Field/frame conversion of DCT domain mixed field/frame mode macroblocks using 1-dimensional DCT/IDCT
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United States of America Patent
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Mar 21, 2000
Grant Date -
N/A
app pub date -
Jun 30, 1998
filing date -
Jun 30, 1998
priority date (Note) -
Expired
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Abstract
A field/frame conversion method for compressed digital video, especially MPEG type video, having mixed field/frame mode macroblocks in the DCT domain utilizes a 1-D IDCT/DCT approach rather than the conventional 2-D IDCT/DCT approach. A vertical 1-D IDCT is performed on the DCT domain mixed field/frame mode macroblock to obtain a horizontal 1-D DCT domain macroblock. Thereafter, field/frame conversion is performed on the horizontal 1-D DCT domain macroblock to yield a field or frame mode horizontal 1-D DCT domain macroblock, depending on the required conversion. Finally, a vertical 1-D DCT is performed on the field/frame converted horizontal 1-D DCT domain macroblock to yield a 2-D DCT domain macroblock.
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