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what is the data format of 4-ch D1(PAL),BT.656,Line-interleaved mode about TVP5158?

Hi,
I'm developing tvp5158's driver with linux-2.6.32 on dm6467t board,now I need to demux the captured Superframe.But I'm still a little confused
about the data format of 4-ch D1(PAL),BT.656,Line-interleaved mode.
Q1:In 4Ch-D1(PAL)mode,the Superframe size is 728x2500(625x4),if it is stored on DDR2 as YUV422Semi-planar,what it will be?Like this ?

----------------------------------------|
|                                                    |
|      728x2500(Luma data)      |  (720 Y0,Y1,Y2,...,Y720,what's the other 8 bytes?)
|                                                    |
----------------------------------------|
|                                                    |
|     728x2500(Chroma Data)  |
|                                                    |
----------------------------------------|

if I want to demux the line-interleaved video,how to realize it?


Regards,
xiaoyu

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