1.
720p
–
720p is a progressive HDTV signal format with 720 horizontal lines and an aspect ratio of 16,9, normally known as widescreen HDTV. The number 720 stands for the 720 horizontal scan lines of display resolution. The p stands for progressive scan, i. e. non-interlaced, when broadcast at 60 frames per second, 720p features the highest temporal resolution possible under the ATSC and DVB standards. The term assumes a widescreen ratio of 16,9. 720i is a term found in numerous sources and publications. Typically, it is an error in which the author is referring to the 720p HDTV format. However, in cases it is incorrectly presented as an actual alternative format to 720p. No proposed or existing broadcast standard permits 720 interlaced lines in a frame at any frame rate. Progressive scanning reduces the need to prevent flicker by anti-aliasing single high contrast horizontal lines and it is also easier to perform high-quality 50↔60 Hz conversion and slow-motion clips with progressive video. A 720p60 video has advantage over 480i and 1080i60 in that it reduces the number of 3,2 artifacts introduced during transfer from 24 frame/s film. However, 576i and 1080i50, which are common in Europe, generally do not suffer from pull down artifacts as film frames are simply played at 25 frames and the audio pitch corrected by 25/24ths. As a result, 720p60 is used for U. S. broadcasts while European HD broadcasts often use 1080i50 24* frame, arte, a dual-language French-German channel produced in collaboration by ARD, ZDF and France Télévisions, broadcasts in German at 720p50 but in French at 1080i50. EBU Technical paper on HDTV formats
2.
576i
–
576i is a standard-definition video mode originally used for broadcast television in most countries of the world where the utility frequency for electric power distribution is 50 Hz. Because of its association with the colour encoding system, it is often referred to as simply PAL, PAL/SECAM or SECAM when compared to its 60 Hz NTSC-colour-encoded counterpart. The 576 identifies a vertical resolution of 576 lines, and the i identifies it as an interlaced resolution and its basic parameters common to both analogue and digital implementations are,576 scan lines or vertical pixels of picture content,25 frames per second. Digital information not to be displayed as part of the image can be transmitted in the lines, teletext and other services. Analogue television signals have no pixels, they are rastered in scan lines, in digital applications, the number of pixels per line is an arbitrary choice as long as it fulfils the sampling theorem. Values above about 500 pixels per line are enough for conventional broadcast television, DVB-T, DVD and DV allow better values such as 704 or 720. The video format can be transported by major digital television formats, ATSC, DVB and ISDB, and on DVD, when 576i video is transmitted via baseband, most of the differences between the one-letter systems are no longer significant, other than vertical resolution and frame rate. Digital video uses its own separate space, so even the minor colour space differences between PAL and SECAM become moot in the digital domain. When 576i is used to transmit content that was composed of 25 full progressive frames per second. This is the opposite of NTSC, motion pictures are typically shot on film at 24 frames per second. When telecined and played back at PALs standard of 25 frames per second and this also applies to most TV series that are shot on film or digital 24p. Depending on the system in use, it also slightly increases the pitch of the soundtrack by 70.67 cents. More recently, digital conversion methods have used algorithms which preserve the pitch of the soundtrack. Conversion methods exist that can convert 24 frames per second video to 25 frames per second with no speed increase, however image quality suffers when conversions of this type are used. This method is most commonly employed through conversions done digitally, and is employed in situations where the importance of preserving the speed of the video outweighs the need for image quality. Many movie enthusiasts prefer PAL over NTSC despite the formers speed-up, because the results in telecine judder. States the majority of authorities on the subject favour PAL over NTSC for DVD playback quality, also DVD reviewers often make mention of this cause. For example, in his PAL vs. NTSC article, the founder of MichaelDVD says, Personally, I find all but intolerable and find it very hard to watch a movie on an NTSC DVD because of it
3.
