10
0
10
0
Filter 2
−3 dB @ 767 kHz
PAL SQP −3 dB
@ 1.55 MHz
Filter 0
−3 dB @ 1.29 MHz
−10
−20
−30
−40
−50
−60
−70
−10
−20
−30
−40
−50
−60
−70
Filter 3
−3 dB @ 504 kHz
Filter 1
−3 dB
@ 936 kHz
ITU-R BT.601 −3 dB
@ 1.42 MHz
NTSC SQP −3 dB
@ 1.29 MHz
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
f − Frequency − MHz
f − Frequency − MHz
Figure 2−5. Color Low-Pass Filter With Filter
Frequency Response, NTSC Square Pixel
Sampling
Figure 2−4. Color Low-Pass Filter Frequency
Response
10
10
Filter 2
Filter 2
−3 dB @ 844 kHz
−3 dB @ 922 kHz
0
0
Filter 0
Filter 0
−3 dB @ 1.55 MHz
−3 dB @ 1.41 MHz
−10
−10
Filter 3
−3 dB
@ 605 kHz
Filter 3
−3 dB @ 554 kHz
−20
−30
−40
−50
−60
−70
−20
Filter 1
−3 dB
@ 1.03 MHz
Filter 1
−3 dB
@ 1.13 MHz
−30
−40
−50
−60
−70
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
f − Frequency − MHz
f − Frequency − MHz
Figure 2−7. Color Low-Pass Filter With Filter
Characteristics, PAL Square Pixel Sampling
Figure 2−6. Color Low-Pass Filter With Filter
Characteristics, NTSC/PAL ITU-R BT.601
Sampling
2−5
TI [ TEXAS INSTRUMENTS ]
