I will design a board which receives analog audio and video.
For the video, I want to use the ADV7188 chip to decode a PAL CVBS signal.
The chip seems really good but I have some questions about the HUM noise :
- What is the impact of the HUM noise on the decoded video output ?
- How to remove the HUM noise ? Is there a special schematic for this (hum filter) ?
For the audio, I want to use the ADAU1761. I have some questions :
- How to remove the HUM noise from analog audio source ?
- The input audio level of the board is -4dBm to +16dBm. What is the recommended circuit to handle this power range without quality loss ?
These points are very important for me,
Thanks in advance for your answers!