Method and apparatus for sample rate conversion

Details Method and apparatus for sample rate conversion Method and apparatus for sample rate conversion

1997-05-05

1999-07-27

Mai, Tan V.

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

708314, G06F 1717, G06F 1710

Patent

active

059283130

ABSTRACT:
An improved apparatus and method for performing sample rate conversion of digital sample values is disclosed. The sample rate conversion utilizes a finite impulse response filter that substantially eliminates the introduction of phase errors that plague conventional approaches. The computations required to implement the finite impulse response filter are provided in a hardware implementation that is efficiently constructed and utilized so as to be practical to implement in hardware as well as being fast enough to process the incoming samples in essentially real time. The digital sample values being processed by the invention can, for example, be audio, video or graphics related digital sample values. The sample rate conversion is suitable for scaling the size of the images (graphical or video) along one or more axes, or for time compression or expansion of an audio streaming rate.

REFERENCES:
patent: 5335194 (1994-08-01), Clayton et al.
patent: 5528527 (1996-06-01), Iwata
patent: 5621404 (1997-04-01), Heiss et al.

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