TDA4VH-Q1: About AE flicker

wang zhili

Part Number: TDA4VH-Q1

Tool/software:

Hi,

We found AE flicker problem as shown in video below:

I changed AE convergence interval and adjustment speed, which is shown below, but the effect was not very good, and the AE flicker remained, do you have a better way or a more recommended setting?

Thanks.

over 2 years ago

0 Gang Hua over 2 years ago

TI__Guru 67840 points

Hi Zhili,

wang zhili said:
We found AE flicker problem as shown in video below:

That looks like a relatively static scene and it may not require any AE adjustment.

Why is AE changing exposure in this case?

0 wang zhili over 2 years ago in reply to Gang Hua

Intellectual 935 points

Gang Hua said:
Why is AE changing exposure in this case?

That's what I'm trying to figure out. Besides AE, are there any other ISP-related ones that can cause this kind of flickering?

0 Gang Hua over 2 years ago in reply to wang zhili

TI__Guru 67840 points

wang zhili said:
That's what I'm trying to figure out. Besides AE, are there any other ISP-related ones that can cause this kind of flickering?

You may check if there is anything wrong with GLBCE settings or GLBCE context memory.

e.g., you may compare between GLBCE-on vs GLBCE-off to see if flickering happens both ways.

+1 wang zhili over 2 years ago in reply to Gang Hua

Intellectual 935 points

Hi Gang,

The reason for the flicker is that the AE does not converge in the highlight scene, which was resolved after modifying the convergence logic.

0 Gang Hua over 2 years ago in reply to wang zhili

TI__Guru 67840 points

Hi zhilii,

Thanks for the update!

Is this related to H3A input and/or output getting saturated in the highlight scenes?

0 wang zhili over 2 years ago in reply to Gang Hua

Intellectual 935 points

I'm not sure about this, I think it's more about AE convergence logic.

0 Gang Hua over 2 years ago in reply to wang zhili

TI__Guru 67840 points

OK, thanks!

I will close this thread as you don't have any further questions.

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TDA4VH-Q1: About AE flicker