JP3743657B2 - Audio disc and audio signal decoding apparatus - Google Patents

Description

その他：保留
【０１０９】
図４２（Ａ）に示したＡＴＳ−ＰＧＣＩＴ（ＡＴＳプログラム・チェーン・インフォメーション・テーブル）は、図５６に詳しく示すように先頭から順に
・図５７に詳しく示すオーディオ・タイトルセットＰＧＣＩテーブル・インフォメーション（ＡＴＳ−ＰＧＣＩＴＩ）と、
・図５８、図５９に詳しく示すｎ個のオーディオ・タイトルセットＰＧＣＩサーチポインタ（ＡＴＳ−ＰＧＣＩ−ＳＲＰ＃１〜＃ｎ）と、
・図６０に詳しく示す複数のオーディオ・タイトルセットＰＧＣＩにより構成されている。
【０１１０】
ＡＴＳ−ＰＧＣＩＴＩは図５７に詳しく示すように８バイトで構成され、先頭から順に
・２バイトのＡＴＳ−ＰＧＣＩ−ＳＲＰ＃１〜＃ｎの数と、
・２バイトの保留領域と、
・４バイトのＡＴＳ−ＰＧＣＩＴのエンドアドレスにより構成されている。ＡＴＳ−ＰＧＣＩ−ＳＲＰ＃１〜＃ｎの各々は、図５８に詳しく示すように８バイトで構成され、先頭から順に
・図５９に詳しく示すように４バイトのＡＴＳ−ＰＧＣのカテゴリ（ＡＴＳ−ＰＧＣ−ＣＡＴ）と、
・４バイトのＡＴＳ−ＰＧＣＩのエンドアドレスにより構成されている。
【０１１１】
上記の４バイト（ｂ３１〜ｂ０）のＡＴＳ−ＰＧＣのカテゴリは、図５９に詳しく示すように先頭から順に
・１ビット（ｂ３１）のエントリータイプと、
・７ビット（ｂ３０〜ｂ２４）のＡＴＳオーディオタイトル数（ＡＴＳ−ＴＴＮ）と、
・２ビット（ｂ２３、ｂ２２）のブロックモードと、
・２ビット（ｂ２１、ｂ２０）のブロックタイプと、
・４ビット（ｂ１９〜ｂ１６）のオーディオチャネル数と、
・８ビット（ｂ１５〜ｂ８）のオーディオ符号化モードと、
・８ビット（ｂ７〜ｂ０）の保留領域により構成されている。
【０１１２】
上記カテゴリ（ＡＴＳ−ＰＧＣ−ＣＡＴ）の内容を以下に詳しく示す。
（１）エントリータイプ（ｂ３１）
０ｂ：エントリーＰＧＣでない
１ｂ：エントリーＰＧＣ
（２）ＡＴＳオーディオタイトル数（ｂ３０〜ｂ２４）
このＡＴＳのオーディオタイトル数を「１」〜「９９」の範囲で記述する。
（３）ブロックモード（ｂ２３、ｂ２２）
００ｂ：ＡＴＳ−ＰＧＣブロックのＡＴＳ−ＰＧＣでない
０１ｂ：ＡＴＳ−ＰＧＣブロックの最初のＡＴＳ−ＰＧＣ
１０ｂ：保留
１１ｂ：ＡＴＳ−ＰＧＣブロックの最後のＡＴＳ−ＰＧＣ
（４）ブロックタイプ（ｂ２１、ｂ２０）
００ｂ：このブロックの一部でない
０１ｂ：オーディオコーディングモードのみの差分のブロック
１０ｂ：オーディオチャネルのみの差分のブロック
１１ｂ：オーディオコーディングモードとオーディオチャネルの両方の差分のブロック
（５）オーディオチャネル数（ｂ１９〜ｂ１６）
００００ｂ：２チャネル以下
０００１ｂ：２チャネルを越える
【０１１３】
図５６に示したオーディオ・タイトルセットＰＧＣＩ（ＡＴＳ−ＰＧＣＩ）の各々は、図６０に詳しく示すように先頭から順に
・図６１、図６２に詳しく示すＡＴＳ−ＰＧＣジェネラル・インフォメーション（ＡＴＳ−ＰＧＣ−ＧＩ）と、
・図５５〜図５７に詳しく示すＡＴＳプログラム・インフォメーション・テーブル（ＡＴＳ−ＰＧＩＴ）と、
・図５８〜図６０に詳しく示すＡＴＳセル・プレイバック・インフォメーション・テーブル（ＡＴＳ−Ｃ−ＰＢＩＴ）により構成されている。
【０１１４】
ＡＴＳ−ＰＧＣ−ＧＩは図６１に詳しく示すように１６バイト（ＲＢＰ０〜１５）で構成され、先頭から順に
・図６２に詳しく示す４バイト（ＲＢＰ０〜３）のＡＴＳ−ＰＧＣコンテンツ（ＡＴＳ−ＰＧＣ−ＣＮＴ）と、
・４バイト（ＲＢＰ４〜７）のＡＴＳ−ＰＧＣプレイバック・タイム（ＡＴＳ−ＰＧＣ−ＰＢ−ＴＭ）と、
・２バイト（ＲＢＰ８、９）の保留領域と、
・２バイト（ＲＢＰ１０、１１）のＡＴＳ−ＰＧＩＴのスタートアドレスと、
・２バイト（ＲＢＰ１２、１３）のＡＴＳ−Ｃ−ＰＢＩＴのスタートアドレスと、
・２バイト（ＲＢＰ１４、１５）の保留領域により構成されている。
【０１１５】
上記の４バイト（ｂ３１〜ｂ０）のＡＴＳ−ＰＧＣコンテンツは図６２に詳しく示すように先頭から順に
・１７ビット（ｂ３１〜ｂ１５）の保留領域と、
・７ビット（ｂ１４〜ｂ８）のプログラム数と、
・８ビット（ｂ７〜ｂ０）のセル数により構成されている。プログラム数は「１」〜「９９」の範囲であり、セル数は「１」〜「２５５」の範囲である。
【０１１６】
図６０に示したＡＴＳプログラム・インフォメーション・テーブル（ＡＴＳ−ＰＧＩＴ）は、図６３に詳しく示すようにｎ個のＡＴＳプログラム・インフォメーション（ＡＴＳ−ＰＧＩ）＃１〜＃ｎにより構成されている。ＡＴＳ−ＰＧＩ＃１〜＃ｎの各々は図６４に詳しく示すように２０バイト（ＲＢＰ０〜１９）で構成され、先頭から順に
・図６５に詳しく示す４バイト（ＲＢＰ０〜３）のＡＴＳ−ＰＧコンテンツ（ＡＴＳ−ＰＧ−ＣＮＴ）と、
・１バイト（ＲＢＰ４）のＡＴＳ−ＰＧのエントリセル番号と、
・１バイト（ＲＢＰ５）の保留領域と、
・４バイト（ＲＢＰ６〜９）のＡＴＳ−ＰＧの最初のオーディオセルのスタート・プレゼンテーション・タイム（ＦＡＣ−Ｓ−ＰＴＭ）と、
・４バイト（ＲＢＰ１０〜１３）のＡＴＳ−ＰＧプレイバック・タイムと、
・４バイト（ＲＢＰ１４〜１７）のＡＴＳ−ＰＧポーズ・タイムと、
・１バイト（ＲＢＰ１８）の保留領域（著作権管理データＣＭＩ用）と、
・１バイト（ＲＢＰ１９）の保留領域
により構成されている。
【０１１７】
上記２バイト（ｂ３１〜０）のＡＴＳ−ＰＧコンテンツは、図６５に詳しく示すように先頭から順に
・１ビット（ｂ３１）の、前回と今回のＰＧの関係（Ｒ／Ａ）と、
・１ビット（ｂ３０）のＳＴＣ不連続性フラグ（ＳＴＣ−Ｆ）と、
・３ビット（ｂ２９〜ｂ２７）のアトリビュート数（ＡＴＲＮ）と、
・３ビット（ｂ２６〜ｂ２４）のチャネルグループ（ＣｈＧｒ）「２」のビットシフトデータと、
・２ビット（ｂ２３、ｂ２２）の保留領域と、
・１ビット（ｂ２１）のダウンミックスモード（Ｄ−Ｍ）と、
・１ビット（ｂ２０）のダウンミックス係数の有効性（図示※）と、
・４ビット（ｂ１９〜ｂ１６）のダウンミックス係数テーブル番号（ＤＭ−ＣＯＥＦＴＮ）と、
・各々が１ビット、合計１６ビット（ｂ１５〜ｂ０）のＲＴＩフラグＦ１５〜Ｆ０により構成されている。
【０１１８】
図６０に示したＡＴＳセル・プレイバック・インフォメーション・テーブル（ＡＴＳ−Ｃ−ＰＢＩＴ）は、図６６に詳しく示すようにｎ個のＡＴＳセル・プレイバック・インフォメーション（ＡＴＳ−Ｃ−ＰＢＩ）＃１〜＃ｎにより構成されている。ＡＴＳ−Ｃ−ＰＢＩ＃１〜＃ｎの各々は、図６７に詳しく示すように１２バイト（ＲＢＰ０〜１１）により構成され、先頭から順に
・１バイト（ＲＢＰ０）のＡＴＳ−Ｃのインデックス番号と、
・図６８に詳しく示すように１バイト（ＲＢＰ１）のＡＴＳ−Ｃタイプ（ＡＴＳ−Ｃ−ＴＹ）と、
・２バイト（ＲＢＰ２、３）の保留領域と、
・４バイト（ＲＢＰ４〜７）のＡＴＳ−Ｃのスタートアドレスと、
・４バイト（ＲＢＰ８〜１１）のＡＴＳ−Ｃのエンドアドレスにより構成されている。
【０１１９】
１バイト（ｂ７〜ｂ０）のＡＴＳ−Ｃタイプは、図６８に詳しく示すように先頭から順に
・２ビット（ｂ７、ｂ６）のＡＴＳセル要素（ＡＴＳ−Ｃ−ＣＯＭＰ）と、
・２ビット（ｂ５、ｂ４）の保留領域と、
・４ビット（ｂ３〜ｂ０）のＡＴＳセル用途（ＡＴＳ−Ｃ−Usage）により構成されている。
【０１２０】
上記データの内容を以下に詳しく示す。
（１）ＡＴＳセル要素（ｂ７、ｂ６）
００ｂ：オーディオデータのみから成るオーディオセル
０１ｂ：オーディオデータとリアルタイムインフォメーションから成るオーディオセル
１０ｂ：サイレンス用のオーディオデータのみから成るサイレンスセル
１１ｂ：スチルピクチャのみから成るピクチャセル
（２）ＡＴＳセル用途（ｂ３〜ｂ０）
００００ｂ：記述無し
０００１ｂ：スポットライトパート
その他 ：保留
【０１２１】
次の本発明に適用されるエンコード装置について説明する。図６９、図７０はそれぞれエンコード装置の構成と処理を示している。アナログオーディオ信号ＡはＡ／Ｄコンバータ３１により十分高いサンプリング周波数（サンプリング周期Δｔ）、例えば１９２ｋＨｚでサンプリングされて、例えば２４ビットの高分解能のＰＣＭ信号に変換される。続くビットシフト／信号処理回路３２では、圧縮を行わない場合には、Ａ／Ｄコンバータ３１により変換されたＰＣＭデータがそのままＤＶＤフォーマット化部３４に印加される。これに対し、圧縮を行う場合には、Ａ／Ｄコンバータ３１により変換されたＰＣＭデータがその符号化モードに応じてビットシフト／信号処理回路３２により圧縮され、次いでＤＶＤフォーマット化部３４に印加される（ステップＳ５、Ｓ６）。ビットシフト／信号処理回路３２ではまた、グループ「２」の各チャネルがビットシフトされる。
【０１２２】
また、ビデオ信号ＶはＡ／Ｄ変換器３１Ｖによりデジタル信号に変換され、次いでこのデジタルビデオ信号がＶエンコーダ３２ＶによりＭＰＥＧフォーマットにエンコードされ、ＤＶＤフォーマット化部３４に印加される（ステップＳ１、Ｓ２）。また、静止画信号ＳＰはＡ／Ｄ変換器３１ＳＰによりデジタル信号に変換され、次いでこのデジタル静止画信号ＳＰが圧縮エンコーダ３２ＳＰによりＭＰＥＧフォーマットにエンコードされ、ＤＶＤフォーマット化部３４に印加される（ステップＳ３、Ｓ４）。また、著作権情報とリアルタイムテキスト情報（ＲＴＩ）がインタフェース（Ｉ／Ｆ）４０を介して（ステップＳ７、Ｓ８）、また、文字情報とディスク識別子ＥＸがＤＶＤフォーマット化部３４に印加される（ステップＳ９、Ｓ１０）。
【０１２３】
そしてＤＶＤフォーマット化部３４は、前述したようなフォーマットにパッキングする（ステップＳ１１）。このＤＶＤフォーマット化部３４によりフォーマット化されたデータは、変調回路３５によりディスクに応じた変調方式で変調されてこの変調データに基づいてディスクが製造されたり、記録部３８にいったん記録されたり、通信Ｉ／Ｆ３９を介して伝送される（ステップＳ１２）。
【０１２４】
図７１は本発明に係るデコード装置の具体的構成を示し、図７２は図７１の構成を機能的に示している。また、図７３はその処理を示している。図７１、図７２において、まず、図１９に示す場合と同様に、操作部１８やリモコン装置１９により曲目選択、再生、早送り、停止操作が行われると、制御部２３はその操作に応じてドライブ装置２と再生装置１７を制御し、再生時にはＤＶＤオーディオディスク１に記録されたピットデータがドライブ装置２により読み取られた後、ＥＦＭ復調される。
【０１２５】
再生装置１７では、この信号が静止画及びＶパック検出部３とＡ及びＲＴＩパック検出部９に送られる。静止画パック、Ｖパックがディスク１に記録されている場合には、静止画及びＶパック検出部３はこの再生データ中の静止画パック、Ｖパックを検出して制御パラメータをパラメータ部８に設定するとともに静止画パック、Ｖパックを静止画及びＶパックバッファ４に順次書き込む。静止画及びＶパックバッファ４に書き込まれた静止画パック、Ｖパック内のユーザデータ（ビデオ信号、静止画情報）は、バッファ取り出し部５により静止画パック、Ｖパック内のＳＣＲ（図１３参照）に基づいてパック順に、また、出力時刻順に取り出され、次いで伸長及び画像変換部６、Ｄ／Ａ変換部７、ビデオ出力端子１５、１５’を介してアナログビデオ信号として出力される。
【０１２６】
また、Ａ及びＲＴＩパック検出部９は再生データ中のＡパックとＲＴＩパックを検出して制御パラメータをパラメータ部１４に設定するとともに、ＡパックとＲＴＩパックをＡ及びＲＴＩパックバッファ１０に順次書き込む。Ａ及びＲＴＩパックバッファ１０に書き込まれたＡパック、ＲＴＩパック内のユーザデータ（オーディオ信号、リアルタイム・インフォメーション）は、バッファ取り出し部１１によりパック順に、また、出力時刻順に取り出される。そして、オーディオ信号はＰＣＭ変換及びビットシフト／信号処理部１２、Ｄ／Ａ変換部１３、オーディオ出力端子１６を介してアナログオーディオ信号として出力される。また、リアルタイム・インフォメーションは表示信号生成部２０に送られて表示信号が生成され、この表示信号は表示信号出力端子２２を介して出力されたり、内蔵の文字表示部２１に出力される。
【０１２７】
図７３を参照してこのデコード装置の処理を説明する。まず、ディスク１にアクセスして記録データを読み出し（ステップＳ２０）、次いで各分離ステップＳ２１〜Ｓ２９においてビデオ信号と、静止画信号と、オーディオ信号と、著作権情報及びリアルタイム情報（ＲＴＩ）と、文字情報及びディスク識別子（ＥＸ）が分離される。次いで各デコードステップＳ２２〜Ｓ３０においてそれぞれ各分離データがデコードされ、次いで同期再生される（ステップＳ３１、Ｓ３２）。
【０１２８】
ここで、静止画ＳＰを再生する処理には次の３通りがある。
１）静止画ＳＰが得られると、オーディオ信号Ａの再生を中断してミュートする。
２）静止画ＳＰが得られると、時間制御信号に基づいてオーディオ信号Ａと共に再生する。
３）静止画ＳＰが得られると、ユーザに指示されたページめくりコマンドに基づいてページめくり再生する。このときオーディオ信号Ａはそのまま再生する。
【０１２９】
静止画を音声に同期させる必要がある場合は、リアルタイムの同期のための時間制御信号は、図４２（Ｂ）のＡＴＳＩに追加して設けるスチルピクチャ・コントロール・インフォメーション・テーブルＳＰＣＩＴの下のタイム・コントロール・データ・インフォメーション（ＳＰＣＩＴ−ＴＣＤＩ）に置くようにする。
【０１３０】
また、さらにページめくりコマンドを収めたスチルピクチャ・ページ制御コマンド・インフォメーション（ＳＰＰＩ）をＳＰＣＩＴの下に置くようにする。このようにＳＰＣＩＴは、一般情報のＳＰＣＩＴジェネラル・インフォメーション（ＳＰＣＩＴ−ＧＩ）と、タイム・コントロール・データ・インフォメーション（ＳＰＣＩＴ−ＴＣＤＩ）と、スチルピクチャ・ページ制御コマンド・インフォメーション（ＳＰＰＩ）とから構成される。
【０１３１】
また、ここで、図４９のＳＰＣＴパックのスチル・ピクチャ・データの中に、スチルピクチャのページ制御するためのサイド情報を含むようにすることができる。このサイド情報により規定されたページ制御データをＳＰＰＩを参照しながら解釈して行うようにする。
【０１３２】
なお、スチル・ピクチャ・データに収めるには容量に余裕がない場合は、ＲＴＩパックのＲＴＩデータの中に、上記したスチルピクチャのページ制御するためのサイド情報を含むようにすることも許容できる。
【０１３３】
図７４は図４２（Ｂ）に示すように静止画を音声に同期させるため時間情報、ページめくりコマンドが記録されたＤＶＤオーディオディスクや、ＤＶＤビデオディスクなどのディスク１１０に記録されている信号を再生するための装置を示している。ディスクドライブ装置１１１はドライブ制御回路１１２により制御され、ディスク１１０はディスクドライブ装置１１１により駆動されて記録信号が読み出される。この信号は復調回路／誤り訂正回路１１３によりＥＦＭ復調され、次いで誤り訂正された後、制御データとＤＳＩデータを除くストリーム信号は書き込み制御回路１１５によりトラックバッファ１１４に書き込まれ、また、制御データとＤＳＩデータはそれぞれシステムバッファ１１７とＤＳＩバッファ１２２に書き込まれる。ＤＳＩバッファ１２２に書き込まれたデータはＤＳＩデコーダ１５１によりデコードされて出力される。
【０１３４】
システムコントローラ１３２はシステムバッファ１１７に書き込まれた制御データに基づいて再生制御を行う。システムコントローラ１３２には再生制御を行うために操作部１３０と、表示部１３１と、リード／ライト可能なシステムパラメータメモリ１３３と、再生専用のシステムパラメータメモリ１３４と、リード／ライト可能な汎用パラメータメモリ１３５とシステムタイマ１３６が接続されている。
【０１３５】
トラックバッファ１１４に書き込まれたストリーム信号は読み出し制御回路１１６により読み出され、次いでデマルチプレクサ１２８により静止画パックと、ＲＴＩパックと、ＶＢＶパックと、サブピクチャパックと、ＶＢＩパックと、オーディオパックに分離され、各パックがそれぞれ静止画バッファ１４７と、ＲＴＩバッファ１４８と、ＶＢＶバッファ１１８と、サブピクチャバッファ１１９と、ＶＢＩバッファ１２０と、オーディオバッファ１２１に蓄積される。そして、静止画パックとＲＴＩパックはそれぞれ静止画デコーダ１４９、ＲＴＩデコーダ１５０によりデコードされて出力され、また、ＲＴＩデコーダ１５０によりデコードされたＲＴＩデータはバッファ１５０’に蓄積される。
【０１３６】
ＶＢＶパックはビデオデコーダ１２３によりデコードされ、次いでレターボックス変換器１２６を介して加算器１２７に送られる。また、サブピクチャパック、ＶＢＩパックはそれぞれサブピクチャデコーダ１２４、ＶＢＩデコーダ１２５によりデコードされて加算器１２７に送られ、加算器１２７ではこれらのビデオ信号が合成される。また、オーディオパックはオーディオデコーダ１２９に送られ、その中のフォーマット分解器１４１、チャネル分離器１４２及びＤ／Ａ変換器１４４、１４５によりアナログ信号に変換される。
【０１３７】
次に図７５、図７６を参照して静止画の再生処理について説明する。この再生処理は２通り（タイプ「１」、「２」）の方法があり、図７５において、まず、再生が開始されると静止画データにアクセスして静止画バッファ１４７に蓄積する（ステップＳ６１）。このとき、１〜３秒間はオーディオデータを再生せずに無音のままとする。次いでタイプ「１」か否かを判別し（ステップＳ６２）、タイプ「１」の場合にはオーディオデータにアクセスして、図４２（Ｂ）に示すタイム・コントロール・データ・インフォメーション（ＳＰＣＩＴ−ＴＣＤＩ）すなわち時間制御情報に基づいて静止画データと同期再生する（ステップＳ６３）。他方、タイプ「１」でない場合にはオーディオデータにアクセスして再生する（ステップＳ６４）。
【０１３８】
このタイプ「２」の処理では、図７６に示すようにユーザコマンドにより割り込みが発生するとそのコマンドを解釈し（ステップＳ６５）、そのコマンドとスチルピクチャ・ページ制御コマンド・インフォメーション（ＳＰＰＩ）に応じて静止画の「次に進む」、「前に戻る」のページめくりや、「消去」、「拡大」などの再生を行う（ステップＳ６６）。このタイプ「２」における静止画の処理では、オーディオ信号とは同期せず、また、オーディオ信号の再生には影響を与えない。
【０１３９】
次に図７７、図７８を参照してオーディオデコーダ１２９の変形例について詳しく説明する。この変形例ではサンプルレート変換器１４３が追加されており、まず、オーディオパックがフォーマット分解器１４１により分解され、次いでチャネル分離器１４２により各チャネルのＰＣＭデータに分離される。そして、システムコントローラ１３２はフォーマット分解器１４１により分解されたオーディオデータのサンプリング周波数ｆｓを判断し、サンプリング周波数ｆｓが第１の系統の４８ｋＨｚの場合にはオーディオデータをチャネル分離器１４２からスイッチ１４６、１４７を介してそのままＤ／Ａ変換器１４４、１４５に送り、他方、第２の系統の４４．１ｋＨｚの場合にはサンプルレート変換器１４３により図７８（Ａ）に示すように第１の系統の４８ｋＨｚにアップサンプリングしたオーディオデータをスイッチ１４６、１４７を介してＤ／Ａ変換器１４４、１４５に送る。
【０１４０】
また、第１の系統の９６ｋＨｚの場合にもチャネル分離器１４２からスイッチ１４６、１４７を介してそのままＤ／Ａ変換器４４、４５に送られ、他方、第２の系統の８８．２ｋＨｚの場合にもサンプルレート変換器１４３により図７８（Ａ）に示すように第１の系統の９６ｋＨｚにアップサンプリングされてスイッチ１４６、１４７を介してＤ／Ａ変換器４４、４５に送られる。したがって、Ｄ／Ａ変換器１４４、１４５は第１の系統のみで構成することができる。なお、Ｄ／Ａ変換器１４４、１４５のサンプリング周波数ｆｓはシステムコントローラ１３２により制御される。
【０１４１】
なお、サンプリング周波数ｆｓを第２の系統から第１の系統に変換する代わりに、図７８（Ｂ）に示すように第１の系統の４８ｋＨｚ、９６ｋＨｚを第２の系統の４４．１ｋＨｚ、８８．２ｋＨｚに変換するようにしてもよい。また、マルチチャネル信号の各チャネルがサンプリング周波数ｆｓが第１の系統であっても、例えば図７８（Ｃ）に示すようにあるチャネルが４８ｋＨｚの場合には９６ｋＨｚにアップサンプリングし、全てのチャネルを９６ｋＨｚに揃えてＤ／Ａ変換することにより再生音質を向上させることができる。
【０１４２】
次に図７９、図８０を参照して著作権情報をスーパーインポーズ表示する再生装置について説明する。図７９において、静止画パックは静止画バッファ１４７を介して静止画デコーダ１４９に送られて静止画データがデコードされ、この静止画データは加算器２０１に印加される。また、ＲＴＩパックはＲＴＩバッファ１４８を介してＲＴＩデコーダ１５０に送られてデコードされ、デコードデータがバッファ１５０’に蓄積される。このとき、ＲＴＩパックが著作権データ（図４５、図４６に示すＵＰＣ／ＥＡＮ−ＩＳＲＣデータ）を含む場合、このテキスト文字情報が画像変換部２００により文字画像データに変換されて加算器２０１に印加されて静止画と合成されて外部に出力されるか、又はスイッチ２０３を介して外部に出力される。
【０１４３】
また、オーディオパックはオーディオバッファ１２１を介してフォーマット分解器１４１により分解され、各データがバッファ１４１’に蓄積される。このとき、オーディオパックが著作権データ（図４５、図４６に示すＵＰＣ／ＥＡＮ−ＩＳＲＣデータ）を含む場合、この著作権データがコード変換部２０２によりテキスト文字情報に変換され、スイッチ２０３を介して外部に出力される。
【０１４４】
図８０を参照して動作を説明する。まず、静止画の著作権情報の表示指示が操作部１３０から伝えられている場合には、静止画パックからデコードされた静止画とＲＴＩパックからデコードされて画像データに変換された著作権情報を加算器２０１により加算して出力する（ステップＳ７１→Ｓ７２）。他方、静止画の著作権情報の表示指示がない場合には、ＲＴＩパックからデコードされた著作権情報を加算せず（ステップＳ７１→Ｓ７３）、次いでオーディオ信号の著作権情報の表示指示が操作部１３０から伝えられているか否かを判断する（ステップＳ７４）。そして、表示指示が有る場合には、オーディオパックからデコードされた著作権情報をコード変換部２０２によりテキスト文字情報に変換してスイッチ２０３を介してＲＴＩ出力を行い（ステップＳ７４→Ｓ７５）、他方、表示指示がない場合にはＲＴＩ出力を行わない。なお、この処理はセル又はトラック単位で行う。
【０１４５】
ここで、図７７に示す構成のオーディオデコーダや、図７９に示す著作権情報再生装置（及びオーディオデコーダ）は、図７４に示すディスク再生装置の一部として組み込んで使用する方法の他に、製品単体としてＩＣチップ化して構成し、ＤＶＤビデオ再生装置やパーソナルコンピュータの部品として使用することができる。
【０１４６】
次に、上記のようにフォーマット化されたデジタルオーディオ信号を通信回線を介して伝送する例について説明する。まず、図８１〜図８５を参照して送信側であるパッキング装置について説明する。パッキング装置は図８１に示すようにパッキング処理部３０と、バッファメモリ３０Ｂと、コントロール回路２９と、操作部２７とディスプレイ２８を有する。そして、図８２〜図８５において、まず、ビデオ信号Ｖと、静止画信号ＳＰと、オーディオ信号Ａとリアルタイム情報ＲＴＩとディスク識別子（ＥＸ）が入力すると、ステップＳ１００では図８３に詳しく示すようにオーディオパックを生成し（ステップＳ１０１）、次いでビデオパックを生成し（ステップＳ１０２）、次いで静止画パックを生成し（ステップＳ１０３）、次いでリアルタイムテキストを生成する（ステップＳ１０４）。
【０１４７】
次いでセル（ＡＴＳ−Ｃ）を管理し（ステップＳ２００）、次いでＰＴＴ（パートオブタイトル）を管理し（ステップＳ３００）、次いでタイトル（ＡＯＴＴ−ＡＯＢ）を管理し（ステップＳ４００）、次いでタイトルセット（ＡＯＴＴ−ＡＯＢＳを管理する（ステップＳ５００）。続くステップＳ６００ではＡＴＳを生成するために、図８４に詳しく示すようにタイトルセットを生成し（ステップＳ６０１）、次いでメニューを生成する（ステップＳ６０２）。次いでＡＴＳ−ＰＧＣＩのカテゴリを記載し（ステップＳ６０３）、次いでビットシフトを含むＰＧコンテンツから成るＰＧＩＴを生成してＰＧＣＩを生成することによりＡＴＳ−ＰＧＣＩＴを生成する（ステップＳ６０４）。次いで属性、係数のＭＡＴを生成することによりＡＴＳＩを生成する（ステップＳ６０５）。次いでＡＭＧを生成し（ステップＳ７００）、最後にＴＯＣを生成する（ステップＳ８００）。
【０１４８】
次に、上記のようにフォーマット化されたデジタルオーディオ信号を通信回線を介して伝送する場合には、図８５に示すように、送信バッファに蓄えられている送信データを所定長に分割してパケット化し（ステップＳ４１）、次いでパケットの先頭には宛て先アドレスを含むヘッダを付与し（ステップＳ４２）、次いでこれをネットワーク上に出力する（ステップＳ４３）。
【０１４９】
次に図８６〜図９０を参照してデータ受信側について説明する。図８６に示すようにデータ受信側のアンパッキング装置は、アンパッキング処理部６０と、バッファメモリ６０Ｂと、パラメータメモリ５６と、コントロール回路５９と、操作部５７とディスプレイ５８を有する。まず、図８７に示すように、ネットワークから受信したパケットからヘッダを除去し（ステップＳ５１）、次いで受信データを復元し（ステップＳ５２）、次いでこれをメモリに転送する（ステップＳ５３）。
【０１５０】
次に図８８〜図９０に示すように、まず、ＡＭＧをデコードしてＡＴＳを検出し（ステップＳ１１００）、続くステップＳ１２００では目的のＡＴＳのＡＴＳＩをデコードするために、図８９に詳しく示すようにＡＴＳ−ＰＧＣＩのカテゴリをデコードし（ステップＳ１２０１）、次いでビットシフトを含むＰＧコンテンツから成るＰＧＩＴをデコードし（ステップＳ１２０２）、次いでＭＡＴの属性、係数をデコードし（ステップＳ１２０３）、次いでこれらのデコードした各パラメータをパラメータメモリ５６に設定する（ステップＳ１２０４）。
【０１５１】
次いで再生が開始されると、パックを識別し（ステップＳ１３００）、続くステップＳ１４００ではパックをデコードするために、図９０に詳しく示すようにオーディオパックをデコードし（ステップＳ１４０１）、次いでビデオパックをデコードし（ステップＳ１４０２）、次いで静止画パックをデコードし（ステップＳ１４０３）、次いでリアルタイムテキストをデコードする（ステップＳ１４０４）。そしてこれらの各パックからデコードしたオーディオ信号と、ビデオ信号と、静止画信号とリアルタイムテキスト信号を出力し（ステップＳ１５００）、再生中にはステップＳ１３００〜ステップＳ１５００の処理を繰り返す。
【０１５２】
上記エンコード装置及びデコード装置は、上記エンコード方法及びデコード方法をコンピュータプログラムとしてＲＯＭなどのＩＣチップに記憶しておき、このプログラムによりコンピュータのＣＰＵ（中央演算処理装置）を作動させることによっても実現できる。本発明はまた、ＤＶＤなどの記録媒体を介して伝送するのみならず、インターネットやカラオケ通信回線などの通信回線を介して伝送して再生側ではハードウエアやＰＣ上のアプリケーションにより処理する場合にも適用することができる。
【０１５３】
【発明の効果】
以上説明したように本発明によれば、ＤＶＤビデオタイトルセットと、前記ＤＶＤビデオタイトルセットを管理する情報を含む管理エリアの代わりに、再生制御用のパックを含まず、オーディオデータを有するＤＶＤオーディオタイトルセットと、前記ＤＶＤオーディオタイトルセットを管理する情報を含む管理エリアを設けたので、オーディオ信号を主として記録する場合に、ユーザにとって簡易に再生することができて使い勝手がよく、また、実時間の管理を簡単にすることができる。また、マルチチャネルのオーディオデータを２つのグループにわけてサンプリング周波数を割り当て、またビットシフトエンコードすることによりＳ／Ｎ比の向上とビット削減をするようにしたので、オーディオ信号の記録容量を確保しながらオーディオ信号の記録時間を所望に設定するために有効になる。
【図面の簡単な説明】
【図１】ＤＶＤ−ビデオのフォーマットと、第１の参考例に係るＤＶＤ−オーディオのフォーマットを示す説明図である。
【図２】図１のオーディオマネージャ（ＡＭＧ）のフォーマットを詳しく示す説明図である。
【図３】図１のオーディオタイトルセット（ＡＴＳ）のフォーマットを詳しく示す説明図である。
【図４】図２のオーディオマネージャインフォメーション（ＡＭＧＩ）のフォーマットを詳しく示す説明図である。
【図５】図４のオーディオタイトルセット・アトリビュートテーブル（ＡＴＳ−ＡＴＲＴ）のフォーマットを詳しく示す説明図である。
【図６】図５のオーディオタイトルセット・アトリビュートデータ（ＡＴＳ−ＡＴＲ）のフォーマットを詳しく示す説明図である。
【図７】図３のオーディオタイトルセットインフォメーション（ＡＴＳＩ）のフォーマットを詳しく示す説明図である。
【図８】図７のオーディオタイトルセットインフォメーション・マネージメントテーブル（ＡＴＳＩ−ＭＡＴ）のフォーマットを詳しく示す説明図である。
【図９】図８のオーディオタイトルセットメニュー・オーディオストリーム・アトリビュートデータ（ＡＴＳＭ−ＡＳＴ−ＡＴＲ）を詳しく示す説明図である。
【図１０】図８のオーディオタイトルセット・オーディオストリーム・アトリビュートテーブル（ＡＴＳ−ＡＳＴ−ＡＴＲＴ）のフォーマットを詳しく示す説明図である。
【図１１】図１０の各オーディオストリームのアトリビュートデータ（ＡＴＳ−ＡＳＴ−ＡＴＲ）を詳しく示す説明図である。
【図１２】図１のオーディオコンテンツブロックユニット（ＡＣＢＵ）を示す説明図である。
【図１３】図１２のオーディオパックとビデオパックのフォーマットを詳しく示す説明図である。
【図１４】図１２のオーディオコントロール（Ａ−ＣＯＮＴ）パックのフォーマットを詳しく示す説明図である。
【図１５】図１４のオーディオキャラクタディスプレイ（ＡＣＤ）エリアのフォーマットを詳しく示す説明図である。
【図１６】図１５のネームスペース情報により表示される例を示す説明図である。
【図１７】図１４のオーディオサーチデータ（ＡＳＤ）エリアのフォーマットを詳しく示す説明図である。
【図１８】図１のオーディオコンテンツブロックユニットの変形例を示す説明図である。
【図１９】第１の参考例に係るＤＶＤ−オーディオディスクの再生装置を示すブロック図である。
【図２０】図１９の再生装置を機能的に示すブロック図である。
【図２１】第２の参考例におけるオーディオマネージャインフォメーション（ＡＭＧＩ）のフォーマットを詳しく示す説明図である。
【図２２】図２１のＴＯＣ情報を詳しく示す説明図である。
【図２３】第２の参考例の変形例におけるオーディオタイトルセットインフォメーション（ＡＴＳＩ）のフォーマットを詳しく示す説明図である。
【図２４】第２の参考例のＤＶＤ−オーディオディスクの再生装置を示すブロック図である。
【図２５】図２４の再生装置を機能的に示すブロック図である。
【図２６】第３の参考例におけるＴＯＣ情報と再生装置を示すブロック図である。
【図２７】Ａ−Ｖ同期再生処理を説明するためのフローチャートである。
【図２８】Ａ−Ｖ同期再生処理を説明するためのフローチャートである。
【図２９】 実施例のＤＶＤ−オーディオディスクの基本フォーマットを示す説明図である。
【図３０】図２９のＤＶＤ−オーディオディスクのオーディオデータ構造を示す説明図である。
【図３１】ＤＶＤ−Ｖａｎディスクの基本フォーマットを示す説明図である。
【図３２】ＤＶＤビデオディスクの基本フォーマットを示す説明図である。
【図３３】ＤＶＤ−Ａｖｄディスクの基本フォーマットを示す説明図である。
【図３４】 実施例のＤＶＤ−オーディオディスクにおけるＡＯＴＴ−ＡＯＢ−ＡＴＲを示す説明図である。
【図３５】 実施例のＤＶＤ−オーディオディスクにおけるリニアＰＣＭのプライベートヘッダを示す説明図である。
【図３６】 実施例を適用した再生装置によるＡＴＳと静止画の再生処理を示すフローチャートである。
【図３７】 実施例を適用した再生装置によるオーディオデータのサンプリング周波数に応じたフレーム再生処理を示すフローチャートである。
【図３８】 実施例を適用した再生装置によるオーディオデータのエンファシス再生処理を示すフローチャートである。
【図３９】 実施例を適用した再生装置によるオーディオデータのエンファシス再生処理を示すフローチャートである。
【図４０】 実施例を適用したエンコード装置のブロック図である。
【図４１】図４０の信号処理回路を詳細に示すブロック図である。
【図４２】 本発明の他の実施形態におけるデータ構造を示す説明図である。
【図４３】図４２のオーディオ・オンリ・タイトル用オーディオ・オブジェクト・セット（ＡＯＴＴ−ＡＯＢＳ）を詳しく示す説明図である。
【図４４】図４３のオーディオパックの一例を詳しく示す説明図である。
【図４５】図４４のプライベートヘッダを詳しく示す説明図である。
【図４６】図４５のＵＰＣ／ＥＡＮ−ＩＳＲＣデータを詳しく示す説明図である。
【図４７】図４４のオーディオデータのビットシフトを示す説明図である。
【図４８】図４３のリアルタイム・インフォメーション（ＲＴＩ）パックを詳しく示す説明図である。
【図４９】図４３のスチルピクチャセット（ＳＰＳ）を詳しく示す説明図である。
【図５０】図４２のオーディオ・タイトルセット・インフォメーション・マネージメント・テーブル（ＡＴＳＩ−ＭＡＴ））を詳しく示す説明図である。
【図５１】図５０のオーディオ・オンリ・タイトル用オーディオ・オブジェクト・アトリビュート（ＡＯＴＴ−ＡＯＢ−ＡＴＲ）を詳しく示す説明図である。
【図５２】図５０のオーディオ・オンリ・タイトル用ビデオ・オブジェクト・オーディオストリーム・アトリビュート（ＡＯＴＴ−ＶＯＢ−ＡＳＴ−ＡＴＲ）を詳しく示す説明図である。
【図５３】図５１及び図５２のチャネル割り当て情報を詳しく示す説明図である。
【図５４】図５０のダウンミックス係数（ＡＴＳ−ＤＭ−ＣＯＥＦＴ）を詳しく示す説明図である。
【図５５】図５０のスチルピクチャ・データ・アトリビュート（ＡＴＳ−ＳＰＣＴ−ＡＴＲ）を詳しく示す説明図である。
【図５６】図４２のオーディオ・タイトルセット・プログラム・チェーン・インフォメーション・テーブル（ＡＴＳ−ＰＧＣＩＴ）を詳しく示す説明図である。
【図５７】図５６のＡＴＳ−ＰＧＣＩＴインフォメーション（ＡＴＳ−ＰＧＣＩＴＩ）を詳しく示す説明図である。
【図５８】図５６のＡＴＳ−ＰＧＣＩサーチポインタ（ＡＴＳ−ＰＧＣＩ−ＳＲＰ）を詳しく示す説明図である。
【図５９】図５８のＡＴＳ−ＰＧＣカテゴリ（ＡＴＳ−ＰＧＣＩ−ＣＡＴ）を詳しく示す説明図である。
【図６０】図５６のオーディオ・タイトルセット・プログラム・チェーン・インフォメーション（ＡＴＳ−ＰＧＣＩ）を詳しく示す説明図である。
【図６１】図６０のＡＴＳ−ＰＧＣジェネラル・インフォメーション（ＡＴＳ−ＰＧＣ−ＧＩ）を詳しく示す説明図である。
【図６２】図６１のＡＴＳ−ＰＧＣコンテンツ（ＡＴＳ−ＰＧＣ−ＣＮＴ）を詳しく示す説明図である。
【図６３】図６０のＡＴＳプログラム・インフォメーション・テーブル（ＡＴＳ−ＰＧＩＴ）を詳しく示す説明図である。
【図６４】図６３のＡＴＳプログラム・インフォメーション（ＡＴＳ−ＰＧＩ）を詳しく示す説明図である。
【図６５】図６４のＡＴＳ−ＰＧコンテンツ（ＡＴＳ−ＰＧ−ＣＮＴ）を詳しく示す説明図である。
【図６６】図６３のＡＴＳセル・プレイバック・インフォメーション・テーブル（ＡＴＳ−Ｃ−ＰＢＩＴ）を詳しく示す説明図である。
【図６７】図６６のＡＴＳセル・プレイバック・インフォメーション（ＡＴＳ−Ｃ−ＰＢＩ）を詳しく示す説明図である。
【図６８】図６７のＡＴＳ−Ｃタイプ（ＡＴＳ−Ｃ−ＴＹ）を詳しく示す説明図である。
【図６９】本発明に適用される実施形態のエンコード装置を示すブロック図である。
【図７０】図６９のエンコード装置の処理を示すフローチャートである。
【図７１】本発明に係る実施形態のデコード装置を示すブロック図である。
【図７２】図７１のデコード装置を機能的に示すブロック図である。
【図７３】図７１、図７２のデコード装置の処理を示すフローチャートである。
【図７４】本発明に係る実施形態のデコード装置を詳しく示すブロック図である。
【図７５】図７４のデコード装置のオーディオ信号と静止画データの再生処理を示すフローチャートである。
【図７６】図７４のデコード装置の静止画のページめくり処理を示すフローチャートである。
【図７７】図７４のオーディオデコーダの変形例を示すブロック図である。
【図７８】図７７のサンプルレート変換器の処理を示す説明図である。
【図７９】本発明に係る実施形態のデコード装置の著作権データ表示装置を詳しく示すブロック図である。
【図８０】図７９の装置の著作権データ表示処理を示すフローチャートである。
【図８１】 本発明の実施形態におけるオーディオ信号を伝送する場合のパッキング装置を示すブロック図である。
【図８２】図８１のパッキング装置のパッキング処理を示すフローチャートである。
【図８３】図８２のパック生成処理を詳しく示すフローチャートである。
【図８４】図８２のＡＴＳ生成処理を詳しく示すフローチャートである。
【図８５】図８１のパッキング装置の送信処理を示すフローチャートである。
【図８６】 本発明の実施形態におけるオーディオ信号を伝送する場合のアンパッキング装置を示すブロック図である。
【図８７】図８６のアンパッキング装置の受信処理を示すフローチャートである。
【図８８】図８６のアンパッキング装置のアンパッキング処理を示すフローチャートである。
【図８９】図８１のＡＴＳＩデコード処理を詳しく示すフローチャートである。
【図９０】図８８のパックデコード処理を詳しく示すフローチャートである。
【符号の説明】
ＶＭＧ ビデオマネージャ（第２の管理エリア）
ＶＴＳ＜１＞ ビデオタイトルセット
ＡＭＧ オーディオマネージャ（第１の管理エリア）
ＡＴＳ＜１＞，ＡＴＳ＜２＞ オーディオタイトルセット
Ａパック 第１のパック
ＡＯＢ オーディオオブジェクト
ＡＯＢＳ オーディオオブジェクトセット
ＡＴＳＩ オーディオタイトルセット・インフォメーション
ＡＴＳＩ−ＭＡＴ オーディオタイトルセット・インフォメーション・マネージメント・テーブル
ＲＴＩパック 第２のパック
ＳＰＣＴパック 第３のパック
１２１ オーディオバッファ（第１のバッファ）
１２８ デマルチプレクサ（パック振り分け手段）
１２９ オーディオデコーダ（第１のデコーダ）
１３２ システムコントローラ（サンプリング周波数判断手段）
１４３ サンプルレート変換器（レート変換手段）
１４４，１４５ Ｄ／Ａ変換器（Ｄ／Ａ変換手段）
１４７ 静止画バッファ（第３のバッファ）
１４８ ＲＴＩバッファ（第２のバッファ）
１４９ 静止画デコーダ（第３のデコーダ）
１５０ ＲＴＩデコーダ（第２のデコーダ）
２００ 画像変換部
２０１ 加算器（合成表示手段）
２０２ コード変換部[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to an audio disc andAudio signalThe present invention relates to a decoding device.
[0002]
[Prior art]
A CD (compact disc) is known as a conventional audio reproducing optical disc. A DVD (digital video disk) is known as an optical disk having a higher density than a CD.
[0003]
[Problems to be solved by the invention]
However, in a DVD (hereinafter referred to as DVD-video), a video signal is recorded as a main and an audio signal is recorded as a slave. Therefore, there are the following problems.
(1) The audio signal is integrated with the video signal, and the recording capacity of the audio signal is small.
(2) The time of the audio signal cannot be managed.
(3) Simple character information such as a song title cannot be extracted.
[0004]
Compared with video, audio users have a wider range of usage, so a simple playback method is required by providing a TOC (Table Of Contents) area like a CD. However, in DVD-Video, a video content block unit is composed of a navigation control pack (CONT pack), a plurality of video (V) packs and an audio (A) pack, and playback of the V and A packs is controlled by the CONT pack. Therefore, even if the audio signal is mainly recorded, it cannot be easily reproduced for the user, and there is a problem that the usability is poor.
[0005]
Also, in DVD-video, time management is performed only in units of video frames. Therefore, even if an attempt is mainly made to record an audio signal, continuity of the audio signal is more important than video, and real-time management is difficult. There is a problem.
[0006]
  Therefore, the present invention provides an audio disc on which data is recorded, which can be easily reproduced for the user when audio signals are mainly recorded, is easy to use, and management of real time can be simplified.Audio signalAn object of the present invention is to provide a decoding apparatus.
[0007]
[Means for Solving the Problems]
  In order to achieve the above object, the present invention comprises the following means 1) and 2). That is,
1) Auxiliary signal recording area and main signal recording area are continuously arranged in the main signal recording area.
  Analog audio signals are allocated to the front channel group and the rear channel group of the multi-channel, respectively, so that the front channel group and the rear channel group are assigned.EveryQuantized at different bit numbers and sampling frequencies, and with a common bit shift amount for the channels of the rear channel group.In the up directionBit shiftAnd the word length is reduced by the bit shift amount.An audio package recorded as each digital audio signal, which is stored in a private header provided in the audio package.An identifier indicating whether to allow or prohibit down-mixing of the multi-channel to a stereo 2-channelRecorded opacity,
  Audio packAn audio area consisting of
  In the audio areaManagement informationareaBecauseAudio areaThe number of quantization bits and the sampling frequency for each channel of the front channel group and the rear channel group of the digital audio signal recorded in the channel, and a common bit shift amount for the channels of the rear channel group, Channel allocation information for identifying the channels of the allocated forward channel group and the backward channel group, respectively.WhenManagement information recordedarea(ATSI)When,
  An audio disc recorded with a predetermined format.
2)1)A decoding device for decoding an audio signal recorded on the described audio disk,
  in frontManagement informationareaThe number of quantization bits and the sampling frequency for each channel of the front channel group and the rear channel group of the digital audio signal recorded inAnd beforeOn the basis of the common bit shift amount for the channels of the rear channel group and the channel allocation information for identifying the channel of the assigned front channel group and the channel of the rear channel group, respectively. Means for decoding the digital audio signals of the channels of the front channel group and the rear channel group recorded in
  An audio signal decoding device.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
1 is an explanatory diagram of a DVD-video format and a DVD-audio format as a reference example, FIG. 2 is an explanatory diagram showing in detail the format of the audio manager (AMG) of FIG. 1, and FIG. 3 is an audio title of FIG. 4 is an explanatory diagram showing in detail the format of the set (ATS), FIG. 4 is an explanatory diagram showing in detail the format of the audio manager information (AMGI) in FIG. 2, and FIG. 5 is an audio title set attribute table (ATS-ATRT) in FIG. 6 is an explanatory diagram showing the format in detail, FIG. 6 is an explanatory diagram showing in detail the format of the audio title set attribute data (ATS-ATR) in FIG. 5, and FIG. 7 is a detailed diagram of the audio title set information (ATSI) in FIG. Explanation 8 is an explanatory diagram showing in detail the format of the audio title set information management table (ATSI-MAT) of FIG. 7, and FIG. 9 shows the audio title set menu, audio stream attribute data (ATSM-AST-ATR) of FIG. FIG. 10 is an explanatory diagram showing in detail the format of the audio title set / audio stream / attribute table (ATS-AST-ATRT) in FIG. 8, and FIG. 11 is an attribute data (ATS-) of each audio stream in FIG. It is explanatory drawing which shows AST-ATR) in detail.
[0009]
12 is an explanatory diagram showing the audio content block unit (ACBU) in FIG. 1, FIG. 13 is an explanatory diagram showing in detail the format of the audio pack and video pack in FIG. 12, and FIG. 14 is an audio control (A-) in FIG. FIG. 15 is an explanatory diagram showing in detail the format of the audio character display (ACD) area of FIG. 14, and FIG. 16 is an explanatory diagram showing an example displayed by the name space information of FIG. 17 is an explanatory diagram showing in detail the format of the audio search data (ASD) area of FIG. 14, and FIG. 18 is an explanatory diagram showing a modification of the audio content block unit of FIG.
[0010]
19 is a block diagram showing a DVD-audio disc playback device as a reference example, FIG. 20 is a block diagram functionally showing the playback device of FIG. 19, and FIG. 21 is an audio manager information (second reference example). (AMGI) format in detail, FIG. 22 is a diagram illustrating in detail the TOC information in FIG. 21, FIG. 23 is a diagram illustrating in detail the format of audio title set information (ATSI) in the second reference example, FIG. FIG. 25 is a block diagram functionally showing the playback device of FIG. 24, and FIG. 26 is a block diagram showing the TOC information and playback device of the third reference example. FIG. 27 and FIG. 28 are flowcharts for explaining AV synchronized playback processing. That.
