PAM-N Modulation Reduces HDMI Cable Wire Count
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current signal transmission methods require multiple metal wires for HDMI/DP cables, leading to increased cable diameter and manufacturing costs due to rising signal rates and lengths.
Innovation Solution
A signal sending module that uses PAM-N modulation to reduce the number of signal channels, incorporating a signal parameter determining module to adjust modulation modes based on channel and symbol rate, and error correction to pack signals efficiently, thereby reducing the number of wires needed for transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple metal wires are used for signal transmission, then transmission efficiency is improved, but cable diameter and manufacturing cost increase
Solution Approach 1:
The patent combines multiple signal channels into a single transmission medium by using PAM-N modulation to encode multiple channels' worth of data into one channel, thereby reducing the number of wires needed while maintaining transmission efficiency
Solution Approach 2:
The patent changes the signal transmission parameter by implementing PAM-N modulation (where N > 2), which allows each signal level to represent multiple bits of information, thereby reducing the number of physical wires required for transmission
2Productivity
If multiple metal wires are used for signal transmission, then transmission efficiency is improved, but manufacturing cost increases
Solution Approach 1:
The patent merges multiple signal channels into one transmission channel using PAM-N modulation, reducing the number of wires required and thereby lowering manufacturing costs while preserving transmission efficiency
Solution Approach 2:
By changing the modulation parameter to PAM-N (N > 2), the system achieves higher data rates per wire, reducing the total wire count and associated manufacturing costs
3Speed
If signal rate and cable length increase, then transmission capability is improved, but manufacturing cost rises sharply
Solution Approach 1:
The patent implements PAM-N modulation with N > 2, which allows the system to achieve higher signal rates and longer cable lengths with fewer wires, thereby reducing manufacturing costs despite increased transmission demands
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach decreases the number of wires required for signal transmission, lowering the transmission cost while maintaining signal integrity and adaptability to changing signal conditions.
Implementation Method 1
a PAM-N modulation module connected to the first signal parameter determining module and configured to perform PAM-N modulation processing on the first signal to output a second signal
Data Source
AI summary
The disclosure discloses a signal sending method, a receiving method, a transmitting method and a related product, in particular to a signal sending module, a signal transmission device, a signal receiving module, a signal sending method, a receiving method and a transmitting method. The signal sending module comprises: a first signal parameter determining module, configured to connect a source, for receiving a first signal to determine a first number of first signal channels and a first symbol rate; wherein, the first number of first signal channels is the quantity of channels used by the source to provide the first signal; and a PAM-N modulation module performing PAM-N modulation processing on the first signal, the quantity of signal channels of a second signal output by the PAM-N modulation module is less than or equal to the first number of first signal channels, thus reduce a number of wires of cables.