Scheme for detecting shot boundaries in compressed video data using inter-frame/inter-field prediction coding and intra-frame/intra-field coding
First Claim
1. A method 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 the steps of:
- (a) calculating a Predictive-picture (P picture) change from a P picture sequence in the input video data which is compressed by an inter-frame/inter-field forward direction prediction coding scheme, according to coded data contained in the P picture sequence;
(b) calculating an Intra-picture (I picture) change from an I picture sequence in the input video data which is compressed by an intra-frame/intra-field coding scheme, according to coded data contained in the I picture sequence; and
(c) detecting a shot boundary by evaluating both the P picture change calculated at the step (a) and the I picture change calculated at the step (b).
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Accused Products
Abstract
A scheme for detecting shot boundaries in the compressed video data at high speed and high accuracy. In this shot boundary detection scheme, a Predictive-picture (P picture) change is calculated from a P picture sequence in the input video data which is compressed by an inter-frame/inter-field forward direction prediction coding scheme, according to coded data contained in the P picture sequence, while an Intra-picture (I picture) change is calculated from an I picture sequence in the input video data which is compressed by an intra-frame/intra-field coding scheme, according to coded data contained in the I picture sequence. Then, a shot boundary is detected by evaluating both the P picture change and the I picture change.
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Citations
41 Claims
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1. A method 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 the steps of:
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(a) calculating a Predictive-picture (P picture) change from a P picture sequence in the input video data which is compressed by an inter-frame/inter-field forward direction prediction coding scheme, according to coded data contained in the P picture sequence; (b) calculating an Intra-picture (I picture) change from an I picture sequence in the input video data which is compressed by an intra-frame/intra-field coding scheme, according to coded data contained in the I picture sequence; and (c) detecting a shot boundary by evaluating both the P picture change calculated at the step (a) and the I picture change calculated at the step (b). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. 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:
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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. - View Dependent Claims (33, 34, 35, 36)
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37. An article of manufacture, comprising:
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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. - View Dependent Claims (38, 39, 40, 41)
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Specification