JP5337266B2 - マルチメディアコンテンツの安全な転送およびプレイバックのための方法および装置 - Google Patents
マルチメディアコンテンツの安全な転送およびプレイバックのための方法および装置 Download PDFInfo
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- JP5337266B2 JP5337266B2 JP2012059387A JP2012059387A JP5337266B2 JP 5337266 B2 JP5337266 B2 JP 5337266B2 JP 2012059387 A JP2012059387 A JP 2012059387A JP 2012059387 A JP2012059387 A JP 2012059387A JP 5337266 B2 JP5337266 B2 JP 5337266B2
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Description
1.0 全般的な概要
2.0 構造的概要
3.0 マルチメディアコンテンツの安全な転送およびプレイバックを提供するためのアプローチ
3.1 DVRおよびPC間の安全な接続の確立
3.2 DVRおよびPC間のマルチメディアコンテンツの転送
3.3 内部PESのMPEGへの変換の変換
4.0 実施メカニズ‐ハードウェア概要
5.0 拡張および代替
前述の背景技術において確認された必要性、および以下の記載に対して明らかになるであろう他の必要性および目的は、1つの観点において、マルチメディアコンテンツの安全な転送およびプレイバックを提供するための方法を有する、本発明において実現される。DVRユーザは、コンテンツを、DVRからPCへ、さらにハンドヘルドデバイスへ安全に転送することができる手段が提供される。DVRは、発見動作(discovery operation)を実行することによりLAN内のPCおよび他のDVRを識別する能力を備えている。発見を通じて、DVRは、LAN上のどのデバイスが、DVRからコンテンツを共用および/または取り出す許可を得ているかを、判定することができる。LAN上のPCで、メディア・アプリケーション・プログラムは、DVRと通信し、かつDVRからPCへのコンテンツの転送を開始するために使用される。メディア・アプリケーション・プログラムが、PC上にロードされると、それは、ユーザから特定のDVRを識別するための情報を要求する。一実施例の場合、この情報は、DVRと関連付けられたメディア・アクセス鍵の形とすることができる。ユーザがメディア・アクセス鍵をメディア・アプリケーション・プログラムに与えると、プログラムは、LAN上の関連付けられたDVRを見つけ、かつ接続要求をDVRへ送る。
図1Aを参照すると、一実施例により、DVRおよびPC間でコンテンツを共用するための通信システムが、示される。通信システムは、DVR 102A、102Bおよび104を有する。DVR102A、102Bおよび104は、イーサネット(登録商標)または無線通信ポートのような任意の適切な通信インタフェースを通して、ローカルエリアネットワーク(LAN) 105へ通信可能に結合される。PC 101は、デスクトップまたはラップトップコンピュータのようなパーソナルコンピューティングデバイスであることが可能であり、かつ任意の適切なインタフェースを通して、LAN 105へ通信可能に結合される。ポータブルデバイス 101Aは、PCまたはLAN 105へ通信可能に結合されても良い。一実施例の場合、ポータブルデバイス 101Aは、マルチメディアコンテンツを表示するために、ハンドヘルドコンピューティングデバイス、携帯電話、ポータブルメディアプレイヤ等であることが可能である。LAN 105およびインターネット107を通して、 DVR 102Aおよび102Bは、サービスプロバイダ106Aおよびコンテンツサーバ 106Bと通信することができる。
3.1 DVRおよびPC間での安全な接続の確立
各 DVR 102A、102Bは、LAN上の他のデバイスを見つけかつ安全な接続確立するために、発見ステージを通って実行する。発見は、任意の適切な発見プロトコル(例えば、アップル・コンピュータによる Rendezvous)を使用して、実行可能であり、および指定された時間間隔でまたはユーザの要求で自動的に実行するようにセット可能である。発見の間、DVR 102Aは、LAN 105上に隣接したDVR 102B、104 およびPC 101、110を見つけ、かつ許可された共用デバイスとして1つ以上のデバイスを識別することができる。例えば、DVR 102Aは、DVR 102Bを許可された共用デバイスとして識別することができ、さらにDVR 104を無許可のデバイスとして認識する。従って、DVR 104によるDVR 102Aのコンテンツを要求する任意の試みは、を拒否されるであろう。LAN 105にアタッチされた、どのデバイスが許可された共用デバイスであるかを判定するために、DVR 102Aは、サービスプロバイダ 106Aにより提供されたデジタル共用証明書を調べることができる。
