QCloud Datasheet

QCloud Automated Video Content Verification System Datasheet
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Media workflows are increasingly being operated in the Cloud to take advantage of the instant scalability and usage-based pricing models of Cloud platforms. Due to the significant size of the media files in these Cloud-resident workflows, it becomes cost and time prohibitive to move them back to onsite storage to perform QC. Tektronix has solved this problem by developing a File-based Media QC solution that is optimized to run on Cloud platforms. This solution is based on Tektronix' file-based QC engine with over seven years of field-experience and usage.

Key features
  • No upfront CapEx cost
  • Instant scalability always ensuring perfect sizing to workflow
  • Metered usage billing ensures you only pay for what you use
  • QC content from Amazon S3 location
  • EBS optimized to ensure persistence of data across instance reboots
  • Provides exception-based technical compliance to enable QC teams to focus on problem content and subjective requirements
  • Performs consistent and thorough checks of incoming video files against user-defined templates
  • Ensures compliance to regulatory requirements such as U.S. CALM Act, EBU R128, Canadian Closed Caption mandates, U.K. Ofcom & Japan NAB Photo-Sensitive Epilepsy (PSE)
  • Ensures quality of all audio tracks contained in the file simultaneously
  • Automatically corrects audio loudness and peak audio level issues to increase workflow efficiency and reduce CapEx/OpEx
  • Logs errors, informs automation systems, plus programmable actions such as e-mail user alert, quarantine and move files
  • Integrates with video servers, automation and MAM/DAM systems via Web-services (SOAP) API
  • Web-based multiuser interface
  • Unlimited scalability from Stand-alone (single server) to Enterprise (multi-instance cluster for higher parallel processing and high availability requirements)
  • Broadcasters and Video Service Providers – Ensuring quality, compliance, and playability of audio and video after encoding, at ingest, after editing, after transcoding, and before playout for terrestrial, satellite, cable, internet, and video-on-demand content
  • Archiving – Ensuring quality, compliance, and playability of archive content before archiving, while in archival or before retrieval from the archive
  • Content Providers – Ensuring post production and aggregated content has been correctly encoded and conforms to the required quality and format

With QCloud you can ensure that your content is ready for delivery

Quality control of file-based video that may be ingested from different sources and encoded at different bit rates, formats, and compression standards for SD/HD, VOD, and IPTV delivery presents considerable operational challenges. QCloud checks for:

  • Correct Encoding Syntax: At the digital level, the audio and video must be correctly encoded without errors in accordance with the compression standard, so that it plays out correctly at the playout server and at the customer’s STB/playout device
  • Correct Encoding Parameters: The bit rates, playtime, aspect ratio, GOP structure, video color-space, color depth, frame size, frame rate, and quantization levels
  • Correct Baseband and Quality Levels: The analog parameters of signal levels, luma, chroma, gamut, quality levels of black frames, freeze frames, black and color bars, field order, video quality (blockiness), loss of audio, audio clipping, and video and audio playtime, and verification of audio loudness and peak level
  • Correct Ancillary Data: Closed captions, teletext, DVB subtitles, and timecode
  • Regulatory Compliance: US CALM Act, EBU R128, Canadian CC mandates, U.K. & Japanese PSE regulations


Manual inspection can playout, watch, and listen but is subjective and cannot look inside the encoding to check that the correct syntax and parameters have been used. Moreover, manual inspection is prohibitively expensive, especially given today’s increasing content growth.

QCloud solves these problems, and can be easily integrated with Automation and Asset Management systems using the CeriTalk API; thus feeding them with data required to automatically decide on next workflow steps or drawing attention to the few assets that need review by experts.


Customer AWS infrastructure


The XML-based test templates can be exchanged between QCloud systems, and applied as the definition of the required test standards between suppliers and broadcasters to establish Service-level Agreements and reduce costly churn (rework of content).

User interface

The easy-to-use Web browser interface shows job status results at the top level.




You can view details for each file within a job.




You can view alerts for each error within the file.




You can view details of each alert including video thumbnails and audio waveforms of the erroneous frame and surrounding frames.




You can view reports by job, type, date range, file name, etc.




With just a few clicks, you can quickly "See and Solve" test results.




