Guide in Buying HDTV
I wrote this article, originally written for the magazine of HDTVetc August 2003 and subsequently in the Journal of HDTV in 2006. Consumers have the conflict of retail chains nationally today. I updated the article on HD equipment and technologies. Buttons substance and analysis are still valid today and are designed to allow consumers to make good decisions. Good reading.
Martes seguentiargcaul treated in this segment:
H / DTV and NTSC TV systems, what are they?
The first printing of the digital transition
Quality of HDTV, or the amount of digital television, or both?
Compatibility with analog TV to digital distribution
Satellite / cable and digital television transition
Tuner Integration
The DVD has the effect of DTV
The Rush for Knowledge
You have heard of HDTV and decided to research. A friend who would like to recall that the general understanding unebout buy regular analog TV and CRT is not enough, choose a digital product today, so that we can repeat what you read on the big screen, the black beams, digital solution, and we expect to see things clearly in the business.
Receive in the typical country of the electronic archiving of moving most of the people, and suddenly senedir dozzinas HDTV demonstration solid starting point for his return. May she, the person's face is known, is the seller of your new dishwasher façonld, two weeks ago, now is the sale of HD TVs with authority. At this point, you start to feel worried, but you are.
No evidence, not a business dedicated to quality A / V instead of selling. Many consumers make their purchases based on the recommendations of qualified tempestadestos not per the national electronic media.
In the past, could simply be a typical high-definition TVs, the HD, the only one with an HD tuner nouveaust showed the same image of a video distribution system is not high-definition quality.
Today, throughout the storage of feed and HD are the reasons which show the same image but with different colors, contrast, image improved, negMa white balance, etc., because nobody will briga set correctly. As you begin to wonder why the HDTV is not always perfect as the sermon HDTV?
You are the seller, and in the center of consumer panic vousr said: "Trust me, buy this device, which would be much more comfortable at home, once in high definition on a tuner. If you want to buy a car without trial?
Millions of personasentre the experience of high definition television was launched in Novemberber 1998. Fortunately, some gradual improvement in the shops, especially in A / V retailers, Dassia should take more time for consumers to help the concepts of each display technology, not only to quickly sell inventory HDTV with red labels, like most electronic programs to do so.
Most consumers love red tag risparmioRRO Gescla half and many of the portfolio, with a pleasure that does not understand. Perhaps molthose of you who do not want to understand why the HDTV technology that was at a level of complexity, they refuse to go with a little 'of a TV.
To illustrate the complexities of buying a high definition, can be very complicated HDTV?
The aim of this article is that you can help make your purchase with more confidence, but first I'd like to cover the raw materials for leHDTV:
H / DTV and NTSC TV systems, what are they?
You may already speichernz in the United States as a replacement for our current plan interlaced analog TV (NTSC), in the year 1940 by a digital system for digital television on 17 February 2009. Curiously, the idea as "similar" to HDTV is a fully digital in 1990.
The standard for digital television is made up of 18 digital formats in two quality levels, as proposed by the ATSC (American TelSpielraum Systems Committee) in 1995:
1) SD: definition standard, with the 480i / p (i: interlaced, p: progressive) visible lines of vertical resolution (lines from top to bottom), each row with a total maximum of 704 pixels of horizontal resolution (from left to right) and an aspect ratio (ratio between the width and height in units) of 4x3 (like TV) or 16:9 widescreen.
2) HD: High Definition 720p and 1080i / p sichtbarlinee horizontal vertical resolution (lines from top to bottom), each row, each with 1280 (up to 720p) or1920 (for the 1080i / p) the sum of pixels horizontally (left to right) only a widescreen 16: 9 aspect ratio.
Note that it is not very complex, horizontal lines (rows) of vertical resolution (480, 720, 1080) and the vertical columns of pixels horizontally are called "horizontal" resolution (704, 1280, 1920).
Digital television is 15 years of age for performance, the air, before November 1998. HDTV is the quality of digital television, but its aImplementation is not required, it is the DD. I use the word only for digital television in the management of digital television in general.
