Patent application number | Description | Published |
20080311967 | Fiber optic earpiece to reduce radiation transmitted to a cell phone user - An earpiece using optical fiber shields the human brain from radio frequency radiation generated by wireless phones and similar radio devices. The disclosed device and method prevents unwanted exposure to potentially harmful radiation and provides an enhanced communication path between a cell phone and ear-piece. | 12-18-2008 |
20080312916 | Receiver Intelligibility Enhancement System - The intelligibility of speech signals is improved in the many situations where a voice signal is communicated or stored. Means and methods are disclosed for developing a scheme with high voice signal intelligibility without sacrifice of voice quality. The disclosed method comprises certain steps, including, but not limited to: Learning the noise on near-end side and enhancing the far-end voice as a function of the noise level on the near-end side. The disclosed method and apparatus are especially useful to increase the intelligibility of the cell phone's loudspeaker output. The invention includes the processing of an input speech signal to generate an enhanced intelligent signal. In frequency domain, the FFT spectrum of the speech received from the far-end is modified in accordance with the LPC spectrum of the local background noise to generate an enhanced intelligent signal. In time domain, the speech is modified in accordance with the LPC coefficients of the noise to generate an enhanced intelligent signal. | 12-18-2008 |
20090022335 | Dual Adaptive Structure for Speech Enhancement - A clear, high quality voice signal with a high signal-to-noise ratio is achieved by use of an adaptive noise reduction scheme with two microphones in close proximity. The method includes the use of two omini directional microphones in a highly directional mode, and then applying an adaptive noise cancellation algorithm to reduce the noise. | 01-22-2009 |
20100311463 | ENVIRONMENTAL NOISE REDUCTION AND CANCELLATION FOR A COMMUNICATION DEVICE INCLUDING FOR A WIRELESS AND CELLULAR TELEPHONE - Various embodiments of the present invention enable a system and method for reducing or entirely canceling background or environmental noise from a voice transmission from a communications device. A communications device, such as a mobile telephone, is configured with an environmental noise compensation, correction, or counterbalanced (correction) signal generator that is connected between at least one microphone and a continuous time quadrant multiplication. Optional discrete time or digital signal processing may be applied. The original output of the at least one microphone and a compensation, correction, or counterbalanced or counter-balancing signal generated by the environmental noise compensation, correction, or counterbalanced signal generator are mixed or otherwise combined together after being received by the antenna to the receiver. | 12-09-2010 |
20110135107 | Dual Adaptive Structure for Speech Enhancement - A clear, high quality voice signal with a high signal-to-noise ratio is achieved by use of an adaptive noise reduction scheme with two microphones in close proximity. The method includes the use of two omini directional microphones in a highly directional mode, and then applying an adaptive noise cancellation algorithm to reduce the noise. | 06-09-2011 |
20110144984 | VOICE CODER WITH TWO MICROPHONE SYSTEM AND STRATEGIC MICROPHONE PLACEMENT TO DETER OBSTRUCTION FOR A DIGITAL COMMUNICATION DEVICE - The present invention provides a voice coder for voice communication that employs a multi-microphone system as part of an improved approach to enhancing signal quality and improving the signal to noise ratio for such voice communications, where there is a special relationship between the position of a first microphone and a second microphone to provide the communication device with certain advantageous physical and acoustic properties. In addition, the communication device can have certain physical characteristics, and design features. In a two microphone arrangement, the first microphone is located in a location directed toward the speech source, while the second microphone is located in a location that provides a voice signal with significantly lower signal-to-noise ratio (SNR). | 06-16-2011 |
20110225135 | Patent Search Engine with Statistical Snapshots - A search engine finds patents, patent applications and related documents and presents a selection of found documents in textual formats and/or graphical formats. After executing a search, the displayed information may include a selection of results sorted by inventor name, year and other variables found within patent documents. Financial data pertaining to patent owning entities is presented along with patent portfolio analysis and estimates of financial worth. | 09-15-2011 |
20110274282 | Multi microphone sampling method and circuit with single ADC front end - The invention relates generally to means and methods of improving the Signal to Noise Ratio (SNR) in communication devices. In particular, means and methods of alternating microphone inputs are disclosed. Multiple microphones are used to increase the SNR in a communication device that is capable of storing the input from only one microphone at a time. By alternating the inputs from the microphones and storing the inputs, multi-channel noise reduction techniques are employed in a system similar to a single channel system. Existing sigma-delta analog to digital converters may be used to time the switching between the microphones alternately. The microphones may be switched by relays, flip-flops, transistors, or other means. As the SNR is improved, traffic in a communications network may be increased by increasing the number of users in response to the lower bandwidth required. | 11-10-2011 |