Abstract: A method and related apparatus for telemetry between downhole devices and surface devices. In particular, the methods and related apparatus may send a first datum of a first parameter in an uncompressed form, and send a second datum of the first parameter in compressed form.

Abstract: A method for providing wireless communication between a mobile station and a network station using a context for message compression is provided. Profile-specific information is stored persistently in a profile-specific dictionary. Communication is then provided between the mobile station and the network station using the profile-specific dictionary for message compression.

Abstract: A method, apparatus, system, and computer software for compressing and decompressing a message for transmission. The method of compressing a text message for transmission may include parsing text strings and encoding numerical values with a binary representation and analyzing values of the text strings and populating a session specific codebook with partial strings from the values.

Abstract: A system and method for detecting compression of power amplifier circuitry in a wireless terminal and, in response, reducing the output power of the power amplifier circuitry such that linear operation is achieved. In general, the output power of the power amplifier is detected to provide a detect signal. The detect signal is sampled at two predetermined points in time. A ratio of the samples of the detect signal is compared to an expected ratio. Based on the comparison, a decision is made as to whether the power amplifier circuitry is in compression. If so, an adjustable power control signal controlling the output power of the power amplifier circuitry is reduced by one power step, such that the output power of the power amplifier circuitry is reduced by one output power level. The process is repeated until the power amplifier circuitry returns to linear operation.

Abstract: A method and related apparatus for telemetry between downhole devices and surface devices. In particular, the methods and related apparatus may send a first datum of a first parameter in an uncompressed form, and send a second datum of the first parameter in compressed form.

Abstract: This invention relates to a method and device for improving the reliability and performance of cellular telephones. In particular, this invention provides a method of transmitting two signals which are substantially identical over two different cellular networks. The transmitted signals are received by a receiving device and synchronized and combined into one combined signal. The invention also discloses a cellular telephone system that is able to transmit two substantially identical signals over two different cellular networks which are received by a telephone device capable of synchronizing and combining the signals into one combined signal.

Abstract: Method and apparatus for header compression in a wireless communication system supporting broadcast transmissions. The system periodically provides a header decompression message sufficient for a receiver to decompress the header. The decompression message transmission period is determined to avoid delay in accessing a broadcast session.

Abstract: A transcoder of a switching node MSC of a core network is inserted into a connection call of a transcoder-free-operation on the basis of an answer from a switching node RNC of a radio access network against an inquiry about a setting information of transcoder performed by the switching node MSC in a user layer of a Iu interface to insert a tone signal, etc., into the connection call of transcoder-free-operation. The insertion of transcoder into a connection call of a transcoder-free-operation can be executed without performing a re-initializing procedure.

Abstract: A portable telephone apparatus usable both for telephone and hearing music is disclosed, including an antenna for holding communication with a base station or a parent unit, a voice input unit such as a microphone, a voice output unit such as a speaker, an operating unit including keys and a display unit manipulated by a user operating the apparatus, a telephone control unit for modulating a radio signal from the voice input unit and outputting the modulated signal to the antenna and demodulating the radio signal received through the antenna, extracting a voice signal and outputting the voice signal, a chargeable battery for supplying power to the apparatus, a storage unit for storing the compressed music data, a data restoration unit for reading, expanding and reproducing as a music signal the data stored in the storage unit, and a switching unit for selecting the voice signal demodulated by the telephone control unit or the music signal reproduced by the data restoration unit and outputting the selected sig

Abstract: A mobile phone or other personal communication device includes resources applying measures of an individual's hearing profile, personal choice profile, and induced hearing loss profile, separately or in combination, to build the basis of sound enhancement. A personal communication device thus comprises a transmitter/receiver coupled to a communication medium for transmitted receiving audio signals, control circuitry that controls transmission, reception and processing of call and audio signals, a speaker, and a microphone. The control circuitry includes logic applying one or more of a hearing profile of the user, a user preference related hearing, and environmental noise factors in processing the audio signals. The control circuitry may includes instruction memory and an instruction execution processor such as a digital signal processor.

