Coded data generation or conversion – Digital code to digital code converters – Data rate conversion
Patent
1996-09-23
1998-03-17
Young, Brian K.
Coded data generation or conversion
Digital code to digital code converters
Data rate conversion
H03M 700
Patent
active
057292256
ABSTRACT:
An asynchronous digital mixer (20) receives digitally sampled audio signal data at different unrelated asynchronous sampling rates. The audio data is then edge synchronized and mixed using a summing element (28) and an oversampled sigma delta digital modulator (42), where a single bit output of the digital modulator (42) can be output as an analog signal with the use of a smoothing filter (46), or further decimated using a digital decimation filter (44) for storage on a digital media. Additionally, analog audio signals can be converted and mixed digitally within the system using an analog interface (35) without having to decimate and filter each analog input signal individually.
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Analog Devices, Inc., "Serial-Port 16-Bit SoundComm Codec AD1843," 1996, pp. 1-11.
Analog Devices, Inc. et al., "Audio Codec '97 Component Specification, Revision 1.02," May 28, 1996, pp. 1-48.
Hill Daniel D.
Larson J. Gustav
Motorola Inc.
Young Brian K.
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