PC audio - Dolby Home Theater v4

PC Audio Technology

Dolby Home Theater v4

Dolby® Home Theater® v4 comprises a suite of technologies that work together to deliver a cinematic surround sound experience on your desktop or laptop with crisp and clear PC audio. You can enjoy it on any set of headphones, over the built-in or external speakers, or through a home theater system.

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Dolby Home Theater v4 fixes all the problems typically associated with PC audio—tinny sound, weak volume, and buzzing and rattling. Experience full-impact surround sound anywhere with Dolby Home Theater v4 on your PC. All the power and nuance of the cinema, all the immediacy of live performance—now from a laptop.

Dolby Home Theater v4 Benefits

Brings Dolby 5.1 or 7.1 cinematic surround sound to your PC for all content

Makes it easy to connect your PC to your home theater system

Locks in your preferred volume level for more consistent listening

Lets you play your audio much louder over the built-in speakers, with less distortion

Provides you with total control over your PC’s audio settings

Dolby Home Theater v4 is designed into select PC models and is not available for direct purchase or download. Our experts work with manufacturers to custom-tune each model for the best possible PC audio performance.

How Dolby Home Theater v4 Works

Sound delivered over a laptop or desktop computer has inherent audio problems. These originate in both the quality of the source material and in the playback process.

Typical problems with sources include:

Dull sound and unintelligible dialogue on user-generated content

Wildly varying volume levels from one source to the next

Content not produced in surround sound

The PCs themselves are limited by physical designs that dictate small speakers and underpowered amplifiers. Problems include:

Irregular frequency response with no highs or lows

Unnatural, colored sound

Volume levels typically not loud enough

Distortion and annoying mechanical vibrations when sound is turned up

Dolby Home Theater v4 Adds Surround Sound and More

Designed into a PC, Dolby Home Theater v4 first applies processing that fixes any problems with the source material. It then fixes playback problems by compensating for both general and specific mechanical constraints. This processing ensures that our unique custom-tuning is designed for each and every computer model that includes Dolby Home Theater v4. Dolby Home Theater v4 technologies:

Use our latest and most advanced algorithms

Leverage our four-plus decades of research into how people perceive sound

Match human audio perception

Are built on a common processing framework

Work intelligently together

Learn about the individual technologies in Dolby Home Theater v4 in the Technologies section.

PCs with Dolby Home Theater v4

Dolby Home Theater v4 is designed into select PC models and is not available for direct purchase or download. Our experts work with PC manufacturers to custom-tune each model for the best possible PC audio performance.

A few of the PCs with Dolby Home Theater v4 include models from these manufacturers:

Acer

HP

Lenovo

Sony

Toshiba 

Featured Products

To help give you an idea of what’s out there, we feature a number of select products from our partners. You’ll find Dolby Home Theater v4 in many more PCs than we show here. Our product listings are not meant as specific recommendations or ratings.

HP Pavilion DV4

Lenovo ThinkPad T430S

Lenovo ThinkPad X1 Carbon

Compatibility

Dolby Home Theater v4 works with any audio you play back on your PC, including audio you may create.

Dolby Home Theater v4 Technologies

Dolby® Home Theater® v4 technologies work together intelligently to correct problems with the content and then with playback on the computer. Our engineers specifically tune each computer model to ensure the best possible sound.

Improving Content Quality from Any Source

Surround Decoder

Advanced frequency-domain matrix surround decoder

Creates 5.1 or 7.1 sound from any two-channel input

Creates 7.1 sound from 5.1-channel input

Dialogue Enhancer

Improves clarity of speech on all material

Intelligently detects presence of speech and applies processing

Intelligent Equalizer

Provides consistent timbre (tone) for all audio material

Dynamically adjusts tone during playback; user controlled

Volume Leveler

High-quality volume control solution

Maintains chosen volume consistently across all sources

Enhancing the PC Playback System


Surround Virtualizer

Delivers enveloping virtual surround effect from all sources

Works with your PC’s built-in speakers or any headphones

Volume Maximizer

Boosts available volume by up to 12 dB (more than doubles the volume level)

Intelligently processes signal to avoid distortion

Audio Optimizer

Produces flat frequency response, as on a high-end audio system

Custom-tuned to compensate for speaker response irregularities

Audio Regulator

Eliminates any distortion caused by speaker or chassis resonances

Custom-calibrated for specific PC models

Graphic Equalizer

Allows you to adjust frequency response to your liking

Ten bands for complete control

Dolby Digital Output

Encodes any audio into Dolby Digital for listening through your home theater

Connects to home theater system via HDMI® or S/PDIF

Compare Dolby Home Theater v4 Features

Dolby® Home Theater® v4 is one of two Dolby technology suites that are part of the Dolby PC Entertainment Experience v4. Dolby Advanced Audio v2 is designed to deliver a personal surround sound experience.

Dolby Home Theater v4 Compared to Dolby Advanced Audio v2

Feature

Dolby Home Theater v4

Dolby Advanced Audio v2

   

Dolby Surround Sound

 

 

Surround Expansion (Surround Decoder)

Surround Virtualizer for Headphones

 

Surround Virtualizer for Built-in Speakers

Dolby Digital Output

 

 

 

 

PC Tuning and Optimization

 

 

Built-in Speaker Tuning (Audio Optimizer)

Built-in Speaker Distortion Prevention
(Audio Regulator)

 

 

 

Equalization

  

Graphic Equalizer

Intelligent (Real-Time) Equalizer

 

Dialogue Enhancer

 

 

  

Volume

 

 

Volume Leveler

Volume Maximizer

Previous Generation Dolby Home Theater

Dolby Home Theater v4 replaced Dolby Home Theater v3. This chart shows the differences between the two technology suites.

Dolby Home Theater v4 Compared to Dolby Home Theater v3

 

Feature

Dolby Home Theater v4

Dolby Home Theater v3

   

Dolby Surround Sound

 

 

Surround Expansion (Surround Decoder)


Surround Virtualizer for Headphones

Surround Virtualizer for Built-in Speakers

Dolby Digital Output

 

 

 

PC Tuning and Optimization

 

 

Built-in Speaker Tuning (Audio Optimizer)

Built-in Speaker Distortion Prevention (Audio Regulator)

 

   

Equalization

 

 

Bass and High-Frequency Enhancement

Graphic Equalizer

 

Intelligent (Real-Time) Equalizer

 

Dialogue Enhancer

 

   

Volume

 

 

Volume Leveler

 

Volume Maximizer