The standardization body ISO/IEC JTC 1/SC 29/WG 11, also known as the Moving Pictures Experts Group(MPEG), was established in 1988 to specify digital video and audio coding schemes at low data rates. MPEGcompleted its first phase of audio specifications (MPEG-1) in November 1992, ISO/IEC 11172-3. In its secondphase of development, the MPEG Audio subgroup defined a multichannel extension to MPEG-1 audio that isbackwards compatible with existing MPEG-1 systems (MPEG-2 BC) and defined an audio coding standard atlower sampling frequencies than MPEG-1, ISO/IEC 13818-3.The International Organization for Standardization (ISO) and International Electrotechnical Commission (IEC)draw attention to the fact that it is claimed that compliance with this document may involve the use of patents.The ISO and IEC take no position concerning the evidence, validity and scope of this patent right.The holder of this patent right has assured the ISO and IEC that he is willing to negotiate licences underreasonable and non-discriminatory terms and conditions with applicants throughout the world. In this respect,the statement of the holder of this patent right is registered with the ISO and IEC. Information may be obtainedfrom the companies listed in Annex D.Attention is drawn to the possibility that some of the elements of this document may be the subject of patentrights other than those identified in Annex D. ISO and IEC shall not be held responsible for identifying any orall such patent rights.