ACRCloud is the world champion of MIREX2015 Algorithm Evaluation for Audio Fingerprinting, which is the kind of most stabled and effective Automatic content recognition (ACR) technology widely used in many applications.

Automatic Content Recognition

Automatic content recognition (ACR) is an identification technology to recognise content played on a media device or present in a media file. This enables users quickly obtain detailed information about the content they have just experienced without any text based input or search efforts.

ACR can help users deal with multimedia more effectively and make applications more intelligent.

For More Information, see: ACR

Audio Fingerprinting

Audio Fingerprinting is the kind of most stabled, effective algorithm of ACR and has been widely used in many applications.

An audio fingerprint is a condensed digital summary, deterministically generated from an audio signal, that can be used to identify an audio sample or quickly locate similar items in an audio database. The follow picture gives us an intuitive understanding of audio fingerprint, we can take the black lines and points as fingerprints.

audio fingerprinting

For More Information, see: Audio Fingerprinting

How Automatic Content Recognition (ACR) Works


The patented Automatic Content Recognition (ACR) technology enables the generation of a real-time fingerprint to identify the content being played via an audio or video source which is typically a first screen, in order to trigger an action. ACRCloud’s technology allows it to accurately identify content characteristics of the audio, independently of metadata, file hashes or watermark and across file formats, codecs, bit rates and compression techniques, uniquely in a matter of seconds.

Second Screen Synchronization

This refers to any second-device activity that is triggered by an audio or video stream, broadcast TV or a live event. Triggered activities include Interactions like voting, Information display related to the content, Social Media Feeds related to the content and Advertising.