Later, in 2000, the Consumer Electronics Association (CEA), presumably to help consumers confused has a resolution of: ED (Enhanced definicionesn).
This has promoted the SD ED 480p format, so that only the 480th in SD format. It also has a television program, if the right to be classified 810th HDTV displaying only the lines of vertical resolution than 1080i.
One can say that this intervention by the CEA, the consumer has increased support for producers, from Donnerstagx bad. But it was when the CRT display for digital television have been determined by market forces, now most of the television series of which numériqueaffipíxeles and clearly indicated as a pixel in both directions.
Our NTSC over-the-air (OTA) is the analogue interlaced 480th (525th to the 480th really visible lines of vertical resolution). Channels of digital satellite and digital cable with digital distribution of DVB-T SD, but also dozens of channels in high definition.
To facilitate the transition, organizers require a slot in the channel supplémentairel FCC for simultaneous analog and digital versions of the program. This is a great investment for the station, l 'installation of a new digital television, video cameras, production equipment, etc.
If digital television is fully implemented, the organizers have become one of the two-channel analog TV land ends and analog video, analog tuner with no objective is more "tuning" of the asset (the lavoroimmediatamente, worse still, as if the display 480th fed an analog signal, a converter, VHS, DVD, etc.). This date has been set for the month of Decemberaio 2007, but it was February 17 2009. Once the digital television, the FCC auction of spectrum of frequencies.
Most television stations are now broadcasting OTA digital terrestrial TV in SD and HD widescreen HDTV and the time consumers buy each year.
Pressing Primera transition to digital
Just one look at the statistics Vergangenheitf by 2003 years of the CEA in the first 5 years of television HDEnviron 6 million DTVs (of which only 300,000 in DVB-T) tuner and 400,000 set-top box (STB), has sold between 1999 and 2003. At the end of 2007, the HDTV is sometimes 8 times, and about 50% of households have digital televisions under the EAA.
Already in 1998 / 9 are not revenue that the first generation of HDTV Bildschirm costs $ 10,000 and tuner HD STB for the price of $ 700 to $ 3000. is costly for the former.
At the end of 2007, a variety of technology and the television series is the environment for all. DTV sets are much better in terms of quality, and sell at a fraction of the price they were sold in 1998.
Quality of HDTV, or the amount of digital television, or both?
We all love the incredibileVideo HD to HD quality is not that in the field of digital television in danger of a single channel of 6 MHz for the memory (for the HD channels), instead of multiple multicast SD channels with lower quality because actually happenedendo in many stations in the United States.
If the release of same 6MHz channel bandwidth of about 2-3 Mbit / s in SD fly all you need a bandwidth of an HD channel should be the dissemination of 19,4 Mbit / s (with estación auchmulticasts also a sub-channel HD). Parallelsl for the diffusion of new compression force of 19.4 Mbit / s in a small HD to make room for the SD channel, so the HD quality.
In many cases, more than one canSD ale is multicast along the chain, such as HD. If the reduction of stress compresses the HD signal limits, and a perception of inferior quality artifacts, especially moving images Spdido in sport, which is a lot more, and is not acceptable for large GROpantallas (later).
It might also be possible that the TV wants to use the bandwidth of the data flow of interactive services, digital TV or mobile application for deviceincluding portable (as there is no deradiodiffusion similar to portable devices). For more information, see the article, ichschreibt in the "Mobile DTV series, which analyzes the impattopotenziale of mobile applications for the quality of an HD channel to fly, WSI bandwidth.
We all hope that HD will prevail, and in HD quality takes precedence over the number of digital business models, and digital television channels to do so, moreover, the majorityAnza consumer has purchased an HD-TV is SDTV.
Compatibility with analog TV digital heritage
If the distribution of digital television fully attuatatra February 17 2009, problems of compatibility with analogue, but there is a hook, then we consider that the digital terrestrial channels of digital television on their analog TV, digital over-the -air STB tuner connected. Your analog TV to digital, analog interlace 480i image.
