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:
Oct. 11, 2016
Filed:
Mar. 23, 2015
Stmicroelectronics Asia Pacific Pte Ltd, Singapore, SG;
Stmicroelectronics International N.v., Schiphol, NL;
Peng Zhang, Beijing, CN;
Shuzheng Xu, Beijing, CN;
Pengjun Wang, Beijing, CN;
Sapna George, Singapore, SG;
Huazhong Yang, Beijing, CN;
STMICROELECTRONICS INTERNATIONAL N.V., Schiphol, NL;
STMICROELECTRONICS ASIA PACIFIC PTE. LTD., Singapore, SG;
Abstract
The present invention is a system and method for digital watermarking, which discloses a system for digital watermarking, to add a watermark to an audio signal generated by a signal source. The system comprises: a spectrum modulator configured to perform spectrum modulation to a watermark bit and a pseudo noise signal to be embedded into the audio signal to generate a modulated signal; a distortion controller coupled to the signal source and the spectrum modulator and configured to shape the modulated signal based on the audio signal, so as to generate a shaped signal satisfying a predetermined distortion constraint; and an interference compensator coupled to the signal source and the distortion controller and configured to generate a compensation signal based on the audio signal, the pseudo noise signal, and the shaped signal, wherein the compensation signal is for compensating for interference to watermark decoding caused by the audio signal.