Technologies, products,

services and advantages vs competitors

November 2013

2/14

Technologies and know-how

Perceived video quality metrics

• Différent technologies for different applications

• Know-howHuman Visual System (HVS) modeling, perception modeling

Subjective quality assessment testing (using normalized methodologies)

Signal processing (image, video, audio) and software developpement under Windows/Linux

Codecs, DirectShow (under Windows), Gstreamer (under Linux), SD/HD capture cards, streaming, network (client/server applications, HTML, javascript, PHP, FTP, SNMP), infra-red codes learning/sending

Full-reference perceived video quality metric (any codec)

No-reference perceived video quality metric (MPEG-2)

No-reference perceived video quality metric (H.264)

Parametric perceived video quality metric (MPEG-2)

Parametric perceived video quality metric (H.264)

Hybrid perceived video quality metric (MPEG-2)

Hybrid perceived video quality metric (H.264)

Full-reference perceived audio quality metric (any codec)

No-reference perceived audio quality metric (any codec)

Audio/video synchronization (lipsync) metric (any codec)

Metric for the impact of jerkiness (image freezing) on user experience Useful to measure the quality of

streaming services like

youtube, dailymotion, etc.

3/14

Main products

Perceived video quality metrics

• Video Quality Analyzer (VQA) – Full-reference metric

Benchmarking of encoders / Optimization of encoding parameters

Monitoring of a file-based encoding process (VOD)

Encoding/transcoding with chosen quality of output files

• Video Quality Monitor (VQM) – No-reference, parametric and hybrid metrics

No-reference audio/video quality measurement from files

Monitoring of audio/video quality from IP (UDP, RTP, HTTP), capture card or desktop capture

Measurement /monitoring of loudness (according to international standards)

• MPEG Monitor – Parametric metrics

Monitoring of perceived quality of several IP streams on a single machine

• Audio Video Sync Monitor (AVSM)

Monitor ing of lipsync (synchronization between audio and video) pour des live sources (from IP streams, or from capture card)

• Video Quality Measurement SDK (VQM SDK) – No-reference metrics

Library (DLL) for measurement/monitoring of perceived audio/video quality in third-party applications

4/14

Other products

Perceived video quality metrics

• YUV Convert

Conversion/processing of videos in uncompressed YUV formats

• ProcessX

Input: from a capture device, from a file or from IP streaming Output: display (windowed or full screen), saving in a file, rendering (output video card), streaming Processing: encoding or none Several processings in parallel, scripting, web interface, TCP connection

• H.264 SVC (Scalable Video Coding) Test Streams

Interoperability tests for decoders

• ACR Test Interface

Tool to perform subjective audio/video quality assessment tests

• QoS Tools (Linux/Windows)

Measurement of packets loss, packets corruption, delay, jitter, re-ordering

Simulation of transmission errors

• and also: DirectShow filters (audio/video delay, save to disk with buffer, virtual camera, audio/video switch), network simulators, neural networks…

5/14

Services• Studies

• Subjective testing

Equipment benchmarking (before purchase)

Equipment optimization (for already purchased equipment)

Audit on perceived video quality (example: quality measurement before and after a change in the

broadcasting chain)

Design and developement of customer metrics (audio, telemedicine, …)

• Custom software development

Integration of tools and technologies

Perceived video quality metrics

For subjective performance evaluation of equipment or processing

Custom development of applications for quality measurement, capture, playing, video processing

White-label development

Human visual perception modeling (resulting in metrics being much more precise than PSNR, SSIM, etc.)

The most complete range of perceived video quality metrics (full reference, no reference, parametric, hybrid),

for all kinds of applications

Permanent optimisation of metrics and updated of deployed solutions

Very detailed measurement reports (patented)

6/14

Advantage vs competitors• Technologies

• Services

• Products

High flexibility of products (especially for Video Quality Monitor and Video Quality Analyzer)

Possiblity to adapt products (for integration) and to add custom features

Video Quality Analyzer (VQA) can measure video quality ising reference videos having a different resolution

and/or a different frame rate.

