HYBRID VIDEO CODING SUPPORTING INTERMEDIATE VIEW SYNTHESIS
First Claim
1. Hybrid video decoder supporting intermediate view synthesis of an intermediate view video from a first- and a second-view video which are predictively coded into a multi-view data signal with frames of the second-view video being spatially subdivided into sub-regions and the multi-view data signal comprising a prediction mode out of a set of possible prediction modes, associated with each of the sub-regions, wherein the set of possible prediction modes comprises at least an inter-view prediction mode and an intra-view prediction mode, the hybrid video decoder comprising:
- an extractor configured to respectively extract, from the multi-view data signal, for sub-regions of the frames of the second-view video with which the inter-view prediction mode is associated, a disparity vector and a prediction residual;
a predictive reconstructor configured to reconstruct the sub-regions of the frames of the second-view video with which the inter-view prediction mode is associated, by generating a prediction from a reconstructed version of a portion of frames of the first-view video using the disparity vectors extracted from the multi-view data signals for the respective sub-regions, and the prediction residual for the respective sub-regions; and
an intermediate view synthesizer configured to reconstruct first portions of the intermediate view video using the reconstructed version of the portions of the frames of the first-view video, and the disparity vectors extracted from the multi-view data signal,wherein the intermediate view synthesizer is configured to reconstruct fourth portions of the intermediate view video other than the first portions by temporally and/or spatially interpolating disparity vectors extracted from the multi-view data signal for the sub-regions of the frames of the second-view video with which the inter-view prediction mode is associated, to acquire disparity vectors for sub-regions with which the intra-view prediction mode is associated.
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Abstract
Hybrid video decoder supporting intermediate view synthesis of an intermediate view video from a first- and a second-view video which are predictively coded into a multi-view data signal with frames of the second-view video being spatially subdivided into sub-regions and the multi-view data signal having a prediction mode is provided, having: an extractor configured to respectively extract, from the multi-view data signal, for sub-regions of the frames of the second-view video, a disparity vector and a prediction residual; a predictive reconstructor configured to reconstruct the sub-regions of the frames of the second-view video, by generating a prediction from a reconstructed version of a portion of frames of the first-view video using the disparity vectors and a prediction residual for the respective sub-regions; and an intermediate view synthesizer configured to reconstruct first portions of the intermediate view video.
59 Citations
12 Claims
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1. Hybrid video decoder supporting intermediate view synthesis of an intermediate view video from a first- and a second-view video which are predictively coded into a multi-view data signal with frames of the second-view video being spatially subdivided into sub-regions and the multi-view data signal comprising a prediction mode out of a set of possible prediction modes, associated with each of the sub-regions, wherein the set of possible prediction modes comprises at least an inter-view prediction mode and an intra-view prediction mode, the hybrid video decoder comprising:
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an extractor configured to respectively extract, from the multi-view data signal, for sub-regions of the frames of the second-view video with which the inter-view prediction mode is associated, a disparity vector and a prediction residual; a predictive reconstructor configured to reconstruct the sub-regions of the frames of the second-view video with which the inter-view prediction mode is associated, by generating a prediction from a reconstructed version of a portion of frames of the first-view video using the disparity vectors extracted from the multi-view data signals for the respective sub-regions, and the prediction residual for the respective sub-regions; and an intermediate view synthesizer configured to reconstruct first portions of the intermediate view video using the reconstructed version of the portions of the frames of the first-view video, and the disparity vectors extracted from the multi-view data signal, wherein the intermediate view synthesizer is configured to reconstruct fourth portions of the intermediate view video other than the first portions by temporally and/or spatially interpolating disparity vectors extracted from the multi-view data signal for the sub-regions of the frames of the second-view video with which the inter-view prediction mode is associated, to acquire disparity vectors for sub-regions with which the intra-view prediction mode is associated. - View Dependent Claims (2, 3, 4, 5, 6)
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7. Hybrid video decoding method supporting intermediate view synthesis of an intermediate view video from a first- and a second-view video which are predictively coded into a multi-view data signal with frames of the second-view video being spatially subdivided into sub-regions and the multi-view data signal comprising a prediction mode out of a set of possible prediction modes, associated with each of the sub-regions, wherein the set of possible prediction modes comprises at least an inter-view prediction mode and an intra-view prediction mode, the hybrid video decoding method comprising:
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respectively extracting, from the multi-view data signal, for sub-regions of the frames of the second-view video with which the inter-view prediction mode is associated, a disparity vector and a prediction residual; predictively reconstructing the sub-regions of the frames of the second-view video with which the inter-view prediction mode is associated, by generating a prediction from a reconstructed version of a portion of frames of the first-view video using the disparity vectors extracted from the multi-view data signals for the respective sub-regions, and the prediction residual for the respective sub-regions; and reconstructing first portions of the intermediate view video using the reconstructed version of the portions of the frames of the first-view video, and the disparity vectors extracted from the multi-view data signal wherein the method further comprises reconstructing fourth portions of the intermediate view video other than the first portions by temporally and/or spatially interpolating disparity vectors extracted from the multi-view data signal for the sub-regions of the frames of the second-view video with which the inter-view prediction mode is associated, to acquire disparity vectors for sub-regions with which the intra-view prediction mode is associated.
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8. Multi-view data signal comprising a first- and a second-view video predictively coded therein with frames of the second-view video being spatially subdivided into sub-regions and the multi-view data signal comprising a prediction mode out of a set of possible prediction modes, associated with each of the sub-regions, wherein the set of possible prediction modes comprises at least an inter-view prediction mode and an intra-view prediction mode, the multi-view data signal comprising, for sub-regions of the frames of the second-view video with which the inter-view prediction mode is associated, a disparity vector, a prediction residual and reliability data, with the reliability data being determined in dependence on a function which monotonically increases with decreasing value of a dispersion measure of the distribution of a resulting prediction error at a set of disparity vectors when plotted against a distance of the respective one of the set of disparity vectors from the disparity vector inserted into the multi-view data signal.
