參數(shù)資料
型號(hào)： TVP5150PBS
廠商： TEXAS INSTRUMENTS INC
元件分類： 顏色信號(hào)轉(zhuǎn)換
英文描述： COLOR SIGNAL DECODER, PQFP32
封裝： PLASTIC, TQFP-32
文件頁(yè)數(shù)： 9/68頁(yè)
文件大?。?/td> 917K
代理商： TVP5150PBS
Functional Description
11
May 2006
SLES043A
3.8
Luminance Processing
The luma component is derived from the composite signal by subtracting the remodulated chroma information.
A line delay exists in this path to compensate for the line delay in the adaptive comb filter in the color processing
chain. The luma information is then fed into the peaking circuit, which enhances the high frequency
components of the signal as shown in Figure 36.
f Frequency MHz
1
0
1
2
3
4
5
6
7
01234567
Gain = 0
Gain = 2
Gain = 1
Gain = 0.5
Peak at
f = 2.40 MHz
Amplitude
dB
Figure 36. Peaking Filter Response, NTSC/PAL ITUR BT.601 Sampling
3.9
Chrominance Processing
For PAL/NTSC formats, the color processing begins with a quadrature demodulator extracting U and V
components from the composite signal. The U/V signals then pass through the gain control stage for chroma
saturation adjustment. An adaptive comb filter is applied to both U and V to eliminate cross-chrominance
noise. Hue control is achieved with phase shift of the digitally controlled oscillator. An automatic color killer
circuit is also included in this block. The color killer suppresses the chroma processing when the color burst
of the video signal is weak or not present.
3.10 Timing Processor
The timing processor is a combination of hardware and software running in the internal microprocessor that
serves to control horizontal lock to the input sync pulse edge, AGC and offset adjustment in the analog front
end, vertical sync detection, and Macrovision
t detection.
3.11 VBI Data Processor
The TVP5150 VBI data processor (VDP) slices various data services like Teletext (WST, NABTS), Closed
Caption (CC), wide screen signaling (WSS), etc. These services are acquired by programming the VDP to
enable a standard(s) in the vertical blank interval. The results are stored in a FIFO and/or registers. The
Teletext results are stored in a FIFO only. Listed in Table 31 is a summary of the types of vertical blank interval
data supported according to the video standard. It supports ITUR BT. 601 sampling for each. Thirteen
standard modes are currently supported.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TVP5150PBS 制造商:Texas Instruments 功能描述:IC DECODER VIDEO SMD
TVP5150PBSG4 功能描述:視頻 IC VERY LOW POWER 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
TVP5150PBSR 功能描述:視頻 IC Very Low Power 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
TVP5150PBSRG4 制造商:Texas Instruments 功能描述:
TVP5151 制造商:TI 制造商全稱:Texas Instruments 功能描述:Ultralow-Power NTSC/PAL/SECAM Video Decoder
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