參數資料
型號: ADV7183B
廠商: Analog Devices, Inc.
英文描述: Multiformat SDTV Video Decoder
中文描述: 標清多格式視頻解碼器
文件頁數: 29/100頁
文件大?。?/td> 844K
代理商: ADV7183B
ADV7183B
The filter plots in
180H
Figure 12 show the S-VHS 1 (narrowest) to
S-VHS 18 (widest) shaping filter settings.
181H
Figure 14 shows the
PAL notch filter responses. The NTSC-compatible notches are
shown in
182H
Figure 15.
Rev. B | Page 29 of 100
0
–10
–20
–30
–40
–50
–60
–70
0
10
8
6
4
2
12
FREQUENCY (MHz)
COMBINED Y ANTIAY RESAMPLE
A
0
Figure 12. Y S-VHS Combined Responses
COMBINED Y ANTIALY RESAMPLE
0
–20
–40
–60
–80
–100
–120
0
10
8
6
4
2
12
FREQUENCY (MHz)
A
0
Figure 13. Y S-VHS 18 Extra Wideband Filter (CCIR 601 Compliant)
COMBINED Y ANY RESAMPLE
0
–10
–20
–30
–40
–50
–60
–70
0
10
8
6
4
2
12
FREQUENCY (MHz)
A
0
Figure 14. PAL Notch Filter Response
0
–10
–20
–30
–40
–50
–60
–70
0
10
8
6
4
2
12
FREQUENCY (MHz)
COMBINED Y ANTY RESAMPLE
A
0
Figure 15. NTSC Notch Filter Response
CHROMA FILTER
Data from the digital fine clamp block is processed by three sets
of filters. The data format at this point is CVBS for CVBS inputs,
chroma only for Y/C, or U/V interleaved for YPrPb input
formats.
Chroma Antialias Filter (CAA). The ADV7183B over-
samples the CVBS by a factor of 2 and the Chroma/PrPb
by a factor of 4. A decimating filter (CAA) is used to
preserve the active video band and to remove any out-of-
band components. The CAA filter has a fixed response.
Chroma Shaping Filters (CSH). The shaping filter block
(CSH) can be programmed to perform a variety of low-
pass responses. It can be used to selectively reduce the
bandwidth of the chroma signal for scaling or
compression.
Digital Resampling Filter. This block is used to allow
dynamic resampling of the video signal to alter parameters
such as the time base of a line of video. Fundamentally, the
resampler is a set of low-pass filters. The actual response is
chosen by the system without user intervention.
The plots in
183H
Figure 16 show the overall response of all filters
together.
相關PDF資料
PDF描述
ADV7183BBSTZ Multiformat SDTV Video Decoder
ADV7183BKSTZ Multiformat SDTV Video Decoder
ADV7183KST Advanced Video Decoder with 10-Bit ADC and Component Input Support
AD7183 Advanced Video Decoder with 10-Bit ADC and Component Input Support
ADV7185 Professional NTSC/PAL Video Decoder with 10-Bit CCIR656 Output
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