[0011]
Here, in the DVD-audio disc of this description, two channels for stereo and 5/6/8 channels are used as audio signals so as to correspond to a transition period when the CD generation is shifted to the DVD-audio generation. Both signals are recorded. Further, it is considered that only the 5/6/8 channel multi-channel signal is recorded when this transition period has passed.
[0012]
FIGS. 1A and 1B show DVD-video and DVD-audio formats, respectively, and the DVD-audio format is compatible with DVD-video although the area names are different. First of all, the DVD-video format is composed of the head video manager (VMG) and the following areas of a plurality of video title sets (VTS), while the DVD-audio format corresponds to this. 2 includes an audio manager (AMG) shown in detail in FIG. 2 and a plurality of audio title sets (ATS) following AMG as shown in detail in FIG.
[0013]
Each VTS is composed of a leading VTS information (VTSI), followed by one or more video content block sets (VCBS) and a last VTSI, while each ATS corresponds to the leading ATS information (ATSI). ) Followed by one or more audio content block sets (ACBS) and the last ATSI. The performance time of each song in ACBS is set in ATSI in real time.
In the present invention, menu information for displaying a menu screen is recorded in the first ACBS. This is the same as DVD video and will not be described.
[0014]
Each VCBS is composed of a plurality of VCBs, while each ACBS is composed of a plurality of ACBs. Each VCB corresponds to one video title, and each ACB corresponds to one audio title. Each VCB (one title) is composed of a plurality of chapters (Chapter), while each ACB (one title) is composed of a plurality of tracks (Track) corresponding thereto. The chapter includes a part of title (PTT), and the track includes a part of title (PTT).
[0015]
Each chapter is composed of a plurality of cells (CELL), while each track is composed of a plurality of indexes (Index). Each cell is composed of a plurality of VCB units (VCBU), while each index is composed of a plurality of ACB units (ACBU) corresponding thereto. Each of the VCB unit and the ACB unit is composed of a plurality of packs, and one pack is composed of 2048 bytes.
[0016]
Each VCB unit is composed of a leading control pack (hereinafter referred to as a CONT pack), followed by a plurality of audio (A) packs, video (V) packs, and sub-picture (SP) packs. Each of them is composed of a leading audio control pack (hereinafter referred to as A-CONT pack), followed by a plurality of A packs and V packs.
[0017]
Information for controlling the subsequent V pack is arranged in the CONT pack, and information for managing the audio signal of the subsequent A pack is arranged in the A-CONT pack like the TOC information of the CD. Audio data is arranged in the A pack, and closed caption (CC) data other than the audio data is arranged in the V pack, in addition to the video data.
[0018]
As shown in Fig. 2, AMG (Audio Manager)
・ Audio Manager Information (AMGI) shown in detail in FIG.
-Audio content block set (AMGM-ACBS) for AMG menu,
・ AMGI for backup
Have AMGM-ACBS is used as control information
・ Presentation control information (PCI)
・ Data search information (DSI)
Have
[0019]
The ATS (Audio Title Set) is shown in FIG.
・ Audio title set information (ATSI) shown in detail in FIG.
An audio content block set (ATSM-ACBS) for the ATS menu;
-Audio content block set (ATSA-ACBS) for ATS title,
・ ATSI for backup
Have Both the ATSM-ACBS and ATSA-ACBS have the PCI and DSI described above (FIG. 2).
[0020]
AMGI (Audio Manager Information) is shown in detail in FIG.
・ AMGI management table (AMGI-MAT),
-Title search pointer table (T-SRPT);
Audio manager menu PGCI unit table (AMGM-PGCI-UT),
・ Parental management information table (PTL-MAIT),
-Audio title set attribute table (ATS-ATRT) in detail in FIG.
Text data manager (TXTDT-MG),
An audio manager menu cell (index) address table (AMGM-C-ADT);
・ Audio manager menu ・ Audio content block unit ・ Addressless map (AMGM-ACBU-ADMAP)
Have
[0021]
ATS-ATRT (Audio Title Set / Attribute Table) is shown in detail in FIG.
Audio title set attribute table information (ATS-ATRTI),
An audio title set attribute search pointer (ATS-ATR-SRP # 1 to #n) of each of a plurality (n) of ATSs;
Audio title set attribute data (ATS-ATR- # 1 to #n) of each of a plurality (n) ATSs as shown in detail in FIG.
Have
[0022]
Each of the audio title set attribute data (ATS-ATR- # 1 to #n) is shown in detail in FIG.
ATS-ATR-EA (end address),
ATS-CAT (category),
・ ATS-ATRI (Information)
Have
[0023]
As shown in FIG. 7 in detail, ATSI (ATS information) shown in FIG.
・ Audio title set information management table (ATSI-MAT) shown in detail in FIG.
Audio title set Part of title Search pointer table (ATS-PTT-SRPT)
・ Audio title set ・ Program chain information table (ATS-PGCIT),
・ Audio title set menu ・ PGCI ・ Unit table (ATSM-PGCI-UT),
・ Audio title set ・ Time map table (ATS-TMAPT)
・ Audio title set menu ・ Cell address table (ATSM-C-ADT)
・ Audio title set menu ・ Audio content block unit
・ Address map (ATSM-ACBU-ADMAP),
・ Audio title set ・ Cell address table (ATS-C-ADT)
Audio title set Audio content block unit Address map (ATS-ACBU-ADMAP)
Have
[0024]
The ATSI-MAT (Audio Title Set Information Management Table) shown in FIG.
ATS-ID (identifier)
ATS-EA (end address),
・ ATSI-EA,
・ VERN (DVD audio spec version number),
ATS-CAT (category),
・ ATSI-MAT-EA,
・ ATSM-ACBS-SA (start address),
・ ATSA-ACBS-SA,
ATS-PTT-SRPT-SA,
ATS-PGCIT-SA,
・ ATSM-PGCI-UT-SA,
ATS-TMAP-SA,
・ ATSM-C-ADT-SA,
ATSM-ACBU-ADMAP-SA,
ATSM-AST-ATR (ATSM audio stream attributes) as shown in detail in FIG. 9,
ATS-AST-Ns (number of ATS audio streams);
ATS-AST-ATRT (ATS audio stream attribute table) as shown in detail in FIG.
Have
[0025]
The ATSM-AST-ATR is composed of 8 bytes (bits b63 to b0) as shown in detail in FIG. 9, and the following data (1) to (4) are used as attributes of the encoded audio signal recorded on the disc. ) Is placed (other bits are reserved).
(1) Audio encoding mode (3 bits b63 to b61)
000b: Dolby AC-3
010b: MPEG-1 or MPEG-2 (no extension bitstream)
011b: MPEG-2 (with extended bitstream)
100b: Linear PCM audio
101b: Linear PCM audio (including 2ch + 5ch, 2ch + 6ch, 2ch + 8ch)
[0026]
(2) Quantization / DRC (dynamic range control) information (2 bits b55, b54)
"11b" when the audio encoding mode is "000b"
When the audio encoding mode is “010b” or “011b”
00b: No dynamic range control data exists in the MPEG audio stream
01b: Dynamic range control data exists in the MPEG audio stream
10b, 11b: Hold
-When the audio encoding mode is "100b" or "101b", for stereo 2ch
00b: 16 bits
01b: 20 bits
10b: 24 bits
11b: Hold
[0027]
(3) Sampling frequency fs (2 bits b53, b52)
For stereo 2ch
00b: 48 kHz
01b: 96 kHz
10b: 192 kHz
(4) Number of audio channels (3 bits b50 to b48)
000b: 1ch (monaural)
001b: 2ch (stereo)
010b: 3ch
011b: 4ch
100b: (stereo 2ch + 5ch)
101b: (stereo 2ch + 6ch)
110b: 7ch
111b: (stereo 2ch + 8ch)
[0028]
As shown in detail in FIG. 11, the ATS-AST-ATRT (ATS audio stream attribute table) shown in FIG. 10 has ATS-AST-ATR for each of audio streams # 0 to # 7, and ATS-AST-ATR. Each is composed of 8 bytes (64 bytes in total).
[0029]
As shown in FIG. 11, the ATS-AST-ATR of one audio stream is 8 bytes (bits b63 to b0) similar to the audio title set menu audio stream attribute data (ATSM-AST-ATR) shown in FIG. In addition to the attribute data (1) to (4),
(5) Multi-channel extension (1 bit b60),
(6) Audio type (2 bits b59, b58);
(7) Audio application mode (2 bits b57, b56);
(8) Thinning information (2 bits b47 and b46) of the stream (AST),
(9) Thinning information only for LFE (Low Frequency Effect) 1ch (2 bits b45, b44)
Each data. And (7) audio application mode of this DVD audio disc is
11b: 2ch + surround mode
And (8) the stream thinning information and (9) the thinning information only for LFE1ch are both as band information.
00b: Full (1/1)
01b: Half (1/2)
10b: Quarter (1/4)
Is recorded.
[0030]
However, (4) the number of audio channels in this ATSM-AST-ATR is always 2ch in the audio stream # 0, and the audio stream # 1 includes the front 3ch. That is, for example, when an audio signal of one title is recorded in 2 + 6ch, a 2ch stereo signal is assigned to the audio stream # 0, and among the 6ch, a 3ch front signal is assigned to the audio stream # 1, a 2ch rear signal and the LFE1ch. Assign the signal to audio stream # 2. The audio manager information management table (AMGI-MAT) shown in FIG. 4 and the audio title set information management table (ATSI-MAT) shown in FIG. Is recorded.
[0031]
Also, when the 2 + 6ch analog audio signal is sampled at the following sampling frequency fs and quantized with the following number of quantization bits, for example,
Stereo 2ch: 48kHz, 20 bits
Front 3ch: 96kHz, 16bit
Rear 2ch, LFE1ch: 48kHz, 16 bits (no thinning)
The audio title set menu, audio stream, and attribute data (ATSM-AST-ATR) shown in FIG.
(1) Audio encoding mode
101b: Linear PCM audio (including 2ch + 5ch, 2ch + 6ch, 2ch + 8ch)
(2) Quantization / DRC
01b: 20 bits
(3) Sampling frequency fs
00b: 48 kHz
(4) Number of audio channels
101b: (stereo 2ch + 6ch)
Is recorded.
[0032]
Also, the ATS-AST-ATR of audio stream # 0
(1) Audio encoding mode
101b: Linear PCM audio (including 2ch + 5ch, 2ch + 6ch, 2ch + 8ch)
(2) Quantization / DRC
01b: 20 bits
(3) Sampling frequency fs
00b: 48 kHz
(4) Number of audio channels
001b: 2ch (stereo)
(7) Audio application mode
11b: 2ch + surround mode
(8) Thinning information of the stream
00b: Full (1/1)
(9) Thinning information only for LFE1ch
00b: Full (1/1)
Is recorded.
[0033]
Also, the ATS-AST-ATR of audio stream # 1
(1) Audio encoding mode
101b: Linear PCM audio (including 2ch + 5ch, 2ch + 6ch, 2ch + 8ch)
(2) Quantization / DRC
00b: 16 bits
(3) Sampling frequency fs
01b: 96 kHz
(4) Number of audio channels
010b: 3ch
(7) Audio application mode
11b: 2ch + surround mode
(8) Thinning information of the stream
00b: Full (1/1)
(9) Thinning information only for LFE1ch
00b: Full (1/1)
Is recorded.
[0034]
Also, the ATS-AST-ATR of audio stream # 2
(1) Audio encoding mode
101b: Linear PCM audio (including 2ch + 5ch, 2ch + 6ch, 2ch + 8ch)
(2) Quantization / DRC
00b: 16 bits
(3) Sampling frequency fs
00b: 48 kHz
(4) Number of audio channels
010b: 3ch
(7) Audio application mode
11b: 2ch + surround mode
(8) Thinning information of the stream
00b: Full (1/1)
(9) Thinning information only for LFE1ch
00b: Full (1/1)
Is recorded.
[0035]
Next, the A pack in which the audio stream is recorded and the control pack will be described. As shown in FIG. 12, the VCB unit is composed of an arbitrary number of packs for 0.4 to 1.0 seconds, and the ACB unit is composed of an arbitrary number of packs for 0.5 to 1.0 seconds. Yes. The A-CONT pack in the DVD-audio ACB unit is arranged in the third pack in the DVD-video VCB unit.
[0036]
The A-CONT pack is basically arranged in units of 0.5 second of the audio time, and is arranged so as to be completed in the range of 0.5 to 1.0 seconds at the index break. The audio time (GOF: Group of Audio Frame unit) is indicated by an A-CONT pack, and the data position is determined by the number of audio frame numbers, first access unit pointers, and frame headers. Also, the A pack immediately before the A-CONT pack does not force padding in units of 0.5 second of the audio time.
[0037]
Adjacent A packs are arranged so that audio signals are related to each other. For example, in the case of stereo, an L channel pack and an R channel pack are arranged adjacent to each other, and a 5/6/8 channel multi-channel is arranged. In the same way, they are arranged adjacent to each other. The V pack is arranged adjacent to the A pack when video is displayed during reproduction of the audio signal. As shown in FIG. 13, the A pack and the V pack are a 4-byte pack start information and a 6-byte SCR (System Clock Reference) for 2034 bytes of user data (A data and V data). ) Information, a 3-byte Mux rate information, and a 1-byte stuffing total 14-byte pack header (1 pack = total 2048 bytes). In this case, the time of the A pack in the same title can be managed by setting the SCR information as a time stamp as “1” in the first pack in the ACB unit and continuing in the same title.
[0038]
On the other hand, as shown in FIG. 14, the A-CONT pack has a 14-byte pack header, a 24-byte system header, a 1003-byte ACD (audio character display) packet, and a 1007-byte ASD (audio search data). ) Consists of packets. The ACD packet includes a 6-byte packet header, a 1-byte substream ID, 636-byte ACD (audio character display) information as shown in detail in FIG. 15, and a 360-byte reserved area. The ASD packet is similarly composed of a 6-byte packet header, a 1-byte substream ID, and a 1000-byte ASD (audio search data) as shown in detail in FIG.
[0039]
As shown in detail in FIG. 15, the 636-byte ACD information area has a 48-byte general information area and a 294-byte area for each of the first language character “1” and the second language character “2”. Each area is composed of a 93-byte name space area, two 93-byte free space areas, and a 15-byte data pointer area. In one name space area of the first language character “1” and the second language character “2”, for example, data for displaying the music title in Japanese is arranged as shown in FIG. In the namespace area, data for displaying in English is arranged. The display language may be determined by the disc publisher.
[0040]
The 48-byte general information includes, for example, 16-byte service level information, 12-byte language code information, 6-byte character set code information, 6-byte display item information, and 2-byte “previous ACD information”. Difference information and 6-byte hold information. The 16-byte service level information indicates the display size, display type, audio / video / SP distinction, stream, etc., and the character is mandatory (required) and the bitmap is optional (optional). The 12-byte language code information indicates the language of the characters “1” and “2” by 2 bytes, as in the video file, and indicates a maximum of 8 languages in one file. English is mandatory.
[0041]
The 6-byte character set code information can have a maximum of 15 character codes corresponding to language codes, and indicates the presence / absence and type of characters “1” and “2” in 1 byte. A code example is shown below.
1. ISO646
2. ISO8859-1
3. MS-JIS
The 6-byte display item information indicates the free space “1” and “2” shown in FIG. The name space is mandatory, and the title name, music name, and artist name must be written.
[0042]
As shown in detail in FIG. 17, 1000-byte ASD (audio search data) includes 16-byte general information, 8-byte current number (No.) information, 16-byte current time information, and 8-byte title. It consists of set search information, 8-byte title search information, 404-byte track search information, 408-byte index search information, 80-byte highlight search information, and a 52-byte reserved area.
[0043]
The current number information of 8 bytes includes the current title number of the title set (2 bytes: BCD), the current track number of the title set (2 bytes: BCD), and the current index number of the track (2 bytes: BCD). ) And a reserved area (2 bytes). The current time information of 16 bytes includes the track playback time (4 bytes: BCD), the remaining playback time of the track (4 bytes: BCD), the absolute time of the title (4 bytes: BCD), and the remaining title. The absolute time (4 bytes: BCD).
[0044]
The 8-byte title set search information is composed of the first sector number (4 bytes) of the title set and the last sector number (4 bytes) of the title set. The 8-byte title search information is composed of the first sector number (4 bytes) of the title and the last sector number (4 bytes) of the title. The 404-byte track search information includes a title track and sector number (4 bytes × 99), a title first track number (4 bytes), and a title last track number (4 bytes).
[0045]
The 408-byte index search information includes a track index and sector number (4 bytes × 100), a track first index number (4 bytes), and a track last index number (4 bytes). The 80-byte highlight search information includes a track in-sector number (4 bytes × 10) and a track out-sector number (4 bytes × 10).
