Hi Stefan, EN 300 706 Annex A.1 recommends to insert a filler/page termination header with page number 0xFF if only a single page is transmitted, to commit the page to memory as well as display subtitles immediately rather than at the reception of the next page header, which may not occur until the subtitles are changing again. The libzbvi decoder recognizes 0xFF headers, but as you realized, not their omission. The check was added as a work-around for some stations repeating headers as filler, and...
Fix tests with gcc-6
test-pdc.h:92: bad sizeof ?
Fix "small d with stroke" in WSTFONT2
Decode "@" sign via X/26 packets according to EN 300 706