公开(公告)号：US20080276265A1

公开(公告)日：2008-11-06

申请号：US12110951

申请日：2008-04-28

Applicant: Alexander Topchy ,  Srinivasan Venugopal

Inventor： Alexander Topchy ,  Srinivasan Venugopal

IPC: H04H20/14

CPC classification number: H04H60/58 ,  G06F17/30743 ,  H04H20/14 ,  H04H2201/90

Abstract: Methods and apparatus for characterizing media are described. In one example, a method of characterizing media includes capturing a block of audio; converting at least a portion of the block of audio into a frequency domain representation; dividing the frequency domain representation into a plurality of bands; determining a characteristic difference of a first band of the plurality of bands based on a comparison of a characteristic of the first band and a characteristic of a second band different from the first band, wherein the characteristic of the first band occurs at a time that is different than a time at which the characteristic of the second band takes place; and determining a signature bit based on a characteristic difference. Other examples are shown and described.

Abstract translation: 描述用于表征介质的方法和装置。 在一个示例中，表征媒体的方法包括捕获音频块; 将音频块的至少一部分转换成频域表示; 将频域表示划分成多个频带; 基于所述第一频带的特性与不同于所述第一频带的第二频带的特性的比较，确定所述多个频带中的第一频带的特征差，其中，所述第一频带的特性在 不同于发生第二频带特性的时间; 以及基于特征差确定签名比特。 示出和描述其他示例。