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Excelfore’s eSync Adaptive Delta Compression Engine optimizes compression of software updates for OTA delivery

Excelfore has launched eSync Adaptive Delta Compression Engine. The engine optimizes compression of software updates for OTA delivery within the particular environment of the automotive industry. It is aimed at enabling carmakers to minimize service costs, airtime costs and vehicle downtime, while increasing customer satisfaction.


A software delta update downloads only the differences between a new version of software and the prior version, reducing the amount of data that must be transmitted. The full new version of the software is then reconstructed locally. When there are millions of vehicles, delivering delta updates is an effective mechanism to reduce airtime requirements and transmission costs.


The Adaptive Delta Compression Engine uses binary differencing algorithms that have been enhanced with Excelfore’s compression technology, enabling it to dynamically adjust compression techniques to the unique requirements of delta updates in the automotive industry.

Carmakers, today who provide OTA updates often use delta compression schemes developed for the smartphone market. These do not consider the substantial vehicle downtime while new software is decompressed, reconstructed, and installed in many electronics devices in today’s connected car. Excelfore has improved on existing OTA techniques by using an adaptive approach.

The eSync System is a cloud platform for secure transactions with the vehicle, and with the various electronic end devices within the vehicle. It can be used to deliver and update software and firmware over the air, as well as for pulling diagnostics and telematics data from the devices in the vehicle.


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