baber/WOPTO huggingface dataset:
Patent KR-20020051553-A (KR)
Title: Apparatus and method for IPC message passing in switching system
Inventor: SIM HAN SEON
IPC: H04L12/40
Filed: 2000-12-22
Abstract: PURPOSE: A system and a method for transferring IPC(Inter Process Communication) messages in an exchange are provided to convert an IPC message into an inter IPC server message or an inter IPC server message into an IPC message so that processes in different systems can exchange IPC messages each other. CONSTITUTION: A system for transferring IPC messages consists of processes(13,23), IPC message conversion libraries(15,25), and IPC servers(17,27). The process(13) in system A fetches the IPC message conversion library(15), encodes an IPC message to transmit to the other system(B), converts it into an inter IPC server message, and transfers the converted message to the IPC server(17). Also the process(13) fetches the IPC message conversion library(15) to decode an inter IPC server message transferred through the IPC servers(17,27) from the other system(B) and converts it into an IPC message. The IPC message conversion libraries(15,25), fetched by their respective processes(13,23), encodes IPC messages into inter IPC server messages or decodes inter IPC server messages into IPC messages. The IPC server(17,27) exchange IPC messages or inter IPC server messages each other through a PVC(Permanent Virtual Channel).
Patent KR-20020051656-A (KR)
Title: Resource assinment method in mobile communication systems
Inventor: KIM HYEON JEONG
IPC: H04L12/56
Filed: 2000-12-23
Abstract: PURPOSE: A method for allocating resources in a mobile system is provided to make a quick fault recovery by making a Node B reallocate a resource having a fault in case that the fault is generated in the Node B. CONSTITUTION: If an RNC(Radio Network Controller) transmits a cell setup request message to the software of a Node B in a UMTS(Universal Mobile Telecommunication System) using an NBAP(Node B Application Protocol)(S100), the software of the Node B stores channel creation information based on the cell setup request message. Then the software of the Node B transmits a channel creation command message to the hardware of the Node B(S101). And the software of the Node B transmits a cell setup response message to the RNC(S102). Receiving the cell setup response message, the RNC transmits a common transport channel setup request message to the software of the Node B(S103). The software of the Node B stores channel creation information dependent on the common channel setup request message. Then the software of the Node B transmits a channel creation command message to the hardware of the Node B(S104). And the software of the Node B transmits a common transport channel setup response message to the RNC(S105). In case that a fault is generated at the hardware of the Node B, a fault generation indication message is transferred to the software of the Node B(S106). The software of the Node B looks for a channel allocated to the fault resource. In case that a major channel has been allocated to the fault resource, the software of the Node B reallocates a resource not having a fault using the stored channel creation information and creates a channel(S107). Then the software of the Node B transmits a resource status indication message to the RNC using the NBAP(S108).
Patent KR-20020055683-A (KR)
Title: Suspension mount rubber of shock absorber for automobile
Inventor: LEE EUN BONG
IPC: B60G15/07
Filed: 2000-12-29
Abstract: PURPOSE: A suspension mount rubber of a shock absorber for a car is provided to improve a riding feeling and a handling performance by inserting and fixing a rubber ring for preventing damage of a base shell due to excessive compression of the shock absorber and mounting a valve to maintain a predetermined air inside a suspension mount rubber. CONSTITUTION: A suspension mount rubber of a shock absorber for a car a rubber ring(16) and a valve(17). The rubber ring is in the form of a bellows and inserted and fixed to prevent damage of a base shell(18) due to excessive compression of a shock absorber(10). The valve makes a predetermined air be maintained inside a suspension mounter rubber.
Patent KR-20020056214-A (KR)
Title: Preparation method of catalyst for olefin polymerization
Inventor: KIM IL SEOP
IPC: C08F4/658
Filed: 2000-12-29
Abstract: PURPOSE: Provided is a method for simply producing a catalyst for olefin polymerization which can improve the activity of catalyst and stereoregularity of produced polymer, and which is easy to control a particle size, while distribution range of the catalyst particles is narrow. CONSTITUTION: The method comprises the steps of (i) dissolving a nonreductive magnesium halide compound and group IIIA compound of periodic table in a mixed solvent of cyclic ether, 1 or more of alcohol, phosphorus compound and organic silane in the presence or absence of hydrocarbon solvents to produce a magnesium compound solution; (ii) reacting a titanium compound, silicon compound, tin compound or mixture thereof into the magnesium compound solution to produce a carrier; and (iii) reacting the carrier with titanium compound and electron donor to produce a solid complex titanium catalyst for alpha olefin polymerization. The particle size of the catalyst is adjusted by controlling solubility of reactants in either of step(ii) or (iii), or in both of steps (ii) and (iii).
