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HE-AAC is a perceptual coding method used to compress digital audio for
efficient storage and transmission.
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MPEG is an audio compression method that compresses audio to the
smaller size without any considerable loss of audio quality.
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Dolby Digital Plus and HE-AAC are the technologies for HD (High
definition) programmes.
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For DVB
SPDIF Selection
(Auto / PCM)
Selects the initial setting for digital audio output signal from DIGITAL AUDIO
and HDMI2 / HDMI4 (ARC function) terminals.
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SPDIF is a standard audio transfer file format.
Auto:
Dolby Digital Plus, Dolby Digital and HE-AAC multi-channel are output
as Dolby Digital Bitstream. MPEG is output as PCM. DTS is output as
DTS for video contents of Media Player / Network services.
PCM:
Digital output signal is fixed to PCM.
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ARC (Audio Return Channel) is a function of digital audio output using
HDMI cable.
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For DVB or video contents of Media Player / Network services
Media Player > Video mode > Audio output settings
Network > Videos > Audio output settings
SPDIF Delay
Adjusts the delay time of the sound output from DIGITAL AUDIO and HDMI2 /
HDMI4 (ARC function) terminals if the sound does not synchronise the image.
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For DVB