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:
Jun. 07, 2011
Filed:
Jul. 25, 2007
Junhui Zhao, Beijing, CN;
Yucheng Wei, Beijing, CN;
Min-yu Hsueh, Beijing, CN;
NEC (China) Co., Ltd., Beijing, CN;
Abstract
The invention provides a method for obtaining related information about a media program containing an audio signal, comprising: embedding an audio watermark containing identification information of the media program into the audio signal; transmitting the media program; recording a portion of the audio signal ; extracting the audio watermark from the recorded portion to obtain the identification information and providing the identification information to a server; and providing the user with the related information according to the identification information from the server, wherein the embedding comprises: performing pre-processing on the identification information to obtain pre-processed identification information; determining an echo delay array; modulating amplitudes of the plurality of pairs of antipodal echoes with the pre-processed identification information; repeating the amplitude-modulated plurality of pairs of antipodal echoes; and embedding the repeated and amplitude-modulated plurality of pairs of antipodal echoes into the audio signal along the echo delay array.