Sony DAV-DS1000 User Manual

GB

Fig.1  Signal spectrum for digital infrared audio
transmission

L

R

2

3

4

5

6

[MHz]

Hi-fi audio transmission band (2 to 6 MHz)

Analog
transmission

Digital transmission (Digital
Infrared Audio Transmission )

This sound format for movie theatres is
more advanced than Dolby Surround Pro
Logic. In this format, the rear speakers
output stereo sound with an expanded
frequency range and a subwoofer channel
for deep bass is independently provided.
This format is also called “5.1” because the
subwoofer channel is counted as 0.1 channel
(since it functions only when a deep bass
effect is needed). All six channels in this
format are recorded separately to realize
superior channel separation. Furthermore,
since all the signals are processed digitally,
less signal degradation occurs.

Dolby Pro Logic II creates five full-
bandwidth output channels from two-
channel sources. This is done using an
advanced, high-purity matrix surround
decoder that extracts the spatial properties of
the original recording without adding any
new sounds or tonal colorations.

The Movie mode is for use with stereo
television shows and all programs encoded
in Dolby Surround. The result is enhanced
soundfield directionality that approaches the
quality of discrete 5.1-channel sound.

The Music mode is for use with any stereo
music recordings, and provides a wide and
deep sound space.

Section of a music piece on a data CD
containing MP3 audio tracks.

Sections of a picture or a music piece on a
DVD that are smaller than titles. A title is
composed of several chapters.

This is the generic name of the surround
sound produced by digital signal processing
technology developed by Sony. Unlike
previous surround sound fields mainly
directed at the reproduction of music,
Digital Cinema Sound is designed
specifically for the enjoyment of movies.

Recent times have been witness to the rapid
spread of DVDs, Digital Broadcasting
Satellite Receiver and other high-quality
media. In order to ensure that the subtle
nuances endowed by these high-quality
media would be transmitted with no
accompanying deterioration, Sony
developed a technology called “Digital
Infrared Audio Transmission” for the
infrared transmission of digital audio signals
using no compression, and it introduced it
into the DAV-DS1000.
This technology transfers digital audio
signals using no compression inside the
subcarrier frequency band allocated by the
IEC (International Electronic Committee)
and JEITA (Japan Electronics and
Information Technology Industries
Association) for hi-fi audio transmission
applications. Its transmission quality is on a
par with CDs or even better. (See Fig. 1)