一旦、PC 101とDVR 102Aが接続を確立した場合、デバイス間のマルチメディアコンテンツの安全な転送は、可能である。コンテンツの安全な転送は、DVR 102AからPC 101へ、またはPC 101からDVR 102Aへ確立可能である。
一実施例の場合、DVR 102Aは、プレイバックのために、内部PESフォーマットで記録されたマルチメディアコンテンツを格納する。しかしながら、PC 101がマルチメディアコンテンツを処理するために、内部PESフォーマットは、PC読み取り可能な形に変換されなければならない。一実施例の場合、このようなPC読み取り可能なフォーマットは、MPEGプログラムストリームである。図6を参照すると、マルチメディアコンテンツの内部PES表現は、マルチメディアコンテンツのビデオイベント(V)および音声イベント(A)を含む、PESバッファ 604により具体化される。その上、他の実施例の場合、PESバッファ 604は、プライベートデータイベントのような他のイベントを含むことができる。内部PESバッファ 604内のデータをMPEGプログラムストリーム 400に変換するプロセスを始めるために、DVR 102Aは、音声バッファ 612とビデオバッファ 614を割り当てる。
図7は、本発明の実施例が実施可能なコンピュータシステム 700を例示するブロック図である。コンピュータシステム 700は、バス 702または情報を通信するための他の通信メカニズム、および情報を処理するためのバス 702と結合されたプロセッサー704を含む。コンピュータシステム 700は、また、情報およびプロセッサー 704により実行されるべき命令を格納するために、バス 702に結合された、読取り書き込み記憶装置 (RAM) または他の動的記憶デバイスのような、主メモリ 706を含む。主メモリ 706は、また、一時的数値変数またはプロセッサー 704により実行されるべき命令の実行中の他の中間情報を格納するために、使用可能である。コンピュータシステム 700は、さらに、読取専用記憶装置(ROM) 708、または静的情報およびプロセッサー 704に対する命令を格納するために、バス 702に結合される他の静的記憶デバイスを含む。磁気ディスクまたは光ディスクのような記憶デバイス 710が、情報および命令を格納するために、提供されかつバス 702に結合される。
上記明細書において、本発明は、特定の実施態様を参照して説明された。しかしながら、様々な修正および変更が、本発明の真の精神および範囲から逸脱することなく、行うことができることは明らかであろう。従って、本明細書および図面は、制限的な意味ではなく例示的な意味で考えられるべきである。
106B コンテンツサーバ
107 インターネット
101A ポータブルデバイス
102A DVR
102B DVR
105 ローカルエリアネットワーク
190 ホームネットワーク
Claims (21)
- サーバが、第一のデバイスでアクセス可能なマルチメディアコンテンツのリスティングにアクセスするステップと、
前記サーバが、遠隔のデバイスの遠隔のアプリケーションに、前記マルチメディアコンテンツの前記リスティングの少なくとも一部を提供するステップと、
前記サーバが、前記遠隔のデバイスから、前記マルチメディアコンテンツの前記リスティングの前記一部からの特定のマルチメディアコンテンツの選択を受信するステップと、
前記特定のマルチメディアコンテンツを第二のデバイスに転送する要求を前記第一のデバイスに送るよう、前記サーバが、前記第二のデバイスに命令するステップとを、
備える方法。 - 前記第一のデバイスが、ビデオ記録デバイスであり、かつ前記第二のデバイスが、前記サーバにより提供されるメディアアプリケーションを実行するコンピューティングデバイスである、請求項1に記載の方法。
- 前記第一のデバイスおよび前記第二のデバイスが、ローカルエリアネットワークに属し、かつ前記遠隔のデバイスが、前記ローカルエリアネットワークに属さない、請求項1に記載の方法。
- 前記特定のマルチメディアコンテンツが、前記第一のデバイスにより記録されている、請求項1に記載の方法。
- 前記特定のマルチメディアコンテンツが、前記第一のデバイスによりダウンロードされている、請求項1に記載の方法。
- 前記サーバが、前記遠隔のデバイスから前記特定のマルチメディアコンテンツの前記選択を受信する際に、前記特定のマルティメディアコンテンツが、前記第一のデバイスに格納されていなく、さらに、
前記第一のデバイスが、前記特定のマルチメディアコンテンツを記録またはダウンロードすることにより前記特定のマルチメディアコンテンツを既に取得しているか否かを、前記第一のデバイスが判定することをモニタするステップと、
