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Chen Zhang
Chen Zhang, Beijing CN
| Patent application number | Description | Published |
|---|---|---|
| 20100158269 | Method and apparatus for reducing wind noise - Techniques pertaining to techniques to reduce wind noises effectively in recorded signals are disclosed. According to one aspect of the present invention, there is a strong correlation between two voice signals from target voices in the same frequency band sampled simultaneously by a pair of microphones in a common scene while there is a weak correlation between wind noises in the same frequency band of the two voice signals sampled simultaneously by the pair of microphones in the common scene. Taking advantage of this feature to provide a larger gain to the frequency band having a strong correlation and a smaller gain to the frequency band having a weak correlation, thereby the wind noise is reduced efficiently with minimum impact on the target voices. | 06-24-2010 |
| 20100168882 | Method and Device for Switching Audio Recording Modes - Techniques pertaining to providing an appropriate recording mode to achieve optimum record data in accordance with the recording environment are described. In one embodiment, a current audio recording mode is determined is initially selected to be one of a low sensitivity audio recording mode and a high sensitivity audio recording mode. A digital gain for digital audio recoding data in the current audio recoding mode is obtained. The current audio recording mode is automatically switched between the low sensitivity audio recording mode and the high sensitivity audio recording mode when the digital gain reaches a gain threshold. | 07-01-2010 |
| 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 |
| 20100295815 | Device and Method for detecting multiple touch points - Techniques for detecting multiple touch points for touch screens are disclosed. A touch screen includes a first conductive layer and a second conductive layer, each conductive layer having a positive terminal and a negative terminal. Efficient operations of detecting multiple points on the touch screen are described using various voltage/currents differences from the positive and negative terminals of the first and second conductive layers. | 11-25-2010 |
| 20100295816 | Device and method for detecting touch screen - Techniques for detecting multiple touch points for touch screen are disclosed. A touch screen includes a first conductive layer and a second conductive layer, each conductive layer having a positive terminal and a negative terminal, an operation of detecting multiple points on a touch screen includes: coupling the positive terminal of the second conductive layer to a positive reference voltage, coupling the negative terminal of the second conductive layer to a negative reference voltage, sampling the positive terminal of the first conductive layer to obtain a series of first voltage samples V | 11-25-2010 |
Chen Zhang, Shanghai CN
| Patent application number | Description | Published |
|---|---|---|
| 20100070226 | Analysis of Chirp Frequency Response Using Arbitrary Resampling Filters - Log chirp testing where a log chirp may be provided to a device under test and a first time domain response from the device under test may be received. The first time domain response may be in the time domain. The first time domain response may be converted to the angular domain to create an angular domain response. Converting to the angular domain response may include resampling the time domain response from the time domain to the angular domain. The angular domain response may be filtered and/or analyzed. The angular domain response may be converted to a second time domain response. Similar to above, the conversion may include resampling the angular domain response from the angular domain to the time domain. The first time domain response and the second time domain response may be analyzed. Testing results of the device under test may be generated and stored based on said analyzing. | 03-18-2010 |
| 20100246676 | Method of downscale decoding MPEG-2 video - A method of downscale decoding MPEG-2 video includes an Inverse Discrete Cosine Transformation (DCT) procedure for performing a ½ horizontal downscaling to convert DCT coefficients in a 8×8 array block of the video into a 4×8 array intra-block and performing a ½ vertical downscaling to convert the intra-block into an intra-coded picture having ¼ resolution of the original; and a downscaling motion compensation procedure for performing a motion compensation to the current intra-block to obtain a predictive block having ½ horizontal size of the original, adding the predictive block with a residual block produced by the same method applied to the intra-blocks to obtain a 4×8 array inter-block, and performing a ½ vertical downscaling to the inter-block for outputting a predictive-coded picture and a bidirectional predictive-coded picture having ¼ resolution of the original, so as to simplify the complexity of the decoding computation and enhance the decoding speed. | 09-30-2010 |
Chen Zhang, Tianjing CN
| Patent application number | Description | Published |
|---|---|---|
| 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 |
Chen Zhang, Darmstadt DE
| Patent application number | Description | Published |
|---|---|---|
| 20090213219 | VISUALLY TRACKING AN OBJECT IN REAL WORLD USING 2D APPEARANCE AND MULTICUE DEPTH ESTIMATIONS - Estimating the dynamic states of a real-world object over time using a camera, two dimensional (2D) image information and a combination of different measurements of the distance between the object and the camera. The 2D image information is used to track a 2D position of the object as well as its 2D size of the appearance and change in the 2D size of the appearance of the object. In addition, the distance between the object and the camera is obtained from one or more direct depth measurements. The 2D position, the 2D size, and the depth of the object are coupled to obtain an improved estimation of three dimensional (3D) position and 3D velocity of the object. The object tracking apparatus uses the improved estimation to track real-world objects. The object tracking apparatus may be used on a moving platform such as a robot or a car with mounted cameras for a dynamic visual scene analysis. | 08-27-2009 |
Chen Zhang, Monte Sereno, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20080209309 | FACILITATING RETRIEVAL OF INFORMATION WITHIN A MESSAGING ENVIRONMENT - Techniques and mechanisms are provided that allow participants in an electronic messaging conversation (e.g. email or instant message) to retrieve information related to words and phrases in the electronic messaging conversation without leaving the electronic messaging environment. An electronic messaging environment is provided that includes user interface tools that allow a user to (1) select text within the EM conversation, (2) submit the text to an information retrieval service, such as a search engine, and (3) display the results generated by the information retrieval service. To facilitate the selection of relevant text, certain “suggested words” within the conversation may automatically be highlighted by the instant messaging client. Various techniques are provided for customizing which words are suggested, which sources are searched, and which search terms are used. | 08-28-2008 |
Chen Zhang, Frankfurt DE
| Patent application number | Description | Published |
|---|---|---|
| 20110129119 | MULTI-OBJECT TRACKING WITH A KNOWLEDGE-BASED, AUTONOMOUS ADAPTATION OF THE TRACKING MODELING LEVEL - The invention proposes a method for object and object configuration tracking based on sensory input data, the method comprising the steps of: | 06-02-2011 |