 One subclass of relatively simple video coding formats are the intra-frame video formats, such as DV, in which each frame of the video stream is compressed independently without referring to other frames in the stream, and no attempt is made to take advantage of correlations between successive pictures over time for better compression.One example is Motion JPEG, which is simply a sequence of individually JPEG-compressed images.This approach is quick and simple, at the expense the encoded video being much larger than a video coding format supporting Inter frame coding.