Wireless Subwoofer Multiplexing LFE and Surround Audio Signals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional home theater systems face installation challenges due to the need for physical wiring of surround speakers, which can result in poor audio quality when using analog wireless solutions or high costs with digital technologies, and require separate power sources for wireless surround sound speakers.
Innovation Solution
A wireless subwoofer system that receives digitally multiplexed Low Frequency Effects (LFE) and surround channel signals, powers surround speakers, and transmits these signals wirelessly to remote surround speakers, eliminating the need for separate power wires and providing digital sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless surround sound solutions are implemented, then installation ease is improved, but audio quality deteriorates when using analog solutions
Solution Approach 1:
The patent replaces analog wireless transmission with digital transmission technology. The receiver converts digital audio signals to a format suitable for wireless transmission, and the transmitters receive and convert these signals back to drive the speakers. This substitution of digital for analog technology enables wireless operation while maintaining high audio quality, resolving the contradiction between installation ease and audio quality.
2Reliability
If digital technologies are used for wireless surround sound, then audio quality is improved, but cost increases
Solution Approach 1:
The patent divides the wireless surround sound system into separate functional components: a receiver that processes digital audio signals and converts them to transmission format, and individual transmitters for each speaker that receive and convert signals locally. This segmentation allows the system to use cost-effective digital technology only where needed (in the receiver) while using simpler analog circuitry in the distributed transmitters, reducing overall system cost while maintaining digital audio quality.
3Adaptability or versatility
If surround speakers are placed at remote locations, then installation flexibility is improved, but wiring complexity increases
Solution Approach 1:
The patent replaces the mechanical wiring system with a wireless transmission system. Instead of running physical cables from the receiver to speakers located in difficult-to-reach areas, the system uses wireless transmitters that can be placed anywhere within wireless range. This eliminates the wiring complexity that would otherwise increase with remote speaker placement, while maintaining maximum installation flexibility.
4Ease of operation
If battery driven surround speakers are used, then wiring requirements are reduced, but practicality deteriorates
Solution Approach 1:
The patent replaces the battery power system with a wired power system for the transmitters. The transmitters are powered by AC electricity through standard power cords, eliminating the need for batteries. This substitution maintains wiring requirements for power but eliminates the practicality issues associated with battery operation (weight, limited runtime, replacement needs), making the system more practical for permanent installation while still eliminating audio wiring to the speakers.
Data Source
AI summary
A subwoofer is equipped with a wireless receiver to receive signals containing information for a Low Frequency Effects (LFE) channel and information for both surround channels. In one form, the LFE is added to one or both surround channels to provide a stereo surround signal (containing both surround channels) including a multiplexed LFE channel. The subwoofer utilizes the LFE channel, powers surround speakers, and passes the surround signals to respective surround speakers. A receiver multiplexes LFE signals into either one or both surround sound audio channels. A digital RF transmitter of the receiver transmits the combined subwoofer/surround channels to the wireless receiver of the subwoofer. The remote subwoofer is connected to a power source. The surround speakers are connected to the subwoofer so as to receive the surround channels and be powered thereby.