| 摘要 |
PURPOSE:To minimize the deterioration of video quality due to compression, by compressing the combination of codes for 2 video elements' share of an intermediate tone signal in which one video element is represented with one tone out of a plurality of tones into a fixed length code shorter than the code length for two video elements' share. CONSTITUTION:An intermediate tone video signal read-in from an original is written in a random access memory 3 with a read-in circuit 1. The data from the random access memory 3 is transmitted to a code conversion circuit 4 and a microcomputer 5. The data in 8-bit inputted to the code conversion circuit 4 is compressed into data in 7-bit under the control of the microcomputer 5, inputted to a shift register 7, and a data in 7-bit is transmitted to a BCH processing circuit from the shift register 7 as a transmission data SD. In a code conversion circuit 4, the combination of codes for two video elements' share of intermediate tone signals in which one video element is represented with one tone out of a plurality of tones, is compressed into a fixed code length shorter than the code length for two video elements' share. |
