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The feedback capacity is known as a closed-form expression only for several examples such as the trapdoor channel, [14] Ising channel, [15] [16]. For some other channels, it is characterized through constant-size optimization problems such as the binary erasure channel with a no-consecutive-ones input constraint, [ 17 ] NOST channel.
The choice of the right channel affects successful communication. For example, a classroom teacher has to decide which contents to present orally, by talking about them, and which ones to present visually through books. The choice also depends on the receiver whose decoding skills may be better for some channels than for others. [51] [60]
Examples of shared physical media are wireless networks, bus networks, ring networks and point-to-point links operating in half-duplex mode. A channel access method is based on multiplexing, which allows several data streams or signals to share the same communication channel or transmission medium.
Channel expansion theory (CET) states that individual experience serves as an important role in determining the level of richness perception and development towards certain media tools. It is a theory of communication media perception that incorporates experiential factors to explain and predict user perceptions of a given media channel. The ...
The nature of media dependence on societal systems varies across political, economic, and cultural system. The relationship between the media and the audience: This relationship is the key variable in this theory because it affects how people might use a mass medium. This relationship also varies across media systems.
For example, in wireless communications the channel is often modeled by a random attenuation (known as fading) of the transmitted signal, followed by additive noise. The attenuation term is a simplification of the underlying physical processes and captures the change in signal power over the course of the transmission.
PEC (Political Economy of Communications) analyzes the power relations between the mass media system, information and communications technologies (ICTs) and the wider socioeconomic structure in which these operate, with a focus on understanding the historical and current state of technological developments.
Integrated communication unifies all mass communication elements, such as social media, public relations, and advertising. This ensures that the ways in which a company communicates follow the company's business goals and remain consistent across all media channels. This brings value to brand loyalty and to maintaining brand identity. [13]