
Screens
It goes without saying that for a church video system to be effective it has to be clearly and comfortably visible throughout the viewing audience. For text, screen size must be adequate for reading and with video large enough to reveal detail. Furthermore, screen location and orientation must take into account allowable off-axis viewing angles. Screen material options have to be evaluated based on projector characteristics and room lighting.
Image Quality
Image quality is defined by a number of characteristics relating to resolution, brightness, contrast, color rendition, and signal processing. The success of these elements is a result of the sum of parts beginning with the video source, proceeding through processing and switching devices, traveling along the cabling to a display or becoming airborne at the projector and then ultimately revealed upon the screen. Achieving high image quality involves understanding the factors that impact it at each point along the path and making the appropriate design decisions. Once this is accomplished, the MediaMerge setup and calibration process ensures optimum display performance and consistency.
Installation
Video signals are very cable and connection sensitive. Consistent impedance must be maintained throughout the video system. This is directly affected by the quality of the cable and connections. Poor terminations will lead to signal reflections or image “ghosting”. Improper cabling will result in dim images and loss of detail. Video is also extremely susceptible to electrical noise and ground loops. Circuits must be carefully specified and run to avoid artifacts in the image.
User Interface
Great equipment doesn’t necessarily ensure great production. One of the most important facets of good design is to truly understand the needs and scenarios the customer will face. Typical video presentation can require computer operation, camera operation, video switching, routing, machine control, cueing, recording…all at the same time! If user interfaces are not thought out, operation becomes inefficient and production quality is compromised. When the flexibility of a church video system is limited, creativity is stifled.
Broadcast
The requirements and equipment for TV quality broadcast are much different from those of typical audio or video systems. Effective systems require a working knowledge of television production techniques and standards with regard to formats, equipment, audio, and lighting. In house editing systems are often necessary to provide a complete solution.