ETSI PRETS 300 142-1991 综合业务数字网(ISDN)和其它数字通信网络视听电信业务的p x 64 Kbit/s视听业务的视频编解码器(T/N31-04)
Integrated Services Digital Network (ISDN) and Other Digital Telecommunications Networks Audiovisual Teleservices Video Codec for Audiovisual Services at p* 64 Kbit/s (T/N 31-04)