參數(shù)資料
型號(hào): TVP5145
英文描述: NTSC/PAL/SECAM/Component Digital Video Decoder With Macrovision(TM) Detection
中文描述: 的NTSC / PAL / SECAM制式/分量數(shù)字視頻解碼器通過(guò)Macrovision(TM)的檢測(cè)
文件頁(yè)數(shù): 22/92頁(yè)
文件大?。?/td> 525K
代理商: TVP5145
2
6
f
Frequency
MHz
70
60
50
40
30
20
10
0
10
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
PAL SQP
3 dB
@ 1.55 MHz
NTSC SQP
3 dB
@ 1.29 MHz
ITU-R BT.601
3 dB
@ 1.42 MHz
A
f
Frequency
MHz
70
60
50
40
30
20
10
0
10
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
A
No Notch Filter
3 dB @ 1.29 MHz
Notch1
Filter
3 dB
@ 936 kHz
Notch3 Filter
3 dB @ 504 kHz
Notch2 Filter
3 dB
@ 767 kHz
Figure 2
6. Color Low-Pass Filter Frequency
Response
Figure 2
7. Color Low-Pass Filter With Notch
Filter Frequency Response, NTSC Square
Pixel Sampling
f
Frequency
MHz
70
60
50
40
30
20
10
0
10
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
A
Notch3
Filter
3 dB
@ 605 kHz
f
Frequency
MHz
70
60
50
40
30
20
10
0
10
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
A
No Notch Filter
3 dB @ 1.412 MHz
Notch3 Filter
3 dB @ 554 kHz
Notch2 Filter
3 dB @ 844 kHz
Notch1
Filter
3 dB
@ 1.03 MHz
No Notch Filter
3 dB @ 1.55 MHz
Notch2 Filter
3 dB @ 922 kHz
Notch1
Filter
3 dB
@ 1.13 MHz
Figure 2
8. Color Low-Pass Filter With Notch
Filter Characteristics, NTSC/PAL ITU-R BT.601
Sampling
Figure 2
9. Color Low-Pass Filter With Notch
Filter Characteristics, PAL Square Pixel
Sampling
2.2.3.2 Adaptive Comb Filter
Y/C separation may be done using adaptive 4-line (3-H delay), fixed 3-line, fixed 2-line comb filters, or a chroma trap
filter. Characteristics of 4-line and 3-line comb filters are shown in Figure 2
10. The filter frequency plots show that
both 4-line and 3-line (with filter coefficients [1,3,3,1]/8 and [1,2,1]/4) comb filters have zeros at 1/2 of the horizontal
line frequency to separate the interleaved Y/C spectrum in NTSC. The 4-line comb filter has less cross-luma and
cross-chroma noise due to slightly sharper filter cutoff. The 4-line comb filter with filter coefficients [1,1,1,1]/4 has
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