HDMI ARC Firmware Update via Multiplexing
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Solution Overview
Problem
Consumer electronics devices without internet connectivity, such as soundbars, face challenges in firmware updates due to the lack of internet connection, leading to inefficient and unreliable manual processes like USB drive usage, which can result in device malfunction or 'bricking'.
Innovation Solution
Repurposing the HDMI ARC cable to transmit firmware update data to audio devices connected to a TV, using multiplexing techniques to combine audio and firmware data without interrupting the audio signal, allowing for simultaneous transmission and demultiplexing at the device level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual USB drive update process is used for soundbars without internet connectivity, then firmware updates can be performed, but the process is inefficient and unreliable requiring user intervention and risking device malfunction
Solution Approach 1:
The soundbar automatically receives and installs firmware updates through the HDMI ARC connection without requiring user intervention. The system self-manages the update process by automatically detecting available updates, transferring firmware data, and installing updates during idle periods, eliminating the need for manual USB drive operations.
Solution Approach 2:
The HDMI ARC connection serves as an intermediary channel between the TV and soundbar, enabling automatic firmware transfer. The TV acts as a relay, receiving firmware updates from the internet and automatically transmitting them to the soundbar through the existing audio return channel, bypassing the need for direct user-mediated USB updates.
2Reliability
If internet connectivity is added to soundbars for automatic updates, then update reliability improves, but device complexity and cost increase
Solution Approach 1:
The HDMI ARC connection, originally designed solely for audio transmission, is repurposed to also carry firmware update data. This multi-functional use of the existing interface enables automatic updates without adding dedicated internet connectivity hardware or protocols to the soundbar.
Solution Approach 2:
The soundbar leverages the TV's internet connectivity and update management capabilities as a proxy. Instead of implementing its own internet stack, the soundbar copies the update reception function from the TV, which already has established internet connectivity and firmware distribution infrastructure.
3Productivity
If HDMI ARC cable is used to transmit firmware data, then update efficiency improves with simultaneous audio transmission, but data transmission capability must be expanded
Solution Approach 1:
The patent combines audio data transmission and firmware update data transmission into a single HDMI ARC channel. By merging these two distinct data streams over the same physical connection, the system achieves efficient simultaneous transmission without requiring separate cables or interfaces.
Solution Approach 2:
The HDMI ARC connection dynamically switches between audio-only mode and dual-mode operation (audio plus firmware transfer). The system adapts the cable's functionality based on operational context, enabling flexible data transmission capabilities while maintaining backward compatibility with audio-only configurations.
Data Source
AI summary
Systems and methods for updating firmware in an audio device, such as a soundbar, operatively connected to a Smart TV, are shown and described. Firmware update data is transmitted to the audio device via an audio return channel (ARC) of an HDMI cable. In certain of the systems, the firmware update data is transmitted to the audio device when no audio is being transmitted to or played by the audio device. In other systems, the firmware update data and real-time audio data are multiplexed by the Smart TV and are sent to the audio device via the audio return channel for subsequent demultiplexing and playback of the audio.