Modified BTC Algorithm for Audio Signal Coding

Perceptual Coding of Audio Using Signal - AdaptiveFilterbanks

This thesis studies the application of signal-adaptive lter banks in perceptual coding of audio with an emphasis on Wavelet Filter Banks (WFB). It provides an overview of perceptual coding of audio, the motivating psychoacoustic principles, transforms and wavelet theory. Additionally, di erent existing wavelets-based audio coding schemes are presented. The aim of most of the schemes is to overc...

Sparse signal compaction for lossless audio coding: integrated approach

We investigate sparsifying procedures to increase compactness of approximated information models and codability of the signals understood as a means of communication. Information is defined as communicated message with semantic content dependent on formally defined physical nature reflecting acquisition procedure. Lossless audio coding is representative example of useful application that requir...

Bandwidth Extension with Hybrid Signal Extrapolation for Audio Coding

In this paper, we propose a blind method using hybrid signal extrapolation at the decoder to regenerate lost high-frequency components which are removed by encoders. At first, a decoded signal spectral resolution is enhanced by time domain linear predictive extrapolation and then the cut off frequency of each frame is estimated to avoid the spectrum gap between the end of original low frequency...

Modified spatial audio object coding scheme with harmonic extraction and elimination structure for interactive audio service

An interactive audio service provides audio editing functionality to users. In the service, the users can control the wanted audio objects to make their own audio sound using a spatial audio object coding (SAOC) scheme. However, the vocal object cannot be removed perfectly from the down-mix signal in Karaoke mode of the SAOC. Thus, in this paper, a modified SAOC scheme with harmonic extraction ...

Orchestra/Percussion Classification Algorithm for United Speech Audio Coding System