各种解析度的水平及垂直参数的参考设置

 

在HDTV 模式下各种解析度的水平及垂直参数的参考设置参考标准
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Notice:
HFP  =Horizontal sync Front porch (pixels)
HSW = Horizontal sync pulse width (pixels)
HBP  = Horizontal sync Back porch (pixels)
HF    = Horizontal sync frequency(KHz)
VFP  = vertical sync Front porch (pixels)
VSW = Vertical Sync pulse width (pixels)
VBP  = Vertical sync Back porch (pixels)
VF    = Vertical sync frequency(Hz)

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720x480p:
Generic timing details for 720x480:
HFP=76 HSW=40 HBP=100 HF=34KHz VFP=29 VSW=1 VBP=53 VF=60Hz
----------------------------------------------------
Widescreen 16:9
848x480p

Generic timing details for 848x480:
HFP=88 HSW=48 HBP=120 HF=34KHz VFP=28 VSW=1 VBP=54 VF=60Hz
----------------------------------------------------
Widescreen 16:9
856x480p

Generic timing details for 856x480:
HFP=87 HSW=48 HBP=121 HF=34KHz VFP=28 VSW=1 VBP=54 VF=60Hz
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Screen 4:3
1080x480p

Generic timing details for 1080x480:
HFP=108 HSW=48 HBP=164 HF=34KHz VFP=29 VSW=1 VBP=53 VF=60Hz
----------------------------------------------------
Screen 4:3
1440x480p

Generic timing details for 1440x480:
HFP=144 HSW=80 HBP=208 HF=34KHz VFP=29 VSW=1 VBP=53 VF=60Hz
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Screen 4:3
1800x480p

Generic timing details for 1800x480:
HFP=154 HSW=96 HBP=246 HF=34KHz VFP=32 VSW=1 VBP=50 VF=60Hz
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Screen 4:3
1800x540p

Generic timing details for 1800x540:
HFP=148 HSW=96 HBP=244 HF=34KHz VFP=7 VSW=1 VBP=15 VF=60Hz
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Screen 4:3
1920x540p

Generic timing details for 1920x540:
HFP=161 HSW=104 HBP=255 HF=34KHz VFP=7 VSW=1 VBP=15 VF=60Hz
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Screen 4:3
960x540p

Generic timing details for 960x540:
HFP=98 HSW=48 HBP=142 HF=34KHz VFP=7 VSW=1 VBP=15 VF=60Hz
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Powerstrip dongle 540P/1080i custom timings:
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Screen 4:3
640x480p HDTV

Generic timing details for 640x480:
HFP=143 HSW=48 HBP=169 HF=34KHz VFP=28 VSW=1 VBP=54 VF=60Hz
-------------------------------------------------------------------
Screen 4:3
720x480p HDTV

Generic timing details for 720x480:
HFP=72 HSW=48 HBP=88 HF=34KHz VFP=29 VSW=1 VBP=53 VF=60Hz
-------------------------------------------------------------------
Screen 4:3
856x480p HDTV

Generic timing details for 856x480:
HFP=88 HSW=48 HBP=120 HF=34KHz VFP=28 VSW=1 VBP=54 VF=60Hz
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Screen 4:3
1776x1000i HDTV

Generic timing details for 1776x1000:
HFP=136 HSW=48 HBP=240 kHz=34 VFP=42 VSW=5 VBP=78 Hz=30
interlace
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Screen 16:9
1920x1080i HDTV

Generic timing details for 1920x1080:
HFP=169 HSW=64 HBP=295 HF=34KHz VFP=20 VSW=5 VBP=20 VF=30Hz
interlace
------------------------------------------------------------------------------------
Screen 4:3
800x600i

Generic timing details for 800x600:
HFP=279 HSW=56 HBP=329 HF=34KHz VFP=250 VSW=1 VBP=274 VF =30Hz
interlace
-------------------------------------------------------
Screen 4:3
1024x768i

Generic timing details for 1024x768:
HFP=164 HSW=56 HBP=220 HF=34KHz VFP=160 VSW=1 VBP=196 VF=30Hz
interlace
--------------------------------------------------------
Screen 4:3
1152x864i

Generic timing details for 1152x864:
HFP=190 HSW=112 HBP=218 HF=34KHz VFP=112 VSW=1 VBP=148 VF=30Hz
interlace
-----------------------------------------------------------
Screen 4:3
1280x720i

Generic timing details for 1280x720:
HFP=125 HSW=120 HBP=139 HF=34KHz VFP=180 VSW=1 VBP=224 VF=30Hz
interlace
-----------------------------------------------------------
Screen 4:3
1280x768i