Patent KR-20020058207-A (KR)
Title: Lead frame and semiconductor package using it
Inventor: KIM DONG SEOK
IPC: H01L23/495
Filed: 2000-12-29
Abstract: PURPOSE: A lead frame and a semiconductor package using the same are provided to form a solder plating layer of high quality by removing easily flash generated from a sealing process. CONSTITUTION: A tie bar(13) is extended from four edges of a chip loading plate(11) to the outside. A plurality of inner leads(12) are arranged on an outer circumference of the chip loading plate(11). A dam bar(14) is installed at the outsides of the inner leads(12). A plurality of outer leads(15) are extended to the outside of the dam bar(14). The tie bar(13) and the outer leads(15) are connected with a frame(16). A plurality of partial etching portions(11a,12a) are formed around the chip loading plate(11). A silver plating layer is formed on lower faces of the inner leads(12) and the chip loading plate(11).
Patent KR-20020058973-A (KR)
Title: Right Position Fixing Unit of non-circule Special Merchining Material and Method
Inventor: KIM SEONG HYEON
IPC: B23Q3/00
Filed: 2000-12-30
Abstract: PURPOSE: A method and an apparatus for fixing a non-circular special workpiece are provided to automatically arrange the non-circular special workpiece to a normal position by rotating the non-circular special workpiece at a predetermined angle such that a gripper can grip the non-circular special workpiece. CONSTITUTION: A rotating motor(110) is installed at a lower end of a stocker for rotating the stocker. A sensor(120) is arranged at one side of a non-circular workpiece so as to measure the distance of the non-circular workpiece. A central processing unit(130) is provided to arrange the distance between the sensor(120) and the non-circular workpiece. The central processing unit(130) determines whether distance of the non-circular workpiece is matched with the predetermined distance and operates the rotating motor(110) until the distance of the non-circular workpiece is matched with the predetermined distance.
Patent KR-20010024103-A (KR)
Title: 회전 가능한 지지 바디를 갖춘 라인들을 안내하는 안내장치 및 안내부재
IPC: H02G11/00
Filed: 1998-09-16
Abstract: 본 발명은 라인 또는 도관들을 수용하기 위해 통로부(5)를 갖는 안내부재(1)에 관한 것이다. 상기 통로부(5)는 적어도 하나의 연결부재(4)에 의해서 연결되는 두 측벽(2,3)으로 한정된다. 상기 두 벽(2,3)들은 서로 마주보며 이격된 상태로 배열된다. 지지 부재(6,7)들은 통로부(5)내에 회전가능하게 장착된다. 각 지지 바디(6,7)속으로 장착 저어널들의 일부가 돌출하며, 상기 장착 저어널들은 어댑터(14a,14b,14a,14b)상에 제공된다.
Patent KR-20010030632-A (KR)
Title: 냉장고를 위한 이중 공급 증발기 시스템
IPC: F25D17/04
Filed: 1998-04-23
Abstract: 공개된 냉각장치는 이들사이에 단일 증발기(30)를 수용하는 플리넘 또는 덕트(36)를 가지는 냉장구획부(32)와 냉동구획부(34)와 반대방향에서 플리넘(36)을 통하여 공기흐름을 일으키는 하나이상의 팬과 상기 플리넘(36)을 통한 공기흐름패턴가 상기 플리넘(36)과 냉동구획부(34)를 통하여 공기흐름패턴을 선택하는 냉장구획부를 포함한다. 일방향 공기밸브(22,24,26,28)는 팬(20)의 반대측면에서 상기 플리넘(36)의 반대단부에 위치하고 냉장구획부와 플리넘사이를 교통하게 한다. 
     일방향 공기밸브는 공기흐름이 냉장구획부(32)내의 플리넘이나 플리넘(36)과 냉동구획부(34)중 하나를 통하여 선택적으로 공기가 흐르게 한다. 
     냉장구획부 냉각모드에서 작동하는 냉장구획부로부터 온 공기는 증발기 코일의 성에를 제거하도록 증발기 코일(30)위로 순환한다.
