
Format: Article
Language:English
Subjects:
Adaptive filters
Aliasing
Discrete cosine transform
Frequency response
Impulse response
Layout
MDCT
Merging
perceptual coding
Reduction
Regression analysis
Switches
TDAC
TDAR
Time domain analysis
Time-frequency analysis
time-frequency transform
Transforms
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Time Domain Aliasing Reduction (TDAR) is a method to improve the impulse response compactness of non-uniform orthogonal Modified Discrete Cosine Transforms (MDCT). Previously, TDAR was only possible between frames of identical time-frequency tilings, however in this letter we describe a method to overcome this limitation. This method enables the use of TDAR between two consecutive frames of different time-frequency tilings by introducing another subband merging or subband splitting step. Consecutively, this method allows more flexible and adaptive filterbank tilings while retaining compact impulse responses, two attributes needed for efficient perceptual audio coding.
ISSN:1070-9908
1558-2361
DOI:10.1109/LSP.2019.2949433