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The RCA connectors are typically colour-coded orange to differentiate from other RCA connector uses such as composite video. S/PDIF is nearly identical at the protocol level, but uses either coaxial cable (with RCA connectors) or optical fibre ( TOSLINK i.e., F05 or EIAJ optical), both of which cost less than the XLR connection used by AES3. This resulted from the desire of the various stakeholders to have at least sufficient similarities between the two interfaces to allow the use of the same, or very similar, designs for interfacing ICs. S/PDIF was developed at the same time as the main standard, AES3, used to interconnect professional audio equipment in the professional audio field. ĭigital Audio Coaxial RCA connector (orange) S/PDIF is standardized in IEC 60958 as IEC 60958 type II (IEC 958 before 1998). Sony and Philips were the primary designers of S/PDIF. ![]() The name stands for Sony/Philips Digital Interconnect Format but is also known as Sony/Philips Digital Interface. S/PDIF is a data link layer protocol as well as a set of physical layer specifications for carrying digital audio signals over either optical or electrical cable. S/PDIF can carry two channels of uncompressed PCM audio or compressed 5.1 surround sound (such as DTS audio codec or Dolby Digital codec) it cannot support lossless surround formats that require greater bandwidth. S/PDIF is based on the AES3 interconnect standard. S/PDIF interconnects components in home theaters and other digital high-fidelity systems. ![]() The signal is transmitted over either a coaxial cable with RCA connectors or a fiber optic cable with TOSLINK connectors. S/PDIF ( Sony/Philips Digital Interface) is a type of digital audio interface used in consumer audio equipment to output audio over relatively short distances.
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