HDTV Compressed Digital Video Basics
by Brian Bradshaw
MPEG, or Compressed Digital Video (CDV), is comparable to using MP3 files for music. It makes the file smaller without damaging it, so that it takes less time to download (less bandwidth), and more songs can be stored on your player.
CDV reduces the signal bandwidth requirements of a TV signal to enable its transmission via the Internet, DVD, cable, or satellite. This is necessary because an uncompressed video signal is very large. High definition files are much larger than standard definition files.
* A standard definition DVD movie file size is approximately 3 GB/Hour.
* An uncompressed 1280 X 720 (HDTV) movie file size is over 150 GB/Hour.
* An uncompressed 1920 X 1080 (HDTV) movie file size is over 350 GB/Hour.
* An MPEG-2 (CDV) HDTV movie file size is approximately 9 GB/Hour.
* An MPEG-4 (CDV) HDTV movie file size is approximately 5 GB/Hour.
The early use of CDV (for standard definition programming) was pioneered by the satellite TV companies, DirecTV and the Dish Network.
CDV is the process of discarding data for that information that would be invisible to the viewer. However, too much CDV will significantly distort the output. The higher the level of CDV, the more data that is discarded. Discard too much, and the distortion is very noticeable.
CDV is a tradeoff between file size and video quality. CDV operates on pixel neighborhoods, called a macroblock. The CDV records only the changes within those blocks. This works well if the video is primarily static images like text.
In a basketball game, when Kobe takes it to the basket, more pixels change from one frame to the next. When this happens, the video compression algorithm must work harder. The picture quality after compression depends on the complexity and predictability of the image.
The most common CDV standards are authored by the Moving Picture Experts Group (MPEG). Applying CDV to video is an intensive computer operation, but uncompressing (undoing the CDV) MPEG data to video is much less difficult. A C-Cube real-time MPEG-1 video encoder using 8 custom-designed video processor chips sells for $120,000.
MPEG standards are not owned by anyone. Various companies and researchers have MPEG patents, but one does not have to pay a license fee to use MPEG technology.
DVD and Blu-ray discs have CDV used during the mastering process (Blu-ray has enough disc capacity that the CDV is not aggressive, thus does not add significant distortion). High bitrate video algorithms with little CDV exist for video post-production work, but these still create an enormous file, and for this reason are seldom used for the distribution of video.
There are several MPEG standards being used but only three are in general use for commercial video distribution:
MPEG-1
MPEG-1 was the first widely used video (and audio) CDV standard. MP3 is an abbreviation of "MPEG-1 audio layer 3". MPEG-1 supports a video resolution of 352 x 240 at 30 FPS (frames per second). It is the standard for the CDV of moving pictures (and audio). This standard has roots in CD-ROM video applications, and is a popular for video found on the Internet (.mpg files).
MPEG-2
MPEG-2 can support video resolutions of 720 x 480 and 1280 x 720, at 60 FPS. MPEG-2 is capable for both standard definition TV and HDTV. The MPEG-2 standards is also used to store data on a DVD. This is the algorithm used by DirecTV and the Dish Network.
MPEG-2 is the standard on which Digital Television set top boxes and DVD CDV is based. It is based on MPEG-1, but modified for use by digital broadcast television. Different algorithms have been developed and have been integrated into the standard. MPEG-2 is well suited to HDTV resolution and bit rates. With this technique, CDV can compress video data by 15 to 25 times while still producing a picture quality that is generally considered high quality.
MPEG-4
This standard is the future CDV standard that will almost certainly be used by most services delivering HDTV. This includes AT&T, DirecTV, and the Dish Network. A number of cable operators have also started MPEG-4 trials. This standard was originally designed for the Internet. Individual objects within a scene are tracked separately. This is very efficient.
The move to MPEG-4 by the satellite companies is not designed to improve picture quality, but because this algorithm is much more efficient. An MPEG-2 HDTV channel utilizes the bandwidth of six standard definition TV channels; an MPEG-4 HDTV channel would only consume the bandwidth of three standard definition TV channels. MPEG-4 uses half the bandwidth of MPEG-2, and so your service provider will be able to offer twice the number of channels.
OpenCable Application Platform (OCAP)
Consumers are now able to purchase their own cable box/DVR combos from electronics retailers. OCAP is a way for cable operators and other service providers to deploy interactive services like a PC. This will enable your American Idol voter to cast their vote with the remote control for their TV.
Consumers want their HDTV, and service providers who can supply the programming will thrive. MPEG-4 is the best and most cost-efficient option for cable operators and other service providers.
