Noise in Multimedia System Essay Example | Topics and Well Written Essays - 3750 words

kerfuffle in Multimedia System - Essay Example incumbrance is defined as any unclaimed thing in the desired one. Though in some special cases in electronics like oscillator where sound is intentionally introduced but, most of the times they create hindrance to the actual motto. Suppose after faithful encode data is sent over transmission system fair. Spurious electrical signals from environment whitethorn interfere to the master signal resulting illegitimate enterprise. In other(a) cases noise appears as flicker of screen. For portable devices developers need to design layout for the cross device and developing pixels of precise width and resolution sometimes give erroneous result. Again, on disputation content developers who puddle independently for target devices finally come out with object glasss which have problem in mapping. This paper explicitly concentrates on various noise sources and their effect on multimedia products. It also outlines ways to overcome it.Noise in one sense is defined as measurable amount of going away of data. It is a hit-or-miss parameter that can be measured by its statistical properties. In telecommunication line of business noise is generally gets added in medium during transmission. radiation diagram 1 shows such a transmission channel.In in the midst of transmitter to receiver there is the medium. It can be either wire in case of line communication or free space for wireless communication. Signal gets interfered by noise in the medium by various means e.g. thundering, signal from other sources if twain signals are close to each other and from mismatch between transmitter and receiver. Shannon defined the limit of transmission in a noisy channel for a given channel capacity in order to maximize the signal-to-noise (SNR) ratio1. But it does not guarantee noise free transmission. This is nothing but the post transmission noise and before it gets received. polar methods exist to detect any error has arisen and if so, to correct it. The seven layer OSI model works thoroughly for error detection and correction in any computer communication process. From multimedia perspective transmission and reception methods are somewhat more complex where total display is fragmented into different components and therefore all together in orderion is sent to the target end maintaining timing constraint. SMIL is a language format used for convert multimedia presentations for transmission over the web. Its a structured composition of autonomous media objects. Figure 2 shows one basic timing containers2. In SMIL seq container gravel time is relative to predecessors end. Par container has begin time relative to the containing par but for excl object a is started whenever object x (not shown) is activated and object b, c are started when object y and z (not shown) are activated. It is to be noted that no two common timeline should be used to model the relationship between a, b and c. If its not maintained t herefore there will be overlap between the objects that will turn to give timing mismatch, which may appear as noise in display. Other than this, before transmission objects are encoded into convenient form. During encoding data might get lost. For example if its an image then it might have been encoded into jpg form where loss of data and as a result noise can get introduced. This noise will be incorporated throughout its processing and appear finally in