[0046]
According to such a format, since the A-CONT pack for managing the audio signal of the subsequent A pack such as the TOC information of the CD is arranged at the head of the plurality of A packs, the audio data is the video data. The recording capacity can be increased. Also, the audio time can be managed by the A-CONT pack, and simple character information such as a song name related to the audio data can be extracted by the A-CONT pack.
[0047]
Further, since TOC information such as title, start address, performance time, etc. is arranged in the A-CONT pack, information corresponding to the user's operation is taken out from the A-CONT pack and playback is started even during audio playback. be able to. Further, by arranging the TOC information in the audio manager information (AMGI) and the audio title set information (ATSI), the necessary TOC information is stored in the memory in the playback device, and information corresponding to the user's operation is stored in the memory. Can be read immediately and playback can be started. Further, since it is not necessary to store a large amount of information such as program chain information (PGCI) in DVD-video, the disk can be managed efficiently.
[0048]
further,
1. If there is no image (V) data in the content,
(1) Search and random access to three levels of title, song, and index are possible.
(2) Finding of GOF (audio frame) units, time search, and random access are possible.
(3) The title, song, and index times can be managed in real time.
[0049]
Also,
2. If there is image (V) data in the content,
For audio data,
In addition to the above (1) to (3)
(4) The title, the current time in the song, and the remaining time can be displayed and managed in real time.
[0050]
For video data,
(1) Search and random access to the three layers of title, PTT, and cell are possible.
(2) Cueing in units of video frames, time search, and random access are possible.
(3) The title, PTT, and cell time can be managed in real time.
(4) Current time and remaining time in PTT or title can be displayed and managed in video frame unit time.
[0051]
The ACBU in FIG. 1B includes the A-CONT pack and the CONT pack, but may be configured not to include the V pack and the CONT pack as shown in FIG. In this case, the video signal is not recorded, but the recording capacity of the audio signal is increased, the disc size can be reduced, and the playback function can be simplified, so that playback for portable use is possible. What is suitable for the device can be provided.
[0052]
Next, a playback apparatus according to a reference example will be described with reference to FIG. On the DVD audio disk 1, data having the above structure is EFM modulated and recorded in the form of pits. When a song selection, playback, fast forward, or stop operation is performed by the operation unit 18 or the remote control device 19, the control unit 23 controls the drive device 2 and the playback device 17 according to the operation, and is recorded on the DVD audio disk 1 during playback. After the read pit data is read by the drive device 2, it is EFM demodulated.
[0053]
In the playback device 17, this signal is sent to the CONT pack detection unit 3 and the A-CONT pack detection unit 9. The CONT pack detection unit 3 detects the CONT pack in the reproduction data, sets the control parameter in the parameter unit 8, and sequentially writes the V pack controlled by the CONT pack in the V pack buffer 4. User data (video signal, sub-picture information) in the V pack written in the V pack buffer 4 is stored in the order of packing based on the SCR (see FIG. 13) in the V pack by the buffer extracting unit 5 and in the CONT pack. Are output in order of output time based on the PTS (Presentation Time Stamp), and then output as an analog video signal via the image conversion unit 6, the D / A conversion unit 7, and the video output terminals 15 and 15 '.
[0054]
Further, the A-CONT pack detection unit 9 detects the A-CONT pack in the reproduction data, sets the control parameter in the parameter unit 14, and sequentially stores the A pack controlled by the A-CONT pack in the A pack buffer 10. Write. The user data (audio signal) in the A pack written in the A pack buffer 10 is in the order of the pack based on the SCR by the buffer extracting unit 11 and the current time of the audio search data ASD in the A-CONT pack (FIG. 17). Are output in order of output time, and then output as an analog audio signal via the PCM converter 12, D / A converter 13, and audio output terminal 16. Further, the display data (audio character display information ACD shown in FIGS. 15 and 16) in the A-CONT pack is sent to the display signal generation unit 20 to generate a display signal. This display signal is displayed on the display signal output terminal 22. Or is output to the built-in character display unit 21.
[0055]
FIG. 20 is a block diagram functionally showing the configuration shown in FIG. The reproduction means 2 corresponds to the drive device 2 shown in FIG. 19, and the reproduction signal processing separation means A (9, 10, 11, 14) is an A-CONT pack detection unit 9, an A pack buffer 10, a buffer extraction unit 11, and parameters. The audio signal output means (12, 13) corresponds to the PCM converter 12 and the D / A converter 13 and the character information output means 20 corresponds to the display signal generator 20. The reproduction signal processing separation means V (3, 4, 5, 8) corresponds to the CONT pack detection unit 3, the V pack buffer 4, the buffer extraction unit 5, and the parameter unit 8, and outputs video signal output means and sub-picture information. Means (6, 7) correspond to the image conversion unit 6 and the D / A conversion unit 7. The control means 23 corresponds to the control unit 23.
[0056]
In FIG. 20, when a command signal for reproducing the target music is sent from the operation unit 18 or the remote control device 19, the control means 23 sends an address control information signal corresponding to the reproduction command to the reproduction means 2. Thus, the target music is reproduced from the DVD audio disk 1. The reproduction signal processing separation means A separates the reproduction data, sends A-CONT information to the control means 23, sends audio signals to the audio signal output means (12, 13), and sends character information to the character information output means 20. The reproduction signal processing separation means V separates the reproduction data, sends CONT information to the control means 23, and sends the video signal and sub-picture information to the video signal means and sub-picture information output means (6, 7), respectively.
[0057]
Next, a playback apparatus of a second reference example using TOC (Table Of Contents) information will be described. As shown in FIG. 21, a TOC as shown in detail in FIG. 22 is added and recorded in an empty area of AMGI (Audio Manager Information), and the playback device accesses this TOC information to find the beginning of the song. Do. FIG. 22 shows general TOC information recorded in the lead-in area of a CD as an example, and the same information is recorded three times. In addition, when recording on the DVD audio disk 1 of the present invention, it may be repeated in this way, or may not be repeated.
[0058]
Here, in the TOC information used in the CD, when the point = 00 to 99, the absolute time when each movement indicated by the number starts is expressed in minutes (PMIN), seconds (PSEC), and frames (PFRAME). The When point = A0, PMIN indicates the first movement and PSEC = PFRAME = 0. When point = A1, PMIN indicates the last movement and PSEC = PFRAME = 0. When point = A2, the absolute time when the lead-out area starts is expressed in minutes (PMIN), seconds (PSEC), and frames (PFRAME). Accordingly, the TOC information shown in FIG. 22 indicates that six songs (or six movements) are recorded on the DVD audio disk 1 (points = 01 to 06). The TOC information may be recorded in an empty area of ATSI (Audio Title Set Information) as shown in FIG. 23 instead of AMGI, or in the ACD packet of the A-CONT pack shown in FIG. May be recorded in the reserved area (360 bytes).
[0059]
The TOC information is read at the start of reproduction and stored in the TOC information storage memory 14A shown in FIGS. 24 and 25. When the beginning of music or movement is designated, the TOC information storage memory 14A is referred to. To access the DVD audio disk 1. This TOC information is also recorded on the AMGI, ATSI or A-CONT pack, and further added to the lead-in area (TOC area 1a in the figure) at the innermost periphery of the DVD audio disk 1 as shown in FIG. At the start of reproduction, the TOC detection unit 24 may access the TOC area 1a independently and store it in the TOC information storage memory 14A. Note that this TOC information conforms to the configuration of FIG. 22, but simple reproduction information such as a downmix coefficient is added, and may be referred to as SAPP (Simple Audio Play Pointer) to distinguish it.
[0060]
Next, an AV synchronized playback process using TOC information will be described with reference to FIGS. In FIG. 27, when cued playback of a song or movement is designated, TOC information corresponding to the designated position is referred to (step S1), and then the location of the cell and index is calculated based on the TOC information (step S2). ). Next, the location is searched (step S3), and if confirmed, synchronized playback of A and V as shown in detail in FIG. 28 is performed (step S4 → S5).
[0061]
In FIG. 28, the CONT pack is reproduced (step S11), then the A-CONT pack is reproduced (step S12), and then it is checked whether the time information in the CONT pack and the A-CONT pack is the same time (step S12). S13). If it is not the same time, both the CONT pack and the A-CONT pack are adjusted by ± 1 pack (step S14), and then the process returns to step S11 to reproduce the CONT pack and the A-CONT pack. In step S14, one of the CONT pack and the A-CONT pack may be adjusted by ± 1 pack and the pack may be reproduced.
[0062]
When the time information in the CONT pack and the A-CONT pack is the same in step S13, the A pack controlled by the A-CONT pack is reproduced and the A pack address (SCR information) is incremented by one (step S15). Then, the V pack controlled by the CONT pack is reproduced and the V pack address (SCR information) is incremented by one (step S16). Next, it is checked whether or not the reproduction of the A pack has been completed (step S17). If it has not been completed, the process proceeds to step S18. If it has been completed, the process proceeds to step S20.
[0063]
In step S18, it is checked whether or not the reproduction of the V pack has been completed. If it has not been completed, the process returns to step S13. If it has been completed, the process proceeds to step S19. In step S19, the next V pack controlled by the CONT pack is reproduced, the V pack address is incremented by 1, and the process returns to step S13. In step S20, the next A pack controlled by the A-CONT pack is reproduced and the A pack address is incremented by one, and then it is checked whether or not the reproduction of the V pack is completed (step S21). If not, the process proceeds to step S22. If completed, the process proceeds to step S23.
[0064]
In step S22, it is checked whether or not the A pack controlled by the A-CONT pack is the final pack. If it is not the final pack, the process returns to step S16. On the other hand, if it is the final pack, the process returns to step S12. Play the A-CONT pack. In step S23, the next V pack controlled by the CONT pack is reproduced and the V pack address is incremented by one, and then it is checked whether or not the end of frame (EOF) is reached (step S24). Returning to step S13, on the other hand, in the case of EOF, this AV synchronized playback process is terminated. As described above, the audio data A and the video data V stored in the pack are reproduced in synchronism without interruption based on the time management information in the CONT pack and the A-CONT.
[0065]
  next,ImplementationAn example will be described. FIG. 29 shows an actual DVD audio disk according to the present invention.OutExampleInThe format is shown and does not include the VTS as shown in FIG. 31 to FIG. 33, and is composed only of ATS. This ATS is composed of an audio manager (AMG) shown in FIG. 1B, an audio manager menu (AMGM) for video and audio, and ATS <1> and ATS <2> managed by AMGI in the AMG. Further, as shown in FIG. 30, ATS <1> and ATS <2> do not include the A-CONT pack, and are composed of an A pack and a still image pack. Further, this still image pack is not arranged much as compared with the A pack, and about one pack is arranged per track.
[0066]
Here, for reference, FIG. 31 shows the format of a DVD-Van (video + audio navigation) disc. This format is schematically a video title set (VTS) and audio navigation (navigation) as DVD-video data. The data is composed of ANV title set (ANV-TS). More specifically, the VTS has the same configuration as that of the DVD video disk shown in FIG. 1A and FIG. 32 described later. On the other hand, the ANV-TS has an audio manager (AMG) shown in FIG. And ATS <1> and ATS <2> managed by the AMGI in the AMG in pairs with the VTS <1> and VTS <2>.
Further, as shown in FIGS. 32 and 1A, the format of the DVD video disk does not include ATS and ANV-TS, and is configured only by VTS.
[0067]
FIG. 33 shows the format of a DVD-Avd (audio + AV data) disc. This format is roughly based on a video title set (VTS) as DVD-video data and an audio title set (ATS) as DVD-audio data. It is configured. More specifically, the VTS includes a video manager (VMG) shown in FIG. 1A, a video and audio video manager menu (VMGM), and a VTS <1> managed by the VMGI in the VMG. .
On the other hand, the ATS is paired with the audio manager (AMG) shown in FIG. 1 (b), the audio manager menu (AMGM) of video and audio, and the audio data in VTS <1> on the VTS side, and in the AMG. The ATS <1> managed by the AMGI and the ATS <2> managed by the AMGI in the AMG are not paired with the VTS side. Further, as shown in FIG. 30, the ATS <2> does not include an A-CONT pack, and includes an A pack and a still image pack.
[0068]
  FIG.ImplementationAn audio-only title audio object attribute (AOTT-AOB-ATR) recorded on the disc as attribute data indicating the contents of audio data of the example disc is shown. This attribute data is composed of 8 bytes (64 bits b63 to b0) and will be described in detail from the MSB side.
A 4-bit (b63-b60) audio encoding mode;
-1 bit (b59) downmix (D-M) mode;
A 3-bit (b58-b56) multi-channel structure;
4 bit (b55 to b52) channel group 1 quantization bit number Q1,
4 bit (b51 to b48) channel group 2 quantization bit number Q2,
A sampling frequency fs1 of channel group 1 of 4 bits (b47 to b44);
A sampling frequency fs2 of channel group 2 of 4 bits (b43 to b40);
A 3-bit (b39 to b37) reserved area;
-5-bit (b36-b32) channel assignments;
-It is composed of a reserved area of the remaining 32 bits (b31 to b0). The remaining 32 bits (b31 to b0) are used for attribute data of each channel.
[0069]
The above data will be described in more detail below.
(1) Audio encoding mode (b63 to b60)
0000b: Linear PCM mode
0001b: reserved for compressed audio (Dolby Digital)
0010b: reserved for compressed audio (no MPEG2 extension)
0011b: reserved for compressed audio (with MPEG2 extension)
0100b: reserved for compressed audio (DTS)
0101b: reserved for compressed audio (SDDS)
Other: Reserved for other encoding modes
(2) Downmix mode (b59)
0b: Downmix stereo output permission
1b: Downmix stereo output prohibited
(3) Type of multi-channel structure (b58 to b56)
000b: Type 1
Other: Hold
[0070]
(4) Quantization bit number Q of channel group 1 (b55 to b52)
0000b: 16 bits
0001b: 20 bits
0010b: 24 bits
Other: Hold
(5) Quantization bit number Q of channel group 2 (b51 to b48)
“0000b” when the number of quantization bits Q of channel group 1 is “0000b”
“0000b” or “0001b” when the number of quantization bits Q of channel group 1 is “0001b”
When the quantization bit number Q of the channel group 1 is “0010b”, “0000b”, “0001b” or “0010b”
However, 0000b: 16 bits
0001b: 20 bits
0010b: 24 bits
Other: Hold
[0071]
(6) Sampling frequency fs1 of channel group 1 (b47 to b44)
0000b: 48 kHz
0001b: 96 kHz
0010b: 192 kHz
1000b: 44.1 kHz
1001b: 88.2 kHz
1010b: 176.4 kHz
Other: Hold
[0072]
(7) Sampling frequency fs2 (b43 to b40) of channel group 2
“0000b” when the sampling frequency fs1 of channel group 1 is “0000b”
When the sampling frequency fs1 of the channel group 1 is “0001b”, “0000b” or “0001b”
When the sampling frequency fs1 of the channel group 1 is “0010b”, “0000b”, “0001b” or “0010b”
“1000b” when the sampling frequency fs1 of channel group 1 is “1000b”
When the sampling frequency fs1 of the channel group 1 is “1001b”, “1000b” or “1001b”
When the sampling frequency fs1 of the channel group 1 is “1010b”, “1000b”, “1001b”, or “1010b”
[0073]
  thisImplementationIn the example disk, linear PCM mode is used. The linear PCM private header is as shown in FIG.
An 8-bit substream ID;
A 4-bit reserved area;
A 4-bit ISRC number and
・ 8-bit ISRC data,
-8-bit private header length,
A 16-bit first access unit pointer;
1-bit audio emphasis flag F1,
It is composed of a 1-bit audio emphasis flag F2, etc.
[0074]
The audio emphasis flag F1 describes “emphasis off” (= 0b) when the sampling frequency fs is 96 kHz or 88.2 kHz, and “emphasis on” (= 1b) in other cases. Is described. The audio emphasis flag F2 describes “emphasis off” (= 0b) when the sampling frequency fs is 192 kHz or 176.4 kHz, and “emphasis on” (= 1b) in other cases. Is described.
[0075]
  Next, referring to FIGS.ImplementationExampleAppliedThe playback process of the playback device will be described. First, in FIG. 36, it is determined whether the reproduced signal is audio title set (ATS) single data or both still image data (step S500). Only ATS and still images are reproduced (step S502).
[0076]
In FIG. 37, first, it is determined whether the sampling frequency is the first sampling frequency that is a multiple of 48 kHz or the second sampling frequency that is a multiple of 44.1 kHz (step S600). The speed is set to the first frame speed (1/600 seconds) (step S601), while in the case of the second sampling frequency, the frame speed is set to the second frame speed (1 / 551.25 seconds). (Step S602). At this time, the determined sampling frequency may be displayed (step S603).
[0077]
In FIG. 38, it is first determined whether or not the sampling frequency fs is 192 kHz (step S700). If the sampling frequency fs is 192 kHz, the emphasis circuit is turned off (step S703). If it is not 192 kHz, it is determined whether or not the audio emphasis flag is on (step S701). If it is on, the emphasis circuit is turned on (step S702). Proceed to turn off the emphasis circuit.
