Invention Grant
- Patent Title: SECAM line identification and PAL switch
- Patent Title (中): SECAM线路识别和PAL开关
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Application No.: US12759669Application Date: 2010-04-13
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Publication No.: US08212923B2Publication Date: 2012-07-03
- Inventor: Yongru Gu
- Applicant: Yongru Gu
- Applicant Address: US CA Lake Forest
- Assignee: Newport Media, Inc.
- Current Assignee: Newport Media, Inc.
- Current Assignee Address: US CA Lake Forest
- Agency: Rahman LLC
- Main IPC: H04N9/47
- IPC: H04N9/47 ; H04N9/465

Abstract:
SECAM line identification in an analog television includes an accumulator that accumulates a FM demodulated output corresponding to a color reference tone for each SECAM line; a first leakage average filter receiving a first result from the accumulator; a second leakage average filter receiving a second result from the accumulator; and a line decision block comparing the first result and the second result. An apparatus for soft-decision based PAL switch detection in an analog television includes a burst locked oscillator (BLO) receiving a composite video signal as input and producing an instantaneous PAL switch signal for each line; a leakage average filter receiving the PAL switch signal and filtering noise from an output received from the BLO; and a switch detection block receiving a filtered output from the leakage average filter, and making a decision based on a sign of the filtered output of the leakage average filter.
Public/Granted literature
- US20110249182A1 SECAM Line Identification and PAL Switch Public/Granted day:2011-10-13
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