Spot on Vyokyong, you said what I didn't have the patience to do.
One more thing though there was one more HDCD chip bought out briefly after the famed PMD-100 HDCD, the PMD-200.
It was used in my Redbook CD player The Cary 303/200 which also had what I believe to be the last and best R2R Multibit dac ever made in it, the almost extinct PCM1704K dac.
Out of the box this is a nice sounding player, but with some serious work http://www.diyaudio.com/forums/digital-source/227677-using-ad844-i-v-52.html#post4404793 to the I/V and output buffer it is very hard to beat.
Cheers George