[0078]
In FIG. 39, first, it is determined whether or not the sampling frequency fs is 176.4 kHz (step S800). If it is 176.4 kHz, the emphasis filter operation is turned off (step S803). If it is not 176.4 kHz, it is determined whether the audio emphasis flag is on (step S801). If it is on, the emphasis filter operation is turned on (step S802). In step S803, the emphasis circuit is turned off.
[0079]
  40 and 41 show an encoding apparatus. FIG.ImplementationFor exampleApplyAudio signal encoding deviceOne formFIG. 41 is a block diagram showing the signal processing circuit of FIG. 40 in detail.
[0080]
In FIG. 40, the analog audio signal A is sampled by the A / D converter 31 at a sufficiently high sampling frequency (sampling period Δt), for example, 192 kHz, and converted to a 24-bit high-resolution PCM signal, for example, to a high-resolution curve α Corresponding data column
xb1, x1, xa1, x2, xb2, x3, xa2,..., xbi, x2i-1, xai, x2i,.
Is converted to This data string (xbi, x2i-1, xai, x2i) is encoded by the signal processing circuit 32 and the memory 33 shown in detail in FIG. 41, and then applied to the DVD audio formatting unit 34.
[0081]
The configuration of the signal processing circuit 32 will be described in detail with reference to FIG. First, a band-limited low-resolution curve is obtained from a data string (xbi, x2i-1, xai, x2i) corresponding to a high-resolution curve α by a low-pass filter 36 that passes a half band, for example, an FIR filter. Data sequence corresponding to β
xc1, *, *, *, xc2, *, *, *, xc3, *, *, *, ..., xci, *, *, *, ...
Next, the data “*” in this data string is thinned out by the thinning circuit 37 to obtain the data string.
xc1, xc2, xc3, ..., xci, ...
Is generated. Here, the data string xci is a data string in which the digital data A / D converted by the A / D converter 31 is band-limited and the sampling frequency is reduced to ¼.
[0082]
Further, the data string is obtained by thinning out the data xi from the data string (xbi, x2i-1, xai, x2i) by the thinning circuit 38.
xb1, xa1, xb2, xa2, ..., xbi, xai, ...
Is generated.
[0083]
Then, based on these data strings xci, xbi, and xai, an adder 39 acting as a difference calculator makes a difference.
xbi-xci = Δ1i
xai-xci = Δ2i
Is calculated. Here, the difference data Δ1i, Δ2i is, for example, 24 bits or less, and the number of bits may be fixed or variable.
[0084]
The allocation circuit 40 packs the data string xci and the difference data Δ1i and Δ2i into user data (see FIG. 13) (1 packet = 2403 bytes), and outputs the user data to the DVD formatting unit 34.
[0085]
Further, the video signal V is converted into a digital signal by the A / D converter 31V, and then this digital video signal is encoded into the MPEG format by the V encoder 32V, and then packed into the user data shown in FIG. 34 is applied. Then, the DVD formatting unit 34 packs in a format as shown in FIGS. The data formatted by the DVD formatting unit 34 is modulated by the modulation circuit 35 according to the modulation method corresponding to the disk, and the disk is manufactured based on the modulated data.
[0086]
  Next, referring to FIGS.otherThe DVD-audio disk of the embodiment will be described. First, as shown in FIG. 42 (A), the data structure of this embodiment is roughly AMG (audio manager), SPS (still picture set) and multiple ATS (audio title set) shown in detail in FIG. Have ATS is in order from the top
-ATSI (ATS information),
Audio object set (AOTT-AOBS) for audio-only title shown in detail in FIGS.
-It is configured with ATSI for backup.
[0087]
ATSI in order from the top
・ ATSI-MAT (ATSI management table) shown in detail in FIGS.
It is composed of ATS-PGCIT (ATS program chain information table) shown in detail in FIGS.
[0088]
As shown in detail in FIG. 43, the AOTT-AOBS is composed of a plurality of audio objects for audio only titles (AOTT-AOB). Each of AOTT-AOB is composed of a plurality of programs (PG), and each of the programs is composed of a plurality of cells (ATS-C).
The AOTT-AOB is composed of two types of AOTT-AOB, which includes only audio data and one that includes audio data and real time information data (RTI data). One or more types of AOTT-AOB are arranged in one disc or one song.
[0089]
Each program of the first AOTT-AOB including only audio data is composed of a plurality of audio cells (ATS-C), and this audio cell is composed of only a plurality of audio packs.
[0090]
Each program of the second AOTT-AOB including the audio data and the RTI data is composed of a plurality of audio cells (ATS-C), and the audio cell includes the RTI pack arranged at the second pack position and other packs. The audio pack is arranged at the position.
[0091]
The A-pack of linear PCM is composed of 2048 bytes or less, and the breakdown is composed of a 14-byte pack header and an A packet as shown in FIG. The A packet is composed of a packet header of 17, 9 or 14 bytes, a private header shown in detail in FIG. 45, and audio data (linear PCM) of 1 to 2011 bytes.
[0092]
The private header is as shown in FIG.
An 8-bit substream ID;
A 3-bit reserved area;
-5-bit UPC / EAN-ISRC (Universal Product Code / European Article Number-International Standard Recording Code) number;-8-bit UPC / EAN-ISRC data;
-8-bit private header length,
A 16-bit first access unit pointer;
・ 8-byte audio data information (ADI)
・ 0 to 8 bytes of stuffing bytes
It is comprised by.
[0093]
ADI is
1-bit audio emphasis flag,
A 1-bit reserved area;
-1-bit downmix mode,
・ Effectiveness of 1-bit downmix code,
・ 4-bit downmix code,
A quantization word length “1” of a 4-bit group “1”;
A quantization word length “2” of a 4-bit group “2”;
A 4-bit group “1” audio sampling frequency fs1,
A 4-bit group “2” audio sampling frequency fs2,
A 4-bit reserved area;
・ 4-bit multi-channel type,
-Bit shift data (see Fig. 47) of the 3-bit channel group "2"
-5-bit channel allocation information (see Fig. 53);
・ 8-bit dynamic range control information
・ 8 × 2 bits reserved area
It is comprised by.
[0094]
In the 8-bit (b7 to b0) UPC / EAN-ISRC data area, different data is arranged according to the UPC / EAN-ISRC number as shown in FIG. That is,
(1) When UPC / EAN-ISRC number = 1
Upper 2 bits b7, b6: reserved
Lower 6 bits b5 to b0: Country code (ISRC # 1)
(2) When UPC / EAN-ISRC number = 2
Upper 2 bits b7, b6: reserved
Lower 6 bits b5 to b0: Country code (ISRC # 2)
(3) When UPC / EAN-ISRC number = 3
Upper 2 bits b7, b6: reserved
Lower 6 bits b5 to b0: Copyright holder code (ISRC # 3)
(4) When UPC / EAN-ISRC number = 4
Upper 2 bits b7, b6: reserved
Lower 6 bits b5 to b0: Copyright holder code (ISRC # 4)
(5) When UPC / EAN-ISRC number = 5
Upper 2 bits b7, b6: reserved
Lower 6 bits b5 to b0: Copyright holder code (ISRC # 5)
(6) When UPC / EAN-ISRC number = 6
Upper 4 bits b7 to b4: reserved
Lower 4 bits b3 to b0: Recording year (ISRC # 6)
(7) When UPC / EAN-ISRC number = 7
Upper 4 bits b7 to b4: reserved
Lower 4 bits b3 to b0: Recording year (ISRC # 7)
[0095]
In the area of linear PCM data, which is actual data in the A pack, bits of data of each channel of the group “2” are arranged to be reduced in order to improve the S / N ratio and reduce the bits. FIG. 47A shows PCM data of 6 channels (group “1” = Ch1 to Ch3, group “2” = Ch4 to Ch6) as an example, and the level range is MAX = 0 dB to MIN = −144 dB (24 bits). The values of each channel Ch are as follows.
Lmax2> Lmax1 = Lmax3> Lmax4> Lmax5> Lmax6
Then, with the word lengths of Ch1 to Ch3 of the group “1” as they are, the value of Ch2 is the largest in this example, so the levels of Ch4 to Ch6 of the group “2” are upshifted by (0−Lmax2) dB. Thus, 0 to 4 bits on the LSB side are reduced. In the example shown in FIG. 47, each level of Ch4 to Ch6 is upshifted by the maximum number of bits = 4 and reduced to 20 bits.
[0096]
Next, the configuration of the RTI pack will be described in detail with reference to FIG. This pack is composed of a 14-byte pack header and an RTI packet. The RTI packet is composed of a 17- or 14-byte packet header, a private header, and 1 to 2015-byte RTI data. RTI data is character information and reproduction control information related to audio data.
[0097]
The private header of the RTI packet is
A 1-byte substream ID,
-2-byte UPC / EAN-ISRC number and data (in the figure, these are simply expressed as ISRC),
-1 byte private header length,
-1-byte RTI information ID,
・ 0-7 byte stuffing byte
It is comprised by.
The UPC / EAN-ISRC number and data are the UPC / EAN-ISRC number and data related to the copyright of the still picture stored in the SPCT pack.
[0098]
As shown in FIG. 49A, the SPS (still picture set) has SP address information (SPAI) and a plurality of SPUs (still picture units) # 1 to #n, and each of the SPUs # 1 to #n Each of the plurality of SPs # 1 to #n has a plurality of SPCT (still picture) packs. As shown in detail in FIG. 49B, the SPCT pack is composed of a 14-byte pack header and an SPCT packet, and the SPCT packet is composed of a 22-, 19-, or 9-byte packet header and SPCT data of 2015 bytes or less. . Here, one still picture is compressed by the MPEG1 or MPEG2 system, is composed of an I picture and an intra-coded picture, is divided within one picture cell, and is arranged as SPCT data of an SPCT pack.
As described in the RTI pack, the UPC / EAN-ISRC number and data related to the still picture copyright may be included in the packet header of the SPCT pack.
[0099]
The ATSI-MAT shown in FIG. 42A is composed of 2048 bytes (relative byte positions RBP0 to 2047) as shown in detail in FIG.
A 12-byte (RBP 0-11) ATS identifier (ATS-ID);
4 bytes (RBP 12-15) ATS end address (ATS-EA),
A 12-byte (RBP 16-27) reserved area;
-4-byte (RBP28-31) ATSI end address (ATSI-EA),
・ Version number (VERN) of 2 bytes (RBP 32-33),
94 bytes (RBP 34 to 127) reserved area,
-4-byte (RBP128-131) ATSI-MAT end address;
-60 bytes (RBP 132-191) reserved area;
4 bytes (RBP 192 to 195) AOTT VTS start address,
・ Start address of AOBS for AOTT of 4 bytes (RBP196-199) or VOBS for AOTT,
A reserved area of 4 bytes (RBP 200 to 203);
4 bytes (RBP 204 to 207) of ATS-PGCIT start address,
-48 bytes (RBP 208-255) reserved area,
-AOB attribute for AOTT (AOTT-AOB-ATR) of 128 (16x8) bytes (RBP 256 to 383) or VOB audio stream attribute for AOTT (AOTT-VOB-AST-ATR);
A coefficient (ATS-DM-COEFT # 0 to # 15) of 288 (18 × 8) bytes (RBP 384 to 661) for downmixing multi-channel audio data to two channels;
A 32-byte (RBP 672-703) reserved area;
Two-byte (RBP 704 to 705) attributes of still picture data (ATS-SPCT-ATR) in AOBS for AOTT,
-It is composed of a reserved area of 1342 bytes (RBP 706 to 2047).
[0100]
In the area of 128 (16 × 8) bytes (RBPs 256 to 383), when this ATS has an AOTS for AOTT, AOTT-AOB-ATR shown in detail in FIG. 51 is described. This AOTT-AOB-ATR (b127-b0) is in order from the MSB side.
An audio encoding mode of 8 bits (b127 to b120);
An 8-bit (b119 to b112) reserved area;
A quantization bit number Q1 of a channel group “1” of 4 bits (b111 to b108);
A quantization bit number Q2 of a channel group “2” of 4 bits (b107 to b104);
A sampling frequency fs1 of a channel group “1” of 4 bits (b103 to b100);
A sampling frequency fs2 of a 4-bit (b99 to b96) channel group “2”;
3 bit (b95 to b93) multi-channel structure type;
-Channel assignment of 5 bits (b92 to b88);
-It is composed of a reserved area of 8 bits x 11 (b87 to b0).
[0101]
On the other hand, when this ATS does not have AOTS for AOTT, AOTT-VOB-AST-ATR shown in FIG. 52 is described. This AOTT-VOB-AST-ATR (b127-b0) is in order from the MSB side.
An audio encoding mode of 8 bits (b127 to b120);
An 8-bit (b119 to b112) reserved area;
A 4-bit (b111 to b108) quantization bit number Q;
A 4-bit (b107 to b104) reserved area;
A sampling frequency fs of 4 bits (b103 to b100),
A 4-bit (b99 to b96) reserved area;
3 bit (b95 to b93) multi-channel structure type;
-Channel assignment of 5 bits (b92 to b88);
3 bit (b87 to b85) decoding audio stream number;
A 5-bit (b84 to b80) reserved area;
A 2-bit (b79, b78) MPEG audio DRC;
A 2-bit (b77, b76) reserved area;
A 4-bit (b75-b72) number of compressed audio channels;
-It is composed of a reserved area of 8 bits x 9 (b71 to b0).
[0102]
The above data is shown in detail below. However, the number of quantization bits, the sampling frequency, and the multichannel type are the same as those in FIG.
(1) Audio encoding mode (b127 to b120)
00000000b: Linear PCM mode
00000001b: Reserved for compressed audio (Dolby Digital)
00000010b: reserved for compressed audio (no MPEG2 extension)
00000011b: Reserved for compressed audio (with MPEG2 extension)
00000100b: reserved for compressed audio (DTS)
00000101b: Reserved for compressed audio (SDDS)
Other: Reserved for other encoding modes
[0103]
(8) Channel assignment (b92 to b88)
FIG. 53 shows channel assignment information of groups “1” and “2” from 1 channel (monaural) to 6 channels. Incidentally, the symbols shown in the figure will be described below.
C (mono): Monaural
L, R: 2-channel stereo
Lf: multi-channel left front
Rf: Multi-channel right front
C: Multi-channel center
LFE: Multi-channel Low Frequency Effect
S: Multi-channel surround
Ls: Multi-channel left surround
Rs: Multi-channel light surround
[0104]
(9) Number of decoding audio streams (b87 to b85)
“0” or “1”
(10) DRC for MPEG audio (b79, b78)
00b: There is no DRC data in the MPEG audio stream.
01b: DRC data exists in the MPEG audio stream.
[0105]
(11) Number of compressed audio channels (b75 to b72)
“1111b” when the audio encoding mode is linear PCM audio
0000b: 1ch (mono)
0001b: 2ch (stereo)
0010b: 3ch
0011b: 4ch
0100b: 5ch
0101b: 6ch
0110b: 7ch
0111b: 8ch
Other: Hold
[0106]
In the area of 288 (18 × 16) bytes (RBP 384 to 671) shown in FIG. 50, table numbers “0” to “15” as shown in FIG. 54 for down-mixing multi-channel audio data into two channels. Each downmix coefficient (ATS-DM-COEFT # 0 to # 15) is described in 18 bytes.
[0107]
The 2-byte area (RBP 704, 705) shown in FIG. 50 describes the still picture data attribute (ATS-SPCT-ATR) in AOTS for AOTT in order from the MSB side as shown in detail in FIG.
2 bit (b15, b14) video compression mode;
A 2-bit (b13, b12) TV system;
An aspect ratio of 2 bits (b11, b10);
-2-bit (b9, b8) display mode;
A 2-bit (b7, b6) reserved area;
-The resolution of the 3-bit (b5-b3) source picture;
-It is composed of a reserved area of 3 bits (b2 to b0).
[0108]
The contents of the ATS-SPCT-ATR are shown in detail below.
(1) Video compression mode (b15, b14)
00b: MPEG1 compatible
01b: MPEG2 compatible
Other: Hold
(2) TV system (b13, b12)
00b: 525/60
01b: 625/60
Other: Hold
(3) Aspect ratio (b11, b10)
00b: 4: 3
11b: 16: 9
Other: Hold
(4) Display mode (b9, b8)
00b: Hold
01b: Hold
10b: Only letterbox is allowed
11b: Not described.
(5) Source picture resolution (b5 to b3)

Other: Hold
[0109]
The ATS-PGCIT (ATS program chain information table) shown in FIG. 42A is in order from the top as shown in detail in FIG.
Audio title set PGCI table information (ATS-PGCITI) shown in detail in FIG.
58 audio title set PGCI search pointers (ATS-PGCI-SRP # 1 to #n) shown in detail in FIGS.
It is composed of a plurality of audio title sets PGCI shown in detail in FIG.
