75 results about "Silent period" patented technology

In a speech training and recognition system, the current invention detects and warns the user about the similar sounding entries to vocabulary and permits entry of such confusingly similar terms which are marked along with the stored similar terms to identify the similar words. In addition, the states in similar words are weighted to apply more emphasis to the differences between similar words than the similarities of such words. Another aspect of the current invention is to use modified scoring algorithm to improve the recognition performance in the case where confusing entries were made to the vocabulary despite the warning. Yet another aspect of the current invention is to detect and warn the user about potential problems with new entries such as short words and two or more word entries with long silence periods in between words. Finally, the current invention also includes alerting the user about the dissimilarity of the multiple tokens of the same vocabulary item in the case of multiple-token training.

A system and method for locating a preferable playback start location after a winding or rewinding action in an audio playing device. In response to an adjustment of the playing location for audio content to a desired playing position, the system determines whether at least one non-speech or silent period of at least a predetermined duration exists within the vicinity of the desired playing position. If at least one such non-speech or silent period exists within the vicinity of the desired playing position, the system adjusts the playing position to fall within one of the at least one non-speech period or silent period.

In accordance with the present invention, in a case of using persistent scheduling, when detecting a transition from a talk state to a silent state, resources to be allocated during a silent state are allocated to a channel exclusive for silent period, and the resources which have been allocated to a mobile terminal during the talk spurt are released. Therefore, the useless allocation of resources can be reduced, and the throughput of the system can be improved.

To reduce power consumption and heat generation, an active idle system is proposed that monitors for an idle period and then, after a predetermined time, initiates a silent period. During the silent period data and idle frames are not transmitted. During the silent period, one or more transceiver components may be turned off or forced into some other power saving mode. The predetermined time may be any amount of time and is selected to balance network usage and power savings. Periodically during the silent period, such as at predetermined times, one or more sync or idle frames are transmitted. Received sync or idle frames are processed to maintain receiver settings, synchronization or equalizer adaptation. Restoring active data communication may occur by monitoring the channel during silent periods for a request or only during the predetermined times when sync or idle frames are sent.

When the PESQ and similar algorithms are used to measure speech quality, a particular voice call is set up to transmit only test voice signals over a communications network. This enables the test voice signals to be easily identified and provides a means of determining the amount of degradation that occurs as a result of transmission of the test voice signals. However, one problem is that in packet switched networks the transmission characteristics change with time. Thus the estimated MOS score obtained cannot be assumed to give an accurate speech quality measure for a voice call later made between the same two points. By adding test voice information to an ongoing voice call and transmitting that test voice information integrally with the ongoing voice call these problems are addressed. The test voice information is sent in packets during silent periods in the voice call such that the voice call is not affected by the test voice information. An identifier is used to identify or label the packets comprising test voice information. In the case that real-time transport protocol is used, the identifier is preferably a payload type value.

A system and method for maximizing the standby time of mobile communication devices that have WiFi or other high energy-consuming network interfaces, by predicting in real time actionable silent periods (ASPs) of the interface and shutting the interface down during these ASPs. Standby times are significantly increased, resulting in longer periods of operation before battery charging is required, while keeping minimal the probabilities of missing incoming data packets when the interface is turned off.

The invention relates to a method and device for sensing graded frequency spectra in a cognitive radio network, belonging to the field of communication technology. In order to ensure the throughput of a cognitive radio network system and improve the service experience of a cognitive user under the condition that a master user is not disturbed or only disturbed slightly, the method for sensing graded frequency spectra, which is provided by the invention, uses special subframe time slots for uplink and downlink conversion in the frame structure of a time division system to sense a low-grade frequency spectrum, and after the sensing result of the low-grade frequency spectrum is analyzed, a silent period is further adopted to sense a high-grade frequency spectrum, thereby confirming whether the master user appears or not. The technical scheme saves the cost for reporting signaling, can quickly sense the existence of the master user, reduces the false alarm probability of the master user, and further improves the throughput of the system.

