JP6383896B1 - 移動マイクを用いた空間平均化ルームオーディオキャリブレーションのためのハイブリッドテストトーン - Google Patents
移動マイクを用いた空間平均化ルームオーディオキャリブレーションのためのハイブリッドテストトーン Download PDFInfo
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Abstract
Description
本発明の一態様によれば、方法が提供される。この方法は、再生デバイスの1つ又は複数のスピーカによって、キャリブレーション周波数範囲をカバーする周期的キャリブレーションサウンドを放出するステップを含む。周期的キャリブレーションサウンドは、キャリブレーション周波数範囲の最小値と第1の閾値周波数との間の周波数でノイズを含む第1の成分と、第2の閾値周波数とキャリブレーション周波数範囲の最大値との間の周波数でスイープする第2の成分とを含む。
図1は、本明細書で開示されている1つ又は複数の実施形態で実施可能又は実装可能なメディア再生システム100の例示的な構成を示す。図示されるように、メディア再生システム100は、複数の部屋および空間、例えば、主寝室、オフィス、ダイニングルーム、およびリビングルームを有する例示的なホーム環境と関連付けられている。図1の例に示されるように、メディア再生システム100は、再生デバイス102〜124、制御デバイス126および128、有線又は無線のネットワークルータ130を含む。
図2は、図1のメディア再生システム100の再生デバイス102〜124の1つ又は複数を構成する例示的な再生デバイス200の機能ブロック図を示す。再生デバイス200は、プロセッサ202、ソフトウェアコンポーネント204、メモリ206、オーディオ処理コンポーネント208、オーディオアンプ210、スピーカ212、およびネットワークインタフェース214を含んでもよい。ネットワークインタフェース214は、無線インタフェース216および有線インタフェース218を含む。ある場合では、再生デバイス200は、スピーカ212を含まないが、再生デバイス200を外部スピーカに接続するためのスピーカインタフェースを含んでいてもよい。別の場合では、再生デバイス200は、スピーカ212もオーディオアンプ210も含まないが、再生デバイス200を外部オーディオアンプ又はオーディオビジュアルレシーバーに接続するためのオーディオインタフェースを含んでもよい。
図1のメディア再生システムに戻って、環境は、1つ又は複数の再生ゾーンを有しており、それぞれの再生ゾーンは1つ又は複数の再生デバイスを含んでいる。メディア再生システム100は、1つ又は複数の再生ゾーンで形成されており、後で1つ又は複数のゾーンが追加又は削除して、図1に示す例示的な構成としてもよい。それぞれのゾーンは、異なる部屋又は空間、例えば、オフィス、浴室、主寝室、寝室、キッチン、ダイニングルーム、リビングルーム、および/又はバルコニーに基づく名前が与えられてもよい。ある場合では、単一の再生ゾーンは複数の部屋又は空間を含んでいてもよい。別の場合では、単一の部屋又は空間は、複数の再生ゾーンを含んでいてもよい。
図3は、メディア再生システム100の制御デバイス126と128とうちの一方又は両方を構成する例示的な制御デバイス300の機能ブロック図を示す。制御デバイス300は、コントローラ300とも称される。図示されるように、制御デバイス300は、プロセッサ302、メモリ304、ネットワークインタフェース306、およびユーザインタフェース308を含んでもよい。ある例では、制御デバイス300は、メディア再生システム100専用の制御デバイスであってもよい。別の例では、制御デバイス300は、メディア再生システムコントローラアプリケーションソフトウェアをインストールされたネットワークデバイス、例えば、iPhone(登録商標)、iPad(登録商標)、又は任意の他のスマートフォン、タブレットあるいはネットワークデバイス(例えば、PC又はMac(登録商標)などのネットワークコンピュータ)であってもよい。
