By Peter Hodges
What will we degree and why? Peter Hodges explains the reply to this query in approachable language and with transparent illustrations. rookies to the video undefined, in addition to these already tested, will locate this uniquely readable advisor to the fundamentals of a fancy topic. construction at the luck of the 2 prior variants of this well known identify and overlaying either analog and electronic video, the 3rd version contains new sections on audio dimension, excessive definition video, and cutting edge strategies of try out and size.
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Extra resources for An Introduction to Video and Audio Measurement
9 shows how it is done. 10 is the basic layout and all the principal controls are shown. The timebase is switchable between different time values, the main ones are line and field, often abbreviated to H and V. For instance, 1H is one line, 2 H is a display of two consecutive lines, but this does not quite explain what one is actually seeing. With the 1H mode, the timebase triggers the X deflection every line, resulting in a display of all lines superimposed. 6 Principle of the waveform monitor.
CHAPTER 5 ADDING COLOUR It is an established principle that any colour may be described in terms of red, green and blue (RGB). These are the colour primaries of additive colour; the distinction between adding coloured lights together and reflecting white light from coloured dyes is very important. 1). We must also establish a few other principles before a full understanding of colour can be gained, starting with the picture. Where the picture display screen produces no light, the result is black (assuming ideal viewing conditions with no reflected ambient light).
A) shows the waveform aligned horizontally to bring the sync leading edge to the centre and placed against a convenient time-scale point. ) When the other camera is selected as in (b), its timing is seen to be late by 2 ks. Although there is no picture information on the waveforms, the signals are ‘black and sync’, the test may be carried out just as easily in the presence of pictures. 56 Measuring video The 'scope is designed to be a versatile measurement and fault finding tool. Its input circuitry is designed for minimum effect on the systems and circuitry and the wide range of time and voltage scales available make it versatile.
An Introduction to Video and Audio Measurement by Peter Hodges