On an audio compact disc (CD), digital bits of infor- mation are encoded sequentially along a spiral path. Each bit occupies about 0.28 µm. A CD player's readout laser scans along the spiral's sequence of bits at a constant speed of about 1.2 m/s 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 samplings (16 sampling, bits bits = 1.4 × 106 No = 2(44,100 where the 2 is for the 2 loudspeakers (the 2 stereo channels). Note that No is less than the number N of bits actually read per second by a CD player. The excess number of bits (= N - No) is needed for encoding and error- correction. What percentage of the bits on a CD are dedicated to encoding and error-correction?

On an audio compact disc (CD), digital bits of infor- mation are encoded sequentially along a spiral path. Each bit occupies about 0.28 µm. A CD player's readout laser scans along the spiral's sequence of bits at a constant speed of about 1.2 m/s 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 samplings (16 sampling, bits bits = 1.4 × 106 No = 2(44,100 where the 2 is for the 2 loudspeakers (the 2 stereo channels). Note that No is less than the number N of bits actually read per second by a CD player. The excess number of bits (= N - No) is needed for encoding and error- correction. What percentage of the bits on a CD are dedicated to encoding and error-correction?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

On an audio compact disc (CD), digital bits of infor-
mation are encoded sequentially along a spiral path. Each
bit occupies about 0.28 µm. A CD player's readout laser
scans along the spiral's sequence of bits at a constant
speed of about 1.2 m/s 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
samplings
(16 sampling,
bits
bits
= 1.4 × 106
No = 2(44,100
where the 2 is for the 2 loudspeakers (the 2 stereo channels).
Note that No is less than the number N of bits actually
read per second by a CD player. The excess number of
bits (= N - No) is needed for encoding and error-
correction. What percentage of the bits on a CD are
dedicated to encoding and error-correction?

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