AfptMatchStream

The AfptMatchStream task receives audio data as a binary stream, and searches it for sections that match audio indexed in an AFP database.

The AfptMatchStream task uses templates as opposed to landmarks, which improves robustness to audio mismatches at the cost of scaleability.

Parameters

Parameter Description Required
Type The task name. Set to AfptMatchStream. Yes
AfpDb The audio fingerprint database (if it is defined in the configuration file). *
Delay The delay in updating results.  
DelDelay The amount of time (in terms of audio processed) between the last valid template hit being detected in a match, and that match being deleted.  
MinDuration The minimum duration of a section that must match before that match is considered.  
MinHits The minimum number of hits that a section of audio must generate before HPE IDOL Speech Server returns it as a match for a clip in an audio fingerprinting database.  
MinRate The minimum hit rate threshold for audio fingerprint identification.  
MinScoreAvg A threshold applied on the average template hit score, below which a candidate result is rejected.  
MinScoreRate A threshold applied to the average template hit score, divided by the length of the section matched.  
NBest The maximum number of matching AFP clips to include in the results for a section.  
Out The file to write the search results to. Yes
Pack The audio fingerprint database (if it is not defined in the configuration file). *
PackDir

The path to the directory containing the database.

*
Rnd A window size within which a random offset shift is calculated.  
TimeQ The degree of quantization to perform.  
NOTE:

The database type for template-based audio fingerprinting is fptdb (as opposed to fpdb for landmark-based audio fingerprinting).

*If the database is defined in the HPE IDOL Speech Server configuration file, you must set the AfpDb parameter. If the database is not defined, set both the Pack and PackDir parameters instead.

Example

http://localhost:13000/action=AddTask&Type=AfptMatchStream&Pack=Adverts&PackDir=C:\resources&Out=Results.ctm

This action uses port 13000 to instruct HPE IDOL Speech Server, which is located on the local machine, to use template-based matching to search the audio stream for sections that match audio indexed in the Adverts database and to write the search results to the Results.ctm file.


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