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VOSCOM’S VOS-1000 FIBER OPTIC TRANSMISSION SYSTEMS MAKES THE CONNECTION FOR CBS NEWS CREWS

June 7, 2010 Leave a comment

For political conventions of news was live from Super Bowl VOSCOM’S VOS-1000 on the grounds of the fiber optic transmission systems, has contributed to CBS News Top Stories provide viewers at home. VOSCOM, a leading provider of fiber optic converter for audio and video routing solutions for the delivery of broadcasting and Pro A / V applications YOUR-winning CBS News in 1000 as part of their equipment for the transmission of video from multiple locations in the diffusion of various new programs.

“For the live broadcast of our regular news broadcasts in several places, the sand on the south beach, Sun Life asked Stadium during the Super Bowl, that the material must be very portable,” says Mel Olinsky, Director of the Office Operations, CBS News. “Working on-site, we also need to transport HD signals over long distances, which was impossible with copper. The VOS-1000 field optics fiber transmission provided that the all of our cable connectivity over a fiber strand multi without restrictions on duration. ”

CBS VOS-1000 widely used, several major events including political conventions and the last Super Bowl. During the week before Super Bowl VOSCOM Use VOS-1000 video transport for several new programs, including “The CBS Early Show,” CBS Weekend Evening News “and” Face the Nation “, all live in different places, including South Miami and Miami Beach Gardens Sun Life stage. For these shows, CBS News needed the ability to supervise both HD and SD video signals and wanted to and fro transportation from various locations in South Florida’s network OB truck, often parked near the place . A battery, bi-directional HD designed the fiber transmission system for field use and harsh environment applications, the VOS-1000 is the ideal portable solution for transmitting signals over distances ranging up three football fields away from turning over any local transport.

Frank Xu, Director General, VOSCOM, said: “The Place-ENG and production can be very hectic, especially in advance of important events.” He concluded: “The VOSCOM takes some of the stress of live shooting distance, as it is very easy, quite robust to any state in the field and transported extremely reliable. We are very pleased that our VOS-1000 plays a role, ensuring that emissions go up CBS News smoothly. “

CBS News continued to units VOS-1000 for remote broadcast. For more information on the VOS-1000, please visit http://www.voscom.com

Baseband Video Fiber Optic Transmission

May 13, 2010 Leave a comment

Baseband video consists of one video picture being sent point-to-point, such as the video output of a VCR to the video input of a monitor. Figure 1 illustrates simple point-to-point transmission. There exist two levels of service for baseband video: broadcast studio and consumer. These types describe, primarily, the quality of the signal. Broadcast studio quality requires a much higher signal fidelity, while consumer quality baseband requires is less demanding. In addition to the difference in signal fidelity, there is also a difference in the connectors typically used for the transmission of these signals. The broadcast baseband applications typically use a BNC connector and the consumer baseband applications typically uses an RCA connector.

Figure 1 – Point-to-Point Transmission

Figure 2 – BNC and RCA Connectors

Baseband Video Signals
The most basic form of a television signal is a baseband video signal, also referred to as a composite video signal. In an AM baseband system, the input signal directly modulates the strength of the transmitter output, in this case light. The baseband signal contains information relative to creating the television picture only. The following information is carried on a baseband signal:

• Scanning: drawing the television picture
• Luminance: the brightness of the picture
• Chrominance: the color of the picture

The creation of the baseband signal produces a range of frequency components. The highest frequency in a baseband signal is also its bandwidth. The lowest frequency ranges close to zero Hz or DC. The video output of a television camera or video tape recorder has its highest frequency, therefore, its bandwidth, at either 4.2 or 6 MHz, depending on the type of TV format used. Looking at an actual baseband signal, illustrated in Figure 3, we can see that the camera and the video display are scanned horizontally and vertically. The horizontal lines on the screen are scanned alternately, with the odd numbered lines first and the even numbered lines second, or vice versa. (Figure 3B depicts the initial scan of the odd numbered lines.) This method is known as an interlacing system. The second method is to scan the lines sequentially; this is known as progressive Scanning. The camera and receiver must be synchronized when scanning and reproducing an image. The horizontal and vertical sync pulses regulate the synchronization of the camera and receiver, illustrated in both 3B and 3C, and starts a horizontal trace. As seen in Figure 3A, during the horizontal blanking interval, the beam returns to the left side of the screen and waits for the horizontal sync pulse before tracing another line. The dotted line illustrated the horizontal retrace. When the beam reaches the bottom of the screen, it must return to the top to begin the next field. This is called the vertical retrace, which is signaled by the vertical sync pulse illustrated in Figure 3C. The vertical retrace takes much longer than the horizontal retrace, therefore, a vertical blanking interval ensues to synchronize the two signals. During both the horizontal or vertical blanking intervals no information appears on the screen.

Figure 3 – Baseband Composite Video Signals

Baseband Video Applications
Figure 4 illustrates a multimedia baseband fiber optic transmission systems.

Figure 4 – Multimedia baseband transmission

How Fibre Optic Surveillance Systems Work

April 11, 2010 1 comment

Protection With Fiber Optic Surveillance Systems

Security has become a word that is taken very seriously in the twenty-first century. Optical surveillance systems are security set-ups that utilize cameras which are able to monitor surrounding areas in various lighted (or non lighted) environments. The cameras are able to adjust to day or night conditions and allow clear imaging of an area. Many different locations are using optical surveillance systems to achieve security goals.

These include:

• Transportation such as airports, and public transportation terminals

• Manufacturing facilities, particularly large ones that have a high risk threat such as petroleum processing and military sites.

• Military and Armed Services, including defense facilities that rely heavily upon optical surveillance, even in the battlefield.

Optical surveillance systems are able to transmit images by different means such as fiber optic technology. To understand how fibre optic transmission systems work, you will need to understand the basics of fiber optics.

How Fibre Optic Surveillance Systems Work

Digital images are transmitted through a camera via a fiber optic cable. Fiber optic cable consists of strands of pure glass that are thinner than human hair. The strands carry digital information (such as images) over distance and deliver the information to a receiver. The strands are arranged in bundles that have an outer jacket (covering).

The light (image) is transferred along the fiber optic cable by bouncing along the mirror lined walls of the cable. The purity of the glass used in the fiber optic strands affects the clarity of the image transmitted to the receiver. This is an important factor to keep in mind if you are looking to purchase any fiber optic products.

Fibre optic surveillance systems allow wireless surveillance camera systems to function and transmit images. The system is comprised of these components:

1. A fiber optic transmitter is used to feed data into. The transmitter transforms the information into coded light.

2. The optical fiber conducts the light signals over a distance.

3. An optical booster may be used to amplify the light if it is traveling a long distance.

4. An optical receiver decodes the light signal back into the original data format.

This method is how information is transferred from wireless surveillance camera systems. The camera takes the image, its transmitter sends the image signal (via fiber optic light) to the receiver. The receiver translates it into an image that can be viewed.

This technology has proven very beneficial for most communications. It has profoundly affected military communications on the battlefield. Troops in combat areas are able to communicate over extremely long distances without being detected.

Many tactile missions must be done in darkness to have the winning advantage. Optical surveillance systems and fiber optic transmission technology allow this to happen. The same technology that helps our military protect us is also available to protect our homes as well. Lower cost versions of the same systems are being used by many people to protect and monitor their belongings and loved ones. Businesses depend on these types of business surveillance systems for security in retail stores, industrial manufacturing facilities and many others.