By R. T. Compton
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Additional info for Adaptive antennas : concepts and performance
Analog vs. Digital Until a few years ago, most video equipment was designed primarily for analog video. Digital video was confined to professional applications, such as video editing. 6 The average consumer now uses digital video every day thanks to continuing falling costs. This trend has led to the development of DVD players and recorders, digital set-top boxes, digital television (DTV), portable video players and the ability to use the Internet for transferring video data. Video Data Initially, video contained only gray-scale (also called black-and-white) information.
001) for compatibility with (M) NTSC timing. 1. 1. 480i Vertical Interval Timing. 2. 480p Vertical Interval Timing. 556 µs. Detailed horizontal timing is dependent on the specific video interface used, as discussed in Chapter 5. Progressive Analog Component Video Analog component signals are comprised of three signals, analog R´G´B´ or YPbPr. 001) for easier compatibility with (M) NTSC timing. 2. 776 µs. Detailed horizontal timing is dependent on the specific video interface used, as discussed in Chapter 5.
The term invalid refers to RGB components outside the normalized RGB limits of (1, 1, 1). 14. CIE 1931 Chromaticity Diagram Showing Various Color Regions. 15. CIE 1931 Chromaticity Diagram Showing Various Color Gamuts. 16. RGB Limits Transformed into 3-D YCbCr Space. For example, given that RGB has a normalized value of (1, 1, 1), the resulting YCbCr value is (235, 128, 128). 56)—note that the green value exceeds the normalized value of 1. From this illustration it is obvious that there are many combinations of Y, Cb, and Cr that result in invalid RGB values; these YCbCr values must be processed so as to generate valid RGB values.