SRS Demos 3D Sound For 3D Movies, TV



SRS Labs has finished developing Circle Cinema 3D (CC3D) post-processing technology and plans an International CES demonstration of the technology’s ability to make sound leap out from a 3D TV screen in sync with the 3D image appearing on screen.

The technology, which the company is marketing to CE chipmakers, could appear in 3D TVs, soundbars and A/V receivers in 2012, the company said.

Separately, SRS is demonstrating a proof-ofconcept version of Multi-Dimensional Audio (MDA) technology that would put mixing studios in control of how sound would follow the onscreen 3D action. It would require MDA technology to be installed in broadcast infrastructure as well as in consumer devices. As with CC3D, the technology could be used in TV-speaker systems, two-channel speaker systems and multi-speaker home-theater systems.

Both technologies could also be used to add 3D sound effects to 2D video sources.

In the two-channel and multichannel CC3D demonstrations, the CC3D technology “unburies” 3D spatial cues in a soundtrack to correlate audio-image depth with the depth of the onscreen 3D action. If an objects or people leap out from the screen, the sounds they make will also move toward the listener, a spokesman explained.

“What the technology does in terms of depth correlation with the onscreen picture is based on the accuracy of the actual audio mix,” he explained. “If the audio is accurately mixed to correlate with the 3D picture, then our 3D rendering technology will use the buried cues to accurately estimate the 3D spatiality of various effects while at the same time producing a very enveloping ambient environment.”

In two-channel applications, the technology delivers depth through front speakers with no need for separate surround speakers, he added.

Different versions of CC3D technology are available for licensing for 2.0-, 2.1-, 5.1- and 7.1-channel applications.

CC3D is part of a suite of SRS technologies called Studio Sound 3D, which replaces the company’s Studio Sound HD suite to add next-generation TruBass bass-enhancement technology and add improved equalization across the entire frequency range.

Other technologies carried over from the previous suite include TruVolume, a volume-leveling technology that eliminates abrupt changes in volume when sources are switched, commercials interrupt a TV program, and a program transitions from soft to loud passages.

SRS is demonstrating at the Trump hotel, where the company is also demonstrating the proof-ofconcept version of MDA, which enables studios to “mix for a 3D space,” the spokesman said. Studios will embed metadata in a soundtrack to define the XYZ coordinates of various sounds, and a consumer “rendering” device will read the metadata to “accurately place the audio in a 3D space” through two-channel and multichannel sound systems, he continued.

The object-based audio standard generates positional metadata associated with each sound, describing each sound’s position in three-dimensional space, the company further explained. The metadata is transmitted to an MDA-capable playback device, which uses the metadata to place the sound exactly where it needs to be, the company said.

When a playback system receives the metadata, it uses the information to place each sound knowing what speaker configuration is available and where the speakers are located, SRS said.


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