Reference : Novel Two-Bit Adaptive Delta Modulation Algorithms
Scientific journals : Article
Engineering, computing & technology : Computer science
http://hdl.handle.net/10993/41010
Novel Two-Bit Adaptive Delta Modulation Algorithms
English
Peric, Zoran mailto [University of Nis > Faculty of Electronic Engineering]
Denic, Bojan mailto [University of Nis > Faculty of Electronic Engineering]
Despotovic, Vladimir mailto [University of Belgrade > Technical Faculty in Bor]
May-2019
Informatica
Lithuanian Academy of Sciences
30
1
117-134
Yes (verified by ORBilu)
International
0868-4952
1822-8844
Lithuania
[en] Delta modulation ; Predictive coding ; speech coding ; Signal to noise ratio ; Laplacian source
[en] This paper introduces two novel algorithms for the 2-bit adaptive delta modulation, namely 2-bit hybrid adaptive delta modulation and 2-bit optimal adaptive delta modulation. In 2-bit hybrid adaptive delta modulation, the adaptation is performed both at the frame level and the sample level, where the estimated variance is used to determine the initial quantization step size. In the latter algorithm, the estimated variance is used to scale the quantizer codebook optimally designed assuming Laplace distribution of the input signal. The algorithms are tested using speech signal and compared to constant factor delta modulation, continuously variable slope delta modulation and instantaneously adaptive 2-bit delta modulation, showing that the proposed algorithms offer higher performance and significantly wider dynamic range.
Ministry of Education and Science of the Republic of Serbia
http://hdl.handle.net/10993/41010
10.15388/Informatica.2019.200
https://content.iospress.com/articles/informatica/inf1206

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