Television – Bandwidth reduction system – Data rate reduction
Patent
1996-05-23
1999-12-28
Jastrzab, Jeffrey R.
Television
Bandwidth reduction system
Data rate reduction
348699, H04N 712
Patent
active
060088516
ABSTRACT:
Data compression of a sequence of digital frames is achieved by periodic sampling of the frames to form a sequence of "milestone frames". Each frame between the milestone frames is partitioned into a set of subarrays or fragments that cover the frame. Each fragment is projected one frame forward or backward, depending on the direction of tracking, and then displaced to a position yielding the closest match in the adjacent frame. The data available for transmission or storage is comprised of: a) compressed encoding of the milestone frames; and b) the displacements of the fragments from either adjacent frame. Unique to this invention is the construction of a motion trajectory at each pixel of each frame and the reconstruction of the intensity values of the pixels in those frames that are not milestone frames. The construction of motion trajectories is achieved by finding sequences of connected displacements of fragments. The reconstruction of the intensity values is achieved by interpolation of the pixel values along motion trajectories between pairs of successive milestone frames. Some pixels in nonmilestone frames may not lie on a computed trajectory. These pixels are reconstructed by iterative spatial interpolation of previously reconstructed neighboring pixels. Trade-offs among the delay of reconstruction and the spatial image quality can be achieved by varying the time between successive milestone frames, the number of frames per second, the size of each fragment, and the size of each frame.
REFERENCES:
patent: 5173772 (1992-12-01), Choi
patent: 5247586 (1993-09-01), Gobert et al.
patent: 5267332 (1993-11-01), Normille et al.
patent: 5394196 (1995-02-01), Robert
patent: 5486863 (1996-01-01), Anyeung et al.
patent: 5561475 (1996-10-01), Jung
patent: 5619268 (1997-04-01), Kobayashi et al.
patent: 5627591 (1997-05-01), Lee
patent: 5646691 (1997-07-01), Yokoyama
Sklansky Jack
Vendrovsky Eugene
Dawes Daniel L.
Din Luanne P.
Jastrzab Jeffrey R.
The Regents of the University of California
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