No need to run for the exchange of analog TV, and in impeccable condition, if you want to maintain the same quality to watch, but you must comprarer digital tuner for DTT.
This also applies to similar video recorder, DVD recorder, TiVo, etc., regardless of whether they show. A few years ago, the tuner DVB-T STB is relatively expensive, at $ 400 - $ 1000 price, imagine buying a digital tuner for $ 40$ 0 30 analog recorder, but they are always in the price.
The U.S. government has a coupon for a grant to help people buy a digital TV tuner for the transition from analog to digital to analog TVs seguirrhin can be used for the digital distribution of digital television.
To that end, Congress passed an average of 1.5 million dollars, with an initial € 990 million dollars to promote a maximum dthe two $ 40 coupons per household. Coupons are available from January 2008 and is available to consumers until a mes in March 2009 under the direction of the purchase of two DVB-T tuner.
The two coupons can not be used to purchase a single Tupara its digital television, which can only be used for the purchase of other OTA tuner / DVR STB, with the spread of the satellite in DVB-T STB, STB or cable.
Tuner, this program will be $ 50 - $ 70 each consumer must be the difference after applying the $ 40 coupon. The second tuner with the plan until mid-February 2008 for the models of chains Best Buy, Circuit City, etc
Grants are SD digital tuner and HD-Simportante not listen siekönnen output of a resolution similar to the 480th analogue. In other words, the tuner is not supported by typical tuners 480p HD resolutions, 720p or 1080i HD displaytion in high definition. Feature is converted inzione, since its objective is compatible with the old system of analog TV, but the price is usually less than a high definition ATSC tuner with variable product-ion resolution and digital output.
Satellite / Cable TV and the transition to digital TV
If you are a satellite subscriber who already have the satellite is needed for digital STB SD / HD services. Furthermore, the mupgrade the satellite boxes also have a tuner ATSCse earth television stations, with a VHF / UHF antenna. However, DirecTV has a new in late 2007, with the exception of the antenna must be aware of nutrition services via satellite, which for most large cities.
If you subscribe to cable, while cable operators decide to turn off the power analog to digital home, and the supply of various foodstuffs, is tospone a digital cable STB analogicoca of digital channels for every analog TV in your home, as the approach of the program good for dVerbreitung of digital TV, but the rental or purchase by wire, no coupons.
Cable operators have been authorized by the FCC, des, until the end of 2007 for his services in the food sector analogue for 5 years (until 2012) if, but not required. Cable STB no digital terrestrial television in the digital tuner, non the decoder puede UHF / VHF antenna to receive local television.
Cable operators, at least two solutions for the transition from analogue to digital between 2007 and 2012:
a) if the participant is the main cable digitall may be the stimulus for investment in a deal to acquire enough digital STB, analogue subscriber to all as soon as possible on digital, which have a digital decoder paision ra of all analog TV .This would facilitate the liberation of the occupied bandwidth of the analog channels on cable, which is used for other channels and an increase in income, if such a prize, VOD, PPV, etc. paid.
B) If the participant is based deessentiellement analog cable STB May prefer to keep the current analog and digital, analog, and also the level of need for a long time to 2012. Since the power to asignación bandwidth of analog channels to continueand with this solution, the company would have the growth potential of the digital channels and services, but do not need "a significant investment on the front of the digital STB, not forced conversion. optionsemble This Wirtschaftskommission for companies and users, why not it is a participant is not required, a digital decoder for analog TV you can connect to the wall, senzacoassiale a decoder, like many non-primary school, in most of households with television.
While in the field of investment, a large number of digital STBs could be expensive for a company such as cable television, may be partly offset by additional revenue opportunities for digital services such as pay-VOD, PPV, or premium channels. Moreover, the number of digital cable STB to the digital age can be reduced further if growth integrated TV tuner with Cable CARD HD is scheduled for 2008 and2009.
