Methods and devices for compensating sag effect

A system for processing video signals received over an alternating current (AC)-coupled channel, the system comprising:

• a receiver logic, configured to:
• apply a first filter to the received video signal to generate a corrected video signal, wherein a transfer function of the first filter is dependent on a transmission parameter and wherein the transmission parameter is based on a plurality of parameters of the AC-coupled channel;
• apply a second filter to a signal based on the received video signal, where the second filter is a low-pass filter, to generate a low-pass filtered video signal;
• apply clamping to a signal based on the low-pass filtered video signal to generate a clamped video signal;
• generate timing information based on the clamped video signal;
• use the timing information to extract predefined content from the corrected video signal;
• adjust the transmission parameter based on a comparison of the extracted predefined content with expected predefined content;
• and
• use the adjusted transmission parameter for subsequent applications of the first filter.

A system for processing video signals received over an alternating current (AC)-coupled channel, the system comprising:

• a receiver logic, configured to:
• apply a filter to the received video signal to generate a corrected video signal, where a transfer function of the filter is dependent on a gain correction factor and a transmission parameter, where the gain correction factor is based on a ratio between a receiver-side resistance and a total resistance of the AC-coupled channel, and where the transmission parameter is based on a plurality of parameters of the AC-coupled channel;
• extract predefined content from the corrected video signal;
• adjust the transmission parameter based on a comparison of the extracted predefined content with expected predefined content;
• and
• use the adjusted transmission parameter for subsequent applications of the filter.