The aorta is the most critical blood vessel in our body, and the aortic valve between the left ventricle (LV) and the aorta controls blood flow from the heart to the whole body. If the valve malfunctions, blood does not flow correctly, and enough nutrition is not conveyed all over the body. There is so much research on the aortic valve and the blood flow from the LV to the aorta; however, most of the previous works dealt with simplified cylindrical models and the blood flow in the model. The little study simulated the pressure change in the aorta and the LV using a real model generated from medical data. This paper summarizes our previous works that describe the model generation method from CT data, blood flow and pressure change in the aorta and the LV, and the comparison between the simulation results and the medical data.

We are currently developing the advanced broadcasting system for the next generation of digital terrestrial television broadcasting (DTTB). Its physical layer, Advanced Integrated Services Digital Broadcasting-Terrestrial (Advanced ISDB-T), is based on frequency division multiplexing, and large-scale field tests have been conducted at experimental transmitter stations. Its transport layer, MPEG Media Transport (MMT), is based on Internet protocol (IP) and already used in ultra-high definition television (UHDTV) satellite broadcasting, and it enables to provide integrated broadcast and broadband services such as multi-view videos, content replacement, and augmented reality (AR)/virtual reality (VR) in TV programs. In order to show the feasibility of the advanced broadcasting system, complete verifications of it were conducted in four metropolitan cities of Japan. These verifications confirmed that basic services such as UHD content for fixed reception and HD content for mobile reception can be provided simultaneously. Furthermore, MMT/IP-based integrated broadcast-broadband services were verified using data both broadcast and broadband.

In this article, we present a 2-tap indirect time-of-flight (iToF) ranging method using half-pulse (HP) modulation for depth precision enhancement. The operation principle of the ranging method is explained, and theoretical depth noise equations are derived and verified through experiments. Compared to the conventional continuous square-pulse (SP) modulation, the HP modulation exhibited a depth noise reduction of >25% and >29% for the 0.4-3 m range using the HP1 and HP2 methods, respectively. To ensure the depth image quality with moving targets, the motion artifact suppression is demonstrated by applying the sub-frame 4-phase operation. In addition, the application notes and the future directions for utilizing these techniques are discussed.