High definition television acoustic charge transport filter bank

Details High definition television acoustic charge transport filter bank High definition television acoustic charge transport filter bank

1989-10-23

1991-07-16

Shepperd, John W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358133, 358 12, H04N 700, H04N 712

Patent

active

050329081

ABSTRACT:
A high definition television acoustic charge transport filter bank significantly lowers the amount of digital processing needed in a high definition television. The filter bank effects frequency shifting by undersampling input waveforms to create aliasing, and by sampling output waveforms to shift received signals up in frequency. The filter bank is highly accurate and inexpensive because of the simple acoustic charge transport filter structure, high charge transport efficiency, linear phase and sample data operation.

REFERENCES:
patent: 2686831 (1954-08-01), Dome
patent: 4068258 (1978-01-01), Bied-Charreton et al.
patent: 4633285 (1986-12-01), Hunsinger et al.
IEEE Trans. on Acoustics, Speech and Signal Processing; "Quadrature Mirror Filter Design for an Arbitrary Number of Equal Bandwidth Channels", by Chu; vol. ASSP-33, No. 1, Feb. 1985, pp. 203-218.
"Channel Compatible 6-MHz HDTV Distribution Systems", by Schreiber et al.; SMPTE Journal, Jan. 1989, pp. 5-13.

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