Sample rate converter and sample rate conversion method

Television – Format conversion

Patent

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Details

364727, H04N 701

Patent

active

056192703

ABSTRACT:
The invention is a sample rate converter, which converts input sample values of a signal digitized with a first predetermined clock frequency into desired sample values at a second virtual sample frequency, with a delay device, which delays the serial input sample values and outputs in parallel a block of delayed input sample values z.sup.-2 to z.sup.+2, a computing device, with a WHT stage, which transforms the delayed input sample values (z.sup.-2 to z.sup.+2), by using a Walsh-Hadamard transformation, into the WHT domain, and an interpolating device, which interpolates in equally weighted manner the resulting WHT coefficients and performs an amplitude correction of the interpolation results.

REFERENCES:
patent: 4055756 (1977-10-01), Jolivet
patent: 4549212 (1985-10-01), Bayer
patent: 4663595 (1987-05-01), Mehrgardt et al.
patent: 4862271 (1989-08-01), Smith et al.
patent: 5513120 (1996-04-01), Berlad

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