tvsummary - Frame Half Picture/ Odd Field Half Picture/...

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Image Compression in Analog TV System Given Resolution = 780(H) x 585(V) Frame Rate = 50 pictures/second Number of cycles per line = 0.5 x 780 = 390 Number of cycles per frame = 390 x 585 = 228150 Number of cycles per second = 228150 x 50 = 11407500 Bandwidth = 11.4MHz for monochrome picture Bandwidth = 34.2MHz for color picture (about 36MHz) Channel Bandwidth =6MHz for color picture A compression of about 6 times is necessary
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Color Picture/ Frame 25 frames/sec BW=36 MHz
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Color Picture/ Frame Half Picture/ Odd Field Half Picture/ Even Field 25 frames/sec BW=36 MHz 50 fields/sec BW=18MHz
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Color Picture/ Frame Half Picture/ Odd Field Half Picture/ Even Field R G B R G B 25 frames/sec BW=36 MHz 50 fields/sec BW=18MHz 50 fields/sec BW=18MHz
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Color Picture/ Frame Half Picture/ Odd Field Half Picture/ Even Field R G B R G B Y U V Y U V Frequency Interleaving Frequency Interleaving Composite Video Signal Composite Video Signal 25 frames/sec BW=36 MHz 50 fields/sec BW=18MHz 50 fields/sec BW=18MHz 50 fields/sec BW=18MHz 50 fields/sec BW=6MHz
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Color Picture/
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Unformatted text preview: Frame Half Picture/ Odd Field Half Picture/ Even Field R G B R G B Y U V Y U V 25 frames/sec BW=36 MHz 50 fields/sec BW=18MHz 50 fields/sec BW=18MHz 50 fields/sec BW=10MHz Y 6MHz 2MHz U 2MHz V Color Picture/ Frame Half Picture/ Odd Field Half Picture/ Even Field R G B R G B Y U V Y U V Frequency Interleaving Frequency Interleaving 25 frames/sec BW=36 MHz 50 fields/sec BW=18MHz 50 fields/sec BW=18MHz 50 fields/sec BW=10MHz Y 6MHz U+V Color Picture/ Frame Half Picture/ Odd Field Half Picture/ Even Field R G B R G B Y U V Y U V Frequency Interleaving Frequency Interleaving Composite Video Signal Composite Video Signal 25 frames/sec BW=36 MHz 50 fields/sec BW=18MHz 50 fields/sec BW=18MHz 50 fields/sec BW=10MHz 50 fields/sec BW=6MHz Tradeoff Poorer resolution for fast motion picture Distortion in color due to frequency interleaving Distortion in luminance at high frequency Very little rooms for further compression...
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This note was uploaded on 01/11/2011 for the course EE 4115 taught by Professor Waimingtsang during the Spring '10 term at City University of Hong Kong.

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tvsummary - Frame Half Picture/ Odd Field Half Picture/...

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