Multi-Channel Signal Transmission via Adaptive Lane Multiplexing
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Solution Overview
Problem
MHL technology's high transmission frequency creates issues in certain video resolutions, such as 1080p YCbCr mode, where the data transmission frequency may be excessively high for a transmission link, and existing methods do not efficiently support multi-channel data transmission at reduced clock frequencies.
Innovation Solution
A method and system that automatically detect the type of content data and select appropriate channels and clock frequencies to transmit data at a reduced frequency, such as using 2-to-1 lane multiplexing instead of 3-to-1 lane multiplexing, by modifying data to fit within a single output channel, allowing for transmission at a doubled clock frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If MHL technology uses a transmission clock frequency three times higher than general HDMI data transmission, then multi-channel data can be transmitted through a single channel, but the data transmission frequency becomes excessively high for certain video resolutions like 1080p YCbCr mode
Solution Approach 1:
The system dynamically selects between different transmission modes (3-to-1 lane multiplexing at high frequency or 2-to-1 lane multiplexing at reduced frequency) based on the detected video resolution and content type. This allows the transmission parameters to adapt to different operational conditions, resolving the contradiction between maintaining high data capacity and avoiding excessively high frequencies for certain resolutions
Solution Approach 2:
The patent changes the transmission parameters (clock frequency and lane multiplexing ratio) based on the video resolution being transmitted. For 1080p YCbCr mode and other specified resolutions, the system switches to 2-to-1 lane multiplexing with a doubled clock frequency instead of the standard 3-to-1 multiplexing with tripled frequency, thereby maintaining data integrity while reducing the transmission frequency to acceptable levels
2Adaptability or versatility
If 3-to-1 lane multiplexing is used to transmit three channel TMDS signals through one channel, then data transmission is achieved, but the high transmission frequency creates issues in certain implementations
Solution Approach 1:
The system dynamically adjusts the multiplexing ratio based on the video content and resolution being transmitted. By detecting the video mode and automatically selecting between 3-to-1 and 2-to-1 lane multiplexing, the system maintains reliable transmission across different resolutions while preserving multi-channel data transmission capability
Solution Approach 2:
The patent modifies the transmission parameters by switching between different multiplexing schemes (3-to-1 vs. 2-to-1 lane multiplexing) depending on the video resolution. This parameter change allows the system to maintain transmission reliability for resolutions like 1080p YCbCr where 3-to-1 multiplexing would create excessive frequency issues
Data Source
AI summary
Embodiments of the invention are generally directed to transmission and detection of multi-channel signals in reduced channel format. An embodiment of a method for transmitting data includes determining whether a first type or a second type of content data is to be transmitted, where the first type of content data is to be transmitted at a first multiple of a base frequency and the second type of data is to be transmitted at a second multiple of the base frequency. The method further includes selecting one or more channels from a plurality of channels based on the type of content data, clocking a frequency on the first or second multiple of the base frequency according to the type of content data in the selected channels, modifying the content data to fit within a single output channel, and transmitting the modified data via a single output channel at the chosen multiple of the base frequency.