Pakistan
–
Pakistan, officially the Islamic Republic of Pakistan, is a federal parliamentary republic in South Asia on the crossroads of Central Asia and Western Asia. It is the sixth-most populous country with a population exceeding 200 million people, in terms of area, it is the 33rd-largest country in the world with an area covering 881,913 square kilometres. It is separated from Tajikistan by Afghanistans narrow Wakhan Corridor in the north, Pakistan is unique among Muslim countries in that it is the only country to have been created in the name of Islam. As a result of the Pakistan Movement led by Muhammad Ali Jinnah and it is an ethnically and linguistically diverse country, with a similarly diverse geography and wildlife. Initially a dominion, Pakistan adopted a constitution in 1956, becoming an Islamic republic, an ethnic civil war in 1971 resulted in the secession of East Pakistan as the new country of Bangladesh. The new constitution stipulated that all laws were to conform to the injunctions of Islam as laid down in the Quran. Pakistan has an economy with a well-integrated agriculture sector. The Pakistani economy is the 24th-largest in the world in terms of purchasing power and it is ranked among the emerging and growth-leading economies of the world, and is backed by one of the worlds largest and fastest-growing middle classes. The post-independence history of Pakistan has been characterised by periods of military rule, the country continues to face challenging problems such as illiteracy, healthcare, and corruption, but has substantially reduced poverty and terrorism and expanded per capita income. It is also a member of CERN. Pakistan is a signatory to the Kyoto Protocol, the Paris Agreement, the name Pakistan literally means land of the pure in Urdu and Persian. It is a play on the word pāk meaning pure in Persian and Pashto, the letter i was incorporated to ease pronunciation and form the linguistically correct and meaningful name. Some of the earliest ancient human civilisations in South Asia originated from areas encompassing present-day Pakistan, the earliest known inhabitants in the region were Soanian during the Lower Paleolithic, of whom stone tools have been found in the Soan Valley of Punjab. The Vedic Civilization, characterised by Indo-Aryan culture, laid the foundations of Hinduism, Multan was an important Hindu pilgrimage centre. The Vedic civilisation flourished in the ancient Gandhāran city of Takṣaśilā, the Indo-Greek Kingdom founded by Demetrius of Bactria included Gandhara and Punjab and reached its greatest extent under Menander, prospering the Greco-Buddhist culture in the region. Taxila had one of the earliest universities and centres of education in the world. At its zenith, the Rai Dynasty of Sindh ruled this region, the Pala Dynasty was the last Buddhist empire, which, under Dharampala and Devapala, stretched across South Asia from what is now Bangladesh through Northern India to Pakistan. The Arab conqueror Muhammad bin Qasim conquered the Indus valley from Sindh to Multan in southern Punjab in 711 AD, the Pakistan governments official chronology identifies this as the time when the foundation of Pakistan was laid
4.
Afghanistan
–
Afghanistan, officially the Islamic Republic of Afghanistan, is a landlocked country located within South Asia and Central Asia. It has a population of approximately 32 million, making it the 42nd most populous country in the world. It is bordered by Pakistan in the south and east, Iran in the west, Turkmenistan, Uzbekistan, and Tajikistan in the north and its territory covers 652,000 km2, making it the 41st largest country in the world. The land also served as the source from which the Kushans, Hephthalites, Samanids, Saffarids, Ghaznavids, Ghorids, Khiljis, Mughals, Hotaks, Durranis, the political history of the modern state of Afghanistan began with the Hotak and Durrani dynasties in the 18th century. In the late 19th century, Afghanistan became a state in the Great Game between British India and the Russian Empire. Following the Third Anglo-Afghan War in 1919, King Amanullah unsuccessfully attempted to modernize the country and it remained peaceful during Zahir Shahs forty years of monarchy. A series of coups in the 1970s was followed by a series of wars that devastated much of Afghanistan. The name Afghānistān is believed to be as old as the ethnonym Afghan, the root name Afghan was used historically in reference to a member of the ethnic Pashtuns, and the suffix -stan means place of in Persian. Therefore, Afghanistan translates to land of the Afghans or, more specifically in a historical sense, however, the modern Constitution of Afghanistan states that he word Afghan shall apply to every citizen of Afghanistan. An important site of historical activities, many believe that Afghanistan compares to Egypt in terms of the historical value of its archaeological sites. The country sits at a unique nexus point where numerous civilizations have interacted and it has been home to various peoples through the ages, among them the ancient Iranian peoples who established the dominant role of Indo-Iranian languages in the region. At multiple points, the land has been incorporated within large regional empires, among them the Achaemenid Empire, the Macedonian Empire, the Indian Maurya Empire, and the Islamic Empire. Archaeological exploration done in the 20th century suggests that the area of Afghanistan has been closely connected by culture and trade with its neighbors to the east, west. Artifacts typical of the Paleolithic, Mesolithic, Neolithic, Bronze, urban civilization is believed to have begun as early as 3000 BCE, and the early city of Mundigak may have been a colony of the nearby Indus Valley Civilization. More recent findings established that the Indus Valley Civilisation stretched up towards modern-day Afghanistan, making the ancient civilisation today part of Pakistan, Afghanistan, in more detail, it extended from what today is northwest Pakistan to northwest India and northeast Afghanistan. An Indus Valley site has found on the Oxus River at Shortugai in northern Afghanistan. There are several smaller IVC colonies to be found in Afghanistan as well, after 2000 BCE, successive waves of semi-nomadic people from Central Asia began moving south into Afghanistan, among them were many Indo-European-speaking Indo-Iranians. These tribes later migrated further into South Asia, Western Asia, the region at the time was referred to as Ariana
5.
