JP2018530080A - メディアセグメント識別効率向上のために探索索引を区分するためのシステムおよび方法 - Google Patents
メディアセグメント識別効率向上のために探索索引を区分するためのシステムおよび方法 Download PDFInfo
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Abstract
Description
本出願は、参照によりその開示全体が本明細書に組み入れられる、2015年7月16日に出願された米国仮特許出願第62/193351号の恩典を主張するものである。
[0121]本明細書では、最初にセクション1でPPLEB(Probabilistic Point Location in Equal Balls)アルゴリズムについて説明する。PPLEBアルゴリズムは、アルゴリズム1の第5行を効率的に行うために用いられる。この被疑点の探索を迅速に行える能力は、この方法の適用性にとって非常に重要である。後のセクション2では、第6行および第7行を行うための1つの可能な統計モデルについて説明する。説明するモデルは、このセットアップのための自然な選択である。またモデルをどのようにして非常に効率的に使用できるかも示す。
になるようにすべての点xを返す必要がある。
になるような点の集合は、幾何学的には、クエリxを取り囲む半径rのボール内に位置する(図28参照)。この関係をx、xに近い、またはx、およびxは近傍であるという。
である単純化されたシナリオを扱う。後者の条件の理由は後で明らかになる。最初に、xとyの間の角度に応じてxとyを分離するランダム関数u∈Uを定義する。
を単位球Sd−1から一様に選ばれたランダムベクトルとし、u(x)=sign(
)とする。Pru−U(u(x))≠u(y))=0x,y/πであることを検証することは容易である。さらに、
であるような円上の任意の点x、y、x’、y’について、0x’,y≦20x,yが達成される。pを定義して、以下の式が用いられる。
E[nft]≦n(1−2p)t≦1
→t≧log(1/n)/log(1−2p)
が必要であることに留意されたい。これはあまり高い成功確率のようには思われないであろう。確かに、1/
は1/2より著しく小さい。次のセクションでは、どのようにしてこの確率を1/2まで上げるかについて説明する。
をBh(x)≡{xi|h(xi)=h(x)}として定義する。維持されるデータ構造は、バケット関数のm=O(
)個のインスタンス[Bh1,…,Bhm]である。点xを探索すると、関数は
を返す。前セクションによれば、2つの望ましい結果が生じる。
とする。曲線パラメータを時間と呼ぶ。既知である経路上の点は任意の時点tiにおいて与えられ、すなわちn対の(ti,P(ti))が与えられる。粒子は経路をたどるが、その位置は図31に示すように異なる時点において与えられる。さらに、m対の(t’j,x(t’j))が与えられ、x(t’j)は時間t’jにおける粒子の位置である。
セクション2.2 時間割引ビニング
がある閾値を上回る場合のδの特定の値を出力することである。
Claims (22)
- 1または複数のプロセッサと、
前記1つまたは複数のプロセッサ上で実行されると、前記1つまたは複数のプロセッサに動作を行わせる命令を含む1つまたは複数の非一時的な機械可読記憶媒体であって、前記動作は、
関連付けられた既知のコンテンツ識別子を有する複数の既知のメディアコンテンツを受信する動作と、
前記複数の既知のメディアコンテンツを第1の索引と第2の索引とに区分する動作と、
前記第1の索引を1つまたは複数の第1のバケットに分離する動作であって、前記第1の索引は、前記第1の索引内の前記既知のメディアコンテンツと関連付けられている前記既知のコンテンツ識別子を用いて第1のバケットに分離される、前記第1の索引を1つまたは複数の第1のバケットに分離する前記動作と、
前記第2の索引を1つまたは複数の第2のバケットに分離する動作であって、前記第2の索引は、前記第2の索引内の前記既知のメディアコンテンツと関連付けられている前記既知のコンテンツ識別子を用いて第2のバケットに分離される、前記第2の索引を1つまたは複数の第2のバケットに分離する前記動作と、
メディアシステムによって表示されている未知のメディアコンテンツに対応する未知のコンテンツ識別子を受信する動作と、
前記未知のコンテンツ識別子を求めて前記第1のバケットと前記第2のバケットとを同時に探索する動作と、
前記第1のバケットまたは前記第2のバケットの中から既知のメディアコンテンツを選択する動作であって、前記選択された既知のメディアコンテンツは前記未知のコンテンツ識別子と関連付けられている、既知のメディアコンテンツを選択する前記動作と、
前記未知のメディアコンテンツを前記選択された既知のメディアコンテンツとして識別する動作と
を含む、前記1つまたは複数の非一時的な機械可読記憶媒体と
を含む、システム。 - 前記複数の既知のメディアコンテンツは、前記既知のメディアコンテンツのパラメータを用いて前記第1の索引と前記第2の索引とに区分される、請求項1に記載のシステム。
- 前記動作は、
前記選択された既知のメディアコンテンツと関連付けられたコンテキスト的ターゲットデータを取得する動作と、
前記コンテキスト的ターゲットデータを表示のために前記メディアシステムに送信する動作と
をさらに含む、請求項1に記載のシステム。 - 前記未知のコンテンツ識別子は、前記未知のメディアコンテンツと関連付けられたメタデータを含む、請求項1に記載のシステム。
- 前記未知のコンテンツ識別子は、前記未知のメディアコンテンツと関連付けられた画素データを含む、請求項1に記載のシステム。
- 前記未知のコンテンツ識別子は、前記未知のメディアコンテンツと関連付けられた音声データを含む、請求項1に記載のシステム。
- 前記未知のコンテンツ識別子を求めて前記第1のバケットと前記第2のバケットとを探索する前記動作は、前記第1のバケット内の前記既知のメディアコンテンツと前記第2のバケット内の前記既知のメディアコンテンツとに音声認識技術を適用する動作を含む、請求項6に記載のシステム。
