Vybrid input video signal when flicker noise has occurred.

[takashitakahash]

Hi ncommunity.

Our customer has video signal flicker noise issues.

Input video signal to Vibrid When the video signal flicker has occurred.

Although I think that noise ゙ cause of the input signal, what  can reduce the noise by setting the register?

Also,  can I determine the effect by monitoring the value of the VDEC_NOISE?

[takashitakahash]

Hellow Karina-san.

Customer  has been improved that noise issues showed that with a 0.22μF input coupling capacity.

The recommended value of the Vybrid reference board is 0.022μF.

It is not a problem even with a 0.22μF.

Input is the NTSC signal from the camera.

[jiri-b36968 · Accepted solution]

Hello Takashi-san,

Please rephrase your reply and add some details. 0.22uF works or not?

On reference board is used 0.1uF.

/Jiri

[takashitakahash]

Customer using Integlity of GHS OS.

Hard ware is there own board.

Video signal is analog NTSC, it converting the built-in ADC to  the digital signal.

Symptoms is not a frame flicker, noise level (SN ratio) large, and  visible as noise is flickering.

[karina_valencia]

jiri-b36968​ can you continue with the follow up?

[jiri-b36968]

Hello Takashi-san,

Is the problem in video input signal or setting of the display is not correct?

Please add some details: Video of the issue, setting of VideoADC, parameters of the input signal and the noise, configuration of Vybrid, etc.

/Jiri

[karina_valencia]

takashitakahashi​ did you get previous comment?

[timesyssupport]

Hello Takashi,

Can you describe your customer's hardware and OS configuration?

Is this a Vybrid VF5xx based design? Is Linux running on this hardware, or another OS?

How is the video signal input connected to the hardware?

Thank you,

Timesys Support

[karina_valencia]

takashitakahashi​ did you get previous comment?

[karina_valencia]

timesyssupport​ can you attend this case?