Low-Latency Hybrid Delivery System Using Digital Terrestrial Television Broadcasting and the Internet

We are developing an advanced digital terrestrial television broadcasting (DTTB) system that uses MPEG media transport (MMT) for asset multiplexing, which is based on the Internet protocol (IP), to easily realize integrated broadcast-broadband services. A hybrid delivery system using DTTB and the Internet has also been proposed that can recover lost data from the Internet in the case of broadcasting reception error; however, it suffers from Internet latency. To address this issue, we developed a prototype hybrid system which uses a lowlatency IP and confirmed the effectiveness by field experiments. The result shows that significant reception improvement was obtained.