Generic timing details for 1280x768:
HFP=138 HSW=96 HBP=166 HF=34KHz VFP=156 VSW=1 VBP=200 VF=30Hz
interlace
--------------------------------------------------------------
Screen 4:3
1280x960i

Generic timing details for 1280x960:
HFP=128 HSW=96 HBP=160 HF=34KHz VFP=44 VSW=1 VBP=120 VF=30Hz
interlace
----------------------------------------------------------------
Screen 4:3
1280x1024i

Generic timing details for 1280x1024:
HFP=127 HSW=96 HBP=161 HF=34KHz VFP=43 VSW=3 VBP=55 VF=30Hz
interlace
----------------------------------------------------------------
Screen 4:3
1440x960i

Generic timing details for 1440x960:
HFP=140 HSW=104 HBP=180 HF=34KHz VFP=60 VSW=1 VBP=104 VF=30Hz
interlace
------------------------------------------------------------------
Screen 4:3
1600x900i

Generic timing details for 1600x900:
HFP=159 HSW=80 HBP=249 HF=34KHz VFP=89 VSW=3 VBP=133 VF=30Hz
interlace
-----------------------------------------------------------------
Screen 4:3
1776x1000i

Generic timing details for 1776x1000:
HFP=166 HSW=88 HBP=274 HF=34KHz VFP=44 VSW=5 VBP=76 VF=30Hz
interlace
------------------------------------------------------------------
Screen 4:3
1920x1080i

Generic timing details for 1920x1080:
HFP=180 HSW=144 HBP=244 HF=34KHz VFP=24 VSW=2 VBP=20 VF=30Hz
interlace
***************************************
480p timings
***************************************
Screen 4:3
640x480p

Generic timing details for 640x480:
HFP=55 HSW=96 HBP=57 HF=32KHz VFP=11 VSW=5 VBP=29 VF=60Hz
-------------------------------------------------------
Screen 4:3
720x480p

Generic timing details for 720x480:
HFP=67 HSW=96 HBP=85 HF=32KHz VFP=21 VSW=5 VBP=19 VF=60Hz
--------------------------------------------------------
Screen 4:3
1440x480p

Generic timing details for 1440x480:
HFP=118 HSW=144 HBP=218 HF=32KHz VFP=13 VSW=5 VBP=27 VF=60Hz
--------------------------------------------------------

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Developing a Resolution:

Creating and Editing a resolution are nearly identical operations, which involve identical parameter entry windows. "Creating" a resolution pre-fills the parameter entries with the numbers required to make a standard XGA resolution. "Editing" a resolution allows the user to choose a starting set of numbers to pre-fill the parameter entries from an existing resolution. Since both of these modes follow the same set of rules, we will treat them the same. Here are the steps required to create a useful resolution:

1) Gather the timing information for the display resolution you want to create. This information describes the timing of the video and synchronization signals that your display needs to function properly. This timing information is usually described in terms of "dots" or "pixels" when referring to the horizontal timing parameters and "lines" for the vertical parameters. You will also need to know the screen or vertical refresh rate (50-85Hz), the video output mode (RGB or YPrPb), the sync requirements (H&V, Sync on green, OR sync on Y), and the H&V sync polarities (-/-, -/+, +/-, +/+). Don't proceed to the next step until you have this information!

Specific information you must know includes:

Horizontal Total  (Dots)               Vertical Total  (Lines)
Horizontal Active  (Dots)              Vertical Active  (Lines)
Horizontal Sync Width  (Dots)       Vertical Sync Width  (Lines)
Horizontal Back Porch  (Dots)        Vertical Back Porch  (Lines)
Sync Polarity  (+/-)  Output Mode  (RGB or YrPrPb or YUV)
Refresh Rate  Hz     

Horizontal Total:

This parameter describes the total number of pixels or "dots" on a line. This value includes the pixels you can see, and the pixels you can't see. Currently, this value must be between 800 and 2047, which are the practical limits.

Horizontal Active:

This parameter describes the total number of pixels or "dots" on a line that you CAN see. It does not include the pixels in the blanking period (which contains the front porch, back porch and sync width). This value must be less than 2046.

Horizontal Sync Width:

This parameter is the number of pixels that define the width of the sync pulse. (The sync pulse is the signal that tells the display it has reached the end of the line and should start a new line.) This value must be greater than 4 and less than (HTotal - HActive - 2).

Horizontal Back Porch:

This parameter is the number of pixels that define the gap between the end of sync and the start of active video. This value must be between 1 and (HTotal - HActive) - (HSyncWidth) - 1.