[0110]
The ATS-PGCITI is composed of 8 bytes as shown in detail in FIG.
The number of 2-byte ATS-PGCI-SRP # 1 to #n,
A 2-byte reserved area;
-Consists of a 4-byte ATS-PGCIT end address. Each of ATS-PGCI-SRP # 1 to #n is composed of 8 bytes as shown in detail in FIG.
As shown in detail in FIG. 59, a 4-byte ATS-PGC category (ATS-PGC-CAT),
-It consists of a 4-byte ATS-PGCI end address.
[0111]
The above 4-byte (b31 to b0) ATS-PGC categories are in order from the top as shown in FIG.
-1-bit (b31) entry type,
7 bit (b30 to b24) ATS audio title number (ATS-TTN);
-2 bit (b23, b22) block mode;
-2-bit (b21, b20) block type;
-The number of audio channels of 4 bits (b19 to b16);
An 8-bit (b15 to b8) audio encoding mode;
-It is composed of a reserved area of 8 bits (b7 to b0).
[0112]
The contents of the category (ATS-PGC-CAT) are shown in detail below.
(1) Entry type (b31)
0b: Not an entry PGC
1b: Entry PGC
(2) Number of ATS audio titles (b30 to b24)
The number of audio titles of this ATS is described in the range of “1” to “99”.
(3) Block mode (b23, b22)
00b: Not ATS-PGC of ATS-PGC block
01b: First ATS-PGC of the ATS-PGC block
10b: Hold
11b: ATS-PGC at the end of the ATS-PGC block
(4) Block type (b21, b20)
00b: Not part of this block
01b: Difference block only in audio coding mode
10b: Difference block of audio channel only
11b: difference block for both audio coding mode and audio channel
(5) Number of audio channels (b19 to b16)
0000b: 2 channels or less
0001b: over 2 channels
[0113]
Each of the audio title sets PGCI (ATS-PGCI) shown in FIG. 56 is in order from the top as shown in FIG.
ATS-PGC general information (ATS-PGC-GI) shown in detail in FIGS. 61 and 62;
ATS program information table (ATS-PGIT) shown in detail in FIGS.
It is configured by an ATS cell playback information table (ATS-C-PBIT) shown in detail in FIGS.
[0114]
The ATS-PGC-GI is composed of 16 bytes (RBP0 to 15) as shown in detail in FIG.
-4-byte (RBP0-3) ATS-PGC content (ATS-PGC-CNT) shown in detail in FIG.
4 bytes (RBP4-7) ATS-PGC playback time (ATS-PGC-PB-TM),
A 2-byte (RBP8, 9) reserved area;
A 2-byte (RBP10, 11) ATS-PGIT start address;
A 2-byte (RBP 12, 13) ATS-C-PBIT start address;
-It consists of a reserved area of 2 bytes (RBP14, 15).
[0115]
The above 4-byte (b31 to b0) ATS-PGC contents are in order from the top as shown in FIG.
A 17-bit (b31 to b15) reserved area;
・ The number of programs of 7 bits (b14 to b8)
-It is configured by the number of cells of 8 bits (b7 to b0). The number of programs is in the range of “1” to “99”, and the number of cells is in the range of “1” to “255”.
[0116]
The ATS program information table (ATS-PGIT) shown in FIG. 60 includes n ATS program information (ATS-PGI) # 1 to #n as shown in detail in FIG. Each of ATS-PGI # 1 to #n is composed of 20 bytes (RBP0 to 19) as shown in detail in FIG.
-4-byte (RBP0-3) ATS-PG content (ATS-PG-CNT) shown in detail in FIG.
1 byte (RBP4) ATS-PG entry cell number,
-1 byte (RBP5) reserved area;
The start presentation time (FAC-S-PTM) of the first audio cell of the 4-byte (RBP 6-9) ATS-PG;
4 bytes (RBP 10-13) of ATS-PG playback time,
4 bytes (RBP 14-17) ATS-PG pause time,
1 byte (RBP18) reserved area (for copyright management data CMI),
-1 byte (RBP19) reserved area
It is comprised by.
[0117]
The 2-byte (b31-0) ATS-PG content is in order from the top as shown in FIG.
1 bit (b31), the relationship between the previous and current PG (R / A),
1-bit (b30) STC discontinuity flag (STC-F);
・ The number of attributes (ATRN) of 3 bits (b29 to b27),
3 bit (b26 to b24) channel group (ChGr) “2” bit shift data;
A 2-bit (b23, b22) reserved area;
1-bit (b21) downmix mode (D-M),
・ Effectiveness of 1-bit (b20) downmix coefficient (shown *),
A 4-bit (b19 to b16) downmix coefficient table number (DM-COEFTN);
Each is composed of RTI flags F15 to F0 of 1 bit and 16 bits (b15 to b0) in total.
[0118]
The ATS cell playback information table (ATS-C-PBIT) shown in FIG. 60 includes n ATS cell playback information (ATS-C-PBI) # 1 to 1 as shown in detail in FIG. #N. Each of ATS-C-PBI # 1 to #n is composed of 12 bytes (RBP0 to 11) as shown in detail in FIG.
1-byte (RBP0) ATS-C index number;
As shown in detail in FIG. 68, a 1-byte (RBP1) ATS-C type (ATS-C-TY),
A 2-byte (RBP2, 3) reserved area;
4 bytes (RBP 4-7) ATS-C start address,
• It is composed of an ATS-C end address of 4 bytes (RBP 8 to 11).
[0119]
The 1-byte (b7 to b0) ATS-C type is in order from the top as shown in FIG.
A 2-bit (b7, b6) ATS cell element (ATS-C-COMP);
A 2-bit (b5, b4) reserved area;
-It is composed of 4-bit (b3 to b0) ATS cell applications (ATS-C-Usage).
[0120]
The contents of the data are shown in detail below.
(1) ATS cell element (b7, b6)
00b: Audio cell consisting only of audio data
01b: Audio cell consisting of audio data and real-time information
10b: Silence cell consisting only of audio data for silence
11b: Picture cell consisting only of still pictures
(2) ATS cell application (b3 to b0)
0000b: No description
0001b: Spotlight part
Other: Hold
[0121]
Next, an encoding apparatus applied to the present invention will be described. 69 and 70 show the configuration and processing of the encoding apparatus, respectively. The analog audio signal A is sampled by the A / D converter 31 at a sufficiently high sampling frequency (sampling period Δt), for example, 192 kHz, and converted to a 24-bit high resolution PCM signal, for example. In the subsequent bit shift / signal processing circuit 32, when compression is not performed, the PCM data converted by the A / D converter 31 is applied to the DVD formatting unit 34 as it is. On the other hand, when compression is performed, the PCM data converted by the A / D converter 31 is compressed by the bit shift / signal processing circuit 32 according to the encoding mode, and then applied to the DVD formatting unit 34. (Steps S5 and S6). In the bit shift / signal processing circuit 32, each channel of the group “2” is bit-shifted.
[0122]
The video signal V is converted into a digital signal by the A / D converter 31V, and then the digital video signal is encoded into the MPEG format by the V encoder 32V and applied to the DVD formatting unit 34 (steps S1 and S2). . The still image signal SP is converted into a digital signal by the A / D converter 31SP, and then the digital still image signal SP is encoded into the MPEG format by the compression encoder 32SP and applied to the DVD formatting unit 34 (step S3). , S4). In addition, copyright information and real-time text information (RTI) are applied via the interface (I / F) 40 (steps S7 and S8), and character information and disc identifier EX are applied to the DVD formatting unit 34 (step S7). S9, S10).
[0123]
Then, the DVD formatting unit 34 packs in the format as described above (step S11). The data formatted by the DVD formatting unit 34 is modulated by a modulation circuit 35 in accordance with a modulation method corresponding to the disc, and a disc is manufactured based on the modulated data, recorded once in the recording unit 38, or communicated. The data is transmitted via the I / F 39 (step S12).
[0124]
71 shows a specific configuration of the decoding apparatus according to the present invention, and FIG. 72 functionally shows the configuration of FIG. FIG. 73 shows the processing. 71 and 72, first, similarly to the case shown in FIG. 19, when a music piece selection, playback, fast forward, and stop operation is performed by the operation unit 18 or the remote control device 19, the control unit 23 drives according to the operation. The device 2 and the playback device 17 are controlled, and at the time of playback, the pit data recorded on the DVD audio disk 1 is read by the drive device 2 and then EFM demodulated.
[0125]
In the playback device 17, this signal is sent to the still image / V pack detection unit 3 and the A / RTI pack detection unit 9. When still image packs and V packs are recorded on the disc 1, the still image and V pack detection unit 3 detects the still image packs and V packs in the reproduction data and sets control parameters in the parameter unit 8. At the same time, the still image pack and the V pack are sequentially written in the still image and V pack buffer 4. The still picture pack and user data (video signal, still picture information) written in the still picture pack and the V pack buffer 4 are stored in the still picture pack and the SCR in the V pack by the buffer extraction unit 5 (see FIG. 13). Are extracted in the order of packs and in the order of output time, and then output as analog video signals via the decompression and image conversion unit 6, the D / A conversion unit 7, and the video output terminals 15 and 15 '.
[0126]
The A and RTI pack detection unit 9 detects the A pack and RTI pack in the reproduction data, sets control parameters in the parameter unit 14, and sequentially writes the A pack and RTI pack in the A and RTI pack buffer 10. User data (audio signal, real-time information) in the A pack and the RTI pack written in the A and RTI pack buffer 10 is extracted by the buffer extraction unit 11 in the order of the pack and in the order of the output time. The audio signal is output as an analog audio signal via the PCM conversion and bit shift / signal processing unit 12, the D / A conversion unit 13, and the audio output terminal 16. The real-time information is sent to the display signal generation unit 20 to generate a display signal. This display signal is output via the display signal output terminal 22 or output to the built-in character display unit 21.
[0127]
The processing of this decoding apparatus will be described with reference to FIG. First, the recorded data is read by accessing the disk 1 (step S20), and then in each of the separation steps S21 to S29, a video signal, a still image signal, an audio signal, copyright information and real-time information (RTI), and characters Information and disc identifier (EX) are separated. Next, in each decoding step S22 to S30, each separated data is decoded and then reproduced synchronously (steps S31 and S32).
[0128]
Here, there are the following three processes for reproducing the still image SP.
1) When the still image SP is obtained, the reproduction of the audio signal A is interrupted and muted.
2) When the still image SP is obtained, it is reproduced together with the audio signal A based on the time control signal.
3) When the still image SP is obtained, the page turning reproduction is performed based on the page turning command instructed by the user. At this time, the audio signal A is reproduced as it is.
[0129]
When it is necessary to synchronize the still image with the audio, the time control signal for real-time synchronization is added to the ATSI of FIG. 42B, the time under the still picture control information table SPCIT provided. It is placed in the control data information (SPCIT-TCDI).
[0130]
Further, still picture page control command information (SPPI) containing a page turning command is placed under SPCIT. Thus, SPCIT is composed of general information SPCIT general information (SPCIT-GI), time control data information (SPCIT-TCDI), and still picture page control command information (SPPI). .
[0131]
Here, the side information for page control of the still picture can be included in the still picture data of the SPCT pack of FIG. The page control data defined by the side information is interpreted and referred to with reference to SPPI.
[0132]
If there is not enough capacity to fit in the still picture data, it is acceptable to include side information for page control of the above still picture in the RTI data of the RTI pack.
[0133]
FIG. 74 reproduces a signal recorded on a disc 110 such as a DVD audio disc or a DVD video disc on which time information and a page turning command are recorded in order to synchronize a still image with audio as shown in FIG. An apparatus for doing this is shown. The disk drive device 111 is controlled by a drive control circuit 112, and the disk 110 is driven by the disk drive device 111 to read a recording signal. This signal is EFM demodulated by the demodulator / error correction circuit 113 and then error-corrected, and then the stream signal excluding the control data and DSI data is written to the track buffer 114 by the write control circuit 115, and the control data and DSI Data is written to the system buffer 117 and the DSI buffer 122, respectively. The data written in the DSI buffer 122 is decoded by the DSI decoder 151 and output.
[0134]
The system controller 132 performs playback control based on the control data written in the system buffer 117. The system controller 132 includes an operation unit 130, a display unit 131, a readable / writable system parameter memory 133, a playback-only system parameter memory 134, and a readable / writable general-purpose parameter memory 135 for performing playback control. And a system timer 136 are connected.
[0135]
The stream signal written to the track buffer 114 is read by the read control circuit 116, and then separated by the demultiplexer 128 into a still image pack, an RTI pack, a VBV pack, a sub-picture pack, a VBI pack, and an audio pack. Each pack is stored in the still image buffer 147, the RTI buffer 148, the VBV buffer 118, the sub-picture buffer 119, the VBI buffer 120, and the audio buffer 121, respectively. The still picture pack and the RTI pack are decoded and output by the still picture decoder 149 and the RTI decoder 150, respectively, and the RTI data decoded by the RTI decoder 150 is stored in the buffer 150 '.
[0136]
The VBV pack is decoded by the video decoder 123 and then sent to the adder 127 via the letterbox converter 126. The sub-picture pack and the VBI pack are decoded by the sub-picture decoder 124 and the VBI decoder 125, respectively, and sent to the adder 127. The adder 127 combines these video signals. The audio pack is sent to the audio decoder 129 and converted into an analog signal by the format decomposer 141, the channel separator 142, and the D / A converters 144 and 145 therein.
[0137]
Next, still image reproduction processing will be described with reference to FIGS. There are two playback processes (types “1” and “2”). In FIG. 75, first, when playback is started, still image data is accessed and stored in the still image buffer 147 (step S61). ). At this time, the audio data is not reproduced and remains silent for 1 to 3 seconds. Next, it is determined whether or not the type is "1" (step S62). If the type is "1", the audio data is accessed and the time control data information (SPCIT-TCDI) shown in FIG. That is, based on the time control information, it is reproduced in synchronization with the still image data (step S63). On the other hand, if the type is not “1”, the audio data is accessed and reproduced (step S64).
[0138]
In this type “2” processing, as shown in FIG. 76, when an interrupt is generated by a user command, the command is interpreted (step S65), and the still image / page control command information (SPPI) is stopped according to the command. The page is turned to “next” or “return to the previous” of the image, and “removal”, “enlargement” or the like is reproduced (step S66). The still image processing of this type “2” is not synchronized with the audio signal and does not affect the reproduction of the audio signal.
[0139]
Next, a modification of the audio decoder 129 will be described in detail with reference to FIGS. 77 and 78. FIG. In this modification, a sample rate converter 143 is added. First, the audio pack is decomposed by the format decomposer 141 and then separated by the channel separator 142 into PCM data of each channel. The system controller 132 determines the sampling frequency fs of the audio data decomposed by the format decomposer 141. When the sampling frequency fs is 48 kHz of the first system, the audio data is transferred from the channel separator 142 to the switches 146 and 147. In the case of 44.1 kHz in the second system, the sample rate converter 143 causes the 48 kHz of the first system as shown in FIG. 78 (A). The up-sampled audio data is sent to the D / A converters 144 and 145 via the switches 146 and 147.
[0140]
Also, in the case of 96 kHz of the first system, it is sent as it is from the channel separator 142 via the switches 146 and 147 to the D / A converters 44 and 45, and on the other hand, in the case of 88.2 kHz of the second system. Also, the sample rate converter 143 up-samples to 96 kHz of the first system as shown in FIG. 78 (A) and sends it to the D / A converters 44 and 45 via the switches 146 and 147. Therefore, the D / A converters 144 and 145 can be configured only by the first system. Note that the sampling frequency fs of the D / A converters 144 and 145 is controlled by the system controller 132.
[0141]
Instead of converting the sampling frequency fs from the second system to the first system, as shown in FIG. 78 (B), 48 kHz and 96 kHz of the first system are changed to 44.1 kHz and 88. You may make it convert into 2 kHz. Even if each channel of the multi-channel signal has the first sampling frequency fs, for example, when a certain channel is 48 kHz as shown in FIG. The reproduction sound quality can be improved by performing D / A conversion at 96 kHz.
[0142]
Next, with reference to FIG. 79 and FIG. 80, a playback apparatus that displays copyright information in a superimposed manner will be described. In FIG. 79, the still image pack is sent to the still image decoder 149 via the still image buffer 147 to decode the still image data, and this still image data is applied to the adder 201. The RTI pack is sent to the RTI decoder 150 via the RTI buffer 148 and decoded, and the decoded data is stored in the buffer 150 '. At this time, when the RTI pack includes copyright data (UPC / EAN-ISRC data shown in FIGS. 45 and 46), the text character information is converted into character image data by the image conversion unit 200 and applied to the adder 201. Then, it is combined with the still image and output to the outside, or output to the outside via the switch 203.
