Apparatus for the conversion of analog audio signals to a digita

Details Apparatus for the conversion of analog audio signals to a digita Apparatus for the conversion of analog audio signals to a digita

1995-06-14

1997-02-04

Williams, Howard L.

Coded data generation or conversion

Analog to or from digital conversion

Nonlinear

341118, 341120, H03M 110, H03M 106

Patent

active

056003170

ABSTRACT:
This invention relates to a circuit for converting an analog audio signal to a highly resolving bit stream. An audio signal (U.sub.In) is converted on several parallel paths (1, 2) having different amplitude sensitivities into a data stream, where the offset of the individual paths (1, 2) is compensated for individually. Subsequently the amplification difference produced by the different amplitude sensitivities is determined and compensated for, so that one of the two data streams is made available as a bit stream for further processing. The selection of the data stream which is made available as a bit stream for further processing, is determined based on the amplitude of the audio signal (U.sub.In). Each of two parallel paths (1, 2) has three steps (21, 28, 66; 11, 12, 13), which are connected in series, and the conversion of the audio signal in the bit stream by an analog/digital converter (26, 14) takes place in the two first steps (21, 11), and an A/D converter (26) is connected in series with one of the two steps of an amplifier (22), and the error compensation is carried out in the second and third steps (28, 55; 12, 13) of the two parallel paths.

REFERENCES:
patent: 3790947 (1974-02-01), Campbell et al.
patent: 4129864 (1978-12-01), Carpenter et al.
patent: 4943807 (1990-07-01), Early et al.
patent: 4999628 (1991-03-01), Kakubo et al.
patent: 5093660 (1992-03-01), Beauducel
patent: 5146223 (1992-09-01), Muto
patent: 5250948 (1993-10-01), Berstein

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