Omnia ONE Installation And Operation Manual

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OmniaONE Multicast - Use and Operation Manual – Version 0.9010and bandwidth limiting methods that were required for analog broadcasting, as well as for the signalnormalization techniques used in recording and mastering.Audio codecs on the other hand are moving targets - each codec algorithm has its own set ofartifacts. So not only does the sonic quality vary depending on the algorithm and bitrate used, butmore importantly they vary in their ability to mask their own coding action. This is why we call it a‘moving target’, and is why conventional audio processors fall short in a coded audio environmentand can actually make coding artifacts worse due to their inability to adapt appropriately to thechanging operation of the codec as the program content changes.Prior art in audio dynamics processing could only address some of the challenges of provisioningaudio for coding. This hurdle existed because the codec adapts to the incoming program (so as togenerate the least amount of output data representing the input audio) causing the sonic artifactsgenerated by the process to continually change. Unless the audio processor can predict thesechanging characteristics of the codec, it can’t possibly create output audio that is perfectly tailoredfor the coding process.Conventional processors utilize rather simplistic high frequency limiters and fixed low pass filteringthat does not change with the program material. When these less intelligent processors feed a codecthe audio might sound acceptable one moment and offensive the next. Because they cannot “know”what the codec will do next, the result is over-compensated, dull and lifeless audio… audio that stillcontains objectionable codec-generated artifacts!OmniaONE Multicast and HD® RadioThe advent of HD RadioR has introduced the capability to transmit multiple program streams, or“Multicast”, within a single 96kbps digital broadcast data channel. To facilitate this, multicast relieson the use of codecs with comparatively low bitrates. A broadcaster can choose to transmit a numberof multicast channels and select the bitrate for each one. However, the more multicast channels thereare, the lower the bitrate each channel must have in order for them to all fit within the total availablebandwidth.In the very near future, many low bitrate multicast audio channels might exist. To achieve maximumsound quality, the kind that attracts and holds listeners, those channels will need specializeddynamics processing capable of creating great sound regardless of program content and bitrate.They will need Sensus®.OmniaONE Multicast was designed from the ground up for provisioning audio for codecs operatingat these low bitrates. With Sensus®, the innovative algorithm inside OmniaONE Multicast, it is nowpossible to have consistently high audio quality with a minimum of codec-induced artifacts.OmniaONE Multicast creates highly listenable audio lacking the dull, muffled, ‘swirley’ soundusually associated with codecs operated at extremely low bitrates.