Philips MCI500H/05 User Manual download pdf (Page 37)

35

B

Bass

The lowest three octaves of the audio band.

Low bass is the bottom octave (20-40Hz),

mid-bass is the middle octave (40-80Hz), and

upper bass is the 80-160Hz octave.

Bit / bits

A bit is a binary digit, taking a value of either

0 or 1. For example, the number 10010111 is

8 bits long.

Bit rate

Bit rate is the number of bits that are

conveyed or processed per unit of time. The

bit rate is usually measured in some multiple

of bits per second (kilobits per second: kbps).

The term bit rate is a synonym for data

transfer rate (or simply data rate).

C

CBR (constant bit rate)

With CBR the encoder spends the same

amount of bits on each frame, regardless of

how much it may really need. Disadvantage

of CBR: Bits are wasted in case of absolute

blackness of a picture or complete silence in

an audio frame. And pictures or audio frames

with a lot of elements may need those bits.

CD (Compact Disc)

Format developed by Phillips, Sony, and

Pioneer for conveying music and data. CDs

record information by deforming the inner

metal foil on the disc with tiny micro pits

burned in by a laser.

CDDB

A centralized database of CDs, CD tracks, and

artists on the Web, now known as Gracenote.

The audio player or burner program can log

on to CDDB. It uploads the ID of the CD

being played, and then downloads the title,

artist, and track list.

15 Glossary

A

AAC (Advanced Audio Coding)

An audio compression scheme dened as

part of the MPEG-2 standard (also known

as MPEG-2 AAC or MPEG-2 NBC, or Not

Backwards Compatible). It offers better sound

and a compression ratio that is superior by

roughly 30 percent compared to the MPEG-1

MP3 format.

AC (alternating current)

An alternating current is an electrical current

whose magnitude and direction vary cyclically,

as opposed to DC (direct current), whose

direction remains constant. The usual

waveform of an AC power circuit is a sine

wave, as this results in the most efcient

transmission of energy. However certain

applications use different waveforms, such as

triangular or square waves.

Amplier

A device, either a single stage or a large scale

circuit with multiple stages for creating gain,

i.e. it makes small signals larger.

Antenna

A device, such as a rod or wire, which picks up

a received radio frequency signal or radiates a

transmitted RF signal.

Audio output

High-level (speaker) or line-level (RCA) signals

sent from one system component to another;

or the high-level signal from an amplier to

the system speakers.

AUX

Auxiliary input that allows you to connect

portable audio devices.

English

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