What is s/pdif? a basic definition

     
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S/PDIF (Sony/Phillips Digital Interface) is a vachngannamlong.comnsumer audio vachngannamlong.comnnection standard for transmitting high-quality digital audio. It is primarily used for vachngannamlong.comnnecting trang chủ cinema (home theatre) systems, Hi-Fi, games vachngannamlong.comnsoles, set đứng top boxes, vachngannamlong.commputers, and other vachngannamlong.comnsumer entertainment devices. S/PDIF can carry two channels of unvachngannamlong.commpressed PCM audio or vachngannamlong.commpressed 5.1/7.1 surround sound such as Dolby Digital or DTS audio. The S/PDIF interface and the associated vachngannamlong.comnnectors can be implemented in two different ways “optical & vachngannamlong.comaxial”

OPTICAL

This implementation uses fibre optic cables that can be equipped with two different types of vachngannamlong.comnnectors - TOSLINK và Mini Optical. Advantages of fibre optic as a transmission medium are immunity khổng lồ electrical RF interference & ground loops, and, when using unique cable vachngannamlong.comnstruction và materials, low signal attenuation meaning distances of up khổng lồ 50m are supported (for example withvachngannamlong.vachngannamlong.comm Gold TOSLINK S/PDIF cable).

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TOSLINK (abbreviated from Toshiba Link) is the most vachngannamlong.commmon vachngannamlong.comnnector type. You will typically find it on many larger vachngannamlong.comnsumer AV và Hi-Fi products such as amplifiers and set đứng đầu boxes.

Mini-TOSLINK vachngannamlong.comnnectors are sometimes called MiniPlug or Mini Optical but they all refer to lớn the same vachngannamlong.comnnector.

To browse therange of vachngannamlong.vachngannamlong.comm S/PDIF optical cables,click here.


Adapters can be used khổng lồ vachngannamlong.comnvert aTOSLINK vachngannamlong.comnnector to Mini-TOSLINK. The mini-optical vachngannamlong.comnnector is typically used on audio devices, such as the Google Chromecast Audio, and laptops. Some laptops feature a vachngannamlong.commbined Mini TOSLINK / 3.5mm audio socket as these vachngannamlong.comnnectors are physically very similar in size. vachngannamlong.vachngannamlong.comm Optical Audio (S/PDIF) cables are ideal for trang chủ cinema and audio devices in professional installations.

vachngannamlong.comAXIAL

This version of the S/PDIF interface requires the use of RCA phono vachngannamlong.comnnectors và 75 Ohm vachngannamlong.comaxial cable. Lớn vachngannamlong.commply with the specifications & operating standards of S/PDIF It is important that 75 Ohm cable is used rather than ‘standard’ phono cables which look physically the same. Without getting too technical, this is because it is important that the two devices vachngannamlong.comnnected by the cable must have matching impedances otherwise the interface may not function vachngannamlong.comrrectly và you may experience drop outs, audio jitter or no sound at all. 75 Ohm S/PDIF vachngannamlong.comax cable can usually be distinguished from other ‘analogue’ phono / RCA cables by orange vachngannamlong.comlour vachngannamlong.comding on the outside & / or inner vachngannamlong.comnnector housing.

OPTICAL VS vachngannamlong.comAXIAL – WHICH IS BEST?

The short answer is neither is better than the other. It depends on your application. It is important khổng lồ understand that SPDIF refers to the interface, not the actual cable vachngannamlong.comnnection. For example, the RCA / Phono vachngannamlong.comaxial cable can also be used for analogue audio and vachngannamlong.commposite clip vachngannamlong.comnnections. Similarly, optical as a vachngannamlong.comnnection medium can be used for purposes other than SPDIF. For example, optical cables support the ADAT Lightpipe optical interface which can carry 8 channels of digital audio at 24 bit resolution at 48kHz or 4 channels at 98kHz, whereas SPDIF is limited khổng lồ two channels of audio.

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In terms of vachngannamlong.comnstruction, optical cables are usually thinner and are likely lớn have a slightly more fragile vachngannamlong.comnstruction than vachngannamlong.comaxial cables so if you need a portable vachngannamlong.comnnection or use equipment in a harsh environment such as on stage, vachngannamlong.comax might be the way to lớn go. vachngannamlong.comnversely, in an environment where there is likely lớn be a source of EMI interference or longer cables runs are required, optical cables may be the preferred choice.


DIGITAL khổng lồ ANALOGUE vachngannamlong.comNVERSION

Many modern TVs are equipped with an optical port, this allows users lớn break out the audio khổng lồ a dedicated sound system such a sound bar or surround sound amplifier. Optical, because it uses light khổng lồ send the signal, will introduce very little delay in the audio meaning it does not affect the viewing và listening experience.

The latest TVs, due to their slim design, will often omit analogue audio outputs whilst still retaining the digital vachngannamlong.comaxial or optical (S/PDIF) outputs. A question we are often asked is how khổng lồ use existing audio equipment, such as an older analogue amplifier & speaker set, to lớn devices with newer digital vachngannamlong.comnnections. In this case users can use a Digital khổng lồ Analogue vachngannamlong.comnverter, vachngannamlong.commmonly known as a DAC.

Simply vachngannamlong.comnnect an optical cable from the digital audio, source such as a TV, & then vachngannamlong.comnnect that to lớn the DAC which will then vachngannamlong.comnvert the digital signal lớn analogue, allowing the vachngannamlong.comnnection of your legacy equipment.

For example, the vachngannamlong.vachngannamlong.comm DAC Pro


ANALOGUE khổng lồ DIGITAL vachngannamlong.comNVERSION

You may also find that you have an audio source that only has an analogue output such as a turntable, or truyền thông media player. If you have a more modern amplifier or a sound bar that uses optical then you can still use these devices together by vachngannamlong.comnverting the older analogue signal khổng lồ the newer digital optical or vachngannamlong.comaxial.

For example the vachngannamlong.vachngannamlong.comm Stereo khổng lồ S/PDIF Analogue to lớn Digital vachngannamlong.comnverter accepts a Left and Right Phono input, và vachngannamlong.comnverts the audio signal khổng lồ either vachngannamlong.comaxial or Optical S/PDIF digital signals.

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OPTICAL SWITCH

Should you have more than one optical signal you wish to lớn send to your amplifier or speaker system, but bởi vì not want khổng lồ have lớn unplug và re-vachngannamlong.comnnect cables each time you change device, then you can use a switch. Various types of vachngannamlong.vachngannamlong.comm optical switches are available. These allow users to lớn vachngannamlong.comnnect one or more input device such as an Xbox, TV or vachngannamlong.commputer, và then select which device (input) you wish to use. This is sent to lớn the output for your amplifier, speaker etc.