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9. Hybrid video encoder for predictively encoding a first- and a second-view video into a multi-view data signal with frames of the second-view video being spatially subdivided into sub-regions, the hybrid video encoder being configured to
assign a prediction mode out of a set of possible prediction modes, to each of the sub-regions of the frames of the second-view video, wherein the set of possible prediction modes comprises at least an inter-view prediction mode and an intra-view prediction mode; -
respectively determine, for sub-regions of the frames of the second-view video with which the inter-view prediction mode is associated, a disparity vector among disparity vectors out of a set of disparity vectors lying within a predetermined search area, which correspond to a local minimum of a respective prediction error resulting from applying the respective disparity vector to a reconstructed version of a portion of frames of the first-view video, and the prediction residual for the respective sub-regions, resulting from applying the disparity vector determined; and respectively inserting, for sub-regions of the frames of the second-view video with which the inter-view prediction mode is associated, the disparity vector determined, the prediction residual determined, and reliability data into the multi-view data signal, with the reliability data being determined in dependence on a function which monotonically increases with decreasing value of a dispersion measure of the distribution of a resulting prediction error at the set of disparity vectors when plotted against a distance of the respective one of the set of disparity vectors from the disparity vector inserted into the multi-view data signal.
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10. Hybrid video encoding method for predictively encoding a first- and a second-view video into a multi-view data signal with frames of the second-view video being spatially subdivided into sub-regions, the hybrid video encoding method comprising
assigning a prediction mode out of a set of possible prediction modes, to each of the sub-regions of the frames of the second-view video, wherein the set of possible prediction modes comprises at least an inter-view prediction mode and an intra-view prediction mode; -
respectively determining, for sub-regions of the frames of the second-view video with which the inter-view prediction mode is associated, a disparity vector among disparity vectors out of a set of disparity vectors lying within a predetermined search area, which correspond to a local minimum of a respective prediction error resulting from applying the respective disparity vector to a reconstructed version of a portion of frames of the first-view video, and the prediction residual for the respective sub-regions, resulting from applying the disparity vector determined; and respectively inserting, for sub-regions of the frames of the second-view video with which the inter-view prediction mode is associated, the disparity vector determined, the prediction residual determined, and reliability data into the multi-view data signal, with the reliability data being determined in dependence on a function which monotonically increases with decreasing value of a dispersion measure of the distribution of a resulting prediction error at the set of disparity vectors when plotted against a distance of the respective one of the set of disparity vectors from the disparity vector inserted into the multi-view data signal.
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11. A non-transitory computer readable medium including a computer program comprising a program code for performing, when running on a computer, a hybrid video decoding method supporting intermediate view synthesis of an intermediate view video from a first- and a second-view video which are predictively coded into a multi-view data signal with frames of the second-view video being spatially subdivided into sub-regions and the multi-view data signal comprising a prediction mode out of a set of possible prediction modes, associated with each of the sub-regions, wherein the set of possible prediction modes comprises at least an inter-view prediction mode and an intra-view prediction mode, the hybrid video decoding method comprising:
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respectively extracting, from the multi-view data signal, for sub-regions of the frames of the second-view video with which the inter-view prediction mode is associated, a disparity vector and a prediction residual; predictively reconstructing the sub-regions of the frames of the second-view video with which the inter-view prediction mode is associated, by generating a prediction from a reconstructed version of a portion of frames of the first-view video using the disparity vectors extracted from the multi-view data signals for the respective sub-regions, and the prediction residual for the respective sub-regions; and reconstructing first portions of the intermediate view video using the reconstructed version of the portions of the frames of the first-view video, and the disparity vectors extracted from the multi-view data signal wherein the method further comprises reconstructing fourth portions of the intermediate view video other than the first portions by temporally and/or spatially interpolating disparity vectors extracted from the multi-view data signal for the sub-regions of the frames of the second-view video with which the inter-view prediction mode is associated, to acquire disparity vectors for sub-regions with which the intra-view prediction mode is associated.
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12. A non-transitory computer readable medium including a computer program comprising a program code for performing, when running on a computer, a hybrid video encoding method for predictively encoding a first- and a second-view video into a multi-view data signal with frames of the second-view video being spatially subdivided into sub-regions, the hybrid video encoding method comprising
assigning a prediction mode out of a set of possible prediction modes, to each of the sub-regions of the frames of the second-view video, wherein the set of possible prediction modes comprises at least an inter-view prediction mode and an intra-view prediction mode; -
respectively determining, for sub-regions of the frames of the second-view video with which the inter-view prediction mode is associated, a disparity vector among disparity vectors out of a set of disparity vectors lying within a predetermined search area, which correspond to a local minimum of a respective prediction error resulting from applying the respective disparity vector to a reconstructed version of a portion of frames of the first-view video, and the prediction residual for the respective sub-regions, resulting from applying the disparity vector determined; and respectively inserting, for sub-regions of the frames of the second-view video with which the inter-view prediction mode is associated, the disparity vector determined, the prediction residual determined, and reliability data into the multi-view data signal, with the reliability data being determined in dependence on a function which monotonically increases with decreasing value of a dispersion measure of the distribution of a resulting prediction error at the set of disparity vectors when plotted against a distance of the respective one of the set of disparity vectors from the disparity vector inserted into the multi-view data signal.
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Specification