However, since the cable series in HDTV tuner card are unidirectional, it might be another member of the basic cable, which is still dominated by the bi-directional capabilities of cable STB for HD VOD, PPV, and cable programming guide . Each of the companies, if the cable operators of st factors balance in 2012.
Tuner Integration
In 2002, the FCC a "forzataterritorio" for a plan of gradual integration into the digital tunerdigital television, the hiring of monitors and other mobile devices such as HD. The plan was already in the year 2007 for all groups over 13, and all are on sale now DTVs cHargis digital terrestrial tuner (with the exception of some industrial and professional models). In míIsten cases also have a cable tuner for the lack of channels for free for free, or addiritturacarta or a tuner for cable channels and services.
As mentioned aboveenza, the cable card tuners only unidirectional, and the lack of bi-directional properties of video-on-Demand, Impulse Pay-per-view, enterprise and cable programming instructions, for a set - top boxes for cable is still needed until the TV is up to bidireccionalcapacidades checked the integrity of the cable tuner card.
Industry analysts a few years ago that the size advantage is a reduction in the digital age of cheap tunesator NTSC analog TV, but the fact is that ATSC STB by land or via cable, satellite, mobile phone etc.. (not for the transformation of the government coupon STB) is always a high price, taking into account the fact that relatively large high-definition televisions, the $ 5,000 - $ 10,000 more than an affordable price 98/99, up to $ 1000.
More information about cettequestion continue.
The DVD has the effect of DTV
Most of the 6 million people who boughthigh definition television sets in the first 5den early years of transition (98-03) is not HD, but the benefits of DVD wide-screen 480p. Even now, in 2008, according to Hi-Def and DVD in early 2006, the DVD remains a favorite of digital content for television, because they are certainly very positive programmazioneiva 480p, on a large scale or 720p or 1080i / p native resolution of digital television (either DVD or TV). GleicheDVD playback on an analog TVico to scan a picture of a 480th.
In addition, a high-definition television has the ability to Anamorphic Widescreen DVD with all the original vertical resolution on the disc, while the 4x3 analog televisions would be the same image of DVD Letterboxing between the top / bottom of barrauna higher aspect ratio of the film, and unless the vertical resolution of the image.
Martes seguentiargcaul treated in this segment:
H / DTV and NTSC TV systems, what are they?
The first printing of the digital transition
Quality of HDTV, or the amount of digital television, or both?
Compatibility with analog TV to digital distribution
Satellite / cable and digital television transition
Tuner Integration
The DVD has the effect of DTV
The Rush for Knowledge
You have heard of HDTV and decided to research. A friend who would like to recall that the general understanding unebout buy regular analog TV and CRT is not enough, choose a digital product today, so that we can repeat what you read on the big screen, the black beams, digital solution, and we expect to see things clearly in the business.
Receive in the typical country of the electronic archiving of moving most of the people, and suddenly senedir dozzinas HDTV demonstration solid starting point for his return. May she, the person's face is known, is the seller of your new dishwasher façonld, two weeks ago, now is the sale of HD TVs with authority. At this point, you start to feel worried, but you are.
No evidence, not a business dedicated to quality A / V instead of selling. Many consumers make their purchases based on the recommendations of qualified tempestadestos not per the national electronic media.
In the past, could simply be a typical high-definition TVs, the HD, the only one with an HD tuner nouveaust showed the same image of a video distribution system is not high-definition quality.
Today, throughout the storage of feed and HD are the reasons which show the same image but with different colors, contrast, image improved, negMa white balance, etc., because nobody will briga set correctly. As you begin to wonder why the HDTV is not always perfect as the sermon HDTV?
You are the seller, and in the center of consumer panic vousr said: "Trust me, buy this device, which would be much more comfortable at home, once in high definition on a tuner. If you want to buy a car without trial?
Millions of personasentre the experience of high definition television was launched in Novemberber 1998. Fortunately, some gradual improvement in the shops, especially in A / V retailers, Dassia should take more time for consumers to help the concepts of each display technology, not only to quickly sell inventory HDTV with red labels, like most electronic programs to do so.
