Tuning the Low Pass Filter Feature

This section describes how to tune the Low Pass Filter feature to control the low-pass filters (LPFs) of the sharpness module within a DC9400.

Before you begin

Make sure:

The details view contains the Low Pass Filter table for sharpness.
To tune this feature, you need to choose DC9400 > Sharpness > Low Pass Filter in the Features view. For more details, see Tuning a DC9400 Feature.

Figure 1. Low Pass Filter Table for Sharpness

Note: Lpf0 corresponds to LPF 1, Lpf1 corresponds to LPF 2, and Lpf2 corresponds to LPF3. For details about these LPFs, see Vivante DC9400 Hardware Architecture and Features.
A VTunerServer is accessible.
For information about how to set up a connection to a VTunerServer, see Setting Up a Connection to a VTunerServer.

Next to Sharp Lpf Coef for each LPF, click View/Edit this Table and edit the coefficients in the prompted dialog.

The LPF performs filtering based on the coefficients specified in the table as shown in Figure 2.

You can use one of the following methods to update each Low Pass Filter table:

Double-click and edit a cell in the table to update a single value.
Click Edit and update the values in the prompted Edit Table dialog.
The values must be specified in the same order as the table columns and separated by a comma (,).
Click Export to export the values to a .csv file, edit the file, and then import the updated values from the .csv file.
The order of the values in the exported .csv file is the same as that in the table.