Apparatus for sample rate conversion

Details Apparatus for sample rate conversion Apparatus for sample rate conversion

1994-06-07

1997-04-15

Chin, Wellington

Electrical audio signal processing systems and devices

With mixer

84625, 84660, G11B 27031, G10L 302, G10F 108

Patent

active

056218052

ABSTRACT:
An apparatus and method for digital mixing and sample rate conversion in a computer system is disclosed. The fully digital mixer of the present invention comprises: 1) a digital input receiver for receiving a plurality of digital data input signals and a corresponding plurality of input clock signals. The digital input receiver also receives an output clock signal. The digital input receiver further includes a data rate converter for converting the plurality of digital data input signals to a sampling rate corresponding to the output clock signal. The data rate converter produces a plurality of converted digital data output signals; 2) a digital filter unit coupled to the digital input receiver. The digital filter unit includes a plurality of digital filters for filtering the plurality of converted digital data output signals to produce a plurality of filtered digital data output signals; and 3) a digital blending unit coupled to the digital filter unit. The digital blending unit includes logic for combining the plurality of filtered digital data output signals to produce a mixed digital output signal.

REFERENCES:
patent: 5159453 (1992-10-01), Dhein et al.
patent: 5231240 (1993-07-01), Lu
patent: 5392284 (1995-02-01), Sugiyama
patent: 5402499 (1995-03-01), Robison et al.

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