Iran
–
Iran, also known as Persia, officially the Islamic Republic of Iran, is a sovereign state in Western Asia. Comprising a land area of 1,648,195 km2, it is the second-largest country in the Middle East, with 82.8 million inhabitants, Iran is the worlds 17th-most-populous country. It is the country with both a Caspian Sea and an Indian Ocean coastline. The countrys central location in Eurasia and Western Asia, and its proximity to the Strait of Hormuz, Tehran is the countrys capital and largest city, as well as its leading economic and cultural center. Iran is the site of to one of the worlds oldest civilizations, the area was first unified by the Iranian Medes in 625 BC, who became the dominant cultural and political power in the region. The empire collapsed in 330 BC following the conquests of Alexander the Great, under the Sassanid Dynasty, Iran again became one of the leading powers in the world for the next four centuries. Beginning in 633 AD, Arabs conquered Iran and largely displaced the indigenous faiths of Manichaeism and Zoroastrianism by Islam, Iran became a major contributor to the Islamic Golden Age that followed, producing many influential scientists, scholars, artists, and thinkers. During the 18th century, Iran reached its greatest territorial extent since the Sassanid Empire, through the late 18th and 19th centuries, a series of conflicts with Russia led to significant territorial losses and the erosion of sovereignty. Popular unrest culminated in the Persian Constitutional Revolution of 1906, which established a monarchy and the countrys first legislative body. Following a coup instigated by the U. K. Growing dissent against foreign influence and political repression led to the 1979 Revolution, Irans rich cultural legacy is reflected in part by its 21 UNESCO World Heritage Sites, the third-largest number in Asia and 11th-largest in the world. Iran is a member of the UN, ECO, NAM, OIC. Its political system is based on the 1979 Constitution which combines elements of a democracy with a theocracy governed by Islamic jurists under the concept of a Supreme Leadership. A multicultural country comprising numerous ethnic and linguistic groups, most inhabitants are Shia Muslims, the largest ethnic groups in Iran are the Persians, Azeris, Kurds and Lurs. Historically, Iran has been referred to as Persia by the West, due mainly to the writings of Greek historians who called Iran Persis, meaning land of the Persians. As the most extensive interactions the Ancient Greeks had with any outsider was with the Persians, however, Persis was originally referred to a region settled by Persians in the west shore of Lake Urmia, in the 9th century BC. The settlement was then shifted to the end of the Zagros Mountains. In 1935, Reza Shah requested the international community to refer to the country by its native name, opposition to the name change led to the reversal of the decision, and Professor Ehsan Yarshater, editor of Encyclopædia Iranica, propagated a move to use Persia and Iran interchangeably
6.
