baber/WOPTO huggingface dataset:
Patent KR-20060108517-A (KR)
Inventor: TAKEKO RYU
IPC: C09J133/06
Filed: 2006-04-12
Abstract: 본 발명의 목적은 아크릴 수지 (1), 아크릴 수지 (2), 실리콘 올리고머 (3) 및 가교제 (4)를 포함하는 접착제를 제공하는 것으로서,  
     상기 아크릴 수지 (1)은 단량체 (A)로부터 유도된 구조 단위 (a) 및 단량체 (B)로부터 유도된 구조 단위 (b)를 포함하고, 1,000,000 내지 2,000,000의 중량-평균 분자량을 가지고,  
     여기서, 상기 단량체 (A)는 하기 화학식 (A)로 나타내는 (메트)아크릴산 에스테르이고: 
     화학식 A 
     
       
     
     (상기 식 중, R 1 은 수소 원자 또는 메틸기를 나타내고, R 2 는 1 내지 14개의 탄소 원자를 가진 알킬기 또는 아랄킬기를 나타내고, R 2 의 수소 원자(들)은 1 내지 10개의 탄소 원자를 가진 알콕시기로 치환될 수 있음), 
     상기 단량체 (B)는 단량체 (B-1) 및 (B-2) 중 적어도 어느 하나이고, 여기서 단량체 (B-1)은 카르복실기 및 하나의 올레핀성 이중 결합을 포함하는 단량체이고, 
     상기 단량체 (B-2)는 히드록시기, 아미드기, 아미노기, 에폭시기, 옥세타닐 기, 알데히드기 및 이소시아네이트기로 구성된 군으로부터 선택되는 1종 이상의 극성 작용기 및 올레핀성 이중 결합을 포함하는 단량체이고; 
     아크릴 수지 (2)는 구조 단위 (a) 및 구조 단위 (b)를 포함하며 50,000 내지 500,000의 중량-평균 분자량을 가지며; 
     실리콘 올리고머 (3)는 하기 화학식 (S)로 나타내는 화합물로부터 유도된 2 내지 100개의 구조 단위를 가진다: 
     화학식 (S) 
     
       
     
     (상기 식 중, R 3  및 R 4 는 알킬기 또는 페닐기를 나타내고, X 및 Y는 수소 원자, 임의로 치환된 알킬기, 임의로 치환된 페닐기, 임의로 치환된 알콕시기, 임의로 치환된 페녹시기, 임의로 치환된 아랄킬기, 임의로 치환된 아랄킬옥시기, 비닐기, 비닐옥시기, 1,2-에폭시시클로헥실기, 1,2-에폭시시클로헥실옥시기, 스티릴기, 스티릴옥시기, 메타크릴로일옥시기, 아미노기, 우레이도기, 머캡토기 또는 이소시아네이트기를 나타냄). 
     아크릴 수지, 실리콘 올리고머, 가교제, 접착제
Patent KR-20070106355-A (KR)
Title: Straw, tube, hula hoop
Inventor: CHOI HYO SEUNG
IPC: A47G21/18
Filed: 2006-04-29
Abstract: A straw, a tube and a hula hoop are provided, which have an expanded portion which is shaped in a form of heart, human body, or company logo, in one cylindrical portion by means of a blow molding method so as to be used for advertising a desired object, and which secures the simple construction so as to be produced at a low manufacturing cost. A straw includes: a body(01); a cylindrical portion(02); and both ends(03,04); as well as a human body shaped portion(05), formed in a determined position of the cylindrical portion(02); wherein the position and size of the human body shaped portion are selected according to the using purpose or the desired advertising effect of an orderer.
Patent KR-20060117286-A (KR)
Title: Apparatus useful for positioning a device on an endoscope
Inventor: SPIVEY JAMES T
IPC: A61B1/005
Filed: 2006-05-15
Abstract: An apparatus for positioning a device on an endoscope is provided to reduce a number of steps required for a special medical process by decreasing the frequency to change a position of hands during an operation. In an apparatus(10) for positioning a device on an endoscope, a first element is provided to apply force to the device. A second element operably linked with the first element moves with respect to the first element. The second element is adopted to apply the force to the endoscope via an opening placed at an inside of the device.
