SIMULCAST SYSTEM USING TRANSLATED AUDIO
Original Publication Date: 1996-Aug-01
Included in the Prior Art Database: 2002-Apr-18
Expensive, special transport equipment is needed to carry a composite analog signal consisting of voice and sub-audible signaling from the prime site of a simulcast system to the remote site of the simulcast system. The portion of the audio band spectrum (within the transport equipment), which is carrying the sub-audible signaling modulation, must be gain stable and with a repeatable amplitude response. The simulcast repeater also has same gain and ampli- tude response constraints. These constraints, stable and accurate frequency response below 5 Hz, place performance requirements on the system that are difficult to maintain and measure. Most audio measurement equipment is not accurate at these frequencies.