Patent KR-20010031140-A (KR)
Title: 정밀 형광염료 입자 및 그의 제조방법 그리고 그의 사용
IPC: C12Q1/68
Filed: 1998-10-14
Abstract: 본 발명은 비드 또는 마이크로스피어 등을 2종이상의 형광 염료로 각종 비로 염색하여 동시에 각종 개체군의 비드의 형광 시그널을 여기시키며, 이러한 비드의 표면에 분석시약을 결합하여 하나의 샘플중 복수의 검체를 동시에 분석할 수 있다.
Patent KR-20010031206-A (KR)
Title: Low-toxicity human interferon-alpha analog
IPC: A61P31/00
Filed: 1998-10-20
Abstract: The invention describes a method of reducing the cytotoxicity of interferon-alpha by making defined amino acid substitutions in the N-terminal portion of the polypeptide sequence. Also described are human interferon-alpha analogs with low cytotoxicity, and therapeutic applications of the low toxicity interferon-alpha analogs.
Patent KR-20010031908-A (KR)
Title: 항암제로 유용한 티에노피리미딘 및 티에노피리딘 유도체
IPC: A61K31/4365
Filed: 1998-10-22
Abstract: 본 발명은 하기 화학식 1 및 하기 화학식 2의 화합물 및 이의 약학적으로 허용가능한 염 또는 수화물에 관한 것이다: 
     화학식 1 
     
       
     
     화학식 2 
     
       
     
     상기식에서, 
     X 1 , R 1 , R 2 및 R 11 은 본원에 정의된 바와 같다. 
     또한, 본 발명은 화학식 1 및 2의 화합물을 함유하는 약학 조성물 및 화학식 1 및 2의 화합물을 투여하여 포유동물의 과대증식 질병을 치료하는 방법에 관한 것이다.
Patent KR-20010032287-A (KR)
Title: Poly(vinylamine)-based superabsorbent gels and method of manufacturing the same
Inventor: MITCHELL MICHAEL A
IPC: C08F8/00
Filed: 1998-11-11
Abstract: Bi-component superabsorbent materials are disclosed. The superabsorbent materials comprise a mixture of about 20% to about 40%, by weight, poly-(vinylamine) polymer or other basic resin and about 60% to about 80%, by weight of an acidic water-absorbing polymer, like polyacrylic acid.
Patent KR-20010033348-A (KR)
Title: 플래시 메모리 디바이스의 소거 중에 대역 대 대역및/또는 애벌란시 전류를 감소시키는 바이어스 방법 및 구조
IPC: G11C16/14
Filed: 1998-12-18
Abstract: 본 발명은 플래시 EEPROM 메모리 셀의 소거 동안에 대역 대 대역 전류를 감소시키는 방법과 장치를 제공하는 것이다. 상기 장치는 상기 기판에 역 바이어스 연결을 구비하고, 상기 기판은 상기 플래시 EEPROM 메모리 셀의 소거 동안에 바이어스 전압이 인가된다. 상기 방법은 상기 플래시 EEPROM 메모리 셀의 소거 동안에 상기 바이어스 전압을 상기 역 바이어스 연결에 인가하는 것으로서, 상기 방법은 상기 플래시 메모리 셀의 소거 동안에 상기 소스 영역과 상기 기판간의 대역 대 대역 전류를 감소시킨다. 상기 감소는 손실 쇼트 채널 효과를 유도함이 없이 플래시 메모리 셀에서의 게이트 크기 감소를 제공한다.
Patent KR-20010043190-A (KR)
Title: 질병 치료용 ｓＰＬＡ2 억제제 화합물
IPC: A61P43/00
Filed: 1999-04-20
Abstract: 본 발명은 1H-인돌-3-글리옥실아미드 sPLA 2 억제제와 같은 치료 유효량의 sPLA 2 억제제를 염증성 장질환의 치료가 필요한 인간에게 투여하여 염증성 장질환을 치료하는 방법에 관한 것이다.
