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SynchroStream 

Time-Synchronous IP Transmission

Overview

Perfectly Aligned SFN Synchronicity 

APT’s SynchroStream technology is the industry’s best dynamic STL latency control for FM Single Frequency Networks with overlapping transmitter contours.  FM Radio is still the most consumed medium across society today. The programs are local, it is free, and reception can be mobile; all excellent attributes. However, if your station cannot be received well throughout the broadcast area, this will affect your listener retention. Synchronized transmitter arrangements today are designed and optimized with visualization software and measurement equipment that provide an excellent prediction of RF contours in the terrain.   

Well-performing boosters and translators are important tools for increasing coverage, a better reception performance and better ratings, and leads to new revenue opportunities. With modern FM transmitters and directive antenna arrays, interference induced fading effects are kept to a minimum. However, a key factor to achieve the desired enhancements by boosters and translators is the perfect synchronization of the program feeds and control of the modulation timing in the air.

SynchroStream sets new standards in terms of the precise and location-stable placement of RF transition zones in the terrain. 

Benefits

Content Time-
Synchronization

SynchroStream is the must-have solution for locking content to time over IP transmissions. Broadcasting networks or surround sound transmissions benefit from the high precision of SynchroStream. The user defines the latency of a transmission, only once, and SynchroStream presents distributed contents at the exact same time. 

Content_Time_Synchronization dark blue icon

How Does SynchroStream Work?

STL-Latency Compensation & Modulation-Timing 

SynchroStream application _ 1

Compensating Dynamic Latencies

SynchroStream compensates dynamic latencies in the transport network, meaning all decoders output audio/MPX at the exact same time – even if one link is slower than the other.

How does it work? 

  • Encoder timestamps all outcoming audio/MPX packets and calculate the target delay (applied to all decoders).
  • Decoders receive the packets with timestamps and regenerate the audio/MPX signal at the same time. 

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