Probably the final blow was dealt by Warner Bros. - it was the information about decision of releasing its high-definition DVD titles exclusively in Blu-ray disc format - beginning since June this year. After that Wal-Mart Stores decided to withdraw HD DVD players. It did not help at all that Xbox 360 consoles equipped with HD DVD players sold well in the end of last year (ca 100,000 pieces). Toshiba informed about a million HD DVD players sold by January of 2008. There were released 386 HD DVD films in the U.S., and 214 in Japan.
Paradoxically, the defeat of Toshiba, Nec, and Microsoft, will be a strong and invigorating impulse for quick development of the field. The potential customers will not be in a dilemma over which to choose or when to buy (waiting for a market resolution). It is also a chance for related businesses - film, TV, and electronics industries (higher demand for large-screen high-definition televisions and HDTV productions).
There is approaching the period when majority of people in the world will think about changing their TV/video equipment. Already this year the producers and distributors should begin to share the prosperity.
Mobile telephony is also included in the top rankings - already in 2006 there were more mobile phones than the number of inhabitants (by 7%).
97% of the residents can potentially use cable TV (52% of households subscribe it).
Israel belongs to the small group of countries having own satellites. The first satellite has been successfully launched on the orbit in 1996, and together with the second one - AMOS-2, is mainly used for direct TV transmissions. About 22% households subscribe digital satellite platform "Yes" from AMOS.
Other satellites, Gurwin-II TechSAT and EROS, are used for communication, cartography, and other research purposes.
Great potential of high-tech industries in Israel has attracted international corporations - the first overseas R&D divisions of such giants like IBM, Motorola, Cisco, or Deutsche Telekom were opened just in this country.
Among the companies listed on the NASDAQ stock market, Israeli firms are the second most numerous group (after Americans). They include so well known firms like Alvarion, Gilat Satellite Networks, Radware, RAD Data, Tadiran, Teledata, Telrad, VocalTec, Verint.
Telecommunications in Israel - a photo report.
To receive DVB-T signals the user needs to employ an appropriate DVB-T receiver (e.g. in Poland - MPEG-4, in Czech republic and Hungary - MPEG-2). Some LCD televisions are equipped with built-in tuners.
Taking into consideration gradual process of changing older TV sets, and the offer of new programs contained in digital multiplexes, it is recommended in building installations to convert such programs into analog form available for every user. For this purpose there is needed DVB-T receiver, RF modulator, and channel amplifier.
In Poland DVB-T programs are available in several locations, e.g. in the central part of Krakow (ch.37, 5watt, 16QAM modulation - 8 programs).
The diagrams below present rough comparison of some parameters (for similar image quality) when using different versions of MPEG compression (implemented in different DVRs). It is clear that H.264 algorithms, used in 3rd generation DVRs, ensure the best results - the lowest bandwidth and disc space requirements, the shortest download time. The parameters are about 30% better than in the case of "normal" MPEG-4 compression.
H.264 is currently the only compression that allows to build 16-channel DVRs capable of recording D1 video (PAL 704x576) at frame rate 25 fps, as well as providing effective network transmission of live and recorded images.
Disc space requirements
Flawless operation is possible due to server - client architecture. Additional posts are using sever resources, not influencing the cameras..
The maximum number of users depends on computing power of the server, needed for re-compression of video streams for individual clients.
This concept has been implemented in monitoring system in Myslenice. The system has been based on Netstation K3232 managing software and ACTi K1215 cameras.
Video surveillance system in Myslenice
The example of powerful wireless equipment is the family of Aphelion devices, with the following models: 500AG N2411 (1 transceiver), 600AG N2412 (2 transceivers), and 3300AG N2413 (3 transceivers).
The devices work in unlicensed 2.4 and 5 GHz bands, ensuring freedom of action. They may be used for creating independent access networks for any client devices.
Main features of Aphelion family that make it very competitive on the wireless market:
- Designed for wireless backbones with advanced QoS mechanisms.
- Optimized for efficient Internet access, IP CCTV monitoring, VoIP telephony.
- Certified (IP67) outdoor housing ensuring full protection against adverse environmental conditions, including those of industrial environment.
- Possibility of creating MESH networks with Hot-Spot and Hot-Zone functions, efficient trunks with intelligent load balancing between two antennas, and backup links (real transfers of 60 Mbps, max.162 Mbps). TRUNK connections allow better efficiency due to aggregation of a number of physical connections into one logical link, without a need of additional equipment like load balancers.
- Management functions are performed in text mode via SSH console (with data encryption).
Wireless access point Aphelion 500AG N2411
Wireless access point Aphelion 600AG N2412 (2 transceivers)
Wireless access point Aphelion 3300AG N2413 (3 transceivers)
Wireless access point Aphelion 500AG
Wireless access point Aphelion 600AG
Wireless access point Aphelion 33000AG
Modes of work
64 MB (RAM),
64 MB (RAM),
64 MB (RAM),
2400 MHz ÷ 2483 MHz,
5150 MHz ÷ 5350 MHz,
5470 MHz ÷ 5725 MHz
Max. RF power
802.11e WiFi QoS
WLAN security features
64/128/152 bit WEP,
Mac Address Filtering
AC/DC PoE adapter (in: 100 ...240 VAC)
Antenna system measurements. Knowledge of signal parameters, among others: differences in levels of useful signals, signal levels in subscriber outlets, BER, level of noise and interferences allows to prepare optimal design and verify actual results...
- archive DWR of Nov. 19, 2007
Home and business Wi-Fi networks - applications of TP-Link family TP-Link in one of the leading producers of network devices for home and business applications. The devices are reliable, easy to configure and offer modern design...
- DIPOL's Library
Monitoring of dispersed locations - how to lower cabling costs. Video transmitters/transformers allow to use UTP/FTP cables for video transmission, which lowers the cost of cabling by 50%...
- archive DWR of Sept. 10, 2007
Index of published issues.
Power of technology - Mobile World Congress - Barcelona 2008. German radar stations during WWII - new discoveries....