CUED Publications database

Non-linear down-sampling and signal reconstruction, without folding

Kabir, HMD and Alam, SB and Azam, MI and Hussain, MA and Rafl Sazzad, ABM and Sakib, MN and Matin, MA (2010) Non-linear down-sampling and signal reconstruction, without folding. In: UNSPECIFIED pp. 142-146..

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Abstract

This paper presents a theory of 1.5 factor nonlinear down-sampling, reconstruction and noise elimination. For linear down sampling of two or three factor, one sample is taken and next one or two samples are not taken/discarded. Here in non-linear down sampling two or three samples are taken and the next one is not taken. The purpose of this nonlinear down sampling is to send less data samples in voice communication. Though one sample is discarded after taking two samples value of this sample can be reconstructed from values of other samples. Here, two samples are at original sampling period, T interval and next two samples are at 2T interval. High-frequency sharp changes were extracted when sampled at T interval. From received signal, discarded sample can be reconstructed from nearby four samples (Previous two and next two). When original signal contains higher frequency some error signal is introduced, after reconstruction. This error signal depends on original signal. Error signal is eliminated using original signal. Down-sampling is performed after sampling and signal reconstruction is performed just before hearing the sound. © 2010 IEEE. s s s

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: UNSPECIFIED
Divisions: Div A > Energy
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:07
Last Modified: 13 Apr 2021 07:14
DOI: 10.1109/EMS.2010.34