| 摘要 |
Video data formatting apparatus for formatting video data representing successive picture for a data handling channel having a predetermined data capacity per picture, comprises:<BR> ```means for receiving an input video signal representing successive pictures, the input video signal having associated with it at least data defining at least some of the coding decisions made during an encoding of pictures represented by the input video signal into a compressed form having group-of-pictures (GOP) format including at least one inter-picture encoded picture;<BR> ```means for converting the input video signal into an intermediate compressed video signal, the intermediate compressed video signal having a GOP format in which each GOP contains fewer pictures than a GOP associated with the input video signal;<BR> ```means for deriving a metadata signal from the input video signal, the metadata signal indicating at least the data defining at least some of the coding decisions;<BR> ```means for generating a data quantity allocation to control the transcoding into the intermediate video signal, whereby each picture of the intermediate video signal is transcoded so as not to exceed a respective data quantity allocation, in which the generating means calculates the data quantity allocation for each picture to be substantially equal to:<BR> ```the predetermined data capacity per picture<BR> ```less<BR> ```the quantity of metadata for the input video signal GOP containing that picture divided by the number of pictures (n) in that input video signal GOP. |
