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Video codecs are used in DVD and video CD players and recorders, video broadcast systems, personal computers, and a variety of other applications. In particular, they are widely used in applications that record or transmit video, which may not be feasible with the high data volumes and bandwidths of uncompressed video.
DVD Region Codes. There are 6 individual region codes with which DVDs are embedded. These 6 region codes function in the same way as Blu-ray region codes. A DVD disc from region 1 would be encoded as region code 1 and is therefore only operable in a DVD player that originated from region 1. The same is true for region 2, region 3, and so on and so forth, all the way to region 6. The map below shows how DVD region codes are separated and administered by geographic location. Region 1: USA & Canada, Bermuda, and US Territories