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TDA4VM: TDA4VM

Michael Gavlin
Prodigy 60 points
Part Number: TDA4VM


Hi forum,

In order to improve the high-low beam functionality of our current project using the following HW: TDA4VM / AM62A with AR0234 sensor.

we require the capability to capture low-exposure frames. This will allow us to better distinguish between vehicles at far distances.
As a reference, please find the attached video demonstrating our need to distinguish between the headlights of distant vehicles more effectively.


Our preferred solution would be to generate short-exposure images in conjunction with the frames we are currently capturing, prior to their processing by the HDR combiner.

Is that can be done using TIOVX?
We would greatly appreciate a prompt response outlining the possibilities for implementing this feature, as well as any further steps necessary to move forward.
Thank you for your attention to this matter.
  • 0
    TI__Guru 62150 points

    Hi Michael,

    Michael Gavlin said:
    As a reference, please find the attached video

    Could you please share this video?

    Michael Gavlin said:
    Our preferred solution would be to generate short-exposure images in conjunction with the frames we are currently capturing,

    What is your current AR0234 output format?
    I don't have detailed information about AR0234.
    It seems to be a global shutter non-wdr sensor -- https://www.onsemi.com/products/sensors/image-sensors/ar0234cs

    Is this short-exposure image supposed to be in sensor raw RGGB format?

    Michael Gavlin said:
    Is that can be done using TIOVX?

    Do you mean using VISS H/W or with TIOVX S/W?

  • 0 in reply to Gang Hua
    Prodigy 60 points

    Hi Gang,

    Attached below is the video file 

    for ref.

    AR0234 video format is fmt:UYVY2X8/1920x1200.

    We can define the format of the image, we can use RGGB format also.

    Regarding the  VISS H/W or TIOVX S/W, I would appreciate your help with understanding how to grab these frames, as I am not familiar with the possibilities.

  • 0 in reply to Michael Gavlin
    TI__Guru 62150 points

    Hi Michael,

    I am not able to view or download the video file.
    Could you please zip it and attach it as a file?

    Michael Gavlin said:
    Our preferred solution would be to generate short-exposure images in conjunction with the frames we are currently capturing, prior to their processing by the HDR combiner.

    Could you please confirm if your AR0234 sensor supports HDR?
    I don't have that information as I mentioned above.

    Michael Gavlin said:

    AR0234 video format is fmt:UYVY2X8/1920x1200.

    I suppose there is an ISP in your AR0234 camera for TDA4 to receive YUV video.
    In this case, auto exposure and video output are done in the camera module and TDA4 may not be able to change video output or vary sensor exposure frame by frame.

  • 0 in reply to Gang Hua
    Prodigy 40 points

    Hi Gang,
    According to e-con the AR0234 camera does support HDR.
    I think what  was asking is if there is a SW way in TIOVX or any other module to seperate the even frames from the odd frames, since in HDR you have two frames that are combined to create the image from short exposure and from long exposure.
    Do you have some thing of the sort? even just a way to get the lower exposure frames would be good.
    Is that something that maybe the DCC tool can do? our issue with the DCC tool is that it is post process, but we can use that in the interim if there is no solution fro grabbing the low exposure frames in real time

  • 0 in reply to Dagan Levy
    TI__Guru 62150 points

    Hi Dagan,

    It looks like you want to control sensor exposure in a certain way.
    I suppose your AR0234 camera has an internal ISP and exposure control.
    Does the camera allow you to change the sensor exposure frame by frame?

    DCC tool is for ISP on TDA4 and it cannot control the AR0234 camera.