Abstract: The invention discloses a portable remote device that allows the user to access the Internet and World Wide Web. The portable device connects to a cellular telephone, thus providing wireless connection to the internet via a host computer which runs a browser, that takes information received from the Internet or other sources and renders it onto a virtual display in its memory. This information is directed to software, which reduces the color depth of the information to a lower depth color image. This reduced image is then compressed and encrypted by another software and sent to the portable device of the invention, which decrypts and decompresses it for displaying to the user. The browser may also reduces the color depth and compress the image without need for further software. Thus, the user views a bit map or raster image of a Web page, which is stored into memory. The portable device further comprises methods of pointing and clicking on text and images which represent links to other pages.

Abstract: A wireless microphone having a split-band audio frequency companding system is disclosed. The companding system includes a compression circuit in which one amplification element is utilized in connection with a number of frequency bands. Each frequency band has a rectifier and filter element associated therewith. High-pass filter elements are utilized in the higher frequency bands of the compression and expander circuits to reduce the transfer of low-frequency signals to the rectifier elements that process the low-frequency signals, thereby reducing undesirable modulations of a variable resistance element associated therewith.

Abstract: The present disclosure provides a method and apparatus for communicating a base band signal via a communication channel that connects a transmitter to a receiver comprising the steps of modulating the base band signal into a low frequency deviation modulated signal, transmitting the low frequency deviation modulated signal with a transmitter, receiving the low frequency deviation modulated signal with a receiver, mixing the received signal to an intermediate frequency signal, multiplying the intermediate frequency signal by to a multiplied frequency signal, multiplying a reference signal having a frequency generally equal to the center frequency of the intermediate frequency signal by a multiple that is one greater than or one less than the multiplied frequency signal to create a reference multiplied frequency signal, subtracting the reference multiplied frequency signal from the multiplied frequency signal to generate a wide band frequency signal, and discriminating the wide band frequency signal to obtain t

Abstract: The present invention provides a charge monitor for satellites for monitoring build up of electric charge due to charge particle fluxes impinging on the satellite. In one aspect of the invention the charge monitor includes an electrically conducting housing including at least two compartments with each compartment including a dielectric slab contained therein. An electrically conducting electrode is embedded in each dielectric slab a pre-selected distance below a top surface of the dielectric slab, the housing being mountable on a satellite with the top surface of the dielectric slab facing outwardly into space away from the satellite whereby charged particles emitted from sources external to the satellite penetrate the dielectric slab resulting in charge accumulation in each electrically conducting electrode, each electrically conducting electrode being electrically isolated from all other electrically conducting electrodes in the electrically conducting housing.

Abstract: Systems and methods for improving performance of communications over a limited-bandwidth communication link by token-based compression of messages. In one embodiment, a mobile station parses an SIP/SDP message into pieces, wherein each piece comprises a static component and a variable component. The static component comprises fixed-format data and may be intermingled with the variable component. The static component is replaced by a corresponding token. In one embodiment, the token comprises a two-byte identifier. The remaining variable component may also be compressed. The compressed message is received by an SIP proxy server that can identify the static component of each piece of the SIP/SDP message from the received token. The SIP proxy server can then replace the two-byte token with the original static component, and reconstruct the message, in which parts of the static component may be intermingled with parts of the variable component.

Abstract: An apparatus and method for compressing and compressing text based messages. A TCCB layer 114, 115 is added to a mobile device 100 and P-CSCF 102. At the sending device, the TCCB compression method is invoked to remove all redundant header information contained in a message to be transmitted. When the TCCB compression method detects that a header's contents are the same as previously sent or received for a particular sequence, the TCCB method blanks the header contents. At the receiving device, when the TCCB layer receives a message with blank header contents, the TCCB decompression method is invoked to reconstruct the header from its cache 115, 127.

Abstract: In a variable rate wireless communication system, an explicit reduced-bit rate indicator is used to communicate the data rate and configuration of the transmission to the receiver. Data throughput is increased by reducing the number of bits required to indicate data rate and channel configuration. Related allocation of total transmit power, and related receive processing are conserved. Reception is enhanced by increased probability of correct decoding. Receiver performance is enhanced by reducing the probability of false erasures and associated outerloop setpoint adjustment errors when the receiver is notified of channels with zero data rates. Power consumption is reduced by using fewer bits to communicate data rate and channel configuration information, and by more accurate setpoint adjustment.

