MPEG (Moving Picture Experts Group), MPEG-2, MPEG-4
These are the names for digital compression format standards used for
the encoding of video and audio. Video standards include “MPEG-1
Video”, “MPEG-2 Video”, “MPEG-4 Visual”, “MPEG-4 AVC”. Audio
standards include “MPEG-1 Audio”, “MPEG-2 Audio”, “MPEG-4 AAC”.
WMA (Windows Media Audio)
This is audio compression technology developed by Microsoft
Corporation.
WMA data can be encoded using Windows Media
®
Player.
To encode WMA files, only use applications authorized by Microsoft
Corporation. If you use an unauthorized application, the file may not work
properly.
Sampling frequency
Sampling involves taking a reading of a sound wave (analog signal) at
regular intervals and expressing the height of the wave at each reading in
digitized format (producing a digital signal).
The number of readings taken in one second is called the “sampling
frequency”. The larger the value, the closer the reproduced sound is to the
original.
Speaker impedance
This is an AC resistance value, indicated in Ω (ohms).
Greater power can be obtained when this value is smaller.
Dialogue normalization function
This function operates automatically during playback of Dolby Digital,
Dolby Digital Plus, Dolby TrueHD, DTS or DTS-HD sources.
It automatically corrects the standard signal level for individual program
sources.
Dynamic range
The difference between the maximum undistorted sound level and the
minimum discernible level above the noise emitted by the device.
Downmix
This function converts the number of channels of surround audio to a
lower number of channels and plays back according to the system’s
configuration.
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