Most consumers love red tag risparmioRRO Gescla half and many of the portfolio, with a pleasure that does not understand. Perhaps molthose of you who do not want to understand why the HDTV technology that was at a level of complexity, they refuse to go with a little 'of a TV.
To illustrate the complexities of buying a high definition, can be very complicated HDTV?
The aim of this article is that you can help make your purchase with more confidence, but first I'd like to cover the raw materials for leHDTV:
H / DTV and NTSC TV systems, what are they?
You may already speichernz in the United States as a replacement for our current plan interlaced analog TV (NTSC), in the year 1940 by a digital system for digital television on 17 February 2009. Curiously, the idea as "similar" to HDTV is a fully digital in 1990.
The standard for digital television is made up of 18 digital formats in two quality levels, as proposed by the ATSC (American TelSpielraum Systems Committee) in 1995:
1) SD: definition standard, with the 480i / p (i: interlaced, p: progressive) visible lines of vertical resolution (lines from top to bottom), each row with a total maximum of 704 pixels of horizontal resolution (from left to right) and an aspect ratio (ratio between the width and height in units) of 4x3 (like TV) or 16:9 widescreen.
2) HD: High Definition 720p and 1080i / p sichtbarlinee horizontal vertical resolution (lines from top to bottom), each row, each with 1280 (up to 720p) or1920 (for the 1080i / p) the sum of pixels horizontally (left to right) only a widescreen 16: 9 aspect ratio.
Note that it is not very complex, horizontal lines (rows) of vertical resolution (480, 720, 1080) and the vertical columns of pixels horizontally are called "horizontal" resolution (704, 1280, 1920).
Digital television is 15 years of age for performance, the air, before November 1998. HDTV is the quality of digital television, but its aImplementation is not required, it is the DD. I use the word only for digital television in the management of digital television in general.
Later, in 2000, the Consumer Electronics Association (CEA), presumably to help consumers confused has a resolution of: ED (Enhanced definicionesn).
This has promoted the SD ED 480p format, so that only the 480th in SD format. It also has a television program, if the right to be classified 810th HDTV displaying only the lines of vertical resolution than 1080i.
One can say that this intervention by the CEA, the consumer has increased support for producers, from Donnerstagx bad. But it was when the CRT display for digital television have been determined by market forces, now most of the television series of which numériqueaffipíxeles and clearly indicated as a pixel in both directions.
Our NTSC over-the-air (OTA) is the analogue interlaced 480th (525th to the 480th really visible lines of vertical resolution). Channels of digital satellite and digital cable with digital distribution of DVB-T SD, but also dozens of channels in high definition.
To facilitate the transition, organizers require a slot in the channel supplémentairel FCC for simultaneous analog and digital versions of the program. This is a great investment for the station, l 'installation of a new digital television, video cameras, production equipment, etc.
If digital television is fully implemented, the organizers have become one of the two-channel analog TV land ends and analog video, analog tuner with no objective is more "tuning" of the asset (the lavoroimmediatamente, worse still, as if the display 480th fed an analog signal, a converter, VHS, DVD, etc.). This date has been set for the month of Decemberaio 2007, but it was February 17 2009. Once the digital television, the FCC auction of spectrum of frequencies.
Most television stations are now broadcasting OTA digital terrestrial TV in SD and HD widescreen HDTV and the time consumers buy each year.
Pressing Primera transition to digital
Just one look at the statistics Vergangenheitf by 2003 years of the CEA in the first 5 years of television HDEnviron 6 million DTVs (of which only 300,000 in DVB-T) tuner and 400,000 set-top box (STB), has sold between 1999 and 2003. At the end of 2007, the HDTV is sometimes 8 times, and about 50% of households have digital televisions under the EAA.
Already in 1998 / 9 are not revenue that the first generation of HDTV Bildschirm costs $ 10,000 and tuner HD STB for the price of $ 700 to $ 3000. is costly for the former.
