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APPENDIX ➤ Glossary En 104
Sampling Frequency and Bit Depth
These are values that represent the amount of information used to convert analog signals to digital signals.
They may be expressed as 48kHz/24bit, for example.
• Sampling Frequency
This defines the number of samples per second (sampling a finite set of discrete values in an analog
signal). The higher the sampling rate, the broader the range of frequencies that can be played back.
• Bit Depth
This defines the amplitude value of sounds when quantifying analog signals as finite values. The higher
the bit depth, the deeper sounds are reproduced.
Deep Color
This is a video technology supported by the HDMI standard. It processes RGB or YCbCr signals at bit
depths of 10, 12, or 16 bits per color, whereas conventional formats utilize only 8-bit processing, enabling
reproduction of more colors. Its gamut is comprised of a billion or more colors, while the gamuts of
conventional formats are comprised of only millions of colors or less. This broader gamut results in more
precise reproduction of colors and greater detail in darker portions.
Dolby Atmos
Dolby Atmos is an object-based surround sound technology developed by Dolby Laboratories. Traditional
surround sound technologies record and control audio for each channel. Dolby Atmos records audio
content as a collection of many objects (a combination of audio information and information related to
movement of sound positions) and precisely controls content in accordance with various home theater
environments for an acoustic environment more realistic and three-dimensional than ever before. Another
advantage is the ability to record sounds coming from overhead. It was originally developed for movie
theaters, but can also be applied to home devices.
Dolby Atmos content is provided in the Dolby True HD format, including Dolby Atmos streams, or in the
Dolby Digital Plus format.
Dolby Digital
This is a compressed audio format for 5.1 channels. It was developed by Dolby Laboratories, and is widely
used with DVD discs.
Dolby Digital EX
This technology enables 6.1-channel playback for sources encoded in the Dolby Digital EX format. It takes
the Dolby Digital 5.1-channel setup one step further with an additional back surround channel.
Dolby Digital Plus
This is a compressed audio format for 7.1 channels developed by Dolby Laboratories. It is fully compatible
with Dolby Digital and is available for playback on Dolby Digital-enabled audio systems. It is widely used
with Blu-ray Discs.
Dolby Surround
This surround sound technology was developed by Dolby Laboratories to extend 2- to 7.1-channel content
in accordance with audio systems used for playback. It not only enables playback of Dolby Atmos content
but also extends traditional audio content to surround sound, including height channel audio, for 3D
surround sound playback.
Dolby TrueHD
This advanced lossless audio technology was developed by Dolby Laboratories for high-definition
disc-based media to deliver sounds that are identical, bit for bit, to studio masters for a great home theater
experience. It delivers up to 8 discrete channels of 24-bit/96-kHz (up to 6 discrete channels of 24-bit/192
kHz) audio simultaneously, and is widely used with Blu-ray Discs.
DTS Digital Surround
This is a compressed audio format for 5.1 channels developed by DTS. It is widely used with DVD discs.
DTS Express
This is a compressed audio format for 5.1 channels. It provides a higher compression ratio than the DTS
Digital Surround audio format, and was developed specifically for network streaming and Blu-ray Disc
secondary audio.
DTS-HD High Resolution Audio
This is a compressed audio format for 24-bit/96-kHz superior sound quality with 7.1 channels developed by
DTS. It is fully compatible with DTS Digital Surround, and is widely used with Blu-ray Discs.
DTS-HD Master Audio
This advanced lossless audio technology was developed by DTS for high-definition disc-based media to
deliver sounds identical, bit for bit, to studio masters for a great home theater experience. It delivers up to 8
discrete channels at 24-bit/96 kHz (up to 6 discrete channels at 24-bit/192 kHz) audio simultaneously, and is
widely used with Blu-ray Discs.
DTS Neo:6
This technology enables discrete 6-channel playback from 2-channel sources. There are two modes
available: “Music mode” for music sources and “Cinema mode” for movie sources. It provides a channel
split effect similar to sources recorded as discrete surround sound.
Glossary
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