Look at your modern-day TV, and you see nothing less than a technological miracle. 看看你现在的电视,你看到不亚于技术奇迹。
Scientists began experimenting with the concept of television<\/a> more than a century ago. But decades would pass before the Radio Corporation of America<\/a> brought it to the public at the 1939 World's Fair. More time passed before TV sets were in stores - and even then, it took awhile until most people had one. In 1950, fewer than 10 per cent of Americans owned a television. By 1959, that number had grown to 85 per cent.
During the '50s, TVs<\/a> were expensive, screens were small and the picture wasn't always crystal clear.
What's more, early TV programmes were in black and white; colour wasn't in wide use until the mid-1960s.
Viewers didn't have a lot of choice, either. Instead of hundreds of channels to choose from, most cities offered only three or four.
And DVR<\/a> didn't exist. Programmes appeared on a specific day at a particular time, and if you missed it - you missed it.
As a professor of electrical and computer engineering, I am amazed by the remarkable advances of this technology in only a few decades.
Yet whether an early television with a 5-inch screen, or one of today's smart TVs that practically cover the wall, your set still has three primary functions: to receive audio and video data; to use that data to present the viewer with sound and a picture; and to provide the viewer with a way to set the channel and the volume.
Radio Waves<\/a>, Transmission Towers And Antennas<\/strong>
Early TVs worked with the use of \"analog signals\" - essentially radio waves containing both the picture and sound of a television programme.
Simply put, here's how it worked: Using a giant transmission tower, the local television station repeatedly sent those radio waves through the air during the broadcast day. Antennas on the roofs of buildings and homes in the community intercepted those waves and, through a cable, transported the signal to the television sets inside.
There, the TV unscrambled the signal and turned it into a picture with sound. What you saw and heard wasn't as sharp as today's TVs, but it was good.
By 2009, TV stations replaced analog signals with digital TV<\/a> signals, which is the standard used today. HDTV, or high-definition television, has an amazing picture quality compared to earlier TVs. Digital<\/a> signals are still transmitted using radio waves, but the TV picture is encoded in binary - that is, a series of 0s and 1s.
Bits, Bytes And Frames<\/strong>
Modern digital TV uses different information streams. For example, one stream is for the picture; another stream is for the audio.
Pictures are created by basic units called pixels. Your TV screen has tens of thousands of pixels, and each one has a \"colour index\" and an \"intensity.\" Basically, three colours - red, blue and green - form other colours in various combinations, and the picture is ultimately created from all the pixels together forming an image. Just like mixing paint to make any colour you wish, varying the amount and intensity of each of the colour pixels creates the desired image.
Groups of bits are formed into larger units called bytes. They are the communication link between the content you are watching and your TV. A modem packages and unpackages this information; at its heart, every TV or cellphone is based on a modem.
The packaged information can be transmitted over the air or sent via fibre or cable, where they come into your TV via a cable box. Streaming TV, a service that has become very popular, takes data from a computer network.
Then it's up to you, the viewer. Your modern digital smart TV has an interface that allows you to control all the functions. Basically, a smart TV is a computer, large monitor and receiver all in one package.
In the future, there will be more merging of the functions of your cellphone and TV. The TV will be a screen for your cellphone, for example. Also expect more virtual reality, augmented reality and ultra-high definition TV.