Patent KR-20060122706-A (KR)
Title: Method for manufacturing sintered soft magnetic member
Inventor: YANAKA MASAKI
IPC: H01F41/02
Filed: 2006-05-18
Abstract: A method for manufacturing a sintered soft magnetic member is provided to extract a formed material from a mold by using a forming lubricant mixed with ethylene-bis-stearoamide and aliphatic carboxylic acid monoamide. A method for manufacturing a sintered soft magnetic member includes the steps of: mixing ethylene-bis-stearoamide and aliphatic carboxylic acid monoamide at a weight ratio of 6:4 to 8:2 as a forming lubricant; and using the forming lubricant of 0.4 to 1.2 weight%.
Patent KR-20070114606-A (KR)
Title: Communication system and voice over internat protocol apparatus and data communication method
Inventor: HWANG SOON HOON
IPC: H04L12/66
Filed: 2006-05-29
Abstract: A communication system, a VoIP(Voice over Internet Protocol) apparatus, and a data communication method are provided to realize text transmitting/receiving functions between wireless terminals through VoIP communication between VoIP apparatuses, thereby saving service usage charges imposed by the text transmitting/receiving functions. The first VoIP apparatus(10) receives transmission data including destination information of a receiving wireless terminal(70b) from a transmission wireless terminal(70a) through short-range communication, and transmits the received data through VoIP communication. The second VoIP apparatus receives the transmission data through the VoIP communication, and transmits the data to the receiving terminal(70b) through the short-range communication. A server(100) stores an intrinsic address for the second VoIP apparatus corresponding to the destination information, and transmits the transmission data to the second VoIP apparatus based on the stored intrinsic address and the transmission data.
Patent KR-20070117331-A (KR)
Title: Laser display device
Inventor: SON JOONG KON
IPC: G02B26/10
Filed: 2006-06-08
Abstract: A laser display device is provided to form an image through luminescence of red and green fluorescent bodies of a blue laser beam and scattering of a blue scatter to increase brightness and contrast ratio. A laser display device is composed of a light source(100) which is a blue laser diode(L1,L2,L3) for emitting at least one laser beam(L); a scanning unit(150) for horizontally and vertically scanning the laser beam; an imaging unit(190) for forming an image and generating the excited light and the scattered light by the laser beam irradiated from the scanning unit; and a collimating optical system(110) disposed between the light source and a light modulating unit(120) to change the laser beam, emitted from the light source, to the parallel light.
Patent KR-20070120270-A (KR)
Title: A liquid crystal display device and a method for fabricating the same
Inventor: KIM BINN
IPC: G02F1/1335
Filed: 2006-06-19
Abstract: An LCD and a fabrication method thereof are provided to prevent light emitted from a backlight unit from being emitted to a semiconductor layer by providing a light shielding layer between a light source and the semiconductor layer. A substrate includes a plurality of pixel regions defined by a plurality of gate lines(GL) and a plurality of data lines(DL) intersecting each other. A thin film transistor(TFT) is formed at each of intersections of the data lines and the gate lines. A pixel electrode is formed in each pixel region. A semiconductor layer is formed between the data line and the substrate. A light source emits light toward a lower surface of the substrate. At least one light shielding layer(222) is formed between the light source and the semiconductor layer to overlap the semiconductor layer, and is electrically connected to the data line.
Patent KR-20070120384-A (KR)
Title: Array substrate for liquid crystal display device and method for fabricating the same
Inventor: CHOI NACK BONG
IPC: G02F1/136
Filed: 2006-06-19
Abstract: An array substrate for an LCD and a fabrication method thereof are provided to prevent a defect caused by a weak adhesive force by forming source and drain electrodes contacting a semiconductor layer made of an organic semiconductor material by using ITO(indium-tin-oxide). A first source electrode(205a) and a first drain electrode(208a) are formed of a first metal material on a substrate(201) and are spaced apart from each other. A second source electrode(205b) and a second drain electrode(208b) are formed of ITO, and completely cover top and side surfaces of the first source electrode and the first drain electrode, respectively. A pixel electrode(213) contacts the second drain electrode. An organic semiconductor layer(217) contacts the second source electrode and the second drain electrode, and is formed in an region between the two electrodes. A gate dielectric layer(220) is formed on the organic semiconductor layer. A gate electrode(225) is formed on the gate dielectric layer.
