JP3570402B2 - Video signal processing method, video signal reproduction method, video signal processing device, and video signal reproduction device - Google Patents

Description

【００３４】
ここで、上記表１において、著作権情報Ｓ_１は著作権の有無を示すもので、Ｓ_１＝０にて著作権無しを示し、Ｓ_１＝１にて著作権有りを示す。また、世代情報Ｓ_２はコピー可能世代数を示すもので、Ｓ_２＝０にてコピー可能世代数が〔１〕であることを示し、Ｓ_２＝１にてコピー可能世代数が〔０〕であることを示す。
【００３５】
そして、上記著作権情報Ｓ_１が「０」である場合には、例えば図１８に示すように、テレビジョンチューナ１で受信したアナログ映像信号に重畳されていた著作権情報Ｓ_１が「０」である場合に、世代情報Ｓ_２が「０」，「１」のどちらであっても、第１のビデオテープレコーダ２による上記アナログ映像信号の記録を許可し、さらに、上記アナログ映像信号を記録した記録済ビデオテープから他のビデオテープへの上記アナログ映像信号のダビングすなわち上記第１のビデオテープレコーダ２から上記第２のビデオテープレコーダ３への上記映像信号のコピーも許可することがでる。
【００３６】
また、例えば図１９に示すように、テレビジョンチューナ（又はビデオテープレコーダ）４から出力されるアナログ映像信号に重畳されていた著作権情報Ｓ_１が「１」であり世代情報Ｓ_２が「０」である場合には、第１のビデオテープレコーダ５による上記アナログ映像信号の記録を許可する。そして、この第１のビデオテープレコーダ５では、著作権有りを示す著作権情報Ｓ_１＝１とコピー可能世代数が〔０〕であることを示す世代情報Ｓ_２＝１を上記アナログ映像信号に重畳して、上記著作権情報Ｓ_１及び世代情報Ｓ_２をアナログ映像信号とともにビデオテープに記録する。そして、上記第１のビデオテープレコーダ５により記録された上記アナログ映像信号を再生した場合に、その再生映像信号には、著作権有りを示す著作権情報Ｓ_１＝１とコピー可能世代数が〔０〕であることを示す世代情報Ｓ_２＝１が重畳されているので、上記アナログ映像信号を記録した記録済ビデオテープから他のビデオテープへの上記アナログ映像信号のダビングすなわち上記第１のビデオテープレコーダ５から上記第２のビデオテープレコーダ６への上記映像信号のコピーを禁止することができる。
【００３７】
さらに、著作権有りを示す著作権情報Ｓ_１＝１とコピー可能世代数が〔０〕であることを示す世代情報Ｓ_２＝１を重畳した映像信号を記録媒体に記録しておくことにより、例えば図２０に示すように、ビデオディスクプレーヤ７によりビデオディスクから再生される映像信号をビデオテープレコーダ８によりビデオテープに記録することを禁止することができる。
【００３８】
上述の如き著作権情報Ｓ_１と世代情報Ｓ_２は、例えばビデオテープレコーダの記録系において、映像信号とともにビデオテープに記録することができる。このビデオテープレコーダの記録系は、例えば図２１に示すように構成される。
【００３９】
この図２１に示すビデオテープレコーダの記録系は、入力映像信号に著作権情報Ｓ_１と世代情報Ｓ_２を重畳する重畳処理部１０を備え、この重畳処理部１０を介して上記入力映像信号が供給される記録信号処理回路１１により記録信号を生成し、この記録信号を記録ヘッド１２を介してビデオテープ１３に記録するようになっている。
【００４０】
上記重畳処理部１０は、入力映像信号にコピープロテクト情報として重畳されている著作権情報Ｓ_１と世代情報Ｓ_２を検出するコピープロテクト情報検出部１４を備え、このコピープロテクト情報検出部１４により検出された著作権情報Ｓ_１と世代情報Ｓ_２に基づいて、制御部１５により新たなコピープロテクト情報と記録制御信号を生成し、上記新たなコピープロテクト情報をエンコーダ１６により著作権情報Ｓ_１と世代情報Ｓ_２に変換し、この著作権情報Ｓ_１と世代情報Ｓ_２をコピープロテクト情報として重畳回路１７により上記入力映像信号に重畳するようになっている。
【００４１】
また、上記コピープロテクト情報検出部１４は、入力映像信号から垂直同期信号及び水平同期信号を分離する同期分離回路１８を備え、この同期分離回路１８により得られた垂直同期信号及び水平同期信号に基づいて、タイミングジェネレータ１９により上記入力映像信号のコピープロテクト情報が存在する位置を示すタイミングパルスを生成し、このタイミングジェネレータ１９により生成されたタイミングパルスに基づいて、デコーダ２０により上記入力映像信号から著作権情報Ｓ_１と世代情報Ｓ_２を検出するようになっている。
【００４２】
そして、上記制御部１５では、上記コピープロテクト情報検出部１４により検出された著作権情報Ｓ_１と世代情報Ｓ_２に基づいて、図２２のフローチャートに示す手順に従ってコピープロテクト情報と記録制御信号を生成することにより、コピーの世代制御を行うようになっている。
【００４３】
すなわち、上記制御部１５は、先ず、ステップ１において、著作権情報Ｓ_１により著作権の有無を判定する。そして、上記ステップ１における判定結果がＳ_１＝０すなわち著作権無しの場合には、ステップ２に移り、Ｓ_１＝０の著作権情報Ｓ_１とＳ_２＝０又はＳ_２＝１の世代情報Ｓ_２を上記エンコーダ１６から出力させるコピープロテクト情報を生成し、さらに、ステップ３でコピー許可を示す記録制御信号を生成する。
【００４４】
また、上記ステップ１における判定結果がＳ_１＝１すなわち著作権有りの場合には、ステップ４に移り、世代情報Ｓ_２によりコピー世代を判定する。そして、このステップ４における判定結果がＳ_２＝１すなわちコピー可能世代数が〔０〕である場合には、ステップ５に移ってコピー禁止を示す記録制御信号を生成する。
【００４５】
さらに、上記ステップ４における判定結果がＳ_２＝０すなわちコピー可能世代数が１である場合には、ステップ６に移り、Ｓ_１＝１の著作権情報Ｓ_１とＳ_２＝１の世代情報Ｓ_２を上記エンコーダ１６から出力させるコピープロテクト情報を生成し、さらに、ステップ７でコピー許可を示す記録制御信号を生成する。
【００４６】
そして、このビデオテープレコーダの記録系において、上記記録信号処理回路１１は、上記制御部１５により生成された記録制御信号に応じて記録信号の生成処理を行うもので、コピー許可を示す記録制御信号が上記制御部１５から供給された場合に、上記重畳処理部１０により著作権情報Ｓ_１と世代情報Ｓ_２が重畳された入力映像信号についての記録信号を生成する。また、上記記録信号処理回路１１は、コピー禁止を示す記録制御信号が上記制御部１５から供給された場合には、記録信号の生成処理を停止する。
【００４７】
このような構成の記録系を有するビデオテープレコーダでは、入力映像信号に対して、画面に表示される有効映像区間以外の区間に著作権情報Ｓ_１と世代情報Ｓ_２を重畳処理部１０により重畳して、上記著作権情報Ｓ_１と世代情報Ｓ_２を上記映像信号とともにビデオテープ１３に記録することができる。また、上記コピープロテクト情報検出部１４で入力映像信号から検出される著作権情報Ｓ_１と世代情報Ｓ_２に基づいて上記制御部１５により記録制御信号を生成し、この記録制御信号に応じて上記記録信号処理回路１１で記録信号の生成処理を行うようにしたことにより、上記制御部１５によりコピーが許可された映像信号だけをビデオテープ１３に記録することができる。
【００４８】
本発明では、上述の如き著作権情報Ｓ_１と世代情報Ｓ_２を映像信号に重畳する処理をビデオテープレコーダの再生系において行う。このビデオテープレコーダの再生系は、例えば図２３に示すように構成される。
【００４９】
この図２３に示すビデオテープレコーダの再生系は、ビデオテープ２１の記録トラックを走査する再生ヘッド２２が接続された再生信号処理回路２３により得られる再生映像信号が供給される重畳処理部２４を備え、この重畳処理部２４により著作権情報Ｓ_１と世代情報Ｓ_２をコピープロテクト情報として重畳した再生映像信号を出力するようになっている。
【００５０】
上記重畳処理部２４は、上記再生信号処理回路２３により得られる再生映像信号に重畳されているコピープロテクト情報を検出するコピープロテクト情報検出部２５を備え、このコピープロテクト情報検出部２５により検出されたコピープロテクト情報に基づいて、制御部２６により新たなコピープロテクト情報を生成し、上記新たなコピープロテクト情報をエンコーダ２７により著作権情報Ｓ_１と世代情報Ｓ_２に変換し、この著作権情報Ｓ_１と世代情報Ｓ_２をコピープロテクト情報として重畳回路２８により上記再生映像信号に重畳するようになっている。
【００５１】
また、上記制御部２６では、上記コピープロテクト情報検出部２５により検出されたコピープロテクト情報に基づいて、図２４のフローチャートに示す手順に従ってコピープロテクト情報を生成することにより、コピーの世代制御を行うようになっている。
【００５２】
すなわち、上記制御部２６は、先ず、ステップ１において、コピープロテクト情報により著作権の有無及びコピー世代を判定する。そして、上記ステップ１における判定結果が著作権無しの場合には、ステップ２に移り、Ｓ_１＝０の著作権情報Ｓ_１とＳ_２＝０又はＳ_２＝１の世代情報Ｓ_２を上記エンコーダ２７から出力させるコピープロテクト情報を生成する。
【００５３】
また、上記ステップ１における判定結果が著作権有りでコピー可能世代数が１である場合には、ステップ３に移り、Ｓ_１＝１の著作権情報Ｓ_１とＳ_２＝０の世代情報Ｓ_２を上記エンコーダ２７から出力させるコピープロテクト情報を生成する。
【００５４】
さらに、上記ステップ１における判定結果が著作権有りでコピー可能世代数が０である場合には、ステップ４に移り、Ｓ_１＝１の著作権情報Ｓ_１とＳ_２＝１の世代情報Ｓ_２を上記エンコーダ２７から出力させるコピープロテクト情報を生成する。
【００５５】
このような再生系を備えるビデオテープレコーダでは、上記ビデオテープ２１から再生される再生映像信号に対し、上記重畳処理部２４により画面に表示される有効映像区間以外の区間に著作権情報Ｓ_１と世代情報Ｓ_２を重畳した再生画像信号を出力することができ、この再生映像信号を上述の如き記録系を有するビデオテープレコーダで記録する場合の世代制限を行うことができる。
【００５６】
また、以上の説明では、１世代のみのコピー制限を行うＳＣＭＳを仮定して世代情報Ｓ_２を１ビットとしたが、上記世代情報Ｓ_２を多ビットとして複数世代に亘るコピーを可能にするような世代制限を行うようにすることもできる。
【００５７】
例えば、図２５に示すように、ＮＴＳＣ方式の映像信号の第２０ライン（奇数フィールドの第２０ライン）と第２８３ライン（偶数フィールドの第２０ライン）にそれぞれ重畳されるビデオＩＤの特定の３ビットを用いて、１ビットの著作権情報Ｓ_１と２ビットの世代情報Ｓ_２を伝送するようにしても良い。
【００５８】
上記ビデオＩＤは、図２６に示すように、ワイドＩＤ（２ビットデータＡ）とモード番号（４ビットデータＢ）とデータ又はフラグ（８ビットデータＣ）とエラーチェックコード（６ビットデータＤ）からなる２０ビットで構成されている。
【００５９】
そして、上記ワイドＩＤ（２ビットデータＡ）は、映像信号の伝送形式に関する識別情報であって、次の表２に示すように、伝送アスペクト比が１６：９であるか４：３であるかを第１ビットで示し、画像表示形式がレターボックス形式であるか標準形式であるかを第２ビットで示す。
【００６０】
【表２】

