ting.han

Hi, I was looking at some IP camera specifications and I came across mainly the two ways of describing their resolution. One is using the HTVL, which in my opinion should be used only for analog cameras. Another standard is pixel. Sometimes a camera would have both on their spec sheet. What is the right way to describe the resolution of a digital camera? Why are HTVL used in some cases? Please share your thoughts. Thanks for your time.