Signal processing device and signal processing method

Details Signal processing device and signal processing method Signal processing device and signal processing method

2005-06-22

2008-12-23

Jeanglaude, Jean B (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S155000, C341S118000, C341S120000

Reexamination Certificate

active

07468687

ABSTRACT:
A problem is overcome in that when a signal is input and output in an analog signal format between two blocks for executing digital signal processing, a dynamic range is made improper by the dispersion of errors of the signal levels in a D/A converter and an A/D converter in the blocks. A gain is set such that the minimum value within the range of dispersion of errors of the signal level of a D/A converter12of a DSP1in a former stage is made larger than the maximum value within the range of dispersion of errors of the signal level of an A/D converter21in a latter stage. Then, the gain value of a second GCA13is set such that the level of a signal S5is set to a maximum value within the range less than a prescribed value Vdr in a state that a signal having a level treated as a predetermined maximum value in the DSP1is input to the first GCA13. Next, a gain value is set to a second GCA24such that the level of the signal S5is set to a maximum value within the range equal to or less than the prescribed value.

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English Translation of Preliminary Report on Patentability dated Jan. 11, 2007 for International Application No. PCT/JP2005/011879.
PCT International Search Report for PCT/JP2005/011879 mailed on Aug. 16, 2005.

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