(This is a PTI story syndicated via The Conversation)<\/em><\/p><\/body>","next_sibling":[{"msid":96043308,"title":"EU countries' stance on AI rules draws criticism from lawmaker, consumer group","entity_type":"ARTICLE","link":"\/news\/eu-countries-stance-on-ai-rules-draws-criticism-from-lawmaker-consumer-group\/96043308","category_name":null,"category_name_seo":"telecomnews"}],"related_content":[{"msid":"95658529","title":"Reality TV stars Todd and Julie Chrisley to be sentenced in tax fraud case","entity_type":"ARTICLE","seopath":"magazines\/panache\/reality-tv-stars-todd-and-julie-chrisley-to-be-sentenced-in-tax-fraud-case","category_name":"Panache","synopsis":"The Chrisleys gained fame with their show 'Chrisley Knows Best', which follows their tight-knit, boisterous family.","thumb":"https:\/\/etimg.etb2bimg.com\/thumb\/img-size-42006\/95658529.cms?width=150&height=112","link":"\/news\/magazines\/panache\/reality-tv-stars-todd-and-julie-chrisley-to-be-sentenced-in-tax-fraud-case\/95658529"},{"msid":"95678539","title":"Zesty 1982 film 'My Favorite Year', a comic salute to TV's golden age, turns 40","entity_type":"ARTICLE","seopath":"magazines\/panache\/zesty-1982-film-my-favorite-year-a-comic-salute-to-tvs-golden-age-turns-40","category_name":"Panache","synopsis":"It paid loving tribute to the original golden age of TV in the mid-20th century.","thumb":"https:\/\/etimg.etb2bimg.com\/thumb\/img-size-44840\/95678539.cms?width=150&height=112","link":"\/news\/magazines\/panache\/zesty-1982-film-my-favorite-year-a-comic-salute-to-tvs-golden-age-turns-40\/95678539"},{"msid":"95525199","title":"'Enjoy the day to the fullest.' Shoaib Malik wishes Sania Mirza on her 36th birthday amid divorce rumours","entity_type":"ARTICLE","seopath":"magazines\/panache\/enjoy-the-day-to-the-fullest-shoaib-malik-wishes-sania-mirza-on-her-36th-birthday-amid-divorce-rumours","category_name":"Panache","synopsis":"The couple will be seen in a new talk show together.","thumb":"https:\/\/etimg.etb2bimg.com\/thumb\/img-size-38008\/95525199.cms?width=150&height=112","link":"\/news\/magazines\/panache\/enjoy-the-day-to-the-fullest-shoaib-malik-wishes-sania-mirza-on-her-36th-birthday-amid-divorce-rumours\/95525199"},{"msid":"95451647","title":"TV actor Siddhaanth Surryavanshi, who starred in 'Kkusum' and 'Kasautii Zindagii Kay', dies at 46 after collapsing in gym","entity_type":"ARTICLE","seopath":"magazines\/panache\/tv-actor-siddhaanth-surryavanshi-who-starred-in-kkusum-kasautii-zindagii-kay-dies-of-heart-attack-at-46","category_name":"Panache","synopsis":"The actor's sudden demise sent shockwaves across the television industry.","thumb":"https:\/\/etimg.etb2bimg.com\/thumb\/img-size-27952\/95451647.cms?width=150&height=112","link":"\/news\/magazines\/panache\/tv-actor-siddhaanth-surryavanshi-who-starred-in-kkusum-kasautii-zindagii-kay-dies-of-heart-attack-at-46\/95451647"},{"msid":"96033611","title":"Television","entity_type":"IMAGES","seopath":"magazines\/panache\/from-bw-screens-to-digital-tv-decoding-the-transformation-of-the-television-set\/television","category_name":"From B&W screens to digital TV: Decoding the transformation of the television set","synopsis":"Viewers didn't have a lot of choice, either. Instead