【００６１】
また、上記モード番号（４ビットデータＢ）は、上記データ又はフラグ（８ビットデータＣ）を１６種類のデータに仕分けする識別情報であって、次の表３に示すように、システムフラグや日時データなどとして定義する。
【００６２】
【表３】

【００６３】
すなわち、上記モード番号は、〔００００〕であるときに上記８ビットデータＣがシステムフラグであることを示し、また、〔０００１〕であるときに上記８ビットデータＣが撮影時の日付けのうちの年の値であることを示す。同様に、〔１１００〕は文字列のスタートを示し、〔１１０１〕は上記８ビットデータＣが文字データであることを示し、〔１１１０〕は文字列の終了を示す。これにより、番組タイトルなどの文字情報を記録伝送することができる。
【００６４】
また、上記モード番号〔００００〕で定義される上記８ビットデータＣすなわちシステムフラグは、画像のステータスを表すもので、次の表４に示すように、ビット０が著作権情報Ｓ_１に割り当てられ、ビット１及びビット２が世代情報Ｓ_２に割り当てられ、ビット３が立体（３Ｄ）映像か否かを示す情報に割り当てられ、さらに、ビット７がレターボックスの黒領域に字幕があるか否かを示す情報に割り当てられている。
【００６５】
【表４】

【００６６】
ここで、上記ビット３に割り当てられた情報は、奇数フィールドと偶数フィールドとで左右の視差のある画像を記録し、再生時に液晶シャッタなどで奇数フィールドと偶数フィールドをスイッチングすることにより立体視させる３Ｄモードの制御を行うのに使用される。また、ビット７に割り当てられた情報は、字幕がレターボックスの黒領域にある場合、ワイドアペクト比の画面でズームすると字幕が消えてしまうので、ズームしないようにしたり、黒領域の字幕をスライスして、他の領域に表示するなどの制御を行うのに使用される。
【００６７】
そして、上記ビット０に割り当てられた著作権情報Ｓ_１は、著作権の有無を「１／０」で示す。また、上記ビット１及びビット２に割り当てられられた世代情報Ｓ_２は、表５に示すように、Ｓ_２＝１１にてコピー可能な世代数〔３〕を示し、また、Ｓ_２＝１０にてコピー可能な世代数〔２〕を示し、また、Ｓ_２＝０１にてコピー可能な世代数〔１〕を示し、さらに、Ｓ_２＝００にてコピー可能な世代数「０」を示す。
【００６８】
【表５】

【００６９】
この例では、上記１ビットの著作権情報Ｓ_１と２ビットの世代情報Ｓ_２を用いて表６に示すようなコピーの世代制限を行うことができる。
【００７０】
【表６】

