參數(shù)資料
型號(hào)： TVP5146PFPG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 顏色信號(hào)轉(zhuǎn)換
英文描述： COLOR SIGNAL DECODER, PQFP80
封裝： GREEN, PLASTIC, HTQFP-80
文件頁(yè)數(shù)： 25/109頁(yè)
文件大?。?/td> 1658K
代理商： TVP5146PFPG4
14
SLES084C August 2007
TVP5146
2.2.2.2
Y/C Separation
Y/C separation can be done using adaptive 5-line (5-H delay) comb filters or a chroma trap filter.
The comb filter can be selectively bypassed in the luma or chroma path. If the comb filter is
bypassed in the luma path, then chroma trap filters are used which are shown in Figure 28
through Figure 211. TI’s patented adaptive comb filter algorithm reduces artifacts such as
hanging dots at color boundaries. It detects and properly handles false colors in high frequency
luminance images, such as a multiburst pattern or circle pattern. Adaptive comb filtering is the
recommended mode of operation.
40
35
30
25
20
15
10
5
0
5
10
01234567
f – Frequency – MHz
No Notch Filter
Notch 3 Filter
Notch 2 Filter
Amplitude
dB
Figure 28. Chroma Trap Filter Frequency
Response, NTSC Square Pixel Sampling
Notch 1 Filter
f – Frequency – MHz
40
35
30
25
20
15
10
5
0
5
10
01234567
No Notch Filter
Notch 3 Filter
Notch 1 Filter
Amplitude
dB
Figure 29. Chroma Trap Filter Frequency
Response, NTSC ITU-R BT.601 Sampling
Notch 2 Filter
40
35
30
25
20
15
10
5
0
5
10
01234567
Figure 210. Chroma Trap Filter Frequency
Response, PAL ITU-R BT.601 Sampling
Figure 211. Chroma Trap Filter Frequency
Response, PAL Square Pixel Sampling
f – Frequency – MHz
Amplitude
dB
No Notch Filter
Notch 2 Filter
Notch 1 Filter
Notch 3 Filter
f – Frequency – MHz
40
35
30
25
20
15
10
5
0
5
10
01234567
Amplitude
dB
No Notch Filter
Notch 2 Filter
Notch 1 Filter
Notch 3 Filter
相關(guān)PDF資料
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TVP5147M1PFPG4 COLOR SIGNAL DECODER, PQFP80
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TVP5147M1 制造商:TI 制造商全稱:Texas Instruments 功能描述:NTSC/PAL/SECAM 2x10-Bit Digital Video Decoder With Macrovision Detection, YPbPr Inputs, and 5-Line Comb Felter
TVP5147M1_08 制造商:TI 制造商全稱:Texas Instruments 功能描述:NTSC/PAL/SECAM 2x10-Bit Digital Video Decoder With Macrovision Detection, YPbPr Inputs, and 5-Line Comb Felter
TVP5147M1IPFP 功能描述:視頻 IC 10B Hi Qual Sgl-Chip Dig Video Decoder RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
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