JP5317223B2 - 信号を符号化および復号する方法および装置 - Google Patents
信号を符号化および復号する方法および装置 Download PDFInfo
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Description
本出願は、米国特許法第119条に基づいて、2007年5月16日付で米国に出願された仮特許出願第60/930683号、2007年5月17日付で米国に出願された仮特許出願第60/930591号、2007年6月20日付で米国に出願された仮特許出願60/936360号、さらに、2007年7月6日付で米国に出願された仮特許出願60/58581号の優先権を主張する。
G=(1 2) (28)
Claims (30)
- テレビジョン放送システムにおいて使用される、データ符号化器でデータを符号化する方法であって、該方法は、
前記データ符号化器の入力でデータを受信するステップであって、該受信したデータはパケットに配列される、前記ステップと、
第1のバイトコード符号化処理を使用して前記データを符号化するステップであって、該符号化されたデータはシステマティックな部分と非システマティックな部分を含み、該システマティックな部分は前記受信したデータのパケットの一部であり、前記非システマティックな部分は前記システマティックな部分、及び他のシステマティックな部分と非システマティックな部分に基づいて生成される前記ステップと、
前記符号化されたデータをインタリーブするステップと、
第2のバイトコード符号化処理を使用して前記インタリーブされたデータを符号化するステップであって、前記インタリーブされたデータの前記システマティックな部分と前記非システマティックな部分を符号化することを含む前記ステップと、を含み、
前記インタリーブするステップは、前記システマティックな部分と前記非システマティックな部分のサイズの整数倍であり、そして受信したデータのパケットサイズより小さいインタリーバ長を使用して行われる、前記方法。 - 前記第1のバイトコード符号化処理および前記第2のバイトコード符号化処理が前記データを補足するためのガロア体生成行列を使用する、請求項1に記載の方法。
- 前記生成行列は、ガロア体GF上で
(1 2)
のように定義される、請求項2に記載の方法。 - 前記生成行列が1/2レートの符号化レートを生成する、請求項3に記載の方法。
- 前記生成行列が2/3レートの符号化レートを生成する、請求項5に記載の方法。
- 前記第1のバイトコード符号化処理および前記第2のバイトコード符号化処理が相異なる符号化レートを使用する、請求項1に記載の方法。
- 前記受信するステップにおける前記データが、各々が187バイトのデータを含むパケットに配列される、請求項1に記載の方法。
- 前記符号化され、インタリーブされたデータをパンクチャするステップをさらに含む、請求項1に記載の方法。
- 前記パンクチャするステップは、前記符号化され、インタリーブされたデータからデータの一部を取り除くステップを含む、請求項9に記載の方法。
- 前記パンクチャするステップにより、パンクチャされたデータの各バイトのグループが形成され、前記グループにおけるバイトの数が26の倍数である、請求項10に記載の方法。
- 前記パンクチャするステップにより、パンクチャされたデータの各バイトのグループが形成され、前記グループにおけるバイトの数が24の倍数である、請求項10に記載の方法。
- 前記第1のバイトコード符号化処理を使用する符号化ステップは、前記受信されたデータの各バイトのグループを符号化するステップを含む、請求項1に記載の方法。
- 前記インタリーブするステップにおいて使用されるバイトの数は前記第1のバイトコード符号化処理によって出力される出力バイトの数と等しい、請求項13に記載の方法。
- 前記インタリーブは、ホワイト・ノイズ・レベルでのバイト・エラー・レートを低下させることに基づくように構成される、請求項1に記載の方法。
- 前記第1のバイトコード符号化処理および第2のバイトコード符号化処理がガロア体GF直列連結型ブロックコード処理に含まれる、請求項1に記載の方法。
- テレビジョン放送システムにおいて使用される装置において、
データを受信し、該受信したデータはパケットに配列され、第1のバイトコード符号化処理を使用して前記データを符号化し、該符号化されたデータはシステマティックな部分と非システマティックな部分を含み、前記システマティックな部分は前記受信したデータのパケットの一部であり、前記非システマティックな部分は前記システマティックな部分、及び他のシステマティックな部分と非システマティックな部分に基づいて生成される、第1の符号化器と、
前記第1の符号化器に結合されて前記第1の符号化器から前記符号化されたデータを受信し、前記データの順序を付け直し、前記システマティックな部分と前記非システマティックな部分のサイズの整数倍であり、そして受信したデータのパケットサイズより小さいインタリーバ長を使用する、インタリーバと、
前記インタリーバに結合されて前記順序を付け直されたデータを受信し、第2のバイトコード符号化処理を使用して前記順序を付け直されたデータを符号化し、前記インタリーブされたデータの前記システマティックな部分と前記非システマティックな部分を符号化する、第2の符号化器と、を含む前記装置。 - 前記インタリーバは、ホワイト・ノイズ・レベルでのバイト・エラー・レートを低下させることに基づいて前記データの順序を付け直す、請求項19に記載の装置。
- 前記第1の符号化器および前記第2の符号化器が前記データを補足するためのガロア体生成行列を使用する、請求項19に記載の装置。
- 前記第1の符号化器および前記第2の符号化器は、相異なる符号化レートを使用してデータを符号化する、請求項19に記載の装置。
- 前記第1の符号化器は、1/2レートおよび2/3レートのうちの一方の符号化レートでデータを符号化し、前記第2の符号化器は、1/2レートおよび2/3レートのうちの一方の符号化レートでデータを符号化する、請求項19に記載の装置。
- 前記第2の符号化器に結合されたパンクチャ・ブロックをさらに含み、前記パンクチャ・ブロックは、前記第2の符号化器から出力された、符号化されたデータの少なくとも一部を取り除く、請求項19に記載の装置。
- 前記受信されたデータが、各々が187バイトのデータを含むパケットに配列される、請求項19に記載の装置。
- 前記パンクチャ・ブロックに結合されたパケタイザ・ブロックをさらに含み、前記パケタイザ・ブロックは、24個のパケット、26個のパケット、および52個のパケットのうちのいずれかの数のパケットのグループからなるパンクチャされたパケットのグループを出力する、請求項26に記載に装置。
- 前記第1のバイト符号化器および前記第2の符号化器がガロア体GF直列連結型ブロック符号化器に含まれる、請求項19に記載の装置。
- テレビジョン放送システムにおいて使用される装置において、
第1のバイトコード符号化処理を使用して前記データを符号化する手段であって、該符号化されたデータはシステマティックな部分と非システマティックな部分を含み、前記システマティックな部分は前記受信したデータのパケットの一部であり、前記非システマティックな部分は前記システマティックな部分、及び他のシステマティックな部分と非システマティックな部分に基づいて生成される、前記符号化する手段と、
前記符号化されたデータをインタリーブする手段であって、前記システマティックな部分と前記非システマティックな部分のサイズの整数倍であり、そして受信したデータのパケットサイズより小さいインタリーバ長を使用する、前記インタリーブする手段と、
第2のバイトコード符号化処理を使用して前記インタリーブされたデータを符号化する手段であって、前記インタリーブされたデータの前記システマティックな部分と前記非システマティックな部分を符号化することを含む、前記符号化する手段と、を含む前記装置。 - 前記第1のバイトコード符号化処理を使用して符号化する手段および前記第2のバイトコード符号化処理を使用して符号化する手段が前記データを補足するためのガロア体生成行列を使用する手段を含む、請求項29に記載の装置。
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