Television – Bandwidth reduction system – Data rate reduction
Patent
1994-06-07
1995-12-26
Kostak, Victor R.
Television
Bandwidth reduction system
Data rate reduction
348716, H04N 712
Patent
active
054792100
ABSTRACT:
A video image processing system comprises an input cache store for temporarily storing input video data, compressors for compressing image data from the input store and an output store comprising multiple storage areas of known fixed size for storing respective files of compressed data from the compressors. The compressors are arranged to compress each image of the input video data to a given initial degree to produce respective data files. A processor compares the number of bytes in each data file with the known size of one storage area in the output store to determine whether the data file will occupy a predetermined proportion of said storage area. In the event that the data file will not occupy said predetermined portion of said storage area, the processor causes one of the compressors to effect one or more repeat compressions to a different degree in order to produce a data file of a size which will occupy said predetermined proportion of said storage. The system thereby optimises the compression of data and the utilisation of storage in the storing of the compressed data.
REFERENCES:
patent: 5028999 (1991-07-01), Vogel
patent: 5079630 (1992-06-01), Golin et al.
Je H. Lee et al., A Study on New DCT-Based Bit Rate Reduction Algorithm and Variable Speed Playback for a Home-Use Digital VCR, Aug. 1992, IEEE Transactions on Consumer Electronics, vol. 58, No. 3, pp. 236-241.
D. Reininger et al., Statistical Multiplexing of VBR MPEG Compressed Video on ATM Networks, IEEE Computer Society Press, Mar. 28, 1993, pp. 919-926 English-language Abstract of European Patent Document No. 0347330, Derwent World Patent Index.
Brown Ian M.
Cawley Robin A.
Stapleton Alan L.
Kostak Victor R.
Quantel Ltd.
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