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參數(shù)資料
| 型號(hào)： | SAA7114 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | PAL/NTSC/SECAM video decoder with adaptive PAL/NTSC combfilter, VBI-data slicer and high performance scaler |
| 中文描述： | PAL / NTSC制式/ SECAM視頻解碼器與自適應(yīng)PAL / NTSC制式梳狀濾波器，供血，數(shù)據(jù)限幅器和高性能縮放器 |
| 文件頁(yè)數(shù)： | 42/147頁(yè) |
| 文件大?。?/td> | 759K |
| 代理商： | SAA7114 |
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2004 Mar 03
42
Philips Semiconductors
Product specification
PAL/NTSC/SECAM video decoder with adaptive PAL/NTSC
comb filter, VBI data slicer and high performance scaler
SAA7114
In VBI pass through operation the processing of prescaler
and vertical scaling has to be set to no-processing,
however, the horizontal fine scaling VPD can be activated.
Upscaling (oversampling, zooming), free of frequency
folding, up to a factor of 3.5 can be achieved, as required
by some software data slicing algorithms.
These raw samples are transported through the image
port as valid data and can be output as Y only format. The
lines are framed by SAV and EAV codes.
8.3.1
A
CQUISITION CONTROL AND TASK HANDLING
(
SUBADDRESSES
80H, 90H, 91H, 94H
TO
9FH
AND
C4H
TO
CFH)
The acquisition control receives horizontal and vertical
synchronization signals from the decoder section or from
the X port. The acquisition window is generated via pixel
and line counters at the appropriate places in the data
path. From X port only qualified pixels and lines (lines with
qualified pixel) are counted.
The acquisition window parameters are as follows:
Signal source selection regarding input video stream
and formats from the decoder, or from X port
(programming bits SCSRC[1:0] 91H[5:4] and FSC[2:0]
91H[2:0])
Remark
: The input of raw VBI data from the internal
decoder should be controlled via the decoder output
formatter and the LCR registers; see Section 8.2
Vertical offset defined in lines of the video source,
parameter YO[11:0] 99H[3:0] 98H[7:0]
Vertical length defined in lines of the video source,
parameter YS[11:0] 9BH[3:0] 9AH[7:0]
Vertical length defined in number of target lines, as a
result of vertical scaling, parameter YD[11:0] 9FH[3:0]
9EH[7:0]
Horizontal offset defined in number of pixels of the video
source, parameter XO[11:0] 95H[3:0] 94H[7:0]
Horizontal length defined in number of pixels of the
video source, parameter XS[11:0] 97H[3:0] 96H[7:0]
Horizontal destination size, defined in target pixels after
fine scaling, parameter XD[11:0] 9DH[3:0] 9CH[7:0].
The source start offset (XO11 to XO0 and YO11 to YO0)
opens the acquisition window, and the target size
(XD11 to XD0 and YD11 to YD0) closes the window,
however the window is cut vertically if there are less output
lines than expected. The trigger events for the pixel and
line counts are the horizontal and vertical reference edges
as defined in subaddress 92H. The task handling is
controlled by subaddress 90H; see Section 8.3.1.2.
8.3.1.1
Input field processing
The trigger event for the field sequence detection from
external signals (X port) are defined in subaddress 92H.
From the X port the state of the scalers H reference signal
at the time of the V reference edge is taken as field
sequence identifier FID. For example, if the falling edge of
the XRV input signal is the reference and the state of XRH
input is logic 0 at that time, the detected field ID is logic 0.
The bits XFDV[92H[7]] and XFDH[92H[6]] define the
detection event and state of the flag from the X port. For
the default setting of XFDV and XFDH at ‘00’ the state of
the H-input at the falling edge of the V-input is taken.
The scaler directly gets a corresponding field ID
information from the SAA7114 decoder path.
The FID flag is used to determine whether the first or
second field of a frame is going to be processed within the
scaler and it is used as trigger condition for the task
handling (see bits STRC[1:0] 90H[1:0]).
According to ITU 656, when FID is at logic 0 means first
field of a frame. To ease the application, the polarities of
the detection results on the X port signals and the internal
decoder ID can be changed via XFDH.
As the V-sync from the decoder path has a half line timing
(due to the interlaced video signal), but the scaler
processing only knows about full lines, during 1st fields
from the decoder the line count of the scaler possibly shifts
by one line, compared to the 2nd field. This can be
compensated for by switching the V-trigger event, as
defined by XDV0, to the opposite V-sync edge or by using
the vertical scalers phase offsets. The vertical timing of the
decoder can be seen in Figs 22 and 23.
As the H and V reference events inside the ITU 656 data
stream (from X port) and the real-time reference signals
from the decoder path are processed differently, the
trigger events for the input acquisition also have to be
programmed differently.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAA7115 | PAL/NTSC/SECAM Video Decoder with Adaptive PAL/NTSC Comb Filter, High Performance Scaler, I2C Sliced Data Readback and SQ PIXEL OUTPUT |
| SAA7116 | Digital Video to PCI Interface |
| SAA7116H | Video Converter Circuit |
| SAA7145 | |
| SAA7146 | |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAA7114E | 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:PAL/NTSC/SECAM video decoder with adaptive PAL/NTSC comb filter, VBI data slicer and high performance scaler |
| SAA7114E/V2,518 | 功能描述:視頻 IC DIGITAL VIDEO DECODER W/COMB F 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 |
| SAA7114H | 制造商:NXP Semiconductors 功能描述: 制造商:Philips Semiconductor 功能描述: |
| SAA7114H/V2 | 制造商:NXP Semiconductors 功能描述:7114H/V2557 |
| SAA7114H/V2,518 | 功能描述:視頻 IC DIGITAL VIDEO DECODER W/COMB F 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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