Abstract: A method and system for performing adaptive compression in a wireless communication network includes monitoring a link quality of a signal transmitted via an air interface using, for example, a telecommunications node. Next, it is determined whether the link quality deteriorates below a first link quality threshold. A compressor associated with the transmitted signal is disabled in response to a determination that the link quality has deteriorated below the first link quality threshold.

Abstract: In a dynamics compressor, an analog signal to be compressed is supplied to a first amplifier stage as an input signal, and the output signal thereof is supplied to the next amplifier stage as an input signal, and so on for a number of successive amplifier stages. Each amplifier stage amplifies its input signal with a stage amplification until it reaches a stage limit level. The analog signal and the respective output signals of the amplifier stages are summed in a summation stage to form a sum signal. Above a minimal level, the magnitude of the curve of the sum signalroughly corresponds to an exponent characteristic of the magnitude of the analog signal.

Abstract: A method and apparatus for selection of downlink carriers in a cellular system that includes selecting a first downlink carrier for use by a mobile node. A decision is made that the mobile node should use another downlink carrier. The mobile node is then directed by a network node to use a second downlink carrier. The first downlink carrier and second downlink carrier may be from different cells or the same cell supplying downlink frequencies. The network node may decide that the mobile node should use another downlink carrier based on several factors such as current load conditions of the cells supplying the first downlink carrier and the second downlink carrier, a type of service on the current downlink carrier, whether the mobile node has connection capability at frequencies of the second downlink carrier, or if a potential interference condition may exist.

Abstract: A data compression program making a computer perform processing which enables compression of only highly compressible data. First, a transmitter-side device performs compression processing of a portion of data to be compressed. Next, the transmitter-side device compares volumes of the portion of the data before and after the compression processing, and determines whether or not the compression processing is effective. When the data to be compressed is uncompressed data, the volume of the portion of the data is reduced by the compression processing. On the other hand, when the data to be compressed is compressed data, the volume of the portion of the data is not reduced by the compression processing. Therefore, only when it is determined that the compression processing is effective, the transmitter-side device compresses the other portions of the data to be compressed.

Abstract: The invention discloses a portable device that is similar to a combination of a palm top computer and a cellular telephone, and which allows the user to access the Internet and World Wide Web. A host computer that may also be a Web server, is connected to the Internet and comprises various software programs to translate, rasterize and compress images received from the Internet. The compressed images are sent the portable device and the device is capable of decompressing the compressed image. Thus, the user views a bit map image of a Web page. The portable device further comprises methods of pointing and clicking on text and images which represent links to other pages. All commands that the user enters into the portable device are sent to the host computer, which performs the commands via a virtual browser, and sends the information back to the portable device.

Abstract: In an input signal power dynamic range compressing circuit, an input signal is distributed by a directional coupler to a linear signal transfer path and a compressing signal generating path, and in the compressing signal generating path a compressing signal, which keeps the peak-to-average-power ratio of the input signal below a predetermined value, is generated from the input signal. The compressing signal is combined by a power combiner with the input signal having passed through the linear signal transfer path.

Abstract: A dual-mode communication system comprises a compressor for compressing a voice signal in response to a predetermined communication mode and an expander for expanding the compressed voice signal. The compressor includes a divider for dividing the voice signal by a first gain, a rectifier for rectifying the divided signal, and a gain controller for updating the first gain in response to the rectified signal. The expander includes a rectifier for rectifying the compressed voice signal, a gain controller for updating a second gain in response to the rectified signal, and a multiplier for multiplying the compressed voice signal by the second gain. The compressor and the expander may be constructed in a digital signal processor (DSP). The DSP may perform the dual mode of analog communication as well as digital communication. The dual-mode communication system needs no additional circuitry for performing the analog communication.

Abstract: Data of a time transmission interval is to be transmitted in a wireless communication system. The wireless communication system uses adaptive modulation and coding and has automatic repeat request mechanism. A transmission time interval has a plurality of transport block sets. The transport block sets are transmitted with a first specified modulation and coding scheme. Each transport block set is received and a determination is made as to whether the transport block sets meet a specified quality. When the specified quality is not met, a repeat request is transmitted. The specified modulation and coding scheme is changed to a second specified modulation and coding scheme that may support a reduced number of TBS's within the transmission time interval. In response to the repeat request, at least one of the transport block sets is retransmitted. The retransmitted transport block set is received. The retransmitted transport block set may be combined with a corresponding previously received transport block set.

