Trellis coded modulation method for reducing inter-cell interference of flash memory device, trellis coded modulation circuit, error correct circuit and flash memory device using same

摘要

PURPOSE: A trellis coded modulation method, a trellis coded modulation circuit, an error correcting circuit, a method for inputting data of a flash memory device and the flash memory device are provided to minimize interference between cells by decreasing an error rate due to an E-PH pattern. CONSTITUTION: A convolutional encoder(11) receives the first input data of k bits among input data of n bits. The k is smaller than the n. The convolutional encoder outputs the encoded input data of k+r bits by adding the surplus data of r bits to the first input data of k bits. An m dimensional modulator(12) rearranges m modulation data on an m dimensional trellis point by receiving the encoded input data of k+r bits and the second input data of the n-k bits except the first input data. The m dimensional modulator stores the m modulation data in m memory cells of a flash memory device by corresponding to the rearranged trellis point.