45 results about "PESQ" patented technology

When the PESQ and similar algorithms are used to measure speech quality, a particular voice call is set up to transmit only test voice signals over a communications network. This enables the test voice signals to be easily identified and provides a means of determining the amount of degradation that occurs as a result of transmission of the test voice signals. However, one problem is that in packet switched networks the transmission characteristics change with time. Thus the estimated MOS score obtained cannot be assumed to give an accurate speech quality measure for a voice call later made between the same two points. By adding test voice information to an ongoing voice call and transmitting that test voice information integrally with the ongoing voice call these problems are addressed. The test voice information is sent in packets during silent periods in the voice call such that the voice call is not affected by the test voice information. An identifier is used to identify or label the packets comprising test voice information. In the case that real-time transport protocol is used, the identifier is preferably a payload type value.

A system and method for testing radio coverage of a land mobile radio system. The system configuration generally employs a fixed unit, a mobile unit and the two-way radio system (not part of the invention) subject to testing. The test system and method are compatible with any land-mobile radio system (conventional, trunked, using proprietary or standards-based protocols, FDMA or TDMA) operating in any frequency band. One of three methods may be selected to perform testing at any one time: continuous testing, grid testing or receive-only testing. In the continuous and grid modes, both the talk-out and talk-in paths are measured. Test results are recorded in a computer file after being converted to a digital format, and are compared to an original “reference file” via the Perceptual Evaluation of Speech Quality (PESQ) algorithm as defined by ITU-T standard P.862. The PESQ output is then converted to a Delivered Audio Quality (DAQ) score by application of an empirical set of weighting factors to certain of the PESQ parameters.

This invention provides a method for testing phonetic quality in which, a calling terminal in a tested network segment of IP network utilizes the IP address parameters of the calling and the called end to deliver reference phonetic documents to the called terminal, the called end utilizes the IP address parameters of the calling and called ends to receive the step down phonetic document formed at the local end transferred by the tested network section finally, the reference and step down phonetic documents are used to evaluate the phonetic quality to get the load phonetic quality of the tested network section. This invention provides the test device including: a user interface module, an outboard interface module, a delivery module a receive module, a file forward module and PESQ computing module.

The invention provides a test method for objectively evaluating the voice quality of a pickup system. The test method mainly comprises the following steps of: testing sound field frequency response through a testing environment or direct calculation according to frequency response test signals; calculating an isostatic compensation function; carrying out isostatic compensation on standard test voice signals; playing the standard test voice signals treated with isostatic compensation, collecting the played voice signals through a pickup device of the pickup system to be tested so as to generate a degraded voice file; comparing the standard test voice signals with degraded voice signals to calculate PESQ value; calculating MOS-LQO value by utilizing a projected curve; and carrying out sample averaging to obtain the test result. The test method overcomes the limitation that the existing test method for objectively evaluating the voice quality can only carry out end-to-end measurement, and the test method can be used for testing the voice quality of the on-site monitoring pickup system.

The invention discloses an objective assessment method based on voice enhancement algorithm subjective assessment. The method is a new objective combination method proposed by utilizing multi-linear regression analysis based on five voice enhancement objective assessment methods as follows: PESQ, LLR, CEP, fwSNRseg and fwSNRsegVar. An objective score for assessing the quality of a voice signal, an objective score for assessing the quality of background noise and an objective score for assessing overall quality are obtained by the combinations of different weighting coefficients and five objective methods. The subjective and objective correlation coefficients of the method are superior to a plurality of other traditional objective algorithms, the standard deviation of error is lower, and the assessment of performance of the voice enhancement algorithm is easier, therefore, the invention has great practical value.

The invention provides a method for detecting whether frames drop and counting the number of the dropped frames according to number continuity by using the characteristic that an adaptation layer (AL2) of an H.324M protocol stack can carry frame numbers, and gives a method for processing video interpolated frames, audio interpolated frames and wrong frames. Alignment of a sending frame sequence and a receiving frame sequence is replaced with non-accurate alignment of a PEVQ (Perceptual Evaluation Of Video Quality) algorithm and a PESQ (Perceptual Evaluation Of Speech Quality) algorithm, the evaluation is carried out by using aligned receiving and sending speech and video frame sequences, therefore, processing speed and accuracy of the original algorithm can be greatly improved. By using the sending rate of the H.324M protocol, relevant parameters are accurately calculated and an accurate non-aligned AVI (Audio Video Interleaved) file is synthesized by sending audio and video data withfixed size by using the characteristics that the sending time can be dynamically regulated and the sending rate of the H.324M protocol can be set in advance, and audio and video synchronization evaluation and video telephone integral quality evaluation are accurately carried out by using an AVET (Advanced Video Quality Evaluation) algorithm.

