their original form. Analog signals are transmitted in waves; digital signals are transmitted as on and off bits. Before they are transmitted over digital landlines or wireless networks, codecs compress (encode) analog signals and convert them to digital bits. Codecs sample speech at different amplitudes along the sound wave and convert it to a one or a zero. At the receiving end, decoders convert the ones and zeros back to analog sound or video waves. www.TechnicalPDF.com Codecs are located in cellular handsets, telephones, high-definition TV transmitters, set-top boxes, televisions, IP telephones, and radios. Codecs also compress voice in speech recognition and voicemail systems. With compression, codecs do not have to sample every height on the sound wave to achieve high- quality sound. They might skip silence or predict the next sound, based on the previous sound. Thus, fewer bits per second are transmitted to represent the speech. Virtual Reality-Immersive Experiences Virtual reality (VR) is the use of specialized software and hardware to produce video that creates an immersive experience for people that play video games, and watch videos, sporting events, and movies. The goal of virtual reality is to create the illusion that people watching movies and sporting events are actually at the event rather than watching from a remote location. They are virtually experiencing it. For example, the experience of watching someone climb a mountain via VR can give the viewer a sense of the peril and freezing temperature experienced by the climber. As a result of this immersive experience, virtual reality movies that depict assaults on people or scenes of destruction caused by war or natural disasters may create empathy for people viewing these videos. Virtual reality (VR) is a technique for capturing immersive images and videos. For example, people can see the cruise ship or resort in VR to help select a vacation venue. Images captured in virtual reality formats have far greater detail than available on traditional phot