FLAC is an audio codec that provides lossless compression. This means that even though the audio is compressed, it is perfectly preserved. When your listeners hear it, it will be identical to your source audio. (Note that all FLAC encoding is lossless.) Ogg FLAC is FLAC compressed audio wrapped into an Ogg transport stream, which is better suited for online radio streaming than native FLAC. As a result, Ogg FLAC has emerged as the defacto standard for lossless online audio streaming.
Rocket Broadcaster Pro is one of the only broadcasting applications that supports Ogg FLAC. If you would like to provide a lossless Ogg FLAC stream for your radio station so your listeners can enjoy it in "perfect quality", try Rocket Broadcaster Pro.