6/14/2008
4/30/2008
LCD TV - Synthesis of design and technology
LCD TV - Synthesis of design and technology
by Adam Caitlin
The modern day customer is an unsatisfied soul who is ready to pay money for products and services that he desires. The customers are willing to pay a price for gadgets that are high on technology and performance; at the end of the day, a definite improvement in their life styles is all that they would want. One could take the case of LCD television sets to illustrate the point. The television sets having LCD displays have a wider scope in comparison to the traditional TV sets, and more and more people are showing their affinity for the former.The LCD TV works well on a host of high-end innovations and advanced technologies. It uses the Liquid Crystal Display technology for displaying the visual output. As a matter of fact, the LCD technology is based on the properties of polarized light.
The TFT based TV allows the users to enjoy the ultimate viewing experience in terms of --dept reduction, minimized energy consumption and low light. Unlike pre-existing TVs, the LCD screen offers exceptional resolution and contrast ratio that is much in demand among the viewers.Samsung is a well known name in the world of LCD panels. With its advanced screen technology, Samsung models are constantly receiving the positive reviews from all parts of the world. Some of the bestseller models from the Samsung are LN-T4665F, LA 19R71, LA 26R71, LA32S8 and LA 40S8 to name a few. Moreover, these liquid crystal displays can be combined with applications from Microsoft to create a special game mode that optimizes the image quality and sound response time for realistic video game play.
The screens of the LCD TV are high on image resolution and offer crystal-clear displays as well as distortion-free sound transmission. These screen boasts of dynamic high contrast ratio that displays rich black and can capture even the nuances. Not only this, the users are able to enjoy connectivity with all the compatible digital devices. Therefore, it can be said that LCD screens deliver reliable, high-end, and consistent performance-based results to their customers.To conclude, it can be said that LCD TV sets represent an exciting synthesis of design and technology.
by Adam Caitlin
The modern day customer is an unsatisfied soul who is ready to pay money for products and services that he desires. The customers are willing to pay a price for gadgets that are high on technology and performance; at the end of the day, a definite improvement in their life styles is all that they would want. One could take the case of LCD television sets to illustrate the point. The television sets having LCD displays have a wider scope in comparison to the traditional TV sets, and more and more people are showing their affinity for the former.The LCD TV works well on a host of high-end innovations and advanced technologies. It uses the Liquid Crystal Display technology for displaying the visual output. As a matter of fact, the LCD technology is based on the properties of polarized light.
The TFT based TV allows the users to enjoy the ultimate viewing experience in terms of --dept reduction, minimized energy consumption and low light. Unlike pre-existing TVs, the LCD screen offers exceptional resolution and contrast ratio that is much in demand among the viewers.Samsung is a well known name in the world of LCD panels. With its advanced screen technology, Samsung models are constantly receiving the positive reviews from all parts of the world. Some of the bestseller models from the Samsung are LN-T4665F, LA 19R71, LA 26R71, LA32S8 and LA 40S8 to name a few. Moreover, these liquid crystal displays can be combined with applications from Microsoft to create a special game mode that optimizes the image quality and sound response time for realistic video game play.
The screens of the LCD TV are high on image resolution and offer crystal-clear displays as well as distortion-free sound transmission. These screen boasts of dynamic high contrast ratio that displays rich black and can capture even the nuances. Not only this, the users are able to enjoy connectivity with all the compatible digital devices. Therefore, it can be said that LCD screens deliver reliable, high-end, and consistent performance-based results to their customers.To conclude, it can be said that LCD TV sets represent an exciting synthesis of design and technology.
Samsung LCD TV: The unchallenged market ruler
Samsung LCD TV: The unchallenged market ruler
by Raisa Raima
If you are looking for a perfect companion at your home that can relieve you from the tensions of life besides being informative, a television is indeed a good option.
Let us look at some features of a LCD television that set it apart from the traditional television sets. A LCD television is space-conscious and offers a high degree of portability and flexibility. The users can easily access seamless viewing experience by using it. The smart features of a LCD TV such as dynamic contrast ratio, high resolution, viewing angles and image resolution can easily win the hearts of the customers. The emergence of new market players and growing competition have led to a significant reduction in its prices, making it more affordable for the middle and low class customers.
In the present day market, there are numerous television sets from an equal number of manufacturers. The modern day prospective TV customer is a lucky fellow with his needs being completely taken care of. He can easily have complete access to all the latest products and services in the market in an order to get a good deal. The customer can also ask for bargains and the manufacturer will be more than happy to get him as a customer. This is because in the modern day competitive world, a business can expect to prosper only if it can keep a profitable lead from its peers. Some manufacturers feel that it is hard to get a new customer than maintain the list of existing ones.
