Patents and Legal Issues
Like all MP3 encoders, LAME implements some technology covered by patents owned by the Fraunhofer Society and other entities. The developers of LAME do not themselves license the technology described by these patents. Distributing compiled binaries of LAME, its libraries, or programs that derive from LAME in countries that recognize those patents may be patent infringing.
The LAME developers state that, since their code is only released in source code form, it should only be considered as an educational description of an MP3 encoder, and thus does not infringe any patent by itself when released as source code only. At the same time, they advise users to obtain a patent license for any relevant technologies that LAME may implement before including a compiled version of the encoder in a product. Some software is released using this strategy: companies use the LAME library, but obtain patent licenses.
In November 2005, there were reports that the Extended Copy Protection rootkit included on some Sony Compact Discs included portions of the LAME library without complying with the terms of the LGPL.
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