Dolby ProLogic is an analog technology. It analyzes phase directions and delays in signals as electrical voltage fluctuations, not as bits and bytes.
There is no technical relation between Dolby ProLogic (analog surround sound mixing) and Dolby Digital (digital audio compression), except for the same company which developed them.
A third different, unrelated technology developed by the Dolby Labs are noise reduction techniques for audio on magnetical tapes.
And a fourth, even more unrelated remark: Thomas Dolby made a song about Science! But his stage name was only inspired by the noise reduction techniques, he was not a member of Dolby Labs...