| 摘要 |
An inputted digital signal of a first format (DV video signal) is restored to a variable-length code by having its framing cancelled by a de-framing section 11 , then decoded by a variable-length decoding (VLD) section 12 , inversely quantized by an inverse quantizing (IQ) section 13 , and inversely weighted by an inverse weighting (IW) section 14 . Then, required resolution conversion in the orthogonal transform domain (frequency domain) is carried out on the inversely weighted video signal by a resolution converting section 16 . After that, the video signal having the resolution converted is weighted by a weighting (W) section 18 , then quantized by a quantizing (Q) section 19 , coded by variable-length coding by a variable-length coding (VLC) section 20 , and outputted as a digital signal of a second format (MPEG video signal).
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