The receiver in information theory is the receiving end of a communication channel. It receives decoded messages/information from the sender, who first encoded them. Sometimes the receiver is modeled so as to include the decoder. Real-world receivers like radio receivers or telephones can not be expected to receive as much information as predicted by the noisy channel coding theorem. Real-world receivers include:
For modulated radio waves, a radio receiver For converting specifically AM modulated radio waves to sound, an AM Tuner For converting specifically FM modulated radio waves to sound, an FM Tuner For converting specifically television transmissions to video and audio, a television tuner, which may be a component of an AV receiver For modulated ultrasound waves, a receiver (modulated ultrasound) For converting analog electrical signals on a wire to audio, a speaker system, which may be a component of an audio headset or telephone handset. For reading magnetic patterns on tape, a tape head For reading magnetic patterns on a disk platter, the read head located on the disk read-and-write head For reading printed barcodes, a barcode reader.
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