Sample rate converter and sample rate conversion method

Details Sample rate converter and sample rate conversion method Sample rate converter and sample rate conversion method

H - Electricity

04

N

H04N 7/01 (2006.01) H03H 17/06 (2006.01) H04N 5/14 (2006.01) H04N 5/46 (2006.01)

Patent

CA 2152658

The invention proposes 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 means (53-56), which delays the serial input sample values and outputs in parallel a block of delayed input sample values z- 2 to z+ 2, a computing means (31,32) with a WHT stage, which transforms the delayed input sample values (z-2 to z+2) by means of a WalshHadamard transformation into the WHT domain, and an interpolating device (34,37), which interpolates in equally weighted manner the resulting WHT coefficients and performs an amplitude correction of the interpolation results.

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