Patent KR-20080001236-A (KR)
Title: Optical sheet and backlight unit having the same
Inventor: MOON WON TAEK
IPC: G02F1/13357
Filed: 2006-06-29
Abstract: An optical sheet and a backlight unit having the same are provided to reduce processing costs, simplify an assembling process, and obtain high brightness by including a first sheet having plural asymmetric triangular patterns in its upside and including a second sheet having plural asymmetric triangular patterns in its bottom. A first sheet(18) has plural asymmetric triangular patterns(18a) in its upside. A second sheet(19) has plural asymmetric triangular patterns(19a)' in its bottom. A first angle of the triangular pattern for refracting light in the first sheet is about 50 to 85 agrees. A second angle of the triangular pattern for refracting light in the second sheet is about 0 to 50 agrees. The triangular pattern on the first sheet and the triangular pattern of the bottom of the second sheet have the same width.
Patent KR-20070005878-A (KR)
Title: Aromatic polyamide filament and method of manufacturing the same
Inventor: HAN IN SIK
IPC: B29C48/30
Filed: 2006-07-05
Abstract: An aromatic polyamide filament and a manufacturing method thereof are provided to have narrow PDI(Polydispersity Index) and large ACS(Apparent Crystal Size). When manufacturing the aromatic polyamide polymer, the multiple pipe type of monomer and polymer solution supply pipe(11) includes alternately repeated inside and outside passages. One selected from polymerization solvent(B) including the dissolved aromatic diacid chloride(A) and an aromatic diamine is alternately into the polymerization reactor(20) through the respective inside and outside passages.
Patent KR-20080007973-A (KR)
Title: Streeing column of vehicles
Inventor: LEE JONG CHAN
IPC: B62D1/19
Filed: 2006-07-19
Abstract: A steering column of a vehicle is provided to improve convenience of assembling work, and to save manufacturing cost by preventing unnecessary movement of a steering shaft in a lock state of a tilt lever. A steering column of a vehicle comprises: a lower tube(51) surrounding a lower end of a steering shaft(11) in the direction toward a steering gear box at the middle point of a length direction of the steering shaft, a tube bush(52) provided to surround a partial section of the lower tube at the middle point of the length direction of the steering shaft and provided with a bush flange folded outward at one end toward the steering gear box, a column housing(53) surrounding the tube bush and having one end hung on the bush flange, an upper tube(54) whose one end is pressed into a space between the tube bush and the column housing while surrounding an upper end of the steering shaft in the arrangement direction of the steering wheel, a tilt bracket(55) whose both ends are surface-contacted to an outer surface of the column housing, a tilt bolt(56) and an adjust bolt(57) that are screwed to the column housing.
Patent KR-20080008004-A (KR)
Title: Fastening bolt for repairing cracks
Inventor: SONG JANG YONG
IPC: F16B31/00
Filed: 2006-07-19
Abstract: A fastening bolt for repairing cracks is provided to repair/improve a crack that is generated and enlarged from the inside of a structure more effectively. A fastening bolt for repairing cracks comprises a screw thread formed to be inclined downward in a body thereof. The fastening bolt repairs/enhances a crack(100) by being fastened into a bolt hole(300) formed in the crack of a structure via the screw thread. An end of the fastening bolt is formed in a conical type. An inner angle of a vertex of the conical end is larger by 2 to 5 degrees than that of a center of a bottom thereof.
Patent KR-20080013629-A (KR)
Title: Air purifying filter
Inventor: JI JUN HO
IPC: B01D39/00
Filed: 2006-08-09
Abstract: An air purifying filter is provided to extend the life of an activated carbon fiber filter, construct the activated carbon fiber filter in a simple structure, and reduce operating and maintaining costs of the activated carbon fiber filter. An air purifying filter(100) comprises: a filter case(110) for accommodating the activated carbon fiber filter; an activated carbon fiber filter(120) installed in the filter case such that the activated carbon fiber filter can travel to adsorb and remove polluted gas components; a nanoparticle spray(140) for spraying the functional nanoparticles onto the activated carbon fiber filter to coat functional nanoparticles on a surface of the activated carbon fiber filter; and an ultraviolet lamp(150) for irradiating ultraviolet rays onto the activated carbon fiber filter. The filter case has an inlet(111) formed in a front side thereof, and an outlet(112) formed in a rear side thereof. The air purifying filter further comprises a pair of rollers(131,133) installed within the filter case and spaced apart from each other to run the activated carbon fiber filter.
