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HDTV (High Definition Television) and video surveillance Introduction


The TV market is moving rapidly towards high-definition television, HDTV. This change brings truly re- The TV market is moving rapidly towards high-definition television, HDTV. This change brings truly re- nd twice the linear resolution compared with traditional, analog TV. Furthermore, HDTV comes ith wide screen format and DVD-quality audio.


Introduction Introduction


The TV market is moving rapidly towards high-definition television, HDTV. This change brings truly re- markable improvements in image quality and color fidelity. HDTV provides up to five times higher resolu- tion and twice the linear resolution compared with traditional, analog TV. Furthermore, HDTV comes with wide screen format and DVD-quality audio.


markable improvements in image quality and color fidelity. HDTV provides up to five times higher resolu tionmarkable improvements in image quality and color fidelity. HDTV provides up to five times higher resolu- ti won and twice the linear resolution compared with traditional, analog TV. Furthermore, HDTV comes with wide screen format and DVD-quality audio.


Growth in the consumer market for HDTV is impressive. In 2007 the HDTV household penetration in the Growth in the consumer market f


Growth in the consumer market for HDTV is impressive. In 2007 the HDTV household penetration in the U.S. was approximately 35%. According to estimates, 85% of all viewers will have an HDTV set at home by 2012. Already today, virtually all major television productions are HD.


U.S. was approximately 35%. According to estimates, 85% of all viewers will have an HDTV set at home U.S. was approximately 35%. According to stimates, 85% of all viewers will have an HDTV set at home


HDTV is impressive. In 2007 th HDTV household penetration in th


by 2012. Already today, virtually all major television productions are HD. by 2012. Already today, virtually all major television productions are HD.


The two most important HDTV standards today are SMPTE 296M and SMPTE 274M, which are defined The two most important HDTV sta dards today are SMPTE 296M and SMPTE 274M, which are defined


The two most important HDTV standards today are SMPTE 296M and SMPTE 274M, which are defined by the Society of Motion Picture and Television Engineers, SMPTE.


by the Society of Motion Picture and Television Engineers, SMPTE. by the Society of Motion Picture and Television Engineers, SMPTE.


1. 1. 1.


HDTV impact on video surveillance market HDTV impact on video surveillance market HDTV impact on video surveillance market


This development is now starting to have an impact on the video surveillance market, as customers ask This dev lopment is now


This development is now starting to have an impact on the video surveillance market, as customers ask for higher image quality standard. The possibility of clearer, sharper images is a long sought quality in the surveillance industry, i.e. in applications where objects are moving or accurate identification is vital.


for higher image quality standard. The possibility of clearer, sharper images is a long sought quality in for high r image qualit


the surveillance industry, i.e. in applications where objects are moving or accurate identification is vital. the surveillance industry, i.e. in applications where objects are moving or accurate identification is vital. It can be argued that some of these requirements can be met with megapixel network cameras. How- Ietv can be argued that some of these requirements can be met with megapixel network cameras. How- best practices and it refers specifically to the number of image sensor elements of the digital camera. With high resolution follows huge amounts of image data, which more often than not leads to compro- mises on frame rate. A megapixel camera alone is therefore not synonymous with high image quality.


rting to have an impact on th video surveillance market, as customers ask standard. The possibility of clearer, sharper images is a long sought quality in


It can be argued that some of these requirements can be met with megapixel network cameras. How- ever the notion of “megapixel” is not a recognized standard but rather an adaptation of the industry’s best practices and it refers specifically to the number of image sensor elements of the digital camera. With high resolution follows huge amounts of image data, which more often than not leads to compro- mises on frame rate. A megapixel camera alone is therefore not synonymous with high image quality.


er the notion of “megapixel” is not a recognized standard but rather an adaptation of the industry’s ever the notion of “megapixel” is not a recognized standard but rather an adaptation of the industry’s best practices and it refers specifically to the number of image sensor elements of the digi al camera. With high resolution follows huge amounts of image data, which more often than not leads to compro- mises on frame rate. A megapixel camera alone is therefore not synonymous with high image quality. In contrast, a network camera that complies with any of the given HDTV standards is guaranteed to I pn contrast, a network camera that complies with any of the give HDTV standards is guarante d to


In contrast, a network camera that complies with any of the given HDTV standards is guaranteed to provide a certain resolution, frame rate and color fidelity, thereby ensuring video quality at all times.


rovide a certain resolution, frame rate and color fidelity, thereby ensuring video quality at all times. provide a certain resolution, frame rate and color fidelity, thereby ensuring video quality at all times.


