Binary data counter, area information extractor and huffman converter

A binary data counting device for counting the number of either one of the binary digits in data expressed in a binary manner comprising N bits, including:

• N flip-flops of which the inputs are each bit value of said data expressed in a binary manner comprising N bits, respectively;
• and
• a shifter array in which N×(N+1)/2 shifters with two inputs and one output are arranged in a triangle shape of N rows with a diagonal part of the arrangement in an N×N matrix shape as an oblique side and with two side parts arranged in said matrix shape as the base and a perpendicular side, respectively, each of the outputs of said N flip-flops being control signals of the shifters for each row making up said triangle shape, and the outputs of the N shifters in the Nth row arranged on said base of said triangle shape being outputted as binary data of N bits,
• said binary data counting device being characterized in that:
• when two inputs of said shifter are assumed as first and second inputs, it is selected whether the first input is outputted or the second input is outputted as an output of said shifter by said control signal;
• one of the binary values is inputted to said first input of the shifter arranged on said oblique side part in said triangle shape and an output of the shifter belonging to said oblique side part of the front row is inputted into said second inputs of the shifters from the second row to the Nth row of said oblique side part;
• the other binary value is inputted into said second input of the shifter arranged on said perpendicular side part of said triangle shape and an output of the shifter belonging to said perpendicular side part of the front row is inputted into said first inputs of the shifters from the second row to the Nth row of said perpendicular side parts;
• and
• an output of the shifter in the same column of the front row is inputted into said first input of the shifter arranged in areas other than said oblique side part or said perpendicular side part of said triangle shape and an output of the shifter arranged on the perpendicular side next to the shifter in the same column of the front row is inputted into said second input.