The ITU-T, considering that it is desirable to use common standards for the transmission of high-quality sound; that it is desirable to use as few code conversions as possible in the international digital sound exchange procedure; that to facilitate the exchange of signals, it is desirable to render the transmission interfaces as transparent as possible to the transmitted message content.
ITU-T J.51 SPANISH-1994 history
1994ITU-T J.51 SPANISH-1994 GENERAL PRINCIPLES AND USER REQUIREMENTS FOR THE DIGITAL TRANSMISSION OF HIGH QUALITY SOUND PROGRAMMES