Thursday, February 13, 2014

HD Video Transmission Capabilities Made Possible With HDMI Extenders and Wireless USB Extenders

Having all required equipment in the vicinity of the desired site is difficult to manage, especially when the output (display) unit needs to be placed at a distance from the console. Extenders serve this purpose effectively by providing links between the main operating system and the remotely located display unit. Any extender would fulfill your purpose but if smart solutions are desired then the only contenders that are able to deliver the desired results are HDMI extenders and Wireless USB extenders. These are extremely useful for transmitting high definition video signals without the risk of the quality of the signals being degraded in the process. Lets take a look at the technical configuration and performance capabilities of these "smart" extenders.
HDMI (High Definition Media Interface) Extenders:
HDMI extenders find application where video signal clarity holds the highest significance when transmitting data over long distances. The configuration may involve either a single device or a pair of devices usually powered by 5V DC from the source of HDMI or with an external source. Using long cables can be a problem as it leads to instability of the HDCP which in turn is indicated by blinking on the screen. The reason for this is due to weakening of the DCC signals that are required by the HDCP. The HDCP requirements for HDMI extenders with respect to the use of a single Cat 5 or Cat 6 cable can only be met if the DCC signals of HDCP are multiplexed with the video signals of TMDS.
Most vendors offer repeaters and amplifiers to link multiple HDMI cables together. However, active HDMI cables make use of technical facilities located within the cable to boost the signal strength due to which it becomes possible to HDMI cables to possess lengths of 98 feet (30 meters). For even lengthier variants, the configurations of the HDMI cables need to possess dual Cat 5 or Cat 6 cables for extending the length to 820 feet (250 meters) and for extending the length to 300 meters, the system has to be based on optic fiber transmission. The benefits of using optic fiber in HDMI cables include protection from radio signal interference, signal noise avoidance, and prevention of electromagnetic interference. This proves to be major leverage in situations where sensitive and confidential video data is to be transmitted over distances without losing the signal quality.
There is a difference between HDMI cables and HDMI extenders. While cables can solve the purpose of connecting HDMI devices with their respective output units, extenders are used to link units over distances without compromising the quality and strength of the signal. It is this characteristic of HDMI extenders that makes it a "smart" and preferable choice for transmission of high definition video.
Being a condensed interface for transmitting uncompressed data from HDMI compliant sources, it is capable of maintaining the crispness and clarity associated with HD audio-visuals. Most users are not able to differentiate between video streamed directly and that which is streamed with the help of extenders. Due to such characteristics, HDMI extenders are highly cost effective, have extremely high efficiency levels and have high durability.
Wireless USB (Universal Serial Bus) Extenders:
USB extenders usually make use of Cat 5, Cat 5e and Cat 6 cables for aiding smooth and undistorted transmission of video signals. The components are less bulky and are fairly easy to work with. However, the wireless USB extenders do not have the requirement of cables as the only components involved in the process are a receiver and an emitter. The entire process of data transmission takes place without the use of wires over established networks.
The major advantage of using USB based wireless transmission is the complete elimination of active power sources as the USB ports on the systems serve as power outlets so the adapters do not have any requirement of separate or additional power connections. The benefits of using this extender is the complete elimination and cessation of dependency on cables and convenient arrangement of equipment as well as connected units in a given space. These facilities also make work highly flexible with the layout of a place being changed as per the need without being concerned excessively on management of cables. Other key benefits include the ability to operate in places having high interference and absence of active network hot spots, to provide transmission links in situations where the internal network environment fails to bridge the gap between the computer / device and the router, and the capability of sustaining high performance when working in environments serving as hubs.
Certain wireless USB extenders maintain compliance with 802.11 protocols with most of them possessing backward compatibility. Further advancements led to the development of protocol 802.11a that runs at a frequency of 5 GHz for which the access port needs to have the same operating frequency. The latest generation of this protocol is 802.11ac and all equipment following this protocol are backward compliant with 802.11n, 802.11g, and / or 802.11b equipment.
However, older versions would not be able to relay the signal of newer generations due to safety issues raised by the implemented encryption algorithms. Moreover, the wireless routers themselves cannot assure the security of the established network. The same needs to be equipped on the extenders and repeaters in order to ensure the safety of the connected systems in the respective wireless network. Such features make video transmission highly convenient, safe, cost effective, hassle free and flexible in a stiff environment, especially when HD videos are involved.

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