My limited understanding is that HDCD discs are encoded using 20bit instead of 16bit, giving a more accurate and detailed analog waveform result. It should be an improvement on standard Redbook CD's, and I would assume that discs labelled "digitally remastered using HDCD technology" means they have the 20bit samples; standard CD players must ignore the extra 4 bits, but will still play them.
Unfortunately, HDCD didn't seem to catch on, probably due to SACD and DVD-A. I had a basic DVD player that was HDCD capable, but could find very few discs here in Australia, so ended up buying a good standard CD player instead.
Unfortunately, HDCD didn't seem to catch on, probably due to SACD and DVD-A. I had a basic DVD player that was HDCD capable, but could find very few discs here in Australia, so ended up buying a good standard CD player instead.