NEC IR Protocol MSB is indicated in the former
Device address code 0x80

The command code values are as follows:
Function: NEC code value
IR_CMD_CH_VGA	       0x07
IR_CMD_CH_HDMI1	     0x09
IR_CMD_CH_HDMI2	     0x0A
IR_CMD_CH_HDMI3	     0x1F
IR_CMD_CH_AV2	       0x03
IR_CMD_CH_AV1	       0x01
IR_CMD_CH_YPBPR2	   0x06
IR_CMD_CH_YPBPR1	   0x04
IR_CMD_STANDBY	     0x1A

Some manufacturers may describe it in terms of four bytes, for example, as follows:

IR_CMD_CH_VGA  ：    0x807F07F8