前回図示したように、ゾーン又はゾーングループ内の1つ又は複数の再生デバイスは、再生するオーディオコンテンツを、(例えば、オーディオコンテンツの対応するURI又はURLに基づいて、)複数の入手可能なオーディオコンテンツソースから取り出すように構成されていてもよい。ある例では、オーディオコンテンツは、再生デバイスによって、対応するオーディオコンテンツソース(例えば、ライン−イン接続)から直接取り出されてもよい。別の例では、オーディオコンテンツは、1つ又は複数の他の再生デバイス若しくはネットワークデバイスを介してネットワーク上の再生デバイスに提供されてもよい。
上述したように、本明細書で説明する実施形態は、1つ又は複数の再生デバイスのキャリブレーションを促進することができる。図5は、再生デバイスにハイブリッドキャリブレーションサウンドを再生させる例示的な実施例500を示す。
実施例500は、少なくとも1つの再生デバイスのキャリブレーションを開始するトリガ条件を検出するステップを含む(ブロック502)。例えば、メディア再生システム100の制御デバイス126などの制御デバイスは、制御デバイス126に再生デバイス(例えば、再生デバイス102〜124のうちの1つ)のキャリブレーションを開始させるトリガ条件を検出することができる。あるいは、メディア再生システムの再生デバイスは、そのようなトリガ条件を検出してもよい(おそらく、そのトリガ条件のインジケーションを制御デバイスに中継する)。上述したように、再生デバイスのキャリブレーションには、所定の環境におけるスピーカの音響特性を改善しようとして、再生デバイスのスピーカ(すなわち、チャネル)の1つ又は複数の音響パラメータを調整するステップが含まれてもよい。
図5に戻ると、ブロック504において、実施例500は、少なくとも1つの再生デバイスにキャリブレーションサウンドを放出するように命令するコマンドを送信するステップを含む。例えば、メディア再生システム100の制御デバイス126などの制御デバイスは、再生デバイス(例えば、再生デバイス102〜124のうちの1つ)にキャリブレーションサウンドを放出するようにするコマンドを送信する。制御デバイスは、ネットワークインタフェース(例えば、有線又は無線のネットワークインタフェース)を介してコマンドを送信することができる。再生デバイスは、おそらくネットワークインタフェースを介してそのようなコマンドを受信し、それに応答してキャリブレーションサウンドを放出することができる。
図5に示すように、実施例500は、放出されたキャリブレーションサウンドを検出するステップを含む(ブロック506)。例えば、メディア再生システム100の制御デバイス126などの制御デバイスは、放出されたキャリブレーションサウンドの少なくとも一部をマイクを介して検出する。マイクがキャリブレーション環境全体にわたって動いていると仮定すると、制御デバイスは、当該環境内の異なる複数の物理的位置でキャリブレーションサウンドの反復を検出することができるため、環境全体をより良く理解することができる。
上述したように、本明細書で説明する実施形態は、複数の再生デバイスに一連のキャリブレーションサウンドを放出させることによって、複数の再生デバイスのキャリブレーションを容易にすることができる。図14は、複数の再生デバイスにキャリブレーションサウンドを連続して放出させる実施例1400を示す。
実施例1400は、複数の再生チャネルのキャリブレーションを開始するトリガ条件を検出するステップを含む(ブロック1402)。例えば、図1に示す制御デバイス126などの制御デバイスは、制御デバイス126に2つ以上の再生チャネル(例えば、再生デバイス102〜124のうちの1つの再生デバイスにおける2つ以上のスピーカ、あるいは、再生デバイス102〜124のうちの2つ以上の再生デバイス)のキャリブレーションを開始させるトリガ条件を検出する。あるいは、メディア再生システム(例えば、メディア再生システム100)の再生デバイスは、そのようなトリガ条件を検出してもよい(さらに、そのトリガ条件の指示を制御デバイスに中継してもよい)。複数の再生デバイスのキャリブレーションは、複数の再生デバイスがそれぞれのシーケンスに従ってキャリブレーションサウンドを放出するステップを含んでもよい。これらの放出されたキャリブレーションサウンドを検出した後、検出されたキャリブレーションサウンドを分析して、キャリブレーション環境内のスピーカの音響特性を改善するために、再生デバイスのスピーカに関する1つ又は複数の音響パラメータのそれぞれをどのように調整できるかを決定する。
