Digital filtration with use of synthetic DPCM

Author

Pogribny, Wlodzimierz ; Marciniak, Beata ; Marciniak, Tomasz

Author_Institution

Inst. of Telecommun., Univ. of Technol. & Agric., Bydgoszcz, Poland

fYear

2005

fDate

15-17 Sept. 2005

Firstpage

430

Lastpage

433

Abstract

High resolution and speed of filtration can be obtained by the use of mixed formats in digital filters. In these formats the input signal is represented in delta modulation (DM) format whereas weight factors of pulse response are in the pulse code modulation (PCM) format. In this paper we suggest to synthesize codes of differential PCM (DPCM) from a few modernized DPCM (MDPCM) codes. The MDPCM quantization steps (codes) are proportional to natural powers of 2. Such approach allows to replace the multiplication with an operation of shift of bits only. Aim of this work is to increase the resolution and at the same time the fast-acting of filtration in mixed format synthesized DPCM along with PCM format (SDPCM-PCM) and suggest suitable structures of specialized processors.

Keywords

delta modulation; digital filters; pulse code modulation; quantisation (signal); delta modulation format; digital filtration; modernized DPCM; pulse code modulation; synthetic DPCM; Convolution; Delta modulation; Digital filters; Filtration; Modulation coding; Phase change materials; Pulse modulation; Signal processing algorithms; Signal resolution; Signal synthesis;

fLanguage

English

Publisher

ieee

Conference_Titel

Image and Signal Processing and Analysis, 2005. ISPA 2005. Proceedings of the 4th International Symposium on

ISSN

1845-5921

Print_ISBN

953-184-089-X

Type

conf

DOI

10.1109/ISPA.2005.195450

Filename

1521329