DocumentCode :
3039519
Title :
Tunable downsampling using fractional delay filters with applications to digital TV transmission
Author :
Laakso, Timo I. ; Valimäki, Vesa ; Henriksson, Jukka
Author_Institution :
Sch. of Electron. & Manuf. Syst. Eng., Westminster Univ., London, UK
Volume :
2
fYear :
1995
fDate :
9-12 May 1995
Firstpage :
1304
Abstract :
An efficient technique for sampling rate conversion for arbitrary (incommensurate) ratios is proposed. The technique is based on fractional delay filters that are efficient to implement and that can be controlled with a small number of arithmetic operations per output sample. The authors consider an application in digital television (DTV) transmission where, according to present standard proposals, conversions between several incommensurate sampling rates must be possible. Rather than trying to design separate rate fixed filters for each possible conversion, the authors outline a system which may be tuned for any possible downsampling ratio. A sampling rate conversion system based on the straightforward and simple Lagrange interpolation technique is illustrated with a level and highly efficient implementation structure. Various error sources involved are analyzed and a mean-square-error (MSE) type cost function is defined to aid in the system design
Keywords :
delay circuits; digital communication; digital filters; digital television; error analysis; image sampling; interpolation; television; tuning; video signal processing; Lagrange interpolation technique; arithmetic operations; digital TV transmission; downsampling ratio; error sources; fractional delay filters; implementation structure; mean-square-error type cost function; sampling rate conversion; sampling rate conversion system; sampling rates; tunable downsampling; Delay; Digital TV; Digital filters; IIR filters; Interpolation; Lagrangian functions; Nonlinear filters; Proposals; Sampling methods; Satellite broadcasting;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1995. ICASSP-95., 1995 International Conference on
Conference_Location :
Detroit, MI
ISSN :
1520-6149
Print_ISBN :
0-7803-2431-5
Type :
conf
DOI :
10.1109/ICASSP.1995.480479
Filename :
480479
Link To Document :
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