前記第一のデバイスが、既に前記特定のマルチメディアコンテンツを取得しているとの判定に基づいて、前記第二のデバイスは、前記第一のデバイスが、前記特定のマルチメディアコンテンツを前記第二のデバイスに転送することを、要求するステップとを、
備える、請求項1に記載の方法。 - 前記第二のデバイスが、前記特定のマルチメディアコンテンツを前記第二のデバイスに転送することを要求することに応答して、前記第一のデバイスが、前記特定のマルチメディアコンテンツを前記第二のデバイスでのプレイバックに適したフォーマットに変換する、請求項1に記載の方法。
- 前記マルチメディアコンテンツの前記リスティングが、前記第一のデバイスを含めて複数のデバイスでアクセス可能なマルチメディアコンテンツのリスティングであり、さらに、
前記選択を受信した後、前記特定のマルチメディアコンテンツが、前記複数のデバイスの何れかから前記第二のデバイスに転送可能であるか否かを、前記サーバが判定するステップと、
前記特定のマルチメディアコンテンツが前記第一のデバイスから前記第二のデバイスに転送可能であると前記サーバが判定することに応答して、前記第一のデバイスが、前記特定のマルチメディアコンテンツを転送することを要求することを、前記サーバが、前記第二のデバイスに命令するステップとを、
備える請求項1に記載の方法。 - 前記特定のマルチメディアコンテンツが、前記第一のデバイスから前記第二のデバイスに転送可能であるか否かを判定し、かつ前記特定のマルチメディアコンテンツが、前記第一のデバイスから前記第二のデバイスに転送可能でないとの判定に応答して、前記特定のマルチメディアコンテンツを記録またはダウンロードするよう前記第一のデバイスに命令するステップを、さらに、備える請求項1に記載の方法。
- 前記第一のデバイスから前記特定のマルチメディアコンテンツを受信することに応答して、前記特定のマルチメディアコンテンツを第三のデバイスに転送することを、前記サーバが、前記第二のデバイスに命令するステップを、さらに、備える請求項1に記載の方法。
- 前記サーバが、サービスプロバイダにより作動される請求項1に記載の方法。
- サーバが、第一のデバイスでアクセス可能なマルチメディアコンテンツのリスティングにアクセスするステップと、
前記サーバが、遠隔のデバイスの遠隔のアプリケーションに、前記マルチメディアコンテンツの前記リスティングの少なくとも一部を提供するステップと、
前記サーバが、前記遠隔のデバイスから、前記マルチメディアコンテンツの前記リスティングの前記一部からの特定のマルチメディアコンテンツの選択を受信するステップと、
前記特定のマルチメディアコンテンツを第二のデバイスに転送するよう、前記サーバが前記第一のデバイスに命令するステップとを、
備える方法。 - 前記第一のデバイスが、ビデオ記録デバイスであり、かつ前記第二のデバイスが、前記サーバにより提供されるメディアアプリケーションを実行するコンピューティングデバイスである、請求項12に記載の方法。
- 前記第一のデバイスおよび前記第二のデバイスが、ローカルエリアネットワークに属し、かつ前記遠隔のデバイスが、前記ローカルエリアネットワークに属さない、請求項12に記載の方法。
- 前記特定のマルチメディアコンテンツが、前記第一のデバイスにより記録されている、請求項12に記載の方法。
- 前記特定のマルチメディアコンテンツが、前記第一のデバイスによりダウンロードされている、請求項12に記載の方法。
- 前記サーバが、前記第二のデバイスに前記特定のマルチメディアコンテンツを要求するよう命令する際に、前記特定のマルティメディアコンテンツが、前記第一のデバイスに格納されていなく、
前記第一のデバイスが、前記特定のマルチメディアコンテンツを記録またはダウンロードすることにより前記特定のマルチメディアコンテンツを取得するステップと、
前記特定のマルチメディアコンテンツを取得したことに基づいて、前記第一のデバイスが、前記特定のマルチメディアコンテンツを前記第二のデバイスに転送するステップとを、
備える、請求項12に記載の方法。 - 前記特定のマルチメディアコンテンツを転送することを、前記サーバが前記第一のデバイスに命令することに応答して、前記第一のデバイスが、前記特定のマルチメディアコンテンツを前記第二のデバイスでのプレイバックに適したフォーマットに変換する、請求項
12に記載の方法。 - 前記サーバが、サービスプロバイダにより作動される請求項12に記載の方法。
- 1個以上のコンピューティングデバイスに実行させるときに、請求項1〜19に記載したいずれかの方法を実行させる命令を格納する1個以上のコンピュータ可読格納媒体。
- 第一のデバイスと、
第二のデバイスと、
サーバと、
遠隔のデバイスと、
前記サーバ、第一のデバイス、第二のデバイスおよび遠隔のデバイスに結合されているコンピュータネットワークとを、
備え、
前記サーバが、請求項1〜19に記載の何れかの方法を実行するように構成されている、システム。
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