Television – Bandwidth reduction system – Data rate reduction
Patent
1992-06-09
1994-08-16
Britton, Howard W.
Television
Bandwidth reduction system
Data rate reduction
358312, 358335, H04N 7133, H04N 592
Patent
active
053391080
ABSTRACT:
Editing of information recovered from a relatively high speed communications medium such as a communications channel or magnetic tape often times allows only a portion of the information to be recovered. Storing information in complete segments from which portions of an image, called "snatches," may be recovered helps. An image signal is compressed in such a way that a snatch can be used during decompression to reconstruct a recognizable image from less than all the information that defines the image-thereby giving rise to the notion of a partially reconstructed image. The image information comprises several pixel data blocks with each block including sufficient pixel image data to reconstruct a portion of the image. The pixel data blocks are discrete cosine transformed ("dct") to generate a set of dct coefficient blocks. The dct coefficients for a group of dct coefficient blocks are rank ordered from highest visibility coefficient (corresponding to lowest dct frequency coefficient) to lowest visibility coefficient (corresponding to highest dct frequency coefficient), and then are quantized, entropy encoded, and formatted together with synchronization information and parity checks from the error correction encoding before being transmitted on a channel or recorded on magnetic tape. A decompression and reconstruction arrangement functions essentially as the inverse of the compression arrangement. It is during the decompression that snatches are retrieved and used to reconstruct a partial (video) image by using some but not necessarily all the dct coefficients that define the image.
REFERENCES:
patent: 3795763 (1974-03-01), Golding et al.
patent: 3803348 (1974-04-01), Limb et al.
patent: 4023199 (1977-05-01), Netravali et al.
patent: 4025950 (1977-05-01), Matsumoto et al.
patent: 4068258 (1978-01-01), Bied-Charreton
patent: 4175270 (1979-11-01), Zenzefilis
patent: 4204227 (1980-05-01), Gurley
patent: 4302775 (1981-11-01), Widergren
patent: 4383272 (1983-05-01), Netravali et al.
patent: 4394774 (1983-07-01), Widergren et al.
patent: 4494144 (1985-01-01), Brown
patent: 4504860 (1985-03-01), Nicol et al.
patent: 4541012 (1985-09-01), Tescher
patent: 4580134 (1986-04-01), Campbell et al.
patent: 4626829 (1986-12-01), Hauck
patent: 4654696 (1987-03-01), Dayton et al.
patent: 4672467 (1987-06-01), Heitmann
patent: 4679094 (1987-07-01), Rutherford et al.
patent: 4682248 (1987-07-01), Schwartz
patent: 4698694 (1987-10-01), Tomita et al.
patent: 4740832 (1988-04-01), Sprague et al.
patent: 4743960 (1988-05-01), Duvic et al.
patent: 4758881 (1988-07-01), Laspada
patent: 4764805 (1988-08-01), Rabbani et al.
patent: 4768082 (1988-08-01), Hiratsuka et al.
patent: 4774562 (1988-09-01), Chen et al.
patent: 4775897 (1988-10-01), Umemoto et al.
patent: 4783841 (1988-11-01), Crayson
patent: 4797741 (1989-01-01), Sato et al.
patent: 4802003 (1989-01-01), Takei et al.
patent: 4821119 (1989-04-01), Gharavi
patent: 4847677 (1989-07-01), Music et al.
patent: 4849807 (1989-07-01), Music et al.
patent: 4857991 (1989-08-01), Music et al.
patent: 4862167 (1989-08-01), Copeland, III
patent: 4868653 (1989-09-01), Golin et al.
patent: 4974078 (1990-11-01), Tsai
patent: 5001561 (1991-03-01), Haskell et al.
patent: 5006931 (1991-04-01), Shirota
patent: 5136391 (1992-08-01), Minami
patent: 5196933 (1993-03-01), Henot
patent: 5231487 (1993-07-01), Hurley
patent: 5239308 (1993-08-01), Keesen
Stefhano Tubaro, "A Two Layers Video Coding Scheme for ATM Networks", Signals Processing; Image Communications, vol. 3, No. 2/3, (Jun. 1991), pp. 129-141.
C. Yamamitsu et al., "A Study On Trick Plays For Digital VCR", IEEE 1991 International Conference on Consumer Electronics, Digest of Technical Papers, (Jun. 1991), pp. 184-185.
Herbert Lohscheller, "A Subjectively Adapted Image Communication System", IEEE Transactions on Communications, COM. 32, No. 12, (Dec. 1984), New York, pp. 1316-1322.
Chen et al., "Scene Adaptive Coder", IEEE Transations on Communications, vol. COM-32, Mar. 1984, pp. 225-232.
Yamamitsu et al., "An Experimental Digital VTR Capable of 12-Hours Recording", IEEE Transactions on Consumer Electronics, vol. CE-33, No. 3, Aug. 1987, pp. 240-248.
Yamamitsu et al., "A Study on Trick Plays for Digital VCR", IEEE Transactions on Consumer Electronics, vol. 37, No. 3, Aug. 1991, pp. 261-266.
Onishi et al., "An Experimental Home-Use Digital VCR with Three Dimensional DCT and Superimposed Error Correction Coding", IEEE Transactions on Consumer Electronics, vol. 37, No. 3, Aug. 1991, pp. 252-260.
Yeneda et al., "An Experimental Digital VCR with New DCT-Based Bit-Rate Reduction System", IEEE Transactions on Consumer Electronics, vol. 37, No. 3, Aug. 1991, pp. 275-282.
Yamamitsu et al., "An Experimental Study for a Home-Use Digital VTR", IEEE Transactions on Consumer Electronics vol. 35, No. 3, Aug. 1989, pp. 450-457.
Yoneda et al., "An Experimental Digital VCR with New DCT-Based Bit-Rate Reduction System", IEEE Transactions on Consumer Electronics, vol. 37, No. 3, Aug. 1991, pp. 275-282.
Kim et al., "Bit Rate Reduction Algorithm for a Digital VCR", IEEE Transactions on Consumer Electronics, vol. 37, No. 3, Aug. 1991, pp. 267-274.
Ahmed et al., "Discrete Cosine Transform", IEEE Transactions on Computers, vol. C-23, No. 1, Jan. 1974, pp. 90-93.
Coleman Charles H.
Miller Sidney D.
Smidth Peter
Ampex Corporation
Britton Howard W.
Mesaros John G.
LandOfFree
Ordering and formatting coded image data and reconstructing part does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ordering and formatting coded image data and reconstructing part, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ordering and formatting coded image data and reconstructing part will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-955953