Zad-Issa
Mohammad Zad-Issa, Irvine, CA US
Patent application number | Description | Published |
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20100020986 | SINGLE-MICROPHONE WIND NOISE SUPPRESSION - A technique for suppressing non-stationary noise, such as wind noise, in an audio signal is described. In accordance with the technique, a series of frames of the audio signal is analyzed to detect whether the audio signal comprises non-stationary noise. If it is detected that the audio signal comprises non-stationary noise, a number of steps are performed. In accordance with these steps, a determination is made as to whether a frame of the audio signal comprises non-stationary noise or speech and non-stationary noise. If it is determined that the frame comprises non-stationary noise, a first filter is applied to the frame and if it is determined that the frame comprises speech and non-stationary noise, a second filter is applied to the frame. | 01-28-2010 |
20100324911 | CVSD DECODER STATE UPDATE AFTER PACKET LOSS - A system and method is described for updating the state of an audio decoder, such as a CVSD decoder, after a packet loss has occurred. In response to the loss of a packet, the system and method encodes audio samples produced by a packet loss concealment (PLC) algorithm and effectively passes the encoded audio samples through the audio decoder in lieu of the contents of the lost packet. This operation brings the state of the audio decoder into better synchronization with the state of a remote audio encoder, thereby reducing or minimizing the degrading effect of the packet loss on the perceived quality of an output audio signal produced by a voice processing system that includes the audio decoder. | 12-23-2010 |
Mohammad Reza Zad-Issa, Irvine, CA US
Patent application number | Description | Published |
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20080274705 | Automatic tuning of telephony devices - Various embodiments are disclosed relating to the automatic tuning of telephony devices. An example method comprises, determining, based on a change in an operating environment of a telephony device, that a speech enhancement algorithm of the telephony device is to be tuned. The example method further comprises, determining one or more metrics based on operation of the telephony device in the changed operating environment and providing the one or more metrics to the speech enhancement algorithm In the example method, the speech enhancement algorithm is tunable based on the one or more metrics. The example method still further comprises, tuning the speech enhancement algorithm based on the one or more metrics. | 11-06-2008 |
20100020940 | FAR-END SOUND QUALITY INDICATION FOR TELEPHONE DEVICES - A sound quality metric may be determined at a near-end telephone system, the sound quality metric associated with far-end sound quality received at a far-end telephone system. A signal adjustment may be determined, based on the sound quality metric. The signal adjustment may thus be provided at an earpiece of the near-end telephone system. In this way, a user of the near-end telephone system may be alerted that the sound quality of a far-end user is unacceptably low, so that the near-end user may take corrective action at the near end to improve the far-end sound quality. | 01-28-2010 |
Syavosh Zad-Issa, Irvine, CA US
Patent application number | Description | Published |
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20090222264 | SUB-BAND CODEC WITH NATIVE VOICE ACTIVITY DETECTION - An augmented version of a Low-Complexity Sub-band Coder (LC-SBC) is described herein that is better suited than conventional LC-SBC for wideband voice communication in the Bluetoothâ„¢ framework, where minimizing the power consumption is of paramount importance. The augmented version of LC-SBC utilizes certain techniques associated with speech coding, such as Voice Activity Detection (VAD), to reduce bandwidth usage and power consumption while maintaining voice quality. The augmented version of LC-SBC reduces the average bit rate used for transmitting wideband speech in a manner that does not add significant computational complexity. Furthermore, the augmented version of LC-SBC may advantageously be implemented in a manner that does not require any modification of the underlying logic/structure of LC-SBC. | 09-03-2009 |
20100223054 | SINGLE-MICROPHONE WIND NOISE SUPPRESSION - A technique for suppressing non-stationary noise, such as wind noise, in an audio signal is described. In accordance with the technique, a series of frames of the audio signal is analyzed to detect whether the audio signal comprises non-stationary noise. If it is detected that the audio signal comprises non-stationary noise, a number of steps are performed. In accordance with these steps, a determination is made as to whether a frame of the audio signal comprises non-stationary noise or speech and non-stationary noise. If it is determined that the frame comprises non-stationary noise, a first filter is applied to the frame and if it is determined that the frame comprises speech and non-stationary noise, a second filter is applied to the frame. | 09-02-2010 |