Audible Magic's Awarded Patents

• Copyright Detection and Protection System and Method
  Patent #US 7,363,278 awarded Apr. 22, 2008
  Inventors: Richard Schmelzer and Bryan Pellom
  
  Abstract: A method for detecting against unauthorized transmission of digital works comprises the steps of maintaining a registry of information permitting identification of digital copyrighted works, monitoring a network for transmission of at least one packet-based digital signal, extracting at least one feature from the at least one digital signal, comparing the extracted at least one feature with registry information and applying business rules based on the comparison result.
   
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• Method and Apparatus for Identifying an Unknown Work
  Patent #US 6,968,337 awarded Nov. 22, 2005
  Inventor: Erling Wold
  
  Abstract: A system for determining an identity of a received work. The system receives audio data for an unknown work. The audio data is divided into segments. The system generates a signature of unknown work from each of the segments. Reduced dimension signatures are then generated at least a portion of the signatures. The reduced dimension signatures are then compared to reduced dimensions signatures of known works that are stored in a database. A list of candidates of know works is generated from the comparison. The signatures of the unknown works are then compared to the signatures of the known works in the list of candidates. The unknown work is then identified as the known work having signature matching within a threshold.
   
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• Method and Apparatus for Identifying Media Content Presented on a Media Playing Device
  Patent #US 6,834,308 awarded Dec. 21, 2004
  Inventors: Vance Ikezoye and James Schrempp
  
  Abstract: A system and method for identifying media content presented over a media playing device. The media content, such as audio and/or video, is either available digitally or digitally sampled. The media content is sampled to generate a media sample or analytical representation of the media content. The media sample is compared to a collection of sampled (or represented) media content to identify it and to ascertain information related to the sample. This media content-related information is then presented to the user via a display means on the media player. The media play then presents the user specific and related actions that are based upon the information presented and allows the user to directly execute their choice of actions.
   
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• Method and Article of Manufacture for Content-based Analysis, Storage Retrieval, and Segmentation of Audio Information
  Patent #US 5,918,223 awarded Jun. 29, 1999
  Inventors: Thomas Blum, Douglas Keislar, James Wheaton, Erling Wold
  
  Abstract: A system that performs analysis and comparison of audio data files based upon the content of the data files is presented. The analysis of the audio data produces a set of numeric values (a feature vector) that can be used to classify and rank the similarity between individual audio files typically stored in a multimedia database or on the World Wide Web. The analysis also facilitates the description of user-defined classes of audio files, based on an analysis of a set of audio files that are members of a user-defined class. The system can find sounds within a longer sound, allowing an audio recording to be automatically segmented into a series of shorter audio segments.
   
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