図14を参照すると、実施例1400は、複数の再生デバイスにそれぞれのキャリブレーションサウンドを放出するように命令するコマンドを送信するステップを含む(ブロック1404)。例えば、メディア再生システム100の制御デバイス126などの制御デバイスが、2つ以上の再生デバイス(例えば、再生デバイス102〜124のうちの2つ以上)にキャリブレーションサウンドを放出させるそれぞれのコマンドを送信する。制御デバイスは、ネットワークインタフェース(例えば、有線又は無線のネットワークインタフェース)を介してコマンドを送信する。このようなコマンドを受信することに応じて、再生デバイスのそれぞれは、キャリブレーションサウンドを放出する。
図14において、実施例1400は、放出されたキャリブレーションサウンドを検出するステップを含む(ブロック1406)。例えば、メディア再生システム100の制御デバイス126などの制御デバイスは、発せられたキャリブレーションサウンドの少なくとも一部を、マイクを介して検出する。マイクがキャリブレーション環境全体にわたって動いていると仮定すると、制御デバイスは、環境内の異なる物理的位置でキャリブレーションサウンドの反復を検出することができる。
上述のように、本明細書で説明する実施形態は、1つ又は複数の再生デバイスのキャリブレーションを容易にすることができる。図16は、例示的な実施形態による、再生デバイスがハイブリッドキャリブレーションサウンドを放出することに関与する実施例1600を示す。
実施例1600は、キャリブレーションサウンドを放出するように再生デバイスに命令するコマンドを受信するステップを含む(ブロック1602)。例えば、再生デバイス102〜124のうちの1つなどの再生デバイスは、当該再生デバイスにキャリブレーションサウンドを放出するように命令するコマンドを受信する。上述のように、そのようなコマンドは、制御デバイス(例えば、メディア再生システム100の制御デバイス126又は制御デバイス128)から送信されてもよい。再生デバイスは、ネットワークインタフェース(例えば、有線又は無線のネットワークインタフェース)を介してコマンドを受信することができる。
図16をさらに参照すると、実施例1600は、キャリブレーションサウンドを放出するステップを含む(ブロック1604)。例えば、再生デバイス(例えば、再生デバイス102〜124のうちの1つ)は、再生デバイスにキャリブレーションサウンドを放出させるコマンドの受信に応じて、キャリブレーションサウンドを放出する。上述のように、そのようなコマンドは、おそらく特定のシーケンスに従って、特定の特性を有する特定のキャリブレーションサウンドを放出するように再生デバイスに指示することができる。
本明細書は、様々な例示のシステム、方法、装置、および製品などを開示しており、それらは、他のコンポーネントの中で、ハードウェア上で実行されるファームウェアおよび/又はソフトウェアを含む。そのような例は、単なる例示であり、限定されるものとみなすべきではないと理解される。例えば、これらのファームウェア、ハードウェア、および/又はソフトウェアの態様又はコンポーネントのいくつか又はすべてが、専らハードウェアに、専らソフトウェアに、専らファームウェアに、又はハードウェア、ソフトウェア、および/又はファームウェアの任意の組み合わせを実施することができることが意図されている。したがって、提供されているそれらの例は、それらのシステム、方法、装置、および/又は生産物を実施する唯一の方法ではない。
Claims (15)
- 再生デバイスの1つ又は複数のスピーカによって、キャリブレーション周波数範囲をカバーする周期的キャリブレーションサウンドを放出するステップを含む方法であって、
周期的キャリブレーションサウンドは、
キャリブレーション周波数範囲の最小値と第1の閾値周波数との間の周波数のノイズを含む第1の成分と、
