| 摘要 |
In a pixel decoding method and apparatus, pixel dephasing caused for the field DCT mode and the frame DCT mode is to be eliminated to curtail the processing volume without detracting from the properties inherent in a picture produced on interlaced scanning. To this end, if the DCT mode is the field mode, a decimating DCT device for field mode 14 performs 4x4 decimating IDCT. If the DCT mode is the frame mode, the decimating DCT device for frame mode 15 performs IDCT on the totality of coefficients of the DCT block, separates the coefficients into two pixel blocks associated with the interlaced scanning and performs DCT separately for the separated two pixel blocks. The low frequency components of these two pixel blocks are IDCT and the two pixel are synthesized.
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