3-D TELEVISION

TV plays an important role in our daily life. There are many types of TVs available in the market like LCD, PLASMA, and LED. Now the CRT TVs are almost vanished from the market because of the arrival of new technology TVs like LCD. Here we can discuss about 3D TELEVISIONS

Three-dimensional images are expected jump out of movie theaters and into living rooms by next year. Sony and Panasonic say they will release home 3-D television systems in 2010; Mitsubishi and JVC are reported to be working on similar products. "TV finally becomes real" in three dimensions, said Robert Perry, an executive vice president at Panasonic. "You're in it. It's the next frontier." Perry compared the 3-D transition to the switch from black-and-white to color television and the shift from standard- to high-definition images.

ESPN is test-recording some sporting events in 3-D, using cameras with two sets of lenses, which would make football players appear to jump out of home television screens during live 3-D broadcasts. And, although television makers haven't released specifics, the price of 3-D TV -- which requires a new television, broadcasting content and 3-D glasses -- is not expected to be substantially higher than some high-definition televisions on the market now. Still, there are skeptics who say that 3-D is not ready for prime-time home viewing. There are concerns that 3-D broadcasts, which require twice the data, will gobble up an unworkable amount of television bandwidth. And some worry that 3-D glasses and graphics won't make a smooth transition to American living rooms. Shane Sturgeon, publisher of HDTV Magazine, said some of the glasses give him a headache and will block some people from buying the new technology. "From what I've seen from most of the manufacturers, it's just not there yet," he said of 3-D TV technology. "I think right now, the technology -- whether you're talking about the refresh rate or the strobing or the glasses -- there are too many things right now that get in the way of enjoyment of the film for it to kick off." All 3-D technology relies on the idea that if separate images are presented to the left and right eyes, the human brain will combine them and create the illusion of a third dimension.

TV makers go about this in different ways, though. Panasonic and Sony, which demonstrated their products for CNN at a recent tech expo in Atlanta, Georgia, use "active glasses" and TVs with high refresh rates to achieve the effect. Two images, one for the right eye and one for the left eye, alternate quickly on the TV. Shutters on the 3-D glasses swap the viewer's vision from right eye to left eye at the same rate: 120 hertz, or 240 hertz for the images together. The TV connects with the glasses through a sensor that's placed between the lenses on the glasses. "It's like a little Venetian blind: open, close, open, close, open, close," John Wyckoff, a Sony content manager, said of the glasses. The effect moves so quickly that it tricks the brain into merging the images and creates the perspective needed to see images in 3-D, he said. Glance away from the TV, though, and you can see the lenses opening and closing, which irritates some people. Those who saw the technology at the recent Custom Electronic Design and Installation Association Expo seemed wowed by Panasonic's 3-D footage of Olympic events and skiers who appeared to send snow flying into the laps of the audience. David Lesch fidgeted with his 3-D glasses during Panasonic's demo but said the 3-D picture on the company's 103-inch plasma screen was excellent. However, it may not be effective for all TV programming, he said. "I cannot imagine that I will watch CNN in 3-D," said Lesch, sales director at AV Media, which sells electronics. "But for sports, yes. To watch soccer and ice hockey -- anything -- that would be great." These next-generation televisions would be able to play shows in 2-D or 3-D. They also would be able to show video games in 3-D, which Sony demonstrated at the expo in Atlanta. Sturgeon, of HDTV Magazine, said JVC is working on a type of 3-D technology that's different form the strobing glasses used by Panasonic and Sony. JVC's version uses polarized glasses to separate the right-eye image from the left-eye image and is more pleasing to the eye, he said. Aside from the kooky glasses, people who want to watch television that jumps off the screen will need something to watch. The process of making live television work in 3-D probably would involve a major conversion of broadcast equipment. Also, Blu-ray is said to be working on a product that would play three-dimensional movies at home. Panasonic and Sony said they're still working out some kinks in their 3-D entertainment systems. The TV makers hope to ride the wave of popularity of improved stereoscopic 3-D movies, such as recent hit "Up," that are being shown in theaters. Perry, of Panasonic, said he expects 3-D TV to be common in homes within five to 10 years.

Technology that will make 3-D TV possible without glasses should be ready in 10 to 15 years, he said. Michael Bridwell, spokesman for Digital Projection, a company that makes high-end 3-D home theaters, said 3-D is the biggest technology coming to television and home movies in the foreseeable future.