of hundreds of channels to choose from, most cities offered only three or four.","thumb":"https:\/\/etimg.etb2bimg.com\/thumb\/img-size-68530\/96033611.cms?width=150&height=112","link":"\/image\/magazines\/panache\/from-bw-screens-to-digital-tv-decoding-the-transformation-of-the-television-set\/television\/96033611"}],"seoschemas":false,"msid":96043425,"entity_type":"ARTICLE","title":"From B&W screens to digital TV: Decoding the transformation of the television set","synopsis":"During the '50s, TVs were expensive, screens were small and the picture wasn't always crystal clear.","titleseo":"telecomnews\/from-bw-screens-to-digital-tv-decoding-the-transformation-of-the-television-set","status":"ACTIVE","authors":[],"analytics":{"comments":0,"views":373,"shares":0,"engagementtimems":1552000},"Alttitle":{"minfo":""},"artag":"PTI","artdate":"2022-12-07 08:02:14","lastupd":"2022-12-07 08:02:47","breadcrumbTags":["digital TV","digital","radio waves","radio corporation of america","frames modern","antennas early","dvr","tvs","Devices","television"],"secinfo":{"seolocation":"telecomnews\/from-bw-screens-to-digital-tv-decoding-the-transformation-of-the-television-set"}}" data-authors="[" "]" data-category-name="" data-category_id="" data-date="2022-12-07" data-index="article_1">
科学家们开始试验的概念电视一个多世纪以前。但几十年过去了美国无线电公司使公众在1939年世界博览会。更多的时间通过电视机前在商店——即使这样,过了一段时间,直到大多数人有一个。1950年,只有不到10%的美国人拥有一个电视。到1959年,这一数字已经增长到了85%。
在50年代,电视昂贵的,屏幕小,并不总是清晰的图画。
观众没有很多选择,。而不是数百个频道可供选择,大多数城市只提供三个或四个。
和DVR不存在。项目出现在特定的一天在一个特定的时间,如果你错过了它,你错过了它。
电气和计算机工程教授,我惊讶于这种技术的显著进步只有几十年时间。
早期电视是否有5英寸屏幕,或一个今天的智能电视,几乎涵盖了墙,你的设定仍然有三个主要功能:接收音频和视频数据;使用这些数据来给观众声音和图片;,为观众提供一种设置频道和音量。
无线电波、输电塔和天线
早期的电视工作使用“模拟信号”——本质上无线电波包含图片和声音的电视节目。
简单地说,它是如何工作的:用一个巨大的输电塔,当地电视台反复发送这些无线电波在空中在广播的一天。天线在社区建筑和房屋的屋顶上截获这些波,通过电缆传输信号的电视机。
,电视先入为主地用声音信号,把它变成一幅画。你看到和听到的不是今天的电视一样锋利,但是它是好的。
到2009年,电视台取代模拟信号数字电视今天信号,使用的标准。高清电视、高清电视,有一个惊人的画面质量相比,早期的电视。数字信号仍然使用无线电波传播,但电视画面是用二进制编码—也就是说,一连串的0和1。
位、字节和画框
现代数字电视使用不同的信息来源。例如,一个流图;另一个是音频流。
照片是由基本单位称为像素。你的电视屏幕上有成千上万的像素,和每一个都有一个“颜色指数”和一个“强度”。Basically, three colours - red, blue and green - form other colours in various combinations, and the picture is ultimately created from all the pixels together forming an image. Just like mixing paint to make any colour you wish, varying the amount and intensity of each of the colour pixels creates the desired image.
位组形成较大的单位被称为字节。它们之间的通信链接内容你看你的电视。调制解调器包和解开这些信息;其核心,每一个电视或手机是基于调制解调器。
包装信息可以传播在空气或通过光纤或电缆,在他们进入你的电视通过一个电缆盒。流媒体电视的服务已经成为非常受欢迎,从计算机网络获取数据。
然后由你,观众。你的现代数字智能电视有一个界面,允许您控制的所有功能。基本上,智能电视是一种计算机、大型监控和接收器在一个包中。
在未来,将会有更多的合并你的手机和电视的功能。电视将成为你的手机屏幕上,例如。也期待更多的虚拟现实、增强现实和超高清晰度电视。
(这是一个PTI的故事银团通过对话)
读到
Look at your modern-day TV, and you see nothing less than a technological miracle.
Scientists began experimenting with the concept of television<\/a> more than a century ago. But decades would pass before the Radio Corporation of America<\/a> brought it to the public at the 1939 World's Fair. More time passed before TV sets were in stores - and even then, it took awhile until most people had one. In 1950, fewer than 10 per cent of Americans owned a television. By 1959, that number had grown to 85 per cent.
During the '50s, TVs<\/a> were expensive, screens were small and the picture wasn't always crystal clear.
