Coded data generation or conversion – Analog to or from digital conversion – Increasing converter resolution
Reexamination Certificate
2006-06-03
2009-12-15
Nguyen, Linh V (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Increasing converter resolution
C341S139000, C341S144000, C341S185000
Reexamination Certificate
active
07633417
ABSTRACT:
A device is described herein that performs a digital-to-analog conversion on a digital multimedia signal in a manner that enhances the human perceptual quality of the resulting analog multimedia signal (e.g., musical passage). In one embodiment, the device operates as follows: (1) divides the bitstream of a digital multimedia signal into several distinct multimedia bitstreams; (2) applies the most effective signal processing (filtering and noise shaping) to each distinct multimedia bitstream; (3) performs the most appropriate digital-to-analog conversion (using a multi-bit DAC, a bitstream DAC, a over-sampled bitstream DAC, or a hybrid of these DACs) to each distinct multimedia bitstream; and (4) combines all of the analog multimedia signals which are outputted by the DACs into a single analog multimedia signal.
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Alcatel Lucent
Nguyen Linh V
The Capitol Patent & Trademark Law Firm, PLLC
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