High efficiency coding apparatus
Patent 4722003 Issued on January 26, 1988. Estimated Expiration Date: 
November 19, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 19, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesAdaptive type compression method for compressing a color image by imparting predetermined variable-length codes to combinations of quantized values based upon quantized prediction error components System for re-quantization of coded picture signals Patent #: 4677479 InventorAssigneeApplicationNo. 06/932274 filed on 11/19/1986US Classes:375/240.24, Block coding375/244DifferentialExaminersPrimary: Britton, Howard W.Attorney, Agent or FirmInternational ClassH04N 7/26 (20060101)Foreign Application Priority Data1985-11-29 JPAbstractIn an apparatus for coding digital video data in a block format, the dynamic range information is generated from maximum and minimum values of plural picture elements in a block, and the minimum value is subtracted from each of the digital data to generate modified digital video data. A distribution table of the dynamic range information during a predetermined period, such as plural fields, is generated, and the encoding bit number for each block is determined based on the distribution table and the capacity of the transmission line such as a VTR. The modified data is encoded with such encoding bit number and transmitted with a first additional code per block formed of the minimum value and a signal based on the dynamic range information and with a second additional code for the predetermined period. | |
