The HD encoder takes the Core Stream, compares it with the uncompressed input, and produces a ‘difference’ signal made up of the information that was thrown away by the lossy compression. This uses a stream of up to 18Mbps for the HD DVD format or up to 24.4Mbps on the Blu–ray format.Ĭleverly, the extra layers, or extensions as DTS call them, do not duplicate any information in the Core Stream. no audio data is thrown away!) to play back up to 7.1 channels with sample rates up to 96kHz, or up to 5.1 channels with sample rates up to 192kHz. The second HD extension is DTS–HD Master Audio. The first is DTS–HD High Resolution Audio, which offers up to 7.1 surround, with sample rates up to 96kHz and an improved data rate of up to 3.018Mbps on the HD DVD format and up to 5.769Mbps on the Blu–ray format. The introduction of high–definition DVD formats such as Blu–ray and DVD–HD means there is space for even higher–quality audio options, and so DTS have added two further extension options to their format. These are DTS–ES, which offers 6.1 by adding a centre surround channel, and DTS 96/24k, which is still 5.1 but with a maximum sample rate of 96kHz. However, DTS have also designed extensions to deliver extra levels of quality.
The basic Core Stream can support (compressed) data rates of up to 1.509Mbps with a sample rate of up to 48kHz. Like AC3, the DTS format is data–compressed, but it has the potential to offer much higher sound quality. However, if disc space is available, there is also the option to add a second stream in a format called DTS. The DVD–Video format requires that audio be supplied as either an AC3 Dolby Digital stream or a PCM stereo audio stream. If you want to create a surround soundtrack for your DVD while avoiding the limitations of Dolby AC3 audio, DTS’s clever High Resolution format has a lot to offer.
0 kommentar(er)