【００７１】
すなわち、例えば図２７に示すように、ビデオソース３０から供給された映像信号に著作権無しを示す著作権情報Ｓ_１＝０が重畳されていた場合には、世代情報Ｓ_２が００，０１，１０，１１のいずれであっても、第１のビデオテープレコーダ３１による上記映像信号の記録を許可し、さらに、上記映像信号を記録した記録済ビデオテープから他のビデオテープへの上記映像信号のダビング、すなわち、上記第１のビデオテープレコーダ３１から第２のビデオテープレコーダ３２への上記映像信号のコピーや上記第２のビデオテープレコーダ３２から第３のビデオテープレコーダ３３への上記映像信号のコピーも許可することができる。
【００７２】
また、例えば図２８に示すように、ビデオソース３０から供給された映像信号に著作権有りを示す著作権情報Ｓ_１＝１とコピー可能世代数が〔０〕であることを示す世代情報Ｓ_２＝００が重畳されていた場合には、上記映像信号を第１のビデオテープレコーダ３１によりビデオテープに記録することが禁止される。
【００７３】
また、例えば図２９に示すように、ビデオソース３０から供給された映像信号に著作権有りを示す著作権情報Ｓ_１＝１とコピー可能世代数が〔１〕であることを示す世代情報Ｓ_２＝０１が重畳されていた場合には、上記映像信号を第１のビデオテープレコーダ３１によりビデオテープに記録することが許可される。
【００７４】
この第１のビデオテープレコーダ３１では、著作権有りを示す著作権情報Ｓ_１＝１とコピー可能世代数をデクリメントしてコピー可能世代数が〔０〕であることを示す世代情報Ｓ_２＝００を上記映像信号に重畳して、上記著作権情報Ｓ_１及び世代情報Ｓ_２を映像信号とともにビデオテープに記録する。上記第１のビデオテープレコーダ３１により記録された上記映像信号を再生した場合に、その再生映像信号には、著作権有りを示す著作権情報Ｓ_１＝１とコピー可能世代数が〔０〕であることを示す世代情報Ｓ_２＝００が重畳されているので、上記映像信号を記録した記録済ビデオテープから他のビデオテープへの上記映像信号のダビングすなわち上記第１のビデオテープレコーダ３１から第２のビデオテープレコーダ３２への上記映像信号のコピーが禁止される。
【００７５】
すなわち、著作権があることを示す著作権情報Ｓ_１＝１とコピー可能世代数が〔１〕であることを示す世代情報Ｓ_２＝０１を映像信号に重畳しておくことにより、１世代のみのコピーを許可し、２世代以上のコピーを禁止する世代制限を行うことができる。
【００７６】
また、例えば図３０に示すように、ビデオソース３０から供給された映像信号に著作権有りを示す著作権情報Ｓ_１＝１とコピー可能世代数が〔２〕であることを示す世代情報Ｓ_２＝１０が重畳されていた場合には、上記映像信号を第１のビデオテープレコーダ３１によりビデオテープに記録することが許可される。
【００７７】
この第１のビデオテープレコーダ３１では、著作権有りを示す著作権情報Ｓ_１＝１とコピー可能世代数をデクリメントしてコピー可能世代数が〔１〕であることを示す世代情報Ｓ_２〔０１〕を上記映像信号に重畳して、上記著作権情報Ｓ_１及び世代情報Ｓ_２を映像信号とともにビデオテープに記録する。上記第１のビデオテープレコーダ３１により記録された上記映像信号を再生した場合に、その再生映像信号には、著作権有りを示す著作権情報Ｓ_１＝１とコピー可能世代数が〔１〕であることを示す世代情報Ｓ_２＝０１が重畳されているので、上記映像信号を記録した記録済ビデオテープから他のビデオテープへの上記映像信号のダビングすなわち上記第１のビデオテープレコーダ３１から第２のビデオテープレコーダ３２への上記映像信号のコピーが許可される。
【００７８】
この第２のビデオテープレコーダ３２では、著作権有りを示す著作権情報Ｓ_１＝１とコピー可能世代数をデクリメントしてコピー可能世代数が〔０〕であることを示す世代情報Ｓ_２〔００〕を上記映像信号に重畳して、上記著作権情報Ｓ_１及び世代情報Ｓ_２を映像信号とともにビデオテープに記録する。そして、上記第２のビデオテープレコーダ３２により記録された上記映像信号を再生した場合に、その再生映像信号には、著作権有りを示す著作権情報Ｓ_１＝１とコピー可能世代数が〔０〕であることを示す世代情報Ｓ_２＝００が重畳されているので、上記映像信号を記録した記録済ビデオテープから他のビデオテープへの上記映像信号のダビングすなわち上記第２のビデオテープレコーダ３２から第３のビデオテープレコーダ３３への上記映像信号のコピーが禁止される。
【００７９】
すなわち、著作権があることを示す著作権情報Ｓ_１＝１とコピー可能世代数が〔２〕であることを示す世代情報Ｓ_２＝１０を映像信号に重畳しておくことにより、２世代までのコピーを許可し、３世代以上のコピーを禁止する世代制限を行うことができる。
【００８０】
さらに、例えば図３１に示すように、ビデオソース３０から供給された映像信号に著作権有りを示す著作権情報Ｓ_１＝１とコピー可能世代数が〔３〕であることを示す世代情報Ｓ_２＝１１が重畳されていた場合には、上記映像信号を第１のビデオテープレコーダ３１によりビデオテープに記録することが許可される。
【００８１】
この第１のビデオテープレコーダ３１では、著作権有りを示す著作権情報Ｓ_１＝１とコピー可能世代数をデクリメントしてコピー可能世代数が〔２〕であることを示す世代情報Ｓ_２〔１０〕を上記映像信号に重畳して、上記著作権情報Ｓ_１及び世代情報Ｓ_２を映像信号とともにビデオテープに記録する。上記第１のビデオテープレコーダ３１により記録された上記映像信号を再生した場合に、その再生映像信号には、著作権有りを示す著作権情報Ｓ_１＝１とコピー可能世代数が〔２〕であることを示す世代情報Ｓ_２＝１０が重畳されているので、上記映像信号を記録した記録済ビデオテープから他のビデオテープへの上記映像信号のダビングすなわち上記第１のビデオテープレコーダ３１から第２のビデオテープレコーダ３２への上記映像信号のコピーが許可される。
【００８２】
この第２のビデオテープレコーダ３２では、著作権有りを示す著作権情報Ｓ_１＝１とコピー可能世代数をデクリメントしてコピー可能世代数が〔１〕であることを示す世代情報Ｓ_２〔０１〕を上記映像信号に重畳して、上記著作権情報Ｓ_１及び世代情報Ｓ_２を映像信号とともにビデオテープに記録する。上記第２のビデオテープレコーダ３２により記録された上記映像信号を再生した場合に、その再生映像信号には、著作権有りを示す著作権情報Ｓ_１＝１とコピー可能世代数が〔１〕であることを示す世代情報Ｓ_２＝０１が重畳されているので、上記映像信号を記録した記録済ビデオテープから他のビデオテープへの上記映像信号のダビングすなわち上記第２のビデオテープレコーダ３２から第３のビデオテープレコーダ３３への上記映像信号のコピーが許可される。
【００８３】
この第３のビデオテープレコーダ３３では、著作権有りを示す著作権情報Ｓ_１＝１とコピー可能世代数をデクリメントしてコピー可能世代数が〔０〕であることを示す世代情報Ｓ_２＝００を上記映像信号に重畳して、上記著作権情報Ｓ_１及び世代情報Ｓ_２を映像信号とともにビデオテープに記録する。そして、上記第３のビデオテープレコーダ３３により記録された上記映像信号を再生した場合に、その再生映像信号には、著作権有りを示す著作権情報Ｓ_１＝１とコピー可能世代数が〔０〕であることを示す世代情報Ｓ_２＝００が重畳されているので、上記映像信号を記録した記録済ビデオテープから他のビデオテープへの上記映像信号のダビングすなわち上記第３のビデオテープレコーダ３３から第４のビデオテープレコーダ３４への上記映像信号のコピーが禁止される。
【００８４】
すなわち、著作権があることを示す著作権情報Ｓ_１＝１とコピー可能世代数が〔３〕であることを示す世代情報Ｓ_２＝１１を映像信号に重畳しておくことにより、３世代までのコピーを許可し、４世代以上のコピーを禁止する世代制限を行うことができる。
【００８５】
このように、世代情報Ｓ_２を多ビットとすることにより複数世代に亘るコピーを許可する世代制限を行うことができる。
【００８６】
【発明の効果】
以上のように、本発明によれば、記録媒体から再生した画像情報の画面に表示される有効映像区間以外の区間に重畳処理手段により著作権情報と世代情報を重畳した再生画像情報を出力することができ、著作権の有無によりコピーの許可／禁止だけでなく、コピーの世代制限を行うことができる。
【図面の簡単な説明】
【図１】本発明により処理された映像信号の一例を示す波形図である。
【図２】図１の例における著作権情報の重畳状態を示す波形図である。
【図３】図１の例における世代情報の重畳状態を示す波形図である。
【図４】本発明により処理された映像信号の他の例を示す波形図である。
【図５】図４の例における著作権情報の重畳状態を示す波形図である。
【図６】図４の例における世代情報の重畳状態を示す波形図である。
【図７】本発明により処理された映像信号の他の例を示す波形図である。
【図８】図７の例における著作権情報の重畳状態を示す波形図である。
【図９】本発明により処理された映像信号の他の例を示す波形図である。
【図１０】図９の例における著作権情報の重畳状態を示す波形図である。
【図１１】図９の例における著作権情報及び世代情報の他の重畳状態を示す波形図である。
【図１２】図９の例における著作権情報及び世代情報の他の重畳状態を示す波形図である。
【図１３】本発明により処理された映像信号の他の例を示す波形図である。
【図１４】図１３の例における著作権情報及び世代情報の重畳状態を示す波形図である。
【図１５】本発明により処理された映像信号の他の例を示す波形図である。
【図１６】図１５の例における著作権情報及び世代情報の重畳状態を示す波形図である。
【図１７】本発明により処理されたＨＤ方式の映像信号に対する著作権情報及び世代情報の重畳状態の一例を示す波形図である。
【図１８】本発明における著作権情報及び世代情報の使用態様を説明するためのブロック図である。
【図１９】本発明における著作権情報及び世代情報の他の使用態様を説明するためのブロック図である。
【図２０】本発明における著作権情報及び世代情報の他の使用態様を説明するためのブロック図である。
【図２１】著作権情報及び世代情報を記録する画像情報記録装置の構成例を示すブロック図である。
【図２２】上記画像情報記録装置における制御部の動作を示すフローチャートである。
【図２３】本発明に係る画像情報再生装置の構成例を示すブロック図である。
【図２４】上記画像情報再生装置における制御部の動作を示すフローチャートである。
【図２５】本発明により処理された映像信号の他の例を示す波形図である。
【図２６】図２５の例における著作権情報及び世代情報の重畳状態を示す波形図である。
【図２７】図２５の例における著作権情報及び世代情報の使用態様を説明するためのブロック図である。
【図２８】図２５の例における著作権情報及び世代情報の他の使用態様を説明するためのブロック図である。
【図２９】図２５の例における著作権情報及び世代情報の使用態様を説明するためのブロック図である。
【図３０】図２５の例の例における著作権情報及び世代情報の他の使用態様を説明するためのブロック図である。
【図３１】図２５の例における著作権情報及び世代情報の他の使用態様を説明するためのブロック図である。
【符号の説明】
１，４ テレビジョンチューナ、２，３，５，６，８ ビデオテープレコーダ、７ ビデオディスクプレーヤ、１０，２４ 重畳処理部、１１ 記録信号処理回路、１２ 記録ヘッド、１３，２１ ビデオテープ、１４，２５ コピープロテクト情報検出部、１５，２６ 制御部、１６，２７ エンコーダ、１７，２８重畳回路、１８ 同期分離回路、１９ タイミングジェネレータ、２０ デコーダ、２２ 再生ヘッド、２３ 再生信号処理回路、３０ ビデオソース、３１，３２，３３ ビデオテープレコーダ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a video signal processing method, a video signal reproduction method, a video signal processing device, and a video signal reproduction device that can effectively prevent unauthorized copying of image information.
[0002]
[Prior art]
2. Description of the Related Art With the spread of recording / reproducing apparatuses, recorded video tapes on which movies and the like are recorded are generally sold. Making a copy of such a recorded videotape is prohibited by law, but if two recording and playback devices are ready, the recorded videotape can be copied (dubbed) and copied easily. Can be created.
[0003]
In order to prevent such illegal copying of a video tape, for example, as described in Japanese Patent Application Laid-Open No. 52-132811, recorded recording in which a 1-bit dubbing prevention signal is inserted in a state separable from a video signal. The applicant has previously proposed a medium.
[0004]
[Problems to be solved by the invention]
By the way, in the conventional method of preventing unauthorized copying by inserting a 1-bit dubbing prevention signal, the permission / prohibition of copying, that is, the presence or absence of copyright can only be indicated by the 1-bit dubbing prevention signal. It cannot cope with the generation restriction (SCMS: Serial Copy Management System).
[0005]
Therefore, an object of the present invention is to provide a video signal processing method, a video signal reproducing method, a video signal processing apparatus, a video signal processing apparatus, and a video signal capable of outputting copyright information and generation information together with reproduced image information in view of the above-described conventional circumstances. A playback device is provided.
[0006]
[Means for Solving the Problems]
The present invention is a video signal processing method for processing a video signal, wherein the video signal is an effective image section including display image information, a multiple bit mode number and a multiple bit data associated with the mode number or A non-image section including vertical blanking section data (VBID) including a data flag, and the plurality of bits or the predetermined bits of the data flag represent different information by the classification function of the plurality of bits of the mode number. The multi-bit mode number selectively classifies the multi-bit data or data flag as data or a flag, and generates copyright information indicating whether or not the display image information has a copyright. And whether the copy generated from the processed video signal can be generated for one generation when the display image has a copyright. Generating generation information indicating, and when the mode number of the plurality of bits classifies the related data or data flag of the plurality of bits as a flag, assigns the copyright information and the generation information to the predetermined bits, Generating the processed video signal.
[0007]
The present invention also relates to a video signal reproducing method for reproducing a video signal, wherein the video signal has an effective image section and a non-image section, and the display image information generated from the video signal has a copyright. And has copy protection information indicating whether one copy can be generated from the video signal when the display image information has a copyright, and reproduces the video signal from the recording medium. And the step of detecting the copy protection information from the reproduced video signal, and the step of generating copyright information based on the copy protection information indicating whether the video signal is copyrighted, When the display image has a copyright, a step of generating, based on the copy protection information, generation information indicating whether a copy generated from the processed video signal can be generated for one generation, The multi-bit data flag and the multi-bit mode number included in the direct blanking interval data (VBID) are used to assign the copyright information and the generation to predetermined bits of the multi-bit data flag classified according to the mode number. Allocating both pieces of information; and allocating the VBID data to a non-image section of the reproduced video signal.
[0008]
Further, the present invention is a video signal processing device for processing a video signal, wherein the video signal includes an effective image section including display image information, a mode number of a plurality of bits, and a plurality of bits related to the mode number. A non-image section including vertical blanking section data (VBID) composed of data or data flags, and information in which predetermined bits of the plurality of bits or data flags are different by the classification function of the plurality of mode numbers. As shown, the multiple-bit mode number selectively classifies the multiple-bit data or data flag as data or a flag, and sets copyright information indicating whether or not the display image information has a copyright. Means for generating, and when the display image information has a copyright, a copy generated from the processed video signal can be generated for one generation. Means for generating generation information indicating whether or not the copyright information and the generation information are divided into the predetermined bits by classifying the copyright information and the generation information when classifying the associated multi-bit data or data flag as a flag. And a means for generating the processed video signal.
[0009]
