Many CD players using bitstream had resolution equivalent to 20 bit. One of the best Philips chips was the TDA1305. You could search the model number to find players and more specs on it. Companys like Naim, Roksan Caspian, Cambridge Audio (their best CD6 and DACMagic), Rotel and others used this chip.
It is old technology, but not yet inferior if coupled with good electronics.