Patent KR-20010043719-A (KR)
Title: 액체 분배 장치
IPC: B43K8/02
Filed: 1999-05-12
Abstract: 본 발명은 일단에 마우스피스 및 연장 캡을 구비하고, 타단에 오리피스로부터 확대되는 측면에 의해 경계가 한정되는 확대 챔버와 연통하는 오리피스를 가지는 노즐을 구비하는 관형 케이싱을 포함하는 액체 분사 장치에 관한 것이다.  펜 몸체부의 측면과 케이싱의 내부 벽면 사이에 공기 유동 통로를 형성하기 위해, 케이싱의 내부 벽면으로부터 이격된 펜 몸체부의 측면을 구비하는 케이싱 내에, 연장 몸체부 및 흡수 펜촉(예컨대, 펠트펜)을 포함하는 액체 공급원이 위치한다.  노즐 오리피스 내측 또는 가장 근접하여 액체 공급원의 상기 펜촉을 위치시키도록 연장 몸체부의 표면이 대항하여 접촉할 수 있는 제 1 멈춤 수단, 및 연장 캡의 일단을 비교적 기밀하게, 그리고 연장 캡의 타단을 폐쇄시키는 방법으로 상기 액체 공급원의 상기 펜촉을 위치시키도록 상기 연장 몸체부의 후방 단부가 대항하여 접촉할 수 있는 케이싱 내부의 제 2 멈춤 수단을 포함하며, 케이싱 노즐 내측 또는 케이싱 노즐에 가장 근접하게, 또는 장치를 이용하지 않는 경우 연장 캡 내부에서 펜촉이 효과적으로 밀봉되게 액체 공급원의 상기 펜촉을 선택적으로 위치할 수 있다
Patent KR-20010052383-A (KR)
IPC: C07K14/55
Filed: 1999-05-21
Abstract: The present invention concerns materials and methods relating to the expression of genes. In particular, it relates to the expression of multiple gene products as a single cistron. The invention is achieved by constructing a nucleic acid construct comprising a first sequence encoding a first polypeptide (such as a protein subunit) and a second sequence encoding a second polypeptide (a further protein subunit), said first and second sequences being separated by a linker sequence encoding an endoprotease cleavage site. Once expressed as a single fusion protein it can be cleaved and processed into its constituent, biologically active, first and second polypeptides. The invention has particular implications with regard to expression of proteins that have multiple subunits (e.g. IL-12) that require expression of the independent subunits at equimolar amounts.
Patent KR-20010100759-A (KR)
Title: 분말체 수납용기, 분말체 배출장치 및 화상형성장치
IPC: B65D77/06
Filed: 2001-01-04
Abstract: 본 발명은 유연성이 있 되, 세워서 사용하여도 쉽게 넘어지지 않는 분말체 수납 용기, 그 용기를 사용한 분말체 배출 장치 및 화상 형성 장치에 관한 것이다. 
     토너 수납 용기(1)가 토너의 분말체를 수납하는 변형 가능한 주머니체(2)와, 그 주머니체(2)를 세트한 상태로 그 자세를 유지시키는 수단을 구비하고 있다.
Patent KR-20010070410-A (KR)
Title: Absorptive article having water-decomposable property
Inventor: KURATA NOBUHIRO
IPC: A61F13/551
Filed: 2001-01-05
Abstract: PURPOSE: To solve such a problem that it is difficult for a conventional hydrolyzable absorbent article to prevent leakage from the back side. CONSTITUTION: This hydrolyzable absorbent article 1 comprises a hydrolyzable back layer 12, a hydrolyzable and liquid permeable surface layer 10 and a hydrolyzable absorbing layer 11 held between the back layer 12 and the surface layer 10. The absorbing layer 11 is formed out of at least one sheet with a water soluble or water swollen polymeric compound layer 21 and a hydrolyzable fiber layer 20 laminated in one unit, the fiber layer 20 being located at the side of the surface layer 10. Humors, which are first absorbed and diffused into the fiber layer 20, are free from concentration at one place and transfer to the polymeric compound layer 21. Leakage to the back side is thus effectively prevented.
Patent KR-20020061131-A (KR)
Title: Method and apparatus for continuous measuring weight of articles
Inventor: LIM JU TAEK
IPC: G01G11/20
Filed: 2001-01-16
Abstract: PURPOSE: A method and system for continuous weighting of goods are provided to weigh the goods rapidly and accurately correspondingly with manufacturing speed. CONSTITUTION: A system includes a control device(11) storing basic information about goods to be tested and allowance of weight and executing information processing such as determination of propriety according to actual measurements of the goods; a conveyer device(20) loaded with the goods to convey; a weighing device(30) weighing the goods stopped on a test position of the conveyer device and transmitting the measurement to the control device; a stamping device(40) placed behind the weighing device and operated by processing signal of the control device to mark determination result on the goods having been weighed; and an assorting device(50) placed behind the conveyer device and operated by processing signal of the control device to assort and collect the goods according to the determination result.
