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A Super Audio CD uses two layers and the standardized focal length of conventional CD players to enable both types of player to read the data. Objective lenses in conventional CD players have a longer working distance, or focal length, than lenses designed for SACD players. In SACD-capable DVD, Blu-ray and Ultra HD Blu-ray players, the red DVD ...
The biggest competition to DualDisc was the hybrid Super Audio CD (SACD), which was developed by Sony and Philips Electronics, the same companies that created the standard CD. DualDiscs and hybrid SACDs were competing solutions to the problem of providing higher-resolution audio on a disc that can still be played on conventional CD players.
Super Audio CD/CD hybrid discs contain both an SACD layer and a standard CD layer. For the SACD layer, the recording is converted into a DSD file instead of the PCM Linear that ordinary CDs use. The DSD coding has a sampling rate of 64 times the CD Audio sampling rates of 44.1 kHz, for a rate of 2.8224 MHz (1 bit times 64 times 44.1 kHz).
Direct Stream Digital (DSD) is a trademark used by Sony and Philips for their system for digitally encoding audio signals for the Super Audio CD (SACD).. DSD uses delta-sigma modulation, a form of pulse-density modulation encoding, a technique to represent audio signals in digital format, a sequence of single-bit values at a sampling rate of 2.8224 MHz.
Sony Digital Audio Disc Corporation (Sony DADC) is a manufacturer of CDs, DVDs, UMDs, and Blu-ray Discs.The company has many plants worldwide. Although it primarily services Sony Music Entertainment-owned record labels, Sony Pictures Home Entertainment, and Sony Interactive Entertainment, it also manufactures discs for other labels, home entertainment distributors, and video game publishers.
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The first commercially available audio CD player, the Sony CDP-101, was released in October 1982 in Japan. The format gained worldwide acceptance in 1983–84, selling more than a million CD players in its first two years, to play 22.5 million discs, [2] before overtaking records and cassette tapes to
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