Patent ID: 7894681

Claim:
An apparatus for sequentially decoding progressive scan JPEG images comprising Joint Pictures Experts Group (JPEG) progressive scan image data encoded using a plurality of scans, each of the scans performed on the entire image, the progressive scan image data comprising a plurality of rectangular minimum coded units (MCUs), the apparatus comprising: a decoder progressively decoding an entire MCU of a line of the JPEG progressive scan image, on a progressive scan-by-scan basis to completely decode the MCU of the JPEG progressive scan image data; and a line buffer coupled to the decoder and receiving at least one line of decoded image data from the MCU in an output buffer, accumulating subsequent data from corresponding lines of subsequent decoded MCUs to store at least one complete line of the JPEG progressive scan image data, and outputting the one complete line of decoded image data in a sequential line-by-line manner from the output buffer to sequentially display a progressive scan JPEG image.