ETSI PRETS 300 142-1998 综合业务数字网(ISDN)和其它数字通信网络.非电话信号的线路传输.p x 64 kbits传输的视听业务的视频编解码器(ITU-T建议H.261(1993),修正本)
Integrated Services Digital Network (ISDN) and Other Digital Telecommunications Networks; Line Transmission of Non-Telephone Signals; Video Codec for Audiovisual Services at p x 64 kbit/s ITU-T Recmn H.261 (1993), Modified