In-Vehicle Data Reduction for Mobility Services
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Solution Overview
Problem
The operation costs, such as communication fees and maintenance costs of databases, become excessive when a large amount of data is uploaded from vehicles to clouds in mobility service systems.
Innovation Solution
A mobility service system that includes an in-vehicle device and a management server, where the in-vehicle device reduces the data amount of acquired content using in-vehicle reduction criteria and uploads the reduced content to the management server, which further reduces the data amount using server reduction criteria before transmitting it to end users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large amount of data is uploaded from vehicles to clouds, then service quality for end users is maintained, but operation costs such as communication fees and maintenance costs of databases become excessive
Solution Approach 1:
The in-vehicle device performs preliminary data reduction before uploading to the cloud by generating thumbnails from video content and extracting only relevant audio segments. This preliminary processing reduces the data volume that needs to be transmitted and stored, thereby lowering communication fees and database maintenance costs while preserving the essential service quality for end users.
Solution Approach 2:
The system extracts only the necessary portions of data from the original content. The in-vehicle device extracts key visual information as thumbnails and important audio segments, separating these essential elements from the complete video and audio files. This extraction approach maintains service quality by preserving critical information while discarding redundant data, thus reducing operation costs.
2Adaptability or versatility
If all acquired content is uploaded to the management server, then complete service functionality is provided, but data transmission and storage costs increase significantly
Solution Approach 1:
Before uploading content to the management server, the in-vehicle device performs preliminary processing to generate condensed representations. Video content is converted into thumbnails, and audio content is segmented to retain only relevant portions. This preliminary action ensures that the management server receives reduced data volumes while still maintaining the adaptability and versatility of service functionality.
Solution Approach 2:
The system changes the parameter of data representation by transforming full-resolution video into lower-resolution thumbnails and converting continuous audio into discrete segments. This parameter transformation reduces the quantity of data by several orders of magnitude while preserving the essential information needed for service functionality, thus resolving the contradiction between data amount and service adaptability.
3Reliability
If high-resolution video and audio content is transmitted to end users, then service quality is maintained, but communication bandwidth requirements and storage costs increase
Solution Approach 1:
The system extracts essential visual and auditory information from complete media files. Instead of transmitting full video and audio content, the in-vehicle device extracts representative thumbnails and relevant audio segments. This extraction maintains service quality by preserving key information while dramatically reducing the data transmission volume and storage costs associated with delivering content to end users.
Data Source
AI summary
Disclosed is a technique of reducing an amount of data of a content including a video or an audio, and the content is acquired by an acquisition device of a vehicle. In the technique, an in-vehicle device generates an in-vehicle partial content by reducing a data amount of the content using an in-vehicle reduction criterion corresponding to an application program executed by the in-vehicle device. The in-vehicle partial content is uploaded to a management server. The management server generates a server partial content by reducing a data amount of the in-vehicle partial content using a server reduction criterion corresponding to information related to the in-vehicle device. A terminal content is transmitted to a terminal device of an end user of a service based on the server partial content.