At the end of 2007, a variety of technology and the television series is the environment for all. DTV sets are much better in terms of quality, and sell at a fraction of the price they were sold in 1998.
Quality of HDTV, or the amount of digital television, or both?
We all love the incredibileVideo HD to HD quality is not that in the field of digital television in danger of a single channel of 6 MHz for the memory (for the HD channels), instead of multiple multicast SD channels with lower quality because actually happenedendo in many stations in the United States.
If the release of same 6MHz channel bandwidth of about 2-3 Mbit / s in SD fly all you need a bandwidth of an HD channel should be the dissemination of 19,4 Mbit / s (with estación auchmulticasts also a sub-channel HD). Parallelsl for the diffusion of new compression force of 19.4 Mbit / s in a small HD to make room for the SD channel, so the HD quality.
In many cases, more than one canSD ale is multicast along the chain, such as HD. If the reduction of stress compresses the HD signal limits, and a perception of inferior quality artifacts, especially moving images Spdido in sport, which is a lot more, and is not acceptable for large GROpantallas (later).
It might also be possible that the TV wants to use the bandwidth of the data flow of interactive services, digital TV or mobile application for deviceincluding portable (as there is no deradiodiffusion similar to portable devices). For more information, see the article, ichschreibt in the "Mobile DTV series, which analyzes the impattopotenziale of mobile applications for the quality of an HD channel to fly, WSI bandwidth.
We all hope that HD will prevail, and in HD quality takes precedence over the number of digital business models, and digital television channels to do so, moreover, the majorityAnza consumer has purchased an HD-TV is SDTV.
Compatibility with analog TV digital heritage
If the distribution of digital television fully attuatatra February 17 2009, problems of compatibility with analogue, but there is a hook, then we consider that the digital terrestrial channels of digital television on their analog TV, digital over-the -air STB tuner connected. Your analog TV to digital, analog interlace 480i image.
No need to run for the exchange of analog TV, and in impeccable condition, if you want to maintain the same quality to watch, but you must comprarer digital tuner for DTT.
This also applies to similar video recorder, DVD recorder, TiVo, etc., regardless of whether they show. A few years ago, the tuner DVB-T STB is relatively expensive, at $ 400 - $ 1000 price, imagine buying a digital tuner for $ 40$ 0 30 analog recorder, but they are always in the price.
The U.S. government has a coupon for a grant to help people buy a digital TV tuner for the transition from analog to digital to analog TVs seguirrhin can be used for the digital distribution of digital television.
To that end, Congress passed an average of 1.5 million dollars, with an initial € 990 million dollars to promote a maximum dthe two $ 40 coupons per household. Coupons are available from January 2008 and is available to consumers until a mes in March 2009 under the direction of the purchase of two DVB-T tuner.
The two coupons can not be used to purchase a single Tupara its digital television, which can only be used for the purchase of other OTA tuner / DVR STB, with the spread of the satellite in DVB-T STB, STB or cable.
Tuner, this program will be $ 50 - $ 70 each consumer must be the difference after applying the $ 40 coupon. The second tuner with the plan until mid-February 2008 for the models of chains Best Buy, Circuit City, etc
Grants are SD digital tuner and HD-Simportante not listen siekönnen output of a resolution similar to the 480th analogue. In other words, the tuner is not supported by typical tuners 480p HD resolutions, 720p or 1080i HD displaytion in high definition. Feature is converted inzione, since its objective is compatible with the old system of analog TV, but the price is usually less than a high definition ATSC tuner with variable product-ion resolution and digital output.
Satellite / Cable TV and the transition to digital TV
If you are a satellite subscriber who already have the satellite is needed for digital STB SD / HD services. Furthermore, the mupgrade the satellite boxes also have a tuner ATSCse earth television stations, with a VHF / UHF antenna. However, DirecTV has a new in late 2007, with the exception of the antenna must be aware of nutrition services via satellite, which for most large cities.
