Patents by Inventor Rafi Rabipour
Rafi Rabipour has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8194649Abstract: Data communication apparatus including a port and a control entity. The control entity is operative to establish a connection with a remote entity over a first path and negotiate with the remote entity using in-band signaling over the first path establishment of a second path allowing the exchange of data between the data communication apparatus and the remote entity. The invention presents advantages from the standpoint of ease of implementation and bandwidth and resource savings. The use of an in-band messaging protocol to negotiate a establishment of the second path can be implemented generally in a straight forward manner. At the same time, the ability to transfer at least part of the connection to the second path avoids the drawbacks that would arise if that part of the connection were constrained to the first path. This feature allows the operator to take advantage of benefits provided by the second path but not available to the first path.Type: GrantFiled: July 27, 2009Date of Patent: June 5, 2012Assignee: Rockstar BIDCO LP.Inventors: Rafi Rabipour, Chung Cheung C. Chu, Pierre Gendron, William Navarro, Paul Boudreaux
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Patent number: 8149698Abstract: A switch that interconnects networks provides a scheduling algorithm that determines a number of active events to be processed by a processor in the switch. The active events involve processing of bearer traffic. A schedule tailored to the number of active events is generated. In response to a change affecting the schedule, the schedule is modified. The active events are processed by the processor according to the modified schedule.Type: GrantFiled: January 9, 2007Date of Patent: April 3, 2012Assignee: Genband US LLCInventors: Chung Cheung Chu, Djordje Konforti, Rafi Rabipour, Christy Yep
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Patent number: 8116335Abstract: A data communication apparatus, comprising an interface for enabling communication with a remote entity via a network and a control entity in communication with said interface. The control entity is operative to establish a packet-switched connection with the remote entity through the network and to negotiate with the remote entity using in-band signaling entry into a codec-bypass mode of operation. In this way, a codec-bypass connection, which enhances speech quality, can be established over a packet network, which reduces bandwidth.Type: GrantFiled: November 19, 2007Date of Patent: February 14, 2012Assignee: Kapsch Carriercom France S.A.S.Inventors: Rafi Rabipour, Chung Cheung Chu, Pierre Gendron, William Navarro, Paul Boudreaux
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Patent number: 8027265Abstract: In a communications network having plural nodes, a first node receives a capability list that has a predefined format and includes plural entries identifying corresponding data processing functions supported by one or more nodes along a communications path of a communications session involving the first node. The first node adds at least one additional entry into the capability list in response to determining that the first node supports a data processing function that is not identified in the capability list.Type: GrantFiled: October 30, 2006Date of Patent: September 27, 2011Assignee: Genband US LLCInventors: Chung Cheung Chu, Rafi Rabipour
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Patent number: 7990865Abstract: The present invention provides a technique for determining which nodes are to provide various functions on traffic along a particular communication path. Generally, a communication path may include multiple nodes between which and through which traffic is routed. These nodes may include the communication terminals at either end of the communication path, as well as various types of routing nodes along the communication path. Each node will send to other nodes in the communication path information identifying the local functions it is capable of providing to the traffic carried in the communication path, and if available, remote functions capable of being provided to the traffic by other nodes in the communication path. Each node will receive from other nodes in the communication path information bearing on the remote functions. Each node will access criteria to determine whether any local functions should be applied to the traffic.Type: GrantFiled: March 21, 2005Date of Patent: August 2, 2011Assignee: Genband US LLCInventors: Chung-Cheung Chu, Rafi Rabipour, Peter Yue
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Patent number: 7916686Abstract: A media signal quality manager for controlling one or more parameters of a network node through which passes a media signal. The audio signal quality manager has an input for receiving information conveying a characteristic of the media signal and a processor that generates performance control information in response to the characteristic of the media signal. The performance control information can be conveyed to the network node for allowing the network node to adjust at least one parameter of the media signal that can influence the quality of the media signal as perceived by a user.Type: GrantFiled: February 24, 2006Date of Patent: March 29, 2011Assignee: Genband US LLCInventor: Rafi Rabipour
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Patent number: 7817678Abstract: A network entity, which comprises an input configured to receive from an upstream network entity a stream of first media data elements; an output configured to release towards a downstream network entity a stream of second media data elements; a processing engine configured to effect processing tasks on the first media data elements, thereby to generate the second media data elements, the processing tasks being effected in a set of processing intervals; and a control entity. The control entity is configured for receiving a request for a first phase adjustment from the downstream network entity; modifying the set of processing intervals in which are effected the processing tasks in an attempt to accommodate the first phase adjustment; determining a second phase adjustment based on arrival characteristics of the first media data elements and the modified set of processing intervals; and releasing towards the upstream network entity a request for the second phase adjustment.Type: GrantFiled: August 16, 2007Date of Patent: October 19, 2010Assignee: Genband US LLCInventors: Chung Cheung Chu, Rafi Rabipour
