Download e-book for iPad: A Technical Introduction to Digital Video by Charles A. Poynton

By Charles A. Poynton

ISBN-10: 047112253X

ISBN-13: 9780471122531

No longer a programming or a recipe ebook, this can be a whole reference that offers the elemental thoughts and strategies improvement of electronic video initiatives. This booklet is designed for technical humans now not already video specialists who have to layout, construct and program--hardware and software--systems that come with video.

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If pixels are viewed at a sufficient distance, these artifacts are of little importance. However, imaging systems are forced by economic pressures to make maximum perceptual use of the delivered pixels, consequently we tend to view CRTs at close viewing distances. Luma As you will see in Luma and color differences, on page 155, a video system conveys image data in the form of a component that represents brightness, and two other components that represent color. It is important to convey the brightness component in such a way that noise (or quantization) introduced in transmission, processing, and storage has a perceptually similar effect across the entire tone scale from black to white.

Consumer video generally refers to horizontal resolution, measured as the number of black and white elements (TV lines) that can be discerned over a horizontal distance equal to the picture height. Bandwidth and data rate Data rate does not apply directly to an analog system, and the term bandwidth does not properly apply to a digital system. 45 – of the sampling rate. 12 Bandwidth and data rate. 20 When arbitrary digital information is conveyed through an analog channel, as by a modem, the data rate that can be achieved depends on bandwidth, noise, and other properties of the channel.

The SI prefix k denotes 103 (1000); it is often used in data communications. The K prefix used in computing denotes 210 (1024). The SI prefix M denotes 106 (1 000 000). Disk storage is generally allocated in units integrally related to 1024 bytes; the prefix M applied to disk storage denotes 1 024 000. RAM memory generally has capacity based on powers of two; the prefix M applied to RAM denotes 220 or 1024 K (1 048 576). Data rate of digital video Line rate is an important parameter of a video system: Line rate is simply the frame rate multiplied by the number of lines per total frame.

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