| 摘要 |
HIGH EFFICIENCY CODING APPARATUS In 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 minimum value is subtracted from each of the digital data to generate modified digital video data. The distribution table of the dynamic range information during 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 the encoding bit number and transmitted with a first additional code per block formed of the minimum value and a signed-based on the dynamic range information and a second additional code for the predetermined period. |