[0143]
The audio pack is decomposed by the format decomposer 141 via the audio buffer 121, and each data is stored in the buffer 141 '. At this time, if the audio pack includes copyright data (UPC / EAN-ISRC data shown in FIGS. 45 and 46), the copyright data is converted into text character information by the code conversion unit 202, and is sent via the switch 203. Output to the outside.
[0144]
The operation will be described with reference to FIG. First, when an instruction to display copyright information of a still image is transmitted from the operation unit 130, the still image decoded from the still image pack and the copyright information decoded from the RTI pack and converted into image data are displayed. The signals are added and output by the adder 201 (steps S71 → S72). On the other hand, when there is no instruction to display the copyright information of the still image, the copyright information decoded from the RTI pack is not added (step S71 → S73), and then the instruction to display the copyright information of the audio signal is displayed on the operation unit. It is determined whether or not it is transmitted from 130 (step S74). If there is a display instruction, the copyright information decoded from the audio pack is converted into text character information by the code conversion unit 202 and RTI is output via the switch 203 (steps S74 → S75). When there is no display instruction, RTI output is not performed. This process is performed in units of cells or tracks.
[0145]
Here, the audio decoder having the configuration shown in FIG. 77 and the copyright information reproducing apparatus (and audio decoder) shown in FIG. 79 are not only incorporated into the disc reproducing apparatus shown in FIG. It can be configured as an IC chip as a single unit and used as a part of a DVD video playback apparatus or personal computer.
[0146]
  Next, the digital audio signal formatted as described above is transmitted via a communication line.ExampleWill be described. First, the packing apparatus on the transmission side will be described with reference to FIGS. As shown in FIG. 81, the packing apparatus includes a packing processing unit 30, a buffer memory 30B, a control circuit 29, an operation unit 27, and a display 28. 82 to 85, when the video signal V, the still image signal SP, the audio signal A, the real-time information RTI, and the disc identifier (EX) are input, in step S100, as shown in detail in FIG. A pack is generated (step S101), then a video pack is generated (step S102), then a still image pack is generated (step S103), and then real-time text is generated (step S104).
[0147]
Next, the cell (ATS-C) is managed (step S200), then the PTT (part of title) is managed (step S300), then the title (AOTT-AOB) is managed (step S400), and then the title set (AOTT) -Manage AOBS (step S500) In the following step S600, in order to generate an ATS, a title set is generated as shown in detail in Fig. 84 (step S601), and then a menu is generated (step S602). -The category of PGCI is described (step S603), and then ATS-PGCIT is generated by generating PGCI composed of PG contents including bit shift and generating PGCI (step S604). By creating A Generating a SI (step S605). Then generate AMG (step S700), finally to produce a TOC (step S800).
[0148]
Next, when the digital audio signal formatted as described above is transmitted via a communication line, as shown in FIG. 85, the transmission data stored in the transmission buffer is divided into predetermined lengths and packets are transmitted. Then, a header including the destination address is added to the beginning of the packet (step S42), and this is then output on the network (step S43).
[0149]
Next, the data receiving side will be described with reference to FIGS. As shown in FIG. 86, the unpacking device on the data receiving side includes an unpacking processing unit 60, a buffer memory 60B, a parameter memory 56, a control circuit 59, an operation unit 57, and a display 58. First, as shown in FIG. 87, the header is removed from the packet received from the network (step S51), then the received data is restored (step S52), and then transferred to the memory (step S53).
[0150]
Next, as shown in FIGS. 88 to 90, first, AMG is decoded to detect ATS (step S1100), and in the subsequent step S1200, in order to decode the ATSI of the target ATS, as shown in detail in FIG. ATS-PGCI category is decoded (step S1201), PGIT composed of PG content including bit shift is decoded (step S1202), MAT attributes and coefficients are then decoded (step S1203), and then these are decoded. Each parameter is set in the parameter memory 56 (step S1204).
[0151]
Then, when playback is started, the pack is identified (step S1300). In the following step S1400, the audio pack is decoded as shown in detail in FIG. 90 to decode the pack (step S1401), and then the video pack is decoded. Then, the still picture pack is decoded (step S1403), and then the real-time text is decoded (step S1404). Then, an audio signal, a video signal, a still image signal, and a real-time text signal decoded from each pack are output (step S1500), and the processing from step S1300 to step S1500 is repeated during reproduction.
[0152]
The encoding device and the decoding device can also be realized by storing the encoding method and the decoding method as a computer program in an IC chip such as a ROM and operating a CPU (central processing unit) of the computer by this program. The present invention is not only transmitted via a recording medium such as a DVD, but also when transmitted via a communication line such as the Internet or a karaoke communication line and processed by hardware or an application on a PC on the playback side. Can be applied.
[0153]
【The invention's effect】
  As described above, according to the present invention, a DVD audio title having audio data without including a playback control pack, instead of a DVD video title set and a management area including information for managing the DVD video title set. Since a management area including information for managing the set and the DVD audio title set is provided, the audio signal is mainly recorded.,It can be easily played back by the user and is easy to use, and real-time management can be simplified. MaTheMulti-channel audio data is divided into two groups, sampling frequencies are assigned, and bit-shift encoding is performed to improve the S / N ratio and reduce bits. This is effective for setting a desired signal recording time.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a DVD-video format and a DVD-audio format according to a first reference example;
FIG. 2 is an explanatory diagram showing in detail the format of the audio manager (AMG) in FIG. 1;
FIG. 3 is an explanatory diagram showing in detail the format of the audio title set (ATS) of FIG. 1;
4 is an explanatory diagram showing in detail the format of audio manager information (AMGI) in FIG. 2; FIG.
FIG. 5 is an explanatory diagram showing in detail the format of the audio title set attribute table (ATS-ATRT) of FIG. 4;
6 is an explanatory diagram showing in detail the format of audio title set attribute data (ATS-ATR) in FIG. 5; FIG.
7 is an explanatory diagram showing in detail the format of audio title set information (ATSI) in FIG. 3; FIG.
8 is an explanatory diagram showing in detail the format of the audio title set information management table (ATSI-MAT) in FIG. 7; FIG.
9 is an explanatory diagram showing in detail the audio title set menu, audio stream, and attribute data (ATSM-AST-ATR) in FIG. 8. FIG.
10 is an explanatory diagram showing in detail the format of the audio title set / audio stream / attribute table (ATS-AST-ATRT) of FIG. 8; FIG.
FIG. 11 is an explanatory diagram showing in detail the attribute data (ATS-AST-ATR) of each audio stream in FIG. 10;
12 is an explanatory diagram showing an audio content block unit (ACBU) in FIG. 1; FIG.
13 is an explanatory diagram showing in detail the format of the audio pack and video pack of FIG. 12; FIG.
14 is an explanatory diagram showing in detail the format of the audio control (A-CONT) pack of FIG. 12; FIG.
15 is an explanatory diagram showing in detail the format of the audio character display (ACD) area of FIG. 14. FIG.
16 is an explanatory diagram showing an example displayed by the name space information of FIG.
FIG. 17 is an explanatory diagram showing in detail the format of the audio search data (ASD) area of FIG. 14;
18 is an explanatory diagram showing a modification of the audio content block unit in FIG. 1. FIG.
FIG. 19 is a block diagram showing a DVD-audio disk playback device according to a first reference example;
FIG. 20 is a block diagram functionally showing the playback device of FIG.
FIG. 21 is an explanatory diagram showing in detail the format of audio manager information (AMGI) in the second reference example;
FIG. 22 is an explanatory diagram showing the TOC information of FIG. 21 in detail.
FIG. 23 is an explanatory diagram showing in detail the format of audio title set information (ATSI) in a modification of the second reference example;
FIG. 24 is a block diagram showing a DVD-audio disk playback device of a second reference example;
25 is a block diagram functionally showing the playback device of FIG. 24. FIG.
FIG. 26 is a block diagram showing TOC information and a playback device in a third reference example;
FIG. 27 is a flowchart for explaining AV synchronized playback processing;
FIG. 28 is a flowchart for explaining AV synchronized playback processing;
FIG. 29ImplementationIt is explanatory drawing which shows the basic format of the example DVD-audio disk.
30 is an explanatory diagram showing an audio data structure of the DVD-audio disc in FIG. 29; FIG.
FIG. 31 is an explanatory diagram showing a basic format of a DVD-Van disk.
FIG. 32 is an explanatory diagram showing a basic format of a DVD video disc.
FIG. 33 is an explanatory diagram showing a basic format of a DVD-Avd disc.
FIG. 34ImplementationIt is explanatory drawing which shows AOTT-AOB-ATR in the example DVD-audio disk.
FIG. 35ImplementationExample DVD-audioIt is explanatory drawing which shows the private header of the linear PCM in a disc.
FIG. 36ImplementationExampleAppliedIt is a flowchart which shows the reproduction | regeneration processing of ATS and a still image by a reproducing | regenerating apparatus.
FIG. 37ImplementationExampleAppliedIt is a flowchart which shows the frame reproduction | regeneration processing according to the sampling frequency of the audio data by a reproducing | regenerating apparatus.
FIG. 38ImplementationExampleAppliedIt is a flowchart which shows the emphasis reproduction | regeneration processing of the audio data by a reproducing | regenerating apparatus.
FIG. 39ImplementationExampleAppliedIt is a flowchart which shows the emphasis reproduction | regeneration processing of the audio data by a reproducing | regenerating apparatus.
FIG. 40ImplementationExampleAppliedIt is a block diagram of an encoding apparatus.
41 is a block diagram showing in detail the signal processing circuit of FIG. 40. FIG.
FIG. 42In other embodimentsIt is explanatory drawing which shows a data structure.
43 is an explanatory diagram showing in detail the audio object set for audio only title (AOTT-AOBS) in FIG. 42; FIG.
44 is an explanatory diagram illustrating an example of the audio pack of FIG. 43 in detail.
45 is an explanatory diagram showing in detail the private header of FIG. 44. FIG.
46 is an explanatory diagram showing the UPC / EAN-ISRC data in FIG. 45 in detail.
47 is an explanatory diagram showing a bit shift of the audio data in FIG. 44. FIG.
48 is an explanatory diagram showing in detail the real-time information (RTI) pack in FIG. 43. FIG.
49 is an explanatory diagram showing in detail the still picture set (SPS) in FIG. 43; FIG.
FIG. 50 is an explanatory diagram showing the audio title set information management table (ATSI-MAT) in FIG. 42 in detail.
51 is an explanatory diagram showing in detail the audio object attribute (AOTT-AOB-ATR) for audio-only titles of FIG. 50; FIG.
FIG. 52 is an explanatory diagram showing in detail the audio object title audio object audio stream attribute (AOTT-VOB-AST-ATR) in FIG. 50;
53 is an explanatory diagram showing in detail the channel assignment information of FIGS. 51 and 52. FIG.
54 is an explanatory diagram showing in detail the downmix coefficient (ATS-DM-COEFT) in FIG. 50; FIG.
FIG. 55 is an explanatory diagram showing in detail the still picture data attribute (ATS-SPCT-ATR) in FIG. 50;
56 is an explanatory diagram showing in detail the audio title set program chain information table (ATS-PGCIT) in FIG. 42; FIG.
FIG. 57 is an explanatory diagram showing the ATS-PGCIT information (ATS-PGCITI) in FIG. 56 in detail.
58 is an explanatory diagram showing in detail the ATS-PGCI search pointer (ATS-PGCI-SRP) of FIG. 56. FIG.
59 is an explanatory diagram showing in detail the ATS-PGC category (ATS-PGCI-CAT) of FIG. 58;
60 is an explanatory diagram showing in detail the audio title set program chain information (ATS-PGCI) in FIG. 56; FIG.
61 is an explanatory diagram showing in detail the ATS-PGC general information (ATS-PGC-GI) in FIG. 60; FIG.
FIG. 62 is an explanatory diagram showing in detail the ATS-PGC content (ATS-PGC-CNT) in FIG. 61;
63 is an explanatory diagram showing in detail the ATS program information table (ATS-PGIT) of FIG. 60. FIG.
64 is an explanatory diagram showing in detail the ATS program information (ATS-PGI) in FIG. 63; FIG.
65 is an explanatory diagram showing in detail the ATS-PG content (ATS-PG-CNT) in FIG. 64. FIG.
66 is an explanatory diagram showing in detail the ATS cell playback information table (ATS-C-PBIT) of FIG. 63; FIG.
67 is an explanatory diagram showing in detail the ATS cell playback information (ATS-C-PBI) of FIG. 66. FIG.
68 is an explanatory diagram showing in detail the ATS-C type (ATS-C-TY) in FIG. 67; FIG.
FIG. 69 is a block diagram showing an encoding apparatus according to an embodiment applied to the present invention.
70 is a flowchart showing processing of the encoding apparatus in FIG. 69. FIG.
FIG. 71 is a block diagram showing a decoding apparatus according to an embodiment of the present invention.
72 is a block diagram functionally showing the decoding device of FIG. 71. FIG.
73 is a flowchart showing processing of the decoding device of FIGS. 71 and 72. FIG.
FIG. 74 is a block diagram showing in detail the decoding apparatus according to the embodiment of the present invention.
75 is a flowchart showing an audio signal and still image data reproduction process of the decoding device of FIG. 74. FIG.
76 is a flowchart showing still image page turning processing of the decoding apparatus of FIG. 74; FIG.
77 is a block diagram showing a modification of the audio decoder in FIG. 74. FIG.
78 is an explanatory diagram showing processing of the sample rate converter of FIG. 77. FIG.
FIG. 79 is a block diagram illustrating in detail a copyright data display device of the decoding device according to the embodiment of the present invention;
80 is a flowchart showing copyright data display processing of the apparatus of FIG. 79. FIG.
Fig. 81 is an embodiment of the present invention.InIt is a block diagram which shows the packing apparatus in the case of transmitting an audio signal.
82 is a flowchart showing a packing process of the packing device of FIG. 81. FIG.
83 is a flowchart showing in detail the pack generation process of FIG. 82. FIG.
84 is a flowchart showing in detail the ATS generation process of FIG. 82. FIG.
85 is a flowchart showing a transmission process of the packing apparatus of FIG. 81. FIG.
Fig. 86 is an embodiment of the present invention.InIt is a block diagram which shows the unpacking apparatus in the case of transmitting an audio signal.
87 is a flowchart showing reception processing of the unpacking apparatus in FIG. 86. FIG.
88 is a flowchart showing an unpacking process of the unpacking apparatus in FIG. 86. FIG.
89 is a flowchart showing in detail the ATSI decoding process of FIG. 81. FIG.
90 is a flowchart showing in detail the pack decoding process of FIG. 88. FIG.
[Explanation of symbols]
VMG video manager (second management area)
VTS <1> Video title set
AMG Audio Manager (first management area)
ATS <1>, ATS <2> Audio title set
A pack 1st pack
AOB audio object
AOBS audio object set
ATSI Audio Title Set Information
ATSI-MAT Audio Title Set Information Management Table
RTI pack second pack
SPCT pack 3rd pack
121 Audio buffer (first buffer)
128 Demultiplexer (pack sorting means)
129 audio decoder (first decoder)
132 System controller (sampling frequency judgment means)
143 Sample rate converter (rate conversion means)
144,145 D / A converter (D / A conversion means)
147 Still image buffer (third buffer)
148 RTI buffer (second buffer)
149 Still picture decoder (third decoder)
150 RTI decoder (second decoder)
200 Image converter
201 Adder (composite display means)
202 Code converter

Claims (2)

The auxiliary signal recording area and the main signal recording area are continuously arranged in the main signal recording area.
Analog audio signals of the forward Maruchichiyaneru Chiyaneruguru - flop and, Chiyaneruguru for backward - allocated respectively to the flop front of Chiyaneruguru - Chiyaneruguru for flop and rear - quantized in number of bits and a sampling frequency different for each flop In addition, an audio package recorded as each digital audio signal is bit-shifted up by a common bit shift amount with respect to the channels of the rear channel group and the word length is reduced by the bit shift amount. An audio package in which an identifier indicating whether to permit or prohibit the down- mixing of the multi-channel to a stereo 2-channel is recorded in a private header provided in the audio package;
An audio area comprising the audio packs ;
A management information area of the audio area , the number of quantization bits and the sampling frequency for each channel of the front channel group and the rear channel group of the digital audio signal recorded in the audio area; and A management information area ( ATSI) in which a common bit shift amount for the channels of the rear channel group and channel assignment information for specifying the assigned forward channel group and the channel of the rear channel group are recorded. )When,
An audio disc recorded with a predetermined format. A decoding device for decoding an audio signal recorded on an audio disk according to claim 1,
Chiyaneruguru the front of the digital audio signal recorded before Symbol management information area - Chiyaneruguru for flop and rear - the quantization bit number and a sampling frequency of each channel of up, Chiyaneruguru before Symbol backward - for channels of flops Based on the common bit shift amount and the channel assignment information for identifying the channels of the assigned forward channel group and the backward channel group, the forward channel group recorded in the audio pack is recorded. And means for decoding the digital audio signal of the channel of the rear channel group,
An audio signal decoding device.

Images