This Recommendation | International Standard provides accompanying reference software for Rec. ITU-T H.265 | ISO/IEC 23008-2 as an electronic attachment. The software is an integral part of this Recommendation | International Standard. The use of this reference software is not required for making an implementation of an encoder or decoder in conformance to Rec. ITU-T H.265 | ISO/IEC 23008-2. Requirements established in Rec. ITU-T H.265 | ISO/IEC 23008-2 take precedence over the behaviour of the reference software. Purpose The purpose of this Recommendation | International Standard is to provide the following: ?C Reference decoder software capable of decoding bitstreams that conform to Rec. ITU-T H.265 | ISO/IEC 23008-2 in a manner that conforms to the decoding process specified in Rec. ITU-T H.265 | ISO/IEC 23008-2. ?C Reference encoder software capable of producing bitstreams that conform to Rec. ITU-T H.265 | ISO/IEC 23008-2.