News Column

Patent Application Titled "Method and System for Content Sampling and Identification" Published Online

August 23, 2014



By a News Reporter-Staff News Editor at Investment Weekly News -- According to news reporting originating from Washington, D.C., by VerticalNews journalists, a patent application by the inventor Wang, Avery Li-Chun (Palo Alto, CA), filed on March 17, 2014, was made available online on August 7, 2014.

The assignee for this patent application is Shazam Investments Limited.

Reporters obtained the following quote from the background information supplied by the inventors: "As industries move toward multimedia rich working environments, usage of all forms of audio and visual content representations (radio broadcast transmissions, streaming video, audio canvas, visual summarization, etc.) becomes more frequent. Whether a user, content provider, or both, everybody searches for ways to optimally utilize such content. For example, one method that has much potential for creative uses is content identification. Enabling a user to identify content that the user is listening to or watching offers a content provider new possibilities for success.

"In the field of broadcast monitoring and subsequent content identification, it is often desirable to identify as much audio content as possible while minimizing effort expended. In an example system, audio samples from a broadcast stream (such as a radio or television broadcast) are recorded and each audio sample is sent to an identification means, which returns an identity of the content of the audio sample. The recordation time of each audio sample can also be noted and a broadcast playlist can then be constructed that may list the audio tracks that were broadcast on each broadcast channel being monitored.

"Existing monitoring systems may sample a broadcast stream periodically instead of continually and thus potentially under-sample the broadcast stream. In such an instance, content of a short duration may not be sampled at all and may be missed entirely. Alternatively, a monitoring system may over-sample a broadcast stream, which results in performing redundant samplings and content identifications, wasting computational effort. As a result, a method of optimizing sampling periods is desirable."

In addition to obtaining background information on this patent application, VerticalNews editors also obtained the inventor's summary information for this patent application: "Within embodiments disclosed herein, a method for segmenting an audio stream is presented. The method includes receiving a sample of an audio stream and a start time of the sample, and then determining a track identity of the sample and a relative time offset of the sample from a beginning of the identified track. The method further includes calculating an extrapolated start time of the identified track within the audio stream using the relative time offset and the start time of the sample. The extrapolated start time indicates a boundary between tracks in the audio stream.

"In another aspect, the method includes receiving samples of an audio stream and start times of each sample, and for each sample, determining a track identity and an extrapolated start time of the identified track within the audio stream. The method further includes identifying samples having substantially similar extrapolated start times, and for samples having substantially similar extrapolated start times, verifying that the samples also have matching track identities.

"In still another aspect, the method includes receiving an audio stream and selecting a portion of audio from the audio stream that comprises a sample from the audio stream. The method also includes determining a track identity of the sample and calculating an extrapolated start time and an extrapolated end time of the identified track within the audio stream. The method further includes marking a segment of the audio stream between the extrapolated start time and the extrapolated end time as a recognized audio segment, and calculating the next time to sample the audio stream based on a length of the recognized audio segment.

"These as well as other features, advantages and alternatives will become apparent to those of ordinary skill in the art by reading the following detailed description, with appropriate reference to the accompanying drawings.

BRIEF DESCRIPTION OF FIGURES

"FIG. 1 illustrates one example of a system for identifying content within an audio stream.

"FIG. 2 is a flowchart depicting one example of a method for identifying content within a broadcast audio stream.

"FIG. 3 conceptually illustrates one example of a process for identifying audio captured from an audio stream.

"FIG. 4 is a flowchart depicting one example of a method for storing identified tracks.

"FIG. 5 conceptually illustrates one example of adaptively adjusting a sampling interval of an audio stream.

"FIG. 6 is a flowchart depicting one example of a method for adaptively adjusting a sampling interval of an audio stream.

"FIG. 7 conceptually illustrates another example of a process of identifying audio captured from an audio stream."

For more information, see this patent application: Wang, Avery Li-Chun. Method and System for Content Sampling and Identification. Filed March 17, 2014 and posted August 7, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=1483&p=30&f=G&l=50&d=PG01&S1=20140731.PD.&OS=PD/20140731&RS=PD/20140731

Keywords for this news article include: Investment and Finance, Shazam Investments Limited.

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Source: Investment Weekly News


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