Further, the present invention is a video signal reproducing apparatus for reproducing a video signal, wherein the video signal has an effective image section and a non-image section, and whether or not the image generated by the video signal has a copyright. Means for indicating whether or not a continuous generation of copies can be generated from the video signal, and means for reproducing the video signal from a recording medium; and Means for detecting copy protection information, means for generating copyright information based on the copy protection information indicating whether or not the video signal is copyrighted, and when the display image has a copyright, Means for generating, based on the copy protection information, generation information indicating whether or not one generation of a copy generated from the processed video signal can be generated; and information included in vertical blanking interval data (VBID). Means for assigning both the copyright information and the generation information to a predetermined bit of the multi-bit data flag classified according to the mode number by using the multi-bit data flag and the multi-bit mode number; To a non-image section of the reproduced video signal.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0011]
In the present invention, copyright information and generation information are superimposed on sections other than the effective video section displayed on the screen of the image information and transmitted together with the image information, thereby effectively preventing unauthorized copying of the image information. For example, as shown in FIG. ₁ And generation information S ₂ Are transmitted alternately for each field.
[0012]
In the example shown in FIG. 1, the 1-bit copyright information S shown in FIG. ₁ Is superimposed on the 20th line (the 20th line of the odd field), and 1-bit generation information S as shown in FIG. 3 indicating the number of copyable generations “0/1”. ₂ Is superimposed on the 283rd line (the 20th line of the even-numbered field), and the copyright information S together with the NTSC video signal is displayed. ₁ And generation information S ₂ Are transmitted alternately for each field.
[0013]
As described above, by alternately transmitting the copyright information and the generation information together with the NTSC video signal for each field, the receiving side can convert the received NTSC video signal into a field based on the horizontal synchronization signal and the vertical synchronization signal. By making a determination, copyright information can be detected from the twentieth line of the odd field, and generation information can be detected from the twentieth line of the even field. Generation restriction is performed using the copyright information and the generation information. Can be.
[0014]
As shown in FIG. 4, copyright information and generation information may be alternately transmitted for each field as a specific bit of a video ID together with an NTSC video signal.
[0015]
In the example shown in FIG. 4, the 1-bit copyright information S indicating the presence or absence of the copyright as "1/0" as a specific bit of the video ID as shown in FIG. ₁ Is superimposed on the twentieth line (the twentieth line of the odd field), and 1-bit generation information S indicating the number of generations “0/1” that can be copied as a specific bit of the video ID as shown in FIG. ₂ Is superimposed on the 283rd line (the 20th line of the even-numbered field), and the copyright information S together with the NTSC video signal is displayed. ₁ And generation information S ₂ Are transmitted alternately for each field.
[0016]
As described above, by transmitting the copyright information and the generation information alternately for each field as a specific bit of the video ID together with the NTSC video signal, the receiving side can perform horizontal synchronization on the received NTSC video signal. The copyright information is detected as a specific bit of the video ID from the 20th line of the odd field by performing a field determination based on the signal and the vertical synchronization signal, and is determined as the specific 1 bit of the video ID from the 20th line of the even field. The generation information can be detected, and the copy generation can be restricted using the copyright information and the generation information.
[0017]
As shown in FIG. 7, the copyright information S together with the NTSC video signal is displayed. ₁ And generation information S ₂ May be transmitted every field.
[0018]
In the example shown in FIG. 7, the 1-bit copyright information S indicating the presence or absence of the copyright by "1/0" as shown in FIG. ₁ And 1-bit generation information S indicating the number of copyable generations “0/1” ₂ Is superimposed on the 20th line (the 20th line of the odd field) and the 283rd line (the 20th line of the even field) as data for one line, and the copyright information S together with the video signal of the NTSC system. ₁ And generation information S ₂ Is transmitted every field.
[0019]
As described above, by transmitting the copyright information and the generation information together with the NTSC video signal in each field, the receiving side detects the copyright information and the generation information in each field of the received NTSC video signal. Copy generation can be restricted.
[0020]
Further, as shown in FIG. 9, copyright information and generation information may be transmitted in each field as specific two bits of a video ID together with an NTSC video signal.
[0021]
In the example shown in FIG. 9, as shown in FIG. 10, for example, as shown in FIG. ₁ And 1-bit generation information S indicating the number of copyable generations “0/1” ₂ Are superimposed on the 20th line (the 20th line of the odd field) and the 283rd line (the 20th line of the even field) as data of one line, with the video ID in which the Copyright information S with video signal ₁ And generation information S ₂ Is transmitted every field.
[0022]
The video ID may have the header bits omitted as shown in FIG. 11, or the reference bits may be omitted as shown in FIG.
[0023]
As described above, by transmitting the copyright information and the generation information as the specific two bits of the video ID together with the NTSC video signal in each field, the receiving side receives the NTSC video signal in the 20th field of each field. Generation information can be detected in each field as specific two bits of the video ID of the line, and the copy generation can be restricted using the copyright information and the generation information.
[0024]
As shown in FIG. 13, copyright information S is used as data for two lines of an NTSC video signal. ₁ And generation information S ₂ May be transmitted every field.
[0025]
In the example shown in FIG. 13, the 1-bit copyright information S indicating the presence or absence of the copyright by "1/0" as shown in FIG. ₁ Is the data for one line, is superimposed on the 19th line (the 19th line of the odd field) and the 282nd line (the 19th line of the even field), and indicates the number of copyable generations “0/1”. Bit generation information S ₂ Are superimposed on the 20th line (the 20th line of the odd field) and the 283rd line (the 20th line of the even field) as the data of the next one line, respectively, and the copyright information S together with the video signal of the NTSC system. ₁ And generation information S ₂ Is transmitted every field.
[0026]
As described above, the copyright information S as the data for the two lines of the nineteenth line and the twentieth line of each field together with the NTSC video signal. ₁ And generation information S ₂ Is transmitted on a field-by-field basis, the receiving side can detect the copyright information and the generation information on a field-by-field basis for the received video signal of the NTSC system and restrict the generation of copying.
[0027]
Further, as shown in FIG. 15, copyright information and generation information may be transmitted in each field as one specific bit of a video ID for two lines together with an NTSC video signal.
[0028]
In the example shown in FIG. 15, for example, as shown in FIG. 16, the 1-bit copyright information S indicating the presence or absence of the copyright is indicated by “1/0” for the NTSC video signal. ₁ Is superimposed on the 19th line (the 19th line of the odd field) and the 283rd line (the 19th line of the even field) as the data of one line, and can be copied. 1-bit generation information S indicating the number of generations “0/1” ₂ Is superimposed on the 20th line (the 20th line of the odd field) and the 283rd line (the 20th line of the even field) as the data of one line with the video ID in which Copyright information S with video signal ₁ And generation information S ₂ Is transmitted every field.
[0029]
As described above, by transmitting the copyright information and the generation information as a specific bit of each video ID of the 19th and 20th lines of each field together with the NTSC video signal in each field, the reception side receives the information. For the NTSC system video signal, copyright information and generation information are detected for each field as a specific bit of each video ID on the 19th and 20th lines of each field, and the above copyright information and generation information are used. Copy generation can be restricted.
[0030]
In each of the above examples, the copyright information and the generation information are superimposed on the 19th and 20th lines of each field on the NTSC video signal, and the copyright information S and the NTSC video signal are superimposed. ₁ And generation information S ₂ However, the line on which the copyright information and the generation information are superimposed is not limited to the 19th and 20th lines of each field, but is substantially displayed on the screen of the image information. The line may be in a section other than the effective video section. Further, the present invention is not only effective for video signals of the NTSC system, but can also be applied to video signals of the PAL system and the HD system.
[0031]
For example, as shown in FIG. 17, for example, as shown in FIG. ₁ And 1-bit generation information S indicating the number of copyable generations “0/1” ₂ Is superimposed on the 32nd line (the 32nd line of the odd-numbered field) and the 595th line (the 32nd line of the even-numbered field) as the data for one line by assigning the video ID assigned to specific two bits to the HD video. Copyright information S with signal ₁ And generation information S ₂ Is transmitted on a field-by-field basis, the receiving side detects the generation information for each field as the specific 2 bits of the video ID of the 32nd line of each field in the received HD video signal, Copy generation can be restricted using the generation information.
[0032]
Copyright information S ₁ And generation information S ₂ Can be used to limit the generation of copies as shown in Table 1, for example.
[0033]
[Table 1]

