For the commercial naming of a product, the frame rate is often dropped and is implied from context (e.g., a 1080i television set). A frame rate can also be specified without a resolution. For example, 24p means 24 progressive scan frames per second, and 50i means 25 interlaced frames per second.
Is there an answer to this question (If it cannot be answered, say "unanswerable"):  What does 54p mean?
unanswerable