Datasheet

TVP5150AM1
SLES209E–NOVEMBER 2007–REVISED OCTOBER 2011 www.ti.com
Figure 3-2. Chrominance Trap Filter Frequency Figure 3-3. Chrominance Trap Filter Frequency
Response, NTSC ITU-R BT.601 Sampling Response, PAL ITU-R BT.601 Sampling
3.4 Color Low-Pass Filter
In some applications, it is desirable to limit the Cb/Cr bandwidth to avoid crosstalk. This is especially true
in case of video signals that have asymmetrical Cb/Cr sidebands. The color LP filters provided limit the
bandwidth of the Cb/Cr signals. Color LP filters are needed when the comb filtering turns off, due to
extreme color transitions in the input image. See Section 3.21.25, Chrominance Control #2 Register, for
the response of these filters. The filters have three options that allow three different frequency responses
based on the color frequency characteristics of the input video as shown in Figure 3-4.
Figure 3-4. Color Low-Pass Filter with Filter Characteristics, NTSC/PAL ITU-R BT.601 Sampling
12 Functional Description Copyright © 2007–2011, Texas Instruments Incorporated
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