Abstract: The present invention relates to an apparatus and a method for vector descriptor representation and multimedia data retrieval, which can quantize a plurality of feature values described by a vector descriptor respectively, represent the quantized feature values in the form of bit or orthogonally transform the quantized bector feature values, and rearrange the feature values represented in the form of bit from the highest bit to the lowest bit or rearrange the transformed coefficient from low frequency to high frequency to represent the vector descriptor hierarchically.

Abstract: A dual time/frequency generation apparatus having a first and a second time/frequency generator for generating time/frequency signals in a code division multiple access CDMA system, including: a first time/frequency dualizing unit for mutually synchronizing a first and a second time clock, 10 MHz frequencies, and time data TOD signals respectively received from the first and second time/frequency generators in accordance with the delay value information and monitoring the operation of a second time/frequency dualizing unit; a second time/frequency dualizing unit for synchronizing the first and second time clocks, 10 MHz frequencies, and time data TOD signals respectively received from the first and second time/frequency generators according to delay value information and monitoring the operation of the first time/frequency dualizing unit to control its output; and a time/frequency out put unit for selecting and outputting one of the other output signs from the first and second time/frequency dualizing units.

Abstract: Disclosed is a control device for controlling power level between frequency assignment in an RF receiving device of a mobile radio communication base station system in a CDMA system capable of lowering the power level of the frequency assignment signal having a relatively high power difference, after the detection of the power level by the frequency assignment, to thereby minimize the power level difference between the frequency assignment and then, executing an AGC for three frequency assignment, whereby the performance deterioration of the whole channels, which is caused due to the disappearance of the frequency assignment signal having a relatively low power difference by the frequency assignment having the high power difference, can be prevented.

Abstract: The fractional E1 link device between a base station and a base station controller, in a link interface between the base station and the base station controller for a mobile communication system, includes: a clock converter for receiving a frame sync clock and a system clock, and converting the system clock to a clock corresponding to the number of subscribers; a processor in synchronism with the output clock of the clock converter, for interfacing transmission/reception data of the base station; a framer/transceiver in synchronism with the frame sync clock and the system clock, for framing the output data of the processor to specific time slots in conformity with a fractional E1 link, and transmitting data received on the fractional E1 link to the processor; and a multiplexer/demultiplexer for multiplexing data received from a different base station from that of the framer/transceiver, transmitting the multiplexed data on a E1/T1 link, demultiplexing data received on the E1/T1 link, and transmitting the demu

Abstract: A synchronization tracking device and method in a code division multiple access (CDMA) receiver including oversampling received signals corresponding to a plurality of chips at a predetermined speed and sequentially storing the oversampled signals in a received signal shift register unit; sequentially storing pseudo noise codes generated in a pseudo noise code generator in a pseudo noise code shift register unit in a chip unit; correspondingly multiplying the output data from the received signal shift register unit and the pseudo noise codes outputted from the pseudo noise code shift register unit by means of a plurality of multipliers; adding the data outputted from the plurality of multipliers and storing the added result as the phase information and energy value for one path; repeatedly performing the above procedure until the phase information and energy values for all paths are stored; and selecting the path corresponding to a largest value in the stored phase information and energy values for all paths

Abstract: Disclosed is a CDMA (Code Division Multiple Access) code timing tracking apparatus capable of exact code timing synchronization without regard to signal gain change by normalizing signal gain to synchronize code timing. The CDMA code timing tracking apparatus correlates each code generated from a PN code generator, which generates on-time code, early code being faster than the on-time code and late code being later than the on-time code, with CDMA signal, low-pass filters output signal of a plurality of correlators with first to third low-pass filters and quantizes output signal of the first low-pass filter.

Abstract: The base station transceiver in a CDMA mobile communication system is configured to have a separate hardware component for performing only a Viterbi decoding apart from a single hardware H/W that performs a composite function of modulation/demodulation and Viterbi encoding/decoding. The modulator and the Viterbi encoder are provided in one hardware by sectors; more than one demodulator being provided by sectors for demodulating signals from multiple users. And, more than one Viterbi decoder is separately provided for performing a Viterbi decoding of the signals demodulated at the plural demodulator constituted in each sector, thereby facilitating a decoding of demodulated signals received from multiple users and enhancing efficiency of the hardware.

Abstract: The trunk routing device and method in a CDMA mobile communication system according to the present invention is contrived to assign and establish a plurality of trunks in the unit of packet to send packet data between a base station controller and a base transceiver station in order to uniformly utilize all trunk paths. Once receiving a new packet from a node connected to the base station controller, the invention extracts information about the packet designation from every packet and switches the packet data with the trunks connected to the designation in the unit of packet, thus sending the packet date to the base transceiver station.

Abstract: There is provided a method for calculating the call processing capacity of a mobile communication system using an Internet communication network. The present invention calculates and stores the call processing capacity of a mobile communication system using an Internet web browser and database to attain accurate call processing capacity information, thereby obtaining an optimal mobile communication system design. Furthermore, since multiple designers can share information about the calculated call processing capacity through a database, thereby making the call processing capacity information be actively effectively used.

Abstract: There is provided a channel card for extending the coverage area of a base station, which controls GPS reference signals provided to base station modems to extend the coverage area by up to four times a general base station coverage area.

