A transceiver device (TSCV) comprising: a transmitter (TXD) and a receiver (RXD) connected to each other through a first line (dp1r) and a second line (dn1r), wherein a first frame period includes an active period (ACTP) in which a first payload (ePayload) is transmitted from the transmitter (TXD) to the receiver (RXD) and a vertical blank period (BP) including a frequency hopping period (FHP) in which a data transmission speed between the transmitter (TXD) and the receiver (RXD) is variable, wherein the transmitter (TXD) transmits signals having a first voltage range (vr1) to the first line (dp1r) and the second line (dn1r) in a first mode (mode1), and transmits signals having a second voltage range (vr2) less than the first voltage range (vr1) to the first line (dp1r) and the second line (dn1r) in a second mode (mode2), wherein the transmitter (TXD) generates a first horizontal synchronization signal in the second mode (mode2) in a period except for the frequency hopping period (FHP) of the vertical blank period (BP), encodes the first horizontal synchronization signal to horizontal synchronization data (Hsync_M2'), and generates a second horizontal synchronization signal in the first mode (mode1) in the frequency hopping period (FHP), and wherein the transmitter (TXD) adds a first clock training pattern (CLK-T1) to the horizontal synchronization data (Hsync_M2') in the period except for the frequency hopping period (FHP) of the vertical blank period (BP), and adds a second clock training pattern (CLK-T2) different from the first clock training pattern (CLK-T1) to the horizontal synchronization data (Hsync_M2') after the frequency hopping period (FHP) is ended. a transmitter (TXD) and a receiver (RXD) connected to each other through a first line (dp1r) and a second line (dn1r), wherein a first frame period includes an active period (ACTP) in which a first payload (ePayload) is transmitted from the transmitter (TXD) to the receiver (RXD) and a vertical blank period (BP) including a frequency hopping period (FHP) in which a data transmission speed between the transmitter (TXD) and the receiver (RXD) is variable, wherein the transmitter (TXD) transmits signals having a first voltage range (vr1) to the first line (dp1r) and the second line (dn1r) in a first mode (mode1), and transmits signals having a second voltage range (vr2) less than the first voltage range (vr1) to the first line (dp1r) and the second line (dn1r) in a second mode (mode2), wherein the transmitter (TXD) generates a first horizontal synchronization signal in the second mode (mode2) in a period except for the frequency hopping period (FHP) of the vertical blank period (BP), encodes the first horizontal synchronization signal to horizontal synchronization data (Hsync_M2'), and generates a second horizontal synchronization signal in the first mode (mode1) in the frequency hopping period (FHP), and wherein the transmitter (TXD) adds a first clock training pattern (CLK-T1) to the horizontal synchronization data (Hsync_M2') in the period except for the frequency hopping period (FHP) of the vertical blank period (BP), and adds a second clock training pattern (CLK-T2) different from the first clock training pattern (CLK-T1) to the horizontal synchronization data (Hsync_M2') after the frequency hopping period (FHP) is ended. <EOS>