76 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 Xk(f), wherein Xk(f) is determined by turning on a remote station transmit signal, after N(f) has been measured and determining residual echo Ek(f), wherein Ek(f) is determined by turning on a central station echo canceller.

The first data flow is buffered at a receiver, and the buffer contents are scanned for metadata. Where metadata are found indicating a second data flow which has not yet arrived, the system enters a stalling phase during which the length of any silent periods in the first data flow are stretched. As the point in the first data flow at which the second data flow is necessary gets closer, the factor by which silent periods are stretched increases exponentially. Once the expected second data flow in fact arrives, playback of two data flows is accelerated by compressing silent periods so as to clear the backlog of additional data that built up in the buffer during the stalling phase.

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.

The invention discloses wireless communication indoor coverage equipment and an interference avoidance / coordination method thereof. The equipment of the invention consists of an access unit, a firewall, an equipment identification unit, a basic configuration information storage unit, a user operation unit, an interference avoidance / coordination processing unit, an interference intensity indicating unit, an intermediate frequency / base band processing subsystem, a radio-frequency subsystem and an antenna feeder subsystem. The method of the invention provides two schemes according to the difference of the acquired scheduling information for solving the interference problem under a complex scene. The first scheme comprises the following steps: acquiring macro cell resource distribution information, detecting and judging whether the periphery has the same equipment, detecting and distinguishing interference sources by using a silent period, and periodically detecting the available resources. The second scheme comprises the step of periodically detecting the available resources by using resource distribution information periods of the adjacent same equipment. The equipment and the method can self-perceive and self-configure a complex electromagnetic environment by reasonably utilizing the scheduling information and fully complexing frequency spectrum resources to form a high-speed indoor coverage network capable of effectively avoiding the interference problem.

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.

An audio signal processing system includes: a receiving section which receives a plurality of audio signals, a process period specifying section which specifies a silent period in other audio signals except a particular audio signal that are received by the receiving section, respectively, a sound volume level adjusting section which decreases a sound volume level of the particular audio signal, in a period specified by the process period specifying section as a silent period in any of the other audio signals, and an outputting section which outputs the particular audio signal whose sound volume level is adjusted by the sound volume level adjusting section.

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).

The invention discloses a frequency spectrum sensing method and system. The frequency spectrum sensing method includes that a cognitive radio system receives signals at a silent period or a plurality of discrete silent periods and processes the received signals to obtain baseband signals; and the cognitive radio system obtains detecting statistics according to the baseband signals and confirms a frequency spectrum sensing result according to the detecting statistics. In the embodiment of the invention, the frequency spectrum sensing method has the advantages of being capable of obtaining stable detecting performance under certain interference environment and high in the detecting performance; capable of completing frequency spectrum sensing in a short time to save the time consumption of detection; and capable of completing the detection of the frequency spectrum sensing at the plurality of discrete silent periods to be flexibly applied to various cognitive radio systems.

The invention discloses a receiver system and receiving method with the cognitive function. A radio frequency front end module is connected with a digital circuit module through an analog-digital conversion module. A radio frequency preselecting filter with the tuned bandwidth and under digital control is introduced to the radio frequency front end so that mirror image and harmonic interference can be effectively avoided and control can be convenient. Meanwhile, spectrum sensing and cognitive user data receiving are combined into a whole, a feature detection algorithm based on cyclic prefix correlation is adopted, spectrum sensing and data receiving can be conducted at the same time, intervention of signals of a main user can be found in time, a silent period is avoided, and communication efficiency is improved. In addition, idle channels can be provided for cognitive users and the current idle channels are continuously monitored. Under the condition that a local oscillator is not changed, spectrum sensing is conducted on other channels in an XMHZ and spare channels are provided. When the main user occupies an authorized frequency band again, the idle channels can be dynamically and intelligently switched in real time.

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.

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 method for obtaining parameters of silent period. The method is characterized in that the method comprises the following steps: according to the current silent period parameters and expected silent period parameters adjusting the survival time value of the silent period parameters corresponding to the current silent period parameters; when the adjusted survival time value of the silent period parameters reach the expected activation value, setting the current silent period parameters as the expected silent period parameters and setting the survival time value of the silent period parameters as the original value. By using the invention, all base stations can adjust downward the silent period parameters according to different needs of base stations so as to finally realize that the silent period synchronous parameters of base stations in the same network can be adjusted downward.

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).

The present invention discloses the detection and switching method of channels. The method includes two steps; firstly, in the silent period of a system, a base station detects a channel waiting for being detected; secondly, when the channel waiting for being detected is determined to be idle, the operation of the base station is switched to the channel waiting for being detected. The present invention also discloses the base station and the detection and switching system of channels, and wherein, the base station of the system includes a channel detection module and a channel switching module; the channel detection module is used to detect the channel waiting for being detected in the silent period of the system, when the channel waiting for being detected is determined to be idle, the channel detection module sends a channel switching instruction carrying the identifier information of the channel waiting for being detected to the channel switching module; after the channel switching module receives the channel switching instruction, according to the channel identifier information carried by the instruction, the base station is switched to the idle channel waiting for being detected. By utilizing the detection and switching method of channels, the base station and the system which are provided by the present invention, the base station can be switched to the idle channel in the process of operation after accessing a network, thus increasing the utilization rate of system resources.

The embodiment of the invention provides a silent period synchronization method and a device. The method comprises the following steps of: acquiring silent period configuration of a public control channel coverage region, wherein same perception frequency points in the silent period configuration are with the same silent period configuration; and broadcasting silent period configuration information to the public control channel coverage region according to the silent period configuration, wherein the silent period configuration information is used for ensuring equipment which is with the same perception frequency points in the public control channel coverage region to carry out the same silent period configuration, and the silent period configuration information comprises the perception frequency points, the silent period cycle of the perception frequency points, an silent period offset and a silent period duration time. According to the embodiment of the invention, the problem of silent period non-synchronization among the traditional cognitive cells is solved and the frequency spectrum utilization rate is increased.

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.

A method, algorithm, architecture, circuits, and / or systems for EAS, HF, UHF, and RFID designs suitable for multi-tag read applications using TTF anti-collision schemes are disclosed. In one embodiment, a tag for wirelessly communicating with a reader can include: (i) a memory portion with an identifier, the memory having at least one printed layer; and (ii) a circuit for providing a bit string followed by a predetermined silent period, where the bit string is related to the identifier. The tag can include pre-programmed memory bits (e.g., bits the value of which is programmed by printing), or alternatively, memory bits formed by conventional photolithography, but having connections made using printing technology to form the identifier, for example.