JP4864037B2 - 可聴信号中の情報の復号化 - Google Patents
可聴信号中の情報の復号化 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/28—Arrangements for simultaneous broadcast of plural pieces of information
- H04H20/30—Arrangements for simultaneous broadcast of plural pieces of information by a single channel
- H04H20/31—Arrangements for simultaneous broadcast of plural pieces of information by a single channel using in-band signals, e.g. subsonic or cue signal
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- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/018—Audio watermarking, i.e. embedding inaudible data in the audio signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H2201/00—Aspects of broadcast communication
- H04H2201/50—Aspects of broadcast communication characterised by the use of watermarks
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Description
したがって、本発明の目的は、可聴信号中の符号記号(コード・シンボル)を検出して、低レベルの信号とバースト・エラーの時間によって発生する問題を緩和するシステムと方法を提供することである。
本発明は、情報を符号記号の冗長系列若しくはシークエンス(redundant sequences of code symbols)に変換する非常に強靱な符号化の使用に関する。或る実施例では、各符号記号がいろいろな所定の単一周波数符号信号の集合によって表されるが、他の実施例では、各種符号記号がオプションとして或る単一周波数符号信号を共用することができる。つまり、所定の記号に所定の周波数成分を割り当てない方法(methodology)で与えることができる。記号の冗長系列は、可聴信号に組み込まれ、聴取者には知覚されないが、復元可能な符号化可聴信号を発生する。
102 入力(可聴信号を受信する手段)
116 累積する手段
120 検出する手段
Claims (13)
- 所定のメッセージを復号するシステムであって、
可聴信号が再生されて聞かれる際に複数のメッセージ記号(S1,S2)が非可聴となるように該可聴信号中に組み込まれた該可聴信号を受信する手段(マイクロフォン93,入力102)であって、前記複数のメッセージ記号は、前記可聴信号中に繰り返し組み込まれ、かつ前記所定のメッセージ内に複数の符号記号として含まれ、前記各メッセージ記号(S1、S2)は、前記可聴信号内に組み込まれ時間的に第1の符号記号(S1、S2)と第2の符号記号(次順目のS1またはS1オフセット、次順目のS2またはS2オフセット)の間(S1と、次順目のS1またはS1オフセットの間、およびS2と、次順目のS2またはS2オフセットの間)に位置しそのメッセージ記号とは異なるものを示す少なくとも1つの符号記号であるマーカー記号を有する前記可聴信号内で、時間的にずらされ、かつ互いに異なる前記第1と第2の符号記号によって表され、前記第1の符号記号およびそれに対応する前記第2の符号記号は、共通のメッセージ記号を表し、かつ繰り返す冗長系列のコア・ユニットの一部を形成するものである、前記受信する手段と、
前記所定のメッセージ記号(S1、S2)を表わす前記第1の符号記号の各第1の信号値と、前記所定のメッセージ記号(S1、S2)を表わす前記第2の符号記号の各第2の信号値とを累積する手段(機能116)と、
前記第1の符号記号及び前記第2の符号記号によって表わされた前記所定のメッセージ記号(S1、S2)を検出するため、前記累積された第1の信号値と前記累積された第2の信号値を調べて前記各共通メッセージ記号(S1、S2)を検出する手段(機能120)と、
を含む前記システム。 - 請求項1記載のシステムにおいて、前記累積する手段は、前記第1の信号値と前記第2の信号値から取り出した第3の信号値を発生し、前記調べる手段は、前記第3の信号値に基づいて前記所定のメッセージ記号を検出する、前記システム。
- 請求項2記載のシステムにおいて、前記累積する手段は、前記第1の信号値と前記第2の信号値を線形的に結合することにより、前記第3の信号値を発生する前記システム。
- 請求項2記載のシステムにおいて、前記累積する手段は、前記第1の信号値と前記第2の信号値の非線形関数として前記第3の信号値を発生する前記システム。
- 請求項1記載のシステムにおいて、前記累積する手段は前記第1の信号値と前記第2の信号値を格納し、前記検出する手段は前記第1の信号値と前記第2の信号値の両者を調べることにより前記所定のメッセージ記号を検出する、前記システム。
- 請求項1記載のシステムにおいて、前記受信する手段は、音響可聴信号を電気信号に変換する音響トランスデユーサ(マイクロフォン93)を含み、前記音響可聴信号は、該音響可聴信号のソースデータを含む複数のメッセージ記号を表す複数の符号記号を有し、検出したメッセージ記号の表示を格納するメモリをさらに含む前記システム。
- 請求項5記載のシステムであって、聴取者メンバーによる搬送用に適応したシステムの容器(ハウジング92)と、聴取推定値を発生する場合の使用のために、格納されたデータを送信する手段(送信器97)とをさらに含む前記システム。
- 所定のメッセージを復号する方法であって、
可聴信号が再生されて聞かれる際に複数のメッセージ記号(S1,S2)が非可聴となるように該可聴信号中に組み込まれた該可聴信号の受信であって、前記複数のメッセージ記号は、前記可聴信号中に繰り返し組み込まれ、かつ前記所定のメッセージ内に複数の符号記号として含まれ、前記各メッセージ記号(S1、S2)は、前記可聴信号内に組み込まれ時間的に第1の符号記号(S1、S2)と第2の符号記号(次順目のS1またはS1オフセット、次順目のS2またはS2オフセット)の間(S1と、次順目のS1またはS1オフセットの間、およびS2と、次順目のS2またはS2オフセットの間)に位置しそのメッセージ記号とは異なるものを示す少なくとも1つの符号記号であるマーカー記号を有する前記可聴信号内で、時間的にずらされ、かつ互いに異なる前記第1と第2の符号記号によって表され、前記第1の符号記号およびそれに対応する前記第2の符号記号は、共通のメッセージ記号を表し、かつ繰り返す冗長系列のコア・ユニットの一部を形成するものである、を受信し、
