Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Reexamination Certificate
2011-03-22
2011-03-22
Tse, Young T. (Department: 2611)
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
C375S350000
Reexamination Certificate
active
07912153
ABSTRACT:
A system and method are disclosed for performing digital multi-channel decoding of a BTSC composite audio signal. Each subsequent stage of the digital multi-channel decoding process is performed at the lowest sampling rate that yields acceptable performance for that stage. Analog-to-digital conversion of the composite audio signal is performed first to generate a composite digital audio signal. After analog-to-digital conversion, all signal processing may be performed in the digital domain. The composite digital audio signal is digitally filtered to frequency compensate for variations caused by previous stages of processing, including IF demodulation. Digital channel demodulation and filtering are performed to isolate single channels of the composite digital audio signal such as SAP, L−R, and L+R channels. SAP and L−R channels are DBX decoded resulting in corresponding decoded signals using a unique combination of digital filters that are an efficient translation of a corresponding combination of analog filters.
REFERENCES:
patent: 5149902 (1992-09-01), Washiyama
patent: 6118879 (2000-09-01), Hanna
patent: 6192086 (2001-02-01), Darr
patent: 6259482 (2001-07-01), Easley et al.
patent: 2003/0018472 (2003-01-01), Hershkovits et al.
patent: 2005/0262177 (2005-11-01), Jiang et al.
patent: 2007/0078542 (2007-04-01), Alderson
Crochiere Ronald
Lambert Russ
MacInnis Alexander G.
Nhu Hoang
Wu David Chaohua
Broadcom Corp.
McAndrews Held & Malloy Ltd.
Tse Young T.
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