JP2006520556A - ロバスト・モードでのスタガキャストの、ユーザ制御による切り替えのモード - Google Patents
ロバスト・モードでのスタガキャストの、ユーザ制御による切り替えのモード Download PDFInfo
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Abstract
Description
図1は、本発明の原理によるスタガキャスト送信機100の一部分の構成図である。図を単純にするよう示していない他の構成要素が完全な送信機に必要であるということは当業者が分かる。それらの構成要素が何であるかということと、図示した構成要素とともにそれらの他の構成要素を選択し、設計し、実施し、相互接続する方法とを当業者は更に分かる。
ピクチャ6及び13の場合、通常モードのパケット・ストリームにおけるビデオ・ピクチャは間違っているが、ロバスト・モードのパケット・ストリームにおける相当するビデオ・ピクチャは完全であり、利用可能である。これらのピクチャの場合、セレクタ230’はロバスト・モード復号器240”(JVT)からのビデオ・ピクチャを、図7における「J」によって示すように出力端子215に結合する。これらのピクチャの場合には通常モードのビデオ・ピクチャは何ら存在しないので、ロバスト・モード復号器240”からのロバスト・モード・ビデオ・ピクチャはロバスト・モードのフレームの記憶機構250”と通常モードのフレームの記憶機構250’とに結合される。
Claims (27)
- スタガキャストする方法であって:
コンテンツを表す信号群を符号化する工程を備え、該群は復号化されて、相当する復号化信号群を生成することが可能であり、各復号化信号は、他の符号化信号に相当する復号化信号の品質とは異なる品質を有し;
更に、時間的にずらされた符号化信号群を備えるコンポジット信号を生成する工程;
該符号化信号群を該コンポジット信号から抽出する工程;
該抽出符号化信号群におけるエラーを検出して、間違っていない利用可能抽出符号化信号の部分集合を生成する工程;及び
選択可能な所望の品質での、コンテンツを表す信号を復号化する工程を備えることを特徴とする方法。 - 請求項1記載の方法であって、該所望の品質での、コンテンツを表す信号が利用可能でない場合、該利用可能抽出符号化信号の部分集合からの、選択可能な所望の品質での、コンテンツを表す信号を復号化する工程を備えることを特徴とする方法。
- 請求項2記載の方法であって、該復号化する工程が、該所望の品質での、該コンテンツを表す信号を自動的に選択する工程を備えることを特徴とする方法。
- 請求項3記載の方法であって、該所望の品質を自動的に選択する工程が、該所望の品質を、予め設定された選択パラメータに応じて選択する工程を備えることを特徴とする方法。
- 請求項4記載の方法であって、該パラメータがユーザ入力に応じて予め設定されることを特徴とする方法。
- 請求項1記載の方法であって、該復号化する工程が、該所望の品質をユーザ入力に応じて選択する工程を備えることを特徴とする方法。
- 請求項6記載の方法であって、該所望の品質をユーザ入力に応じて選択する工程が:
該符号化信号群に関する情報を表すイメージを表示させる工程;及び
該情報表示を表示させた後にユーザ入力を受信する工程を備えることを特徴とする方法。 - 請求項7記載の方法であって:
該コンテンツを表す信号はテレビジョン番組を表し;
コンポジット信号を生成する工程は、該符号化された、コンテンツを表す信号群の各々の品質を備えるテレビジョン番組に関する情報を収容する信号を更に含める工程を備え;
該符号化信号を表す情報のイメージが、該テレビジョン番組と該符号化信号群の品質とに関する該情報とを載せる工程を備えることを特徴とする方法。 - 請求項8記載の方法であって、該テレビジョン番組情報を収容する信号が、番組マップ・テーブル(PMT)と、番組及び情報システムのプロトコル−仮想チャンネル・テーブル(PSIP−VCT)との何れか又は両方を表すデータを収容することを特徴とする方法。
- 請求項1記載の方法であって、該コンポジット信号を生成する工程が、該符号化信号群を、最低品質復号化信号が非遅延であるように生成し、他の符号化信号が該最低品質復号化信号に相当する符号化信号に対して、相当する復号化信号の品質が高いほど遅延期間が長くなるように遅延していることを特徴とする方法。
- 請求項1記載の方法であって、該符号化工程が、他の符号化信号の符号化に対してロバストな手法を用いて該符号化信号群の少なくとも1つを符号化する工程を備えることを特徴とする方法。
