WO2008146454A1 - 文字放送受信回路 - Google Patents

文字放送受信回路 Download PDF

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Publication number
WO2008146454A1
WO2008146454A1 PCT/JP2008/001203 JP2008001203W WO2008146454A1 WO 2008146454 A1 WO2008146454 A1 WO 2008146454A1 JP 2008001203 W JP2008001203 W JP 2008001203W WO 2008146454 A1 WO2008146454 A1 WO 2008146454A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit
signal
teletext broadcast
frequency characteristic
output
Prior art date
Application number
PCT/JP2008/001203
Other languages
English (en)
French (fr)
Inventor
Kazuya Miyashita
Keiichi Kuzumoto
Original Assignee
Panasonic Corporation
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 Panasonic Corporation filed Critical Panasonic Corporation
Priority to US12/307,683 priority Critical patent/US20090237558A1/en
Priority to EP08751721A priority patent/EP2046030A1/en
Priority to JP2008541529A priority patent/JP4902886B2/ja
Publication of WO2008146454A1 publication Critical patent/WO2008146454A1/ja

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

　コンポジット信号をデジタル化したデジタル入力信号から、文字放送基準信号の周波数成分を抜き取るバンドパスフィルタ（131）を、周波数特性向上回路（130）に設ける。周波数特性向上回路（130）の出力の、文字放送基準信号の期間における最大値と最小値、及び現在の水平同期区間から次の水平同期区間における最大値と最小値に基づいてコンポジット信号の状態を判別する判別回路（145）を、スライス回路（140）に設ける。そして、周波数特性向上回路（130）によって、判別回路（145）の判別結果に応じて選択した、バンドパスフィルタ（131）の出力、及びデジタル入力信号の何れかに基づいてスライス回路（140）へ出力する信号を生成する。
PCT/JP2008/001203 2007-05-28 2008-05-14 文字放送受信回路 WO2008146454A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US12/307,683 US20090237558A1 (en) 2007-05-28 2008-05-14 Teletext receiving circuit
EP08751721A EP2046030A1 (en) 2007-05-28 2008-05-14 Teletext broadcast transmission/reception circuit
JP2008541529A JP4902886B2 (ja) 2007-05-28 2008-05-14 文字放送受信回路および文字放送受信方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-140887 2007-05-28
JP2007140887 2007-05-28

Publications (1)

Publication Number Publication Date
WO2008146454A1 true WO2008146454A1 (ja) 2008-12-04

Family

ID=40074732

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/001203 WO2008146454A1 (ja) 2007-05-28 2008-05-14 文字放送受信回路

Country Status (4)

Country Link
US (1) US20090237558A1 (ja)
EP (1) EP2046030A1 (ja)
JP (1) JP4902886B2 (ja)
WO (1) WO2008146454A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8864945B2 (en) 2009-01-28 2014-10-21 Georgia-Pacific Consumer Products Lp Method of making a multi-ply wiper/towel product with cellulosic microfibers

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09182041A (ja) * 1995-12-27 1997-07-11 Toshiba Corp データスライス回路
JP2004040350A (ja) 2002-07-02 2004-02-05 Matsushita Electric Ind Co Ltd データスライス装置、データスライス方法、及び振幅判定値設定方法
JP2005348069A (ja) * 2004-06-02 2005-12-15 Matsushita Electric Ind Co Ltd 著作権信号検出回路

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09182041A (ja) * 1995-12-27 1997-07-11 Toshiba Corp データスライス回路
JP2004040350A (ja) 2002-07-02 2004-02-05 Matsushita Electric Ind Co Ltd データスライス装置、データスライス方法、及び振幅判定値設定方法
JP2005348069A (ja) * 2004-06-02 2005-12-15 Matsushita Electric Ind Co Ltd 著作権信号検出回路

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8864945B2 (en) 2009-01-28 2014-10-21 Georgia-Pacific Consumer Products Lp Method of making a multi-ply wiper/towel product with cellulosic microfibers
US8864944B2 (en) 2009-01-28 2014-10-21 Georgia-Pacific Consumer Products Lp Method of making a wiper/towel product with cellulosic microfibers

Also Published As

Publication number Publication date
EP2046030A1 (en) 2009-04-08
JP4902886B2 (ja) 2012-03-21
JPWO2008146454A1 (ja) 2010-08-19
US20090237558A1 (en) 2009-09-24

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