MULTILEVEL SIGNAL TRANSMISSION SYSTEM CAPABLE OF TRANSMITTING MULTILEVEL DATA SIGNAL WITHOUT SIGNAL DISTORTION AND CORRECTLY DETERMINING VOLTAGE LEVEL

摘要

A multilevel signal transmitting apparatus determines a voltage level indicating an original data signal, and generates a multilevel data signal including a plurality of unit time intervals each having the determined voltage level. The multilevel signal transmitting apparatus assigns an even number of voltage levels to each unit time interval, assigns a smaller number of voltage levels than a maximum number of voltage levels, to a unit time interval next to a unit time interval to which the maximum number of voltage levels are assigned, and determines one of the assigned voltage levels, as the voltage level indicating the original data signal. A multilevel signal receiving apparatus detects the voltage level of the multilevel data signal, and reproduces the original data signal, based on the assigned voltage levels and the detected voltage level.

主权项

1. A multilevel signal transmitting apparatus for generating a multilevel data signal from an original data signal, the multilevel data signal having an even number of voltage levels equal to or more than four,
wherein the multilevel signal transmitting apparatus comprises: a data processing circuit configured to determine the voltage level indicative of the original data signal, in each of unit time intervals, and a driver circuit configured to generate the multilevel data signal including a plurality of unit time intervals, each unit time interval having the determined voltage level, wherein the data processing circuit is configured to: assign a predetermined even number of voltage levels to each of the unit time intervals, assign a smaller number of voltage levels than a maximum number of voltage levels, to a unit time interval next to a unit time interval to which the maximum number of voltage levels are assigned, and determine one of the assigned voltage levels, as the voltage level indicative of the original data signal, in each of the unit time intervals, wherein the driver circuit is configured to generate the multilevel data signal, such that a maximum of absolute values of the voltage levels assigned to the unit time interval, to which the smaller number of voltage levels than the maximum number of voltage levels are assigned, is smaller than a maximum of absolute values of the voltage levels assigned to the unit time interval, to which the maximum number of voltage levels are assigned.