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Publication number: 20100260074Abstract: An enhanced communication bridge includes a context interface that enables the audio bridge to learn information about the type of Voice encoder, device, network connection, location, type of call (business vs. personal), identity and position of the individual, and other information about the context of the communication session itself as well as the context of each person joining the communication session. This context information is used to determine how quality of experience targets for the communication as a whole, as well as how each individual contribution should be uniquely processed to attempt to meet the quality of experience targets. Business factors may influence the decision as to the type of processing to be implemented on each of the signals provided by the participants. Corrective action may also be implemented by the bridge on the client network devices as well in the embodiment. The bridge may be centralized or distributed. A video bridge may be implemented as well.Type: ApplicationFiled: April 9, 2009Publication date: October 14, 2010Applicant: Nortel Networks LimitedInventors: Francois BLOUIN, Leigh THORPE, Tim RAHRER, Tadeusz DRWIEGA, Rafi RABIPOUR
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Publication number: 20100228543Abstract: A bandwidth extension module, and an associated method and computer-readable medium, suitable for use in artificially extending the bandwidth of a lowband speech signal. The bandwidth extension module comprises a band-pass filter configured to produce a band-pass signal from the lowband speech signal; at least one carrier frequency modulator, each carrier frequency modulator configured to pitch-synchronously modulate the band-pass signal about a respective carrier frequency, the at least one carrier frequency modulator collectively producing a highband speech signal component; a synthesis filter configured to determine a highband speech signal based on the highband speech signal component; and a summation module configured to combine the lowband speech signal with the highband speech signal to obtain a bandwidth-extended speech signal.Type: ApplicationFiled: May 21, 2010Publication date: September 9, 2010Inventors: Peter Kabal, Rafi Rabipour, Yasheng Qian
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Patent number: 7734462Abstract: A bandwidth extension module, and an associated method and computer-readable medium, suitable for use in artificially extending the bandwidth of a lowband speech signal. The bandwidth extension module comprises a band-pass filter configured to produce a band-pass signal from the lowband speech signal; at least one carrier frequency modulator, each carrier frequency modulator configured to pitch-synchronously modulate the band-pass signal about a respective carrier frequency, the at least one carrier frequency modulator collectively producing a highband speech signal component; a synthesis filter configured to determine a highband speech signal based on the highband speech signal component; and a summation module configured to combine the lowband speech signal with the highband speech signal to obtain a bandwidth-extended speech signal.Type: GrantFiled: September 1, 2006Date of Patent: June 8, 2010Assignee: Nortel Networks LimitedInventors: Peter Kabal, Rafi Rabipour, Yasheng Qian
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Publication number: 20100104091Abstract: The present invention provides for echo cancellation circuitry and variable rate encoding circuitry to cooperate with one another to effectively provide comfort noise in an effective and efficient manner. The echo cancellation circuitry will use far-end signals to generate estimated echo signals, which correspond to the actual echo signals appearing in near-end signals. The estimated echo signals are essentially subtracted from the near-end signals in an effort to remove the actual echo signals from the near-end signals. The echo cancellation circuitry will monitor any residual echo signals in the resulting processed near-end signals and provide residual echo control signals that are indicative of whether the residual echo signals should be replaced with comfort noise. The residual echo control signals are used at least in part by the variable rate encoding circuitry to determine the encoding rate to use for encoding different portions of the processed near-end signals.Type: ApplicationFiled: October 27, 2008Publication date: April 29, 2010Applicant: Nortel Networks LimitedInventors: Peter Yue, Rafi Rabipour
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Publication number: 20100039949Abstract: Data communication apparatus including a port and a control entity. The control entity is operative to establish a connection with a remote entity over a first path and negotiate with the remote entity using in-band signaling over the first path establishment of a second path allowing the exchange of data between the data communication apparatus and the remote entity. The invention presents advantages from the standpoint of ease of implementation and bandwidth and resource savings. The use of an in-band messaging protocol to negotiate a establishment of the second path can be implemented generally in a straight forward manner. At the same time, the ability to transfer at least part of the connection to the second path avoids the drawbacks that would arise if that part of the connection were constrained to the first path. This feature allows the operator to take advantage of benefits provided by the second path but not available to the first path.Type: ApplicationFiled: July 27, 2009Publication date: February 18, 2010Applicant: Nortel Networks LimitedInventors: Rafi Rabipour, Chung Cheung C. Chu, Pierre Gendron, William Navarro, Paul Boudreaux
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Patent number: 7639601Abstract: Data communication apparatus including a port and a control entity. The control entity is operative to establish a connection with a remote entity over a first path and negotiate with the remote entity using in-band signaling over the first path establishment of a second path allowing the exchange of data between the data communication apparatus and the remote entity. The invention presents advantages from the standpoint of ease of implementation and bandwidth and resource savings. The use of an in-band messaging protocol to negotiate a establishment of the second path can be implemented generally in a straight forward manner. At the same time, the ability to transfer at least part of the connection to the second path avoids the drawbacks that would arise if that part of the connection were constrained to the first path. This feature allows the operator to take advantage of benefits provided by the second path but not available to the first path.Type: GrantFiled: September 6, 2002Date of Patent: December 29, 2009Assignee: Nortel Networks LimitedInventors: Rafi Rabipour, Chung Cheung C. Chu, Pierre Gendron, William Navarro, Paul Boudreaux
