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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.
What Blu-ray and DVD Region Codes Are. Region Codes are pieces of data that are embedded into Blu-Ray and DVD Discs to act as a restriction. This data, or region code, is read by the player and if it doesnât recognize the region code as compatible or local, the disc will not play.