En 135
DTS-HD Master Audio
DTS-HD Master Audio is an advanced lossless audio format developed to offer a high-definition home
theater experience with the quality of the studio master by DTS, Inc. DTS-HD Master Audio can carry up to
eight channels of 96 kHz/24-bit audio (up to six channels of 192 kHz/24-bit audio) simultaneously. This
technology is used for audio on BD (Blu-ray discs).
DTS Neo:6
DTS Neo:6 enables 6-channel playback from 2-channel sources. There are two modes available: “Music
mode” for music sources and “Cinema mode” for movie sources. This technology provides discrete
full-bandwidth matrix channels of surround sound.
FLAC
FLAC is a file format for lossless audio data compression. FLAC is inferior to lossy compressed audio
formats in compression rate but provides higher audio quality.
MP3
One of the compressed digital audio format used by MPEG. With psychoacoustic technologies, this
compression method achieves a high compression rate. Reportedly, it is capable of compressing data
quantity by about 1/10 maintaining a certain level of audio quality.
MPEG-4 AAC
An MPEG-4 audio standard. It is used for mobile telephones, portable audio players, and audio streaming
services on Internet because it allows a high compression rate of data while maintaining better audio quality
than MP3.
PCM (Pulse Code Modulation)
PCM is a signal format under which an analog audio signal is digitized, recorded, and transmitted. This
technology is the basis of all other audio format. This technology is used as a lossless audio format called
Linear PCM for audio on a variety of media, including CDs and BD (Blu-ray discs).
Sampling frequency/Quantization bit
Sampling frequency and quantization bits indicate the quantity of information when an analog audio signal
is digitized. These values are noted as in the following example: “48 kHz/24-bit”.
• Sampling frequency
Sampling frequency (the number of times the signal is sampled per second) is called the sampling rate.
When the sampling frequency is higher, the range of frequencies that can be played back are wider.
• Quantization bit
The number of quantization bits indicate the degree of accuracy when converting the sound level into a
numeric value. When the number of quantized bits is higher, the expression of the sound level is more
accurate.
WAV
Windows standard audio file format, which defines the method of recording the digital data obtained by
converting audio signals. By default, the PCM method (no compression) is used, but you can also use other
compression methods.
WMA (Windows Media Audio)
One of the compressed digital audio formats developed by Microsoft Corporation. With psychoacoustic
technologies, this compression method achieves a high compression rate. Reportedly, it is capable of
compressing data quantity by about 1/20 maintaining a certain level of audio quality.
■ Others
Bi-amplification connection (Bi-amp)
A bi-amplification connection uses two amplifiers for a speaker. When you use the bi-amplification
connection, the unit drives the tweeter and woofer in a speaker with the discrete amplifiers. As a
consequence, the tweeter and woofer provide clear audio signal without the interference.
LFE (Low Frequency Effects) 0.1 channel
This channel reproduces low-frequency bass signals and has a frequency range from 20 Hz to 120 Hz. This
channel is added to the channels for all bands with Dolby Digital or DTS to enhance low frequency audio
effects. This channel is labeled 0.1 because it is limited to only low frequency audio.
Lip sync
Video output sometimes lags behind audio output due to the complexity of signal processing caused by an
increase in video signal capacity. Lip sync is a technique for automatically correcting the timing lag
between audio and video output.
