Patent ID: 8281207
Filing Date: 2012-10-02
Classification: H03M

Abstract:
1. Data transmission equipment converting transmission data, which comprises data and control information, to serial bit string data and transmitting the converted data, the data transmission equipment comprising a transmitter and a receiver connected to each other by a transmission path, wherein the transmitter includes: a scrambler unit which ensures a DC balance by scrambling data so that a running disparity of 0s and 1s of input data is substantially even; a bit-string converting unit which adds bit data, which ensures a maximum run length of a serial bit string of scrambled data, and converts control information to bit data of a certain fixed value; a synchronization timing generating unit which divides transmission data by a constant interval and converts the transmission data to a data block; and a check-bit calculating and adding unit which calculates check data for an error correction with respect to the data block and adds the check data to part of the data block, and the receiver includes: an error-bit calculating/correcting unit which receives the data block, and carries out an error check and an error correction based on the check bits added to the data block; a bit-string converting unit which extracts a fixed-value bit pattern of the control data from the bit string of the data block, converts the bit pattern to control information, and discriminates the data and the control information; and a descrambler unit which reconverts data-scrambled data to data before scrambling, wherein the transmission data to be input to the transmitter includes: an 8-bit bit data string; and a control bit indicating that the 8-bit data is either the data or the control information, the scrambler unit, if the transmission data is the data, scrambles the data so that a running disparity of 0s and 1s of the 8-bit bit data string is even or substantially even and obtains the result as an 8-bit bit pattern, the bit-string converting unit adds: a value of 1 if the number of bits whose value is 1 is 0 to 3 in the 8-bit bit pattern; a value of 0 if the number is 5 to 8; and 1-bit data that indicates an inverted value of an immediately previous bit in a serial bit string if the number is 4 so as to convert to a 9-bit bit pattern, thereby ensuring the DC balance and the maximum run length of ensured contiguous bit data, and, if the transmission data is the control data, the bit-string converting unit converts to a 10-bit fixed bit pattern corresponding to a value represented by the 8-bit data string, thereby ensuring the DC balance and the maximum run length of the contiguous bit data.