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Are Dolby 5.1 audio and other high resolution audio formats supported by HDMI?

Are Dolby 5.1 audio and other high resolution audio formats supported by HDMI?

Are Dolby 5.1 audio and other high resolution audio formats supported by HDMI? First we need to understand the different high resolution audio formats, then we will look at whether they are supported by HDMI, and which version, if applicable.

First lets look at Dolby ProLogic II. This format, also called a matrixed Analog 5.1 surround, is an analog matrixed surround sound standard that was created by Dolby Laboratories in 2000. It is 5.1 surround with a Front-left, a Front-center, a Front-right, a Surround-left, a Surround-right, and a subwoofer channel . Prologic II can process both the Dolby Prologic and the stereo sound sources and simulate 5.1 surround sound pretty well. While the movie industry has clearly standardized on digital encoding standards such as Dolby Digital and DTS, the music and video game industries still rely on Dolby Prologic II as the standard for surround. Dolby Prologic II has a music mode, movie mode, game mode and matrix mode. The music mode has additional center and surround channels, but does not change the nature of the left and right channels. The movie mode is designed to provide the 5.1 experience for movies that have not been digitally encoded. The game mode supports decoding for video games. The matrix mode supports the up-mixing of single channel mono content to surround sound.

Dolby Digital is a form of discrete digital 5.1 surround. Dolby Digital is a whole family of digital surround encoding technologies created by Dolby Laboratories. It is also known as AC-3, or Adaptive Transform Coder 3. It' has the capabilities for various channel configurations, however, it is most widely used as 5.1 surround. It includes Front-left, Front-center, Front-right, Surround-left, Surround-right, and subwoofer channels. Dolby Digital is a lossy encoding technology limited to 640 kbits per second, however, most DVD players may limit it to 448 kbits per second. Since Dolby Digital treats each channel discretely and is digitally encoded, Dolby Digital requires a digital decoder to provide the 5.1 audio standard. Most home theater receivers can uncode Dolby Digital, however, to get the signal from a source such as a DVD player to the receiver you must use a digital audio connection such as optical or coax cable.

DTS, also a form of Discrete Digital 5.1 Surround, stands for Digital Theater Systems. DTS is a competing standard to Dolby Digital. It is a discrete digital surround standard that provides multiple channel surround including the Front-left, the Front-center, the Front-right, the Surround-left, the Surround-right, and the subwoofer channels. Similar to Dolby Digital, it is different in one primary way. It provides lossy encoding up to 1536 kbits bandwidth on DVDs compared with Dolby Digital's 448 kbits. Depending on the sound system, a broader dynamic range and less hiss may be noticed. Like Dolby Digital, DTS requires that the home theater receiver supports decoding DTS and also requires optical or coax digital audio connections.

TrueHD stands for true high definition and can be a very confusing name. TrueHD has nothing to do with high definition video. It is an audio standard. TrueHD is a next generation encoding standard. This standard is mandatory on HD-DVD but is optional for BluRay players. TrueHD uses a HDMI 1.3 connection standard.

DTS-HD is the Digital Theater Systems' answer to Dolby TrueHD. The specification allows for unlimited channels that can be down-mixed to the number of channels supported on the home system. The bit-rate is also flexible because it can be as low as lossy DTS, or all the way up to lossless quality. DTS-HD standard is optional on HD-DVD and Blu-ray high definition discs.

HDMI has been designed from the starting version to carry 8-channels, of 192kHz, 24-bit uncompressed audio, which exceeds all available current consumer media format. Plus HDMI can carry any compressed audio format, such as Dolby or DTS. These compressed formats are the only multi-channel or high-resolution audio formats that can be carried across the older S/PDIF or AES/EBU interfaces. In addition, most existing HDMI sources can output any compressed stream, and the newer sources can output uncompressed 6-channel, 96kHz audio from a DVD-Audio disk. There are A/V receivers available on the market that can receive and process the 6- or 8-channel audio from HDMI. So the answer is yes, HDMI does support Dolby 5.1 audio and other high resolution audio formats.

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HDMI: Dolby, DTS, Formats | Sometimes displays that have HDMI inputs don't receive a picture from some cable television set-top boxes with HDMI outputs. What causes this problem, and can it be fixed? | What version of HDMI is needed to play BluRay and HD-DVD content in High Definition? | Are the HDMI versions 1.0 through 1.2 compatible with the latest next generation video game consoles that implement 1080p and the new capability for Deep Color by HDMI? | What is the new Deep Color capability of HDMI? | HDMI Maximum Cable Length? | What is the most common problem that devices with HDMI connections have with capability? | Can long cable lengths be used with HDMI? | Are Dolby 5.1 audio and other high resolution audio formats supported by HDMI? | Is SACD supported by HDMI? | What version of HDMI is needed for a consumer to view 1080p content? | What video types are supported by HDMI? | Is a secure interface provided with HDMI? | Are the HDMI specifications backward compatible with Digital Video Interface (DVI)? | HDMI What does it stand for | What consumer electronics products will have an advantage because of the new HDMI 1.3 capabilities? | How can I be sure that my HDMI cables will support higher speeds, deep color, and 1080p? | HDMI Backwards Compatibility | HDMI 1.3?

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