Scheme for detecting shot boundaries in compressed video data using inter-frame/inter-field prediction coding and intra-frame/intra-field coding

An apparatus for detecting a shot boundary from an input video data compressed by a coding scheme using both an inter-frame/inter-field prediction coding scheme and an intra-frame/intra-field coding scheme, comprising:

• a picture judgement unit for judging types of coding schemes used in the input video data and separating a Predictive-picture (P picture) sequence in the input video data which is compressed by an inter-frame/inter-field forward direction prediction coding scheme and an Intra-picture (I picture) sequence in the input video data which is compressed by an intra-frame/intra-field coding scheme;
• a P picture change calculation unit for calculating a P picture change from the P picture sequence, according to coded data contained in the P picture sequence;
• an I picture change calculation unit for calculating an I picture change from the I picture sequence, according to coded data contained in the I picture sequence;
• and
• a shot boundary detection unit for detecting a shot boundary by evaluating both the P picture change calculated by the P picture change calculation unit and the I picture change calculated by the I picture change calculation unit.

An article of manufacture, comprising:

• a computer usable medium having computer readable program code means embodied therein for causing a computer to function as a system for detecting a shot boundary from an input video data compressed by a coding scheme using both an inter-frame/inter-field prediction coding scheme and an intra-frame/intra-field coding scheme, the computer readable program means including:
• first computer readable program code means for causing the computer to function as a picture judgement unit for judging types of coding schemes used in the input video data and separating a Predictive-picture (P picture) sequence in the input video data which is compressed by an inter-frame/inter-field forward direction prediction coding scheme and an Intra-picture (I picture) sequence in the input video data which is compressed by an intra-frame/intra-field coding scheme;
• second computer readable program code means for causing the computer to function as a P picture change calculation unit for calculating a P picture change from the P picture sequence, according to coded data contained in the P picture sequence;
• third computer readable program code means for causing the computer to function as an I picture change calculation unit for calculating an I picture change from the I picture sequence, according to coded data contained in the I picture sequence;
• and
• fourth computer readable program code means for causing the computer to function as a shot boundary detection unit for detecting a shot boundary by evaluating both the P picture change calculated by the second computer readable program code means and the I picture change calculated by the third computer readable program code means.