Data processing: generic control systems or specific application – Specific application – apparatus or process – Digital audio data processing system
Reexamination Certificate
2007-02-06
2007-02-06
Chin, Vivian (Department: 2615)
Data processing: generic control systems or specific application
Specific application, apparatus or process
Digital audio data processing system
Reexamination Certificate
active
09190208
ABSTRACT:
A high quality digital 3D sound rendering is implemented using high resolution interaural time delays formed from two delay lines: a first delay line providing a rough estimate of the desired interaural time delay for a particular audio sample, and a second delay line in series with the first delay line providing a more finely resolved fractional delay. In the disclosed embodiment, the first delay module, i.e., the integer delay module, is formed from a first-in, first-out (FIFO) buffer with appropriate selection control of a desired sample as it passes through the FIFO buffer with each clock cycle based on the sampling rate. The second delay module (i.e., the fractional delay module) is formed from a plurality of polyphase (FIR) filters. The number of polyphase filters is determined based on the desired resolution of the interaural time delay.
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Chen Jiashu
Wendt Christopher Anton
Agere Systems Inc.
Chin Vivian
Lao Lun-See
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