Newly Developed ASICs
Three VLSI(Very Large Scale Integration) chips have been developed by Ikegami for the digital process, digital encoder, and data rate converter IC's. Cutting-edge VLSI technology with 300,000 gates per chip, 3 volt power, and up to 60MHz sample frequency allows extended digital functions and performance with the equivalent power consumption of conventional analog circuits.
Video Processing by DSP
A single ASIC provides 16-bit video processing including funtions of flare correction, linear matrix, gamma correction, detail enhancement, knee, and auto iris.
Both camera head and base station incorporate the new digital encoder ASIC providing highly stable performance with NTSC encoded outputs available as standard at the camera as well as base station.
Standard with Digital Outputs
In addition to the full compliment of analog outputs, the system comes standard with four D1 serial component digital outputs from the base station.
This is accomplished by the developement of a data rate converter ASIC which changes the digital component video from CCD sample frequency to D1 sample frequency. The identical ASIC is used at the camera to convert the aspect ratio between 4:3 and 16:9 in the HK-388W and HK-388PW.
Combining Top Image Quality with Production Creativity
The HK-388 and HK-388P deliver high resolution, low noise image quality with a wide dynamic range and accurate color fidelity.
Due to the extensive use of digital circuits, top image quality is achieved in a consistent and easy manner. Also for production creativity, a wide range of state-of-the-art functions
can be selected to enhance the image quality.
Instant Switching between 4:3 and 16:9
By command from the MCP or from the external system, the camera will
instantly convert between 4:3 and 16:9 aspect ratios. Camera video is converted by digital process
eliminating the need for re-calibration of analog circuits or re-alignment of optical axis. The viewfinder
automatically follows the switching of the camera video.
New Super V
The New Super V mode for CCD operation allows the vertical resolution
to be increased in three increments from 400 to 480 TV Lines for frame capture and wide screen applications,
bridging the gap in vertical resolution between conventional and high definition performance.
Flexible Filter System
Both studio and portable camera types include dual motor driven 5-position
optical filter wheels and electronic color temperature correction so it is easy to satisfy production
requirements. Daylight color temperature can be corrected electronically
so optical filter positions are available for combined filter effects.
Dual Knee System
Both Pre Knee and Digital Knee Circuits are incorporated to handle
a wide dynamic range maintaining faithful color reproduction. The digital encoder includes Black
Stretch and Black Press to improve reproduction of high and low contrast scenes.
Extended Range Continuous Variable Speed Shutter
This unique system for FIT CCDs permits variable shutter operation
above and below 1/60 second so the camera can sync to slow scan or fast scan PC display monitors.
High shutter speeds, including continuously variable mode, are also available for sports applications.
True-to-Life Color Reproduction
The camera is equipped with a digital linear matrix circuit for accurate
colorimetry. For special applications the standard colorimetry can be changed via six function remote control
of the linear matrix as well as the overall Color Saturation remote control function.
The HK-388 and HK-388P employ high-density 520,000 pixel 2/3-inch FIT CCD image sensors.
The HK-388W and HK-388PW employ newly developed 640,000 pixel 2/3-inch FIT CCDS.
In the studio cameras, the CCD block is mounted on a bedplate with axis adjustment assuring perfect
optical alignment between zoom lens and CCD sensor.
New Level of Wide Screen Performance
The HK-388 and HK-388W, operating in 4:3, have the same resolution
performance. Owing to the 640,000 pixel CCD, however, the 16:9 performance of the HK-388W
establishes a new higher level of performance with greater modulation depth and true wide-screen angles-of-view.
Digital Detail Enhancement
Operating in the digital domain the DTL system provides 3-channel enhancement
for uniform sharpness of all colors. It includes.conventional as well as new digital
functions not possible in analog DTL systems.
Diagonal DTL derives an edge signal from the diagonal components of the video signal to enhance resolution.
Not only horizontal and vertical edges are influenced by the detail signal, but also diagonal edges. This key
function enables the HK-388 to provide a very natural image impression which can not be obtained with
conventional cameras. With the Diagonal DTL function, cross-color artifacts are reduced.
Slim DTL reduces edge thickness without changing the boost frequency of the edge signal. This permits
a fine edge which will not be attenuated by bandwidth limits in the path to the home receiver.
Skin DTL softens the facial complexions of the talent while retaining the detail in the rest of the scene.
The AHD (Auto Hue Detect) function facilitates Skin DTL adjustment to select a desired skin tone at the mere touch of a switch.
DTL Boost Frequency
The boost frequency of the horizontal edge signal can be shifted within the range of 3MHz to 8MHz.
Appropriate edge enhancement can be selected for different applications and different scenes.
DTL B-W Balance
The balance of sharpness between dark and bright areas can now be controlled by adding the DTL signal to video both before and after gamma.
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