enhanced visual communication

Click here to load reader

Post on 20-May-2015

507 views

Category:

Documents

1 download

Embed Size (px)

TRANSCRIPT

  • 1. Enhanced Visual Communication for Videoconferencing: The Brightline Solution 2006 Brightline LP

2. Contents Page 4:The Brightline Solution: Principles Page 9:Why?: Benefits of Brightline Technology Page 15:Where?: Fixture Positioning Page 23:How Bright?: Light-Intensity Levels Page 27:How Dim?: Intensity Control/Dimming Page 30:Which Bulbs?: Lamp Selection Criteria Page 32:Lighting a Single Presenter Page 36:Lighting a Classroom Page 38:Lighting a Conference Room Page 50:Lighting a Public Meeting Room Page 55:What Help?: Certifications/Support Page 56:Who Else?: Selected Corporate Clients 3. Brightline videoconferencing technology derives from its industry-leading fluorescent studio fixtures, which bring unparalleled performance, reliability, and energy efficiency to broadcast facilities worldwide. 4. The Brightline Solution: Principles

  • Brightline specializes in the presentation of video images. It is common knowledge that an important component of interpersonal communication is nonverbal. Brightlines methods, techniques, and technologies deliver clarity and increased visual content to this nonverbal information.
  • Brightlines recipe for superior broadcast and/or videoconference results requires control of the following key elements:
  • 1. the placement of light within a three-dimensional space,
    • 2. t he quality of light used, and
    • 3. t he intensity and balance of all lighting within the space .

5. T he Brightline Solution (cond)

  • Achieving proper lighting control will greatly facilitate attaining certaincritical characteristics of successful videoconference communications:
  • Making a two-dimensional medium appear three-dimensional.
  • Highlighting subjects in the correct hierarchy of on-camera importance.
  • Enabling presenters to appear natural, healthy, and realistic.
  • Maintaining proper contrast ratios within a room.
  • Eliminating signal-to-noise ratio problems in video.
  • Here are several examples of successful Brightline videoconference lighting installations:

6. Brightlines layout for this meeting/videoconference room illustrates how a lighting plan must harmonize with the architecture and other elements in the space. 7. Optimized for video, Brightline advanced fluorescent lighting technology can also adapt for conditions such as the presence of ambient daylight, if necessary. 8. Brightline solutions help make videoconferencing among the most important and highly secure forms of government and business communications. 9. Benefits of BrightlineTechnology Long the accepted standard of excellence in the television studio with itsSeriesONEfixture family, Brightline fluorescent lighting products are now recognized worldwide as the choice for superior performance across the entire range of videoconference applications. BrightlinesT-Seriessystems provide broadcast-quality illumination--optimized for todays advanced solid-state video cameras--in a format designed for easy installation in any type of ceiling. TheT-Series patented articulation feature makes them the only fixtures that can be precisely rotated into a desired directional position during conferences and then returned flush to the ceiling between sessions or for general task lighting. As with all of Brightlines energy-efficient fluorescent technologies, theT-Seriesoffers a multitude of advantages when compared with incandescent lighting, among them: 10. BrightlineTechnology Benefits (cond)

  • Low power consumption--as much as 80-90% less than for incandescent fixtures--which can provide significant energy savings and rapid return on investment. (Brightline is an Energy Star Partner of the U.S. Environmental Protection Agency.)
  • Low heat generation, resulting in less load on HVAC systems and greater comfort for conference participants, lecturers, students, audiences, etc.
  • Longer lamp life--approximately 8,000 to 10,000 hours versus an average of 250 to 500 hours for standard 3200 K tungsten-halogen lamps. This results in component and maintenance cost savings and eliminates disruptive relamping/recalibrating sessions. T-Series lamps also have a high Color Rendition Index (CRI), typically >85, for rendering accurate color values.
  • A wide variety of dimming options, including digital DALI and DMX control. Dimming withT-Seriesfixtures produces a negligible shift in color temperature compared with traditional dimmers and incandescent lamps.

11. Brightline Technology Benefits (cond) In todays era of complex and fast-paced communications, organizations ranging from corporations to government entities depend on videoconferencing as a critical element of strategic preparation and response. A successful videoconferencing environment depends on a number of factors: room, furniture, wall covering, cameras, projection and transmission technology, and so on. Among the most critical components is lighting:it is a simple fact that the most sophisticated interior design, cameras, and data-transmission networks will not produce images of satisfactory quality if a room is poorly lit .However, combining these elements with effective lighting can ensure that nuances of facial expression, gesture, and body language that make up such an important part of physical and psychological communication are not obscured or misrepresented. 12. Brightline Technology Benefits (cond)

  • BrightlinesT-Seriessystems can help its customers provide this accuracy of communication in a uniquely versatile, reliable, and efficient format:
  • Through advances in lamp, ballast, and fixture design, Brightlines fluorescent technology produces a spectral output that can be read and processed by todays high-end electronic video cameras without the image degradation commonly associated with other light sources.
  • T-Seriesfixtures offer unequalled control, in two senses. First, their patented articulation capability enables users to fine tune a look by placing the light exactly where required, and nowhere else. Second, an unprecedented range of sensing and dimming options allows for modulation of intensity levels in response to subtle environmental changes or the requirements of individual conference participants.

13. Proper lighting makes a tremendous difference in how people look--and thus how they communicate--during a videoconference, as seen in this comparison between standard fluorescent down lights (left) and broadcast-qualityT-Seriesfixtures (right). 14. Accurate reading of a videoconference participant requires an accurate image derived from the quality, quantity, and directionality of the lighting. 15. Fixture Positioning

  • Successful videoconference lighting achieves the optimal aesthetic impact through the most appropriate technology. Whereas the ultimate goal of any lighting decision should be to arrive at the best result--that is, the highest-quality image--choices will also be affected by considerations such as the architectural particularities of a room or budgetary issues.
  • The standard lighting formula derived from television procedures is a three-point setup comprising a key light and backlight of roughly equal intensity and a fill light that is approximately half the power of the other two lights. In this configuration, the multiple front lights (key and fill) add three-dimensionality to the subjects face and eliminate unattractive shadows, while the backlight on the top of the head and shoulders creates a halo effect and a sense of depth behind the subject (see Figure 1).

16. Figure 1. The lighting plan for this mini HDTV studio set is based on a three-point setup with wide-enough coverage to light a cyclorama wall behind the desk. 17. In a studio setting, vertical yokes can be used to achieve tighter beam cutoff, enabling different on-camera subjects to have individualized lighting levels. 18. Fixture Positioning (cond)

  • If circumstances permit, three-point lighting is also the preferred arrangement for videoconference installations withT-Seriesfixtures. The front lights should be arranged so that they form an angle of approximately 90 (with the subject at the vertex) relative to one another, enabling the light to wrap the face (see Figures 1-2).

Figure 2. Typical three-point lighting setup. 19. Fixture Positioning (cond)

  • The ideal vertical angle for the front fixtures is approximately 40 above the subjects horizontal sight line. If the angle is steeper than 40--in other words, closer to vertical--unwanted shadows can be cast on the face. On the other hand, an angle that is too shallow can cause the light to spill onto the wall behind the subject.
  • Just how far from the subject a fixture needs to be placed in order to maintain this 40 angle can be determined through a trigonometric function that we wont detail here. For practical purposes, however, the calculation results in the following rule: the horizontal distance of the fixture from the subject should be approximately 1.2 times the distance from the subjects face to the ceiling.

20. Figure 3. Optimal vertical fixture placement (40 angle) for videoconference lighting. This example presupposes a 9-ft ceiling and a 4-ft face height. 21. Fixture Positioning (cond)

  • As an example, Figure 3 depicts a seated individual in a room with a
  • 9-ft ceiling. Assuming that the subjects face is 4 feet above the floor, the distance from face to ceiling is 9 ft 4 ft = 5 ft.If we multiply 5