It is true that Fraunhofer IIS
owns the patents for MP3 technology, but the patent only covers the encoding principles, not the actual method of taking a specific digital audio signal (e.g. from an ordinary 44 kHz CD) and turning it into an MP3 encoded signal. The latter technology is where
Lucent comes in.
An analogous patent is that for the
RSA cryptosystem. The patent covers the mathematical principles, but not the method(s) of computation. A fast RSA implementation may involve
Montgomery multiplication, which would be covered by a separate patent.
'Luthon64