Ultra HDTV (also known as “Super Hi-Vision” or “Ultra HD”), is an experimental video format conceptualized by the Japanese public broadcasting network, NHK.
An Ultra HD is 4x wider and 4x higher than a normal HDTV screen, which in effect produces a spectacular 7,680 x 4,320 pixels (33,177,600 pixels in total). This is about 16x the pixel resolution than a standard HD screen. However, several health concerns have been raised for this.
In addition to the video quality, the sound quality has improved vastly. 24 channels of audio can be used with 24 speakers, producing a difference comparable to the Ultra HD video resolution. Currenly, only 3 cameras are able to capture video in Ultra HD format for about 20 minutes (4 Terrabytes worth) in a single day. However, it’s wise to remember that the current infrastructure is not designed to cope with Ultra HDTV requirements and in the coming years, many of these current challenges will be addressed.
This could possibly be written for iPsy, but I reckon it will feel at home here.
Audio is incredibly fascinating topic that covers maths, physics, music and cognitive/behavioural psychology. Upon watching a short BBC tech film at late midnight, I learnt about The Shepard Tone.
Named after Rodger Shepard, the Shepard tone is a sound consisting of a superposition of sine waves separated by octaves (an octave is the interval between one musical pitch and another with half or double its frequency). But what’s so special about the Shepard tone?
This superposition of sine waves separated by octaves creates an auditory illusion of a tone that perpetually ascends or descends, without it reaching a limit of it getting higher or lower.
Reconstruction of the Antikythera mechanism in the National Archaeological Museum, Athens (made by Robert J. Deroski, based on Derek J. de Solla Price model)
At the beginning of the 20th century, divers off the island of Antikythera came across this clocklike mechanism, which is thought to be at least 2,000 years old, in the wreckage of a cargo ship. The device was very thin and made of bronze. It was mounted in a wooden frame and had more than 2,000 characters inscribed all over it. Though nearly 95 percent of these have been deciphered by experts, there as not been a publication of the full text of the inscription.
Today it is believed that this instrument was a kind of mechanical analog computer used to calculate the movements of stars and planets in astronomy. It has been estimated that the antikythera mechanism was built around 87 B.C and was lost in 76 B.C. No one has any idea about why or how it came to be on that ill-fated cargo ship. The ship was Roman though the antikythera mechanism was developed in Greece. One theory suggests that the reason it came to be on the Roman ship could be because the instrument was among the spoils of war garnered by then Roman emperor Julius Caesar.
The PC Snob’s stance is one of proprietary knowingness—the pleasure he takes in technology derives not only from the sensory experience of using them, but also from knowing more about it than you do, and from zealously guarding this knowledge from the cheesy, iPhone loving masses, who have no idea what a driver is, or how amazing it is to change their RAM. The PC Snob fairly revels, in fact, in the notion that Apple customers are stupid and ineducable, which is what sets him apart from the more benevolent computer buff, the effervescent, Tech Appreciative-style enthusiast who delights in introducing novitiates to the humble periods of Lisa and MS-DOS.