Method for performing consumer electronics control communication with remote device having high-definition multimedia interface port with aid of multiple virtual network blocks, and associated apparatus

A method for performing consumer electronics control (CEC) communication with a remote device having a high-definition multimedia interface (HDMI) port with aid of multiple virtual network blocks (VNBs), the method comprising:

• utilizing a first VNB among the multiple VNBs to receive a first message from a first device through a first CEC line, wherein the first message conforms to a predetermined frame format;
• utilizing the first VNB to convert the first message into a first packet, for performing cross-CEC-line transmission;
• utilizing the first VNB to transmit the first packet to a second VNB among the multiple VNBs, wherein the first packet is transmitted directly or indirectly from the first VNB to the second VNB;
• utilizing the second VNB to convert the first packet into a second message, wherein the second message conforms to the predetermined frame format;
• and
• utilizing the second VNB to transmit the second message to the remote device through a second CEC line, to allow the first device to indirectly perform the CEC communication with the remote device via the cross-CEC-line transmission.