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:
Jul. 16, 2013
Filed:
Nov. 23, 2009
Rogerio Guedes Alves, Macomb, MI (US);
Kuan-chieh Yen, Northville, MI (US);
Michael Christopher Vartanian, Commerce Township, MI (US);
Sameer Arun Gadre, Northville, MI (US);
Rogerio Guedes Alves, Macomb, MI (US);
Kuan-chieh Yen, Northville, MI (US);
Michael Christopher Vartanian, Commerce Township, MI (US);
Sameer Arun Gadre, Northville, MI (US);
Cambridge Silicon Radio Limited, Cambridge, GB;
Abstract
The perceived quality of a narrowband speech signal truncated from a wideband speech signal is improved by generating in a third frequency band third speech components matching first speech components in a first frequency band of the narrowband signal, and generating in a fourth frequency band fourth speech components matching second speech components in a second frequency band of the narrowband signal. A first gain factor is applied to the third speech components to generate adjusted third speech components, and a second gain factor is applied to the fourth speech components to generate adjusted fourth speech components, the gain factors being selected such that the ratios of the average powers of the adjusted third and fourth speech components to the average power of the first speech components are predetermined values.