Consumer Technology Formats: CD

Question 1

First released as a commercial format in the early 80s. Data stored on a CD’s digital information read by a laser. Writable CD drives use a laser to transfer information to a ?-?, whereas commercial CDs use a moulding process to stamp the digital signal onto the ? of the CD.

Answer 1

CD-R.

Surface.

Question 2

Digital information’s sampled and converted from the analogue signal into ? data then written onto the CD. Consumer players convert this digital ? into an analogue signal that’s sent to an amp or speaker.

Answer 2

Binary.

Information.

Question 3

Advantage was the quality of the sound. Because CDs were digital, and the digital-to-analogue conversation ? was high, the quality was perceived as better.

Answer 3

Rate.

Question 4

CDs store data at ?/? Nyquist’s theorem states the sample rate of a digital system should be twice the highest ? captured.

Answer 4

16 bit/44.1kHz.

Frequency.

Question 5

CDs are fragile and can easily scratch, leaving vast sections of data ?

Answer 5

Unplayable.

Question 6

Given that CDs contain ? audio and streaming audio and MP3 files are compressed, there’ll be better quality in the future.

Answer 6

Uncompressed.