Patent ID: 8160376
Filing Date: 2012-04-17
Classification: H04N

Abstract:
1. An image compression apparatus comprising: a frequency converter for performing frequency conversion of original image data on a macroblock-by-macroblock basis to generate frequency conversion data; a quantization part for performing quantization of said frequency conversion data to generate quantization data; and a coding part for generating coded data from said quantization data to output stream data including said coded data, wherein said coding part includes an extracting part for extracting coding object data which is to be entropy coded, from said quantization data; a memory part for storing said coding object data extracted by said extracting part; an entropy coding part for reading said coding object data out from said memory part and performing entropy coding of said coding object data which is read out, to generate said coded data; a pattern information generation part for acquiring said coding object data from said extracting part to generate pattern information indicating whether value of said coding object data is “0” or not; and an output part for outputting said pattern information and said coded data in a predetermined order, to output said stream data.