Fingerprint Comparison and Analysis
iControl’s fingerprint comparison and analysis feature allows you to perform any of the following functions across potentially broad signal distribution networks:
• detect and measure lip sync errors
• compare video content
• compare audio content
In conjunction with Densité cards, iControl allows you to monitor conditions where the synchronization between audio and video has been severed (lip sync detection). Alternatively, you may choose to compare strictly video content or audio content between two or more sources (video-video/audio-audio content comparison).
Input signals required for fingerprint comparison
Fingerprint comparison mode | Minimum # of inputs required | Description of input |
Lip sync error detection | 1 REFERENCE source | a fingerprinting point where the audio/video synchronization is known to be good upstream of probe points |
1 PROBED source | a fingerprinting point where the audio/video sync is to be compared with the reference |
Video content comparison | 1 REFERENCE source | a video fingerprinting point against which a probed video source is to be compared for content integrity (match or mismatch). |
1 PROBED source | a fingerprinting point where the video sync is to be compared with the reference |
Audio content comparison | 1 REFERENCE source | an audio fingerprinting point against which a probed audio source is to be compared for content integrity (match or mismatch) |
1 PROBED source | a fingerprinting point where the audio/video sync is to be compared with the reference |
iControl allows you to designate groupings of input sources. These Comparison Groups are comprised of those signals being compared to one another. Each comparison group is a subset of the overall pool of available input sources.
Regardless of the fingerprint comparison mode you choose (lip sync, video, or audio), one of the sources in each comparison group must be designated as the Reference source. The Reference source is the source each Probed source is compared to.
In the case of lip sync error detection, the Reference source is a point where the audio/video synchronization is known to be good and that is upstream to all the Probed sources. In the cases of both the video content and audio content comparisons, the Reference source is the baseline each of the Probed sources is compared to.
NOTES: |
• A fingerprinting point can be re-used in multiple comparison groups as a reference or a probed point. |
• Fingerprinting Densité cards can be distributed among multiple Densité frames, managed by multiple Application Servers as long as there is network connectivity between the Applications Servers and the Densité frames. |
• A maximum delay of +/- 4 seconds between the reference and probed signal is tolerated. |
An Application Server, equipped with a Fingerprint Analyzer Service, can read the fingerprints of simultaneous input feeds and compare them to the reference. iControl uses the fingerprints to perform a comparison and analysis, and provides a real-time view of the results on its Status tab, in the GSM Alarm Browser, as well as in alarm widgets in iC Web, if applicable.
The maximum number of fingerprint channels recommended is a value that is hardware-dependent, specifically upon the Application Server model type and the allocated memory of the server, as follows:
[ Table ]
Maximum recommended fingerprint channels
Application Server model | Memory allocation | Maximum recommended number of fingerprint channels |
Dell PowerEdge R200 | 512MB | 150 |
1GB | 250 |
Dell PowerEdge R320 | 512MB | 150 |
1GB | 250 |
2GB | 450 |
This feature supports the following Densité cards as both probed and referenced input sources:
• ADX‑3981 (3Gbps/HD/SD 8 AES audio and Metadata de‑embedder)
• AMX‑3981 (3Gbps/HD/SD 8 AES audio and Metadata embedder)
• EAP‑3901 (3Gbps/HD/SD embedded audio and Metadata processor)
• EAP‑3101 (SD embedded audio and Metadata processor)
• HCO‑1822 (HD/SD/ASI change-over with clean switch and ALC)
• HLP‑1801 (HD/SD lip-sync probe)
• XVP‑3901 (3Gbps/HD/SD up, down, and cross converter with audio processor)
• EdgeVision
IMPORTANT: In iControl installations, the following parameters and limitations currently apply: • If you have a Dell PowerEdge R200 Application Server, iControl supports a maximum of 40 fingerprint comparisons • If you have a Dell PowerEdge R210 Application Server, iControl supports a maximum of 60 fingerprint comparisons • If you have a Dell PowerEdge R310 Application Server, iControl supports a maximum of 120 fingerprint comparisons. • If you have a Dell PowerEdge R320 Application Server, iControl supports a maximum of 200 fingerprint comparisons. • A group is composed of a reference source and 1 or more probe sources. For the purposes of counting comparisons, the reference source is not counted. • Application Servers used for comparison should be dedicated (i.e. they should not run other resource-intensive services). |
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For more information about: |
• Administrator tasks of the Fingerprint Analysis feature, click HERE. |
• Operator tasks of the Fingerprint Analysis feature, click HERE. |
• Relevant iControl user interface elements, click HERE. |
• the ADX‑3981 card, see the ADX‑3981 3Gbps/HD/SD 8 AES Audio & Metadata De-Embedder Guide to Installation and Operation (923‑99M00‑203). |
• the AMX‑3981 card, see the AMX‑3981 3Gbps/HD/SD 8 AES Audio & Metadata Embedder Guide to Installation and Operations (922‑99M00‑203). |
• the EAP‑3101 card, see the EAP‑3101 SD Embedded Audio and Metadata Processor Guide to Installation and Operations (932‑97M00‑102). |
• the EAP‑3901 card, see the EAP‑3901 3Gbps/HD/SD Embedded Audio & Metadata Processor Guide to Installation and Operations (932‑98M00‑203). |
• the HCO‑1822 card, see the HCO‑1822 HD/SD/ASI Change Over with Clean Switch and ALC Guide to Installation and Operations (955‑99M00‑100). |
• the XVP‑3901 card, see the XVP‑3901 3Gbps/HD/SD Up, Down & Cross Converter with Audio Processor Guide to Installation and Operations (886‑99M00‑320). |