If you are looking for a high class yet cheap LCD TV, you must make a complete and comprehensive survey of the market. This survey will help you to get access to the "best" deals at the most affordable prices.
Some of the leading names in the world of LCD TV technology are Samsung and Sony. Samsung has been a pioneer when it comes to smart and high-class television sets. The Samsung LA40M8 (Mosel Blaque) is one of the best television sets in the present day market. It has some of the most advanced television features such as wide colour enhancer, super clear panel, amazing picture quality and SRS TruSurround XT technology. This Samsung LCD TV has an exceptionally dynamic contrast ratio with a 178° wide viewing angle. It offers an outstanding picture resolution of 1920 x 1080 pixels.
Now that we have learnt quite a few lessons about the benefits of a LCD television, you can easily view and compare the latest LCD televisions. If in doubt, get your hands on the Samsung LCD TVs and stay happy forever.
by Raisa Raima
If you are looking for a perfect companion at your home that can relieve you from the tensions of life besides being informative, a television is indeed a good option.
Let us look at some features of a LCD television that set it apart from the traditional television sets. A LCD television is space-conscious and offers a high degree of portability and flexibility. The users can easily access seamless viewing experience by using it. The smart features of a LCD TV such as dynamic contrast ratio, high resolution, viewing angles and image resolution can easily win the hearts of the customers. The emergence of new market players and growing competition have led to a significant reduction in its prices, making it more affordable for the middle and low class customers.
In the present day market, there are numerous television sets from an equal number of manufacturers. The modern day prospective TV customer is a lucky fellow with his needs being completely taken care of. He can easily have complete access to all the latest products and services in the market in an order to get a good deal. The customer can also ask for bargains and the manufacturer will be more than happy to get him as a customer. This is because in the modern day competitive world, a business can expect to prosper only if it can keep a profitable lead from its peers. Some manufacturers feel that it is hard to get a new customer than maintain the list of existing ones.
If you are looking for a high class yet cheap LCD TV, you must make a complete and comprehensive survey of the market. This survey will help you to get access to the "best" deals at the most affordable prices.
Some of the leading names in the world of LCD TV technology are Samsung and Sony. Samsung has been a pioneer when it comes to smart and high-class television sets. The Samsung LA40M8 (Mosel Blaque) is one of the best television sets in the present day market. It has some of the most advanced television features such as wide colour enhancer, super clear panel, amazing picture quality and SRS TruSurround XT technology. This Samsung LCD TV has an exceptionally dynamic contrast ratio with a 178° wide viewing angle. It offers an outstanding picture resolution of 1920 x 1080 pixels.
Now that we have learnt quite a few lessons about the benefits of a LCD television, you can easily view and compare the latest LCD televisions. If in doubt, get your hands on the Samsung LCD TVs and stay happy forever.
4/29/2008
Buying A Cantilever TV Wall Bracket
Buying A Cantilever TV Wall Bracket
by Karl Foreman
Buying a cantilever wall mount can be a very easy task, as the ranges available now cover a group of different size TV's. Running on a universal bracket, covers majority of VESA sizes around even non VESA support is available.
Things to check before you buy, the VESA sizes the bracket supports. The size of TV recommended for the bracket, also the most important, the weight the bracket can support.
A cantilever TV wall bracket is a wall mounted TV Wall Bracket, that mounts your flat screen, LCD or Plasma television on a arm.
The arm on the Cantilever TV Wall bracket enables you to position your television to the best viewing point for you and your family, wherever you are in the room.
There are great selections of Cantilever TV wall brackets available from the TV Bracket Range, suitable for flat screen, LCD and Plasma Televisions of all sizes and models.
· The Arm & Tilt Cantilever TV Bracket is suitable for flat screen, LCD and Plasma televisions with a screen size up to 32" with a maximum weight capacity of 30kg!
This arm & tilt Cantilever TV Wall Bracket allows you to extend your flat screen, LCD or Plasma Television up to 9" from the wall, tilting it to 20 degrees and with a rotation of 180 degrees.
As a universal Arm & Tilt Cantilever TV Wall bracket you will find that this bracket is suitable for the majority of branded flat screen, plasma and LCD televisions, this arm and tilt cantilever bracket has a VESA suitability of 50 x 50, 75 x 75 and 100 x 100.
