摘要:
Methods and apparatus of managing a communication system, wherein a decision regarding a level of activity at a first end is made based at least in part on the level of activity at the second end (710). In one embodiment, the energy level of a first-end audio signal is measured (700). The first end is declared voice-active if the first-end energy level is greater than or equal to a first threshold value. The first end is declared voice-inactive if the first-end energy level is less than the first threshold value. To determine the value of the first threshold value, the energy level of a second-end audio signal is measured. If the second-end energy level is greater than or equal to a second threshold value, the second end is declared voice-active, in which case the first threshold is maintained at a relatively high level. If the second-end energy level is less than the second threshold value, the second end is declared voice-inactive, in which case the first threshold is maintained at a relatively lower level.
摘要:
An efficient change to a MGW termination is made possible by means of a method for the signalling of an instruction to change the coding of a live load connection section termination at a media gateway (MGW) from a media gateway controller (MGC) to the media gateway (MGW), whereby an instruction is also signalled from the media gateway controller (MGC) to the media gateway (MGW), which causes the media gateway (MGW) to carry out a check of the connectability of terminations after receipt of several instructions for changing the coding of a termination.
摘要:
This invention relates to a method for operating a mobile phone, a mobile phone 1 for carrying out the steps of the method, an access node 14 of the internet 10 and a service center 20. The method is comprising the steps of activating of software for converting speech and control signals into VolP data signals or vice versa by said mobile phone, setting up an IP connection between said mobile phone and a terminal, being able to process VolP data signals, via nodes of the internet, transferring speech and control signals into VolP data signals by said mobile phone and transmitting said VolP data signals from said mobile phone to an access node of said nodes and/or receiving VolP data signals from said terminal via said access node by said mobile phone and transferring said VolP data signals into speech and control signals by said mobile phone, and closing said IP connection.
摘要:
Systems and methods for dynamically optimizing the fidelity of a speech signal received from a wireless telephony device and transmitted through a packet-switched network. In an exemplary embodiment, at least one Quality of Speech (QoS) transmission characteristic is determined for a packet-switched network intermediate to the a first Media Gateway (MGW) and a second MGW; the fidelity of speech transmitted through the packet-switched network being a function of the QoS transmission characteristic. A speech codec is dynamically-selected as a function of the QoS transmission characteristic of the packet-switched network. The speech signal is encoded into speech data using the dynamically-selected speech codec, and transmitted through the packet-switched network from the first MGW to the second MGW. The second MGW decodes the speech data using the dynamically-selected speech codec.
摘要:
System and method for processing communication signals in a communication system having a detector for detecting a parameter of a communication signal. A communication signal is provided to a non-linear processor (NLP) adapted to examine the signal and to decide whether or not to enter an active state based upon a parameter of the signal. If the NLP enters an active state, the NLP performs non-linear processing on the signal. The NLP communicates to the detector whether the NLP is active or inactive. If the NLP is active, a processing step of the detector is disabled.
摘要:
A system and method for provide a stable gain from an adaptive gain control device in a signal path. An echo canceller is also located in the signal path, and is used to provide performance information regarding losses in the signal. This performance information is fed to the automatic gain control device via a connection. The automatic gain control device thereafter uses the performance information to determine a maximum gain that might be provided based upon losses cause by echo conditions. The gain however is limited in order to provide for a stable system. The performance information includes a loss rate that includes a combination of the echo return loss and the echo return loss enhancement.
摘要:
The invention relates to two methods for selecting the QoS level during a connection between a first media gateway (1) which is associated with a first subscriber (2) and a first network operator (13), and a second media gateway (3) which is associated with a second subscriber (4) and possibly a second network operator (14), either in a packet network by means of an exchange by a CODEC or in a network by means of an exchange by a transmission technique. In said methods, the first subscriber (2) and/or the first network operator (13) signals to a first media gateway controller (5) that they would like another QoS. During the first method, a CODEC used in the connection is modified by means of media gateways (1, 3) and media gateway controllers (5, 6). During the second method, an IP connection (12) is deviated towards a TDM connection (7), or vice versa, by means of additional TDM endpoints (8, 9, 10, 11) and the aforementioned components. It is thus possible to adapt the QoS level to the level currently required.
摘要:
System and method for processing communication signals in a communication system having a detector for detecting a parameter of a communication signal. A communication signal is provided to a non-linear processor (NLP) adapted to examine the signal and to decide whether or not to enter an active state based upon a parameter of the signal. If the NLP enters an active state, the NLP performs non-linear processing on the signal. The NLP communicates to the detector whether the NLP is active or inactive. If the NLP is active, a processing step of the detector is disabled.
摘要:
Methods and apparatus of managing a communication system, wherein a decision regarding a level of activity at a first end is made based at least in part on the level of activity at the second end (710). In one embodiment, the energy level of a first-end audio signal is measured (700). The first end is declared voice-active if the first-end energy level is greater than or equal to a first threshold value. The first end is declared voice-inactive if the first-end energy level is less than the first threshold value. To determine the value of the first threshold value, the energy level of a second-end audio signal is measured. If the second-end energy level is greater than or equal to a second threshold value, the second end is declared voice-active, in which case the first threshold is maintained at a relatively high level. If the second-end energy level is less than the second threshold value, the second end is declared voice-inactive, in which case the first threshold is maintained at a relatively lower level.
摘要:
An adaptive multi-rate vocoder is used for the improvement of a telecommunications between two user equipment while at least one of them is an internet protocol based user equipment. The transmission quality will not only be analyzed when a telecommunications is set up but also during its running. According to that analyze and to the transmission quality required, an encoding level will be chosen. The analyze will be based mostly on the measure of the different latency to which will be subject the digital signals of that telecommunications when being transmitted in packets through at least one IP based network.