A family of music database services from Gracenote, Emeryville, CA (www.gracenote.com), the leading media identification company. In the mid-1990s, Gracenote, formerly CDDB, Inc., created the first online music database of missing album and artist information for music CDs (see CDDB). As of 2009, Gracenote databases held information on nearly 100 million audio tracks and more than a million videos. Following are Gracenote's identification services for music and video. MusicID CD (Search by Table of Contents) The original service, formerly known as CD Database (CDDB), that started the company, MusicID CD is used to identify music discs by their table of contents (track numbers and lengths). See music CD identification. MusicID File (Search by File Fingerprint) A digital audio file tagging service that computes an acoustic fingerprint for MP3 and other audio files and matches it against a fingerprint database. See music file identification. MusicID Stream (Search by Audio Fingerprint) Similar in concept to MusicID File, this service computes a more robust acoustic fingerprint in order to identify a song by listening to a sample anywhere in the middle. When used in cellphones, this falls under Gracenote's Mobile MusicID brand. VideoID DVD, VideoID Blu-Ray, VideoID File The video counterparts to the audio services for obtaining meta-data about a disc or TV episode. Like music CDs, table of contents data are used to identify DVD and Blu-ray discs, and a video fingerprint is used to identify video files. See video fingerprint and music search.