Title:
2つの入力オーディオ信号から少なくとも3つのオーディオ信号を導出する方法
Document Type and Number:
Japanese Patent JP4540285
Kind Code:
B2
Abstract:
Various equivalent adaptive audio matrix arrangements are disclosed, each of which includes a feedback-derived control system that automatically causes the cancellation of undesired matrix crosstalk components in the matrix output. Each adaptive audio matrix arrangement includes a passive matrix that produces a pair of passive matrix signals in response to two input signals. A feedback-derived control system operates on each pair of passive matrix signals, urging the magnitudes of pairs of intermediate signals toward equality. Each control system includes variable gain elements and a feedback and comparison arrangement generating a pair of control signals for controlling the variable gain elements. Additional control signals may be derived from the two pairs of control signals for use in obtaining more than four output signals from the adaptive matrix.
Inventors:
Fosgate, James W
Application Number:
JP2001541298A
Publication Date:
September 08, 2010
Filing Date:
November 28, 2000
Export Citation:
Assignee:
DOLBY LABORATORIES LICENSING CORPORATION
International Classes:
H04S3/02; H04S5/02; H04S5/00
Domestic Patent References:
| JP60190043A | ||||
| JP11331998A | ||||
| JP6500898A |
Foreign References:
| US4589129 | ||||
| US5644640 | ||||
| EP0949845A2 |
Attorney, Agent or Firm:
Yuzo Yamazaki
Kenkyo Kanayama
Naoto Sugiyama
Kenkyo Kanayama
Naoto Sugiyama