This application note documents the filter specifications and detailed plots of the internal filters of the ADV7190/ ADV7191, ADV7192 and ADV7194 video encoders. All the above-mentioned devices provide two luma low-pass filters, two luma notch filters, an extended SSAF™ (Super Sub Alias Filter) luma low-pass filter, a luma CIF and a luma QCIF filter, five chroma low-pass filters, a Chroma CIF and a Chroma QCIF filter. The SSAF filter, as can be seen in Figure 5, provides a sharp stopband attenuation that enables studio quality video playback on modern TVs, giving optimal horizontal line resolution. Additionally, it is possible to change the response of the SSAF filter in the passband in using the programmable gain/attenuation feature or sharpness control as can be seen in Figures 6, 7 and 8. Overall, there are six programmable gain responses (Figure 7) and six programmable attenuation responses (Figure 8) in the range of –4 dB to +4 dB available. These responses can be programmed over the I2C® interface.
This document provides detailed filter specifications and frequency response plots for the internal filters of the ADV7190, ADV7191, ADV7192, and ADV7194 video encoders. It covers various filter types including luma low-pass, luma notch, extended SSAF, and chroma filters.
| Devices Covered | ADV7190/ADV7191/ADV7192/ADV7194 |
|---|---|
| Oversampling Modes | 2x and 4x |
This document provides filter specifications for the ADV7190, ADV7191, ADV7192, and ADV7194 video encoders.
The SSAF filter offers programmable gain and attenuation responses in the range of -4 dB to +4 dB.
The tables show filter specifications for both 2x oversampling and 4x oversampling modes.