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Chapter 1
Introduction
1.1 Technology
The LDK 8300 is a high speed, HD multi-format digital camera head using three 2/3-inch HD-
+
DPM
™ sensors. Combined with the Grass Valley LDK 5880 HD fiber adapter and the
LDK 4583 High-speed Base station, the camera head forms a flexible camera system that is
equally at home in the studio or out on location. The camera system can capture and deliver
HD images, natively, at single, double or triple speed frame rates.
1.1.1 HD sensors
The camera head uses HD-DPM
ultimate flexibility. Native wide screen pictures in the high-definition formats 1080i and 720p
are produced at the touch of a button. This unique native multi-format capability is realized with
innovative 9.2 million pixel 2/3" CCD sensors. These allow vertically grouping of different
numbers of pixels on the sensors themselves. There is no need for HDTV format conversion
during digital signal processing which would lead to quality degradation.
These sensors have a high dynamic range and high linear sensitivity across all camera lens
apertures. They are based on Frame Transfer technology, which ensures that there is neither
lag nor smear.
1.1.2 Digital processing
The advanced digital processing of the camera is based on 12-bit A/D converters and more
than 22-bit internal processing. All major camera functions are processed in the digital domain,
including knee, gamma, detail, matrix and colour correction.
The intelligent continuous automatics facility provides automatic control of black levels and
black shading. Each sensor provides black reference signals that are used to monitor
temperature changes. This means that continuous automatic correction is applied without
operator intervention.
The digital detail processing uses full amplitude video RGB signals via an extended dynamic
range detail circuit. Colorimetry is selected by means of a variable 6-point digital matrix or via
preset matrices. Digital gamma circuits provide a wide range of standardised gamma curves
and enable soft contrast in black scenes to be enhanced, together with hard contrast and
saturated colour in bright scenes. The matrix and gamma sequence is software programmable
for precise colour matching.
LDK 8300 HDTV High-speed camera system User's Guide (v1.0)
+
™ CCD sensors which offer superior performance and
Chapter 1 - Introduction
13
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