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| tituscomputer.com | Methods of stereo recording | Binaural recording | Stereo Recordings | Sound recording | Broadcasting in stereo | History | Common usage |
Broadcasting in stereo
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Radio FM In FM broadcasting, the Zenith-GE pilot-tone stereo system is used throughout the world. AM Because of the limited audio quality of AM, relatively few stations bother with stereo. Various modulation schemes are used for AM stereo, of which the best-known is Motorola's C-QUAM. DAB MP2 audio streams are used. Television Analog TV (PAL and NTSC) Various modulation schemes are used in different parts of the world to broadcast more than one sound channel. These are sometimes used to provide two mono sound channels in different languages rather than stereo. |
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Multichannel television sound is used mainly in the Americas. NICAM is widely used in Europe. Zweiton is used in Germany. EIAJ FM/FM sub carrier system is used in Japan. Digital TV MP2 audio streams are widely used within MPEG-2 program streams. FM radio is a broadcast technology invented by Edwin Howard Armstrong that uses frequency modulation to provide high-fidelity sound over broadcast radio. The original FM broadcast band in the USA in the early-1940s was on 42-50 MHz with 0.2 MHz channel spacing. This band was abandoned after World War II and is now allocated to a seldom-used two-way communications service. Throughout the world, 87.5-108 MHz (or some portion thereof) is used as a broadcast band, with one very notable exception: Japan, which uses its own unique 76-90 MHz band with 0.1 MHz channel spacing. The frequency of an FM broadcast station (more strictly its assigned nominal center frequency) is usually an exact multiple of 100 kHz. In the Americas and Caribbean only odd multiples are used. In Italy, multiples of 50 kHz are used. The bandwidth of an FM transmission is normally somewhat wider than these figures, and depends on whether stereo is used and the manner in which the peak deviation is regulated. In the UK, for example, broadcast licenses specify that the nominal bandwidth of the transmission is 270 kHz. In many countries the minimum spacing for stations intended to serve overlapping areas is 400 kHz. In the former Soviet republics, and some Eastern Bloc nations, an additional older band from 65.9 to 74 MHz is also used. Assigned frequencies are multiples of 30 kHz. This older band, sometimes referred to as the OIRT band is slowly being phased out in many countries |
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| tituscomputer.com | Methods of stereo recording | Binaural recording | Stereo Recordings | Sound recording | Broadcasting in stereo | History | Common usage |