Using Intelligent Nodes and Fiber Optics to Control the Next Generation of Digital Television (DTV) Transmitters

1996 ◽  
Author(s):  
Mark A. Aitken ◽  
Gerry Wawrzeniak
Keyword(s):  
Fiber Optics ◽  
Digital Television ◽  
Next Generation

Challenges in DMD™ Assembly and Test

2000 ◽  
Vol 657 ◽  
Author(s):  
S. Joshua Jacobs ◽  
Joshua J. Malone ◽  
Seth A. Miller ◽  
Armando Gonzalez ◽  
Roger Robbins ◽  
...  
Keyword(s):  
Spatial Light Modulator ◽  
Test Equipment ◽  
Digital Television ◽  
Digital Micromirror Device ◽  
Next Generation ◽  
Optical Testing ◽  
Light Modulator ◽  
Current Generation

ABSTRACTThe Digital Micromirror Device™ (DMD™) developed at Texas Instruments is a spatial light modulator composed of 500,000 to 1.3 million movable micromachined aluminum mirrors. The DMD™ serves as the engine for the current generation of computer-driven slide and video projectors, and for next generation devices in digital television and movie projectors. The unique architecture and applications of the device present several packaging and test challenges. This paper provides a description of package humidity modeling and verification testing, as well as an overview of the automated optical testing and test equipment that have been developed to support manufacturing of the DMD™.

Modern Passive Optical Network (PON) Technologies

2011 ◽  
pp. 2689-2697
Author(s):  
Ioannis P. Chochliouros ◽  
Anastasia S. Spiliopoulou
Keyword(s):  
Rapid Development ◽  
Access Networks ◽  
Digital Television ◽  
Next Generation ◽  
Electronic Communications ◽  
Underlying Network ◽  
Global Information Society ◽  
Related Service ◽  
Market Needs ◽  
Bandwidth Demand

Presently, not only the European Union (EU) but the global community faces a decisive priority to “redesign” its economy and society, in order to meet a variety of challenges imposed by the expansion of innovative technological features, in the scope of the new millennium. The rate of investments performed and the rapid development of electronic communications networks-infrastructures, together with all associated facilities in the scope of broadband evolution, create novel major opportunities for the related market sectors (Chochliouros, & Spiliopoulou, 2005). Modern digitalbased technologies make compulsory new requirements for next-generation components and for much wider electronics integration. This critical challenge also raises the issue for considering the “evolution” from current large legacy infrastructures towards new (more convenient) ones, by striking a “balance” between backward compatibility requirements and the need to explore disruptive architectures to appropriately build (and offer) future Internet, broadband, and related service infrastructures. More specifically, for the entire European market a number of evolutionary initiatives, as they currently have been encouraged by the latest EU strategic frameworks, relate first and foremost to the technological expansion and the exploitation of ubiquitous broadband networks, the availability/accessibility of dynamic services platforms, and the offering of “adequate” trust and security, all in the framework of converged and interoperable networked environments (European Commission, 2006). However the global information society cannot deliver its major benefits without a “suitable” and appropriately deployed infrastructure, able to fulfill all requirements for increased bandwidth. During recent years, optics and photonics have become increasingly pervasive in a broad range of applications. Therefore, photonic components and subsystems are nowadays indispensable in multiple application areas, and consequently they constitute concerns of high-strategic importance for many operators. In this critical extent, fiber is constantly becoming an essential priority for wired access, as it can provide excessive bandwidth and additional advantages, if compared to similar alternative options of underlying infrastructures (Agrawal, 2002). There are several market and investment evidences demonstrating that a significant part of next-generation access networks will be based on optical access (Chochliouros, Spiliopoulou, & Lalopoulos, 2005). This is due to the fact that we are presently witnessing an extraordinary expansion in bandwidth demand, mainly driven by the development of sophisticated services/applications, including video-on-demand (VoD), interactive high-definition digital television (HDTV), IPTV, multi-party videoconferencing, and many more. These facilities require both the existence and the use of a “fitting” underlying network infrastructure, capable of supporting high-speed data transmission rates that cannot be fulfilled by the “traditional” copper-based access networks. In fact, market actors are currently focusing on developing and deploying new network infrastructures (Leiping, 2005) that will constitute future-proof solutions in terms of the anticipated worldwide growth in bandwidth demand (reaching a rate of 50% to 100% annually), but at the same time be economically viable (Prat, Balaquer, Gene, Diaz, & Fiquerola, 2002). To this aim, fiberaccess technologies evolve quite rapidly as they can guarantee “infinite” bandwidth opportunities, for all prescribed market needs, either corporate and/or residential.

Key technologies for next-generation terrestrial digital television standard DVB-T2

2009 ◽  
Vol 47 (10) ◽  
pp. 146-153 ◽  
Author(s):  
L. Vangelista ◽  
N. Benvenuto ◽  
S. Tomasin ◽  
C. Nokes ◽  
J. Stott ◽  
...  
Keyword(s):  
Digital Television ◽  
Next Generation ◽  
Key Technologies

The on-line use of histogram data for high-speed correction and alignment of electron microscope images

1984 ◽  
Vol 42 ◽  
pp. 556-557
Author(s):  
William Krakow
Keyword(s):  
Power Spectrum ◽  
High Speed ◽  
Direct Memory Access ◽  
Digital Television ◽  
Contrast Transfer Function ◽  
The Past ◽  
High Resolution Tem ◽  
On Line ◽  
Correction Of Astigmatism ◽  
The Fourier Transform

In the past few years on-line digital television frame store devices coupled to computers have been employed to attempt to measure the microscope parameters of defocus and astigmatism. The ultimate goal of such tasks is to fully adjust the operating parameters of the microscope and obtain an optimum image for viewing in terms of its information content. The initial approach to this problem, for high resolution TEM imaging, was to obtain the power spectrum from the Fourier transform of an image, find the contrast transfer function oscillation maxima, and subsequently correct the image. This technique requires a fast computer, a direct memory access device and even an array processor to accomplish these tasks on limited size arrays in a few seconds per image. It is not clear that the power spectrum could be used for more than defocus correction since the correction of astigmatism is a formidable problem of pattern recognition.

Designing high-resolution slow scan CCD-based TEM camera systems

1992 ◽  
Vol 50 (2) ◽  
pp. 946-947
Author(s):  
James F. Mancuso ◽  
William B. Maxwell ◽  
Russell E. Camp ◽  
Mark H. Ellisman
Keyword(s):  
Fiber Optics ◽  
Ccd Camera ◽  
High Energy ◽  
Phosphor Layer ◽  
X Ray ◽  
Light Production ◽  
Camera Systems ◽  
X Ray Imaging ◽  
Electron Image ◽  
Scintillating Fiber

The imaging requirements for 1000 line CCD camera systems include resolution, sensitivity, and field of view. In electronic camera systems these characteristics are determined primarily by the performance of the electro-optic interface. This component converts the electron image into a light image which is ultimately received by a camera sensor.Light production in the interface occurs when high energy electrons strike a phosphor or scintillator. Resolution is limited by electron scattering and absorption. For a constant resolution, more energy deposition occurs in denser phosphors (Figure 1). In this respect, high density x-ray phosphors such as Gd2O2S are better than ZnS based cathode ray tube phosphors. Scintillating fiber optics can be used instead of a discrete phosphor layer. The resolution of scintillating fiber optics that are used in x-ray imaging exceed 20 1p/mm and can be made very large. An example of a digital TEM image using a scintillating fiber optic plate is shown in Figure 2.

Sign in / Sign up

Export Citation Format

Share Document