[0034]
Here, in Table 1 above, the copyright information S ₁ Indicates whether or not there is a copyright. ₁ = 0 indicates no copyright, S ₁ = 1 indicates that there is a copyright. Also, generation information S ₂ Indicates the number of copyable generations. ₂ = 0 indicates that the number of copyable generations is [1]. ₂ = 1 indicates that the number of copyable generations is [0].
[0035]
And the copyright information S ₁ Is "0", the copyright information S superimposed on the analog video signal received by the television tuner 1, as shown in FIG. ₁ Is "0", the generation information S ₂ Is "0" or "1", the recording of the analog video signal by the first video tape recorder 2 is permitted, and another video is recorded from the recorded video tape on which the analog video signal is recorded. The dubbing of the analog video signal to a tape, that is, the copying of the video signal from the first video tape recorder 2 to the second video tape recorder 3 can be permitted.
[0036]
Further, as shown in FIG. 19, for example, the copyright information S superimposed on the analog video signal output from the television tuner (or video tape recorder) 4 ₁ Is “1” and generation information S ₂ Is "0", the recording of the analog video signal by the first video tape recorder 5 is permitted. In the first video tape recorder 5, copyright information S indicating that there is a copyright is provided. ₁ = 1 and generation information S indicating that the number of copyable generations is [0] ₂ = 1 is superimposed on the analog video signal, and the copyright information S ₁ And generation information S ₂ Is recorded on a video tape together with the analog video signal. When the analog video signal recorded by the first video tape recorder 5 is reproduced, the reproduced video signal contains copyright information S indicating that there is a copyright. ₁ = 1 and generation information S indicating that the number of copyable generations is [0] ₂ = 1 is superimposed, so that dubbing of the analog video signal from a recorded video tape on which the analog video signal is recorded to another video tape, that is, from the first video tape recorder 5 to the second video tape recorder 6 can be prohibited.
[0037]
Further, copyright information S indicating that there is a copyright ₁ = 1 and generation information S indicating that the number of copyable generations is [0] ₂ By recording a video signal on which = 1 is superimposed on a recording medium, a video signal reproduced from a video disk by a video disk player 7 is recorded on a video tape by a video tape recorder 8 as shown in FIG. 20, for example. Can be banned.
[0038]
Copyright information S as described above ₁ And generation information S ₂ Can be recorded on a video tape together with a video signal in, for example, a recording system of a video tape recorder. The recording system of this video tape recorder is configured, for example, as shown in FIG.
[0039]
The recording system of the video tape recorder shown in FIG. ₁ And generation information S ₂ A recording signal is generated by a recording signal processing circuit 11 to which the input video signal is supplied via the superposition processing unit 10, and the recording signal is transmitted to a video tape via a recording head 12. 13 is recorded.
[0040]
The superimposition processing unit 10 outputs the copyright information S superimposed on the input video signal as copy protection information. ₁ And generation information S ₂ And a copy protection information detection unit 14 for detecting the copyright information S detected by the copy protection information detection unit 14. ₁ And generation information S ₂ The new copy protection information and the recording control signal are generated by the control unit 15 on the basis of the ₁ And generation information S ₂ Into the copyright information S ₁ And generation information S ₂ Is superimposed on the input video signal by the superimposition circuit 17 as copy protection information.
[0041]
Further, the copy protection information detecting section 14 includes a synchronization separation circuit 18 for separating a vertical synchronization signal and a horizontal synchronization signal from an input video signal, based on the vertical synchronization signal and the horizontal synchronization signal obtained by the synchronization separation circuit 18. Then, the timing generator 19 generates a timing pulse indicating a position where the copy protection information of the input video signal exists, and the decoder 20 converts the copyright from the input video signal based on the timing pulse generated by the timing generator 19. Information S ₁ And generation information S ₂ Is detected.
[0042]
Then, in the control unit 15, the copyright information S detected by the copy protection information detection unit 14 is output. ₁ And generation information S ₂ The copy generation information is generated by generating copy protection information and a recording control signal in accordance with the procedure shown in the flowchart of FIG.
[0043]
That is, the control unit 15 first sets the copyright information S ₁ To determine whether there is a copyright. Then, the determination result in step 1 is S ₁ = 0, that is, when there is no copyright, the process proceeds to step 2 and S ₁ = 0 copyright information S ₁ And S ₂ = 0 or S ₂ = 1 generation information S ₂ Is generated from the encoder 16, and a recording control signal indicating copy permission is generated in step 3.
[0044]
In addition, the determination result in the above step 1 is S ₁ = 1, that is, if there is a copyright, the process proceeds to step 4 and the generation information S ₂ Is used to determine the copy generation. Then, the determination result in step 4 is S ₂ If = 1, that is, if the number of copyable generations is [0], the flow proceeds to step 5 to generate a recording control signal indicating copy prohibition.
[0045]
Further, the determination result in step 4 is S ₂ = 0, that is, if the number of copyable generations is 1, the process proceeds to step 6 and S ₁ = 1 copyright information S ₁ And S ₂ = 1 generation information S ₂ Is generated from the encoder 16, and a recording control signal indicating copy permission is generated in step 7.
[0046]
In the recording system of the video tape recorder, the recording signal processing circuit 11 performs a recording signal generation process in accordance with a recording control signal generated by the control unit 15, and a recording control signal indicating copy permission. Is supplied from the control unit 15, the copyright information S ₁ And generation information S ₂ To generate a recording signal for the input video signal on which is superimposed. The recording signal processing circuit 11 stops the recording signal generation process when a recording control signal indicating copy prohibition is supplied from the control unit 15.
[0047]
In a video tape recorder having a recording system having such a configuration, the copyright information S is added to the input video signal in a section other than the effective video section displayed on the screen. ₁ And generation information S ₂ Is superimposed by the superimposition processing unit 10, and the copyright information S ₁ And generation information S ₂ Can be recorded on the video tape 13 together with the video signal. Also, the copyright information S detected from the input video signal by the copy protection information detection unit 14 is used. ₁ And generation information S ₂ The recording control signal is generated by the control unit 15 based on the recording control signal, and the recording signal generation processing is performed by the recording signal processing circuit 11 according to the recording control signal. Only the video signal obtained can be recorded on the video tape 13.
[0048]
In the present invention, the copyright information S ₁ And generation information S ₂ Is superimposed on the video signal in the reproduction system of the video tape recorder. The playback system of this video tape recorder is configured, for example, as shown in FIG.
[0049]
The playback system of the video tape recorder shown in FIG. 23 includes a superimposition processing unit 24 to which a playback video signal obtained by a playback signal processing circuit 23 to which a playback head 22 that scans a recording track of a video tape 21 is connected is supplied. The copyright information S ₁ And generation information S ₂ Is output as a copy protection information.
[0050]
The superimposition processing unit 24 includes a copy protection information detection unit 25 that detects copy protection information superimposed on the reproduced video signal obtained by the reproduction signal processing circuit 23, and is detected by the copy protection information detection unit 25. Based on the copy protection information, new copy protection information is generated by the control unit 26, and the new copy protection information is transferred to the copyright information S by the encoder 27. ₁ And generation information S ₂ Into the copyright information S ₁ And generation information S ₂ Is superimposed on the reproduced video signal by the superimposition circuit 28 as copy protection information.
[0051]
Further, the control unit 26 performs copy generation control by generating copy protection information according to the procedure shown in the flowchart of FIG. 24 based on the copy protection information detected by the copy protection information detection unit 25. It has become.
[0052]
That is, the control unit 26 first determines in step 1 whether or not there is a copyright and the copy generation based on the copy protection information. If the result of the determination in step 1 is that there is no copyright, the process moves to step 2 and S ₁ = 0 copyright information S ₁ And S ₂ = 0 or S ₂ = 1 generation information S ₂ Is generated from the encoder 27 to generate copy protection information.
[0053]
If the result of the determination in step 1 is that there is a copyright and the number of copyable generations is 1, the process moves to step 3 and S ₁ = 1 copyright information S ₁ And S ₂ = 0 generation information S ₂ Is generated from the encoder 27 to generate copy protection information.
[0054]
Further, if the result of the determination in step 1 is that the copyright is present and the number of copyable generations is 0, the process proceeds to step 4 and S ₁ = 1 copyright information S ₁ And S ₂ = 1 generation information S ₂ Is generated from the encoder 27 to generate copy protection information.
[0055]
In a video tape recorder provided with such a reproduction system, the copyright information S is added to a section other than the effective video section displayed on the screen by the superposition processing section 24 with respect to the reproduced video signal reproduced from the video tape 21. ₁ And generation information S ₂ Can be output, and generation limits can be imposed when this reproduced video signal is recorded by a video tape recorder having a recording system as described above.
[0056]
Further, in the above description, the generation information S is assumed on the assumption that the SCMS restricts the copy of only one generation. ₂ Is 1 bit, but the generation information S ₂ May be multi-bit, and generation restriction may be performed such that copying over multiple generations is enabled.
[0057]
For example, as shown in FIG. 25, specific three bits of a video ID superimposed on the 20th line (the 20th line of the odd field) and the 283rd line (the 20th line of the even field) of the video signal of the NTSC system, respectively. , The 1-bit copyright information S ₁ And 2-bit generation information S ₂ May be transmitted.
[0058]
As shown in FIG. 26, the video ID is obtained from a wide ID (2-bit data A), a mode number (4-bit data B), data or a flag (8-bit data C), and an error check code (6-bit data D). 20 bits.
[0059]
The wide ID (2-bit data A) is identification information relating to the transmission format of the video signal. As shown in Table 2, whether the transmission aspect ratio is 16: 9 or 4: 3 Is indicated by the first bit, and whether the image display format is the letterbox format or the standard format is indicated by the second bit.
[0060]
[Table 2]

