Inter-frame predictive encoding system with encoded and transmitted prediction error
DCFirst Claim
1. An inter-frame predictive encoding system comprising:
- means for separating successively-inputted frames of a video signal into reference frames and dependent frames, the reference frames being spaced at predetermined intervals, the dependent frames situated between the reference frames;
means for encoding display information of the reference frames;
means for predicting display information of each dependent frame on the basis of display information of reference frames which precede and follow said dependent frame respectively;
means for generating an error between the predicted display information and corresponding actual display information of said dependent frame; and
means for encoding said error.
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Abstract
In an inter-frame predictive encoding system, reference frames are set. The reference frames are separated at equal intervals. The reference frames are selected from successively inputted frames of a video signal. Each of the reference frames is encoded. A prediction signal for a dependent frame between the reference frames is generated on the basis of a signal of the reference frames which precedes and follows the dependent frame respectively. A signal of the dependent frame is generated on the basis of the prediction signal corresponding thereto. An error of the predicting of the signal of the dependent frame is encoded. .Iadd.A complementary decoding system reconstructs the video signal from the encoded reference frames and the encoded error. .Iaddend.
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Citations
7 Claims
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1. An inter-frame predictive encoding system comprising:
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means for separating successively-inputted frames of a video signal into reference frames and dependent frames, the reference frames being spaced at predetermined intervals, the dependent frames situated between the reference frames; means for encoding display information of the reference frames; means for predicting display information of each dependent frame on the basis of display information of reference frames which precede and follow said dependent frame respectively; means for generating an error between the predicted display information and corresponding actual display information of said dependent frame; and means for encoding said error. - View Dependent Claims (2, 6)
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3. In an inter-frame predictive encoding system comprising means for performing motion-compensated inter-frame prediction using motion vectors between successively inputted frames of a video signal;
- the improvement comprising;
means for setting specified frames separated at equal intervals, the specified frames being selected from successively inputted frames of a video signal; means for detecting motion vectors between the specified frames; means for detecting motion vectors between .[.adjacent.]. .Iadd.a .Iaddend.non-specified .[.frames.]. .Iadd.frame located .Iaddend.between the specified frames .Iadd.and the specified frames .Iaddend.as differences with respect to said motion vectors between the specified frames. - View Dependent Claims (4)
- the improvement comprising;
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5. An inter-frame predictive encoding system comprising:
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means for setting reference frames separated at equal intervals, the reference frames being selected from successively inputted frames of a video signal; first encoding means for encoding each of the reference frames; means for generating a prediction signal for a dependent frame between the reference frames on the basis of a signal of the reference frames which precede and follow the dependent frame respectively; means for generating a prediction error representing a difference between the prediction signal and a signal of the dependent frame corresponding thereto; second encoding means for encoding said prediction error; and means for outputting and transmitting encoded data which are generated by the encoding in the first encoding means and the second encoding means. .Iadd.
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7. dependent frame. .Iaddend. .Iadd.15. The method in accordance with claim 14 wherein said weighted values are generated by multiplying said display information for said two reference frames by weighting coefficients selected such that the reference frame temporally closer to the dependent frame is given a greater weight. .Iaddend. .Iadd.16. The method in accordance with claim 13, wherein step (b) includes the steps of;
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calculating motion vectors representative of image movement between said two reference frames; and calculating motion-compensated predicted display information for each of said dependent frames located between said two frames from said motion vectors and the display information of said two reference frames. .Iaddend.
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Specification