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Inside Look at Surround Sound Formats
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Post 1 made on Tuesday October 11, 2011 at 10:12
Morbo
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Inside Look at Surround Sound Formats
By Robert Archer
Explaining lossy vs. lossless multichannel audio and how the engineering community handles the new format’s additional capabilities.

Despite the heavy emphasis on video over the past 15 years, the evolutions of home audio and video have actually taken nearly identical paths.

Looking back on the home A/V market in the mid 1990s the industry began a transition away from the VCR and its low-resolution video and Dolby Pro Logic audio technologies into the DVD optical disc format.



As everyone knows the DVD format offered consumers an improved picture with 480 lines of resolution and progressive deinterlacing options. It also offered a choice of audio formats that included standard PCM stereo, Pro Logic and discrete multichannel DTS and Dolby Digital.

As the decade of the 1990s drew to a close the video category moved onto high-definition (HD) video, while the audio market experimented with the higher resolution Super Audio CD (SACD) and DVD-Audio formats (DVD-A).

More recently the A/V market has fully adopted HD in the form of the Blu-ray disc format. Along with the HD 1080 picture quality of Blu-ray, the format also offers the lossless audio formats DTS-HD Master Audio and Dolby TrueHD.

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