JP4940410B2 - ユーザ・ツー・ユーザレコメンダ - Google Patents
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Description
グル(Guru):MaとRb(RaとMb)が十分な共通部分を有する場合、BをAの「グル」とみなす。
ピア−グル(Peer-Guru):ピアの条件にグルの条件が加わった場合、BをAの「ピア−グル」とみなす。
フォロワー(Follower):RaとMb(MaとRb)が十分な共通部分を有する場合、BをAの「フォロワー」とみなす。
1.ユーザコミュニティおよびアイテムレコメンダが存在し、そのアイテムレコメンダからコミュニティ中の各ユーザのユーザプロフィールを抽出することができる。この情報は1つ以上のデータソースによって提供することができる。
2.モデルのデータおよびオペレーションを構築し、データソースからデータを収集するユーザレコメンダが存在する。
1.ユーザデータをクラスタ化(clusterized)してターゲットユーザと適切なクラスタ(集団)とを比較することができる。
2.一定数のユーザのサブセットをユーザコミュニティから選択することができる。このユーザのサブセットは「推奨可能ユーザ(Recommendable Users)」と呼ぶことができ、ターゲットユーザとこの一定サイズのサブセットとを比較することができる。推奨可能ユーザはいくつかの手順によって選択することができ、この手順によってシステムがコミュニティ中の最も興味深いユーザを推奨することが可能になる。
1.音楽セットのサイズは、MukをセットMuにおけるアイテムkの関連値とする場合、以下のように表すことができる。
特定のメトリクスのセットを計算することによって、推奨ユーザのセットをターゲットユーザに対して返すことができる。必要条件(Requirement)は、どのタイプのユーザを推奨するか、またどんなメトリクスを検討するかを特定することができる。この関数の一般的アルゴリズム(general algorithm)は以下のとおりである。
1.TUをターゲットユーザ(Target User)、RUSを推奨可能ユーザセット(Recommendable Users Set)、REQを要求の必要条件(Requirement of request)とする。
2.RUS中の各ユーザUに対してREQに従って必要なメトリクス(TU,U)を計算し、その結果をRUS中の比較対象のユーザUの結果とともに保存する。
3.リストの最初にREQに応じたベストユーザがくるように、比較結果に従ってRUSをソートする。
4.RUSのサブリストに戻り、最初から開始する。
ユーザ1のユーザ2に対する全てのメトリクスを計算することによって、全てのメトリック値(metric values)でいくつかの計算を実行する関数を計算することにより浮動数(floating number)を返すことができ、「ユーザ2はユーザ1にとってどれだけ関連性があるか」という質問に返答する。この関数は、例えばADG空間におけるベクトルの長さを計算することができる。
1.Reach API(Reachアプリケーションプログラミングインタフェース):各ユーザのプレイカウント(playcount)データを返す。いくつかの実施形態では、このデータから音楽セットを推定することが可能である。
2.UMAレコメンダ(ユニファイドメモリアーキテクチャレコメンダ):アイテムセットの推奨アイテムを返す。いくつかの実施形態では、例えばユーザプロフィールのミュージックセットを入力として使用してこのデータから音楽セットを推定することが可能であり、その結果上述したユーザプロフィールの推奨セットを得ることができる。
3.Kill Bill API(Kill Billアプリケーションプログラミングインタフェース):ユーザに関するいくつかの追加情報(例えば、通称名)を返す。
サーブレット・ビュー(Servlet View):サーブレットの要求/応答ロジックの全てが入っている場所。
レコメンダ・ビュー(Recommender View):シングルトンレコメンダ(singleton Recommender)によってメイン演算を実行する場所。多くの場合それらの演算をマネジャー(Manager)に委託する。
マネジャー・ビュー(Manager View):コアクラス(Core classes)を使用することによって全ての演算を実質的に実行する場所。
コア・ビュー(Core View):ジャバクラス(Java Classes)のセットによってモデルの基盤を確立する場所。
1.デバッグサーブレット(Debug Servlet)500がデバッグコマンドを処理する。例えば、action=statsのとき、レコメンダ530の内部メモリの統計データのプロットを実行する。
2.レコメンダサーブレット(Recommender Servlet)510が前述のモデル演算に従って推奨要求を処理する。
3.アップデートサーブレット(Update Servlet)520がユーザデータにおいてアップデートプロセスを実行する。
1.セマフォが開いている場合はセマフォを閉じ、そうでなければ待機。
2.結果がキャッシュの中にあるか。
3.キャッシュの中にある場合は、キャッシュから結果を取り出す。
4.キャッシュセマフォ(cache semaphore)を開く。
1.F:聴いている頻度
2.K:知識(ユーザがこのアーティストの曲をいくつ知っているか)
FおよびKの値は、「High(高)」もしくは「Low(低)」として分類することができる。したがって、特定のアーティストのリスナーは以下のように分類することができる。
Claims (10)
- 複数のユーザを含む定義されたコミュニティにおいて当該コミュニティ内の第1のユーザと関係がありそうと思われる個々のユーザを特定する方法であって、当該方法は、
前記コミュニティ内で第1のユーザを選択するステップと、
第1のメディアアイテムのセットと第1の推奨メディアアイテムのセットを含む前記第1のユーザのユーザプロフィールにアクセスするステップと、
前記ユーザコミュニティにおける複数の他のユーザを選択するステップと、
対応するメディアアイテムのセットと対応する推奨メディアアイテムのセットを含む前記複数の他のユーザのそれぞれに対するユーザプロフィールにアクセスするステップと、
前記第1のユーザのユーザプロフィールを前記コミュニティにおける前記複数の他のユーザのユーザプロフィールと比較するステップと、
前記複数の他のユーザのユーザプロフィールに基づいて、前記第1のユーザに関係がありそうと思われる前記複数の他のユーザの中から1または複数のユーザのセットを特定するステップと、を含むことを特徴とする前記方法。 - 前記メディアアイテムのセットは、それぞれ、複数のメディアデータアイテムを含む請求項1に記載の方法。