Abstract: A method for transmitting a unique signal pattern on a serial bus to indicate the need for processing to re-establish synchronous communications on said bus, especially at power up, awaken from sleep or upon a fault such as loss of synchronization. The method comprises sending one or more silent intervals on a bus which normally requires transmission of data or fill characters at all times to maintain synchronization. The silent interval(s) have a predetermined duration and a predetermined sequence of durations if the durations of each interval are different and more than one interval is used. The predetermined pattern is known to all transceivers coupled to the bus. A long silent interval of a predetermined duration which is also known to all transceivers is sent at the end of the unique pattern to indicate the end of transmission thereof. A low power receiver monitors the bus at all times and listens for silent intervals and measures the durations thereof.

Abstract: Compander architecture and method for ensuring that the components of an output signal are synchronized includes calculating a gain calculation for an input signal, detecting a predetermined condition such as a zero crossing or absence of a zero crossing within a specified period, and ensuring that the result of the gain calculation is providing to the system synchronously with the input signal. The input signal may be divided into one or more signals for processing, and the gain calculation may include one or more power estimations and one or more gain cells associated with the multiple signals, and may further include variable attack and release.

Abstract: A method is disclosed for increasing signaling link capacity between nodes in a digital cellular communications system, wherein the signaling message to be conveyed over the link is compressed. The compressed message received at the other side of the link is then decompressed. As a consequence, the capacity of the signaling links between nodes can be increased up to 100%, and mobile station registration restrictions can be reduced. The method is disclosed for compressing MTP messages, but it can also be used for compressing other signaling messages to improve link capacity.

Abstract: The present invention includes a time-division-multiple-access (TDMA) communication system having a base station and at least one mobile station, each transmitting and receiving an analog radio-frequency signal carrying digitally coded speech. The speech is encoded using a vocoder which samples a voice signal at variable encoding rates. During periods when the radio-frequency channel is experiencing high levels of channel interference, the encoded voice channel having a lower encoding rate is chosen. This low-rate encoded voice is combined with the high degree of channel coding necessary to ensure reliable transmission. When the radio-frequency channel is experiencing low levels of channel interference, less channel coding is necessary and the vocoder having a higher encoding rate is used. The high-rate encoded voice is combined with the lower degree of channel coding necessary to ensure reliable transmission.

Abstract: An apparatus and method for compressing and expanding an information signal for use in noise reduction which includes an input terminal to receive the information signal, a first frequency crossover circuit coupled to the input terminal and configured to divide the information signal into a first and second frequency band. A second frequency crossover circuit coupled with the first crossover circuit configured to receive at least a portion of the information signal within the first frequency band and to further divide the information signal into a third and fourth frequency band. A third frequency crossover circuit coupled with the first crossover circuit configured to receive at least a portion of the information signal within the second frequency band and to divide the information signal into a fifth and sixth frequency band.

Abstract: Method and apparatus for header compression in a wireless communication system supporting broadcast transmissions. The system periodically provides a header decompression message sufficient for a receiver to decompress the header. The decompression message transmission period is determined to avoid delay in accessing a broadcast session.

Abstract: A communication device is provided having a speech encoder and a speech decoder and being able to retrieve and store voice messages in a memory. The messages are stored in the memory according to a message format. This format is more compressed than the speech encoding format which is provided by the speech encoder. The device includes a frame interpolation block for decompressing a stored message and thereby creating a signal according to the speech encoding format. A frame decimation block is also provided for compressing a speech encoded signal thereby allowing a corresponding voice message to be stored in the memory according to the message format.

Abstract: A transcoder of a switching node MSC of a core network is inserted into a connection call of a transcoder-free-operation on the basis of an answer from a switching node RNC of a radio access network against an inquiry about a setting information of transcoder performed by the switching node MSC in a user layer of a Iu interface to insert a tone signal, etc., into the connection call of transcoder-free-operation. The insertion of transcoder into a connection call of a transcoder-free-operation can be executed without performing a reinitializing procedure.

