sky and signiant

Copyright 2009 Signiant Inc. Company Confidential

Sky

Fraser Stirling TapelessMedia Standards


Sky Media StandardsPick a Codec any Codec

There are two main concepts when considering media standards for Video and audio

Accept and store a variety of different standards for HD and SD, transcoding when required

Use an HD codec and SD codec which can be handled natively by the platform as a whole


Sky Media StandardsPick a Codec any Codec

More analysis was required for the HD codec decisionMPEG 2 was discounted due to it’s limited bit depthPro-Res was discounted on interoperability groundsThe following codec’s were considered;

Codec Bit Rate (MB/S) Bit Depth Picture Structure Applicable Video Formats

AVC Intra 100 10 4:2:2 1080i25, 1080Psf25

Dirac 100 10 4:2:2 1080i25, 1080Psf25

DnXHD 185 10 4:2:2 1080i25, 1080Psf25

JPEG2000 100 10 4:2:2 1080i25, 1080Psf25


Sky Media StandardsConclusions

A detailed evaluation process of the codecs was performed based on;Picture QualityInteroperabilityIndustry adoption

AVC Intra 100 was chosen for HD content

IMX 50 was chosen for SD content

MXF Op1a standard is being used to wrap video, audio and ancillaries


Sky Media StandardsDon’t Forget Audio

Audio is something that Sky takes great pride in

A commitment has been made to work with uncompressed audio throughout the chain

Multichannel audio metadata will be catered for by using S2020 and S436m

This approach will allow us a far more content orientated approach to dynamic range and loudness

Dolby D will still be used as transmission format


Sky Media StandardsHow Does This Help File Delivery

If files can be delivered in the format which is handled natively to your system then it has great benefits to your output

Improvements in processing power is allowing high quality ‘mezzanine’ video formats to be created on a greater percentages of computers

Products like Signiant offer integration with the Edit platform vendors making it easier for HD programming to be created and delivered without using tape

sky and signiant

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