Patent KR-20080014370-A (KR)
Title: Semiconductor memory device having open bit line structure
Inventor: WON HYUNG SIK
IPC: G11C29/00
Filed: 2006-08-11
Abstract: A semiconductor memory device having open bit line structure is provided to improve bit line develop performance and to change develop speed, by enabling two sense amplifiers to develop a bit line at the same time, for the bit line selected in response to an activated word line. A main sense amplifier(100) senses a bit line. A sub-sense amplifier(200) senses the bit line at the same time by being connected to the main sense amplifier with a metal line. The metal line is connected to the bit line. A switching part(110,120,130,140) controls connection state of the bit line and the metal line in response to a control signal. An NMOS transistor responds to the control signal.
Patent KR-20070021071-A (KR)
IPC: H01F27/00
Filed: 2006-08-16
Abstract: 통신 모드에서 통신 신호들을 픽업하기 위한 안테나로서 기능하고, 전력 변환 모드에서 디바이스에 전력을 공급하기 위해 내부 전원으로부터 이용가능한 전력을 조절하기 위해 사용되는 스위칭 레귤레이터 내의 에너지 저장 인덕터가 되도록 구성된 유도성 소자로서 기능하도록 구성된 유도성 소자; 및 상기 통신 모드와 상기 전력 변환 모드 사이를 전환하기 위한 제어가능한 스위치를 포함하는 전자 디바이스가 개시된다.  통신 시스템은 상기 수신기 또는 상기 전력 변환 회로 중 어느 하나에 상기 유도성 소자를 접속하기 위한 제어가능한 스위치를 더 포함한다.  제어가능한 스위치는 단극성 또는 바이폴라 트랜지스터 스위치들 또는 기계적 스위치들 또는 중계기들에 의해 통신 모드와 전력 변환 모드 사이에서 시스템을 전환시킨다.  통신 시스템은 생체내 의료 디바이스에서 사용될 수도 있다. 
       
     전력 변환기, 마이크로제어기, 수신기, 유도성 소자, 생체내 의료 디바이스
Patent KR-20060099494-A (KR)
Inventor: KIM YOU JUNG
IPC: G06Q30/00
Filed: 2006-08-23
Abstract: 본 발명은 인센티브 제공방법 및 시스템에 관한 것으로써, 네트워크 상의 서버에서 특정 그룹에 포함되는 복수의 클라이언트들 또는 상기 특정 그룹의 대표 클라이언트와 일정 기간 동안 상기 특정 그룹 구성원들이 특정 결제수단을 이용하여 특정 상품을 일정량(또는 일정 금액) 이상 구매하겠다는 약정, 및/또는 일정 기간 동안 특정 가맹점에서 일정 금액 이상 구매하겠다는 약정을 체결하는 그룹 구매약정 체결단계; 상기 서버에서 상기 그룹 구매약정 체결단계에서 체결된 구매약정 정보를 상기 특정 그룹 구성원의 결제수단 정보와 연계 처리하여 소정의 저장매체에 저장하는 그룹약정 정보 저장단계; 상기 그룹 구매약정 체결단계에서 체결된 약정 정보를 근거로, 상기 특정 상품 판매사 또는 특정 가맹점과의 소정의 구매계약 체결시, 상기 서버에서 상기 특정 상품 판매사 또는 특정 가맹점과의 구매 계약에 대응하는 소정의 인센티브 제공 조건 정보를 상기 저장매체에 저장하는 인센티브 정보 저장단계; 일정기간 동안, 상기 서버에서 상기 특정 결제수단을 이용하는 복수개의 결제수단 이용 내역 정보 중 상기 특정 그룹 구성원의 결제수단 이용 내역을 추출하는 결제수단 이용내역 추출단계; 상기 서버에서 상기 결제수단 이용내역 추출단계에서 추출한 상기 특정 그룹 구성원의 결제수단 이용 내역으로부터 상기 특정 가맹점 및/또는 상품 구매 내역을 추출하는 특정 가맹점(또는 상품) 구매내역 추출단계; 상기 서버에서 상기 특정 가맹점(또는 상품) 구매내역 추출단계에서 추출한 특정 가맹점(또는 상품) 구매내역을 합산하여, 일정기간 동안 상기 특정 그룹  구성원들의 특정 상품 총 구매량(또는 금액) 및/또는 특정 가맹점에서의 총 구매금액 정보를 산출하는 총 구매정보 산출단계; 상기 서버에서 상기 총 구매정보 산출단계에서 산출한 상기 특정 그룹 구성원들의 특정 상품 총 구매량(또는 금액) 및/또는 특정 가맹점에서의 총 구매금액 정보와 상기 저장매체에 기 저장된 구매약정 정보에 대응하는 특정 상품 구매량(또는 금액) 및/또는 특정 가맹점에서의 총 구매금액 정보를 비교하는 총 구매정보 비교단계; 및 상기 총 구매정보 비교단계의 비교결과에 따라, 상기 서버에서 상기 특정 그룹 구성원에게 상기 저장매체에 기 저장된 인센티브 정보에 대응하는 인센티브를 제공하는 인센티브 제공단계;를 포함한다.  