Abstract: A DECT fixed part for providing a communications link between a DECT portable part and a GSM mobile switch center, the fixed part comprising a compression negotiation means for: receiving from one of the portable part and the mobile switch center a first message specifying a form of compression for a data service; and using that first message, determining a second message to be sent to the other of the portable part and the mobile switch center to request it to adopt a corresponding form of compression for the data service; so as to allow the provision of a compressed data service between the portable part and the mobile switch center.

Abstract: A method of communication and the communication system wherein, there is provided a first telephone for receiving information, time-compressing the information, storing the information and transmitting the information to a central station. There is provided at least one and generally a plurality of spaced apart central stations for receiving the time-compressed information from the first telephone, storing the time-compressed information and retransmitting the time-compressed information to a second telephone. A second telephone is provided for receiving the time-compressed information from the central station, one of storing the time-compressed information and, responsive to call-up, time-decompressing and transmitting the time-decompressed information or time-decompressing the time-compressed information and storing the time-decompressed information and then, responsive to call-up, transmitting the time-decompressed information.

Abstract: A system and method are disclosed whereby, in order to achieve a desired receive audio dynamic range compression factor (e.g., 2:1) at higher background noise levels, an analog mobile station's receiver is inhibited from expanding the received compressed signal. In other words, the received audio signal remains compressed for local background noise levels above a predetermined threshold level. Also, a digital mobile station's audio receiver (or mobile station's receiver that uses digital signal processing for audio) is enabled to achieve a 2:1 compression directly on an uncompressed receive audio signal using a compression software algorithm. In other words, the received (uncompressed) audio signal is compressed in the digital receiver for local background noise levels above a predetermined threshold level, in order to achieve a desired dynamic range.

Abstract: In an input signal power dynamic range compressing circuit, an input signal is distributed by a directional coupler to a linear signal transfer path and a compressing signal generating path, and in the compressing signal generating path a compressing signal, which keeps the peak-to-average-power ratio of the input signal below a predetermined value, is generated from the input signal. The compressing signal is combined by a power combiner with the input signal having passed through the linear signal transfer path.

Abstract: A communications link for data communication via satellite includes interface apparatus comprising a satellite link interface for connection to a satellite link and a PSTN interface for connection to a PSTN. The interface apparatus supports different data compression modes in the communication link. Mode A allows data compression over the PSTN but not over the satellite link. Mode B allows data compression over the PSTN and over the satellite link, but enables decompression and recompression of data flowing in each direction through the interface apparatus. Mode C allows compressed data to pass transparently between the PSTN and the satellite link, while the interface apparatus performs error correction on the satellite link and on the PSTN.

Abstract: When the user of a portable radio apparatus performs an operation for transmitting data outside a communication service area, the data to be transmitted is compressed in a compression section 6, and stored in a compressed data memory 13. When the user moves within the communication service area, the stored compressed data is automatically transmitted. On the other hand, when destination information for the transmitted data already exists, only the transmitted data is added to the destination information already registered, and transmitted in a batch. Alternatively, if the destination has a function for decompressing compressed data, the compressed transmitted data is transmitted in a batch, while, if the destination does not have the function for decompression compressed data, the compressed transmitted data is decompressed and transmitted.

Abstract: A telephony device includes a base station and a wireless handset. The base station has a responder with a memory. A processor of base station processes digital speech signals having a first code on signal lines connecting the input and output of the base station. The same processor also controls a converter which is located between the memory and the signal lines. Prior to storing in the memory, the converter codes the digital speech signals into a second code for storage in the memory, where the second code is the same code of the digital signals exchanged between the base station and the handset. Further, prior to reading from the memory, the converter decodes the digital speech signals of the second code stored in the memory into the first code.

Abstract: A Vehicle Information and Safety System (VISC) includes a main computer at a vehicle fleet headquarters (HQ) with access over a CDPD data network to a computerized sensor system mounted in each vehicle of the fleet. Sensors which may be used include load sensors coupled to the axles, accelerometers and temperature sensors coupled to the cargo bay, infrared andor pressure sensors monitoring the operator, cameras viewing the cargo bay, cab andor environment, and GPS data. The sensor data are processed by in-vehicle andor HQ computers, to monitor the state of the vehicle and operator, and the security status of the vehicle. PSAP (911) calls can be transmitted from the vehicle under remote control from the HQ for those cases in which the operator is unavailable or unresponsive, and the transmission can be tagged with GPS data. Speech signals from the operator are converted to text, and may be used for control of various functions, or may be data-compressed for transmission over the data network to HQ.

