There are also open compression formats like Opus and Vorbis that are available free of charge and without any known patent restrictions. Some of the newer audio compression formats, such as AAC, WMA Pro and Vorbis, are free of some limitations inherent to the MP3 format that cannot be overcome by any MP3 encoder. COUNT 4
QSN1 Opus and Vorbis are two explans of what kind of compression format? ANS1 open QSN2 Being open formats means that Opus and Vorbis can be used without what? ANS2 any known patent restrictions QSN3 What are some benefits to some of the newer audio compression formats when compared to MP3? ANS3 free of some limitations inherent to the MP3 format QSN4 How can one obtain an open compression format such as Opus or Vorbis? ANS4 available free of charge