Yamaha HTR-5630RDS Manuel du propriétaire télécharger pdf (Page 55)

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101

English

ADDITIONAL

INFORMATION

■ PCM (Linear PCM)

Linear PCM is a signal format under which an analog

audio signal is digitized, recorded and transmitted without

using any compression. This is used as a method of

recording CDs and DVD audio. The PCM system uses a

technique for sampling the size of the analog signal per

very small unit of time. Standing for “pulse code

modulation”, the analog signal is encoded as pulses and

then modulated for recording.

■ Sampling frequency and number of

quantized bits

When digitizing an analog audio signal, the number of

times the signal is sampled per second is called the

sampling frequency, while the degree of fineness when

converting the sound level into a numeric value is called

the number of quantized bits.

The range of rates that can be played back is determined

based on the sampling rate, while the dynamic range

representing the sound level difference is determined by

the number of quantized bits. In principle, the higher the

sampling frequency, the wider the range of frequencies

that can be played back, and the higher the number of

quantized bits, the more finely the sound level can be

reproduced.

GLOSSARY

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Yamaha HTR-5630RDS Manuel du propriétaire Page 55

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