| 摘要 |
PURPOSE:To improve the talking quality among three parties by checking the collision state of transmission and the magnitude of an input level to output a stable talking level among three parties at all times. CONSTITUTION:When an inputted data is close to a zero level, a digital processing unit 201 discriminates it that no talking is conducted and its data is stored in a built-in memory, and when the level is over the zero level, it is discriminated that the talking is under processing and its level is stored in the built-in memory. Then the unit 201 reads the content of the memory and adds the contents linearly. When the unit 201 reads the content of the memory and when any two or three of the levels a, b, c of the takers A, B, C are over the zero level, the unit 201 discriminates it that the calls collids with + or -each other, a 3dB or 6dB or, for example, attenuation is given to the talking to output a data of a linear level code. |
