Television – Synchronization
Reexamination Certificate
2005-10-12
2009-10-13
Hsia, Sherrie (Department: 2622)
Television
Synchronization
C348S521000, C348S725000
Reexamination Certificate
active
07602444
ABSTRACT:
A synchronization signal detection circuit and method of a digital TV (DTV) receiver are provided. The synchronization signal detection circuit determines a precise main path by determining powers in consideration of the influence of multiple paths near signals located at a peak value location and guarantees a stable operation of an equalizer by using error values output from a decoder to generate a synchronization locking control signal. A power signal based on the correlation of the received signal with a PN511 sequence is filtered to compensate for a dynamic multipath distortion (e.g., due to other multipath signals near signals located at a peak value location). The magnitude of the filtered power signal is then compared (e.g., with a predetermined threshold value) to determine the position of the main path (e.g., at the peak value location, or at a pre or post multipath signal location).
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Cheon Jong-hwan
Jeon Hyun-Bae
F. Chau & Associates LLC
Hsia Sherrie
Samsung Electronics Co,. Ltd.
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