Method for Determining Frame / Field Discrete Cosine Transform in MPEG-2 Video Encoder and Its Apparatus

摘要

The present invention provides a frame / field discrete cosine transform of an MPEG video encoder using absolute value calculation to obtain the energy of the data difference between adjacent lines up and down of macroblock data of an MPEG video signal, and the energy of the data difference between the lines crossing one line. A judgment method and an apparatus thereof.;The apparatus for determining frame / field discrete cosine transform of an MPEG video encoder according to the present invention includes an input unit for receiving data and accumulating the data line by line, a storage unit for dividing and storing the data values summed by the input units line by line, and the data of the storage unit. An absolute value calculation unit for calculating an absolute value of a data value difference between up and down adjacent lines by using a value, and an absolute value calculator for calculating an absolute value of a data value difference between a line crossing one line, and data between adjacent lines output from the absolute value calculator. And a summation unit for adding the absolute values of the difference of values and absolute values of the data value difference between the lines crossing one line, and a comparing unit for comparing the sum of the absolute values output from the summation unit.