mdrefa.blogg.se - Audio video sync checker

Audio video sync checker tv#

select the source: file, IP streaming, capture card/device or desktop capture.

AVSQM includes three different video quality metrics, each one being designed for a particular codec: To use AVSQM, you must choose the QoE metric which corresponds to the audio/video signals you want to process. Probes can also exchange test packets between them in order to measure transmission-related QoS parameters (packets loss, packets delay, jitter, reordering, corruption). In parallel, probes measure the health parameters of their local machine (CPU usage, RAM usage, etc.).

A test probe which captures the audio/video signals under test.

Audio video sync checker tv#

A reference probe which captures the reference audio/video signals (typically: at the output of the TV studio, before encoding).

In order to monitor one audio/video communication, at least two probes must be used:

Then the probe sends these short audio/video descriptions to the measurement server.

Then the probe computes short descriptions of short portions of the audio and video signals.

First, the probe captures or decodes the signals from audio video files, from IP streaming (in UDP, RTP, HTTP, HTTP Live Streaming, RTSP or RTMP), from capture cards/devices or from desktop capture.

The measurement server (which will generally run on one machine only, but which can run on several machines if needed)Įach probe can process one audio signal and/or one audio video signal:.

The probe (which will run on several machines).

Check non-regression after audio/video equipment firmware updateĪVSQM is a solution containing two applications:.

Monitor audio and video broadcast over different networks.

Compare the different versions (supplied by different Internet Service Providers or Telecom Operators) of a TV channel.

Machine-related parameters: CPU usage, RAM usage, etc.ĪVSQM includes three different video quality metrics, dedicated to three different codecs:.

Transmission-related parameters: packets delay, jitter, reordering, corruption, etc.

QoS (Quality of Service) is measured by the following indicators (KPI):

Skew (amount of misalignment between audio and video).

Perceived audio quality (MOS value and indicators like bandwidth, HF presence, etc.).

Perceived video quality (MOS value and indicators like blockiness, blur, etc.).

QoE (Quality of Experience) is measured by the following indicators (KPI: Key Performance Indicators): Audio Video Sync & Quality Monitor (AVSQM) is a powerful and scalable solution which enables to measure and monitor both QoE (Quality of Experience) and QoS (Quality of Service) for audio/video transmissions, especially for TV channels broadcasting.