Shazam


Shazam je jednou z najpopulárnejších aplikácií na svete, ktorá slúži na okamžité rozpoznanie hudby. Mesačne ju využívajú stovky miliónov ľudí po celom svete a je úplne zadarmo.

Aplikácia Shazam je veľmi jednoduchou a jej úloha je rozpoznať hudbu. Pýtate sa, na čo to môže byť dobré? Predstavte si, že cestujete v aute a počúvate rádio, v ktorom započujete skladbu, ktorá sa vám naozaj páči. Často ale prepočujete jej autora či názov, takže si ju neskôr nemôžete vyhľadať a pustiť znova. V tom okamihu nastupuje Shazam, ktorému stačí len niekoľko sekúnd zvukovej nahrávky, z ktorej dokáže získať nielen autora skladby a jej názov, ale aj ďalšie podrobné informácie. Výsledok hľadania sa uloží vo vašej histórii a vy si tak kedykoľvek môžete danú skladbu či autora opäť vypočuť..

AKO TO FUNGUJE

Spoločnosť Shazam používa vstavaný mikrofón smartfónu alebo počítača na zhromaždenie krátkej ukážky prehrávaného zvuku. Vytvára akustický odtlačok na základe vzorky a porovnáva ju s centrálnou databázou hudby. Ak nájde zhodu, odošle požívateľovi informácie, ako napríklad umelec, titul skladby a album. Niektoré implementácie Shazamu obsahujú relevantné odkazy na služby ako iTunes, Spotify, Youtube alebo Groove Music. Každá skladba má svoj “podpis”. Ten je reprezentovaný melódiou a notami, ktoré vytvárajú jedinečný sled zvukov. Tento sled sa v databázach Shazamu mení na akúsi digitálnu značku, ktorá je potom porovnávaná s nahrávkou, ktorú vytvoríte. Tento systém funguje tak dobre, že názov skladby či jej autora môžete vyhľadať aj tým, že zaspievate kúsok textu, ktorý si pamätáte v približne rovnakej melódii. Na vyhľadanie informácií o skladbe je ale potrebný internet, prípadne si nahrávku môžete uložiť do pamäte zariadenia a skladbu vyhľadať neskôr, keď budete online.

História

Spoločnosť Shazam bola založená v roku 1999 študentami Chrisom Bartonom, Philipom Inghelbrechtom, Dhirajom Mukherjeem, ktorý pracoval v londýnskej internetovo poradenskej firme Viant a Markom Anthony Hashom- consultant managerom pre Ericson v Stockholme. Kvôli potrebe spracovania digitálneho signálusi najali špecialistu Averyho Wanga, doktoranta Stanfordskej Univerzity, ktorý je od septembra 2012 v spoločnosti ako vedúci vedec Shazam. 




Shazam is an application developed by Shazam Entertainment Ltd. The application can identify music, movies, advertising, and television shows, based on a short sample played and using the microphone on the device. On 11 December 2017, Shazam Entertainment Ltd. was bought by Apple Inc. The software is available for Android, macOS, iOS, watchOS and tvOS. Shazam Entertainment Limited was founded in 1999 by Chris Barton, Philip Inghelbrecht, Avery Wang, and Dhiraj Mukherjee.

In December 2013, according to its CEO, Shazam was one of the top ten most popular apps in the world.

As of August 2014, the Shazam app had more than 100 million monthly active users and had been used on more than 500 million mobile devices.

In October 2014, Shazam announced its technology has been used to identify 15 billion songs.

In October 2016, Shazam announced its mobile apps have been downloaded more than 1 billion times, and users have performed more than 30 billion "Shazams" since launch.

In December 2017, Apple Inc. announced it would be buying Shazam for a reported $400 million (£300 million). On 23 April 2018, the European Commission stated that it would be reviewing the acquisition.

On September 6, 2018, the acquisition was approved.

Overview

Shazam identifies songs based on an audio fingerprint based on a time-frequency graph called a spectrogram. It uses a smartphone or computer's built-in microphone to gather a brief sample of audio being played. Shazam stores a catalogue of audio fingerprints in a database. The user tags a song for 10 seconds and the application creates an audio fingerprint. Shazam works by analyzing the captured sound and seeking a match based on an acoustic fingerprint in a database of more than 11 million songs. If it finds a match, it sends information such as the artist, song title, and album back to the user. Some implementations of Shazam incorporate relevant links to services such as iTunes, Spotify, YouTube, or Groove Music.Once it creates the fingerprint of the audio, Shazam starts the search for matches in the database. If there is a match, it returns the information to the user; otherwise it returns a "song not known" dialogue.

Shazam can identify prerecorded music being broadcast from any source, such as a radio, television, cinema or music in a club, provided that the background noise level is not high enough to prevent an acoustic fingerprint being taken, and that the song is present in the software's database.

Shazam offers two types of applications: a free app simply called Shazam, and a paid app called Shazam Encore. In September 2012, the service was expanded to enable TV users in the US to identify featured music, access cast information, and get links to show information online, as well as added social networking capabilities.

In February 2014, Shazam announced a redesign of the app, which included a new look and additional features, including lyric-viewing options, access to music videos and related videos, unique recommendations, improved biographies and discographies, and additional functionality for use with TV shows. The update also featured a News Feed and Auto-Shazam, a feature introduced in December 2013, which runs in the background of users’ mobile devices to automatically identify media.