Dialogic Networks (Israel) Ltd.

Veraz Networks Ltd.

Eci Telecom Ltd.

Amir Ilan

Meir Agassy

Oleg Litvak

David Matas

David Vinter

Alfi Gavish

Joseph Shapiro

Nimrod Aharonovitch

A method and device for reducing delays of communication packets that comprise: providing a plurality of data frames belonging to different communication sessions conveyed along respective communication channels; providing protection data for protecting at least one of these data packets; and multiplexing one or more of the data frames into a second communication packet. This second communication packet comprises protection data for protecting at least one first data frame that had already been transmitted in a first communication packet that preceded the transmission of the second communication packet; the protection data is attached to a second data frame comprised in that second communication packet; the protection data is operative to protect a first data frame comprised in the first communication packet; and wherein each of the first and second data frames belongs to a different communication session.

Method and apparatus for reducing delays in a packets switched network

A compression method applies a selection rule to input symbols and generates a reduced partial set of symbols. The partial set is checked against a dictionary-index for a match. A match identifies a range of matching symbols in a dictionary. The length of the matching range is iteratively increased by checking previous and next symbols in the input data and the dictionary until a matching range length meets a threshold limit or the length of the matching range cannot be increased further. Compressed data corresponding to the input symbols is provided where input symbols are copied over and symbols in a matched range of data are replaced with a representation of their corresponding start location and length in the dictionary.

Method and apparatus for compressing data-carrying signals

The present invention is a method of sending compressed data includes providing a plurality of M compressing devices, each compressing device configured to apply a lossless compression algorithm and dividing uncompressed data into a first plurality of sequential segments S of uncompressed data. Each segment Si of a first N sequential segments of uncompressed data, for i=1 to N, where M &#x3e;N, is applied to a respective compressing device CDi, and N respective compressed blocks Bi, each block Bi having a respective characteristic transmission time BlockDurationi.

Method and apparatus for compressing communication packets

Method and device are provided for processing a packet conveyed in a packet switched communication network. By the invention, a processing indication is associated with the packet, where the indication is adapted to provide instruction(s) for the processing of the packet, and the indication is determined in accordance with the payload carried by that packet.

Processing of packets including processing instructions and forwarded in  communication networks

A method and devices using that method are provided for reconstructing an encoded signal conveyed along a communication path in a packet switched network. The method comprises the steps of providing a communication signal that has been encoded into a plurality of frames; determining which of the plurality of frames is an essential frame, which loss would cause a relatively substantial deterioration in the quality of at least one proceeding frame upon decoding that at least one proceeding frame; packaging the plurality of frames into a plurality of packets, and identifying which of the packets comprise at least one essential frame; adding protecting information to at least one packet which proceeds a packet identified as a packet carrying at least one essential frame.

Method and devices for providing protection in packet switched communications networks

A method and apparatus are provided for managing varying traffic loads in a packetized communication network. At a predefined location, the instantaneous demand for bandwidth required for delivering traffic via a plurality of active channels is compared with the available bandwidth. When the available bandwidth at that pre-defined location is less than the bandwidth required to convey the signals carried along all these active channels, a rate adjusting mechanism is applied to at least one of the active channels, while repeating this check periodically. The rate adjusting mechanism is applied on packetized signals arriving along at least one group of active channels so as to ensure that: a substantially equalized signal quality is maintained for signals delivered via all of the active channels belonging to certain one or more groups of active channels, and the instantaneous overall bandwidth required to convey all the signals arriving at the pre-defined location, is not more than the available instantaneous bandwidth.

Method and device for quality management in communication networks

A method is provided for use with a telecommunication relay device adapted to convey voice-band data signals over a given transmission path in a telecommunication network, which relay comprises a transmitter operative to encode and transmit voice-band data information, and a receiver operative to receive and decode said information and regenerate a voice-band data signal therefrom. The method that is provided comprises handling an echo associated with the regenerated signal and returned from the telecommunication network, in order to prevent it from being relayed backwards, thus impairing the voice-band data call process. The method comprises detecting and identifying the returned echo as such, and preventing it from being relayed.

Method and device for handling echo in a communication network

A method and system for reducing prediction error impulses using a gain average calculator, an impulse detector, a signal classifier decision means and a gain compensator wherein the compensated scaling of a quantizer is determined in a process of encoding/decoding a VBD type transmission by using a vectorial linear non-adaptive predicting type algorithm.

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Hod Hasharon, Israel

Amir Ilan