World´s first hybrid 3DTV broadcasting experiment

New broadcasting services such as 3DTV and UHDTV are turning up and catching the public attention, because people nowadays like to have more realistic watching experience in TV. However, terrestrial broadcasters have difficulties in launching them, because new terrestrial broadcasting services necessarily need new frequency allocation. As frequency is public goods and the frequency for broadcasting is limited. To solve the lack of frequency, we designed hybrid 3DTV broadcasting technology combining terrestrial broadcasting channel and broadband network. For the hybrid 3DTV, the left view is transmitted through the terrestrial broadcasting channel and the right view is delivered using the internet. The difference of two transport networks causes inevitable receiving time delay. To synchronize the left view and the delayed right view by frame accuracy, we insert SMPTE time code into the left and right elementary streams respectively and transmit them. To verify the validity and practicality of hybrid 3DTV service, we performed live broadcasting of `IAAF World Championships´ in August 2011 via hybrid 3DTV technology.