| 摘要 |
PURPOSE:To reduce the number of bits required for the discrimination of a break point and to simplify the cnstitution of hardware, by setting up the break point value for break line compression so as to satisfy some conditions. CONSTITUTION:When a 10-bit data is converted into an 8-bit data, the value of the 1st break point can be optionally set up, but the lower bit is determined so as not to be set to ''1''; in the figure, ''8'' is adopted. In the 8-bit pattern, ''1'' is not set to the lower three bits as shown in the table. Therefore, a value in which ''1'' is not set to the lower three bits is selected as the value of the 2nd break point and ''80'' is adopted in this case. As the value of the 3rd break point, ''320'' in which ''1'' is not set to the lower three bits is adopted in the same manner. By selecting the values of the break points like said procedure, the number of bits required for the discrimination of the break points is reduced and the hardware constitution of the signal converting circuit is simplified. |
