Circuit for carrying out digital Nyquist filtering of IF interme

Details Circuit for carrying out digital Nyquist filtering of IF interme Circuit for carrying out digital Nyquist filtering of IF interme

1996-12-10

1999-10-05

Faile, Andrew I.

Television

Receiver circuitry

455213, 455306, 455424, 364724011, 375350, 375229, H04N 544

Patent

active

059632739

ABSTRACT:
The circuit for the digital filtering of IF intermediate frequency video signals comprises an A/D (analog/digital) converter and a Nyquist filter (N); an analog prefilter, suitable for selecting the desired channel, is placed upstream of the A/D converter. The Nyquist filter (N) is a digital filter placed downstream of the A/D converter, composed of two IIR filters (15, 16) placed in cascade, one (16) of these IIR filters being produced in non-causal form with spectrum conjugate to the other IIR filter (15) produced in causal form, and of an FIR filter (17) in series, for correcting the IIR filters.

REFERENCES:
patent: 4594607 (1986-06-01), Lewis, Jr. et al.
patent: 4751663 (1988-06-01), Yamazaki
patent: 4789897 (1988-12-01), Kappeler et al.
patent: 5089981 (1992-02-01), Cabot
patent: 5331416 (1994-07-01), Patel et al.
patent: 5337091 (1994-08-01), Harford et al.
patent: 5432723 (1995-07-01), Chen et al.
patent: 5568202 (1996-10-01), Koo
patent: 5694422 (1997-12-01), Kaku
patent: 5737254 (1998-04-01), Lane et al.
patent: 5737327 (1998-04-01), Ling et al.

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