Vimicro Corporation Patent applications |
Patent application number | Title | Published |
20150054858 | TECHNIQUES FOR DYNAMICALLY REGULATING DISPLAY IMAGES FOR AMBIENT VIEWING CONDITIONS - Techniques pertaining to dynamically regulating brightness of backlighting in display devices are disclosed. According to one aspect of the present invention, the brightness dynamic range of a display device is adjusted according to the current ambient viewing conditions. In order words, the original brightness dynamic range of the display image is mapped to the brightness dynamic range suitable for human eyes under the current ambient viewing conditions. The brightness of the display image is corrected according to a histogram to enhance the contrast and details of the display image, thereby a high quality displayed image can be presented under the current ambient viewing conditions. | 02-26-2015 |
20140067386 | METHOD AND SYSTEM FOR NOISE REDUCTION - A method for noise reduction is provided including: beamforming audio signals sampled by a microphone array to get a signal with an enhanced target voice and a signal with a weakened target voice; locating a target voice in the audio signal sampled by the microphone array; determining a credibility of the target voice when the target voice is located; updating an adaptive filter coefficient according to the credibility, and filtering the signal with the enhanced target voice and the signal with the weakened target voice according to the updated adaptive filter coefficient to get a signal with reduced noise; and weighing a voice presence probability by the credibility, and enhancing the signal with reduced noise according to the weighed voice presence probability. | 03-06-2014 |
20130162299 | Analog sample circuit with switch circuit - Techniques pertaining to an analog sample circuit are disclosed. One embodiment of the analog sample circuit shows characteristics of low distortion and high linearity, which can be used in many circuits including integrated circuits (IC). | 06-27-2013 |
20130148388 | AC-DC flyback converter and loop compensation method thereof - The prevent invention provides an AC-DC flyback converter and a loop compensation method thereof. The AD-DC flyback converter comprises an isolating transformer, a power switch, and a feed control module. The feed control module includes a compensating circuit, a voltage buffer, and an error amplifier having a first resistor and a second resistor, and a pulse width modulation controller. With the AC-DC flyback converter and the loop compensating method, the system stability can be improved and the loop bandwidth can be reduced. | 06-13-2013 |
20120327736 | Data sampling devices - Designs of a sampling controller working with memory chips are described. The designs enable a memory chip to work in high frequency clocks, resulting in high data throughput rate. A data sampling device includes a memory chip and a sampling controller. The sampling controller includes an asynchronous data memory. A data writing port of the asynchronous data memory receives a clock signal and employs the clock signal as a writing clock to store the sampling data into an internal memory and activate a data reading port thereof to read and output the sampling data. | 12-27-2012 |
20110137438 | Video conference system and method based on video surveillance system - A video conference system based on a surveillance system is disclosed. According to one aspect of the system, there is a surveillance system including a monitoring server and a streaming media server. A gateway is provided to for protocol conversion between a meeting terminal and the monitoring server as well as between a meeting terminal and the streaming media server to facilitate seamless transmission of signal and media streams among all meeting participants (e.g., terminal devices). In addition an audio mixing point and a video forwarding point are created for a meeting to facilitate the data exchange among all meeting participants. | 06-09-2011 |
20110096990 | Video Codec Method and System - Techniques pertaining to scalable video codec are disclosed. According to one aspect of the present invention, a video image is analyzed and a region of interest (ROI) and a region of non-interest (non-ROI) are identified. By comparing the non-ROI image with that of a previous image, a background ignored identifier is created indicating whether the non-ROI can be ignored during encoding and decoding processes. Based on the status of the background ignored identifier, the encoder encodes the images into a basic layer (BL) and an enhanced layer (EL), and transmits the coded bit streams along with the identifier to a decoder. The decoder reconstructs the image based on the identifier and the BL and the EL bit streams. | 04-28-2011 |
20100241426 | Method and system for noise reduction - Techniques pertaining to noise reduction are disclosed. According to one aspect of the present invention, noise in an audio signal is effectively reduced and a high quality of a target voice is recovered at the same time. In one embodiment, an array of microphones is used to sample the audio signal embedded with noise. The samples are processed according to a beamforming technique to get a signal with an enhanced target voice. A target voice is located in the audio signal sampled by the microphone array. A credibility of the target voice is determined when the target voice is located. The voice presence probability is weighted by the credibility. The signal with the enhanced target voice is enhanced according to the weighed voice presence probability. | 09-23-2010 |
20100232624 | Method and System for Virtual Bass Enhancement - Techniques for enhancing bass effects in an audio signal are described. According to one embodiment, an audio input signal is filtered to produce a low frequency component thereof (a low frequency signal of the audio input signal). The low frequency signal expressed in time domain is transformed to a corresponding spectrum expression in frequency domain. A fundamental frequency signal of the low frequency signal in the frequency domain is determined to generate a plurality of harmonics that are then transformed back to the time domain. Both the audio input signal (delayed) and the harmonics are synthesized to produce an audio output signal whose bass is greatly enhanced. | 09-16-2010 |