DaySequerra announced today its launch of the M2HDSP to debut at NAB2009 in Booth N5129. The M2HDSP, DaySequerra’s newest modulation monitor for HD Radio employs the company’s recently developed digital signal processing (DSP) architecture, first introduced in its M4DDM.
Designed especially for HD Radio AM and FM stations, the M2HDSP runs DaySequerra’s new proprietary TimeLock™ algorithm to automatically maintain perfect alignment of the HD Radio main program signal (MPS) analog and HD-1 digital audio. Using its selective off-air tuner, the M2HDSP measures the MPS analog and HD-1 digital audio diversity and generates a continuous stream of correction vectors to keep the analog and digital audio perfectly time and level aligned. These correction vectors are then sent via Ethernet to an HD Radio Embedded Exporter or compatible audio processor to provide the necessary adjustments to the analog audio delay.
The M2HDSP is compatible with all existing HD Radio NE-IBOC Gen I and Gen II AM and FM installations using audio processors such as Omnia’s Omnia-5EX HD with the appropriate Ethernet protocol, as well as new installations using Embedded Exporters from Broadcast Electronics, Continental RVR, Harris and Nautel, and other installations running iBiquity MPS Framework version 4.3 or later.
RBR/TVBR observation: This is very useful—not only are some stations’ transitions from analog to digital in HD Radio poorly timed, but the audio processing in analog to digital transitions is sometimes so far off that the analog sounds louder, clearer and more robust than the digital. When the signal switches back and forth from A to D and back—be it initial acquisition of the station or fading at the edge of digital coverage, the switch should be as seamless and unnoticeable as possible.