     이에 의해, 결속력있는 특정 그룹을 기반으로 하는 구매자(또는 이용자)를 확보할 수 있으며, 상기 특정 그룹과의 약정체결 등을 통하여, 매출 확보 및 우량고객 확보를 보장받을 수 있다. 
       
     특정상품,약정,인센티브,할인금액,산정
Patent KR-20080020255-A (KR)
Title: Method for processing blue barley
Inventor: OH JUNG HEE
IPC: A23L7/10
Filed: 2006-08-31
Abstract: A method for processing green barley is provided to maintain the nutrition and taste of green barley by steaming, peeling and sterilizing processes. A method for processing green barley comprises the steps of: washing green barley; steaming the washed green barley; peeling the steamed green barley; sterilizing the peeled green barley; and packing the sterilized green barley. The taste of the steamed green barley is adjusted by temperature, salinity and sugar content, thereby producing various processed foods using green barley.
Patent KR-20080020919-A (KR)
Title: Sis-6000
Inventor: KIM KYU SIK
IPC: G08B25/08
Filed: 2006-09-02
Abstract: A portable eavesdropping detector is provided to detect a hidden camera in real-time and transmit a detection notification message to a user using a telephone network. A portable eavesdropping detector includes a microcomputer(10), which receives a signal from a hidden camera detector and outputs a control signal. A memory(11) stores plural telephone numbers and an alarm message. An automatic dialing unit(13) is connected to the microcomputer and dials one of the stored telephone numbers when a detection notification signal is received from the hidden camera detector. A message output unit(14) automatically outputs an alarm message stored in the memory, when a call is established.
Patent KR-20080022888-A (KR)
Title: Method and system for affilating financial agency and shopping mall and program recording medium
Inventor: KIM KWAN TAE
IPC: G06Q40/02
Filed: 2006-09-08
Abstract: A method for processing cooperation between a financial facility and a shopping mall is provided to enable the best customers of the financial facility to receive the same discount rate as staff of the financial facility from the Internet shopping mall used by the staff of the financial facility. A shopping mall server provides a customer authentication window to a customer terminal and transmits customer authentication information received through the window to a financial facility server(320). The financial facility server checks whether a customer is the best customer of a financial facility based on the information received from the shopping mall server by linking with a ledger database. The financial facility server transmits a customer authentication result to the shopping mall server(345). The shopping mall server sells goods to the customer by applying a discount rate corresponding to a financial transaction result of the financial facility when the connected customer is the best customer of the financial facility(350).
Patent KR-20080023450-A (KR)
Title: Electron emission display device with getter
Inventor: SONG GI YOUNG
IPC: H01J1/30
Filed: 2006-09-11
Abstract: An electron emission display device with a getter is provided to effectively decrease an unnecessary space except for an effective area by applying a driving voltage to an anode electrode through a lead line. An electron emission display device includes first and second substrates(10,12), an electron emitting unit(100), a light emitting unit(110), and a coupling member(36). The first and second substrates are opposed to each other and form a vacuum container. The electron emitting unit is provided on the first substrate. The light emitting unit is provided on the second substrate. The coupling member couples an anode terminal with a lead line. The anode terminal is elongated from an anode electrode which is formed on the light emitting unit. The lead line is formed on the first substrate. A getter container is formed on one side of the coupling member, which supports the getter.
Patent KR-20060107959-A (KR)
Inventor: SAIDA SHINSUKE
IPC: G02F1/1333
Filed: 2006-09-11
Abstract: 액정 표시 장치는 액정층, 상기 액정층보다 관찰자 측에 더 인접하여 배치된 제1기판, 상기 액정층을 통해 상기 제1기판과 대향하도록 배치된 제2기판, 및 상기 제1기판보다 관찰자 측에 더 인접하여 제공된 제1편광판을 포함한다. 상기 제1기판은 복수의 섬유가 제1방향으로 정렬되는 제1플라스틱 기판을 포함한다. 제1편광판은 상기 제1편광판의 투과 축이 제1방향에 대해 실질적으로 평행하거나 실질적으로 수직이 되도록 정렬된다.
