What is Dolby and DTS?
Dolby and DTS are competing audio technology companies that specialize in multichannel digital surround sound encoding and decoding. Their technologies compress high-quality multichannel audio data for efficient storage and transmission, then decode it to recreate a cinema-like theater sound experience on consumer devices such as home theater soundbars, PCs, and the best Audio Accessories for immersive entertainment.
Key Takeaways
Dolby and DTS are audio formats, not hardware speakers or brands.
Dolby Digital uses higher compression while DTS traditionally uses higher bitrates for theoretically cleaner sound.
Both brands now feature object-based audio formats: Dolby Atmos and DTS :X, which place sound in a 3D space.
Hardware compatibility requires a decoder or receiver capable of processing the specific codec.
History and Evolution
Dolby Laboratories introduced surround sound to cinemas in the 1970s and launched Dolby Digital with the movie Batman Returns in 1992. Digital Theater Systems DTS debuted in 1993 with Jurassic Park, offering a higher bitrate alternative to Dolby. Both formats moved from movie theaters to laserdiscs, DVDs, and Blu-ray discs, and they have now evolved into streaming-friendly spatial audio technologies.
How Dolby and DTS Work
Sound engineers mix audio into separate channels like left, right, center, and surround sound. To fit this massive amount of data onto a disc or streaming signal, Dolby and DTS compress the audio using proprietary algorithms. When the bitstream reaches your AV receiver, soundbar, or PC software, the processor decodes the data and routes the precise audio signals to the corresponding speakers or headphones.
Types of Dolby and DTS Technologies
Channel-Based Formats
Dolby Digital AC 3: The standard 5.1 channel surround sound format used on DVDs and digital broadcasting.
DTS Digital Surround: The standard 5.1 channel rival to Dolby Digital offering higher bitrates up to 1.5 Mbps.
Dolby TrueHD and DTS HD Master Audio: Lossless 7.1 channel audio formats found on Blu-ray discs that deliver exact studio master replicas.
Object-Based Spatial Formats
Dolby Atmos: An object-based format that treats individual sounds as entities moving in a 3D space, including overhead ceiling channels.
DTS X: An object-based competitor to Dolby Atmos that functions similarly but does not require a specific speaker layout configuration.
Advantages and Limitations
Dolby Advantages
Universal compatibility across streaming platforms like Netflix, Disney, and Prime Video.
Highly efficient compression algorithms ideal for low bandwidth environments.
DTS Advantages
Lower compression ratios often preferred by audiophiles for physical media playback.
Flexible speaker placement configurations for object-based layouts.
Limitations
Both formats are proprietary and require licensing fees, which can increase hardware costs.
Legacy hardware may not decode newer spatial audio formats like Atmos or DTS :X, resulting in a fallback to standard stereo or 5.1 sound.
Dolby vs DTS Comparison,
Feature | Dolby Digital / Atmos | DTS Digital Surround / DTS X |
|---|---|---|
Standard 5.1 Bitrate | Up to 640 kbps | Up to 1.5 Mbps |
Lossless Formats | Dolby TrueHD | DTS HD Master Audio |
Spatial Audio Tech | Dolby Atmos | DTS X |
Streaming Dominance | High widespread support | Low: rarely used in streaming |
Physical Media Support | High Blu-ray and UHD | High Blu-ray and UHD |
Real World Applications
Home Theater Systems: AV receivers decode lossless TrueHD or DTS HD formats from Ultra HD Blu-ray players.
PC and Console Gaming: Games use Dolby Atmos for best Headphones or DTS Headphone X to provide spatial audio positioning for competitive advantages.
Streaming Media: Smart TVs decode Dolby Digital Plus and Dolby Atmos from streaming applications.
Related Technology Terms
Codec: Hardware or software that compresses and decompresses digital audio or video data.
Spatial Audio: Audio effects that manipulate sound to give a three-dimensional perception.
Bitrate: The amount of data processed per unit of time, typically measured in kilobits per second (kbps).
PCM: Pulse Code Modulation, an uncompressed digital audio format standard.