Sony BVP-E10 Series, Руководство по эксплуатации товара

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Chapter 3 Benefit of Sony ADSP (Advanced Digital Signal Processing)
BVP-E10 Series Product Information Manual
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3-1. Full DSP Camera Processing
The BVP-E10 Series uses 12-bit A/D conversion
together with Advanced Digital Signal Processing
(ADSP) based on the latest generation of digital LSI
technology to deliver superb SDTV images. ADSP
provides a number of innovative and powerful control functions, increasing the creative tools available to
camera users. ADSP also takes advantage of several
techniques to maximize the performance of the digital
processing, in order to exploit the wide dynamic range
given by the Power HAD EX CCD sensor
3-2. Maximum Dynamic Range
(1) Optimized bit assignment
In the BVP-E10, video signals up to 260% of white level
is processed linearly. Highlights over 260% are
compressed by a pre-knee circuit before A/D
conversion, providing the most efficient utilization of
the 12-bit A/D conversion process.
(2) Auto Knee
The BVP-E10 Series uses a digital knee circuit to
increase the dynamic range which can be captured by
the camera. When the Auto Knee button on the MSU or
RCP panel is pressed, the ADSP circuitry automatically
optimizes both the knee point and knee slope for best
reproduction of the high lights. Auto Knee can also be
used in conjunction with The Adaptive Highlight
control function described later .
Figure 3-2-1: Auto Knee curve image
(3) Adaptive highlight control (Auto Knee mode)
Conventional cameras only have a single knee point/
slope characteristic. In contrast, the Sony ADSP
system has multiple knee point/slope characteristics.
The camera monitors the brightness of all areas of the
picture and adapts the knee point/slope for optimum
reproduction. A typical example is shooting an interior
scene which includes a sunlit exterior seen through a
window. This new function applies only to video levels
in excess of the knee point, the middle and low
luminance parts remaining unchanged, ensuring
camera matching is not impaired.
Figure 3-2-2: Knee curve image
Input signal level
Output signal level
white clip
auto slope
point limit
auto knee circuit
white clip
auto slope
knee point 0 knee point 1 knee point 2 knee point 3 knee point n
Output signal level
Intput signal level
........