· Another great Cantilever TV Wall bracket is the TWO ARM cantilever Arm mount, this is an ideal TV wall bracket for the smaller size plasma, LCD or Flat screen television and is one of the cheaper models around. The TWO ARM cantilever arm mount is suitable for televisions weighing up to 15kg and suitable for screen sizes up to 16".
Thanks to the two arm design of this Cantilever TV Wall bracket you are able to extend from the wall up to 15", tilting it 20 degrees with a rotation of 270 degrees and a VESA suitability of 50 x 50, 75 x 75 and 100 x 100.
· Have a black flat screen, plasma or LCD television then the Black Double Arm Swivel and Turn Mount is great for televisions with screen sizes from 13 "to 24".
The double arm of the Swivel and Turn mount allows you to extend the television from the wall up to 17", tilt it to 20 degrees and rotate 180 degrees.
The above are just three of the great cantilever TV wall brackets that are available within the TV Bracket Market and all at great prices!
Cantilever wall brackets are available for all brands of TV's such as Sony , Sanyo, Samsung, Bush, Goodmans, Panasonic, LG, Philips, Matsui,Grundig and many more!
Do to manufacturers having to follow the VESA bracket sizes they cannot hold the monopoly with supplying a bracket to only fit a certain TV.
Saving the end user alot of money and more of a veriety available to suit their needs!
by Karl Foreman
Buying a cantilever wall mount can be a very easy task, as the ranges available now cover a group of different size TV's. Running on a universal bracket, covers majority of VESA sizes around even non VESA support is available.
Things to check before you buy, the VESA sizes the bracket supports. The size of TV recommended for the bracket, also the most important, the weight the bracket can support.
A cantilever TV wall bracket is a wall mounted TV Wall Bracket, that mounts your flat screen, LCD or Plasma television on a arm.
The arm on the Cantilever TV Wall bracket enables you to position your television to the best viewing point for you and your family, wherever you are in the room.
There are great selections of Cantilever TV wall brackets available from the TV Bracket Range, suitable for flat screen, LCD and Plasma Televisions of all sizes and models.
· The Arm & Tilt Cantilever TV Bracket is suitable for flat screen, LCD and Plasma televisions with a screen size up to 32" with a maximum weight capacity of 30kg!
This arm & tilt Cantilever TV Wall Bracket allows you to extend your flat screen, LCD or Plasma Television up to 9" from the wall, tilting it to 20 degrees and with a rotation of 180 degrees.
As a universal Arm & Tilt Cantilever TV Wall bracket you will find that this bracket is suitable for the majority of branded flat screen, plasma and LCD televisions, this arm and tilt cantilever bracket has a VESA suitability of 50 x 50, 75 x 75 and 100 x 100.
· Another great Cantilever TV Wall bracket is the TWO ARM cantilever Arm mount, this is an ideal TV wall bracket for the smaller size plasma, LCD or Flat screen television and is one of the cheaper models around. The TWO ARM cantilever arm mount is suitable for televisions weighing up to 15kg and suitable for screen sizes up to 16".
Thanks to the two arm design of this Cantilever TV Wall bracket you are able to extend from the wall up to 15", tilting it 20 degrees with a rotation of 270 degrees and a VESA suitability of 50 x 50, 75 x 75 and 100 x 100.
· Have a black flat screen, plasma or LCD television then the Black Double Arm Swivel and Turn Mount is great for televisions with screen sizes from 13 "to 24".
The double arm of the Swivel and Turn mount allows you to extend the television from the wall up to 17", tilt it to 20 degrees and rotate 180 degrees.
The above are just three of the great cantilever TV wall brackets that are available within the TV Bracket Market and all at great prices!
Cantilever wall brackets are available for all brands of TV's such as Sony , Sanyo, Samsung, Bush, Goodmans, Panasonic, LG, Philips, Matsui,Grundig and many more!
Do to manufacturers having to follow the VESA bracket sizes they cannot hold the monopoly with supplying a bracket to only fit a certain TV.
Saving the end user alot of money and more of a veriety available to suit their needs!
3/28/2008
LCD TV: The New Face Of Indoor Entertainment
LCD TV: The New Face Of Indoor Entertainment
by Roberto Sedycias
New innovations have radically changed the way people around the world perceive the concept of entertainment. Be it cinema or music system, mp3 players or television, people are constantly adopting new ways of entertainment, jettisoning the old ones. Technology changes always. You can`t stop the advancement in technology. There is some advancement in terms of technology in everyday things like cell phones, calculators, computer monitors, and televisions, too.
The latest version of television is Liquid Crystal Display Television or LCD TV. Old model tube (CRT) TVs are large and bulky. They need a lot of space for placing it. During the early 2000`s LCD flat panels started ruling over the television market from the typical CRTs.
