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. 16, 2018
Filed:
Oct. 24, 2012
Applicants:
Peter Graham Craven, Greater London, GB;
Malcolm Law, West Sussex, GB;
Inventors:
Peter Graham Craven, Greater London, GB;
Malcolm Law, West Sussex, GB;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G10L 19/00 (2013.01); G10L 19/018 (2013.01); G11B 20/00 (2006.01); G11B 20/10 (2006.01);
U.S. Cl.
CPC ...
G10L 19/0017 (2013.01); G10L 19/018 (2013.01); G11B 20/00289 (2013.01); G11B 20/00891 (2013.01); G11B 20/10527 (2013.01); G11B 2020/10546 (2013.01);
Abstract
Methods are disclosed for an encoder to embed a data stream into a quantized PCM digital audio signal and for a corresponding decoder to both retrieve the data stream and losslessly reconstruct the exact original audio. Some methods employ complimentary amplification and attenuation, while others employ gain redistribution. Pre-emphasis and soft clipping techniques are described as methods of losslessly reducing the peak excursion of the PCM audio signal. Also described is the lossless placing of data at predetermined positions within an audio stream.