Tajikistan
–
Tajikistan, officially the Republic of Tajikistan, is a mountainous, landlocked country in Central Asia with an estimated 8 million people in 2013, and an area of 143,100 km2. It is bordered by Islamic Republic of Afghanistan to the south, the Republic of Uzbekistan to the west, the Kyrgyz Republic to the north, the Islamic Republic of Pakistan lies to the south, separated by the narrow Wakhan Corridor. Traditional homelands of Tajik people included present-day Tajikistan, Afghanistan and Uzbekistan, a civil war was fought almost immediately after independence, lasting from 1992 to 1997. Since the end of the war, newly established political stability, Tajikistan is a presidential republic consisting of four provinces. Most of Tajikistans 8 million people belong to the Tajik ethnic group, many Tajiks also speak Russian as their second language. Mountains cover more than 90% of the country and it has a transition economy that is highly dependent on remittances, aluminium and cotton production. Tajikistan means the Land of the Tajiks, the suffix -stan is Persian for place of or country and Tajik is, most likely, the name of a pre-Islamic tribe. Tajikistan appeared as Tadjikistan or Tadzhikistan in English prior to 1991 and this is due to a transliteration from the Russian, Таджикистан. In Russian, there is no single letter j to represent the phoneme /ʤ/ and дж, Tadzhikistan is the most common alternate spelling and is widely used in English literature derived from Russian sources. Tadjikistan is the spelling in French and can occasionally be found in English language texts, the way of writing Tajikistan in the Perso-Arabic script is. The earliest recorded history of the dates back to about 500 BCE when much, if not all. After the regions conquest by Alexander the Great it became part of the Greco-Bactrian Kingdom, northern Tajikistan was part of Sogdia, a collection of city-states which was overrun by Scythians and Yuezhi nomadic tribes around 150 BCE. The Silk Road passed through the region and following the expedition of Chinese explorer Zhang Qian during the reign of Wudi commercial relations between Han China and Sogdiana flourished. Sogdians played a role in facilitating trade and also worked in other capacities, as farmers, carpetweavers, glassmakers. Later the Hephthalite Empire, a collection of tribes, moved into the region. Central Asia continued in its role as a crossroads, linking China, the steppes to the north. It was temporarily under the control of the Tibetan empire and Chinese from 650–680, the Samanid Empire,819 to 999, restored Persian control of the region and enlarged the cities of Samarkand and Bukhara which became the cultural centres of Iran and the region was known as Khorasan. The Kara-Khanid Khanate conquered Transoxania and ruled between 999–1211, during Genghis Khans invasion of Khwarezmia in the early 13th century the Mongol Empire took control over nearly all of Central Asia
7.
Karachi
–
Karachi is the capital of Sindh, and is the largest and most populous city in Pakistan, as well as the 7th largest in the world and the worlds second most populous city proper. Ranked as a world city, the city is Pakistans premier industrial and financial centre. Karachi is also Pakistans most cosmopolitan city, though the Karachi region has been inhabited for millennia, the city was founded as a village named Kolachi that was established as a fortified settlement in 1729. By the time of the Partition of British India, the city was the largest in Sindh with a population of 400,000. Immediately following the independence of Pakistan, the population increased dramatically with the arrival of hundreds of thousands of Muslim refugees from India. The city experienced economic growth following independence, attracting migrants from throughout Pakistan. Karachi is now Pakistans premier industrial and financial centre, the city has a formal economy estimated to be worth $113 billion as of 2014. Karachi collects over a third of Pakistans tax revenue, and generates approximately 20% of Pakistans GDP, approximately 30% of Pakistani industrial output is from Karachi, while Karachis ports handle approximately 95% of Pakistans foreign trade. Approximately 90% of the corporations operating in Pakistan are headquartered in Karachi. Up to 70% of Karachis workforce is employed in the informal economy, Karachi is one of Pakistans most secular and socially liberal cities. It is also the most linguistically, ethnically, and religiously diverse city in Pakistan, Karachi is considered to be one of the worlds fastest growing cities, and has communities representing almost every ethnic group in Pakistan. Karachi is also home to over 2 million Bangladeshi migrants,1 million Afghans, the citys murder rate in 2015 had decreased by 75% compared to 2013, and kidnappings decreased by 90%, with the improved security environment triggering sharp increases in real-estate prices. Karachi was reputedly founded in 1729 as the settlement of Kolachi, the new settlement is said to have been named in honour of Mai Kolachi, whose son is said to have slayed a man-eating crocodile in the village after his elder brothers had already been killed by it. The citys inhabitants are referred to by the demonym Karachiite in English, the earliest inhabitants of the Karachi region are believed to have been hunter-gatherers, with ancient flint tools discovered at several sites. The Karachi region is believed to have known to the ancient Greeks. The region may be the site of Krokola, where Alexander the Great once camped to prepare a fleet for Babylonia, in 711 C. E. Muhammad bin Qasim conquered the Sindh and Indus Valley. The Karachi region is believed to have known to the Arabs as Debal. Under Mirza Ghazi Beg the Mughal administrator of Sindh, development of coastal Sindh, under his rule, fortifications in the region acted as a bulwark against Portuguese incursions into Sindh
