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2. Acoustic fingerprint - Wikipedia

   en.wikipedia.org/wiki/Acoustic_fingerprint

   A robust acoustic fingerprint algorithm must take into account the perceptual characteristics of the audio. If two files sound alike to the human ear, their acoustic fingerprints should match, even if their binary representations are quite different. Acoustic fingerprints are not hash functions, which are sensitive to any small changes in the ...

3. List of file signatures - Wikipedia

   en.wikipedia.org/wiki/List_of_file_signatures

   A file signature is data used to identify or verify the content of a file. Such signatures are also known as magic numbers or magic bytes. Many file formats are not intended to be read as text. If such a file is accidentally viewed as a text file, its contents will be unintelligible.

4. Musipedia - Wikipedia

   en.wikipedia.org/wiki/Musipedia

   The latter can identify short snippets of audio (a few seconds taken from a recording), even if it is transmitted over a phone connection. Shazam uses Audio Fingerprinting for that, a technique that makes it possible to identify recordings. Musipedia, on the other hand, can identify pieces of music that contain a given melody.

5. Video file format - Wikipedia

   en.wikipedia.org/wiki/Video_file_format

   A video file format is a type of file format for storing digital video data on a computer system. Video is almost always stored using lossy compression to reduce the file size. A video file normally consists of a container (e.g. in the Matroska format) containing visual (video without audio) data in a video coding format (e.g. VP9 ) alongside ...

6. Digital video fingerprinting - Wikipedia

   en.wikipedia.org/wiki/Digital_video_fingerprinting

   Video fingerprinting systems enable content providers (e.g., film studios) or publishers (e.g., user-generated content [UGC] sites) to determine if any of the publisher's files contain content registered with the fingerprint service. If registered content is detected, the publisher can take the appropriate action—remove it from the site ...

7. Shazam (music app) - Wikipedia

   en.wikipedia.org/wiki/Shazam_(music_app)

   Shazam is an application that can identify music based on a short sample played using the microphone on the device. [2] It was created by the British company Shazam Entertainment, based in London, and has been owned by Apple since 2018. The software is available for Android, macOS, iOS, Wear OS, watchOS and as a Google Chrome extension.

8. MP4 file format - Wikipedia

   en.wikipedia.org/wiki/MP4_file_format

   MPEG-4 files with audio and video generally use the standard .mp4 extension. Audio-only MPEG-4 files generally have a .m4a extension. This is especially true of unprotected content. MPEG-4 files with audio streams encrypted by FairPlay digital rights management as were sold through the iTunes Store use the .m4p extension.

9. Container format - Wikipedia

   en.wikipedia.org/wiki/Container_format

   Overhead. This is the difference in file-size between two files with the same content in a different container. Support for advanced codec functionality. Older formats such as AVI do not support new codec features like B-frames, VBR audio or VFR video natively. The format may be "hacked" to add support, but this creates compatibility problems.