Title:
コード化されたオーディオの経済的な音量計測
Document Type and Number:
Japanese Patent JP5219800
Kind Code:
B2
Abstract:
Measuring the loudness of audio encoded in a bitstream that includes data from which an approximation of the power spectrum of the audio can be derived without fully decoding the audio is performed by deriving the approximation of the power spectrum of the audio from said bitstream without fully decoding the audio, and determining an approximate loudness of the audio in response to the approximation of the power spectrum of the audio. The data may include coarse representations of the audio and associated finer representations of the audio, the approximation of the power spectrum of the audio being derived from the coarse representations of the audio. In the case of subband encoded audio, the coarse representations of the audio may comprise scale factors and the associated finer representations of the audio may comprise sample data associated with each scale factor.
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Inventors:
Crockett, Brett Graham
Smithers, Michael John
Seefeld, Alan Jeffrey
Smithers, Michael John
Seefeld, Alan Jeffrey
Application Number:
JP2008506480A
Publication Date:
June 26, 2013
Filing Date:
March 23, 2006
Export Citation:
Assignee:
Dolby Laboratories Licensing Corporation
International Classes:
G10L25/21; G10L19/02
Domestic Patent References:
| JP6324093A | ||||
| JP2001141748A | ||||
| JP9261064A | ||||
| JP2001202097A | ||||
| JP2000075897A | ||||
| JP2002094655A | ||||
| JP2002268687A | ||||
| JP9500503A |
Attorney, Agent or Firm:
Tadahiko Ito
Shinsuke Onuki
Tadashige Ito
Yuzo Yamazaki
Naoto Sugiyama
Shirogane Expo
Toshiaki Akamatsu
Okuko Masako
Ichiro Tasaka
Ono Wataru
Shun Hosaka
Tadao Naito
Shinsuke Onuki
Tadashige Ito
Yuzo Yamazaki
Naoto Sugiyama
Shirogane Expo
Toshiaki Akamatsu
Okuko Masako
Ichiro Tasaka
Ono Wataru
Shun Hosaka
Tadao Naito