Method and apparatus for replacing lost PSTN data in a packet network
AssigneeTellabs Operations, Inc.
InventorsJohn B. Kenney, Robert B. Magill, R. Michael Schafer
Life of this patent
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Abstract
An apparatus for replacing lost PSTN data in a packet network and for generating variable power white noise, includes a lost packet detection unit (402) for detecting lost data packets, a data processing unit (404) for producing in response a lost data output indicating when replacement data needed, data playout unit (408) or data replacement unit (406), each may be implemented as a variable power white noise generator (FIG. 3) to generate replacement data by reusing data stored in an extended playback buffer, and placing the re-used replacement data on an external network.
Claims18
A method of generating replacement data for different types of communication transmitted over a communication network, the method comprising:
- detecting a communication type of a communication, wherein said communication type is one of a plurality of detectable communication types;
- adjusting at least a first value in response to said communication type, wherein said first value varies depending on said communication type;
- and
- fluctuating a plurality of registers pseudo-randomly between said first value and a second value to generate an output value;
- wherein the first value comprises a positive sign and a magnitude and wherein the second value comprise a negative sign and the magnitude and wherein the fluctuating comprises fluctuating pseudo-randomly between the positive sign and the negative sign.
Apparatus for generating replacement data for different types of communication transmitted over a communication network, the apparatus comprising:
- means for detecting a communication type of a communication, wherein said communication type is one of a plurality of detectable communication types;
- means for adjusting at least a first value in response to said detected type of communication, wherein said first value varies depending on said detected type of communication;
- and
- means for fluctuating a plurality of registers pseudo-randomly between said first value and a second value to generate an output value;
- wherein the first value comprises a positive sign and a magnitude and wherein the second value comprise a negative sign and the magnitude and wherein the means for fluctuating comprises means for fluctuating pseudo-randomly between the positive sign and the negative sign.
Apparatus for generating replacement data for different types of communication transmitted over a communication network, the apparatus comprising:
- an echo canceller arranged to detect a communication type of an incoming communication, wherein said communication type is one of a plurality of communication types detectable by said echo canceller;
- a register control arranged to adjust at least a first value in response to said communication type, wherein said first value varies depending on said communication type;
- and
- a plurality of registers arranged to fluctuate pseudo-randomly between said first value and a second value to generate an output value;
- wherein the first value comprises a positive sign and a magnitude and wherein the second value comprises a negative sign and the magnitude and wherein the registers fluctuate pseudo-randomly between the positive sign and the negative sign.
Dependencies are inferred from the claim text.