Case Studies: Fuji Television Network, Inc.

12G-SDI transmission of video output had been assumed from the start. However, it was determined that stable transmission of a 12G-SDI video signal would not be possible over the long distance from the rooftop information capturing camera to the base instruments, so 3G-SDI transmission was adopted. The 4K Multi Purpose Camera AK-UB300GJ was enabled for 3G TICO output by adding the 3G TICO UHD Output Board, reducing the number of 3G-SDI lines from four to a single cable. Though there were concerns over image quality deterioration and delay caused by TICO compression, once video was shot, and TICO compression was compared to that of uncompressed 12G-SDI, very little image quality deterioration or delay was found and the effectiveness of 3G TICO compression was clear. The output TICO compressed video was converted to 3G-SDI x 4 using the 3G TICO & 12G to Quad 3G SDI Converter AK-UGB01G set up at the operation center. After being sent through a converter to change the signal to 12G-SDI 4K and HD, the signals are sent to the sub control rooms handling BS4K and terrestrial broadcast, respectively. The HD signal is constantly recording to construct an environment for broadcast at any time.

The images captured by the information capturing camera on the Fuji Television headquarters rooftop are said to be the face of the company. Video capture was tested at every time of day to verify the high color reproducibility required for images of the entire sky in morning, midday, noon and night. The 4K Multi Purpose Camera AK-UB300GJ was highly evaluated for substantial utility in media coverage. Compatible with the HDR/ITU-R BT.2020, it boasts perfect resolution, color and gradation. Even at night when there is little light and the gain is raised, sensitivity is high with no granulation. It was further confirmed that there was little difference in color quality between 4K video and down converted 2K video.