Low-power display driving circuit performing internal encoding and decoding and operating method thereof

A method of operating a display driving circuit outputting a still image, the method comprising:

• generating a plurality of segments of frame data based on an input bit stream in a first frame period;
• determining at least one of the segments of frame data as data to be encoded, and performing internal encoding on the data to be encoded;
• altering at least one of the data to be encoded and an encoding setting when the internal encoding fails;
• and
• repeating the internal encoding in a second frame period.

A display driving circuit comprising:

• a memory configured to store an input bit stream;
• a first decoder configured to decode the input bit stream to generate first frame data;
• a plurality of image processors configured to perform image processing on the first frame data to generate a plurality of segments of processed data;
• an internal encoder configured to perform internal encoding on at least one of the segments of processed data;
• an internal decoder configured to decode the internal bit stream stored in the memory and output the decoded bit stream when the internal encoding is successful;
• and
• a controller configured to change an encoding setting of the internal encoder and to control the internal encoder to repeat the internal encoding, when the internal encoding fails.