Patent KR-20080023947-A (KR)
Title: Plasma display panel
Inventor: TAKAYAMA KUNIO
IPC: H01J11/24
Filed: 2006-09-12
Abstract: A plasma display panel is provided to enlarge driving margin of the plasma display panel by preventing the erroneous discharge due to a remaining wall charges. A plasma display panel includes a rear substrate(210), plural address electrodes(220), a front substrate(110), plural sustain electrode pairs(200), and a barrier rib(240). The address electrodes are formed on the rear substrate and coated by a dielectric layer. The front substrate is opposed to the rear substrate. The sustain electrode pairs are formed on the front substrate so as to cross the address electrodes and coated by the dielectric layer. The barrier rib defines discharge cells between the front and rear substrates. The sustain electrode pair includes a bus electrode and a branch electrode. The branch electrode is elongated from the bus electrode to elongation direction of the address electrode, such that a sustain discharge is performed at center of the discharge cell toward elongation direction of the bus electrode.
Patent KR-20070061302-A (KR)
Title: System for processing blinking stream information and method thereof
Inventor: LEE CHUNG HO
IPC: G06K17/00
Filed: 2006-09-13
Abstract: A system and a method for processing blinking data of an RTLS tag are provided to loosen overload of a location determination engine by periodically collecting information of the locatable tags through filtration before the blinking data is transferred to the location determination engine and transferring only the valid blinking data to the location determination engine. A tag hash table(32) groups the inputted blinking data of a plurality of RTLS tags by classifying into each tag having the same ID and determines locatability of each grouped tag. A tag stream output queue(33) receives the blinking data of only the tags determined as the locatable tag from the tag hash table and transfers the received blinking data to the location determination engine(34). If an information storing part of the tag ID is empty by a blinking data grouping result of the RTLS tags, the tag hash table determines that the tag corresponding to the tag ID is always locatable.
Patent KR-20080025789-A (KR)
Title: The taping tool of the automobile rubber-hose
Inventor: OH YOU IN
IPC: F16L33/00
Filed: 2006-09-19
Abstract: A taping tool of a rubber hose for a vehicle is provided to tape a rubber hose securely by pressing taper holders to the outer surface of the rubber hose as the tape holder of a rotary plate rotating at a high speed. A taping tool of a rubber hose for a vehicle comprises a main body(10), a rotary plate(20), a drive motor, and a plurality of brackets. A first timing belt connects the rotary plate with a first drive wheel. The drive motor is configured to rotate an interlocking wheel(15) provided with a support at a high speed. The brackets fix tape holders installed at the front surface of the interlocking wheel. The rotary plate is mounted on an X axis plate(29) which is mounted on a Y axis plate(34) so that the rotary plate can move horizontally and vertically. A second timing belt(27) connects a rotary wheel(23) installed under the rotary plate with a second drive wheel(26) installed under a fixed plate(28). The rotary plate rotates at a predetermined angle when the drive wheel transmits torque to the rotary wheel of the rotary plate. The interlocking wheel installed on the front surface of the rotary plate turns the tape holders at a high speed by receiving torque of the first drive wheel, causing tapes wound around the tape holder to press the outer surface of the rubber hose.
Patent KR-20070034441-A (KR)
IPC: H04L29/02
Filed: 2006-09-22
Abstract: A method and apparatus for transmitting a voice packet through a radio link in a mobile communication system providing a voice service through a packet network inter-working with the Internet are provided, in which a voice packet based on an Internet protocol (e.g. a VoIP packet) is received, the voice packet comprising headers including a User Datagram Protocol (UDP) checksum; the voice packet is verified by using the UDP checksum, to determine if the voice packet has an error; the headers are compressed to construct a header-compressed packet including the UDP checksum and a Cyclic Redundancy Check (CRC) code calculated for other header fields, except for the UDP checksum from among the headers, when the voice packet has no error, the UDP checksum from the header-compressed packet is deleted to construct a header-compressed packet from which the UDP checksum has been deleted, and the header-compressed packet is transmitted without the UDP checksum through a wireless channel.