Power Had 1000 Ccd; High Depth Of Modulation; Minimum Aliasing With New Optical Low-Pass Filter; High Sensitivity - Sony BVP-900 Series Product Information Manual

imager technology with a sustained, broad-ranging research and
development program. The benefits of this technological
commitment can be seen in the wide range of Sony CCD cameras -
from mass produced types for consumer use to professional cameras
for field and studio operations. The top end of this range has now
been further expanded with the introduction of the Power HAD 1000
16:9/4:3 switchable widescreen CCD sensors for the BVP-900 Series.
Photo 3-1 Sony leading technology used in these CCDs is applied in the
Power HAD 1000 imager
Total picture performance is a complex function of many attributes in
imagery. Improvements in overall camera picture quality are a result
of continuing developments of the CCD imager, the CCD support
circuitry and video processing. As the CCD imager itself remains
central to the direction of recent camera development, enhancements
to the total performance of CCDs for broadcasting cameras are of
critical importance. For this purpose, Sony developed the Power
HAD 1000 and has continuously been refining it ever since.

3-3. Power HAD 1000 CCD

The Power HAD 1000 CCD has 1038 horizontal picture elements, a
total of 520,000 for NTSC and 620,000 for PAL. Introduced with the
previous generation of cameras, the BVP-500 Series, Sony improved
the Hyper HAD 1000 CCD to complement 10-bit DSP. For the new
'top of the line' BVP-900 Series, Sony has developed a totally new and
outstanding design of CCD imager to complement its 12-bit ADSP for
the following reasons.
Photo 3-2. Sony Power HAD 1000 CCDs
SONY ADVANCED ELECTRONIC IMAGING TECHNOLOGIES
High picture quality
With its extremely high pixel count, the Power HAD 1000 provides a
horizontal resolution of over 900 lines, a high depth of modulation of
80% and minimum aliasing. Sony advanced semiconductor
technologies also give the Power HAD 1000 high sensitivity and very
low smear - despite its large number of picture elements. With the
inherent high level of picture quality provided by this imager, the
precise picture adjustment capability of digital cameras becomes
even more important.
Excellent matching of CCD and camera to digital environment
The Power HAD 1000 has not just been developed to provide
excellent picture quality. When developing a CCD for digital cameras,
the relationships between CCD drive clock frequency, digital signal
processing sampling rate and the digital VTR sampling rate have to
be considered. Simple relationships between these three parameters
result in easy signal conversion from CCD output to digital video
signal, in turn reducing the complexity of the digital LSIs and
reducing camera power consumption. The 18 MHz clock frequency
of the Power HAD 1000 was chosen to fulfill this requirement. It has
a direct relationship to the 18 MHz and 36 MHz sampling rates in the
camera and a simple, 4/3 relationship, to the 13.5 MHz sampling
frequency of the Digital BETACAM™ format.

3-4. High Depth of Modulation

The high packing density achieves an excellent depth of modulation
performance of 80 % at 5 MHz.
RESPONSE
1.2
1.0
Power HAD (520,000 pixels)
0.8
0.8
Pbo (1-1/4")(XQ3430)
0.6
Pbo (2/3")(QX3457)
0.4
0.2
0
0 2 4 6 8
-0.2
-0.4
-0.6
Figure 3-2. Depth of Modulation characteristic

3-5. Minimum Aliasing with New Optical Low-Pass Filter

Incorporating the Power HAD 1000 in the BVP-900 Series involves an
extremely high sampling rate of 18 MHz. This high clocking rate, in
combination with precision CCD spatial offset and the exclusive
design of the new optical low-pass pre-filter, reduces aliasing to a
level never achieved in previous generations of CCD cameras.

3-6. High Sensitivity

The power HAD 1000 CCD imager inherits the OCL (On-Chip-Lens)
technology used in all other Sony broadcast-range cameras. The OCL
layer of the CCD chip effectively concentrates the incident light on
Overrall Y Response
(with Optical LPF, without Lens)
cf2: Pbo (1-1/4")(XQ3430)
cf1: Pbo (2/3")(QX3457)
10 12 14 16 18 20
HORIZONTAL FREQUENCY (MHz)
3
18