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Dolby Digital High Definition Audio Our discussion continues by taking a look at two of the latest Dolby Digital multi-channel audio formats - Dolby TrueHD and Dolby Digital Plus. Both Dolby TrueHD and Dolby Digital Plus fall under the category of high definition sound, or 'high resolution audio' as it is referred to under the DTS lineup. These Dolby sound formats offer greatly improved sound quality by increasing both the bit rate from a maximum of 640 Kilobits per second to several Megabits per second, and also by increasing the number of full-range audio channels.
This Dolby sound format has been developed for high-definition disc-based media such as HD DVD and Blu-ray Disc players, to deliver audio that matches the stunning high definition pictures created by these devices. Dolby® TrueHD has been selected as a mandatory format for HD DVD and as an optional format for Blu-ray Disc. It is also fully backward compatible with A/V receivers and HTIB (home-theaters-in-a-box) solutions supporting multi-channel Dolby Digital surround sound.
Dolby Digital Plus provide more than just a higher bit rate and increased number of full range audio channels; it also provides new coding efficiencies for future broadcasting and streaming of multi-channel audio. It is designed to complement all high-definition programming and media. Built on Dolby Digital, Dolby Digital Plus is fully compatible with all current A/V receivers.
Next: Dolby Surround Sound Expansion ...back to Dolby Sound Formats Sec. Index
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