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參數(shù)資料
| 型號(hào)： | SAA7130 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | PCI video broadcast decoder |
| 中文描述： | PCI視頻廣播解碼器 |
| 文件頁數(shù)： | 28/48頁 |
| 文件大?。?/td> | 196K |
| 代理商： | SAA7130 |
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2002 Apr 23
28
Philips Semiconductors
Product specification
PCI video broadcast decoder
SAA7130HL
7.6.6
V
IDEO SCALING
The SAA7130HL incorporates a filter and processing unit
to downscale or upscale the video picture in the horizontal
and vertical dimension, and in frame rate
(see Figs 11 and 12). The phase accuracy of the
re-sampling process is
1
64
of the original sample distance.
This is equivalent to a clock jitter of less than 1 ns. The
filter depth of the anti-alias filter adapts to the scaling ratio,
from 10 taps horizontally for scaling ratios close to 1 : 1, to
up to 74 taps for an icon sized video picture.
Most video capture applications will typically require for
downscaling. But some zooming is required for conversion
of ITU sampling to square pixel (SQP), or to convert the
240 lines of an NTSC field to 288 lines to comply with
CCITT video phone formats.
The scaling acquisition definition also includes cropping,
frame rate reduction, and defines the amount of pixels and
lines to be transported through DMA over the PCI-bus.
Two programming pages are available to enable
re-programmingofthescalerinthe‘shadow’oftherunning
processing, without holding or disturbing the flow of the
video stream. Alternatively, the two programming pages
can be applied to support two video destinations or
applications with different scaler settings, e.g. firstly to
capture video to CPU for compression (storage, video
phone), and secondly to pre-view the picture on the
monitor screen. A separate scaling region is dedicated to
capture raw VBI samples, with a specific sampling rate,
and be written into its own DMA channel.
handbook, full pagewidth
MHB997
active video area
video region
- cropped
- scaled
scaling
VBI DMA
video DMA (A)
e.g. interlaced
1st buffer (upper field)
2nd buffer (lower field)
VBI first sample
1st buffer (A)
2nd buffer (A)
VBI region, raw samples
VBI last sample
video first pixel
video last pixel
VBI last line
VBI first line
sample rate
1st field (odd, FID = 0)
active video area
video region
- cropped
- scaled
scaling
VBI region, raw samples
video last line
video first line
sample rate
2nd field (even, FID = 1)
Fig.11 Scaler processing with DMA interfacing.
The capture acquisition for scaling and DMA has separate programming
parameters for VBI and video region and associated DMA channels.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAA7134 | PCI audio and video broadcast decoder |
| SAA7135 | Single-chip, analog TV video/stereo DECODER |
| SAA7139 | The Digital Video Decoder/Encoder Modules(數(shù)字視頻譯碼器/編碼器模塊) |
| SAA7138 | The Digital Video Decoder/Encoder Modules(數(shù)字視頻譯碼器/編碼器模塊) |
| SAA7140A | High Performance Scaler HPS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAA7130HL | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:PCI video broadcast decoder |
| SAA7130HL/V1,518 | 功能描述:視頻 IC PCI 9-BIT VID DECODR 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 |
| SAA7130HL/V1,557 | 功能描述:視頻 IC PCI 9-BIT VID DECODR 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 |
| SAA7130HLBE | 功能描述:視頻 IC PCI 9-BIT VID DECODR 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 |
| SAA7130HLBE-T | 功能描述:視頻 IC PCI 9-BIT VID DECODR 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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