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no. That's why there are different manufacturers (brands) that produce mp3 players.

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Yes, it is. MP3 encoders and decoders are covered by a number of patents owned by different companies. The primary patents are owned by Fraunhofer Institute and Thompson Multimedia, who have combined them into a single patent portfolio. All manufacturers of MP3 players must pay a license fee to use the inventions covered by the patent portfolio in their products. (Some manufacturers of early MP3 players refused to pay the licensing fees and Fraunhofer took them to court and won). The Fraunhofer Institute collected about €100 million in licensing fees in 2005. Most of the patents will expire (in the US) by 2015.

This generally has no impact on the consumer, as the cost of the MP3 licenses is part of the cost of the player. It does, however, affect software developers who want to write their own applications which use MP3 encoding and/or decoding algorithms.

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Q: Is MP3 a proprietary format
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