Vehicle-Mounted Device Directional Audio Filtering
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Solution Overview
Problem
Existing vehicle-mounted devices using DSRC technology face issues with incorrectly receiving information due to electric wave leakage from adjacent lanes, leading to confusion for drivers, as they cannot distinguish between information relevant to their own lane and adjacent lanes.
Innovation Solution
The system includes a roadside apparatus that emits a radial electric wave with audio instruction information indicating the traveling direction, and a vehicle-mounted device that outputs this information using distinct speech characteristics such as talker and pitch based on the direction, ensuring the driver receives relevant information for their own lane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If DSRC radial electric waves are emitted to distribute information to vehicles, then information distribution coverage is improved, but electric wave leakage to adjacent lanes occurs causing erroneous information reception
Solution Approach 1:
The patent applies local quality by embedding direction identification information within the transmitted data stream. Each information packet includes metadata indicating the intended traveling direction (inbound or outbound), allowing the receiving vehicle to locally verify whether the information corresponds to its current direction of travel. This selective processing based on local direction matching resolves the contradiction by maintaining broad coverage while filtering out harmful leakage effects.
Solution Approach 2:
The patent introduces direction identification information as an intermediary element between the roadside apparatus and the vehicle-mounted device. This intermediary data layer acts as a mediator that enables the receiving vehicle to verify the applicability of received information without requiring physical isolation of the electric waves. The intermediary direction tag allows legitimate information to pass through while blocking erroneous information from adjacent lanes.
2Quantity of substance
If vehicle-mounted devices receive all transmitted information, then information completeness is improved, but driver comprehension accuracy deteriorates due to inability to distinguish relevant from irrelevant information
Solution Approach 1:
The patent implements feedback by enabling the vehicle-mounted device to check the direction identification information against its own traveling direction and selectively process or discard incoming information. This feedback mechanism ensures that only relevant information (matching the vehicle's direction) is processed and presented to the driver, while irrelevant information from opposite directions is automatically filtered out. This resolves the contradiction by maintaining complete information reception capability while ensuring high relevance through direction-matching feedback.
Solution Approach 2:
The patent applies segmentation by dividing the information stream into direction-specific segments using direction identification tags. Each information packet is segmented with metadata indicating whether it pertains to inbound or outbound traffic. The vehicle-mounted device then processes only the segment corresponding to its current traveling direction, effectively separating relevant from irrelevant information while maintaining the ability to receive all transmitted data.
3Productivity
If speech output is provided for all received information, then information delivery completeness is improved, but driver confusion increases due to irrelevant information from opposite lanes
Solution Approach 1:
The patent applies dynamics by making the speech output function conditional rather than static. The vehicle-mounted device dynamically adjusts its speech output behavior based on real-time comparison between the received direction identification information and the vehicle's current traveling direction. When directions match, speech output is activated; when they differ, speech output is suppressed. This dynamic control resolves the contradiction by maintaining high information delivery efficiency for relevant information while preventing driver confusion from irrelevant information.
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 solution allows drivers to accurately comprehend whether the received information is significant for their own vehicle, reducing confusion and ensuring safe driving by differentiating between information for their lane and adjacent lanes.
Implementation Method 1
emits a radial electric wave to a predetermined area on the road to form a communication area
Implementation Method 2
the radial electric wave may be reflected on the vehicle or by a construction such as a building, and the reflected electric wave may be directly leaked to an adjacent lane
Data Source
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AI summary
An information distribution system includes a roadside apparatus which transmits an utterance type provided information containing audio instruction information based on a traveling direction to be provided by the utterance type provided information. When an vehicle-mouned device receives an utterance type provided information via a communication unit from the roadside apparatus, the vehicle-mounted device outputs different utterance type provided information by an audio in accordance with the audio instruction in-formation contained in the received utterance type provided information, so that a vehicle driver can judge whether the information provided from the roadside apparatus is significant information.