Patent ID: 7447264

Claim:
A temporal scalable moving-picture video signal coding method comprising the steps of: converting an input interlaced moving-picture video signal carrying first and second alternate fields into a progressive moving-picture video signal at the same frame rate per second as the interlaced moving-picture video signal, the progressive moving-picture video signal having scanning lines at the same timing as scanning lines of the first fields of the interlaced moving-picture video signal; encoding the progressive moving-picture video signal to produce a first progressive bitstream; encoding the second fields of the interlaced moving-picture video signal, the second fields being different in time from frames of the progressive moving-picture video signal, with inter-picture prediction using a locally decoded picture signal as a reference video signal, the locally decoded picture signal being produced by locally decoding the progressive moving-picture video signal, the second fields having scanning lines half of scanning lines of the progressive moving-picture video signal, thus producing a second bitstream; and multiplexing the first and second bitstreams into an output temporal scalable moving-picture video bitstream.