JP2008048452A - プログラムを表すパケット化されたデータストリームを復号化する方法 - Google Patents
プログラムを表すパケット化されたデータストリームを復号化する方法 Download PDFInfo
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- Computer Security & Cryptography (AREA)
- Television Signal Processing For Recording (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
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Abstract
【解決手段】プログラムのデータ内容を再生する際に使用するのに適するPSIを組み込んでいる、プログラムを表すパケット化されたデータストリームが復号化される。データストリーム内のPSIパケットが識別され、そのPSIデータ内のパラメータを使用して、以前のPSIの内容に関わりなく、そのPSIデータがそのプログラムの内容を復号化するために使用されるのかどうかを判定する。PSIの内容にエラー表示がなければ、識別されたPSIデータの内容に関わりなく、現在のPSIは識別されたPSIデータで更新される。PSIの内容にエラー表示があれば、デフォルト・プログラム内容を表すパケットが復号化されたデータストリームの中に組み込まれる。
【選択図】図1
Description
a)プログラム指標またはシステム起動の終了の検出;
b)早送りまたは内容飛ばし(トリック・プレイ)を伴うユーザ・コマンドの検出;または
c)有効なビデオ・パケットが検出されていないことを示す、誤り状態の検出。
Claims (9)
- プログラムのデータ内容を再生する際に使用するプログラム特定情報を組み込んでいる、プログラムを表すパケット化されたデータストリームを復号化する方法であって、
前記データストリームのパケットを、エラーが発生するか否かを判定するために検査するステップと、
現在のプログラム特定情報を使用して、プログラム内容パケットを識別するステップと、
前記検査ステップで前記エラーが発生していないと判定した場合に、前記現在のプログラム特定情報を使用して、前記プログラム内容パケットを、復号化されたデータストリームの中に組み込むステップと、
前記検査ステップで前記エラーが発生していると判定した場合に、デフォルト・プログラム内容を表すパケットを、前記復号化されたデータストリームの中に組み込むステップと、
を含む、前記方法。 - 前記検査するステップで前記エラーが発生していると判定した後に前記データストリーム内のプログラム特定情報データ・パケットを識別するステップと、
前記識別されたプログラム特定情報データで前記現在のプログラム特定情報を更新するステップと、
前記更新された現在のプログラム特定情報を使用して、プログラム内容パケットを識別するステップと、
前記更新された現在のプログラム特定情報を使用して、該更新された現在のプログラム特定情報によって識別された前記プログラム内容パケットを、復号化されたデータストリームの中に組み込むステップと、
をさらに含む、請求項1記載の方法。 - 前記検査ステップが、前記エラーが発生しているか否かを判定するために、前記パケットのヘッダを検査する、請求項1記載の方法。
- 前記パケットがMPEGコンパティブルで且つ前記ヘッダが少なくとも下記のうちの少なくとも1つを含む、請求項3記載の方法、
a)不連続性指標、
b)トランスポート誤り表示、
c)連続性計数値、
d)タイム・スタンプ。 - 前記検査ステップが、下記の条件のうちの一つが発生した場合に前記エラーが発生していると判定する、請求項4記載の方法、
前記不連続性指標が検出されていること、
前記トランスポート誤り表示が検出されていること、
連続するパケット間で前記連続性計数値の不一致があること、
連続するパケット間で前記タイム・スタンプに不連続性があること。 - 前記デフォルト・プログラム内容が所定のビデオ画像を含む、請求項1記載の方法。
- 前記所定のビデオ画像が1フレーム(静止画)を表す、請求項6記載の方法。
- 前記デフォルト・プログラム内容が消音されたオーディオ出力を表す、請求項1記載の方法。
- 前記タイム・スタンプが再生タイム・スタンプおよび復号化タイム・スタンプのうちのひとつである、請求項4記載の方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US1872296P | 1996-05-31 | 1996-05-31 | |
US08/696,292 US5844595A (en) | 1996-05-31 | 1996-08-13 | Decoding of digital data including program specific information |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP54299297A Division JP4550170B2 (ja) | 1996-05-31 | 1997-05-22 | プログラムを表すパケット化されたデータストリームを復号化する方法 |
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JP2008031264A Division JP4646151B2 (ja) | 1996-05-31 | 2008-02-13 | プログラムを表すパケット化されたデータストリームを復号化する方法 |
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Publication Number | Publication Date |
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JP2008048452A true JP2008048452A (ja) | 2008-02-28 |
JP4646148B2 JP4646148B2 (ja) | 2011-03-09 |
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Application Number | Title | Priority Date | Filing Date |
