ID3 tag

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ID3 tag

A field of meta-data in MP3 and MP3pro audio files. The tags describe the contents, including song title, artist, album, year, comment, CD track and genre. ID3 tags are used for searching as well as displaying the title being played. In many cases, ID3 tags are not filled in or are erroneous, and an "ID3 tagger" utility, also called an "audio tagger" or "MP3 tagger," can be used to update them. See audio tagging.

Other than MP3
Although often erroneously called ID3 tags, other audio files (AAC, WMA, Ogg Vorbis, etc.) have their own meta-data tag format that holds the same kinds of data. See music search and MusicBrainz.

Why Were Song Titles Missing?
CDs followed phonograph records, which contained nothing but sound waves "carved" into the vinyl platters. Reserving a few thousand bytes for the names of the album, artist and songs when there were 650 million available on the disc might seem obvious, but nobody envisioned playing music on the computer, and digital displays on CD players were expensive back then. Therefore, track number and length were the only meta-data in a CD until more descriptive fields (tags) were added later (see CD Text).

ID3 Format
Version 2 of ID3 (ID3v2) supports the album cover image as well as unlimited title length. The tags were moved to the beginning of the file so that song information is displayed at the start for streaming audio. Version 1 was limited to 30-byte text fields in the last 128 bytes of the file, a 4-byte year and 1-byte genre (80 categories). Version 1.1 (ID3v1.1) added CD track number. For more information, visit www.id3.org. See music CD identification, music search, metadata and streaming audio.
References in periodicals archive ?
In ID3 J48 Algorithm for simulation results we used WEKA machine learning software.
Our first discovery was that Information gain, used by ID3 to evaluate the quality of attributes, was biased to overestimate the multivalued attributes, so normalization was required.
It is an improvement on the ID3 algorithm, with the following modifications:
(a, c, d) Real-time RT-PCR results demonstrated a higher level of Id1 and Id4 mRNA expression in BMMSCs derived from NOD mice compared with BALB/c, while Id2 and Id3 transcripts showed no significant difference between two groups (a) (*** p < 0.0001).
To retain anonymity, each participant was identified by the acronym ID and a randomly assigned number from 1 to 8 (ID1, ID2, ID3, and so on).
Decreased expression of the ID3 gene at 1p36.1 in ovarian adenocarcinomas.
Quinlan [8] summarizes an approach to synthesizing decision trees that have been used in a variety of systems, and it describes one such system, ID3 in detail.
ID3 and C4.5(aka J48) algorithms have been introduced by J.R Quinlan which produce reasonable decision trees.
Hunt et al's work [5] was the origin of decision trees, although they began to gain importance with the publication of the ID3 algorithm proposed by Quinlan [6].
Currently, there are lots of classic decision tree algorithms, such as the ID3 algorithm, the C4.5 algorithm, and the CART algorithm.
We then use Naive Bayes, Logistic Regression, Support Vector Machine, and ID3 Decision Tree to classify these inferences.
El algoritmo C4.5 construye arboles de decision de un sistema de datos del entrenamiento de la misma forma que el algoritmo ID3, que usa el concepto de entropia de la informacion.