An organic light emitting diode display device arranged to compress compensation data assigned to pixels, the compensation data of each pixel comprising a trend component and a noise component, the trend component being data for compensating for a deviation of a threshold voltage of a driving transistor in said pixel and the noise component being data that is not used for compensating a deviation of a threshold voltage of a driving transistor in said pixel, comprising: a data driving unit that generates the compensation data; a data restoration unit that is configured to restore (n-1) th compensation data corresponding to an (n-1) th pixel of the display which is a directly adjacent pixel to the n th pixel of the display, wherein n is a natural number equal to or greater than 2, by: receiving a compressed trend component and quantized and compressed noise component corresponding to the (n-1) th pixel of the display; decompressing the trend component of the (n-1)) th compensation data and inverse quantizing and decompressing the received noise component of the (n-1) th compensation data; and summing the decompressed trend component of the (n-1) th compensation data and the inverse quantized and decompressed noise component of the (n-1) th compensation data; a trend calculation unit that receives n th compensation data corresponding to an n th pixel of the display and sets a trend component of the n th compensation data as being equal to the restored (n-1) th compensation data; a noise extraction unit that extracts a noise component of the n th compensation data by subtracting the calculated trend component of the n th compensation data from the received n th compensation data; and a noise encoder that quantizes and compresses the extracted noise component of the n th compensation data; wherein the trend calculation unit compresses, without quantizing, the trend component of the n th compensation data. a data driving unit that generates the compensation data; a data restoration unit that is configured to restore (n-1) th compensation data corresponding to an (n-1) th pixel of the display which is a directly adjacent pixel to the n th pixel of the display, wherein n is a natural number equal to or greater than 2, by: receiving a compressed trend component and quantized and compressed noise component corresponding to the (n-1) th pixel of the display; decompressing the trend component of the (n-1)) th compensation data and inverse quantizing and decompressing the received noise component of the (n-1) th compensation data; and summing the decompressed trend component of the (n-1) th compensation data and the inverse quantized and decompressed noise component of the (n-1) th compensation data; a trend calculation unit that receives n th compensation data corresponding to an n th pixel of the display and sets a trend component of the n th compensation data as being equal to the restored (n-1) th compensation data; a noise extraction unit that extracts a noise component of the n th compensation data by subtracting the calculated trend component of the n th compensation data from the received n th compensation data; and a noise encoder that quantizes and compresses the extracted noise component of the n th compensation data; wherein the trend calculation unit compresses, without quantizing, the trend component of the n th compensation data. receiving a compressed trend component and quantized and compressed noise component corresponding to the (n-1) th pixel of the display; decompressing the trend component of the (n-1)) th compensation data and inverse quantizing and decompressing the received noise component of the (n-1) th compensation data; and summing the decompressed trend component of the (n-1) th compensation data and the inverse quantized and decompressed noise component of the (n-1) th compensation data; a trend calculation unit that receives n th compensation data corresponding to an n th pixel of the display and sets a trend component of the n th compensation data as being equal to the restored (n-1) th compensation data; a noise extraction unit that extracts a noise component of the n th compensation data by subtracting the calculated trend component of the n th compensation data from the received n th compensation data; and a noise encoder that quantizes and compresses the extracted noise component of the n th compensation data; wherein the trend calculation unit compresses, without quantizing, the trend component of the n th compensation data.