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Publication number: 20090046698Abstract: A network entity, which comprises an input configured to receive from an upstream network entity a stream of first media data elements; an output configured to release towards a downstream network entity a stream of second media data elements; a processing engine configured to effect processing tasks on the first media data elements, thereby to generate the second media data elements, the processing tasks being effected in a set of processing intervals; and a control entity. The control entity is configured for receiving a request for a first phase adjustment from the downstream network entity; modifying the set of processing intervals in which are effected the processing tasks in an attempt to accommodate the first phase adjustment; determining a second phase adjustment based on arrival characteristics of the first media data elements and the modified set of processing intervals; and releasing towards the upstream network entity a request for the second phase adjustment.Type: ApplicationFiled: August 16, 2007Publication date: February 19, 2009Inventors: Chung Cheung CHU, Rafi Rabipour
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Publication number: 20080240079Abstract: The present invention provides a technique for determining which nodes are to provide various functions on traffic along a particular communication path. Generally, a communication path may include multiple nodes between which and through which traffic is routed. These nodes may include the communication terminals at either end of the communication path, as well as various types of routing nodes along the communication path. Each node will send to other nodes in the communication path information identifying the local functions it is capable of providing to the traffic carried in the communication path, and if available, remote functions capable of being provided to the traffic by other nodes in the communication path. Each node will receive from other nodes in the communication path information bearing on the remote functions. Each node will access criteria to determine whether any local functions should be applied to the traffic.Type: ApplicationFiled: March 21, 2005Publication date: October 2, 2008Applicant: NORTEL NETWORKS LIMITEDInventors: Chung-Cheung Chu, Rafi Rabipour, Peter Yue
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Publication number: 20080069090Abstract: A data communication apparatus, comprising an interface for enabling communication with a remote entity via a network and a control entity in communication with said interface. The control entity is operative to establish a packet-switched connection with the remote entity through the network and to negotiate with the remote entity using in-band signaling entry into a codec-bypass mode of operation. In this way, a codec-bypass connection, which enhances speech quality, can be established over a packet network, which reduces bandwidth.Type: ApplicationFiled: November 19, 2007Publication date: March 20, 2008Inventors: Rafi Rabipour, Chung Chu, Pierre Gendron, William Navarro, Paul Boudreaux
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Publication number: 20070201485Abstract: A media signal quality manager for controlling one or more parameters of a network node through which passes a media signal. The audio signal quality manager has an input for receiving information conveying a characteristic of the media signal and a processor that generates performance control information in response to the characteristic of the media signal. The performance control information can be conveyed to the network node for allowing the network node to adjust at least one parameter of the media signal that can influence the quality of the media signal as perceived by a user.Type: ApplicationFiled: February 24, 2006Publication date: August 30, 2007Inventor: Rafi Rabipour
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Publication number: 20070104114Abstract: In a communications network having plural nodes, a first node receives a capability list that has a predefined format and includes plural entries identifying corresponding data processing functions supported by one or more nodes along a communications path of a communications session involving the first node. The first node adds at least one additional entry into the capability list in response to determining that the first node supports a data processing function that is not identified in the capability list.Type: ApplicationFiled: October 30, 2006Publication date: May 10, 2007Applicant: Nortel Networks LimitedInventors: Chung Chu, Rafi Rabipour
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Patent number: 7203226Abstract: A communication apparatus having a communication interface for communicating with a first remote entity, the first remote entity including a decoder capable of decoding data encoded according to a first encoding format. The communication apparatus includes a control entity operative to detect an attempt by a second remote entity to establish a TFO connection with the communication apparatus via the communication interface, for sending to the first remote entity, via the communication apparatus data encoded according to a second encoding format, different from the first encoding format, where the decoder at the first remote entity is incompatible with data encoded according to the second encoding format.Type: GrantFiled: November 14, 2002Date of Patent: April 10, 2007Assignee: Nortel Networks LimitedInventors: Rafi Rabipour, David Brombal, Chung Cheung C. Chu
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Publication number: 20070067163Abstract: A bandwidth extension module, and an associated method and computer-readable medium, suitable for use in artificially extending the bandwidth of a lowband speech signal. The bandwidth extension module comprises a band-pass filter configured to produce a band-pass signal from the lowband speech signal; at least one carrier frequency modulator, each carrier frequency modulator configured to pitch-synchronously modulate the band-pass signal about a respective carrier frequency, the at least one carrier frequency modulator collectively producing a highband speech signal component; a synthesis filter configured to determine a highband speech signal based on the highband speech signal component; and a summation module configured to combine the lowband speech signal with the highband speech signal to obtain a bandwidth-extended speech signal.Type: ApplicationFiled: September 1, 2006Publication date: March 22, 2007Inventors: Peter Kabal, Rafi Rabipour, Yasheng Qian