What's more, early TV programmes were in black and white; colour wasn't in wide use until the mid-1960s.
Viewers didn't have a lot of choice, either. Instead of hundreds of channels to choose from, most cities offered only three or four.
And DVR<\/a> didn't exist. Programmes appeared on a specific day at a particular time, and if you missed it - you missed it.
As a professor of electrical and computer engineering, I am amazed by the remarkable advances of this technology in only a few decades.
Yet whether an early television with a 5-inch screen, or one of today's smart TVs that practically cover the wall, your set still has three primary functions: to receive audio and video data; to use that data to present the viewer with sound and a picture; and to provide the viewer with a way to set the channel and the volume.
Radio Waves<\/a>, Transmission Towers And Antennas<\/strong>
Early TVs worked with the use of \"analog signals\" - essentially radio waves containing both the picture and sound of a television programme.
Simply put, here's how it worked: Using a giant transmission tower, the local television station repeatedly sent those radio waves through the air during the broadcast day. Antennas on the roofs of buildings and homes in the community intercepted those waves and, through a cable, transported the signal to the television sets inside.
There, the TV unscrambled the signal and turned it into a picture with sound. What you saw and heard wasn't as sharp as today's TVs, but it was good.
By 2009, TV stations replaced analog signals with digital TV<\/a> signals, which is the standard used today. HDTV, or high-definition television, has an amazing picture quality compared to earlier TVs. Digital<\/a> signals are still transmitted using radio waves, but the TV picture is encoded in binary - that is, a series of 0s and 1s.
Bits, Bytes And Frames<\/strong>
Modern digital TV uses different information streams. For example, one stream is for the picture; another stream is for the audio.
Pictures are created by basic units called pixels. Your TV screen has tens of thousands of pixels, and each one has a \"colour index\" and an \"intensity.\" Basically, three colours - red, blue and green - form other colours in various combinations, and the picture is ultimately created from all the pixels together forming an image. Just like mixing paint to make any colour you wish, varying the amount and intensity of each of the colour pixels creates the desired image.
Groups of bits are formed into larger units called bytes. They are the communication link between the content you are watching and your TV. A modem packages and unpackages this information; at its heart, every TV or cellphone is based on a modem.
The packaged information can be transmitted over the air or sent via fibre or cable, where they come into your TV via a cable box. Streaming TV, a service that has become very popular, takes data from a computer network.
Then it's up to you, the viewer. Your modern digital smart TV has an interface that allows you to control all the functions. Basically, a smart TV is a computer, large monitor and receiver all in one package.
In the future, there will be more merging of the functions of your cellphone and TV. The TV will be a screen for your cellphone, for example. Also expect more virtual reality, augmented reality and ultra-high definition TV.
(This is a PTI story syndicated via The Conversation)<\/em><\/p><\/body>","next_sibling":[{"msid":96043308,"title":"EU countries' stance on AI rules draws criticism from lawmaker, consumer group","entity_type":"ARTICLE","link":"\/news\/eu-countries-stance-on-ai-rules-draws-criticism-from-lawmaker-consumer-group\/96043308","category_name":null,"category_name_seo":"telecomnews"}],"related_content":[{"msid":"95658529","title":"Reality TV stars Todd and Julie Chrisley to be sentenced in tax fraud case","entity_type":"ARTICLE","seopath":"magazines\/panache\/reality-tv-stars-todd-and-julie-chrisley-to-be-sentenced-in-tax-fraud-case","category_name":"Panache","synopsis":"The