Patent KR-20020063380-A (KR)
Title: System for forming a radio frequency network and method of operating the same
Inventor: KIM JI HYEONG
IPC: H04W16/00
Filed: 2001-01-29
Abstract: PURPOSE: A system for composing an RF(Radio Frequency) network and a driving method thereof are provided to reduce RF communication fault by mutual interference when many frequencies with a limited band are used by comparing and analyzing stored information, selecting candidate frequencies used in the frequency network, selecting an optimum frequency using a fuzzy theory among the selected candidate frequencies, and forming the frequency network. CONSTITUTION: An area dividing unit(1) divides a certain area according to the characteristic of the area and divides the first parameters associated with a frequency. The first storing unit(2) stores the first parameters divided in the area dividing unit(1). An area-classified frequency distributing unit(3) distributes an area-classified use frequency using the first parameters stored in the first storing unit(2), and sets the second parameters for defining a position coordinate between link areas in which the distributed frequency is used. The second storing unit(4) stores the second parameters set in the area-classified frequency distributing unit(3). A candidate frequency selecting unit(5) compares and analyzes the first parameters and the second parameters stored in the first storing unit(2) and the second storing unit(4), and selects candidate frequencies used when composing the link. An optimum frequency selecting unit(6) compares and analyzes the candidate frequencies selected in the candidate frequency selecting unit(5), and selects an optimum frequency. A link setting unit(7) sets a link using the optimum frequency selected in the optimum frequency selecting unit(6).
Patent KR-20010067592-A (KR)
Inventor: SEO JAE WOONG
Filed: 2001-02-19
Abstract: PURPOSE: The method for intermediating the cash back service using the wire/wireless Internet is provided for a client to buy goods with inexpensive price, to offer the cash back intermediation system that the real deal is generated between a member client and a member store, and to serve the advantage of the real deal to a user without limits of the time and place. CONSTITUTION: The member store issues a coupon and credit card slip, which shows the deal amount and serial number of the member client(1). The member client(2) connects to a server through the Internet or wireless cell-phone(3). The server asks to input the ID for the membership check of the member client via a display screen read from the first DB(5). If the member client is proved as a member, the second DB searches and reads the name, address, and telephone number of the member(6). The third DB requests for inputting the amount and serial number, which are marked on the coupon and credit card slip issued by the member store, checks if the inputted amount and serial number is matched with the amount and serial number saved on the forth DB(7). The member client checks the result via the Internet PC or wireless Internet cell-phone(8). After the check, the inputted contents are stored on the fifth DB(9). The member client requests the saved data via the wireless Internet cell-phone. The member store checks the asked data and offers the cash back service. The amount asked by the member client is subtracted and stored on the fifth DB.
Patent KR-20020067867-A (KR)
Inventor: YOON CHUNG HO
IPC: E02B7/40
Filed: 2001-02-19
Abstract: PURPOSE: Provided is self purification method up to integrity self-purification by maximizing purification function of polluted river. CONSTITUTION: The tiltable river purifying devices comprises the upper and lower gravel contacting tank, which inflow tank(C) and downstream are penetrated between tiltable dam(A) for stagnant water installed horizontally on the channel of upper stream and another radiation shielding tiltable dam(B) on its lower part. The tiltable dam(B) can be replaced with rubber type dam and which air blower pipe(G) is constructed on the upper stream contacting tank(D) and the downstream contacting tank(E).
Patent KR-20010082755-A (KR)
Title: Process for purifying difluoromethane
Inventor: SUZUKI YASUHIRO
IPC: C07C19/08
Filed: 2001-02-22
Abstract: PURPOSE: To provide a method for purifying difluoromethane from a mixture containing the difluoromethane and hydrogen fluoride. CONSTITUTION: At least one kind selected from dichloromethane and chlorofluoromethane is used as an extractant.
