Audio spatial environment engine using a single fine structure
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United States of America Patent
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Issued Date -
Sep 27, 2007
app pub date -
Feb 12, 2007
filing date -
Feb 14, 2006
priority date (Note) -
Abandoned
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Abstract
A system for compensating for signal fade in a frequency-modulated transmission system is provided, such as for use in terrestrial frequency modulated receivers. The system includes a time domain to frequency domain conversion stage receiving M channels of audio data and generating a plurality of sub-bands of audio spatial image data. A sub-band vector calculation system receives the M channels of the plurality of sub-bands of audio spatial image data and generates image map data. A summation stage receives the M channels of the plurality of sub-bands of audio spatial image data and adds each of the corresponding sub-bands for each of the M channels to form a plurality of sub-band fine structures. A filter stage receives the plurality of sub-band fine structures and the image map data and multiplies the sub-band fine structures by a predetermined gain based on the image map data.
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