2. 2. 2.


Development of HDTV Development of HDTV Development of HDTV


The basic difference between HDTV and traditional analog TV is the number of pixels that make up the image information on each screen. During the second half of the 20th century two different standards dominated the market: PAL and NTSC.


The basic difference between HDTV and traditional analog TV is the number of pixels that make up the image information on each screen. During the second half of the 20th century two different standards dominated the market: PAL and NTSC.


The basic difference between HDTV and traditional analog TV is the number of pixels that make up the image information on each screen. During the second half of the 20th century two different standards dominated the market: PAL and NTSC.


PAL, or Phase Alternating Line, is found in Europe and the greater part of Asia. It is a system with 576 PAL, or Phas Alternating Line, is found in Europe and the greater part of Asia. It is a system with 576 d (fps). North and Central Ameri-


active TV lines (TVL) at 50 Hz and a frame rate of 25 frames per second (fps). North and Central Ameri- active TV ines (TVL) at 50 Hz and a frame rate of 25 frames p r sec broadcasts 480 active TV lines at 60 Hz (30 fps).


High-resolution television can be said to go as far back as 1958. The first to develop a technique that Hi gagh-resolution television can be said to go as far back as 1958. The first to develop a te hniqu that Transformator, was capable of producing an image composed of 1,125 lines of resolution. A decade later the Japanese state broadcaster, NHK, developed the first system for commercial use.


High-resolution television can be said to go as far back as 1958. The first to develop a technique that gave extremely clear and crisp images was the soviet military. Their system for televised conferences, Transformator, was capable of producing an image composed of 1,125 lines of resolution. A decade later the Japanese state broadcaster, NHK, developed the first system for commercial use.


ve extremely clear and crisp images was the soviet military. Their system for televised conferences, gave extremely clear and crisp images w s the soviet military. Their system for televised conferences, Transformator, was capable of producing an image composed of 1,125 lines of resolution. A decade later the Japanese state broadcaster, NHK, developed the first system for commercial use.


The lengthy development process was not related to indifference or lack of public demand. On the con- The lengthy development process was not relat


trary, HDTV and the prospect of vastly improved image quality stirred consumer interest globally. The trary, HDTV and the pr spect of v stly improved image quality stirred consumer interest globally. Th olved: A far more effective compression technique was inevitable to make it possible to broadcast the vast amounts of data that comes with HDTV.


The lengthy development process was not related to indifference or lack of public demand. On the con- trary, HDTV and the prospect of vastly improved image quality stirred consumer interest globally. The industry realized the potential of a rising mass market. But to get there one problem remained to be solved: A far more effective compression technique was inevitable to make it possible to broadcast the vast amounts of data that comes with HDTV.


to indifference or lack of p blic demand. On the con-


industry realized the potential of a rising mass market. But to get there one problem remained to be i sndustry realized the po ential of a rising mass market. But o get there one problem remained to b solved: A far more effective compression technique was inevitable to make it possible to broadcast the vast amounts of data that comes with HDTV.


Experimental HDTV systems in, for example, the U.S. were all rejected because of their high bandwidth Expe imental HDTV syst ms in, for example, the U.S. were all rejected because of their high bandwidth a standard-definition broadcast, making it only possible to distribute by satellite. It soon became evident that a successful HDTV standard required better efficiencies.


Experimental HDTV systems in, for example, the U.S. were all rejected because of their high bandwidth requirements. Typically, early broadcast systems required between two and four times the bandwidth of a standard-definition broadcast, making it only possible to distribute by satellite. It soon became evident that a successful HDTV standard required better efficiencies.


requirements. Typically, early broadcast systems required between two and four times the bandwidth of requirements. Typically, early broadcast systems requir d between two and four times the bandwidth of a standard-definition broadcast, making it only possible to distribute by satellite. It soon became evident that a successful HDTV standard required better efficiencies.


PAL, or Phase Alternating Line, is found in Europe and the greater part of Asia. It is a system with 576 active TV lines (TVL) at 50 Hz and a frame rate of 25 frames per second (fps). North and Central Ameri- ca as well as some parts of Asia opted for NTSC, National Television System Committee. This system broadcasts 480 active TV lines at 60 Hz (30 fps).


ca as well as some parts of Asia opted for NTSC, National Television System Committee. This system ca


s well as some parts of Asia opted for NTSC, National Television System Committee. This system broadcasts 480 active TV lines at 60 Hz (30 fps).


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