Columbia CSEE 4840 - Video (3 pages)

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Pages:
3
School:
Columbia University
Course:
Csee 4840 - Embedded System Design
Embedded System Design Documents
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Television 1939 Du Mont Model 181 Vector Displays Video Prof Stephen A Edwards sedwards cs columbia edu Columbia University Spring 2006 Video p 1 12 Raster Scanning Video p 2 12 Raster Scanning Video p 4 12 Raster Scanning Video p 3 12 Raster Scanning Video p 4 12 Raster Scanning Video p 4 12 NTSC or RS 170 Originally black and white 60 Hz vertical scan frequency 15 75 kHz horizontal frequency 15 75 kHz 262 5 lines per field 60 Hz White 1V Black 0 075 V Blank 0V Sync 0 4 V Video p 4 12 Video p 4 12 Video p 5 12 A Line of B W Video Interlaced Scanning Interlaced Scanning White Black Blank Sync H Front Porch 0 02H Blanking 0 16H Sync 0 08H Back Porch 0 06H Video p 6 12 Interlaced Scanning Video p 7 12 Interlaced Scanning Video p 7 12 Interlaced Scanning Video p 7 12 Interlaced Scanning Video p 7 12 Interlaced Scanning Video p 7 12 Color Television Color added later had to be backwards compatible Solution continue to transmit a black and white signal and modulate two color signals on top of it RGB vs YIQ colorspaces 0 30 0 59 0 11 R Y 0 60 0 28 0 32 G I 0 21 0 52 0 31 B Q Y baseband 4 MHz black and white signal I as 1 5 MHz Q as 0 5 MHz at 90 modulated at 3 58 MHz Video p 7 12 Video p 7 12 Video p 8 12 International Standards lines Computer Video VGA active vertical aspect horiz lines res ratio res NTSC 525 484 242 4 3 427 29 94 Hz PAL 625 575 290 4 3 425 25 Hz SECAM 625 575 290 4 3 465 25 Hz PAL Uses YUV instead of YIQ flips phase of V every other line SECAM Transmits the two chrominance signals on alternate lines no quadrature modulation Video p 9 12 Detailed VGA Timing 640 480 60 Hz 25 175 MHz Dot Clock 31 469 kHz Line Frequency 59 94 Hz Field Frequency pixels role lines Front Porch 2 96 Horizontal Sync 2 40 Back Porch 8 8 640 Left border Active 25 8 480 8 Right border 8 800 total per line 525 1 2 3 4 5 Red Green Blue ID2 GND Mode Resolution Vertical Horizontal Pixel Clock 6 7 8 9 10 VGA 640 350 70 Hz 31 5 kHz 25 175 MHz RGND GGND BGND 5V GND VGA 640 400 70 Hz 31 5 kHz 25 175 MHz 11 12 13 14 15 VGA 640 480 59 94 Hz 31 469 kHz 25 175 MHz ID0 ID1 hsync vsync ID3 frame rate role Front Porch Vertical Sync Back Porch Top Border Active Bottom Border total per field Active low Horizontal and Vertical sync signals Video p 12 12 VGA Timing ID2 ID0 ID1 GND Monochrome 1024 768 GND Color 1024 768 GND GND Color 1024 768 SVGA 800 600 56 Hz 35 2 kHz 36 MHz SVGA 800 600 60 Hz 37 8 kHz 40 MHz SVGA 800 600 72 Hz 48 0 kHz 50 MHz XGA 1024 768 60 Hz 48 5 kHz 65 MHz SXGA 1280 1024 61 Hz 64 2 kHz 110 MHz HDTV 1920 1080i 60 Hz DDC1 ID2 Data from display UXGA 1600 1200 60 Hz 75 kHz 162 MHz vsync also data clock UXGA 1600 1200 85 Hz 105 77 kHz 220 MHz WUXGA 1920 1200 70 Hz 87 5 kHz 230 MHz DDC2 ID1 I2 C SDA ID3 I2 C SLC Video p 10 12 Video p 11 12


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