On an audio compact disc (CD), digital bits of information
Chapter 2, Problem 83(choose chapter or problem)
On an audio compact disc (CD), digital bits of information are encoded sequentially along a spiral path. Each bit occupies about A CD players readout laser scans along the spirals sequence of bits at a constant speed of about as the CD spins. (a) Determine the number N of digital bits that a CD player reads every second. (b) The audio information is sent to each of the two loudspeakers 44,100 times per second. Each of these samplings requires 16 bits, and so you might expect the required bit rate for a CD player to be where the 2 is for the 2 loudspeakers (the 2 stereo channels). Note that is less than the number N of bits actually read per second by a CD player. The excess number of bits is needed for encoding and errorcorrection. What percentage of the bits on a CD are dedicated to encoding and error-correction?
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