An increasing number of recordings is available in the so-called 2+2+2 surround sound format, where in addition to two front and two rear speakers, a third pair of speakers is placed at an elevated position above the front speakers. Recently, the MPEG Surround standard has been finalized as an efficient stereo backwards compatible surround sound coding format. The present paper studies the applicability of MPEG Surround for efficient coding of "2+2+2" content. Several alternative approaches are outlined and evaluated by means of subjective listening tests.
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https://aes2.org/publications/elibrary-page/?id=13977
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