Digital Theater Systems High Definition
Digital Theater Systems High Definition ( DTS-HD for short ) is a further development of the DTS - multi-channel sound system , which was especially designed for use with HDTV , Blu-rays and HD DVDs . It consists of the lossless DTS-HD Master Audio and the lossy DTS-HD High Resolution Audio which can be used alternatively depending on the requirements.
DTS-HD Master Audio
DTS-HD Master Audio allows a bit-identical reconstruction of the studio master thanks to the high sampling rate and resolution as well as the lossless compression. With previous Blu-ray Discs, DTS-HD Master Audio has by far the largest distribution of all supported audio formats. A comparable competitive format is Dolby TrueHD .
specification
- Data rate: Variable data rate up to 24.5 Mbit / s on Blu-Ray Disc and 18 Mbit / s on HD-DVD
- Channels: up to 7.1 at 96 kHz / 24 bit or 2.0 at 192 kHz / 24 bit
- Sampling rate: up to 192 kHz
- Resolution: up to 24 bits
DTS-HD high resolution audio
DTS-HD High Resolution Audio compresses lossy and is therefore ideal in cases in which the use of DTS-HD Master Audio is not possible or useful for reasons of capacity. A comparable competitive format is Dolby Digital Plus .
specification
- Data rate: constant data rate between 1.5 Mbps and 6.0 Mbps for Blu-Ray Disc and 1.5 Mbps to 3 Mbps for HD-DVD
- Channels: up to 7.1
- Sampling rate: up to 96 kHz
output
After decoding, DTS-HD sound can be output in analogue via all common outputs. One cable is then required for each channel. Digitally, DTS-HD can only be transmitted unchanged via HDMI . For transmission as a bitstream , on the one hand a playback device is required which can output the DTS-HD Master as a bitstream, and on the other hand an AV receiver whose decoder can decode this audio format. Both devices must have an HDMI 1.3a interface. The transmission of DTS-HD sound via the audio return channel is not possible.
Alternatively, DTS-HD can also be decoded in the playback device and then transmitted to the AV receiver as a multichannel PCM . According to the specifications, this is already possible with HDMI 1.1 and 1.2, but not every AV receiver with HDMI input supports the processing of multi-channel PCM signals. Since it is technically irrelevant whether the decoding takes place in the playback device or in the AV receiver, the use of DTS-HD Master is also possible without bitstream transmission.
The PlayStation 3 from Sony since the supports firmware version 2.30, the internal decoding of DTS-HD Master and output via HDMI as uncompressed multi-channel PCM signal. This enables AV receivers that do not have a decoder for DTS-HD Master, but which can receive up to 8-channel multichannel PCM signals, to play DTS-HD Master without restrictions.
Via optical or coaxial S / PDIF connection, the DTS Core, i.e. H. a normal DTS track like on DVDs, output at ~ 1.5 Mbps.
FFmpeg contains a DTS-HD decoder.
Individual evidence
- ↑ DTS-HD Audio Consumer White Paper for Blu-ray Disc and HD DVD Applications p. 6
- ↑ DTS-HD Audio Consumer White Paper for Blu-ray Disc and HD DVD Applications p. 6
- ↑ DTS-HD Audio Consumer White Paper for Blu-ray Disc and HD DVD Applications p. 7
- ↑ DTS-HD Audio Consumer White Paper for Blu-ray Disc and HD DVD Applications p. 8