[0061]
The mode number (4-bit data B) is identification information for sorting the data or flag (8-bit data C) into 16 types of data. Define as data etc.
[0062]
[Table 3]

[0063]
That is, when the mode number is [0000], it indicates that the 8-bit data C is a system flag. When the mode number is [0001], the 8-bit data C is the date of shooting. Indicates the value of the year. Similarly, [1100] indicates the start of a character string, [1101] indicates that the 8-bit data C is character data, and [1110] indicates the end of the character string. Thereby, character information such as a program title can be recorded and transmitted.
[0064]
The 8-bit data C defined by the mode number [0000], that is, the system flag indicates the status of the image. As shown in Table 4, bit 0 is the copyright information S. ₁ , And bit 1 and bit 2 are the generation information S ₂ , Bit 3 is assigned to information indicating whether or not the image is a stereoscopic (3D) image, and bit 7 is assigned to information indicating whether or not there is a caption in a black area of the letter box.
[0065]
[Table 4]

[0066]
Here, the information assigned to the bit 3 is a 3D image in which an image having left and right parallax is recorded in an odd field and an even field, and stereoscopic viewing is performed by switching the odd field and the even field with a liquid crystal shutter or the like during reproduction. Used to control the mode. Also, the information assigned to bit 7 is that if the subtitles are in the black area of the letterbox, the subtitles disappear when zoomed on the screen with a wide aspect ratio. , And is displayed in another area.
[0067]
Then, the copyright information S assigned to the bit 0 is ₁ Indicates the presence or absence of the copyright by “1/0”. The generation information S assigned to the bit 1 and the bit 2 ₂ Is, as shown in Table 5, ₂ = 11 indicates the number of copyable generations [3]. ₂ = 10 indicates the number of copyable generations [2]. ₂ = 01 indicates the number of copyable generations [1]. ₂ = 00 indicates the number of copyable generations "0".
[0068]
[Table 5]

[0069]
In this example, the one-bit copyright information S ₁ And 2-bit generation information S ₂ Can be used to limit copy generation as shown in Table 6.
[0070]
[Table 6]

