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參數(shù)資料
| 型號(hào)： | LC749450NW |
| 廠(chǎng)商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Silicon Gate CMOS IC Digital RGB Image Processor IC |
| 中文描述： | 硅柵CMOS集成電路數(shù)字RGB圖像處理器芯片 |
| 文件頁(yè)數(shù)： | 3/17頁(yè) |
| 文件大?。?/td> | 81K |
| 代理商： | LC749450NW |
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No.8096-3/17
LC749450NW
(2) Cinema mode IP conversion (3:2 pull down)
When an NTSC interlaced signal that was generated by a film (cinema) source is input, it automatically recognizes
the signal as a cinema source and performs cinema mode IP conversion that is optimal for cinema sources.
The threshold value for that recognition can be set with a parameter.
(3) Noise reduction (2D, 3D)
The LC749450NW provides three noise reduction functions: 3D noise reduction, which reduces noise between
fields, 2D noise reduction, which reduces noise within the field, and 1D noise reduction, which reduces noise in
the scan line direction. This block contains the 3D and 2D noise reduction functions and can operate independently
for both the luminance signal and the chrominance signal.
(4) Cross color and cross luminance canceller
This circuit can reduce the cross color noise (rainbow-like color smearing) and cross luminance (dot) noise that is
generated when a decoder (such as a 3-line decoder) other than 3D YC separator decoder is used for NTSC input.
This function makes it possible to produce clear and vivid video with no color blotting and no dot interference.
3. Image quality adjustment block
The LC749450NW provides a full complement of image quality adjustment functions and can perform the image
quality adjustments required for optimal flat panel TV display.
(1) Horizontal outline correction (LTI/CTI)
The LTI/CTI block applies outline correction to the input signal. The apparent sharpness in the video image is
enhanced by increasing the slope of the input signal. Since this function does not add overshoot or undershoot to
edges in the video signal, it creates natural-looking images. This function operates independently on the luminance
and chrominance signals.
(2) Sharpness (horizontal and vertical)
The sharpness function can correct the outlines in the input signal. This function differs from the LTI/CTI function
described above in that it adds an appropriate peak in the corrected outline area. The amount of this peak and a
coring level that prevents fine noise from being aggravated can be set in the control registers for this circuit. This
function only operates on the luminance signal.
(3) Shadow adjuster
The shadow adjuster function detects the outlines in the input signal and adds an appropriate peak before and after
the outline to add an appearance of a shadow. This creates a video signal that is varied and not dull.
(4) White and black expansion
The white and black expansion function adaptively expands the white and black levels in the Y component of the
YCbCr signal using the white and black peak levels in the immediately preceding field, the luminance signal
average picture level (APL), distributional information, and microcontroller settings. The white and black peaks
are the maximum and minimum values in the input data within a single field. When the white and black expansion
function is used, the values of the settings must be set appropriately.
(5) White text correction (blue stretch)
The blue stretch function creates visually pleasing white text by adding a small amount of blue to white characters.
A gain adjustment is applied to section of the Y signal recognized as white text and added to the Cb signal.
(6) Flesh tone correction
The flesh tone correction function extracts just the set skin color without affecting other colors and allows just that
color to be adjusted.
(7) Hues and color gain adjustment
The hue adjustment adjusts the hue of the whole image. The color gain adjustment adjusts the depth of the color by
controlling the gain applied to the color difference signals. This function can adjust the Cb and Cr signals
independently.
Continued from preceding page.
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