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:
Jan. 05, 2016
Filed:
Apr. 01, 2010
Holly Francois, Guildford, GB;
Jonathan A. Gibbs, Windermere, GB;
Holly Francois, Guildford, GB;
Jonathan A. Gibbs, Windermere, GB;
GOOGLE TECHNOLOGY HOLDINGS LLC, Mountain View, CA (US);
Abstract
An apparatus receives an input encoded audio data signal comprising a base layer and at least one enhancement layer. A reference unit () generates reference audio data corresponding to audio data of a reference set of layers. A layer unit () divides the layers of the input signal into a first subset and a second subset. A sample unit () generates sample audio data corresponding to the audio data of the first subset. A comparison unit () generates a difference measure by comparing the sample audio data to the reference audio data based on a perceptual model. An output unit () then determines if the difference measure meets a similarity criterion and generates an output signal without audio data from a layer of the second subset if the similarity criterion is met and including the audio data of the layer otherwise. The invention may provide reduced data rates without an unacceptable degradation of quality.