Abstract: A DECT fixed part for providing a communications link between a DECT portable part and a GSM mobile switch center, the fixed part comprising a compression negotiation means for: receiving from one of the portable part and the mobile switch center a first message specifying a form of compression for a data service; and using that first message, determining a second message to be sent to the other of the portable part and the mobile switch center to request it to adopt a corresponding form of compression for the data service; so as to allow the provision of a compressed data service between the portable part and the mobile switch center.

Abstract: The present invention is a digital FM voice paging system which uses digital signal processing (including D/A conversion and data compression) to transmit voice pager data over existing FM broadcast subcarriers.

Abstract: A method and apparatus for improving the signal-to-noise ratio of a citizen's band (CB) radio is disclosed. A compander circuit is used in both the transmitting and receiving portions of the citizen's band radio. Demodulated incoming audio signals are expanded by the compander circuit to increase the dynamic range of the incoming audio signals. Outgoing audio signals from a microphone are compressed by the compander circuit to decrease the dynamic range of the outgoing audio signals before they are amplified and transmitted.

Abstract: A method and apparatus are provided that improve data transmissions in a wireless network, optimized for the transmissions of voice signals, by companding data signals electrically about a spectral shaping module in data handling devices, preferably modems, at both the transmitting and receiving ends of the wireless network. At the transmitting end, the companding is performed by a compressor, electrically preceding a data de-emphasis module, and an expander, electrically succeeding the data de-emphasis module. At the receiving end, the companding is performed by a compressor, electrically preceding a data pre-emphasis module, and an expander, electrically succeeding the data pre-emphasis module.

Abstract: An automatic link establishment (ALE) method of establishing a link between two or more HF radios or stations, and an apparatus using the same, are disclosed. The invention provides a transmission protocol that allows HF radios to rapidly exchange call data to enable the first radio and second radio to have knowledge of the frequency propagating characteristics used for communication. The method includes transmitting 24 bit words from the first station to the second station and vice-a-versa in the CALL. The words include a three bit preamble, at least about 3 bits of data to be transmitted from the second station to the first station, and a compressed representation of three characters of the address of at least one of the stations. The number of words transmitted during the CALL, RESPONSE and ACKNOWLEDGE are greatly reduced from the protocol defined in MIL-STD-188-141A Notice 2.

Abstract: The present invention is a digital FM voice paging system which uses digital signal processing (including D/A conversion and data compression) to transmit voice pager data over existing FM broadcast subcarrriers.

Abstract: An integrated cellular switched modem for enhanced cellular data communication by implementing in DSP or Software all baseband processing normally carried out in a cellular radio transceiver within the processor of the single integrated wireless modem. Adjustments are made to EIA/TIA standards for pre-emphasis, de-emphasis, and companding functions implemented by DSP in order to optimize communication for data.

Abstract: A system for annunciating traffic information includes a plurality of stationary transmitters (42,46) for generating relatively short range, highly directional beam signals (44,48) containing a burst data stream signal (10) to each of a plurality of mobile receivers (50,52,54). The stationary transmitter (42) includes a transmitter (42a) connected to a transmitter antenna (56) for generating the beam signal (44) and to a transmitter control (60) which is connected to a transmitter memory (68) for storing a plurality of compressed data voice messages which are read by the transmitter control and generated as data packet signals (16,20,22) in the burst data stream signal (10).

Abstract: In a mobile telephone device, the audio compressor (21) performs amplitude compression by giving a less variable gain to an input audio signal which is of a lower level range than it does for an input audio signal which is of a higher level range. Alternatively, an adder (17) calculates a sum of (a) an audio signal comprising a talk signal component and a noise component, and (b) a generated signal having an out-of audio frequency, as 6 kHz, and a predetermined level and supplies the compressor (21) with the sum as its input signal. A compressed signal is transmitted to a base station as a radio signal and is expanded.