參數(shù)資料
型號(hào): TVP5031CPFP
廠商: Texas Instruments, Inc.
英文描述: Color Decoder Circuit
中文描述: 彩色解碼器電路
文件頁數(shù): 28/85頁
文件大?。?/td> 378K
代理商: TVP5031CPFP
2–12
2.4.1
Sampling Frequencies and Patterns
The sampling frequencies that control the number of pixels per line differ depending on the video format and
standards. Table 2–1 shows a summary of the sampling frequencies. The TVP5031 outputs data in the 4:2:2 sampling
pattern. Every second sample is both a luminance and chrominance sample. The remainder are luminance-only
samples.
Table 2–1. Summary of Line Frequencies, Data Rates, and Pixel Counts
STANDARDS
HORIZONTAL
LINE RATE
(kHz)
PIXELS
PER LINE
ACTIVE PIXELS
PER LINE
PCLK
FREQUENCY
(MHz)
SCLK
FREQUENCY
(MHz)
NTSC, square-pixel
15.73426
780
640
12.2727
24.54
NTSC, ITU-R BT.601
15.73426
858
720
13.50
27.00
PAL(B,D,G,H,I), square-pixel
15.625
944
768
14.75
29.50
PAL(B,D,G,H,I),ITU-R BT.601
15.625
864
720
13.50
27.00
PAL(M),square-pixel
15.73426
780
640
12.2727
24.54
PAL(M),ITU-R BT.601
15.73426
858
720
13.50
27.00
PAL(N),square-pixel
15.625
944
768
14.75
29.50
PAL(N),ITU-R BT.601
15.625
864
720
13.50
27.00
V0
= Luminance-Only Sample
U0
Y0
Y1
V1
U1
Y2
Y3
V2
U2
Y4
Numbering shown is for 13.5 MHz sampling
V358
U358
Y716
Y717
V359
U359
Y718
Y719
= Luminance and Chrominance Sample
Y5
Figure 2–21. 4:2:2 Sampling
2.4.2
Video Port 20-Bit and 16-Bit 4:2:2 Output Format Timing
Y0
SCLK
PREF
PCLK
Y[9:0]
Y1
Y2
Y3
Y4
Y5
Y719
Y718
Y717
Y716
U0
UV[9:0]
V0
U1
V1
U2
V2
V359
U359
V358
U358
Numbering shown is for 13.5 MHz sampling
Figure 2–22. 20-Bit 4:2:2 Output Format
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