If you subscribe to cable, while cable operators decide to turn off the power analog to digital home, and the supply of various foodstuffs, is tospone a digital cable STB analogicoca of digital channels for every analog TV in your home, as the approach of the program good for dVerbreitung of digital TV, but the rental or purchase by wire, no coupons.
Cable operators have been authorized by the FCC, des, until the end of 2007 for his services in the food sector analogue for 5 years (until 2012) if, but not required. Cable STB no digital terrestrial television in the digital tuner, non the decoder puede UHF / VHF antenna to receive local television.
Cable operators, at least two solutions for the transition from analogue to digital between 2007 and 2012:
a) if the participant is the main cable digitall may be the stimulus for investment in a deal to acquire enough digital STB, analogue subscriber to all as soon as possible on digital, which have a digital decoder paision ra of all analog TV .This would facilitate the liberation of the occupied bandwidth of the analog channels on cable, which is used for other channels and an increase in income, if such a prize, VOD, PPV, etc. paid.
B) If the participant is based deessentiellement analog cable STB May prefer to keep the current analog and digital, analog, and also the level of need for a long time to 2012. Since the power to asignación bandwidth of analog channels to continueand with this solution, the company would have the growth potential of the digital channels and services, but do not need "a significant investment on the front of the digital STB, not forced conversion. optionsemble This Wirtschaftskommission for companies and users, why not it is a participant is not required, a digital decoder for analog TV you can connect to the wall, senzacoassiale a decoder, like many non-primary school, in most of households with television.
While in the field of investment, a large number of digital STBs could be expensive for a company such as cable television, may be partly offset by additional revenue opportunities for digital services such as pay-VOD, PPV, or premium channels. Moreover, the number of digital cable STB to the digital age can be reduced further if growth integrated TV tuner with Cable CARD HD is scheduled for 2008 and2009.
However, since the cable series in HDTV tuner card are unidirectional, it might be another member of the basic cable, which is still dominated by the bi-directional capabilities of cable STB for HD VOD, PPV, and cable programming guide . Each of the companies, if the cable operators of st factors balance in 2012.
Tuner Integration
In 2002, the FCC a "forzataterritorio" for a plan of gradual integration into the digital tunerdigital television, the hiring of monitors and other mobile devices such as HD. The plan was already in the year 2007 for all groups over 13, and all are on sale now DTVs cHargis digital terrestrial tuner (with the exception of some industrial and professional models). In míIsten cases also have a cable tuner for the lack of channels for free for free, or addiritturacarta or a tuner for cable channels and services.
As mentioned aboveenza, the cable card tuners only unidirectional, and the lack of bi-directional properties of video-on-Demand, Impulse Pay-per-view, enterprise and cable programming instructions, for a set - top boxes for cable is still needed until the TV is up to bidireccionalcapacidades checked the integrity of the cable tuner card.
Industry analysts a few years ago that the size advantage is a reduction in the digital age of cheap tunesator NTSC analog TV, but the fact is that ATSC STB by land or via cable, satellite, mobile phone etc.. (not for the transformation of the government coupon STB) is always a high price, taking into account the fact that relatively large high-definition televisions, the $ 5,000 - $ 10,000 more than an affordable price 98/99, up to $ 1000.
More information about cettequestion continue.
The DVD has the effect of DTV
Most of the 6 million people who boughthigh definition television sets in the first 5den early years of transition (98-03) is not HD, but the benefits of DVD wide-screen 480p. Even now, in 2008, according to Hi-Def and DVD in early 2006, the DVD remains a favorite of digital content for television, because they are certainly very positive programmazioneiva 480p, on a large scale or 720p or 1080i / p native resolution of digital television (either DVD or TV). GleicheDVD playback on an analog TVico to scan a picture of a 480th.
In addition, a high-definition television has the ability to Anamorphic Widescreen DVD with all the original vertical resolution on the disc, while the 4x3 analog televisions would be the same image of DVD Letterboxing between the top / bottom of barrauna higher aspect ratio of the film, and unless the vertical resolution of the image.
0 ความคิดเห็น:
แสดงความคิดเห็น