[0071]
That is, for example, as shown in FIG. 27, the video signal supplied from the video source 30 has copyright information S indicating that there is no copyright. ₁ = 0, the generation information S ₂ Is any of 00, 01, 10, and 11, the recording of the video signal by the first video tape recorder 31 is permitted, and the recorded video tape on which the video signal is recorded is transferred to another video tape. Dubbing the video signal, that is, copying the video signal from the first video tape recorder 31 to the second video tape recorder 32 or dubbing the video signal from the second video tape recorder 32 to the third video tape recorder 33 Can also be copied.
[0072]
Further, as shown in FIG. 28, for example, the copyright information S indicating that the video signal supplied from the video source 30 has the copyright is provided. ₁ = 1 and generation information S indicating that the number of copyable generations is [0] ₂ When = 00 is superimposed, the recording of the video signal on the video tape by the first video tape recorder 31 is prohibited.
[0073]
Further, as shown in FIG. 29, for example, copyright information S indicating that the video signal supplied from the video source 30 has a copyright is provided. ₁ = 1 and generation information S indicating that the number of copyable generations is [1] ₂ When = 01 is superimposed, the first video tape recorder 31 permits the video signal to be recorded on a video tape.
[0074]
In the first video tape recorder 31, copyright information S indicating that there is a copyright is provided. ₁ = 1 and decrement the copyable generation number to indicate that the copyable generation number is [0]. ₂ = 00 is superimposed on the video signal and the copyright information S ₁ And generation information S ₂ Is recorded on a video tape together with the video signal. When the video signal recorded by the first video tape recorder 31 is reproduced, the reproduced video signal includes copyright information S indicating that there is a copyright. ₁ = 1 and generation information S indicating that the number of copyable generations is [0] ₂ = 00 is superimposed, so that the video signal is dubbed from the recorded video tape on which the video signal is recorded to another video tape, that is, from the first video tape recorder 31 to the second video tape recorder 32. Copying of the video signal is prohibited.
[0075]
That is, copyright information S indicating that there is a copyright ₁ = 1 and generation information S indicating that the number of copyable generations is [1] ₂ By superimposing = 01 on the video signal, it is possible to restrict generations by permitting copying of only one generation and prohibiting copying of two or more generations.
[0076]
Further, as shown in FIG. 30, for example, the copyright information S indicating that the video signal supplied from the video source 30 indicates that the copyright exists. ₁ = 1 and generation information S indicating that the number of copyable generations is [2] ₂ In the case where = 10 is superimposed, recording of the video signal on a video tape by the first video tape recorder 31 is permitted.
[0077]
In the first video tape recorder 31, copyright information S indicating that there is a copyright is provided. ₁ = 1 and the number of copyable generations is decremented, and generation information S indicating that the number of copyable generations is [1] ₂ [01] is superimposed on the video signal and the copyright information S ₁ And generation information S ₂ Is recorded on a video tape together with the video signal. When the video signal recorded by the first video tape recorder 31 is reproduced, the reproduced video signal includes copyright information S indicating that there is a copyright. ₁ = 1 and generation information S indicating that the number of copyable generations is [1] ₂ = 01 is superimposed, so that dubbing of the video signal from the recorded video tape on which the video signal is recorded to another video tape, that is, from the first video tape recorder 31 to the second video tape recorder 32 is performed. Copying of the video signal is permitted.
[0078]
In the second video tape recorder 32, copyright information S indicating that there is a copyright is provided. ₁ = 1 and decrement the copyable generation number to indicate that the copyable generation number is [0]. ₂ [00] is superimposed on the video signal and the copyright information S ₁ And generation information S ₂ Is recorded on a video tape together with the video signal. When the video signal recorded by the second video tape recorder 32 is reproduced, the reproduced video signal includes copyright information S indicating that there is a copyright. ₁ = 1 and generation information S indicating that the number of copyable generations is [0] ₂ = 00 is superimposed, so that the video signal is dubbed from the recorded video tape on which the video signal is recorded to another video tape, that is, from the second video tape recorder 32 to the third video tape recorder 33. Copying of the video signal is prohibited.
[0079]
That is, copyright information S indicating that there is a copyright ₁ = 1 and generation information S indicating that the number of copyable generations is [2] ₂ By superimposing “= 10” on the video signal, it is possible to permit generations up to two generations and restrict generations that prohibit three or more generations.
[0080]
Further, for example, as shown in FIG. 31, copyright information S indicating that the video signal supplied from the video source 30 has a copyright is provided. ₁ = 1 and generation information S indicating that the number of copyable generations is [3] ₂ When = 11 is superimposed, recording of the video signal on the video tape by the first video tape recorder 31 is permitted.
[0081]
In the first video tape recorder 31, copyright information S indicating that there is a copyright is provided. ₁ = 1 and generation information S indicating that the number of copyable generations is [2] by decrementing the number of copyable generations ₂ [10] is superimposed on the video signal and the copyright information S ₁ And generation information S ₂ Is recorded on a video tape together with the video signal. When the video signal recorded by the first video tape recorder 31 is reproduced, the reproduced video signal includes copyright information S indicating that there is a copyright. ₁ = 1 and generation information S indicating that the number of copyable generations is [2] ₂ = 10 is superimposed, so that the video signal is dubbed from the recorded video tape on which the video signal is recorded to another video tape, that is, from the first video tape recorder 31 to the second video tape recorder 32. Copying of the video signal is permitted.
[0082]
In the second video tape recorder 32, copyright information S indicating that there is a copyright is provided. ₁ = 1 and the number of copyable generations is decremented, and generation information S indicating that the number of copyable generations is [1] ₂ [01] is superimposed on the video signal and the copyright information S ₁ And generation information S ₂ Is recorded on a video tape together with the video signal. When the video signal recorded by the second video tape recorder 32 is reproduced, the reproduced video signal includes copyright information S indicating that there is a copyright. ₁ = 1 and generation information S indicating that the number of copyable generations is [1] ₂ = 01 is superimposed, so that the video signal is dubbed from the recorded video tape on which the video signal is recorded to another video tape, that is, from the second video tape recorder 32 to the third video tape recorder 33. Copying of the video signal is permitted.
[0083]
In the third video tape recorder 33, copyright information S indicating that there is a copyright is provided. ₁ = 1 and decrement the copyable generation number to indicate that the copyable generation number is [0]. ₂ = 00 is superimposed on the video signal and the copyright information S ₁ And generation information S ₂ Is recorded on a video tape together with the video signal. When the video signal recorded by the third video tape recorder 33 is reproduced, the reproduced video signal includes copyright information S indicating that there is a copyright. ₁ = 1 and generation information S indicating that the number of copyable generations is [0] ₂ = 00 is superimposed, so that the video signal is dubbed from the recorded video tape on which the video signal is recorded to another video tape, that is, the third video tape recorder 33 transfers the fourth video tape recorder 34 to the other video tape. Copying of the video signal is prohibited.
[0084]
That is, copyright information S indicating that there is a copyright ₁ = 1 and generation information S indicating that the number of copyable generations is [3] ₂ By superimposing = 11 on the video signal, it is possible to restrict generations by permitting copying of up to three generations and prohibiting copying of four or more generations.
[0085]
Thus, the generation information S ₂ Is multi-bit, it is possible to limit generations that permit copying over multiple generations.
[0086]
【The invention's effect】
As described above, according to the present invention, the reproduction image information in which the copyright information and the generation information are superimposed on the section other than the effective video section displayed on the screen of the image information reproduced from the recording medium by the superimposition processing means is output. Depending on whether or not there is a copyright, not only permission / prohibition of copying but also generation restriction of copying can be performed.
[Brief description of the drawings]
FIG. 1 is a waveform diagram showing an example of a video signal processed according to the present invention.
FIG. 2 is a waveform diagram showing a superimposed state of copyright information in the example of FIG.
FIG. 3 is a waveform chart showing a superimposed state of generation information in the example of FIG. 1;
FIG. 4 is a waveform chart showing another example of a video signal processed according to the present invention.
FIG. 5 is a waveform diagram showing a superimposed state of copyright information in the example of FIG. 4;
FIG. 6 is a waveform chart showing a superimposed state of generation information in the example of FIG. 4;
FIG. 7 is a waveform diagram showing another example of a video signal processed according to the present invention.
8 is a waveform diagram showing a superimposed state of copyright information in the example of FIG.
FIG. 9 is a waveform diagram showing another example of a video signal processed according to the present invention.
10 is a waveform diagram showing a superimposed state of copyright information in the example of FIG.
11 is a waveform chart showing another superimposed state of the copyright information and the generation information in the example of FIG. 9;
12 is a waveform chart showing another superimposed state of the copyright information and the generation information in the example of FIG.
FIG. 13 is a waveform diagram showing another example of a video signal processed according to the present invention.
14 is a waveform diagram showing a superimposed state of copyright information and generation information in the example of FIG.
FIG. 15 is a waveform chart showing another example of a video signal processed according to the present invention.
16 is a waveform diagram showing a superimposed state of copyright information and generation information in the example of FIG.
FIG. 17 is a waveform diagram showing an example of a state where copyright information and generation information are superimposed on an HD video signal processed according to the present invention.
FIG. 18 is a block diagram for explaining a usage mode of copyright information and generation information in the present invention.
FIG. 19 is a block diagram for explaining another mode of use of copyright information and generation information in the present invention.
FIG. 20 is a block diagram for explaining another usage mode of the copyright information and the generation information in the present invention.
FIG. 21 is a block diagram illustrating a configuration example of an image information recording device that records copyright information and generation information.
FIG. 22 is a flowchart showing an operation of a control unit in the image information recording device.
FIG. 23 is a block diagram illustrating a configuration example of an image information reproducing device according to the present invention.
FIG. 24 is a flowchart showing an operation of a control unit in the image information reproducing device.
FIG. 25 is a waveform chart showing another example of a video signal processed according to the present invention.
26 is a waveform diagram showing a superimposed state of copyright information and generation information in the example of FIG. 25.
FIG. 27 is a block diagram for explaining a mode of use of copyright information and generation information in the example of FIG. 25;
FIG. 28 is a block diagram for explaining another mode of use of the copyright information and the generation information in the example of FIG. 25.
FIG. 29 is a block diagram for explaining a mode of use of copyright information and generation information in the example of FIG. 25;
FIG. 30 is a block diagram for explaining another mode of use of the copyright information and the generation information in the example of the example of FIG. 25.
FIG. 31 is a block diagram for explaining another mode of use of the copyright information and the generation information in the example of FIG. 25;
[Explanation of symbols]
1,4 television tuner, 2,3,5,6,8 video tape recorder, 7 video disc player, 10,24 superimposition processing unit, 11 recording signal processing circuit, 12 recording head, 13,21 video tape, 14, 25 copy protection information detection unit, 15, 26 control unit, 16, 27 encoder, 17, 28 superimposition circuit, 18 synchronization separation circuit, 19 timing generator, 20 decoder, 22 reproduction head, 23 reproduction signal processing circuit, 30 video source, 31, 32, 33 Video tape recorder

