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:
Sep. 04, 2012
Filed:
Feb. 07, 2007
Stéphane Ragot, Lannion, FR;
Romain Trilling, Marnes la Coquette, FR;
Stéphane Ragot, Lannion, FR;
Romain Trilling, Marnes la Coquette, FR;
France Telecom, Paris, FR;
Abstract
A hierarchical audio coder for use in a frequency band divided into adjacent first and second sub-bands, the coder including: a core coder () for coding an original signal in the first sub-band of the frequency band; a stage () for calculating a residual signal (e) from the original signal and the signal from the core coder; a device () for perceptually weighting the residual signal (e). The perceptual weighting device includes a perceptually weighted filter () with gain compensation adapted to realize spectral continuity between the output signal of the perceptually weighted filter with gain compensation and the signal in the second sub-band. Application to transmitting and storing digital signals, such as audio-frequency speech, music, etc. signals.
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