Whitham, Curtis, Whitham & McGinn
Image data coding apparatus and method
 An image data coding apparatus and method to achieve a scale-down of a circuit without sacrificing compression efficiency. Input image data is delayed in a delay circuit and a coincidence detector compares the image data and delay image data to output a coincident code when these two are the same. An adaptive run length counter adaptively switches to select either a coincident code run length of a continuous length of the coincident codes calculated at an output time of the coincident codes or an image data run length of a continuous length of the same codes of the image data calculated at a non-output time of the coincident codes and outputs an adaptive run length. A Huffman coder carries out a Huffman coding of the adaptive run length. 
NEC Corporation
H H
H04N H03M
inventional inventional
Shigenori Akira
Kinouchi Sawada