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MN1959041 Datasheet(PDF) 7 Page - Panasonic Semiconductor

Part No. MN1959041
Description  COMMERCIAL MPEG-4 VIDEO CODEC IC FOR W-CDMA MOBILE VISUAL TERMINALS
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Maker  PANASONIC [Panasonic Semiconductor]
Homepage  http://www.panasonic.com/industrial/
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MN1959041 Datasheet(HTML) 7 Page - Panasonic Semiconductor

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MN1959041
7
SDM00008AEM
s Functional Description (continued)
5. MIF (Memory Interface) Block (continued)
Table 5. Internal DRAM Structure
6. VIF (Video Interface) Block
MN1959041 includes the VIF block as the interface that passes image data between the IC and the image sensor and
the LCD display.
The VIF input system provides functions for acquiring, at the stipulated frame rate, CIF or QCIF images sent from
an external image sensor at 15 fps, and storing those images in working memory (internal DRAM) as object images
for encoding.
The VIF output system provides functions for output of images encoded internally in the IC for LCD display at 60
fps. It also provides image size conversion from QCIF to CIF, mosquito noise elimination filter execution as required
for QCIF images, functions for subscreen generation and display at lower right of the main screen, and a cursor
display function.
In the VIF block, video images are processed in YCbCr format, and graphics images are processed in RGB format.
The VIF block supports two screen display modes. The first is a full-screen mode that displays all of the image data
in the CIF size on the LCD, and the other is a window display mode in which an arbitrary part (176
× 220) of the CIF
size output from the VIF is displayed on the LCD. Actual output to the LCD is performed through the Visual ASIC
block.
7. Visual ASIC Block
The Visual ASIC block takes the video and graphics data output from the VIF block as input, synthesizes the final
images, and adjusts the image. The features of the Visual ASIC block are listed below.
• IIC (Inter IC) interface (Conforms to Version 2.0, standard and fast mode)
• Video signal format conversion function (YCbCr 4:2:2 → RGB, can be stopped when not needed.)
• Graphics overlay function (Either post RGB conversion or post dithering can be selected.)
• Video signal adjustment functions: outline enhancement, tint, color gain, brightness, contrast, and gamma adjust-
ment
• Dithering function for pseudo 24-bit color (2 × 2 matrix)
• Monochrome conversion function (Either monochrome or sepia can be specified.)
• Allows moving the display area (a 176-pixel × 220-line area placed anywhere within a 352-pixel × 288-line im-
age)
• Provides a 4-format LCD connection interface.
• YCbCr 4:2:2 test image generation function (75% color bar, horizontal/vertical stripe, arbitrary brightness/color
difference)
• Camera reset control function
Work Memory
Frame Memory
Capacity
16M-bit (4M-bit
× 4)
2 M-bit
× 2
Bus width
16-bit
64-bit
Transfer speed
53.76 MHz
53.76 MHz
Use
Used by the MP.
Used by the VIF for video and graphics.


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