Method, transmitter and system for continuously optimizing data compression using frequency-based dictionary look-up tables in a vehicle

摘要

A method is provided for continuously optimizing data compression using frequency-based dictionary look-up tables for communication between a transmitter in a vehicle and a receiver. The procedure has the following steps. First and second frequency-based dictionary look-up tables are provided in a transmitter. The sender receives a block of data and compresses it using the first table. The second table is updated using the data block, and a difference between a compression efficiency of the first table and a compression efficiency of the second table for the data block is calculated. The compressed data block is transmitted to the receiver. If the difference is more than a predefined threshold value, the content of the first table is replaced by the content of the updated second table in the transmitter. The content of the updated second table is then also transmitted to the recipient.