THERE’s a lot of buzz about the new HD Radio codec, according to Richardson Electronics , who says it’s now time to get on with radio’s transition to digital.
Because HD Radio and DAB systems can transmit audio frequencies up to 20kHz, listeners will finally be allowed to hear the full CD spectrum – if their radio stations choose the right on-air processor.
On this point, you should know something important: Some “HD” processors simply hack off everything above 15kHz... robbing listeners of the full HD Radio experience and keeping the industry in a fidelity backwater.
The new Omnia-6EX won’t short-change your listeners. Richardson has built Omnias with sampling rates of 48kHz and higher from the start. All along, sampling headroom was needed to keep analogue FM audio grunge-free. Now it’s essential for DAB and HD Radio.
Even if some listeners wouldn’t notice the missing high frequencies, there’s a fair chance they would hear a sharp 15kHz low-pass filter operating within HD Radio’s codec range.
Omnia-6EX has a unique parallel processing structure that routes audio from the mixer section to separate output stages for conventional FM and DAB. The FM section receives distortion-controlled final limiting with pre-emphasis, and an upper-frequency response of 15kHz.
The DAB section has a multi-band Look-Ahead final limiter with user-selectable frequency response all the way up to the full audio bandwidth of 20kHz.
Omnia-6EX is also full of processing enhancements that result in yet more bass punch, yet more voice clarity, than the original Omnia-6, a sound so powerful, and free of artificial constraints.