Conversion device for performing a raster scan conversion between a JPEG decoder and an image memory

A conversion device for performing a raster scan conversion between an image decoder and an image memory, the conversion device comprising:

• an input for receiving data corresponding to an image to be displayed, said received data being in a first data format defined by the image decoder output;
• and
• a processor for reconstructing and writing the image to be displayed into the image memory, in a second data format defined by the display module expected input, the processor comprising
• an intermediate memory,
• a first logic stage for writing the received data into the intermediate memory so that the written data form a sequence of data in the second data format, and
• a second logic stage for reading the written data in the intermediate memory, forming successive packets of read data, and successively writing the packets into the image memory so that the written packets together form the image.

A Digital Still Camera (DSC) comprising:

• a JPEG decoder;
• an image memory having a bandwidth greater than one byte;
• a conversion device for performing a raster scan conversion between the JPEG decoder and the image memory, the conversion device comprising
• an input for receiving data corresponding to an image to be displayed, said received data being in a JPEG decoder output data format;
• and
• a processor for reconstructing and writing the image to be displayed into the image memory, in a display module expected input data format, the processor comprising
• an intermediate memory,
• a first logic stage for writing the received data byte by byte into the intermediate memory at chosen addresses such that the written data form a sequence of data in the display module expected input data format, and
• a second logic stage for reading the written data in the intermediate memory, forming successive packets of read data having a size corresponding to the bandwidth, and successively writing the packets into the image memory at chosen addresses such that the written packets together form all the lines of the image.

A method for performing a raster scan conversion between an image decoder and an image memory, the method comprising:

• receiving data corresponding to an image to be displayed, said received data being in a first data format defined by the image decoder output;
• and
• reconstructing and writing the image to be displayed into the image memory, with a processor, in a second data format defined by the display module expected input, the processor comprising
• an intermediate memory,
• a first logic stage for writing the received data into the intermediate memory so that the written data form a sequence of data in the second data format, and
• a second logic stage for reading the written data in the intermediate memory, forming successive packets of read data, and successively writing the packets into the image memory so that the written packets together form the image.