Coded data generation or conversion – Digital code to digital code converters – Data rate conversion
Reexamination Certificate
2008-10-13
2010-12-14
Lauture, Joseph (Department: 2819)
Coded data generation or conversion
Digital code to digital code converters
Data rate conversion
C712S036000
Reexamination Certificate
active
07852239
ABSTRACT:
One or more circuits in a mobile phone may be utilized for up sampling two or more audio signals to a same data sampling rate. Each audio signal, such as digital audio, voice, and polyringer, for example, may be received at one of a plurality of data sampling rates and one or more of the following wireless standards: WCDMA, HSDPA, GSM, GPRS, EDGE, and/or Bluetooth. Audio signals may be equalized and/or compensated with an FIR filter before up sampling or with an IIR filter to reduce overall processing latency. Multiple half-band interpolation operations may perform the up sampling. The first half-band filter may be replaced by an IIR filter to reduce overall processing latency. A gain of the up-sampled data may be adjusted to reduce noise effects. The channels of the up-sampled audio signals may be mixed and later further up sampled for subsequent communication to an output device.
REFERENCES:
patent: 6055619 (2000-04-01), North et al.
patent: 2005/0278044 (2005-12-01), Chen et al.
patent: 2008/0037151 (2008-02-01), Fujimoto et al.
patent: WO 2005/098854 (2005-10-01), None
Chang Li Fung
Cheng Taiya
Hayek Claude
Kong Hongwei
Sollenberger Nelson
Broadcom Corporation
Lauture Joseph
McAndrews Held & Malloy Ltd.
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