Avnera Corporation Patent applications |
Patent application number | Title | Published |
20160140983 | RATE CONVERTOR - Embodiments of the invention may be used to implement a rate converter that includes: 6 channels in forward (audio) path, each channel having a 24-bit signal path per channel, an End-to-end SNR of 110 dB, all within the 20 Hz to 20 KHz bandwidth. Embodiment may also be used to implement a rate converter having: 2 channels in a reverse path, such as for voice signals, 16-bit signal path per channel, an End-to-end SNR of 93 dB, all within 20 Hz to 20 KHz bandwidth. The rate converter may include sample rates such as 8, 11.025, 12, 16, 22.05, 24, 32 44.1, 48, and 96 KHz. Further, rate converters according to embodiments may include a gated clock in low-power mode to conserve power. | 05-19-2016 |
20150195646 | NOISE CANCELLATION SYSTEM - A programmable Active Noise Compensation (ANC) system for an audio input includes a parameter store structured to store a number of various filter parameters. A mode of operation is selected that represents the type of environment the ANC system is operating in—feed-forward, feed-back, or combined feed-forward and feedback. Different filter parameters are retrieved from the parameter store based on the selected mode and desired operation. Audio inputs are sampled at a relatively high sample rate that matches inputs from a feed-forward and feedback microphone that may be present in the system. Parameters and instructions may be changed in the system responsive to changing conditions of the compensation system. | 07-09-2015 |
20150193193 | GESTURE-CONTROLLED TABLETOP SPEAKER SYSTEM - A tabletop speaker system includes an amplifier, proximity and acceleration detectors, and a processor. The processor is operatively coupled to receive signals from the proximity and accelerometer detectors, and in response to the proximity and acceleration signals, activate various functions local to the tabletop speaker system to operate and control various behaviors or features of the tabletop speaker system. In this way, the tabletop speaker system can respond to user gestures for a very natural control interface. | 07-09-2015 |
20140369529 | Switched-Mode Audio Amplifier Employing Power-Supply Audio- Modulation - A device and method are disclosed for modulating a power converter based on an audio signal to directly drive a speaker with a differential audio output signal. A first modulation signal and a second modulation signal are generated based on an input audio signal so that the first and second modulation signals are complementary signals to each other. In one embodiment, a feedback signal, such as an acoustic feedback signal from the speaker, is also used to generate the first and second modulation signals. A power supply voltage is modulated with the first modulation signal to generate a first voltage signal. The power supply voltage is also modulated with the second modulation signal to generate a second voltage signal. The first and second voltage signals form a differential audio signal that is used to drive the speaker. Alternatively, the power converter can drive a speaker with a single-ended output signal. | 12-18-2014 |
20140270028 | SPDIF Clock and Data Recovery With Sample Rate Converter - A system and a technique for recovering data from an input data stream without synchronization of an input sampling circuit to the input data stream determines a count of incoming samples (or frames) without generating a signal that is frequency-locked to the input data stream. A first clock is generated comprising a frequency that is greater than or equal to an expected frequency of the input data stream. A sample count is incremented in response to a sample received in the input data stream, and is decremented in response to a second clock signal. The second clock is generated the first clock signal by passing the first clock signal if the sample count of the sample counter does not equal a predetermined sample count value and by blocking the first clock signal if the sample count equals the predetermined sample count value. | 09-18-2014 |
20140219490 | ACOUSTIC LAYER IN MEDIA DEVICE PROVIDING ENHANCED AUDIO PERFORMANCE - An acoustic layer is added to a laptop-type personal computing device, comprising: enclosing walls, optionally—one or more microphones, a signal processing device, at least one audio transducer, and an acoustic waveguide. The acoustic layer adjoins one or more internal areas of a laptop-type device. The signal processing device receives an internal signal from a laptop-type device. The signal processing device provides a directive sound enhancement of the audio input signals based on room acoustics, such as reverberation, echo, noise, delay, frequency response, and/or speaker-positional information that is determined by the signal processing device. The audio transducer device generates an audible audio output in response to an audio signal output from the signal processing device. The acoustic waveguide receives the audible audio output and generates an enhanced bass audio output from the acoustic waveguide. | 08-07-2014 |
20140195716 | Method And Apparatus For Dynamically Allocating Memory Address Space Between Physical Memories - A memory address space for each of a plurality of physical memories in a microprocessor-based system is allocated prior to knowing the desired logical size of at least one of the physical memories. At least two of the allocated memory address spaces overlap at least a portion of each other. After the system is fabricated, a pointer value set that corresponds to an address boundary between at least two physical memories of the fabricated system is set during boot time and/or during run time when the size of the physical memories are known. The technique provides a faster time-to-market for microprocessor-based systems by allowing, for example, Application Specific Integrated Circuits (ASICs) comprising microprocessor systems on-chip be manufactured prior to the final firmware and software being fully developed. Additionally, the subject matter disclosed herein permits changes in memory-space allocation for finalized ASIC designs. | 07-10-2014 |