Code converting method and system

Details Code converting method and system Code converting method and system

1978-09-19

1980-06-24

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

H04L 300

Patent

active

042097711

ABSTRACT:
A code converting method in which a multivalue signal x.sub.i sampled at a sampling period of mT, where m (an even number) equals 2.sup.n (n being integer) and x.sub.i is non-negative integer not greater than m, is received and subjected to density conversion to be delivered out in the form of a train of m binary signals sampled at a sampling period of T. A Z-transform Y(Z) of the binary signal to be delivered out is expressed as, ##EQU1## where q.sub.i+1 .ident.q.sub.i +X.sub.i+1 +m, and mod 2; q.sub.o =0 and where H(x.sub.i, q.sub.i, Z) represents a polynomial of the order related to Z.sup.-1 not greater than (m-1) which has non-zero terms having each a coefficient of 1(one) and which satisfies H(k, q.sub.i, 1)=k, H(k, q.sub.i, Z)=Z.sup.-(m-1) H(k,q.sub.i,1/Z) and H(k,0,Z)=H(k,1,Z) for k being an even number, and H(k,0,Z)=Z.sup.-(m-1) H(k,1,1/Z) for k being an odd number.

REFERENCES:
patent: 2700696 (1955-01-01), Barker
patent: 3133280 (1964-05-01), Crater
patent: 3214749 (1965-10-01), Karnaugh
patent: 3226685 (1965-12-01), Potter
patent: 3623078 (1971-11-01), Whiting
patent: 4020282 (1977-04-01), Halpern
Weller "IEEE Trans., Com. Tech.", vol. Com-19, Dec. 1971, pp. 1064-1069.

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