Chrisleys gained fame with their show 'Chrisley Knows Best', which follows their tight-knit, boisterous family.","thumb":"https:\/\/etimg.etb2bimg.com\/thumb\/img-size-42006\/95658529.cms?width=150&height=112","link":"\/news\/magazines\/panache\/reality-tv-stars-todd-and-julie-chrisley-to-be-sentenced-in-tax-fraud-case\/95658529"},{"msid":"95678539","title":"Zesty 1982 film 'My Favorite Year', a comic salute to TV's golden age, turns 40","entity_type":"ARTICLE","seopath":"magazines\/panache\/zesty-1982-film-my-favorite-year-a-comic-salute-to-tvs-golden-age-turns-40","category_name":"Panache","synopsis":"It paid loving tribute to the original golden age of TV in the mid-20th century.","thumb":"https:\/\/etimg.etb2bimg.com\/thumb\/img-size-44840\/95678539.cms?width=150&height=112","link":"\/news\/magazines\/panache\/zesty-1982-film-my-favorite-year-a-comic-salute-to-tvs-golden-age-turns-40\/95678539"},{"msid":"95525199","title":"'Enjoy the day to the fullest.' Shoaib Malik wishes Sania Mirza on her 36th birthday amid divorce rumours","entity_type":"ARTICLE","seopath":"magazines\/panache\/enjoy-the-day-to-the-fullest-shoaib-malik-wishes-sania-mirza-on-her-36th-birthday-amid-divorce-rumours","category_name":"Panache","synopsis":"The couple will be seen in a new talk show together.","thumb":"https:\/\/etimg.etb2bimg.com\/thumb\/img-size-38008\/95525199.cms?width=150&height=112","link":"\/news\/magazines\/panache\/enjoy-the-day-to-the-fullest-shoaib-malik-wishes-sania-mirza-on-her-36th-birthday-amid-divorce-rumours\/95525199"},{"msid":"95451647","title":"TV actor Siddhaanth Surryavanshi, who starred in 'Kkusum' and 'Kasautii Zindagii Kay', dies at 46 after collapsing in gym","entity_type":"ARTICLE","seopath":"magazines\/panache\/tv-actor-siddhaanth-surryavanshi-who-starred-in-kkusum-kasautii-zindagii-kay-dies-of-heart-attack-at-46","category_name":"Panache","synopsis":"The actor's sudden demise sent shockwaves across the television industry.","thumb":"https:\/\/etimg.etb2bimg.com\/thumb\/img-size-27952\/95451647.cms?width=150&height=112","link":"\/news\/magazines\/panache\/tv-actor-siddhaanth-surryavanshi-who-starred-in-kkusum-kasautii-zindagii-kay-dies-of-heart-attack-at-46\/95451647"},{"msid":"96033611","title":"Television","entity_type":"IMAGES","seopath":"magazines\/panache\/from-bw-screens-to-digital-tv-decoding-the-transformation-of-the-television-set\/television","category_name":"From B&W screens to digital TV: Decoding the transformation of the television set","synopsis":"Viewers didn't have a lot of choice, either. Instead of hundreds of channels to choose from, most cities offered only three or four.","thumb":"https:\/\/etimg.etb2bimg.com\/thumb\/img-size-68530\/96033611.cms?width=150&height=112","link":"\/image\/magazines\/panache\/from-bw-screens-to-digital-tv-decoding-the-transformation-of-the-television-set\/television\/96033611"}],"seoschemas":false,"msid":96043425,"entity_type":"ARTICLE","title":"From B&W screens to digital TV: Decoding the transformation of the television set","synopsis":"During the '50s, TVs were expensive, screens were small and the picture wasn't always crystal clear.","titleseo":"telecomnews\/from-bw-screens-to-digital-tv-decoding-the-transformation-of-the-television-set","status":"ACTIVE","authors":[],"analytics":{"comments":0,"views":373,"shares":0,"engagementtimems":1552000},"Alttitle":{"minfo":""},"artag":"PTI","artdate":"2022-12-07 08:02:14","lastupd":"2022-12-07 08:02:47","breadcrumbTags":["digital TV","digital","radio waves","radio corporation of america","frames modern","antennas early","dvr","tvs","Devices","television"],"secinfo":{"seolocation":"telecomnews\/from-bw-screens-to-digital-tv-decoding-the-transformation-of-the-television-set"}}" data-news_link="//www.iser-br.com/news/from-bw-screens-to-digital-tv-decoding-the-transformation-of-the-television-set/96043425">
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