TVP5146PFP 参数 Datasheet PDF下载

CVBS/Y

Line

Delay

−

Peaking

Delay

Y

SECAM Luma

NTSC/PAL

Remodulation

Contrast

Brightness

Saturation

Adjust

Notch

Filter

Y

Cb

Cr

CVBS

SECAM

Color

Demodulation

U

Color LPF

↓

2

Notch

Filter

Burst

Accumulator

(U)

Burst

Accumulator

(V)

5-Line

Adaptive

Comb

Filter

Notch

Filter

Notch

Filter

Delay

U

V

CVBS/C

NTSC/PAL

Demodulation

Color LPF

↓

2

Delay

V

Figure 2−3. Composite and S-Video Processing Block

2.2.2.1 Color Low-Pass Filter

High filter bandwidth preserves sharp color transitions and produces crisp color boundaries. However, for video

sources that have asymmetrical U and V side bands, it is desirable to limit the filter bandwidth to avoid UV crosstalk.

The color low-pass filter bandwidth is programmable to enable one of the three notch filters. Figure 2−4 through

Figure 2−7 represent the frequency responses of the wideband color low-pass filters.

2−4