第2の閾値周波数とキャリブレーション周波数範囲の最大値との間の周波数でスイープする第2の成分とを含む、方法。 - さらに、
キャリブレーションサウンドを放出するように再生デバイスに指示するコマンドを制御デバイスから受信することに応答して、1つ又は複数のスピーカに周期的キャリブレーションサウンドを放出させるステップを含む、請求項1に記載の方法。 - 第2の閾値周波数は、第1の閾値周波数よりも低い周波数であり、第2の閾値周波数と第1の閾値周波数との間の周波数を含む移行周波数範囲において第1の成分と第2の成分が重複する、請求項1又は2に記載の方法。
- 第1の閾値周波数は、第2の閾値周波数と同じ閾値周波数である、請求項1又は2に記載の方法。
- さらに、
1つ又は複数のスピーカに、キャリブレーション周波数範囲の最小値と第1の閾値周波数との間の周波数を少なくともカバーするノイズを生成させるステップ、
1つ又は複数のスピーカに、第2の閾値周波数とキャリブレーション周波数範囲の最大値との間の周波数を少なくともカバーするスイープサインを生成させるステップ、
1つ又は複数のスピーカに、クロスオーバフィルタ関数を適用することによって、スイープサインとノイズを結合して周期的キャリブレーションサウンドを作らせるステップ、ここで、クロスオーバフィルタ関数は、第1の閾値周波数よりも低い周波数を含むノイズの一部と、第2の閾値周波数よりも高い周波数を含むスイープサインの一部とを結合するものである、
を含む、請求項1から4のいずれか1つに記載の方法。 - さらに、
周期的キャリブレーションサウンドを制御デバイスから受信するステップを含む、請求項2又は請求項2と前述の任意の請求項との組合せに記載の方法。 - 周期的キャリブレーションサウンドを放出するステップは、2〜4ヘルツの範囲内の周波数で周期的キャリブレーションサウンドを周期的に放出するステップを含む、請求項1から6のいずれか1つに記載の方法。
- 第2の成分は、キャリブレーション周波数範囲の最大値から第2の閾値周波数までの周波数を降下することによって当該周波数をスイープする、請求項1から7のいずれか1つに記載の方法。
- 周期的キャリブレーションサウンドを放出するステップは、周期的キャリブレーションサウンドを約0.375秒ごとに周期的に放出するステップを含む、請求項1から8のいずれか1つに記載の方法。
- 周期的キャリブレーションサウンドを放出するステップは、周期的キャリブレーションサウンドを0.25秒から0.5秒の範囲内の周期で周期的に放出するステップを含む、請求項1から9のいずれか1つに記載の方法。
- 1つ又は複数のスピーカと、
請求項1から10のいずれか1つに記載の方法を実行するように構成された制御システムと、
を備える、再生デバイス。 - さらに、
制御デバイスからのコマンドおよび/又は周期的キャリブレーションサウンドのうちの少なくとも1つを制御デバイスから受信するように構成されたネットワークインタフェースを備える、請求項11に記載の再生デバイス。 - 1つ又は複数のプロセッサによって実行可能な命令を記憶した非一時的コンピュータ読取り可能媒体であって、
当該命令は制御デバイスに対して、
請求項2あるいは請求項2と請求項3から10のいずれか1つとの組合せに記載の方法を実行するステップ、
選択されると少なくとも1つの再生デバイスのキャリブレーションを開始するように選択可能な制御部が選択されたことを示す入力データを検出するステップ、
入力データの検出に応じて、少なくとも1つの再生デバイスに対して、周期的キャリブレーションサウンドを放出するように指示するコマンドを送信するステップ、
を実行させる、非一時的コンピュータ読取り可能媒体。 - 命令はさらに、
制御デバイスに対して、
入力データの検出に応じて、ネットワークインタフェースを介して再生デバイスにキャリブレーションサウンドを送信するステップを実行させる、請求項13に記載の非一時的コンピュータ読取り可能媒体。 - 請求項13又は14に記載の非一時的コンピュータ読取り可能媒体を含む制御デバイス。
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