Stereo-to-5.1 upmix processor
Improvements to this processor include superior 5.1 channel separation and lower-latency processing. The new v2 software upgrade is available free to existing UPM-1 owners. TheUPM-1 converts stereo audio to 5.1 surround sound and is popular among digital broadcasters who frequently need to transmit legacy stereo program material in 5.1 surround. Processing latency in the original version of the upmixer was set to one video frame at the request of the broadcast industry, but the version 2 software sees the introduction of a new low-latency mode in which the time taken for upmixing is reduced to 9ms. All new UPM-1s are shipping set to this low-latency mode and with the v2 software pre-installed, although the latency can still be set either to 40ms (one frame in the USA), or 33ms (one frame in Europe) if required.
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