H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 5/44 (2006.01) G06T 3/40 (2006.01) G06T 9/00 (2006.01) H04N 7/26 (2006.01) H04N 7/50 (2006.01)
Patent
CA 2281391
An HDTV down conversion system including an apparatus for forming a low resolution video signal from an encoded video signal representing a video image. The encoded video signal is a frequency-domain transformed high resolution video signal with motion vectors. The apparatus includes a receiver for receiving the encoded video signal as a plurality of blocks of high resolution frequency- domain video coefficient values. A plurality of blocks comprises a macroblock. A down-conversion filter weights selected ones of the high resolution frequency- domain video coefficient values within each block to generate corresponding blocks of filtered frequency-domain video coefficients. An inverse-transform processor transforms each block of filtered frequency-domain video coefficients into a block of first- filtered pixel values. A pre-decimation filter performs inter-macroblock inter-block filtering of the plurality of blocks of first-filtered pixel values and provides corresponding blocks of second-filtered pixel values. A decimating processor deletes selected ones of the second-filtered pixel values within each block to provide blocks of low resolution video signal pixel values.
Fetherstonhaugh & Co.
Matsushita Electric Industrial Co. Ltd.
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