Data transmission method and data transmission system

A universal serial bus (USB) reception device, comprising:

• a first interface configured to receive display port (DP) data via N/M lanes at a first link rate, wherein M is an integer greater than 1, and wherein N is an integer greater than 1;
• a switching re-timer including
• a plurality of de-serializer circuits configured to de-serialize the received DP data,
• a plurality of decoder circuits configured to decode the de-serialized DP data,
• a plurality of de-multiplexer circuits configured to demultiplex the decoded de-serialized DP data received via each of the N/M lanes into N lanes,
• a plurality of encoder circuits configured to encode the demultiplexed DP data, and
• a plurality of serializer circuits configured to serialize the encoded demultiplexed DP data and output the serialized demultiplexed DP data on each of the N lanes at a second link rate, wherein the second link rate is equal to the first link rate divided by M.

A data transmission system comprising:

• a universal serial bus (USB) transmission device, comprising:
• a first interface configured to receive display port (DP) data via N lanes at a first link rate, wherein N is an integer greater than 1;
• a first switching re-timer including
• a plurality of first de-serializer circuits configured to de-serialize the received DP data,
• a plurality of first decoder circuits configured to decode the de-serialized DP data,
• a plurality of multiplexer circuits configured to multiplex the decoded de-serialized DP data received via each of the N lanes into 1/M lanes, wherein M is an integer greater than 1,
• a plurality of first encoder circuits configured to encode the multiplexed DP data, and
• a plurality of first serializer circuits configured to serialize the encoded multiplexed DP data and output the serialized multiplexed DP data on each of the N/M lanes at a second link rate, wherein the second link rate is equal to the first link rate multiplied by M;
• and
• a USB reception device, comprising:
• a second interface configured to receive the DP data output from the USB transmission device on N/M lanes at the second link rate;
• a second switching re-timer including
• a plurality of second de-serializer circuits configured to de-serialize the received DP data,
• a plurality of second decoder circuits configured to decode the de-serialized DP data,
• a plurality of de-multiplexer circuits configured to demultiplex the decoded de-serialized DP data received via each of the N/M lanes into N lanes,
• a plurality of second encoder circuits configured to encode the demultiplexed DP data, and
• a plurality of second serializer circuits configured to serialize the encoded demultiplexed DP data and output the serialized demultiplexed DP data on each of the N lanes at the first link rate.