In Broadcast - April 2012 - 29


ISSUE 7 - APRIL 2012 | WWW.INBROADCAST.COM

InFILE

Softel: Multichannel Subtitling Trend
Softel explain why early binding can streamline subtitle processing workflow
As channel count expands, and viewers’ reach extends over wider territories and communities, the quantity of subtitle channels and subtitle language streams are multiplying. Softel has first-hand experience with this pervasive trend, providing subtitle software to broadcasters such as the BBC, CBS, ESPN, HBO, MTV, RAI, SBS and Turner for over 25 years. “We are increasingly finding that customers are looking for subtitle broadcast solutions that can scale to 20+ channels, each with eight+ language streams – it is quite clear that the market is demanding next generation technology that is able to simplify the operational procedures to support these new challenges,” says Gordon Hunter, Softel’s Chief Sales Officer. Conventional video playout system architecture places subtitle transmission near the end of the live video chain. This live binding relies on accurate synchronisation between subtitle and channel automation, and places great faith that subtitle files are valid for each programme event. “Operationally, live binding of subtitles scales to say four or five channels,” says Hunter, “but the feedback from the user base is that there is simply not the rack space for dedicated subtitle hardware, nor the resources to fix ‘time of air live bind’ subtitle issues in multichannel facilities.” Darren Forster, Softel’s Chief Technology Officer, says that it makes sense to consider an engineering solution, which ‘binds’ subtitles to the video at an earlier point in the asset management process. Softel calls this ‘early binding’ of subtitles to video. The migration within the industry towards ingest, transcoding, and playout of video ‘files’ opens up the opportunity to insert subtitles into these video files, before transmission, but there are challenges in doing so. The absence of unified SD and HD video file storage formats, and the range of global subtitle data formats such as Teletext, Closed Captions, Open Captions, DVB subtitles and ARIB captions, have made the design and implementation of a software subtitle encode application a formidable task, explains Forster. However, he says, it’s been worth the effort and the early adopters of our Swift vTX ‘soft’ encoder are reaping the benefits. Swift vTX, Softel’s solution for offline subtitle encoding, transcoding and extraction, integrates seamlessly with leading video servers such as Harmonic (Omneon), Grass Valley, Harris and Seachange. Softel customers have easily adopted the concept of early, late and live binding of subtitles to video. “Users see the benefits of early binding – the ability to QC subtitled programmes, to archive video and subtitles together, and the capability to simplify time-ofair processes,” says Hunter. “But in offering late and live bind options as well, we also address the needs of late arriving subtitled content and live programme uses cases.” ■

29

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The video content delivery process


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Table of Contents for the Digital Edition of In Broadcast - April 2012

In Broadcast - April 2012
Contents
Broadcast Networks Delivers for Arqiva
Swedish Hockey Safe in the Bank
Viewcast Launches Niagara 9100 Series
Cavena: Enhancing the Value of Content
Broadcast Pix Announces Video Control Center 3.0
Telecast’s Latest Innovations
Glidecam Introduces XR-Series Stabilisers
Qvest Media Live With Code One Streaming
Volicon Extends Observer Utility
Petrol Bags Add to Audio & DSLR Range
In Broadcast - April 2012 - In Broadcast - April 2012
In Broadcast - April 2012 - Cover2
In Broadcast - April 2012 - Contents
In Broadcast - April 2012 - Broadcast Networks Delivers for Arqiva
In Broadcast - April 2012 - 5
In Broadcast - April 2012 - Swedish Hockey Safe in the Bank
In Broadcast - April 2012 - 7
In Broadcast - April 2012 - 8
In Broadcast - April 2012 - 9
In Broadcast - April 2012 - 10
In Broadcast - April 2012 - 11
In Broadcast - April 2012 - 12
In Broadcast - April 2012 - 13
In Broadcast - April 2012 - 14
In Broadcast - April 2012 - 15
In Broadcast - April 2012 - 16
In Broadcast - April 2012 - 17
In Broadcast - April 2012 - 18
In Broadcast - April 2012 - 19
In Broadcast - April 2012 - 20
In Broadcast - April 2012 - 21
In Broadcast - April 2012 - Viewcast Launches Niagara 9100 Series
In Broadcast - April 2012 - 23
In Broadcast - April 2012 - 24
In Broadcast - April 2012 - 25
In Broadcast - April 2012 - 26
In Broadcast - April 2012 - Cavena: Enhancing the Value of Content
In Broadcast - April 2012 - 28
In Broadcast - April 2012 - 29
In Broadcast - April 2012 - 30
In Broadcast - April 2012 - 31
In Broadcast - April 2012 - 32
In Broadcast - April 2012 - 33
In Broadcast - April 2012 - 34
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In Broadcast - April 2012 - 36
In Broadcast - April 2012 - 37
In Broadcast - April 2012 - Broadcast Pix Announces Video Control Center 3.0
In Broadcast - April 2012 - 39
In Broadcast - April 2012 - 40
In Broadcast - April 2012 - 41
In Broadcast - April 2012 - 42
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In Broadcast - April 2012 - 49
In Broadcast - April 2012 - 50
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In Broadcast - April 2012 - 52
In Broadcast - April 2012 - 53
In Broadcast - April 2012 - Telecast’s Latest Innovations
In Broadcast - April 2012 - 55
In Broadcast - April 2012 - Glidecam Introduces XR-Series Stabilisers
In Broadcast - April 2012 - 57
In Broadcast - April 2012 - 58
In Broadcast - April 2012 - 59
In Broadcast - April 2012 - 60
In Broadcast - April 2012 - 61
In Broadcast - April 2012 - 62
In Broadcast - April 2012 - Qvest Media Live With Code One Streaming
In Broadcast - April 2012 - 64
In Broadcast - April 2012 - 65
In Broadcast - April 2012 - Volicon Extends Observer Utility
In Broadcast - April 2012 - 67
In Broadcast - April 2012 - 68
In Broadcast - April 2012 - 69
In Broadcast - April 2012 - Petrol Bags Add to Audio & DSLR Range
In Broadcast - April 2012 - Cover3
In Broadcast - April 2012 - Cover4
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