Ticket Name: [TDA3] Stereo camera solution

Query Text:
Other Parts Discussed in Thread: TDA2 Dear we will develop stereo camera system in car sysem. Presently we select the TDA3 solution. But we are not sure whether you can use TDA3 that can meet the effectiveness of stereo camera. From TI ADAS SoC solution get 1. Stereo Front Camera Hight Level Block of of TDA2 can support stereo camera solution, but TDA3 doesn't have this. TDA3 is a cost-down solution, so we worry it cannot meet the stereo camera performance requirement. Can you check the TDA3 or you suggest to use TDA2? And tell me why is main reason. 2. From Stereo Front Camera Hight Level Block of TDA2 can see, you use a FPGA(optional) to link from camera IF to TDA2. Can you tell us what is his main function? If it is "must", who can provide this image of FPGA? Or TI has support this (or provide this SW code) Br. Ivan Wu ivan.wu@tungthih.com.tw

Responses:
Can I add a question? 3. About stereo camera, VIN1a and VIN2a of TDA3 can input the video signal of 2 camera at the same time?

You can interface up to four cameras through each VIN (Internally each VIN has 2 slices and each slice has 2 ports). I think what matters here is resolution, fps and data format of stream you are capturing. There shouldn't be any problem for two signals.

Hi, Yogesh Thank your response But I don't know can Camera 1 and Camera 2 be worked at the same time or they are use "Time division multiplexing"? Br. Ivan Wu

Hi Ivan, TDA3x can do stereo but the maximum resolution and the maximum number of disparities it can handle, will be less than what TDA2x can handle. What is the target resolution, frame rate and maximum disparity you are trying to achieve in your system ? regards, Victor Cheng

Hi, Victor Presently we would plan to use HD (720p) resolution, and this fps criteria should be defined at 30 ~ 60 fps. About this, do you have any suggestion? Br. Ivan Wu

Hi Ivan, For 720P, the maximum frame rate TDA3x can handle would be 7.5 fps with a maximum number of disparities of 32. regards, Victor Cheng

Ivan, If you have Vision SDK, you can refer to the data sheet under vision_sdk\docs. It explains stereo usecase in detail and how much processing is needed for 640x360@30 fps processing on TDA2x (Capture is still 1280 x 720 from two cameras on xCAM) this info can be used to extrapolate for tda3x in your case but as Victor said for tda3x 720p stereo would yield very low fps.

Hi Ivan Wu, The VIP in both TDA3x & TDA2x can receive multiple video streams. VIP1 & VIP2 are two separate instances of VIP. This allows SoC to receive multiple video streams simultaneously. Depending on the camera interface & other system needs (width of parallel port, display width, etc...) we can check on the feasibility. Regards, Sujith

Ivan, For that you either need external logic or use TDA's gpio's to sync between two camera using features provided by sensors. This is done on one of our reference designs but with TDA2x www.radiumboards.com/TI_TDA2x_Based_xCAM_Platform.php