DEVICE FOR CONVERTING DISCRETE COSINE AND INVERSE DISCRETE COSINE

摘要

PURPOSE: A device for converting a discrete cosine and an inverse discrete cosine is provided to decrease the number of multiplications for a low electric power structure for a mobile multi media application and to perform a wave calculation in a quantization process and to satisfy a rule with respect to an accuracy of the IDCT(inverse discrete cosine transform). CONSTITUTION: In a discrete cosine transform device, a discrete cosine transform unit performs a wait calculation one time by a macro block in a quantization process. A memory stores the discrete cosine transform unit by a predetermined clock. A calculating unit performs a discrete cosine calculated unit by a predetermined clock. In an inverse discrete cosine transform device, an inverse discrete cosine transform unit performs a wait calculation one time by a macro block in a process for restoring quantization data. A memory stores the inverse discrete cosine transform unit by a predetermined clock. A calculating unit performs an inverse discrete cosine calculated unit by a predetermined clock.