Patent ID: 8160377
Filing Date: 2012-04-17
Classification: H04N

Abstract:
1. An image compression apparatus comprising: a frequency converter for performing frequency conversion on image data to generate frequency conversion data; a quantization part for performing quantization on said frequency conversion data to generate quantization data; a symbol generation part for symbolizing said quantization data to generate symbol data; and a coding part for coding said symbol data to generate coded data, wherein said symbol generation part has a quantization data input part for serially inputting a data string of quantization data consisting of a plurality of blocks; a quantization data information memory part capable of storing an absolute value, a sign and zero run information of one piece of quantization data of non-zero coefficient; and a symbol data output part for outputting an absolute value, a sign and zero run information of quantization data of the immediately preceding non-zero coefficient stored in said quantization data information memory part as said symbol data if the object quantization data which is inputted to said quantization data input part is a non-zero coefficient.