This eduGuide is intended for the video professional that is starting to become involved with designing, specifying, operating or maintaining digital video broadcast and distribution systems for HDTV. For over 50 years our industry has used television technology of a primarily analog nature. True, some digital technology has been used in broadcast facilities for standard definition or NTSC and PAL systems, but its deployment has been limited and ultimately converted back to an analog signal for distribution and broadcast.
Today, HDTV is the first broadcast technology designed to be exclusively digital from image capture to display on the consumer’s TV set. Many different technologies are used where the video, and audio, undergoes many transformations from start to finish. This eduGuide will help you to understand the chain of technologies used, the industry standards behind them, for both copper and fiber optic distribution, and the practices video professionals are developing for the new world of HDTV.
The Role of Technical Standards
The broadcast industry, unlike the A/V and computer industries, has historically been a proponent and practitioner of technical standards for video and audio processing and distribution. The reason is simple: interoperability. The broadcaster, and those in related professional video industries, need to be able to select the best equipment for the task at hand. Since all the equipment in a distribution or edit suite will need to process the same video and audio, there is a need to define and adhere to interface standards between the various pieces of equipment.
There are several technical standards organizations in the world that develop and promote these standards but perhaps the most noted is SMPTE. The Society of Motion Picture and Television Engineers (SMPTE) has membership and participation from individuals, broadcasters and equipment manufacturers from around the world. The expertise and experience brought to bear by this group creates a forum for developing very powerful and lasting standards.
The buyer and user of broadcast equipment is the ultimate beneficiary of this process. He can be assured that products compliant with a particular set of standards will allow video and audio signals to be communicated between them in a recognizable way without requiring additional processing or interfacing. The benefit to the user is lower design and operational costs and a wider selection of equipment to choose from for a particular application without being locked in to any one equipment manufacturer employing proprietary interfaces and protocols.
Download pdf HDTV Standards and Practices for Digital Broadcasting
Showing posts with label hdtv standards. Show all posts
Showing posts with label hdtv standards. Show all posts
Sunday, February 22, 2009
Monday, February 9, 2009
hDtV (high Definition television) and video surveillance
The TV market is moving rapidly towards high-definition television, HDTV. This change brings truly remarkable improvements in image quality and color fidelity. HDTV provides up to five times higher resolution 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 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. 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.
hDtV impact on video surveillance market
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. It can be argued that some of these requirements can be met with megapixel network cameras. However 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 compromises 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 provide a certain resolution, frame rate and color fidelity, thereby ensuring video quality at all times.
Get pdf download hDtV (high Definition television) and video surveillance
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. 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.
hDtV impact on video surveillance market
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. It can be argued that some of these requirements can be met with megapixel network cameras. However 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 compromises 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 provide a certain resolution, frame rate and color fidelity, thereby ensuring video quality at all times.
Get pdf download hDtV (high Definition television) and video surveillance
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