ASEAN / Australasia (65) 6356 3900 Austria 00800 2255 4835*Balkans, Israel, South Africa and other ISE Countries +41 52 675 3777 
Belgium 00800 2255 4835*Brazil +55 (11) 3759 7627 Canada 1 800 833 9200 
Central East Europe and the Baltics +41 52 675 3777 Central Europe & Greece +41 52 675 3777 Denmark +45 80 88 1401 
Finland +41 52 675 3777 France 00800 2255 4835*Germany 00800 2255 4835*
Hong Kong 400 820 5835 India 000 800 650 1835 Italy 00800 2255 4835*
Japan 81 (3) 6714 3010 Luxembourg +41 52 675 3777 Mexico, Central/South America & Caribbean 52 (55) 56 04 50 90 
Middle East, Asia, and North Africa +41 52 675 3777 The Netherlands 00800 2255 4835*Norway 800 16098 
People's Republic of China 400 820 5835 Poland +41 52 675 3777 Portugal 80 08 12370 
Republic of Korea 001 800 8255 2835 Russia & CIS +7 (495) 6647564 South Africa +41 52 675 3777 
Spain 00800 2255 4835*Sweden 00800 2255 4835*Switzerland 00800 2255 4835*
Taiwan 886 (2) 2722 9622 United Kingdom & Ireland 00800 2255 4835*USA 1 800 833 9200 

* European toll-free number. If not accessible, call: +41 52 675 3777 

Updated 10 April 2013 

For Further Information. Tektronix maintains a comprehensive, constantly expanding collection of application notes, technical briefs and other resources to help engineers working on the cutting edge of technology. Please visit www.tektronix.com.

Copyright © Tektronix, Inc. All rights reserved. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supersedes that in all previously published material. Specification and price change privileges reserved. TEKTRONIX and TEK are registered trademarks of Tektronix, Inc. All other trade names referenced are the service marks, trademarks, or registered trademarks of their respective companies.


All frame sizes, bit rates, and resolutions for SD/HD and mixed workflows
MPEG TS/PS, MXF, GXF, MP4, QuickTime, ASF, 3GPP, AVI, LXF, Apple HLS, Microsoft SS
MPEG-2 (IMX, XDCAM), H.264/AVC, MPEG-4, H.263, VC-1/WMV, DV/DVCPro25/50/100/HD, Apple ProRes 422/422(HQ)/422(Proxy)/422(LT)/444, AVC-Intra (High10 Intra, High422 Intra, High444 Intra, and CAVLC Intra), JPEG-2000, DNxHD, Raw YUV and RGB
MPEG-1/2, AAC, HE AAC (LOAS/LATM), PCM (AES, BWF, AIFF, WAV, SMPTE 302M), DV, WMA, Dolby D / AC-3, Dolby E
Test templates and levels are user-controlled and include:
Container-level transport stream tests

Correct standard and integrity

File size, bit rate, playtime, number of video and audio streams in transport container

Packet size, CableLabs VOD compliance

Signaling and integrity of closed captioning, teletext, DVB subtitles, and XDS content advisory tests

Timecode continuity, integrity, and synchronization

MXF metadata testing

Apple HLS and/or Microsoft SS ABR content readiness testing for OTT services

Video tests

Correct encoding standard, profile and level, and syntax checks for encoding errors

GOP structure, frame rate, bit rate, playtime, AFD, frame size, picture scan type, aspect ratio

Baseband tests including gamut levels, luma, chroma, signal levels, letterbox/pillarbox, playtime

Color depth, chroma sampling, copyright

Black frames (lead in, lead out, and during the video), video quality (blockiness), frozen frames, field order, missing frame, quantization, cadence, tape artifacts

PSE testing per U.K. Ofcom and Japan NAB standards

Audio tests (simultaneously on all audio tracks)

Correct encoding standard, profile, and syntax checks for encoding errors, Dolby-E guard band interval

Sample rate, bit rate, playtime

Number of channels, peak and minimum signal levels

Audio silence, clipping, mute, test tones

PPM audio ballistics

Long and short audio loudness tests for all supported audio codecs per ITU-R BS.1770-2 standard (including different audio loudness tests on different channels)

True peak-level tests for all supported audio codecs

Audio loudness tests across multiple tracks (i.e. situations where grouped channels are spread across tracks)

Automated audio loudness correction across all audio tracks using Dolby Dialog Intelligence

Action templates and reporting

Copy or move file on success or error

E-mail alerts with test reports

Web-based on-screen job reports and detailed drill-down

Text/HTML/PDF query reports of all files in the database


SOAP based Web-services

CeriTalk Automation API

Multiple user templates and profiles
Configurable for different content types and sources
XML-based templates
Can be imported and exported
File reprocessing
Automatic reprocessing of previously tested files after rework
System requirements
Single media asset processing
A single media file can be processed with optimal performance on an Amazon EC2 Extra-Large instance type with the following specifications:
15 GB
EC2 compute units
8 (4 virtual cores with 2 EC2 compute units each)
Instance storage
1,690 GB
I/O performance
EBS-optimized available
1,000 Mbps
API name
Two media asset processing
Two media files can be processed with optimal performance on an Amazon EC2 2Extra-Large instance type with the following specifications:
30 GB
EC2 compute units
26 (8 virtual cores with 3.25 EC2 compute units each)
Instance storage
EBS only
I/O performance
EBS-optimized available
1,000 Mbps
API name
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