Picture decoding method and apparatus using a 4.times.8 IDCT
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jan 4, 2005
Grant Date -
Apr 11, 2002
app pub date -
Dec 13, 2000
filing date -
Dec 16, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
It is targeted to prevent picture quality deterioration in the output picture information proper to the interlaced scanned picture and that ascribable to interlaced scanning. To this end, a decimating inverse discrete cosine transform unit 5 applies inverse orthogonal transform to four low-range coefficients in the horizontal direction and eight coefficients in the vertical direction among the respective coefficients of an orthogonal transform block of the compressed picture information of the input high resolution picture.
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