Video: JPEG XS and SMPTE ST 2110 for IPMX

Both broadcast and professional AV are undergoing a transition to IP. For Pro-AV, the benefits are similar to those for Broadcast such as less cabling, cables are bi-directional and reduced space. But for Pro-AV, there is a big incentive to re-use CAT5e cabling unlike the typical SMPTE 2110 deployments which are on 10 gig cabling.

Jean-Baptiste Lorent from intoPIX explains how JPEG XS helps enable cable reuse and, at the same time, brings the advantages of open interoperability and IP to the Pro-AV market. JPEG-XS is a light compression codec which minimises latency. JPEG XS, explains Jean-Baptiste, started in 2016 with light compression format TICO which, working with the JPEG committee has become JPEG-XS. intoPIX have blinded tests showing that at a 10:1 compression ratio, there is no difference observable between the uncompressed source and the JPEG-XS encoder.

Whilst the practical benefits of JPEG-XS are discussed in this talk from Nevion, Laurent outlines that JPEG-XS has a low computational overhead, 0.1 milliseconds encode to decoder.

A very interesting feature is the embedded downscaling meaning if you sent an 8K image as JPEG-XS, a decoder need only decode a UHD or HD resolution version of it – without having to do a computationally expensive downconversion to the desired resolution after having decoded the whole thing 8K image. Jean-Baptiste suggests this would be ideal for devices such as multiviewers which typically show images at much lower than their native resolution.

Looking again at the idea of 1Gbe cable reuse, Jean-Baptiste looks at the data rates achievable with JPEG-XS. HD video under JPEG-XS is 150-390Mbps allowing 2 or more HDs per 1Gbe Cat 5e cable. Using Cat 6 or Cat 5e to run 10Gbe (up to around 40m) allows up to four 8K streams. So it’s practical to use existing infrastructure.

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Jean-Baptiste Lorent Jean-Baptiste Lorent
Director Marketing & Sales,
intoPIX sa

Video: JPEG-XS and ST 2110

JPEG XS is a brand-new, ultra-low latency standard delivering JPEG 2000 quality with 1000x lower latency; microseconds instead of milliseconds. This mezzanine compression standard promises compression ratios of up to 10:1, resolutions of up to 8K plus HDR and features frame rates from 24 to 120 fps.

Jean-Baptiste Lorent from intoPIX shows how JPEG-XS can be used with SMPTE ST-2110 stack. Part -22 of ST 2110 allows for transport of compressed video essence as an alternative to uncompressed essence – all the other elementary streams stay the same, just the video RTP payload changes. This approach saves a lot of bandwidth and keeps all the existing advantages of moving from SDI to IP at the same time.

Based on TICO which arrived in products four or more years ago allowing HD products to support UHD workflows, JPEG XS was also designed for visually lossless quality and maintaining that quality over multiple re-encoding stages. The combination of very-low microsecond-latency and relatively low bandwidth makes it ideal for remote production of live events.

Watch now!


Jean-Baptiste Lorent Jean-Baptiste Lorent
Director Marketing & Sales