Disclosed is an FEC encoding method, including: sequentially storing payloads each included in sequentially supplied media packets into a buffer memory; detecting whether number of the payloads stored reaches a prescribed number or whether a period of time since the payloads have started to be stored into the buffer memory reaches a certain period of time; when detecting that the number of the payloads reaches the prescribed number, performing FEC operation using the prescribed number of payloads stored to generate first information for FEC; when detecting that the period of time since the payloads have started to be stored into the buffer memory reaches the certain period of time, performing FEC operation using the payloads stored into the buffer memory to generate second information for FEC; and outputting the first and second information together with the media packets corresponding thereto.