5.1

In audiophonie, the 5.1 indicates a phonic system of reproduction to six channels. Each channel is materialized by a pregnant specific. Figure 5 of 5.1 corresponds to the 5 enclosures which are often indicated by the " term; satellite" and which is generally of small size. Only the basic box, which corresponds to figure 1 of 5.1, can have an important size; it is called also Subwoofer.

Channels

a front central channel, noted C. It is mainly intended for the dialogs in the case of a audio-visual production.
Two front side channels, noted L and R (of English Left and Right );
Two channels side postpones, noted Ls and Rs ( Left surround and Right surround );
a channel Subwoofer (Infrason S), noted LFE ( Low Frequency Effects ).

Installation

During the Years 1990, UIT proposes a standard of dispostion of the loudspeakers (for a use with or without associated image) in its recommendation ITU-R BS.775-1. Seen tops, the five loudspeakers are laid out on an imaginary circle whose listener is the center, that in order to guarantee a balance between the five points of diffusion. The loudspeakers “left” and “right-hand side” are located on both sides loudspeaker “centers” with an angle of 30°, the loudspeakers “surround left” and “surround right” with a variable angle between 100° and 120° compared to the “center”. The place of the “subwoofer” does not have importance, the human ear not perceiving the direction of the low frequencies; it must nevertheless be posed with same the ground.

Systems of reproduction 5.1

SDR
Dolby DIGITAL 5.1, Prologic II
SDDS

Random links: