Download A Technical Introduction to Digital Video by Charles A. Poynton PDF

By Charles A. Poynton

Now not a programming or a recipe e-book, this can be a entire reference that offers the basic suggestions and strategies improvement of electronic video tasks. This e-book is designed for technical humans no longer already video specialists who have to layout, construct and program--hardware and software--systems that come with video.

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The plot shows an S-shaped curve that compresses blacks, compresses whites, and has a CHAPTER 6 GAMMA 97 reasonably linear segment in the central portion of the curve. The ubiquitous use of D-log E curves in film work – and the importance of the linear segment of the curve in determining correct exposure – leads many people to the incorrect conclusion that film has an inherently logarithmic luminance response in terms of physical quantities! But a linear slope on a log-log plot is characteristic of a power function, not a logarithmic function: In terms of physical quantities, transmittance of a typical film is a power function of exposure.

The rate at which the signal in the channel can change state – the symbol rate or baud rate – is constant at 2400 baud, but this modulation method has a data rate or bit rate of 9600 b/s. A TECHNICAL INTRODUCTION TO DIGITAL VIDEO Resolution As picture detail increases in frequency, the response of an imaging system will eventually deteriorate. In image science and in television, resolution refers to the capability of an imaging system to reproduce fine detail in the picture. The absolute upper limit to resolution in a digital image system is the number of pixels over the width and height of a frame, and is the way the term resolution is used in computing.

The standard interface for 4:2:2 component digital video is Rec. ITU-R 601-4. 75 MHz. 375 MHz – that is, the color difference signals are horizontally subsampled by a factor of 2:1 with respect to luma. 94 systems (858 S/TL) and 625/50 systems (864 S/TL). 94 and 625/50. 94 and 625/50 systems, and have been standardized with the designation D-1. That designation properly applies to the tape format, not the signal interface. Transport, electrical, and mechanical aspects of 4:2:2 interface are specified in Rec.

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