Patent KR-20020069525-A (KR)
Title: Cableless optical communication device
Inventor: CHEI JAE HYUK
IPC: H04B10/11
Filed: 2001-02-26
Abstract: PURPOSE: A wireless optical transmission apparatus is provided to carry out data communication through the air using a laser, without using an optical cable. CONSTITUTION: A wireless optical transmission apparatus is comprised of an optical detection part(10), a signal processing part(20), an interface(30), and an optical output part(40). The optical output part(40) includes a laser driving part(32) and a laser generation part(34). The optical detection part(10) receives a laser beam supplied through the air and converts it into an electrical signal. The signal processing part(20) executes a filtering operation in order to obtain necessary data from the electrical signal. Also the signal processing part(20) executes signal processing for the output data transferred through the interface(30) and outputs a laser driving signal. The optical output part(40). The interface(30) transfers the data, obtained through the signal processing part(20), to a LAN. Also the interface(30) receives data from the LAN and transfers the received data to the signal processing part(20). The laser driving part(32) executes a switching operation according to the laser driving signal outputted from the signal processing part(20). The laser generation part(34) sends a laser beam to the air according to the switching operation of the laser driving part(32).
Patent KR-20020069664-A (KR)
Title: A ventilative system of a pig farm
Inventor: SHIN IL SIK
IPC: A01K1/02
Filed: 2001-02-27
Abstract: PURPOSE: A ventilation system of a hoggery is provided to uniformly distribute input air within the hoggery, to reduce a difference of temperature by heating and cooling the input outside air, and to adjust the amount of the input air, thus achieving optimal growing environment. CONSTITUTION: The ventilation system of a hoggery comprises an air suction part(31) communicating with a first heating chamber(23) defined between the roof(21) and the ceiling(24) and a side heating chamber(30), and a flap for adjusting the amount of input air and an anti-invasion grill are installed in the air suction part. A discharge pipe(25) penetrates from the interior space to the roof, and a baffle(26) and an exhaust fan(27) are installed at the upper and lower end of the discharge pipe. The side heating chamber is provided with the flap and a discharge pipe(50) to uniformly distribute the heated air within the hoggery.
Patent KR-20010044523-A (KR)
Inventor: PARK JUM SOON
IPC: F16L43/00
Filed: 2001-03-03
Abstract: PURPOSE: An elbow is composed of double pipe structure to have an insulator built in to prevent noise and freezing and dewing phenomena. CONSTITUTION: An elbow manufacturing method comprises a step to extrude an inner pipe(32) with stepped parts on both sides therein, a step to cover the periphery of the inner pipe(32) extruded with insulator(40) with a certain thickness, a step to extrude covers(38a, 38b) equally divided and having an engaging protrusion(38') and an engaging groove(38") on the upper and the lower ends thereof, a step to cover the insulator(40) covering the periphery of the inner pipe(32) with the covers(38a, 38b) to shelter and a step to extrude an outer pipe(34) on the inner pipe(32).
Patent KR-20020074254-A (KR)
Title: System for advertizing on screen
Inventor: CHO NAK HUN
Filed: 2001-03-19
Abstract: PURPOSE: An advertisement offering system is provided to transmit a moving picture of advertisement over a communication network, and to project the transmitted moving picture of the advertisement on a screen so that it can reproduce real time high quality image and sound at a low cost. CONSTITUTION: The system comprises a moving picture provision system(111), a control server(121), a plurality of set top boxes(131-1, 131-n), a plurality of sound amplifiers(141-1, 141-n), a plurality of screens(161-1, 161-n), and a plurality of projectors(151-1, 151-n). The moving picture provision system(111), including a personal computer and a moving picture receiver, offers moving picture data of advertisement. The control server(121) receives the moving picture data from the moving picture provision system(111), for example, over the internet and can be a VOD(Video On Demand) server. The set top boxes(131-1, 131-n), connected to the control server(121) over a communication network, receive the moving picture data from the control server(121) and convert/output the moving picture. The set top boxes(131-1, 131-n) include image data converters selectively activated by a remote control signal according to the kind of the moving picture. The control server(121) transmits the remote control signal with the moving picture data to the projectors(151-1, 151-n) via the set top boxes(131-1, 131-n). The sound amplifiers(141-1, 141-n), connected to the set top boxes(131-1, 131-n), amplify sound signals transmitted from the set top boxes(131-1, 131-n). The projectors(151-1, 151-n) project the moving picture, transmitted by the set top boxes(131-1, 131-n), on the screens(161-1, 161-n).