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DTS Digital Surround: 5.1 max channel sound at 1.5 megabits per second.

Dolby TrueHD: 7.1 max channel sound at 18 megabits per second (“lossless” quality available on Blu-ray discs).

Dolby Digital Plus: 7.1 max channel sound at 1.7 megabits per second (supported by some services like Netflix).

Dolby Digital: 5.1 max channel sound at 640 kilobits per second (this is common on DVDs).

But we can look at some of the specific specs available and make a rough determination. How They’re Differentĭolby Surround and DTS are proprietary formats, so a complete examination of the technology they use isn’t really possible (unless you happen to work for either company).

Some forms of DTS and Dolby Digital are “lossy”, meaning it has a degree of audio degradation from the original source, while others get around this audio loss for “lossless” studio levels of performance while still offering some compression for space savings (see below).

It may not be compatible with the highest bitrate Dolby and DTS standards.īoth formats use compression to save space (either on the disc, in the case of DVD and Blu-ray, or streaming bandwidth, in the case of services like Netflix). But for the purposes of a standard Blu-ray or satellite system with a high-end audio receiver, we’re going to focus on the surround sound playback.Ī relatively inexpensive 5.1-speaker setup with an integrated Blu-ray player. In addition to 5.1 and 7.1 speaker playback in various formats, both standards have multiple extra technologies, like specific encoders for enhanced stereo, the older Pro Logic standards that simulate surround sound, converting up or down to match a non-standard number of speakers, enhanced surround for extra immersion, and so on. For the most common applications, playback of movies and TV shows via DVD, Blu-ray, and cable or satellite TV systems, both standards are used by the studio to compress the dense files necessary for multi-channel audio and decompress it by your receiver for playback.

The two big ones supported by most high-end home audio systems are Dolby Digital and DTS (short for the owner of the standard, originally named Digital Theater Systems). But what’s the difference between the two? What Are Dolby Digital and DTS?īoth Dolby and DTS offer surround sound codecs for 5.1, 6.1 (rare), and 7.1 setups, where the first number indicates the number of small surround speakers and the “.1” is a separate channel for a subwoofer. Just like music, surround sound platforms are available in multiple standards.