Yamaha RX-V1800 Manuel du propriétaire télécharger pdf (Page 130)

128 En

Glossary

■ 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.

■ S-video signal

With the S-video signal system, the video signal normally

transmitted using a pin cable is separated and transmitted

as the Y signal for the luminance and the C signal for the

chrominance through the S-video cable. Using the

S VIDEO jack eliminates video signal transmission loss

and allows recording and playback of even more beautiful

images.

1 2 ... 125 126 127 128 129 130 131 132 133 134 135 ... 150 151

Pas de commentaire

Yamaha RX-V1800 Manuel du propriétaire Page 130