noun
encoding method
Technical term in computing for the method or scheme used to encode data.
このファイルの符号化方式はUTF-8です。
The encoding method of this file is UTF-8.
符号化 is the process of encoding, while 符号化方式 refers specifically to the method or scheme used.
Compound of 符号化 (encoding) + 方式 (method, system).