The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 01, 2022
Filed:
Sep. 09, 2019
Dolby Laboratories Licensing Corporation, San Francisco, CA (US);
Dong Shi, Singapore, SG;
Glenn N. Dickins, Como, AU;
David Gunawan, Sydney, AU;
Xuejing Sun, Beijing, CN;
Dolby Laboratories Licensing Corporation, San Francisco, CA (US);
Abstract
In an audio processing system (), a filtering section (): receives subband signals () corresponding to audio content of a reference signal () in respective frequency subbands; receives subband signals () corresponding to audio content of a response signal () in the respective subbands; and forms filtered inband references () by applying respective filters () to the subband signals of the reference signal. For a frequency subband: filtered crossband references () are formed by multiplying, by scalar factors (), filtered inband references of other subbands; a composite filtered reference () is formed by summing the filtered inband reference of the subband () and the filtered crossband references; a residual signal () is computed as a difference between the composite filtered reference and the subband signal of the response signal corresponding to the subband; and the scalar factors and the filter applied to the subband signal of the reference signal corresponding to the subband are adjusted based on the residual signal.