- 前記メディアデータアイテムは、それぞれ、少なくとも1つのデジタルミュージックトラック、デジタルビデオクリップまたはメタデータファイル、あるいは対応するミュージックトラックまたはビデオクリップを識別するリンクを含む請求項2に記載の方法。
- 前記第1のユーザプロフィールを比較するステップは、前記第1のユーザのメディアアイテムのセットを前記複数の他のユーザのメディアアイテムのセットと比較するステップと、前記第1のユーザ推奨メディアアイテムのセットを前記複数の他のユーザの推奨メディアアイテムのセットと比較するステップと、を含む請求項3に記載の方法。
- 前記第1のユーザのユーザプロフィールを前記複数の他のユーザのプロフィールと比較するステップは、当該他のユーザのユーザプロフィールのそれぞれに対して、
(a)前記第1のユーザのメディアアイテムのセットと前記複数の他のユーザのメディアアイテムのセットの共通部分を求めるステップと、
(b)前記第1のユーザのメディアアイテムのセットと前記複数の他のユーザの推奨メディアアイテムのセットの共通部分を求めるステップと、を含む請求項3に記載の方法。 - 前記第1のユーザのユーザプロフィールを前記複数の他のユーザのユーザプロフィールと比較するステップは、当該他のユーザのユーザプロフィールのそれぞれに対して、
(a)前記第1のユーザの推奨メディアアイテムのセットと前記複数の他のユーザのメディアアイテムのセットの共通部分を求めるステップと、
(b)前記第1のユーザの推奨メディアアイテムのセットと前記複数の他のユーザの推奨メディアアイテムのセットの共通部分を求めるステップと、を含む請求項5に記載の方法。 - 複数のユーザを含む定義されたコミュニティにおいて、第1のユーザに対する複数の個々のユーザの関係度を定量化する方法であって、当該方法は、
前記ユーザコミュニティにおいて第1のユーザを選択するステップと、
第1のメディアアイテムのセットと第1の推奨メディアアイテムのセットを含む前記第1のユーザのユーザプロフィールにアクセスするステップと、
対応するメディアアイテムのセットと対応する推奨メディアアイテのセットを含む前記複数の他のユーザのそれぞれに対するユーザプロフィールにアクセスするステップと、
前記第1のユーザのユーザプロフィールを前記コミュニティにおける複数の他のユーザのそれぞれのユーザプロフィールと比較するステップと、を有しており、
前記比較は、
(a)前記第1のユーザのメディアアイテムのセットと前記複数の他のユーザのそれぞれのメディアアイテムのセットの共通部分に基づいてアフィニティメトリックを求めるステップと、
(b)前記第1のユーザの推奨メディアアイテムのセットと前記複数の他のユーザのそれぞれのメディアアイテムのセットの共通部分に基づいてディスカバリメトリックを求めるステップと、
(c)前記第1のユーザのメディアアイテムのセットと前記複数の他のユーザのそれぞれの推奨メディアアイテムのセットとの共通部分に基づいてガイダンスメトリックを求めるステップと、を含むことを特徴とする前記方法。 - 前記複数の他のユーザのそれぞれの推奨メディアアイテムのセットは、対応するユーザによって使用される少なくとも1つの入力メディアアイテムに応じて、アイテムリコメンダプログラムによって生成される請求項7に記載の方法。
- さらに、前記複数のユーザのそれぞれのメディアアイテムのセットにおける各アイテムに対する関連値を求めるステップと、
前記関連値を標準化するステップと、
前記標準化された関連値に基づいて、前記複数のユーザのそれぞれのメディアアイテムのセットの中で、それらのメディアアイテムをランク付けするステップと、
前記アフィニティメトリック、ディスカバリメトリック及びガイダンスメトリックのうちの少なくとも1つを決めるために最も高くランク付けされたメディアアイテムを含むサブセットを用いるステップと、を含む請求項7に記載の方法。 - 前記メディアアイテム関連値を標準化するステップは、所定の関連度スケールに対してそれらの関連値を定量化することにより行われる請求項9に記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US75210205P | 2005-12-19 | 2005-12-19 | |
US60/752,102 | 2005-12-19 | ||
PCT/US2006/048330 WO2007075622A2 (en) | 2005-12-19 | 2006-12-19 | User-to-user recommender |
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JP2009520304A JP2009520304A (ja) | 2009-05-21 |
JP2009520304A5 JP2009520304A5 (ja) | 2010-02-04 |
JP4940410B2 true JP4940410B2 (ja) | 2012-05-30 |
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US (3) | US7962505B2 (ja) |
EP (2) | EP2437158A1 (ja) |
JP (1) | JP4940410B2 (ja) |
KR (1) | KR20080085142A (ja) |
CN (1) | CN101506796A (ja) |
BR (1) | BRPI0620084B1 (ja) |
WO (1) | WO2007075622A2 (ja) |
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JP2009520304A (ja) | 2009-05-21 |
US20070203790A1 (en) | 2007-08-30 |
BRPI0620084A2 (pt) | 2011-11-01 |
EP2437158A1 (en) | 2012-04-04 |
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US7962505B2 (en) | 2011-06-14 |
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US20130198172A1 (en) | 2013-08-01 |
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