HDMI (High-Definition Multimedia Interface) is the first and only industry-supported, uncompressed, all-digital audio/video interface. By delivering crystal-clear, all-digital audio and video via a single cable, HDMI dramatically simplifies cabling and helps provide consumers with the highest-quality home theater experience. HDMI provides an interface between any audio/video source, such as a set-top box, DVD player, or A/V receiver and an audio and/or video monitor, such as a digital television (DTV), over a single cable.HDMI supports standard, enhanced, or high-definition video, plus multi-channel digital audio on a single cable. It transmits all ATSC HDTV standards and supports 8-channel, 192kHz, uncompressed digital audio and all currently-available compressed formats (such as Dolby Digital and DTS), HDMI 1.3 adds additional support for new lossless digital audio formats Dolby® TrueHD and DTS-HD Master Audio™ with bandwidth to spare to accommodate future enhancements and requirements.

Et 6-kanal surround system der er udviklet af Dolby Laboratories. Lyden er separeret til foran-venstre, midt, foran-højre, bagved-venstre, bagved-højre og lavfrekvenseffekter.

Dolby® Pro Logic® IIx - Pro Logic IIx is a technology to expand any existing stereo- or 5.1-channel audio to a 6.1- or 7.1- channel playback.

Dolby® Pro Logic® II technology processes any stereo (two-channel) audio into five playback channels of full-bandwidth surround sound. It's ideally suited for home theater systems, PCs, game consoles, and multichannel in-car audio systems (called Dolby Pro Logic II Surround).
It has no impact on the game console's CPU, which means all this extra audio won't slow your game down.

Dolby Pro Logic IIz expands on Pro Logic IIx with the addition of creating front height channels above the front left and right speakers, expanding a 5.1 or 7.1 system into 7.1 Height or 9.1. It identifies spatial cues in low-level, uncorrelated information, such as ambience and effects like rain or wind, and directs it to the front height speakers.The channels it adds are matrixed, not discrete.Dolby Surround is the consumer version of the original Dolby multichannel analog film sound format (Dolby analog and Dolby SR [Spectral Recording]). When a Dolby Surround soundtrack is produced, four channels of audio information—Left, Center, Right, and Mono surround—are matrix-encoded onto two audio tracks. These two tracks are then carried on stereo program sources such as videotapes and TV broadcasts into the home, where they can be decoded by Dolby Pro Logic® to recreate the original four-channel surround sound experience.

A result of Dolby's expertise in matrix surround processing, Dolby Pro Logic was the foundation for multichannel home theater, and was the reference decoder for creating the surround sound audio tracks in thousands of commercially available videocassettes, laser discs, DVDs, and television programs.

With the introduction of the Dolby Digital multichannel film sound format, Dolby Digital has replaced Dolby Surround as the preferred technology to deliver multichannel audio to consumers via DVD-Video, digital television, and games. However, every Dolby Digital decoder also provides a Dolby Pro Logic-compatible stereo signal on its analog outputs.

Digital Theater Systems er et firma der producerer multikanal lydsystemer til biograf og hjemmebiografer. Refererer til et 6-kanal lydsystem.

High-quality 96-kHz, 24-bit (96/24) lydgengivelse fra ordinære DVD-videooptagelser er begrænset til kun to kanaler og der er også begrænsinger på billedet. DVD-Video optaget i DTS 96/24 giver dog høj kvalitet.5.1-kanal lydgengivelse i høj kvalitet. DTS 96/24 lader en nyde bade digital udgang og video udgang fra ens DVD-afspiller.

(Digital Theatre Surround) opleves ofte som mere dynamisk og powerfuldt da det ikke er komprimeret så hårdt som Dolby digital. Vi har også på FreQuence kunne mærke en stærkere seperation imellem de enkelte kanaler på langt de fleste DTS indspildninger. Det er ligesom effekterne står mere præcist højttalerne imellem. DTS kan bestå af op til 8 kanaler, men det mest normale er 5+1. der findes dog enkelte filmtitler der er indspillet i 6+1(DTS-ES) tre front - & tre baghøjttalere + subwoofer. DTS og Dolby Digital bør altid være synligt når du vælger surround forstærker/receiver eller DVD.

Indikerer at receiveren er i stand til at afspille nye DVD-formater.