Importance

Loading Importance Indicators...

Abstract

In a highly efficient coding apparatus, for coding digital video data in a block format and allowing video data compression for transmission using a data transmitter having a predetermined transmission capacity; maximum and minimum values of the digital video data of plural picture elements in a block are detected, the digital video data having values between the maximum value and a first value which is a first predetermined level lower than the maximum value are averaged for generating a modified maximum value, the digital video data having values between the minimum value and a second predetermined level higher than the minimum value are averaged for generating a modified minimum value, the modified minimum value is subtracted from the digital video data for each of the picture elements to generate modified digital video data, modified dynamic range information is generated from the modified maximum and minimum values, an encoding bit number is determined for each block during a predetermined period from the predetermined transmission capacity of the data transmitter, the modified digital video data is subjected to edge-match encoding with the encoding bit number, and an output of the encoder, a first additional code for each block formed of at least two of the modified maximum and minimum values and a signal based on the modified dynamic range information, and a second additional code for each predetermined period referred to above are transmitted.

Loading the Abstract Image...

First Claim