- 請求項11記載の方法であって、該少なくとも1つのロバスト符号化信号が該最低品質復号化信号に相当する符号化信号を備えることを特徴とする方法。
- 請求項11記載の方法であって、該符号化信号群がチャネル符号化され、該ロバスト符号化信号が、非ロバスト符号化信号に用いるチャネル符号化手法に対してロバストなチャネル符号化手法を用いてチャネル符号化されることを特徴とする方法。
- 請求項13記載の方法であって、該ロバスト符号化信号のチャネル符号化が4−VSB変調と2−VSB変調との一方であり、該非ロバスト符号化信号のチャネル符号化が8−VSB変調であることを特徴とする方法。
- コンテンツを表す、時間的にずらされた、符号化信号群を備えるコンポジット信号を受信するスタガキャスト受信機であって、該群は復号化されて、相当する復号化信号群を生成することが可能であり、各復号化信号は、他の符号化信号に相当する復号化信号の品質とは異なる品質を有し;
該コンポジット信号に応じて、該符号化信号群を抽出し、各符号化信号におけるエラーを検出し、間違っていない利用可能な抽出信号の部分集合を生成する逆多重化装置;及び
該逆多重化装置に結合され、該エラーを表す信号に応じて、選択可能な所望の品質での、コンテンツを表す信号を再生する復号器を備えることを特徴とする受信機。 - 請求項15記載の受信機であって、該復号器が、該利用可能な抽出符号化信号の部分集合からの、選択可能な所望の品質での、コンテンツを表す信号を復号化する回路を、該所望の品質での、コンテンツを表す信号が利用可能でない場合、備えることを特徴とする受信機。
- 請求項16記載の受信機であって、該復号器が更に、該所望の品質での、該コンテンツを表す信号を自動的に選択する回路を備えることを特徴とする受信機。
- 請求項17記載の受信機であって、該復号器が更に、予め設定された選択パラメータを記憶させ、該所望の品質での、該コンテンツを表す信号を該選択パラメータに応じて自動的に選択する回路を備えることを特徴とする受信機。
- 請求項18記載の受信機であって、更に、選択パラメータをユーザ入力に応じて記憶させる回路を備えることを特徴とする受信機。
- 請求項15記載の受信機であって、該復号器が該所望のものをユーザ入力に応じて選択する回路を備えることを特徴とする受信機。
- 請求項20記載の受信機であって、更に、該符号化信号群に関する情報を表すイメージを表示させる画面上表示装置を備えることを特徴とする受信機。
- 請求項21記載の受信機であって:
該コンテンツを表す信号はテレビジョン番組であり、該コンポジット信号は更に、該符号化された、コンテンツを表す信号群の各々の品質を備えるテレビジョン番組に関する情報を収容する信号を備え;
該画面上表示装置は、該テレビジョン番組と該符号化信号群の品質とに関する情報とを載せたものを表示することを特徴とする受信機。 - 請求項22記載の受信機であって、該テレビジョン番組情報を収容する信号が、番組マップ・テーブル(PMT)と、番組及び情報システムのプロトコル−仮想チャンネル・テーブル(PSIP−VCT)との何れか又は両方を表すデータを収容することを特徴とする受信機。
- 請求項15記載の受信機であって、該符号化信号の少なくとも1つが他の信号の符号化に対してロバストである手法を用いて符号化され、該復号器が、該少なくとも1つの符号化信号に応じて該少なくとも1つの符号化信号を復号化する復号器を備えることを特徴とする受信機。
- 請求項16記載の受信機であって、該少なくとも1つのロバスト符号化信号が、最低品質復号化信号に相当する符号化信号を備えることを特徴とする受信機。
- 請求項17記載の受信機であって:
該符号化信号群がチャネル符号化され、該ロバスト符号化信号が4−VSB変調と2−VSB変調との一方を用いてチャネル符号化され、他の符号化信号が8−VSB変調を用いて符号化され;
該復号器が、該ロバスト符号化信号を4−VSB復調と2−VSB復調との一方を用いてチャネル復号化し、該他の符号化信号を8−VSB復調を用いてチャネル復号化する復調器を備えることを特徴とする受信機。 - 請求項15記載の受信機であって
該コンポジット信号が、最低品質復号化信号が非遅延であるような符号化信号群を備え、他の符号化信号は、最低品質復号化信号に相当する符号化信号に対して、相当する復号化信号の品質が高いほど遅延期間が長くなるように遅延しており;
更に、該逆多重化装置と該復号器との間で結合され、各々が該抽出符号化信号群に応じて、該抽出符号化信号を時間的に再整合化する複数の遅延回路を備えることを特徴とする受信機。
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