To make broadcasting more user-friendly and convenient by making use of the internet, we conducted R&D on a media-unifying platform that links TV with smartphones and IoT-enabled devices to offer more engaging broadcasting services. We also researched a high-response delivery technology to stabilize the viewing quality of video delivered on the internet and achieve smooth viewing operation. In our research on cryptography and information security, which are essential to ensure high security and reliability of these services, we progressed with our development of cryptography algorithms including one that can be used for post-quantum computer measures in the future. We also researched a TV-watching robot that makes TV viewing more enjoyable. With the aim of establishing an efficient workflow of IP-based program production, we developed IP-based transmission equipment and a device to monitor the status of IP packets. We demonstrated the effectiveness of each device through a verification experiment of IP live production connected with existing program production equipment.