Australia uses the PAL system, as does Europe, NZ and a host of other countries. This system is based on 50 Hz, so we have 25p, 50p, 50i frame rates. The US use the NTSC system based on 60Hz, hence 23.95p, 59.94i, 59.94pand 24p frame rates. This system is used in the US, Canada, and some other countries (go check Wikipedia for more information, there is also SECAM and variations on PAL and NTSC systems). The generalization that all TV's are made in China is incorrect, many are but other countries eg Japan, also produce TV's. Regardless where they are made, they are made to some standard. Australian TV's will show NTSC without problems, the US TV's will not show PAL. So there are differences in the systems. For a great deal more information, check other articles on the internet. It is big, intricate topic. Suffice it to know that in Australia we use the PAL system and the US uses the NTSC system.