Bus for high definition multimedia interface

A bus for the high definition multimedia interface (HDMI) is disclosed. The bus comprises a plurality of transmission lines and two clad layers. The conductive lines comprise a plurality of mutually twisted conductor lines arranged in a flat shape. The clad layers are disposed on two opposite surfaces of the twisted conductor lines sandwiching the transmission lines in-between. Since the transmission line sets are arranged in a juxtaposed structure, the bus can be easily bent for routing and coupling to reduce the installation space, streamline the manufacturing process, and reduce the overall manufacturing cost. Furthermore, a continuous extended shield can be used to penetrate or surround a cord set comprised of a group of transmission. Furthermore, the transmission lines may be covered to shield the cord set to protect the signal from external electromagnetic wave interference between the cord sets during the high frequency transmission.