Patent ID: 6282242
Filing Date: 2001-08-28
Classification: H04N

Abstract:
A data compression device that switches between intra-frame coding and inter-frame coding for compressing the desired video data wherein;said video data is compressed by means of a previous data compression process and the data quantity resulting from the process is detected,conditions for said data compression are set by means of the target bit quantity established based on the data quantity resulting from said previous data compression process,said video data is compressed according to conditions set for the data compression processing,conditions set for said data compression process are:one intra-frame coding to the next intra-frame coding is specified as one block, a data quantity assigned to the entire video data is allotted to each block based on data quantity from said processing results, and said target bit quantity is set for each block after which said target bit quantity is equally allotted to each frame of said block, andin the process for allocating said target bit quantity, the target bit quantity is corrected according to the individual block structure after allocating said target bit quantity to each said block in order to match the data quantity ratio from said processing results in each block.