Abstract: A base transceiver station with active antennas in a CDMA mobile communication system, comprising a transceiver installed indoors for up-converting a CDMA-modulated signal to be transmitted to a service subscriber and down-converting a signal received from the subscriber into an intermediate frequency signal, a divider installed indoors for dividing a forward channel signal from the transceiver into a plurality of sector-unit forward channel signals, a coupler for coupling a plurality of sector-unit reverse channel signals and transferring the resultant signal to the transceiver, an antenna interface unit installed indoors for appending a DC voltage to each of the sector-unit forward channel signals from the divider, transferring the resultant sector-unit forward channel signals to a Butler matrix, receiving the sector-unit reverse channel signals from the Butler matrix and transferring them to the coupler, and an active radio frequency module installed outdoors for radiating each beam forming signal from the

Abstract: Information on forward power is indicated in the erasure indicator bit of reverse traffic channel frame. A control station searches for the erasure indicator bit of reverse traffic channel frame transmitted from the a mobile, to judge if forward power control is required. The power is controlled according to a transmission rate previously stored when it is judged that the forward power control is required. The control station searches for the erasure indicator bit of reverse traffic channel frame again after the power control and varies the transmission rate according to the information on forward power, carrying out optimum forward power control.

Abstract: A method of transmitting a telephone number in a wireless local loop (WLL) system is provided for allowing a user to instantly hear a ring back tone by immediately performing a dialing in a WLL terminal when a flash signal is input by the user operating a hook switch after a telephone number is dialed in an ordinary telephone connected to the WLL terminal. The method checks the state of a hook switch of the ordinary telephone connected to the WLL terminal. When an off-hook sate is determined, it is determined whether a telephone number is input. When it is determined that a telephone number is input, the telephone number is stored in a dial buffer. It is continuously checked whether a flash signal is input while the input telephone number is being stored in the dial buffer. When the flash signal is input, the telephone number stored in the dial buffer is transmitted to the WLL system base station.

Abstract: An apparatus and method for extending the service area in a mobile communication system is provided, in which the service area is defined with a normal mode or an extension mode based on a distance between the base station and the mobile station and, in case of the extension mode, a transmission clock used by the mobile station for transmitting signals is changed, thus extending the service area. The access is attempted in the normal mode, and the transmission clock for transmitting the mobile signal is advanced the initial delay in the extension mode when the access fails. The access is reattempted with repeating the control of the transmission clock until the number of times of the access attempt reaches a predetermined number of times. When the number of times of the access currently attempted is greater than the predetermined number of times, the extension mode is converted to the normal mode, returning to the initial state.

Abstract: An image chrominance signal filtering method and apparatus in which object chrominance information and background chrominance information are extracted in an image format conversion process, based on shape information of luminance signals, and then decimation-filtered or interpolation-filtered. In accordance with the method and apparatus of the present invention, it is possible to avoid a color bleeding phenomenon occurring at the boundaries of objects in an image. Accordingly, there is an advantage in that a degradation in picture quality is prevented.

Abstract: There is disclosed a separate structure of a datapath layer and a physical layer within an access network loaded with a V 5.2 protocol in a wireless communication system and communication method between two boards respectively having the datapath layer and the physical layer, which separately forms the protocol board with the datapath layer and the physical layer board section including the multiple physical layer boards with the multiple physical layers and connects the separate two entities using the routing section to allow a protocol to be transmitted and received between the two entities, thereby facilitating the designing of the V5.2 protocol board, the extension of the system and the execution of dualization function of the V5.2 LAYER 3.

Abstract: In a shape information coding apparatus and method of bordering a binary alpha block (BAB) by pixels to construct contexts when coding binary shape information, adaptive bordering and coding of the shape information is performed in such a manner of receiving the shape information and storing a BAB; determining whether to perform frame mode coding or field mode coding based upon characteristics of the BAB; and when the frame mode coding is selected, performing frame mode bordering before performing frame BAB coding, and when the field mode coding is selected, performing field mode bordering before performing field BAB coding.

Abstract: There is provided a method for checking a speech channel of a base station and a vocoder of a control station in a mobile communication system, in which its operation station designates specific multiple vocoder of the control station and specific multiple speech channels of the base station to establish a call, to check if the vocoders and speech channels are poor, and when they are confirmed to be poor the operation station does not allow call services through the poor vocoder and speech channel, thereby continuously maintaining high quality call services.

Abstract: A pilot signal strength adjusting method in mobile communication systems, in which strength of pilot signals generating in CPTU installed in base stations is automatically adjusted according to sum of calls which are allocated to reference frequencies of the base stations so that hard hand off to different frequencies is performed smoothly between adjacent base stations, wherein when a mobile station uses service coverage area of a base station which is installed with CPTU Common Pilot Transmit Unit, or calls of mobile stations are concentrated on a reference frequency of the base station which is installed with the CPTU Common Pilot Transmit Unit, strength of pilot signal is adjusted by increasing and/or decreasing power of CPCA installed in the CPTU by using the sum of calls allocated to a reference frequency of a base station installed with the CPTU, predetermined threshold values of set-up calls, predetermined user-units and predetermined power up/down values, so that the base station may smoothly perform

Abstract: A method for tracing a call establishing message between a specific mobile station and a specific channel element or between the specific channel element and a specific vocoder in a code division multiple access mobile communication system. A base station control processor receives information of a mobile station or channel element to be traced and the type of the call establishing message to be traced, from an operator. When the specific mobile station sends a call establishing request, the processor determines whether the specific mobile station is the mobile station to be traced. The processor sends a traffic channel establishing message to the specific channel element if the specific mobile station is the mobile station to be traced. Alternatively, the processor sends the traffic channel establishing message to the specific channel element if the specific channel element is the channel element to be traced.