Arrangement for filtering compressed pulse-code-modulated signal

Details Arrangement for filtering compressed pulse-code-modulated signal Arrangement for filtering compressed pulse-code-modulated signal

1978-12-22

1980-10-28

Smith, Jerry

Boots, shoes, and leggings

370109, 375 26, 375 34, G06F 1531

Patent

active

042311004

ABSTRACT:
Digital filter for filtering nonuniformly quantized pulse code-modulated signals formed by a sequence of code words each comprising a segment number s(i) and a mantissa number m(i). This digital filter comprises a modifying device to which the mantissa numbers m(i) are applied for generating modified mantissa numbers E(i). The numbers E(i) are each multiplied by the magnitude of a filter coefficient, for generating first product numbers z.sub.1 (i). Thereafter these numbers z.sub.1 (i) are each multiplied by a number 2.sup.B(i), B(i) being either equal to s(i) or equal to s(i)-1, so that second product numbers z.sub.2 (i) are obtained which are applied to an accumulator.

REFERENCES:
patent: 3752970 (1973-08-01), Aaron et al.
patent: 3766546 (1973-10-01), Aaron et al.
patent: 3988606 (1976-10-01), Eggermont
patent: 3992616 (1976-11-01), Acker
patent: 4125866 (1978-11-01), Van Essen et al.

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