HDTV Sub-band coding using IIR filter bank

Details HDTV Sub-band coding using IIR filter bank HDTV Sub-band coding using IIR filter bank

1989-03-14

1990-04-17

Peng, John K.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358138, 3647241, H04N 712

Patent

active

049185241

ABSTRACT:
A technique for the sub-band decomposition and reconstruction of video signals is disclosed. In an illustrative embodiment of the present invention, each field of a video signal is decomposed into sub-bands utilizing a polyphase filter bank unit including an infinite impulse response allpass filter with coefficients that are powers of two. To reconstruct the original image, an FIR is utilized which approximates an IIR allpass filter This eliminates the need for a full field memory in the reconstruction process.

REFERENCES:
patent: 4542475 (1985-09-01), Acampora
patent: 4815023 (1989-03-01), Arbeiter
patent: 4829367 (1989-05-01), Dubois et al.
patent: 4829378 (1989-05-01), LeGall
"Digital Coding of Speech in Sub-bands," R. E. Crochiere et al., The Bell System Technical Journal, vol. 55, No, 8, pp 1069-1085, Oct. 1976.
"Sub-band Coding of Images," J. W. Woods et al., IEEE Trans. on Acoust., Speech, Signal Processing, vol. ASSP-34, No. 5, pp. 1278-1288, Oct. 1986.
"Multi-Dimensioned Sub-Band Coding: Some Theory and Algorithms," M. Vetterli, Signal Processing, vol. 6, pp. 97-112, Apr. 1988.
"Sub-Band Coding of Images Using Predicture Vector Quantization," P. H. Westerink et al., IEEE International Conf. on Acoust., Speech, Signal Processing, ICASS 87, pp. 1378-1381, Dallas, Apr. 1987.
"Sub-band Coding of Digital Images Using Symmetric Short Kernel Filters and Arithmetic Coding Techniques," D. LeGall et al., PROC IEEE Int. Conf. on Acoust., Speech, Signal Processing, pp. 761-763, Apr. 1988.
"Two Dimensional IIR Filters for Exact Reconstruction in Tree-Structured Sub-Band Decomposition," R. Ansari et al., Electronic Letters, vol. 23, pp. 633-634, Jun. 1987.
"IIR Filter Bank for Sub-band Coding of Images," T. A. Ramstad, ISCAS '88, pp. 827-830.

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