Moving image coding apparatus, moving image decoding apparatus, and methods therefor
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United States of America Patent
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Nov 27, 2007
Grant Date -
Jan 22, 2004
app pub date -
Jul 17, 2003
filing date -
Jul 22, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
There are provided a moving image coding apparatus and moving image decoding apparatus which allow efficient decoding of an interlaced image from the coded data of a progressive image, and methods for the apparatuses. Noninterlaced moving image data is input from a moving image data input unit (101). Two consecutive frames are discriminated by a switch (102). A line interleaving unit (103) then generates new image data by alternately arranging the line data of the respective frames upon changing the order. A discrete wavelet transform unit (104) performs two-dimensional discrete wavelet transform for this image data to decompose it into seven subbands. Each subband is then coded.
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