Title:
オーディオ信号に対するマスタリング改善
Document Type and Number:
Japanese Patent JP6805416
Kind Code:
B2
Abstract:
Methods and devices are described for reducing the audible effect of pre-responses in an audio signal. The pre-responses are effectively delayed by employing a digital non-minimum-phase filter, which includes a zero lying outside the unit circle in its z-transform response. This zero is not paired with another zero at a reciprocal position inside the unit circle, as this would linearise the phase modification. The filtering can introduce a greater group delay at the pre-response frequency than at a low frequency, such as 500 Hz or even 0 Hz. The technique can be used to reduce pre-responses in an existing audio signal and also to pre-empt pre-responses that would be introduced to the audio signal by subsequent processing.
Inventors:
Peter Graham Craven
Stuart John Robert
Stuart John Robert
Application Number:
JP2017529700A
Publication Date:
December 23, 2020
Filing Date:
December 03, 2015
Export Citation:
Assignee:
MQA Limited
International Classes:
H03H17/00; G11B20/10; H03H17/02
Domestic Patent References:
| JP2008252338A |
Foreign References:
| EP0561881B1 | ||||
| US20090238380 |
Attorney, Agent or Firm:
Maeda patent office