The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 27, 2012
Filed:
Dec. 14, 2007
Marco Mellia, Turin, IT;
Dario Rossi, Turin, IT;
Michela Meo, Turin, IT;
Massimo Perino, Ivrea, IT;
Other;
Abstract
The invention concerns a method and an apparatus for detecting vocal data flow in a packet data flow characterised by at least two measurable variables (X5Y). A distribution function (P{x 1 C}, P{y I C}) is provided of the values of each variable (X5Y) in a vocal data flow, and the values (x,y) of each variable (X,Y) are measured in order to obtain a sequence of measured values (x, y) on a number (k) of blocks. Each measured value (x, y) is therefore applied to the respective distributiion function (P{x 1 C}, P{yI C}) in order to generate a sequence of likelihood values Formula (I) from which respective average likelihood values (E [B],E[B]) are generated. The average values are processed in order to generate a reference likelihood value (B) which, when compared with a threshold likelihood value (B) enables the presence of vocal data flow in a packet data flow to be detected.