Claims (22)

A video signal processing method for processing a video signal,
The video signal is a non-image section including an effective image section including display image information and a vertical blanking section data (VBID) including a plurality of bits of a mode number and a plurality of bits of data or a data flag associated with the mode number. And having
The mode number of the plurality of bits is a data or flag of the data or data flag of the plurality of bits so that a predetermined bit of the data or the data flag of the plurality of bits indicates different information by the classification function of the mode number of the plurality of bits. Selectively classified as
Generating copyright information indicating whether the display image information has a copyright,
A step of generating generation information indicating whether a copy generated from the processed video signal can be generated for one generation when the display image has a copyright,
Assigning the copyright information and the generation information to the predetermined bits when the mode number of the plurality of bits classifies the associated data or data flag of the plurality of bits as a flag, and generating the processed video signal And a video signal processing method. The video signal processing method according to claim 1, wherein the video signal has a line section, and the copyright information and the generation information are superimposed on the VBID data in different line sections, respectively. 3. The video signal processing method according to claim 2, wherein the video signal includes a frame section composed of a field section, and the different line sections are in the same field section. 3. The video signal processing method according to claim 2, wherein the video signal comprises a frame section composed of a field section, and the different line sections are different field sections in the same frame section. The video signal processing method according to claim 1, wherein the video signal has a line section, and the copyright information and the generation information are superimposed on the VBID in the same line section. A video signal reproducing method for reproducing a video signal,
The video signal has an effective image section and a non-image section, and indicates whether or not the display image information generated from the video signal has a copyright. Has copy protection information indicating whether a copy can be generated for one generation from the video signal,
Reproducing the video signal from a recording medium;
Detecting the copy protection information from the reproduced video signal;
Generating copyright information indicating whether or not the video signal has a copyright based on the copy protection information;
When the display image has a copyright, a step of generating, based on the copy protection information, generation information indicating whether a copy generated from the processed video signal can be generated for one generation,
The multi-bit data flag and the multi-bit mode number included in the vertical blanking interval data (VBID) are used to add the copyright information and the generation to the predetermined bits of the multi-bit data flag classified in association with the mode number. Assigning both pieces of information;
Allocating the VBID data to a non-image section of the reproduced video signal. 7. The video signal reproducing method according to claim 6, wherein the video signal has a line section, and the copyright information and the generation information are superimposed on the VBID data in different line sections, respectively. 8. The video signal reproducing method according to claim 7, wherein the video signal comprises a frame section composed of a field section, and the different line sections are within the same field section. The video signal reproducing method according to claim 7, wherein the video signal comprises a frame section composed of a field section, and the different line sections are different field sections within the same frame section. 7. The video signal reproducing method according to claim 6, wherein the video signal has a line section, and the copyright information and the generation information are superimposed on the VBID in the same line section. The copy protection information includes recorded copyright information and recorded generation information, and the recorded copyright information and the recorded generation information correspond to the non-image of the video signal on the recording medium. 7. The video signal reproducing method according to claim 6, wherein the section is included as VBID data and is detected to be assigned to the VBID data of the reproduced video signal as the predetermined bit. A video signal processing device for processing a video signal,
The video signal is a non-image section including an effective image section including display image information and a vertical blanking section data (VBID) including a plurality of bits of a mode number and a plurality of bits of data or a data flag associated with the mode number. And having
The mode number of the plurality of bits is a data or flag of the data or data flag of the plurality of bits so that a predetermined bit of the data or the data flag of the plurality of bits indicates different information by the classification function of the mode number of the plurality of bits. Selectively classified as
Means for generating copyright information indicating whether the display image information has a copyright,
Means for generating generation information indicating whether a copy generated from the processed video signal can be generated for one generation when the display image information has a copyright,
When the multi-bit mode number classifies the related multi-bit data or data flag as a flag, the copyright information and the generation information are assigned to the predetermined bits to generate the processed video signal. And a video signal processing device. 13. The video signal processing device according to claim 12, wherein the video signal has a line section, and the copyright information and the generation information are superimposed on the VBID data in different line sections, respectively. 14. The video signal processing apparatus according to claim 13, wherein the video signal is composed of a frame section composed of a field section, and the different line sections are in the same field section. 14. The video signal processing apparatus according to claim 13, wherein the video signal includes a frame section composed of a field section, and the different line sections are different field sections in the same frame section. 13. The video signal processing device according to claim 12, wherein the video signal has a line section, and the copyright information and the generation information are superimposed on the VBID in the same line section. A video signal reproducing device for reproducing a video signal,
The video signal has an effective image section and a non-image section, and indicates whether an image generated by the video signal is copyrighted, and whether a continuous generation of copies can be generated from the video signal. Has copy protection information indicating whether or not
Means for reproducing the video signal from a recording medium;
Means for detecting the copy protection information from the reproduced video signal,
Means for generating copyright information indicating whether or not the video signal has a copyright based on the copy protection information;
Means for generating, based on the copy protection information, generation information indicating whether a copy generated from the processed video signal can be generated for one generation when the display image has a copyright,
According to the multi-bit data flag and the multi-bit mode number included in the vertical blanking interval data (VBID), the copyright information and the generation are added to predetermined bits of the multi-bit data flag classified in association with the mode number. Means for assigning both pieces of information;
Means for allocating the VBID data to a non-image section of the reproduced video signal. 18. The video signal reproducing apparatus according to claim 17, wherein the video signal has a line section, and the copyright information and the generation information are superimposed on the VBID data in different line sections. 19. The video signal reproducing apparatus according to claim 18, wherein the video signal is composed of a frame section composed of a field section, and the different line sections are in the same field section. 19. The video signal reproducing apparatus according to claim 18, wherein the video signal is composed of a frame section composed of a field section, and the different line sections are different field sections in the same frame section. 18. The video signal reproducing apparatus according to claim 17, wherein the video signal has a line section, and the copyright information and the generation information are superimposed on the VBID in the same line section. The copy protection information includes recorded copyright information and recorded generation information, and the recorded copyright information and the recorded generation information correspond to the non-image of the video signal on the recording medium. 18. The video signal reproducing device according to claim 17, wherein the video signal reproducing device is included as VBID data in a section and is detected to be assigned to the VBID data of the reproduced video signal as the predetermined bit.

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