JP4255461B2 - 電話会議用のステレオ・マイクロフォン処理 - Google Patents
電話会議用のステレオ・マイクロフォン処理 Download PDFInfo
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- JP4255461B2 JP4255461B2 JP2005189507A JP2005189507A JP4255461B2 JP 4255461 B2 JP4255461 B2 JP 4255461B2 JP 2005189507 A JP2005189507 A JP 2005189507A JP 2005189507 A JP2005189507 A JP 2005189507A JP 4255461 B2 JP4255461 B2 JP 4255461B2
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- Prior art keywords
- microphone
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
- H04M3/568—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities audio processing specific to telephonic conferencing, e.g. spatial distribution, mixing of participants
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
- H04N7/142—Constructional details of the terminal equipment, e.g. arrangements of the camera and the display
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R27/00—Public address systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
Description
102 拡声器
104 拡声器
105 ビデオ・カメラ
110 右マイクロフォン
111 マイクロフォン
112 マイクロフォン
113 マイクロフォン
114 マイクロフォン
115 マイクロフォン
116 マイクロフォン
119 会議テーブル
120 左マイクロフォン
121 会議参加者
122 会議参加者
123 会議参加者
141 調停器
142 調停器
152 ミキサ
153 ネットワーク
154 遠端プロセッサ
161 プロセッサ
162 プロセッサ
171 拡声器
172 拡声器
181 周波数分割器
182 調停器
183 周波数分割器
184 ミキサ
201 ビデオ表示画面
202 拡声器
204 拡声器
211 マイクロフォン
212 マイクロフォン
213 マイクロフォン
214 マイクロフォン
215 マイクロフォン
216 マイクロフォン
217 マイクロフォン
218 マイクロフォン
221 マイクロフォン
222 マイクロフォン
223 マイクロフォン
224 マイクロフォン
225 マイクロフォン
226 マイクロフォン
231 会議参加者
233 会議参加者
234 会議参加者
241 ビデオ表示画面
242 ウィンドウ
243 ウィンドウ
244 挿入部
245 ウィンドウ
246 ウィンドウ
410 表示画面
412 カメラ
422 拡声器
424 拡声器
432 マイクロフォン
434 マイクロフォン
440 中央モジュール
441 ビデオ入力インタフェース
442 ビデオ出力インタフェース
443 インタフェース
444 インタフェース
445 オーディオ入力インタフェース
446 オーディオ出力インタフェース
450 プロセッサ装置
451 中間部
452 中間部
453 中間部
454 中間部
456 RAM
457 フラッシュ・メモリ
500 ビデオ会議装置
701 ビデオ表示画面
702 拡声器
704 拡声器
711 マイクロフォン
712 マイクロフォン
714 マイクロフォン
715 マイクロフォン
716 マイクロフォン
717 マイクロフォン
718 マイクロフォン
719 マイクロフォン
721 マイクロフォン
722 マイクロフォン
723 マイクロフォン
724 マイクロフォン
725 マイクロフォン
726 マイクロフォン
732 会議参加者
733 会議参加者
734 会議参加者
740 中央モジュール
Claims (8)
- 電話会議におけるマルチチャンネル・オーディオ信号を処理する方法であって:
複数のチャンネルについて、1つの時間フレームについてマイクロフォン信号を蓄積する工程と、
該時間フレームにおける各マイクロフォン信号を複数の周波数帯域制限部分帯域に分割する工程と、
部分帯域毎に、全てのマイクロフォンからの部分帯域信号を比較する工程と、
最大の信号エネルギを有するマイクロフォンに一票を与える工程と、
マイクロフォン毎に全ての部分帯域について投票を全て加算する工程と、
投票数が該時間フレームに対する投票閾値を超えるマイクロフォン信号を選択する工程と、
チャンネル毎にオーディオ信号を、該1つ又は複数の選択されるマイクロフォン信号から形成する工程と、
チャンネル毎の該オーディオ信号を遠端に送る工程と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:
投票数が該時間フレームに対する投票閾値を超えるマイクロフォンが2つ以上選択された場合、投票数が最大の1つのマイクロフォン信号が保持され、選択された他のマイクロフォン信号が廃棄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:
該時間フレームに対する該閾値を超える投票を有するマイクロフォンが何らない場合、直前時間フレームについて選択されたマイクロフォンが選択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:
該時間フレームにおける各マイクロフォン信号を複数の周波数帯域制限部分帯域に分割する工程が、各マイクロフォン信号を少なくとも50の部分帯域に分割するものであり、該投票閾値が16であることを特徴とする方法。 - 請求項1記載の方法であって、
上記1つのオーディオ・チャンネルについて選択されたマイクロフォン信号を選択されたマイクロフォンの位置に基づいて他のオーディオ・チャンネルにパニングする工程を、上記形成する工程の後に、かつ、上記送る工程の前に、更に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、
会議参加者の画像をビデオ・ディスプレイ上に示す工程と、
選択されたマイクロフォン信号のレベルを、話者の音像位置と、該ビデオ・ディスプレイ上に示される該話者のビデオ画像位置とを一致させるよう調節する工程とを、上記形成する工程の後に、かつ、上記送る工程の前に、更に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、自動利得制御、又は雑音抑制を行う工程を、上記形成する工程の後に、かつ、上記送る工程の前に、更に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、選択されたマイクロフォンのプロファイルを取り出す工程及び、該選択されたマイクロフォンの該取り出されたプロファイルによって該オーディオ信号を処理する工程を、上記形成する工程の後に、かつ、上記送る工程の前に、更に備えることを特徴とする方法。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/881,008 US8687820B2 (en) | 2004-06-30 | 2004-06-30 | Stereo microphone processing for teleconferencing |
Publications (2)
Publication Number | Publication Date |
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JP2006020314A JP2006020314A (ja) | 2006-01-19 |
JP4255461B2 true JP4255461B2 (ja) | 2009-04-15 |
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Application Number | Title | Priority Date | Filing Date |
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JP2005189507A Expired - Fee Related JP4255461B2 (ja) | 2004-06-30 | 2005-06-29 | 電話会議用のステレオ・マイクロフォン処理 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8687820B2 (ja) |
EP (1) | EP1613124B1 (ja) |
JP (1) | JP4255461B2 (ja) |
CN (1) | CN100484177C (ja) |
TW (1) | TWI264934B (ja) |
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-
2004
- 2004-06-30 US US10/881,008 patent/US8687820B2/en active Active
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2005
- 2005-05-31 EP EP05011660.7A patent/EP1613124B1/en active Active
- 2005-06-02 TW TW094118193A patent/TWI264934B/zh active
- 2005-06-29 JP JP2005189507A patent/JP4255461B2/ja not_active Expired - Fee Related
- 2005-06-30 CN CNB2005100818069A patent/CN100484177C/zh active Active
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TWI264934B (en) | 2006-10-21 |
JP2006020314A (ja) | 2006-01-19 |
CN1716986A (zh) | 2006-01-04 |
US20060013416A1 (en) | 2006-01-19 |
EP1613124A2 (en) | 2006-01-04 |
EP1613124A3 (en) | 2009-09-16 |
TW200610373A (en) | 2006-03-16 |
US8687820B2 (en) | 2014-04-01 |
CN100484177C (zh) | 2009-04-29 |
EP1613124B1 (en) | 2017-07-26 |
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