Pioneer S-HTD330 manual Additional information Glossary, Analog audio, Aspect ratio, Digital audio

Additional information

Glossary

Analog audio

An electrical signal that directly represents sound. Compare this to digital audio which can be an electrical signal, but is an indirect representation of sound. See also Digital audio.

Aspect ratio

The width of a TV screen relative to its height. Conventional TVs are 4:3 (in other words, the screen is almost square); widescreen models are 16:9 (the screen is almost twice as wide as it is high).

Digital audio

An indirect representation of sound by numbers. During recording, the sound is measured at discrete intervals (44,100 times a second for CD audio) by an analog-to-digital converter, generating a stream of numbers. On playback, a digital-to-analog converter generates an analog signal based on these numbers. See also Sampling frequency and Analog audio.

Dolby Digital / Pro Logic II

Dolby Digital uses up to 5.1 discrete channels of audio for surround sound. The front, center and surround channels are full range, while a Low Frequency Effects channel delivers bass sounds often used for sound effects (hence 5.1 channels).

Dolby Pro Logic II is a matrix decoding system that extracts 4.1 (Dolby Pro Logic) or 5.1 (Dolby Pro Logic II) channel surround sound from a two channel source.

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DRM

DRM (Digital Rights Management) is a type of server software developed to enable secure distribution of paid content over the Web, recently incorporated by WMA (Windows Media Audio).

DTS

DTS stands for Digital Theater System. DTS is a surround system different from Dolby Digital that has become a popular surround sound format for movies.

Dynamic range

The difference between the quietest and loudest sounds possible in an audio signal (without distorting or getting lost in noise). Dolby Digital and DTS soundtracks are capable of a very wide dynamic range, delivering dramatic cinema-like effects.

EXIF (Exchangeable Image File)

A file format developed by Fuji Photo Film for digital still cameras. Digital cameras from various manufacturers use this compressed file format which carries date, time and thumbnail information, as well as the picture data.

File extension

A tag added to the end of a filename to indicate the type of file. For example, “.mp3” indicates an MP3 file.

ISO 9660

International standard for the volume and file structure of CD-ROM discs.

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