LCD TV is a flat screen television which needs less space for placing. They are slim, lighter, and hardly goes beyond 3.5 inch in thickness. They have a very trendy look which draws attention of others. The technology has penetrated our everyday lives. But how does it work? Basically, a very large amount of tiny liquid crystals are held between two electrodes. When a charge is passed between the tiny liquid crystals they react to the change. This reaction emits light which creates an image that we can viewed on the screen of the television.
Usually LCD TVs are cheaper as compared to Plasma models. However, when it comes to large screen size, plasma TV is sold for better prices. If you compare with the CRT tube TVs, then the price is a little higher, no matter the screen size.
The screen lifespan of Plasma and LCD TVs should not be an important way to differentiate them. Plasma TV have a reported half-life of 30,000 to 60,000 hours. While the average tube (CRT) TV set has a half-life of around 25,000 hours. LCD TV can be installed on your own where as you have to depend on an expert to install a plasma TV. The best part of LCD TV is that it draws only about 60% of the power consumed by plasma displays. You are also protected from harmful electromagnetic waves while using it.
LCD TVs have certain minor drawbacks too, with restricted viewing angle and limited contrast ratio. They have graying effects on the screen which deteriorates the clarity of the image, mainly the color factor. The viewing angle of an LCD TV is up to 160 degrees, where as the viewing angle of plasma TV is up to 170 degrees.
The right LCD TV screen placement is a very important point to consider. Sitting the right distance from your TV set optimizes your viewing experience. Also for the viewing height, your eyes should level with the middle of the screen, since the LCD image picture will look its brightest as this level.
LCD TVs may often look better in `real-world` situations, as they reflect very little light, enabling them to keep levels in well-lit rooms. This way, LCD TVs will usually meet the brightness expectations of most customers.
Technology has brought many interesting products in recent years. One of them was the LCD TV. For those who love indoor entertainment, like watching TV, look no further. LCD TV will provide one of the best viewing experiences.
by Roberto Sedycias
New innovations have radically changed the way people around the world perceive the concept of entertainment. Be it cinema or music system, mp3 players or television, people are constantly adopting new ways of entertainment, jettisoning the old ones. Technology changes always. You can`t stop the advancement in technology. There is some advancement in terms of technology in everyday things like cell phones, calculators, computer monitors, and televisions, too.
The latest version of television is Liquid Crystal Display Television or LCD TV. Old model tube (CRT) TVs are large and bulky. They need a lot of space for placing it. During the early 2000`s LCD flat panels started ruling over the television market from the typical CRTs.
LCD TV is a flat screen television which needs less space for placing. They are slim, lighter, and hardly goes beyond 3.5 inch in thickness. They have a very trendy look which draws attention of others. The technology has penetrated our everyday lives. But how does it work? Basically, a very large amount of tiny liquid crystals are held between two electrodes. When a charge is passed between the tiny liquid crystals they react to the change. This reaction emits light which creates an image that we can viewed on the screen of the television.
Usually LCD TVs are cheaper as compared to Plasma models. However, when it comes to large screen size, plasma TV is sold for better prices. If you compare with the CRT tube TVs, then the price is a little higher, no matter the screen size.
The screen lifespan of Plasma and LCD TVs should not be an important way to differentiate them. Plasma TV have a reported half-life of 30,000 to 60,000 hours. While the average tube (CRT) TV set has a half-life of around 25,000 hours. LCD TV can be installed on your own where as you have to depend on an expert to install a plasma TV. The best part of LCD TV is that it draws only about 60% of the power consumed by plasma displays. You are also protected from harmful electromagnetic waves while using it.
LCD TVs have certain minor drawbacks too, with restricted viewing angle and limited contrast ratio. They have graying effects on the screen which deteriorates the clarity of the image, mainly the color factor. The viewing angle of an LCD TV is up to 160 degrees, where as the viewing angle of plasma TV is up to 170 degrees.
The right LCD TV screen placement is a very important point to consider. Sitting the right distance from your TV set optimizes your viewing experience. Also for the viewing height, your eyes should level with the middle of the screen, since the LCD image picture will look its brightest as this level.
LCD TVs may often look better in `real-world` situations, as they reflect very little light, enabling them to keep levels in well-lit rooms. This way, LCD TVs will usually meet the brightness expectations of most customers.
Technology has brought many interesting products in recent years. One of them was the LCD TV. For those who love indoor entertainment, like watching TV, look no further. LCD TV will provide one of the best viewing experiences.
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