4G TECHNOLOGY

We know that 3g technology is being implemented in india now a days......
3g has many features that we know ...but now i want to discuss about 4g...the upcoming technology....thats much faster than 3g now lets discussed abt that ...

whats 4G?

4G takes on a number of equally true definitions, depending on who you are talking to. In simplest terms, 4G is the next generation of wireless networks that will replace 3G networks sometimes in future. In another context, 4G is simply an initiative by academic R&D labs to move beyond the limitations and problems of 3G which is having trouble getting deployed and meeting its promised performance and throughput. In reality, as of first half of 2002, 4G is a conceptual framework for or a discussion point to address future needs of a universal high speed wireless network that will interface with wireline backbone network seamlessly. 4G is also represents the hope and ideas of a group of researchers in Motorola, Qualcomm, Nokia, Ericsson, Sun, HP, NTT DoCoMo and other infrastructure vendors who must respond to the needs of MMS, multimedia and video applications if 3G never materializes in its full glory.


Motivation for 4G Research Before 3G Has Not Been Deployed?

3G performance may not be sufficient to meet needs of future high-performance applications like multi-media, full-motion video, wireless teleconferencing. We need a network technology that extends 3G capacity by an order of magnitude.

There are multiple standards for 3G making it difficult to roam and interoperate across networks. we need global mobility and service portability

3G is based on primarily a wide-area concept. We need hybrid networks that utilize both wireless LAN (hot spot) concept and cell or base-station wide area network design.

We need wider bandwidth

Researchers have come up with spectrally more efficient modulation schemes that can not be retrofitted into 3G infrastructure

We need all digital packet network that utilizes IP in its fullest form with converged voice and data capability.

What is needed to Build 4G Networks of Future?

A number of spectrum allocation decisions, spectrum standardization decisions, spectrum availability decisions, technology innovations, component development, signal processing and switching enhancements and inter-vendor cooperation have to take place before the vision of 4G will materialize. We think that 3G experiences - good or bad, technological or business - will be useful in guiding the industry in this effort. We are bringing to the attention of professionals in telecommunications industry following issues and problems that must be analyzed and resolved:

Lower Price Points Only Slightly Higher than Alternatives - The business visionaries should do some economic modeling before they start 4G hype on the same lines as 3G hype. They should understand that 4G data applications like streaming video must compete with very low cost wireline applications. The users would pay only a delta premium (not a multiple) for most wireless applications.

More Coordination Among Spectrum Regulators Around the World - Spectrum regulation bodies must get involved in guiding the researchers by indicating which frequency band might be used for 4G. FCC in USA must cooperate more actively with International bodies like ITU and perhaps modify its hands-off policy in guiding the industry. When public interest, national security interest and economic interest (inter-industry a la TV versus Telecommunications) are at stake, leadership must come from regulators. At appropriate time, industry builds its own self-regulation mechanisms.

More Academic Research: Universities must spend more effort in solving fundamental problems in radio communications (especially multiband and wideband radios, intelligent antennas and signal processing.

Standardization of wireless networks in terms of modulation techniques, switching schemes and roaming is an absolute necessity for 4G.

A Voice-independent Business Justification Thinking: Business development and technology executives should not bias their business models by using voice channels as economic determinant for data applications. Voice has a built-in demand limit - data applications do not.

Integration Across Different Network Topologies: Network architects must base their architecture on hybrid network concepts that integrates wireless wide area networks, wireless LANS (IEEE 802.11a, IEEE 802.11b, IEEE 802.11g, IEEE 802.15 and IEEE 802.16, Bluetooth with fiber-based Internet backbone. Broadband wireless networks must be a part of this integrated network architecture.

Non-disruptive Implementation: 4G must allow us to move from 3G to 4G.

Industry Initiatives

WWRF (Wireless World Research Forum)- consisting of Alcatel, Ericsson, Nokia and Siemens have started a research forum for 4G

NTT DoCoMo has started conceptual (we mean paper) design of a 4G network.



COMPARISON BETWEEN 3G AND 4G

hey.........world is changing very fast....

Be alert .!!!!!!!!

World is changing very fast ..........





.... In this blog i like to share the new technologies that was devolped and r under devoloping ......


.. we have to know whats happening in this wthorld ....and should update latest technologies and devolopments...


just watch this video now........


http://economictimes.indiatimes.com/tv/TED-India-Pranav-Mistry/videoshow_ted/5231080.cms