SDA9415 General Description
The SDA 9415 is the first single-chip Micronas MEGAVISION® feature box including scan rate conversion and the necessary field memories, a second input channel for split screen applications like picture-and-picture and digital-to-analog converters. The SDA 9415 has three application modes: the SRC (Scan Rate Conversion) mode, the SSC
(Split SCreen) mode and the MUP (MUlti Picture) mode.
The two input channels of the SDA 9415 are not equivalent. One input channel is always the so called "master" channel and one input channel is always the so called "slave" channel. Both channels are combined of the output side of the SDA 9415 in the "MUX" block. The master channel is always the "synchronization" master of both channels.
In the SRC mode the SDA 9415 can be used as a high performance scan rate converter. Scan rate conversion is done by a motion compensated algorithm known as Micronas VDU (Vector Driven Up conversion). In addition a high resolution frame based joint-linefree
picture-and-picture (maximum approximately 1/9 picture) can be displayed. The figure below shows an example of the SRC mode.
For this usage the 6 Mbit eDRAM core is separated in two luminance fields and two chrominance fields (either 4:2:0 or 4:1:1) and a memory area for luminance and chrominance fields (4:1:1) [maximum circa 1/9 picture] for picture-in-picture applications. The vector based scan rate conversion is possible for the master channel only.
For the SSC mode the 6 Mbit eDRAM core is split in two 3 Mbit areas, which are able to contain a maximum of two luminance fields and two chrominance fields (either 4:2:0 or 4:1:1). The figure below shows different applications ("Double window", "Zoom-in-zoomout"). In this case only a simple scan rate conversion (e.g. field doubling for interlaced conversion: AABB) for both output channels is possible.
The MUP mode allows the combination of one life picture and a configuration of still pictures. The figure below shows an application. In this case only a simple scan rate conversion (e.g. field doubling for interlaced conversion: AABB or AAAA) is possible.
The behaviour of the master and the slave channel does not differ in general. Therefore for further description of the master and the slave channel the figures are also valid for both unless it is pointed out.
SDA9415 Connection Diagram
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