前記所定のメッセージ記号(S1、S2)を表わす前記第1の符号記号の各第1の信号値と、前記所定のメッセージ記号(S1、S2)を表わす前記第2の符号記号の各第2の信号値とを累積し、
前記所定のメッセージシ記号(S1、S2)を検出するため、前記累積された第1の信号値と前記累積された第2の信号値を調べて前記各共通メッセージ記号(S1、S2)を検出すること、
を含む前記方法。 - 請求項8記載の方法において、音響可聴信号を電気信号に変換することによって前記第1の符号記号と前記第2の符号記号を受信し、前記音響可聴信号は、該音響可聴信号のソースデータを含む複数のメッセージ記号を有し、検出したメッセージ記号の表示を表すデータを格納する、ことをさらに含む前記方法。
- 請求項9記載の方法において、聴取推定値を発生する場合に使用するために、格納されたデータを送信することをさらに含む前記方法。
- 所定のメッセージを復号するシステムであって、
可聴信号が再生されて聞かれる際に複数のメッセージ記号(S1,S2)が非可聴となるように該可聴信号中に組み込まれた該可聴信号のための入力装置(マイクロフォン93)であって、前記複数のメッセージ記号は、前記可聴信号中に繰り返し組み込まれ、かつ前記所定のメッセージ内に複数の符号記号として含まれ、前記各メッセージ記号(S1、S2)は、前記可聴信号内に組み込まれ時間的に第1の符号記号(S1、S2)と第2の符号記号(次順目のS1またはS1オフセット、次順目のS2またはS2オフセット)の間(S1と、次順目のS1またはS1オフセットの間、およびS2と、次順目のS2またはS2オフセットの間)に位置しそのメッセージ記号とは異なるものを示す少なくとも1つの符号記号であるマーカー記号を有する前記可聴信号内で、時間的にずらされ、かつ互いに異なる前記第1と第2の符号記号によって表され、前記第1の符号記号およびそれに対応する前記第2の符号記号は、共通のメッセージ記号を表し、かつ繰り返す冗長系列のコア・ユニットの一部を形成するものである、前記入力装置と、
前記入力装置から前記可聴信号を受信するため前記入力装置と通信するデジタルプロセッサ(デジタル信号処理プロセッサ95)であって、前記第1の符号記号を表わす第1の信号値と、前記第2の符号記号を表わす第2の信号値とを累積するようにプログラムされて、前記所定メッセージ記号(S1,S2)を検出するために前記累積された第1の信号値と前記累積された第2の信号値を調べるように更にプログラムされている前記デジタルプロセッサと、
を含む前記システム。 - 請求項11記載のシステムにおいて、前記入力装置は、音響可聴信号を電気信号に変換するための音響トランスデユーサを含み、前記音響可聴信号は、該音響可聴信号のソースデータを含む複数のメッセージ記号を表す複数の符号記号を有し、前記デジタルプロセッサは、検出したメッセージ記号の表示を表すデータを格納するメモリを有する前記システム。
- 請求項12記載のシステムにおいて、聴取者メンバーによる搬送用に適応したシステムの容器と、聴取推定値を発生する場合の使用のために、格納されたデータを送信する手段をさらに含む前記システム。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US09/318,045 US6871180B1 (en) | 1999-05-25 | 1999-05-25 | Decoding of information in audio signals |
US09/318,045 | 1999-05-25 |
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JP2000620622A Division JP4136314B2 (ja) | 1999-05-25 | 2000-05-22 | 可聴信号中の情報の復号化 |
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JP4864037B2 true JP4864037B2 (ja) | 2012-01-25 |
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JP2008087232A Expired - Lifetime JP4864037B2 (ja) | 1999-05-25 | 2008-03-28 | 可聴信号中の情報の復号化 |
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US (2) | US6871180B1 (ja) |
EP (1) | EP1228504B1 (ja) |
JP (2) | JP4136314B2 (ja) |
KR (1) | KR100490289B1 (ja) |
CN (1) | CN1282152C (ja) |
AT (1) | ATE488921T1 (ja) |
AU (1) | AU5038400A (ja) |
BR (1) | BR0010723A (ja) |
CA (1) | CA2371414C (ja) |
CH (1) | CH693695A5 (ja) |
CY (1) | CY1111624T1 (ja) |
CZ (1) | CZ304746B6 (ja) |
DE (2) | DE10084633B3 (ja) |
DK (2) | DK1228504T3 (ja) |
ES (1) | ES2354347T3 (ja) |
FI (1) | FI120329B (ja) |
GB (1) | GB2369977B (ja) |
HK (1) | HK1050068B (ja) |
IL (2) | IL146134A0 (ja) |
MX (1) | MXPA01011840A (ja) |
MY (1) | MY124752A (ja) |
NO (1) | NO318581B1 (ja) |
PL (1) | PL198972B1 (ja) |
PT (1) | PT1228504E (ja) |
SE (1) | SE524325C2 (ja) |
TW (1) | TW484294B (ja) |
WO (1) | WO2000072309A1 (ja) |
ZA (1) | ZA200110472B (ja) |
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