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I mentioned in my blog on “7.1 Loudspeaker Placement Standard” the fact that picture performance has significantly improved with 1080p resolution, color accuracy, and display calibration and now 7.1-channel holosonic® surround imaging has got to be standardized to ensure that the movie soundtracks and surround music of the future take us to a new sensory audio dimension. The cathode ray tube (CRT) has been and continues to be the standard for visual confirmation of color accuracy in the professional production and mastering world. The standards for colorimetry, gray scale, gamma, and color space are all written for CRT displays. These standards dictate every recorded frame of video that is produced for home viewing. The latest display technologies—whether LCD, plasma, LCoS, D-ILA, or DLP—are bound by these standards. The debate continues at the professional level as to whether the new technologies are capable of matching the performance of the CRT, with respect to correctly displaying NTSC colors and gray scale as well as new digital standards. The Society of Motion Picture and Television Engineers (SMPTE) is the professional body that deals with this concern and sets the professional production and display standards. SMPTE recently published the “Study Group Report On Display Technologies,” which addresses the need to write a standard for current and future image displays. In the report, SMPTE defines the capabilities of modern professional CRT monitors to which newer flat panel monitor displays need to conform. The report addresses luminance ranges, contrast ratio, color gamut, screen pixel array sizes, deinterlacing, delay time, pixel defects, streaking, and motion artifacts. In the report, it is noted that as reference displays, professional CRT displays can adapt to different resolutions by changing scanning frequencies and, thus, can display almost any video source in its native format without any transformation of the image, while displaying a wide range of linear gray scale and accurate and precise color shading. There are drawbacks, however, to the CRT display, namely the brightness of the image is limited by the size of the tube, and tube brightness influences the resolution of the image (spot size). LCD, plasma, LCoS, D-ILA, and DLP displays must, to be accurate, be able to re-create the same gray scale and colors that comprise the original mastered video. For professional CRT monitors, SMPTE-C phosphors are used to create realistic colors. Thus, it is important is determine whether the new alternative display technologies can accurately reproduce SMPTE-C colors and the new standards for high-definition digitally mastered video. Such performance evaluation is critical to knowing how accurate the image you see conforms to the image produced in mastering. Gary Reber Editor-In-Chief & Publisher Widescreen Review
Tags:
- editor's couch -
- CRT -
- plasma -
- LCD -
- SXRD -
- D-ILA -
- DLP -
- LCoS -
- SMPTE -
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