Windows Server is a brand name for server operating systems released by Microsoft Corporation. This name has been used for the following software releases:
* Windows Server 2003
* Windows Server 2008
o Windows HPC Server 2008, an edition designed exclusively for high-performance computing
o Windows Server 2008 R2, the current release of Windows Server 2008
* Windows Small Business Server, an operating system based on Windows Server with some integrated Microsoft Servers, for small businesses
* Windows Essential Business Server, a product similar to Small Business Server, but for medium-sized businesses
* Windows Home Server, a home server operating system for file sharing and streaming, automated backups, and remote access
Video on Demand (VOD) or Audio Video on Demand (AVOD) are systems which allow users to select and watch/listen to video or audio content on demand.
Television VOD systems either stream content through a set-top box, allowing viewing in real time, or download it to a device such as a computer, digital video recorder (also called a personal video recorder) or portable media player for viewing at any time. The majority of cable- and telco-based television providers offer both VOD streaming, such as pay-per-view, whereby a user buys or selects a movie or television program and it begins to play on the television set almost instantaneously, or downloading to a DVR rented from the provider, for viewing in the future. Internet television, using the Internet, is an increasingly popular form of video on demand.
Some airlines offer AVOD as in-flight entertainment to passengers through individually-controlled video screens embedded in seatbacks or armrests or offered via portable media players. Airline AVOD systems offer passengers the opportunity to select specific stored video or audio content and play it on demand including pause, fast forward, and rewind. Read more about: Video on demand
Television interference (TVI) is a particular case of electromagnetic interference which affects television reception. Many natural and man-made phenomena can disrupt the reception of television signals. These include naturally occurring and artificial spark discharges, and effects due to the operation of radio transmitters.
In this article, only conventional UHF (or VHF) AM TV will be considered. Satellite TV tends to be FM TV and operates around 6 or 10 GHz (microwaves). While this page is mainly concentrated on UHF AM TV, many of the principles can be applied in cases where other devices are being troubled by poor reception. Also the advice on radio transmitter interference can be helpful in cases of non-radio equipment such as Hi-Fi units and stereos.
Strong TV signals
It is possible to also get a bad picture if the signal strength of the TV transmitter is too high, for instance in the Bromley area of south east London the signal from the TV mast is so strong that it may cause the TV's front end to be overloaded. Check for this by inserting an attenuator inside with the TV aerial connection. If you start by trying with 10 dB, and then move to 20 dB then this might provide a cure.
In that part of London the TV transmitter (Crystal Palace Transmitter) and the Croydon Transmitter tower which has VHF pager transmitters are both such strong sources of radiowaves that FM only UHF (432 MHz) and VHF (144 MHz) radiosets can become overwhelmed when they are attached to a beam aerial which is pointed at the Crystal Palace and Croydon towers respectively. The receiver of the FT-290R2 which is a 144 MHz multimode (FM/CW/SSB) radio is more able to cope with such strong out of band signals.
So this problem of overloading is not confined to TV sets only. One of the reasons these FM radio sets have this shortcoming is the fact that they often use two diodes which are wired acros Read more about: TVi
CentOS is a community-supported, free and open source operating system based on Red Hat Enterprise Linux. It exists to provide a free enterprise class computing platform and strives to maintain 100% binary compatibility with its upstream distribution. CentOS stands for Community ENTerprise Operating System.
Red Hat Enterprise Linux is available only through a paid subscription service that provides access to software updates and varying levels of technical support. The product is largely composed of software packages distributed under open source licenses, and the source code for those packages is made public by Red Hat.
CentOS developers use Red Hat's source code to create a final product very similar to Red Hat Enterprise Linux. Red Hat's branding and logos are changed because Red Hat does not allow them to be redistributed.
CentOS is available free of charge. Technical support is primarily provided by the community via official mailing lists, web forums, and chat rooms. The project is not affiliated with Red Hat and thus receives no financial or logistical support from the company; instead, the CentOS Project relies on donations from users and organizational sponsors. Read more about: CentOS
Protected Streaming is called a DRM technology by Adobe. It is used to give the impression that digital content (video or audio) is being protected from unauthorized use.
Protected Streaming consists of many different techniques; basically there are two main components.
This technique is used by the RTE Player.
Encryption
All content is encrypted by the Flash Media Server "on the fly". This means there is no encryption of the source file needed (which is different from Microsoft DRM, for instance). For data transmission, a special protocol is used: RTMPE or RTMPS.
RTMPS uses SSL-encryption, RTMPE makes use of well-known industry standard cryptographic primitives consisting of Diffie-Hellman key exchange and HMACSHA256, generating a pair of RC4 keys, one of which is then used to encrypt the data sent by the server (such as the audio or video stream), whilst the other key is used to encrypt any data sent to the server. RTMPE causes less CPU-load than RTMPS on the Flash Media Server. In the past, some tools were able to capture RTMPE streams by taking advantage of a security hole within the Flash player object. Adobe fixed this issue in January 2009.
Tools which have a copy of the well-known constants extracted from the Adobe Flash player are still able to capture RTMPE streams, which is a form of the trusted client problem. Adobe issued a DMCA takedown on one such tool named rtmpdump to try to limit its distribution.
SWF verification
The Adobe Flash player uses a well-known constant, appended to information derived from the SWF file (a hash of the file and its size), as input to HMACSHA256. The HMACSHA256 key is the last 32 bytes of the server's first handshake packet. Flash Media Server uses this to limit access to those clients which have either had access to the SWF file (or have been given a copy of t Read more about: RTMPE
