Method and apparatus for digital mixing of audio signals in mult

Electrical audio signal processing systems and devices – With mixer

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H04B 100

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active

056470088

ABSTRACT:
A multimedia method and apparatus is able to digitally mix audio signals to produce combined audio output signals. Prior to digital mixing, the audio input signals are de-formatted using a digital de-formatter, volume adjusted using digital volume controllers and converted to a common sampling rate utilizing a digital interpolator or decimator.

REFERENCES:
patent: 4360707 (1982-11-01), Joseph et al.
patent: 5402499 (1995-03-01), Robinson et al.
patent: 5487067 (1996-01-01), Matsushige
Crochiere, Ronald E. and Rabiner, Lawrence R., "Interpolation and Decimation of Digital Signals", Proceedings of the IEEE, vol. 69, No. 3, pp. 300-331, Mar., 1981.
Analog Devices "SamplePort Stereo Asynchronous Same Rate Converters" AD1890/AD1891, Rev. 0, pp. 1-20, Jul. 1993.

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