Stan Jones wrote:
Font size and style vs the reduced pixel size of DVD seems a probable explanation. I can'f find the link to the information that I think would be helpful to you.
Absolutely correct.
DVD SubPictures allow for 3 colours with no Anti-Aliasing allowed, except for using the main colour at full opacity & then the second 2 with the same colour at reduced opacity (66 & 33% respectively) and DVD also uses non square pixels - PAL Widescreen being the most distorted. Plus it is a mere 720x480 (NTSC).
BD allows 256 colours, so plenty of scope for anti-aliasing, and it uses square pixels at 1920x1080 (maximum) down to SD.