A method and for optimizing bit rate throughput in a digital communication system is provided. The method includes establishing a relationship between signal to noise ratio and plural symbol rates for a particular constellation size. The method also includes determining noise power spectral density (N(f)), wherein N(f) is determined during a silent period of line probing; determining X_k(f), wherein X_k(f) is determined by turning on a remote station transmit signal, after N(f) has been measured and determining residual echo E_k(f), wherein E_k(f) is determined by turning on a central station echo canceller.

The embodiment of the invention relates to the technical field of electronic devices and discloses a motor driving signal generating method which comprises a step of acquiring an acceleration segmentsignal, a constant segment signal and an attenuation segment signal, wherein the frequencies of the constant segment signal and the attenuation segment signal are smaller than that of the accelerationsegment signal, a step of connecting the acceleration segment signal and the constant segment signal and reserving a silent period without signal output between the braking segment and the constant segment to obtain a first motor driving signal, a step of adjusting the constant segment signal parameters of the first motor driving signal according to a vibration sensing demand and splicing the attenuation segment signal to the adjusted first motor driving signal to obtain a second motor driving signal, and a step of adjusting the attenuation segment signal parameters of the second motor driving signal to obtain the second motor driving signal with the highest braking efficiency and determining the second motor driving signal with the highest braking efficiency as a final motor driving signal. A low-frequency heavy tactile effect can be achieved when the motor vibration is controlled, and the fidelity of a specific tactile effect in scenes such as game and car central control screens isimproved.

In some embodiments, a silent proactive handoff is performed wherein a mobile device that is using a current network to transport its application traffic uses its silent periods to connect to at least one target network temporarily and uses this temporary connectivity to perform actions needed for handoff into the target network. Among other things, with such a silent proactive handoff approach, e.g., if handoff actions to a target network fail during silent periods, there can still be essentially no impact on the applications.

The embodiment of the invention discloses a frequency spectrum sensing method and device of a cognitive radio system. According to the technical scheme, a cognitive radio cell obtains a scheme for dividing a frequency band resource into a plurality of sub frequency bands and a corresponding silent period time frequency pattern, when the cognitive radio cell is silenced on the sub frequency band where the cognitive radio cell works according to the silent period time positions of all sub frequency bands defined by the silent period time frequency pattern, plectrum sensing of corresponding sub frequency bands is achieved, and therefore under a multi-cell network environment, a plurality of cells use a uniform silent period time frequency pattern and a frequency spectrum sensing strategy, frequency spectrum sensing can be effectively prevented from being interfered by the cell or other adjacent cells under the condition of multiple cells, moreover, through dividing of the sub frequency bands and silencing and frequency spectrum sensing on the sub frequency bands, the number of silent periods needed by the frequency spectrum sensing can be effectively lowered, and handling capacity of the cognitive radio frequency spectrum sensing system is improved.

The present invention proposes a method for scheduling resource in a packet network and a network element for exchanging signaling with user equipments, wherein user equipments communicate therebetween using the resource allocated by network elements, said communication comprises talk-spurt periods during which data packets are transmitted and silent periods during which silence descriptor packets are transmitted, said method for scheduling resource comprising: said network element allocates resource for said user equipments for communication; both said user equipment and said network element detect the presence of said silence descriptor packet, and said network element determines the optimized number of resource unit(s) to be allocated to said user equipment during the interval for transmitting said data packet, based on the coding rate of said user equipment, the selected modulation coding scheme and the valid transmission times; the network element starts timing and the user equipment stops using the allocated resource if a silence descriptor packet is detected; when the timing finishes or a request for allocating resource is received from the user equipment before the end of said timing, said network element allocates the determined optimized number of resource unit(s) to said user equipment, and said user equipment begins to use said determined optimized number of resource unit(s); said network element determines the end of the interval for transmitting said data packet by detecting the silence descriptor packet; and when both said user equipment and said network element detect a silence descriptor packet, said user equipment stops using said determined optimized number of resource unit(s), while said network element releases said determined optimized number of resource unit(s).

