What is an IP camera?

"HD" network cameras topic we have talked about a lot, whether in the security event, security professional on the market, or in the manufacturer's sales promotion and publicity, the "HD" concept of surveillance cameras constantly for speculation, the market for high-definition growing demand for video surveillance, especially in transport, airports, finance, high-end market demand amplification, making high-definition surveillance cameras become a popular surveillance products.

"HD" surveillance cameras whether the standards?