Field/frame conversion of DCT domain mixed field/frame mode macr

Details Field/frame conversion of DCT domain mixed field/frame mode macr Field/frame conversion of DCT domain mixed field/frame mode macr

1998-06-30

2000-03-21

Tung, Bryan

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

348403, H04N 730

Patent

active

060410795

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.

REFERENCES:
patent: 5424778 (1995-06-01), Sugiyama
patent: 5432555 (1995-07-01), Park
patent: 5978514 (1999-11-01), Yamaguchi

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