The invention provides a voice sample collection method based on a network dubbing game; the method comprises the following steps: 101, a voice sample collecting node: playing a video, dubbing with video captions, allowing the user to change the original self voice on a client end, and enabling a backstage server to machine-score the original audio frequency according to PESQ objective voice quality evaluation and speech recognition; 102, voice sampling subjective evaluation node: extracting the voice sample and displaying same on a game home page, and allowing the user to audition and evaluate the displaying voice sample and select a conformity or an unconformity button; allowing the backstage to artificially audition the voice sample with more unconformity buttons selected by the user, and removing the voice sample from the sample database if the selected sample cannot indeed comply with the original text after artificial audition. An artificial field recording voice sample scheme is high in recording cost and long time duration, and an artificial telephone recording scheme voice sample contains channel noises; the voice sample collection method can solve said problems.

The invention belongs to the hearing aid voice quality evaluation technology field and especially relates to a hearing aid voice quality W-PESQ objective evaluation method based on gain compensation. The method comprises steps that firstly, an end point detection method is utilized to carry out alignment processing of a recorded hearing aid output voice signal and an original pure voice signal; signal interception processing on the recorded hearing aid output voice signal and the original pure voice signal after alignment processing is carried out; gain compensation of the pure voice signal without flowing through a hearing aid is carried out; a gain compensation filter is designed, gain adjustment on the original pure voice signal is carried out according to a frequency domain gain curve of the present hearing aid so as to realize fitting of a frequency domain response curve of the gain compensation filter and a gain curve of the hearing aid; lastly, objective evaluation on hearing aid voice quality is carried out through employing a W-PESQ algorithm. The method is advantaged in that a hearing disorder population is considered, the gain compensation filter is designed, through subjective verification, the method has excellent subjective and objective agreement, and great practical values are realized.

The invention provides a noise estimation method based on recursive least tracking for sound pickup devices. A recursive average technology is adopted for a smoothing factor in the invention, and during noise cross-power spectrum estimation, the smoothing factor is correspondingly adjusted according to the actual signal-to-noise ratio of each frequency point. Simulation results show that a low noise mean square estimation error and a better perceptual evaluation of speech quality (PESQ) score are obtained when the noise estimation method is applied to a speech enhancement system.

A shipborne communication monitoring system disclosed by the present invention comprises a voice signal transmitting terminal, the voice signal transmitting terminal is connected with a marine communication base station through a wireless signal, the voice signal transmitting terminal is also electrically connected with a recording module, the recording module is electrically connected with a recording file transmission module, and the recording module is used for recording voice information of the voice signal transmitting terminal. The recording file transmission module is used for sending recorded voice information to the recording file receiving end through the marine communication base station, the server and the wired network, and the recording file receiving end and the voice signal receiving end are both in telecommunication connection with the voice tester. According to the invention, the voice of the voice signal transmitting end can be recorded and sent to the recording file receiving end, the voice quality can be detected more accurately by comparing real-time voice with voice recording, detection can be carried out through a PESQ system and manual reinspection, the detection modes are diversified, and the detection result is more accurate; and a delay calculation module for calculating communication delay is also arranged, so that the delay of a communication signal can be monitored.

The invention discloses a speech enhancement quality evaluation method and device, a terminal and a storage medium, and the method comprises the steps: using a clean speech signal as an original signal, superposing different types of noises before speech enhancement to generate a noise speech signal, and generating a speech enhancement signal through speech enhancement algorithm processing; and finally, importing the clean original speech signal and the speech enhancement signal into the PESQ to obtain a speech enhancement quality evaluation score. The method can randomly simulate noise speechsignals of different scenes, and realizes more flexible and convenient speech enhancement quality evaluation in large-scale scene testing.