WO2001050747A3 - System and method of adaptive timing estimation for horizontal overscan data - Google Patents

System and method of adaptive timing estimation for horizontal overscan data Download PDF

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Publication number
WO2001050747A3
WO2001050747A3 PCT/US2000/034720 US0034720W WO0150747A3 WO 2001050747 A3 WO2001050747 A3 WO 2001050747A3 US 0034720 W US0034720 W US 0034720W WO 0150747 A3 WO0150747 A3 WO 0150747A3
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WO
WIPO (PCT)
Prior art keywords
data encoding
adaptive timing
video signal
sub
data
Prior art date
Application number
PCT/US2000/034720
Other languages
French (fr)
Other versions
WO2001050747A2 (en
Inventor
Craig Ranta
Original Assignee
Microsoft Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Microsoft Corp filed Critical Microsoft Corp
Priority to AU24453/01A priority Critical patent/AU2445301A/en
Publication of WO2001050747A2 publication Critical patent/WO2001050747A2/en
Publication of WO2001050747A3 publication Critical patent/WO2001050747A3/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/084—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the horizontal blanking interval only
    • H04N7/085—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the horizontal blanking interval only the inserted signal being digital
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/025—Systems for the transmission of digital non-picture data, e.g. of text during the active part of a television frame
    • H04N7/035—Circuits for the digital non-picture data signal, e.g. for slicing of the data signal, for regeneration of the data-clock signal, for error detection or correction of the data signal

Abstract

The adaptive timing module is configured for recovering data encoded in a field of a video signal, and further configured for counteracting horizontal phase or picture shift. An adaptive timing processor defines a timing window where the expected prescan portion video signal is expected to be in an encoded video signal. The timing window is divided into sub-portions with a set of sampling points. The adaptive timing processor conducts a sweeping operation over each sub-portion of the prescan portion of the encoded video signal for the presence of a pre-data encoding zone. When a pre-data encoding zone is detected, the adaptive timing processor stores the position of the sub-portion with the pre-data encoding zone, or sets a flag to indicate the presence of a pre-data encoding zone for that particular sub-portion in a particular field. After scanning one or more fields for the presence of a pre-data encoding zone, the adaptive timing processor uses the stored positions of pre-data encoding zones, or uses the flags indicating the pre-data encoding zones to determine a selected sampling point. The adaptive timing processor uses the selected sampling point to lock on to a location for decoding subsequent data in the encoded video signal.
PCT/US2000/034720 1999-12-30 2000-12-20 System and method of adaptive timing estimation for horizontal overscan data WO2001050747A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU24453/01A AU2445301A (en) 1999-12-30 2000-12-20 System and method of adaptive timing estimation for horizontal overscan data

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/476,177 US6704058B2 (en) 1999-12-30 1999-12-30 System and method of adaptive timing estimation for horizontal overscan data
US09/476,177 1999-12-30

Publications (2)

Publication Number Publication Date
WO2001050747A2 WO2001050747A2 (en) 2001-07-12
WO2001050747A3 true WO2001050747A3 (en) 2002-02-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/034720 WO2001050747A2 (en) 1999-12-30 2000-12-20 System and method of adaptive timing estimation for horizontal overscan data

Country Status (4)

Country Link
US (1) US6704058B2 (en)
AU (1) AU2445301A (en)
TW (1) TW532038B (en)
WO (1) WO2001050747A2 (en)

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Also Published As

Publication number Publication date
US6704058B2 (en) 2004-03-09
TW532038B (en) 2003-05-11
US20030169367A1 (en) 2003-09-11
AU2445301A (en) 2001-07-16
WO2001050747A2 (en) 2001-07-12

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