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JP54299297A Expired - Fee Related JP4550170B2 (ja) | 1996-05-31 | 1997-05-22 | プログラムを表すパケット化されたデータストリームを復号化する方法 |
JP2007258382A Expired - Fee Related JP4646148B2 (ja) | 1996-05-31 | 2007-10-02 | プログラムを表すパケット化されたデータストリームを復号化する方法 |
JP2008031264A Expired - Fee Related JP4646151B2 (ja) | 1996-05-31 | 2008-02-13 | プログラムを表すパケット化されたデータストリームを復号化する方法 |
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JP54299297A Expired - Fee Related JP4550170B2 (ja) | 1996-05-31 | 1997-05-22 | プログラムを表すパケット化されたデータストリームを復号化する方法 |
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JP2008031264A Expired - Fee Related JP4646151B2 (ja) | 1996-05-31 | 2008-02-13 | プログラムを表すパケット化されたデータストリームを復号化する方法 |
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US (1) | US5844595A (ja) |
EP (1) | EP0903034B1 (ja) |
JP (3) | JP4550170B2 (ja) |
CN (1) | CN1166179C (ja) |
AU (1) | AU3150897A (ja) |
BR (1) | BR9709494A (ja) |
DE (1) | DE69719503T2 (ja) |
ES (1) | ES2188948T3 (ja) |
HK (1) | HK1022070A1 (ja) |
MY (1) | MY118286A (ja) |
WO (1) | WO1997046010A1 (ja) |
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1996
- 1996-08-13 US US08/696,292 patent/US5844595A/en not_active Expired - Lifetime
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1997
- 1997-05-22 JP JP54299297A patent/JP4550170B2/ja not_active Expired - Fee Related
- 1997-05-22 AU AU31508/97A patent/AU3150897A/en not_active Abandoned
- 1997-05-22 DE DE69719503T patent/DE69719503T2/de not_active Expired - Lifetime
- 1997-05-22 WO PCT/US1997/009332 patent/WO1997046010A1/en active IP Right Grant
- 1997-05-22 BR BR9709494A patent/BR9709494A/pt not_active IP Right Cessation
- 1997-05-22 CN CNB971966346A patent/CN1166179C/zh not_active Expired - Fee Related
- 1997-05-22 EP EP97926834A patent/EP0903034B1/en not_active Expired - Lifetime
- 1997-05-22 ES ES97926834T patent/ES2188948T3/es not_active Expired - Lifetime
- 1997-05-31 MY MYPI97002408A patent/MY118286A/en unknown
-
2000
- 2000-02-16 HK HK00100921A patent/HK1022070A1/xx not_active IP Right Cessation
-
2007
- 2007-10-02 JP JP2007258382A patent/JP4646148B2/ja not_active Expired - Fee Related
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2008
- 2008-02-13 JP JP2008031264A patent/JP4646151B2/ja not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
---|---|
JP4550170B2 (ja) | 2010-09-22 |
CN1166179C (zh) | 2004-09-08 |
JP2000512095A (ja) | 2000-09-12 |
DE69719503D1 (de) | 2003-04-10 |
DE69719503T2 (de) | 2003-09-25 |
HK1022070A1 (en) | 2000-07-21 |
EP0903034A1 (en) | 1999-03-24 |
JP2008199624A (ja) | 2008-08-28 |
WO1997046010A1 (en) | 1997-12-04 |
CN1226355A (zh) | 1999-08-18 |
MY118286A (en) | 2004-09-30 |
AU3150897A (en) | 1998-01-05 |
ES2188948T3 (es) | 2003-07-01 |
EP0903034B1 (en) | 2003-03-05 |
US5844595A (en) | 1998-12-01 |
JP4646151B2 (ja) | 2011-03-09 |
JP4646148B2 (ja) | 2011-03-09 |
BR9709494A (pt) | 1999-08-10 |
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