Exemple (for mobile TV): measure quality of videos in QVGA at 15 fps using reference videos in SD at 25.0 fps

SDK for audio/video decoding and measurerment of audio/video quality without reference

Very detailed measurement reports with recommendations for purchase or optimization

Perceived video quality metrics

7/14

Video Quality Monitor (no reference, parametric and hybrid metrics)

• Audio video quality measurement from files, streaming or capture cards

• Measurement of blockiness, blur, contrast, jerkiness, audio and video bitrates

• Audio loudness measurement according to industry standards ITU BS 1770-2 and EBU R 128

• Camera noise measurement and monitoring (for video cameras benchmarking)

• “Decodability” metrics (ultra fast checking of the numbers of decoded audio samples and frames)

• Remote monitoring and remote consultation of results thanks to the web interface

• Curves and statistics computation between 2 user-chosen dates and times

• Infra-red support (for STB testing) and scripts execution

Perceived video quality metrics

8/14

Quality scores, quality curves, reports with statistics on

distortions)

Video Quality Monitor

(VQM)

Video Quality Monitor

(VQM)

Tested set-top boxTested set-top box

Perceived video quality metrics

Example of test/validation platformfor set-top box testing

HDMI or composite

Infra red codes

Live TV channels

9/14

• File-based solution

• Can read the most common formats: YUV, MPEG2, MPEG4/AVC, AVI, TS, MOV, WMV…

• Measurement of perceived audio and video quality

• Measurement of audio and video bitrate

• Measurement of synchronization between audio and video (lipsync)

• Automatic synchronization (alignment) with a reference video

• Results: quality scores, curves, characteristic images, VERY detailed reports (TXT, CSV, HTML)

• Remote consultation of results thanks to the web interface

• Comparison of videos with magnifying glass and horizontal/vertical profiles

• Also computes MSE & PSNR on the 3 YUV components

• Automation possibilities (command line, watch folder, scripts loading)

Video Quality Analyzer (full reference metrics)

Perceived video quality metrics

10/14

HDMI

HD-SDI

Broadcasting chain

Quality scores, quality curves, VERY detailed reports with

statistics on distortions

Tested video encoderTested video encoder

VQAVideo Quality Analyzer

VQAVideo Quality Analyzer

Reference videos

Reference videos

NetworkNetwork

Distorted videos

(captured)

Distorted videos

(captured)Video decoderVideo decoder

Automatic playing and recording of videos using our solution ProcessX

Perceived video quality metrics

Example of test/validation platformfor encoders benchmarking

11/14

MPEG Monitor (parametric metrics)• Monitoring of perceived

audio/video quality for one or several MPEG-2 or H.264 IP streams (RTP or UDP), in unicast and/or multicast

• Monitoring of audio/video signal loss, black frames and silences

• Monitoring of audio/video bitrate

• Mosaïc with video preview and audio level indication

• Alerts triggering (SNMP, emails)

• Saving of audio video samples when problems happen (from several seconds before the problem, until several seconds after the problem)

• Remote monitoring and consultation of results thanks to the web interface

• Curves and statistics computation between 2 user-chosen dates and times

Perceived video quality metrics

12/14

• Two types of agents: – probes (at least two probes) – server (at least one)

• A probe receives audio and video from IP streaming (UDP or RTP), from capture devices, or from files (useful for evaluation)

• A probe transforms audio samples and video frames in audio fingerprints and video fingerprints

• A server receives audio and video fingerprints from different probes and compares them to measure audio delay, video delay and skew (desynchronisation, or misalignment between audio and video)

• Remote monitoring and remote consultation of results thanks to the web interface

• Curves and statistics computation between 2 user-chosen dates and times

• Saving of audio video samples when problems happen (from several seconds before the problem, until several seconds after the problem)

Audio Video Sync Monitor (full reference metrics)

Perceived video quality metrics

13/14

YUV Convert

• Support of many formats:

YUV, MPEG2, MPEG4/AVC,

AVI, TS, MOV, WMV…

• Cropping, reverse frames,

swap fields, upscale,

downscale

• « Magnifying glass » and

« profiles » functions

• Input/output of list of images

• Watch Folder

• Web interface

• Conversion and processing of

videos in uncompressed YUV

formatsYUV

Perceived video quality metrics

AccepTV9 rue Alfred Kastler44307 NANTES Cedex 3FRANCE

http://www.acceptv.cominfo@acceptv.comTél. : +33 (0)6 10 71 11 64

For more information:

Academic and development partners: