The HDCD (High Definition Compatible Digital®
technology makes it possible to get closer to the original sound. This is facilitated through a sophisticated system, where a 20 - 24 bit sound signal is encoded onto an ordinary CD’s 16 bits through dithering. Open picture.
When played on a CD player, DVD player or amplifier with an HDCD decoder the sound signal is then decoded again to 20 -24 bits.
The engraver has an extra 6 dB available (7 dB extra at low level), which gives noticeably reduced distortion levels and an extra enhanced resolution. All parameters of the sound image are enhanced, resulting in an all-improved sound! A dynamic range of up to 115 dB can be obtained.
An HDCD equipped device gives even ordinary CDs a high sound quality. The already high resolution sound of DVD audio improves with the HDCD technology. The HDCD circuit is PDM100 (44.1 / 88.2 kHz) and PDM200 (48 / 96 176.4 / 192 kHz) which even can be used with DTS.
The creators of the HDCD technology are Keith O. Johnson and Pflash Pflaumer. Together they developed the idea of HDCD between 1986 and 1991. In 1996 they started Pacific Microsonics (PMI), an audio technology company based in California. In September 2000, (PMI) was acquired by Microsoft