Ultra High Definition Television (or UHDTV, 4320p, and 8K) is a digital video format proposed by NHK Science & Technology Research Laboratories. It has a resolution of 16 times the number of pixels of the 1080p high-definition television standard, which brings it to roughly the detail level of IMAX.NHK advocates this video format as Super Hi-Vision.

UHDTV's main specifications:

SMPTE first released Standard 2036 for UHDTV in 2007. UHDTV was defined as having two levels called UHDTV1 (3840x2160 or 4K) and UHDTV2 (7680x4320 or 8K). Before 2011, UHDTV allowed for frame rates of 24, 25, 50, and 60 frames per second. In a ITU-R meeting during 2011, an additional frame rate was added to UHDTV of 120 frames per second.

NHK researchers had to build their own UHDTV prototype from scratch. In the system demonstrated in September 2003, they used an array of 16 HDTV recorders to capture the 30-minute-long test footage. The camera itself was built with four 2.5 inch (64 mm) CCDs, each with a resolution of only 3840 × 2048. Using two CCDs for green and one each for red and blue, they then used a spatial pixel offset method to bring it to 7680 × 4320. The system was demonstrated at Expo 2005, Aichi, Japan, the NAB 2006 and NAB 2007 conferences, Las Vegas, at IBC 2006 and IBC 2008,Amsterdam, Netherlands, and CES 2009. A review of the NAB 2006 demo was published in a Broadcast Engineering e-newsletter.

Captain America is a fictional character, a superhero who appears in comic books published by Marvel Comics. The character first appeared in Captain America Comics #1 (cover-dated March 1941), from Marvel Comics' 1940s predecessor, Timely Comics, and was created by Joe Simon and Jack Kirby. As of 2007, an estimated 210 million copies of "Captain America" comic books had been sold in 75 countries. For nearly all of the character's publication history, Captain America was the alter ego of Steve Rogers, a frail young man who was enhanced to the peak of human perfection by an experimental serum in order to aid the United States war effort. Captain America wears a costume that bears an American flag motif, and is armed with an indestructible shield that can be thrown as a weapon.

An intentionally patriotic creation who was often depicted fighting the Axis powers of World War II, Captain America was Timely Comics' most popular character during the wartime period. After the war ended, the character's popularity waned and he disappeared by the 1950s aside from an ill-fated revival in 1953. Captain America was reintroduced during the Silver Age of comics when he was revived from suspended animation by the superhero team the Avengers in The Avengers #4 (March 1964). Since then, Captain America has often led the team, as well as starring in his own series.