Described herein is a silent period method and apparatus for dynamic spectrum management. The methods include configuration and coordination of silent periods across an aggregated channel in a wireless communication system. A silent period management entity (SPME) dynamically determines silent period schedules for channels based on system and device information and assigns a silent period duration and periodicity for each silent period. The SPME may reconfigure the silent period schedule based on system delay, system throughput, channel quality or channel management events. A silent period interpretation entity (SPIE) receives and implements the silent period schedule. The silent periods for the channels may be synchronized, independent, or set-synchronized. Interfaces for communicating between the SPME, SPIE, a channel management function, a medium access control (MAC) quality of service (QoS) entity, a sensing/capabilities database, a MAC layer management entity (MLME) and a wireless receive/transmit unit (WTRU) MLME are described herein.

A method for use in a Dynamic Spectrum Manager (DSM) for coordinating asynchronous silent periods in a network, the method comprising detecting a primary user in the network, transmitting a Silent Period Start Control Message to one or more cognitive radio (CR) nodes in the network, wherein the message indicates the start and duration of a silent period and initiates spectrum sensing,receiving a Measurement Report Control Message from the one or more CR nodes in the network indicating results of spectrum sensing, and transmitting a message to the one or more CR nodes, wherein the message instructs the one or more CR nodes to move to a different frequency based on the spectrum sensing results.

A system and method (600) of communication by a wireless device (200) operating according to a first communication protocol in at least a first set of frequency bands (320), provides a silent period for detecting the presence of a second wireless device operating according to a second communication protocol in a second set of frequency bands (310) that at least partially overlaps the first set of frequency bands (320).

A system and method for reducing anxiety of a patient during medical scanning in a medical scanner which may produce significant levels of acoustic noise. A processor or control unit (CU) receives a measure of variation (ESN) in a parameter of the scanner noise (SN) during the medical scanning, e.g. estimated scanner noise level based on the actual type of scanning. The processor then generates outputs (A1, V1) to audio and video playback units (AS, VS) that accordingly present an audio-video scenery (A, V) to the patient during the scanning, in accordance with the measure of variation (ESN) in the parameter of the scanner noise (SN). An image object, e.g. a moving image object, in the video imagery (V) is linked to the audio signal (A), so as to distract the patient's attention away from the scanner noise (SN). The audio-video scenery (A, V) may be switched according to an estimated scanner noise level, e.g. a switch between two different scenes: one for noisy scanning periods, and another one for silent periods. An effective distraction of the patient is obtained with a limited audio signal (A) level which is far lower than the scanner noise (SN).

A method of wireless communication includes configuring a virtual SRS (sounding reference signal) transmission to prompt user equipment (UE) to use a shortened uplink transmission format to create a silent period at an end of subframe. Reports are received from the UE indicating interference observed during the silent period.

The embodiment of the invention provides a terminal wake-up method and device and wireless access equipment. The terminal wake-up method includes the steps of determining a silent period longer than an obtained monitoring interval of a wireless terminal if it is determined that the duration of the wireless terminal in a sleep state is longer than or equal to a first preset duration; when it is determined that the wireless terminal wakes up a monitoring beacon frame but does not cache data messages sent to the wireless terminal, sending information in the silent period to the wireless terminalto inform that the time interval for waking up the monitoring beacon frame next time is equal to the silent period. By means of the scheme, the power saving efficiency of the terminal equipment can beimproved.

RFID tag responses are detected by an RFID reader system. The tag response may be detected based on a reference measurement during a tag silent period and another one during the tag response. This helps determine whether a slot is empty or occupied, in a slotted aloha algorithm. The result is reported to the Q-algorithm for a better decision.