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6 <title>Operations</title>
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13 <table style="width: 100%; text-align: left;" border="1" cellpadding="2"
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17 <td style="vertical-align: top;">
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18 <p>Connecting the computer to some other technological realm
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19 involves some kind of specialized interface. For audio, a "Sound Card"
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20 is used. For telephones, an "Analog Telephone Adapter (ATA)". For
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21 video, Analog and ATSC tuner cards are available.<br>
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24 <p>Note that these "Technology Transducers" provide much more
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25 than the simple "Signal transducer" role. Sound cards add mixing and
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26 switching features in addition to analog-to-digital and
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27 digital-to-analog conversion. Video cards often have digital
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28 compression and encoding features in addition to VHF/UHF radio
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29 receivers and analog-to-digital conversion.<br>
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32 <td style="vertical-align: top;"><img
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33 alt="Today's story: Operations systems" src="gallery_1_1_27635.jpg"
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34 style="width: 250px; height: 187px;"><br>
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40 <h3>sound cards</h3>
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41 <p>A/D, D/A, full-duplex, mixers, digitizer input selection, I/O<br>
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43 <h3>telephone cards<br>
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45 <p>zapata interface, TDM trunking, ATA, SIP, IAX, PBX<br>
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47 <h3>video cards</h3>
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48 <p>analog TV, MPEG encoding, DTV, Set-top computing<br>
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50 <h3>software radio</h3>
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51 <p>sound card redux, USB A/D D/A high speed conversion, RF block
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55 href="amradio-project.html">OVERVIEW</a>
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