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NTSC input for camera interface

Expert 1840 points

We are developing a board which support HDSDI (HD / FUll HD resolution, YUV, progressive), NTSC (YUV interlaced) input through camera interface. We are working with DVRDK V3.5 and DM8148 CPU. For HDSDI input, we have already modified the IMGS_OMNIVISION_OV10630 sensor, issdrv_captureAPI.c, iss_drv_isif.c, iss_drv_ipipe.c to support it. For the NTSC, we also created a similar driver which was named as IMGS_NTSC and modified issdrv_captureAPI.c, iss_drv_isif.c, iss_drv_ipipe.c to make them support 8bit, YUV422 video. In current time, the HDSDI has worked but NTSC has not. I guess the problem stay in 2 places:

1. HDSDI support progressive mode which has already existed as default for full feature user case but NTSC just work with interlaced mode. -> Please help me to figure out how to modify to support interlaced video input mode.

2. The setting of ISIF, Resizer, IPIPE to support HDSDI and NTSC are deferent. -> Please give me some references for that if you can.

I am really tired with these configurations, please give me a help if you can.