- 前記動作は、
前記未知のコンテンツ識別子を用いて前記選択された既知のメディアコンテンツ内のオフセット時間を決定する動作であって、前記オフセット時間は前記メディアシステムによって表示されている前記未知のメディアコンテンツに対応する、前記選択された既知のメディアコンテンツ内のオフセット時間を決定する前記動作
をさらに含む、請求項1に記載のシステム。 - 前記第1の索引を1つまたは複数の第1のバケットに分離する前記動作は、前記第1の索引内の前記既知のメディアコンテンツと関連付けられている前記既知のコンテンツ識別子をハッシュ化する動作を含み、前記第2の索引を1つまたは複数の第2のバケットに分離する前記動作は、前記第2の索引内の前記既知のメディアコンテンツと関連付けられている前記既知のコンテンツ識別子をハッシュ化する動作を含む、請求項1に記載のシステム。
- 前記動作は、
前記第1の索引内の前記既知のメディアコンテンツと関連付けられている前記ハッシュ化された既知のコンテンツ識別子を正規化する動作と、
前記第2の索引内の前記既知のメディアコンテンツと関連付けられている前記ハッシュ化された既知のコンテンツ識別子を正規化する動作と
をさらに含む、請求項9に記載のシステム。 - 前記動作は、
前記1つまたは複数の第1のバケットのうちの第1のバケット内の既知のメディアコンテンツの量が閾値を上回っていると判定する動作と、
前記第1のバケットを廃棄する動作と
をさらに含む、請求項1に記載のシステム。 - 関連付けられた既知のコンテンツ識別子を有する複数の既知のメディアコンテンツを受信するステップと、
前記複数の既知のメディアコンテンツを第1の索引と第2の索引とに区分するステップと、
前記第1の索引を1つまたは複数の第1のバケットに分離するステップであって、前記第1の索引は、前記第1の索引内の前記既知のメディアコンテンツと関連付けられている前記既知のコンテンツ識別子を用いて第1のバケットに分離される、前記第1の索引を1つまたは複数の第1のバケットに分離する前記ステップと、
前記第2の索引を1つまたは複数の第2のバケットに分離するステップであって、前記第2の索引は、前記第2の索引内の前記既知のメディアコンテンツと関連付けられている前記既知のコンテンツ識別子を用いて第2のバケットに分離される、前記第2の索引を1つまたは複数の第2のバケットに分離する前記ステップと、
メディアシステムによって表示されている未知のメディアコンテンツに対応する未知のコンテンツ識別子を受信するステップと、
前記未知のコンテンツ識別子を求めて前記第1のバケットと前記第2のバケットとを同時に探索するステップと、
前記第1のバケットまたは前記第2のバケットの中から既知のメディアコンテンツを選択するステップであって、前記選択された既知のメディアコンテンツは前記未知のコンテンツ識別子と関連付けられている、既知のメディアコンテンツを選択する前記ステップと、
前記未知のメディアコンテンツを前記選択された既知のメディアコンテンツとして識別するステップと
を含む、方法。 - 前記複数の既知のメディアコンテンツは、前記既知のメディアコンテンツのパラメータを用いて前記第1の索引と前記第2の索引とに区分される、請求項12に記載の方法。
- 前記選択された既知のメディアコンテンツと関連付けられたコンテキスト的ターゲットデータを取得するステップと、
前記コンテキスト的ターゲットデータを表示のために前記メディアシステムに送信するステップと
をさらに含む、請求項12に記載の方法。 - 前記未知のコンテンツ識別子は、前記未知のメディアコンテンツと関連付けられたメタデータを含む、請求項12に記載の方法。
- 前記未知のコンテンツ識別子は、前記未知のメディアコンテンツと関連付けられた画素データを含む、請求項12に記載の方法。
- 前記未知のコンテンツ識別子は、前記未知のメディアコンテンツと関連付けられた音声データを含む、請求項12に記載の方法。
- 前記未知のコンテンツ識別子を求めて前記第1のバケットと前記第2のバケットとを探索するステップは、前記第1のバケット内の前記既知のメディアコンテンツと前記第2のバケット内の前記既知のメディアコンテンツとに音声認識技術を適用するステップを含む、請求項17に記載の方法。
- 前記未知のコンテンツ識別子を用いて前記選択された既知のメディアコンテンツ内のオフセット時間を決定するステップであって、前記オフセット時間は前記メディアシステムによって表示されている前記未知のメディアコンテンツに対応する、前記選択された既知のメディアコンテンツ内のオフセット時間を決定する前記ステップ
をさらに含む、請求項12に記載の方法。 - 前記第1の索引を1つまたは複数の第1のバケットに分離する前記ステップは、前記第1の索引内の前記既知のメディアコンテンツと関連付けられている前記既知のコンテンツ識別子をハッシュ化するステップを含み、前記第2の索引を1つまたは複数の第2のバケットに分離する前記ステップは、前記第2の索引内の前記既知のメディアコンテンツと関連付けられている前記既知のコンテンツ識別子をハッシュ化するステップを含む、請求項12に記載の方法。
- 前記第1の索引内の前記既知のメディアコンテンツと関連付けられている前記ハッシュ化された既知のコンテンツ識別子を正規化するステップと、
前記第2の索引内の前記既知のメディアコンテンツと関連付けられている前記ハッシュ化された既知のコンテンツ識別子を正規化するステップと
をさらに含む、請求項20に記載の方法。 - 前記1つまたは複数の第1のバケットのうちの第1のバケット内の既知のメディアコンテンツの量が閾値を上回っていると判定するステップと、
前記第1のバケットを廃棄するステップと
をさらに含む、請求項12に記載の方法。
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CA2992519C (en) | 2024-04-02 |
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