Horizontal Front Porch:

Why isn't there a box for Horizontal Front Porch? Well, once you know the above four values, you already know the value of the front porch!

Vertical Total:

This parameter describes the total number of lines in a complete video frame. This value includes the lines you can see, and the lines you can't see. Currently, this value must be less than 2047.

Vertical Active:

This parameter describes the total number of lines that you CAN see. It does not include the lines in the blanking period (which contains the front porch, back porch and sync width). This value must be less than 2046.

Vertical Sync Width:

This parameter is the number of lines that define the width of the sync pulse. (The sync pulse is the signal that tells the display it has reached the end of the video frame and should start a new frame.) This value must be less than (VTotal - VActive - 2).

Vertical Back Porch:

This parameter is the number of lines that define the gap between the end of sync and the start of active video. This value must be less than (VTota l- VActive) - (VSyncWidth).

Vertical Front Porch:

Why isn't there a box for Vertical Front Porch? Well, once you know the above four values, you already know the value of the front porch!

Sync Polarity:

The sync polarity describes whether the sync pulse goes negative or positive. Most displays have specific settings that they will accept for certain resolutions, and often this forms a method of signaling the display what the resolution should be. Each sync, H and V, can be set independently to be positive or negative.

Output Mode:

Displays can generally accept RGB and/or YPrPb inputs. Your display may accept both types of inputs, but often there are restrictions on aspect ratios and resolutions, so research this closely.

Refresh Rate:

Currently can run at the following 5 refresh rates: 50Hz, 60Hz, 72Hz, 5Hz and 85Hz. 50Hz, 60Hz, and 75Hz are recommended output frequencies for 50Hz input sources (PAL), and 60Hz ,72Hz and 85Hz are recommended for 60Hz input sources (NTSC).

Note: NTSC input is actually at 59.94Hz, so the output is locked to the input at 59.94Hz, and the 72Hz version is actually (59.94Hz * (60/50) = 71.93Hz). PAL inputs are true 50Hz inputs, so when using a PAL input, the outputs are true 50Hz, 60Hz (60/50 * 50Hz), and 75Hz ((75/50) * 50Hz).

Note: While the output at 72Hz and 75Hz, the user must be careful when choosing these frequencies. Most new display devices (LCD and DLP projectors, plasma panels, etc.) try to lock the actual display to the input signal as long as the frequency is near the "sweet spot" of the unit (which is often 50 or 60Hz). Often, a display that can accept a 75Hz input, will actually perform frame rate conversion on the image, and bring the frequency back down to around 60Hz. Any form of frame rate conversion results in either the loss of existing frames or the replication of frames. When the CenterStage increases the frequency of the output to 72 or 75Hz, it does this by replicating frames as required. If a Display device decreases the frequency of an input, it must do this by deleting frames as required. Since one cannot guarantee that the display device will delete the same frame that was replicated by the processor, the frames seen by the viewer can have duplicate frames and missing frames, resulting in a "stuttering" image which is typically known as "judder". Displays that do not have frame rate conversion, like CRTs, are less prone to this effect. In any case, choose your refresh rate carefully, and be aware that this choice will affect the image that you view!

Hints:

1)?Changing the "Back Porch" value will move the image left or right (Horizontal setting) or up and down (Vertical setting). Keep in mind that changing the "Back Porch" number also changes the front porch number.

"TOTAL" = "ACTIVE" + "SYNC WIDTH" + "BACK PORCH" + FRONT PORCH"

2)?Changing the "Active" lines or pixels setting will increase or decrease the height or width of the active video. Sometimes adjusting the "Total" number will change this as well, but this can be dangerous, as it changes the fundamental timing of the configuration.

3)?If you see faint vertical stripes or bands when using a pixelated display (LCD, DLP, Plasma, etc., NOT a CRT), this is caused by the display sampling the video at a slightly different rate than the CenterStage is outputting it. Sometimes on the line, the pixel is sampled perfectly, and other times it may be sampled at the transition between one pixel and another. This can generally be cured by adjusting the "Active" number of pixels up or down

or adjusting the total number of pixels per line in the projector or display.

?If you cannot adjust this parameter in the projector or display, you will need to create a custom resolution for CenterStage. You can tune it exactly by following the steps below:

Put a pattern on the screen that makes the banding easiest to see. Count the number of bands you see over the width of the display. This number is approximately the number of pixels you want to decrease or increase in the "Horiz Active" box.
Increase or decrease the "Horiz Active" pixels on the display. Recount the number of bands, and compare it with the previous count. If the number of bands is reduced, you are changing "Active" in the proper direction, if they increase, you are changing in the wrong direction.
When the "Horiz Active" number is set correctly, the bands should disappear.