| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 348193000 | Signal to noise ratio | 8 |
| 20080198234 | Video Signal Loss Detection - Faults resulting in reception of a still, but unknown, frame are recognised by comparing each received frame of the video signal with its predecessor, incrementing a counter in the event that the difference between the frames falls below a threshold; and generating an alarm signal in the event that the count of the counter exceeds a predetermined count. Other types of fault such as loss of signal (i.e. reception of just noise) are recognised by incrementing the counter whenever the difference exceeds a threshold. Similar results may be obtained by instead the monitoring quantisation step size and/or number of transmitted bits of a digitally coded signal, and noting that it falls below, or exceeds, a threshold. A preferred option is to compute a complexity measure, being a monotonically increasing function (e.g the product) of the quantisation step size and of the number of coded bits and compare this with the threshold value. Faults occasioned by receipt of a particular fixed image instead of the wanted picture are recognised by comparing each frame of the video signal with the fixed image, and generating an alarm signal in the event that the difference between the frames consistently falls below a threshold. | 08-21-2008 |
| 20100007742 | HIGH FREQUENCY RECEIVER AND HIGH FREQUENCY DEVICE USING THE SAME - A high frequency receiver cancels a plurality of noise signals which are contained in a high frequency signal and outputted from a plurality of noise signal sources. The high frequency receiver cancels the noise signals using a plurality of pick-up noise signals extracted from a plurality of pick-up antennas disposed near the noise signal sources. At least one of the pick-up noise signals is selected in descending order of their effects on the degradation of reception quality, thereby completing noise cancelling in a short time. | 01-14-2010 |
| 20100171838 | METHOD AND APPARATUS FOR EVALUATING INTERFERENCE BETWEEN DIGITAL TV BROADCASTING SYSTEM USING 8-VSB MODULATION METHOD AND COGNITIVE RADIO SYSTEM USING ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS - A apparatus for evaluating interference of a cognitive radio transmission signal with digital TV broadcasting includes a cognitive radio transmission unit generating and transmitting an interference signal using orthogonal frequency division multiple access (OFDMA), a broadcast transmission unit generating and transmitting a baseband digital TV broadcast signal containing data about a program to be broadcast, and a broadcast receiving evaluation unit evaluating a signal interference on the digital TV broadcast signal due to the interference signal from a signal combining a broadcast signal that the broadcast transmission unit transmits and the interference signal that the cognitive radio transmission unit transmits, by the signal interference. | 07-08-2010 |
| 20110007168 | Image receiving apparatus, image receiving method, and image transmitting apparatus - An image receiving apparatus includes: an image data receiver which receives image data wirelessly transmitted from an external apparatus; and a transmission path state detector which detects a state of a wireless transmission path on the basis of a degree of deviation from an average value of pixel data of pixels in a time direction in a still image region of the image data received by the image data receiver. | 01-13-2011 |
| 20110122258 | TELEVISION BROADCAST RECEIVING APPARATUS, CONTROL METHOD AND CONTROL PROGRAM FOR TELEVISION BROADCAST RECEIVING APPARATUS, AND RECORDING MEDIUM HAVING THE CONTROL PROGRAM RECORDED THEREON - A television broadcast receiving apparatus can change an oscillation frequency of a local oscillation signal or a tuning frequency of an intermediate frequency signal in a reception channel, and changes the reception characteristic to an optimum reception characteristic. In this way, the television broadcast receiving apparatus effectively reduces SN ratio deterioration due to interference of the outside of a reception band such as adjacent channel interference. | 05-26-2011 |
| 20120069196 | METHOD AND APPARATUS FOR SAVING POWER IN ATSC-M/H MOBILE DEVICES - Methods and apparatus enable ATSC-M/H mobile devices to conserve power by entering a high power state at a slot reception start time that is after the start of an ATSC M/H slot and entering a low power state at a slot reception stop time before the end of the ATSC M/H slot. Data lost due to the device being in a low power state during the time between the start time of the ATSC M/H slot and the activation time and during the time between the deactivation time and the end of the ATSC M/H slot are recovered using error correction processing. The slot receive and slot reception stop times may be based on the received signal quality. The receiver circuitry may also be deactivated when the entire payload has been received and skip reception of remaining slots. | 03-22-2012 |
| 20140240522 | APPARATUS FOR EVALUATING QUALITY OF VIDEO DATA BASED ON HYBRID TYPE AND METHOD THEREOF - The present invention provides an apparatus for evaluating video quality based on a hybrid type which, when bit stream data is received, extracts first evaluation parameters based on the received bit stream data to calculate a preliminary video quality score based on the first extracted evaluation parameters and then extracts second evaluation parameters, and calculates a final video quality score by adjusting the preliminary video quality score based on the second extracted evaluation parameters and methods thereof. | 08-28-2014 |
| 20140267789 | TRANSMISSION OF VIDEO IN WIRELESS ENVIRONMENT - A cross-layer adaptation scheme, which can be applied in a femto base station, is proposed for quality of service provisions for the scalable video streaming of high definition content in a wireless environment. Within the procedure of minimum video distortion optimization framework, the method can dynamically adopt the cross-layer parameters, which contain the video rate, payload length of a packet, the mode of modulation and coding scheme. Based on channel quality and related parameters, the proposed scheme formulates the problem of parameter selection into an optimization problem, which can be automatically solved. | 09-18-2014 |
