A system and method of communication, comprising establishing a first connection between the user equipment and a first non-public packet switched network which assigns a first non-public packet switched network address to user equipment; establishing an open signaling channel which communicates between the user equipment and a remote server through a cellular telephone network according to a public switched telephone network address associated with an International mobile subscriber identity; communicating an identification of the first non-public network and the first non-public packet switched network address over the open signaling channel to the remote server; and establishing a real time voice communication from the remote server to the user equipment through the first connection based on a call routed through the remote server to the public switched telephone network address.

Long term evolution-primary wifi (lte-pw)

Apparatus and methods for controlling a jitter buffer are described. In one embodiment, the apparatus for controlling a jitter buffer includes an inter-talkspurt delay jitter estimator for estimating an offset value of the delay of a first frame in the current talkspurt with respect to the delay of a latest anchor frame in a previous talkspurt, and a jitter buffer controller for adjusting a length of the jitter buffer based on a long term length of the jitter buffer for each frame and the offset value.

Controlling A Jitter Buffer

A device includes a de-jitter buffer configured to receive a packet, the packet including first data and second data. The first data includes a partial copy of first frame data corresponding to a first frame of a sequence of frames. The second data corresponds to a second frame of the sequence of frames. The device also includes an analyzer configured to, in response to receiving the packet, generate a first frame receive timestamp associated with the first data. The analyzer is also configured to, in response to receiving the packet, generate a second frame receive timestamp associated with the second data. The first frame receive timestamp indicates a first time that is earlier than a second time indicated by the second frame receive timestamp.

De-jitter buffer update

A jitter buffer control for controlling a provision of a decoded audio content on the basis of an input audio content is configured to select a frame-based time scaling or a sample-based time scaling in a signal-adaptive manner. An audio decoder uses such a jitter buffer control.

Jitter buffer control, audio decoder, method and computer program

Crowdsourcing is a valid approach to collect and annotate data efficiently and cost-effectively This approach permits us to reach a large and diverse pool of users that usually work from home employing their computers and headphones Still, there is insufficient information about the users' surroundings Specifically, little knowledge about the background noise to which users might be exposed to when executing crowd-work The validity of the data gathered in a disturbed environment is questionable, especially in speech quality assessment and other audio-related tasks This work presents the results of a simulated crowdsourcing study conducted in the laboratory We investigate the influence of environmental background noise in speech quality assessment tests Three groups of listeners were recruited to rate the quality of speech files under the influence of background noise at different levels Two types of noise were tested, ie, street noises and TV-Show Our findings suggest that the threshold at which an environmental background noise would significantly affect the speech quality ratings in crowdsourcing is between 43dB(A) and 50dB(A) Additionally, listeners tolerated more the TV-Show noise They provided more accurate ratings while conducting the test under the influence of higher levels of the TV-Show noise, than at lower levels of the street noise We also found that the presence of background noise does not cause a constant bias of the quality scores; instead, its impact depends on the speech degradation condition under test

Effect of Environmental Noise in Speech Quality Assessment Studies using Crowdsourcing

An audio decoder (100; 300) for providing a decoded audio information (112; 312) on the basis of an encoded audio information (110; 310) comprises an error concealment (130; 380; 500) configured to provide an error concealment audio information (132; 382; 512) for concealing a loss of an audio frame following an audio frame encoded in a frequency domain representation (322) using a time domain excitation signal (532).

Audio decoder and method for providing a decoded audio information using an error concealment based on a time domain excitation signal

The present invention concerns an encoder for coding speech-like content and/or general audio content, wherein the encoder is configured to embed, at least in some frames, parameters in a bitstream, which parameters enhance a concealment in case an original frame is lost, corrupted or delayed, and a decoder for decoding speech-like content and/or general audio content, wherein the decoder is configured to use parameters which are sent later in time to enhance a concealment in case an original frame is lost, corrupted or delayed, as well as a method for encoding and a method for decoding.

Encoder, decoder and method for encoding and decoding audio content using parameters for enhancing a concealment

An apparatus for generating an error concealment signal, comprises: an LPC representation generator (100) for generating a replacement LPC representation; a gain calculator (600) for calculating a gain information from the LPC representations; a compensator (406, 408) for compensating a gain influence of the replacement LPC representation using the gain information; and an LPC synthesizer (106, 108) for filtering codebook information using the replacement LPC representation to obtain the error concealment signal, wherein the compensator (406, 408, 900) is configured for weighting the codebook information or an LPC synthesis output signal.

Apparatus, method and corresponding computer program for generating an error concealment signal using power compensation

A time scaler for providing a time scaled version of an input audio signal is configured to compute or estimate a quality of a time scaled version of the input audio signal obtainable by a time scaling of the input audio signal. The time scaler is configured to perform the time scaling of the input audio signal in dependence on the computation or estimation of the quality of the time scaled version of the input audio signal obtainable by the time scaling. An audio decoder comprises such a time scaler.

Time scaler, audio decoder, method and a computer program using a quality control

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