Data processing: generic control systems or specific application – Specific application – apparatus or process – Digital audio data processing system
Reexamination Certificate
2011-05-24
2011-05-24
Kuntz, Curtis (Department: 2614)
Data processing: generic control systems or specific application
Specific application, apparatus or process
Digital audio data processing system
C381S104000, C455S241100
Reexamination Certificate
active
07949419
ABSTRACT:
Methods and systems for processing audio signals are disclosed herein. Aspects of the method may comprise controlling gain during multipath, multi-rate audio processing by generating via a digital gain circuit, a digital signal that is a product of an input digital signal and a gain coefficient derived from a lookup table, and bit-shifted to generate a digital output signal. The gain coefficient may be partitioned into a number of gain blocks. The gain values in each of the gain blocks may be twice a corresponding value in each preceding gain block. The gain blocks may be partitioned into steps that represent particular gain values within a range associated with the gain block. The digital output signal may be ramped utilizing a linear interpolation of the gain coefficients one step apart over a number of samples of the digital input signal, where the number of samples is given as a power of two.
REFERENCES:
patent: 5260704 (1993-11-01), Hustig et al.
patent: 6353364 (2002-03-01), Klemmer
patent: 6751177 (2004-06-01), Abe et al.
patent: 2003/0083031 (2003-05-01), Eriksson et al.
patent: 2006/0222118 (2006-10-01), Murthy et al.
Chang Li Fung
Kong Hongwei
Sollenberger Nelson
Broadcom Corporation
Elbin Jesse A
Kuntz Curtis
McAndrews Held & Malloy Ltd.
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