KR100528742B1 - Multi-party Conference Call Device of Exchange System - Google Patents
Multi-party Conference Call Device of Exchange System Download PDFInfo
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- KR100528742B1 KR100528742B1 KR1019980060841A KR19980060841A KR100528742B1 KR 100528742 B1 KR100528742 B1 KR 100528742B1 KR 1019980060841 A KR1019980060841 A KR 1019980060841A KR 19980060841 A KR19980060841 A KR 19980060841A KR 100528742 B1 KR100528742 B1 KR 100528742B1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
- H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
- H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
- H04M3/302—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop using modulation techniques for copper pairs
- H04M3/303—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop using modulation techniques for copper pairs and using PCM multiplexers, e.g. pair gain systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
- H04M2201/30—PCM
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Abstract
가.청구범위에 기재된 발명이 속한 기술분야The technical field to which the invention described in the claims belongs.
교환시스템의 다자간 회의통화장치에 관한 것이다.A multi-party conference call device of an exchange system.
나.발명이 해결하려고 하는 기술적 과제B. Technical problem to be solved
잡음의 영향을 제거하며, 가입자 확장이 소프트웨어적으로 이루어지도록 하는 교환시스템의 다자간 회의통화장치를 제공한다.It provides a multi-party conference call exchange system that eliminates the effects of noise and enables subscriber extension to be done in software.
다.발명의 해결방법의 요지C. Summary of the Solution
본 발명은 교환시스템의 다자간 회의통화장치에 있어서, 가입자 채널로부터 입력되는 CVSD신호를 입력받아 PCM데이터로 변환한 후, 서로 다른 타가입자의 PCM신호끼리 합산하여 다시 CVSD신호로 변환하여 상기 각 가입자 채널로 전송하는 디지털신호처리부와, 상기 디지털신호처리부의 초기화 및 동작제어 프로그램을 저장하고 있는 메모리부와, 상기 가입자 채널로부터 인가되는 CVSD신호의 상기 디지털신호처리부로의 입/출력을 인터페이싱하며, 상기 디지털신호처리부와 메모리부를 제어하기 위한 각종 제어신호를 발생하는 제어신호발생부를 포함하여 구성함을 특징으로 한다.The present invention provides a multi-party conference call apparatus of an exchange system, receives a CVSD signal input from a subscriber channel, converts it into PCM data, sums PCM signals of different subscribers, and converts each other to a CVSD signal. Interfacing the input / output of the digital signal processing unit transmitted to the digital signal processing unit, the memory unit storing the initialization and operation control program of the digital signal processing unit, and the CVSD signal applied from the subscriber channel to the digital signal processing unit, And a control signal generator for generating various control signals for controlling the signal processor and the memory.
라.발명의 중요한 용도D. Significant Uses of the Invention
교환시스템에 이용한다.Used for exchange system.
Description
본 발명은 교환시스템에 관한 것으로, 특히 교환시스템의 다자간 회의통화장치에 관한 것이다.The present invention relates to an exchange system, and more particularly to a multi-party conference call device of the exchange system.
요즈음 거의 대부분의 회사나 사무실 등에는 사설교환기가 설치되어 운영되고 있는데, 이러한 사설교환기의 대표적인 사용예로는 'PABX(Private Branch Exchanger)'와 '키폰시스템' 등이 있다. 상기한 사설교환기의 역할은 크게 구내 교환설비와 소속 전환 취급 구간의 전화회선(통상적으로 국선 이라 칭함)에 의해 국선의 연결 및 내선 가입자 상호간에 호를 연결시켜 주는 역할이다.Nowadays, most companies and offices have private exchanges installed and operated. Examples of such private exchanges include 'Private Branch Exchanger (PABX)' and 'Keyphone System'. The role of the private exchange is to connect a call between a trunk line and an extension subscriber by a telephone line (commonly referred to as a trunk line) of an internal exchange facility and a division switching handling section.
한편, 상기한 바와 같은 사설교환기에는 통상 회의통화기능(Conference)이 구현되어 수행되는데, 이는 상기 사설교환기에 미리 설정된 용량만큼 회의 그룹이 구성되고, 상기 그룹마다 소정수의 가입자가 자신의 단말을 이용 회의에 참여하여 상호간에 통화를 수행하는 기능을 말한다. 즉, 회의 그룹의 참여자는 각자가 송출하는 음성을 모두 다같이 들을 수 있으며, 언제라도 자신의 음성을 모든 참여자들에게 전달할 수 있는 기능이다. 이러한 회의기능은 상기 사설교환기 가입자들이 한 장소에서 모여 회의를 수행하지 못하는 경우에 전화단말을 통해서 상호간의 회의를 할 수 있도록 해주는 편리함을 가입자들에게 가져다 주었다.Meanwhile, a conference call function (Conference) is usually implemented in a private exchange as described above, and a conference group is configured by a capacity set in advance in the private exchange, and a predetermined number of subscribers use their terminals for each group. Participate in a conference and talk to each other. In other words, participants in a meeting group can hear all their voices together, and can deliver their voices to all participants at any time. This conferencing function has brought the convenience to the subscribers, which allows the private exchange subscribers to meet with each other via a telephone terminal when they cannot gather in one place.
도 1은 종래 교환시스템에서 회의통화기능을 위해 구비되는 회의통화장치의 블록 구성도를 도시한 것이다. 상기 도 1을 참조하면, 종래 회의통화장치는 다수의 CVSD(Continuously Variable Slope Delta modulation) 코덱(100,102,104)과 OP엠프(106,108,110)로 구성된다. 상기 CVSD 코덱들(100,102,104)은 다수의 가입자 채널로부터 입력되는 CVSD데이터를 디코딩하여 아날로그 신호로 변환하여 OP엠프(106,108,110)로 인가하며, 상기 OP엠프들(106,108,110)로부터 가산증폭되어 출력되는 아날로그 신호를 다시 CVSD데이터로 변환하여 해당 가입자 채널로 전송하여준다. 즉, 종래 회의통화장치는 다수의 가입자채널로부터 전송되는 CVSD데이터를 아날로그 신호로 변환시키며, OP엠프를 통해 가산증폭시킨 후, 상기 가산증폭된 아날로그 음성신호를 다시 CVSD데이터로 엔코딩하여 출력시킨다. 1 is a block diagram of a conference call apparatus provided for a conference call function in a conventional exchange system. Referring to FIG. 1, a conventional conference call device includes a plurality of CVSD (Continuously Variable Slope Delta Modulation) codecs 100, 102, 104, and OP amplifiers 106, 108, and 110. The CVSD codecs 100, 102, and 104 decode CVSD data input from a plurality of subscriber channels, convert them into analog signals, apply them to the OP amplifiers 106, 108, and 110, and add and amplify the analog signals output from the OP amplifiers 106, 108, and 110. The data is converted into CVSD data and transmitted to the corresponding subscriber channel. That is, the conventional conference call apparatus converts CVSD data transmitted from a plurality of subscriber channels into an analog signal, adds and amplifies through the OP amplifier, and then encodes and adds the added amplified analog voice signal to CVSD data.
그런데 상기한 바와 같은 종래 회의통화장치는 각 부로 전송되는 신호가 아날로그 신호이기 때문에 신호 전송과정에서 잡음이 쉽게 유입되며, 또한 가입자의 확장이 필요한 경우 하드웨어적으로 CVSD 코덱, OP엠프 등을 확장된 가입자 수만큼 추가로 구비시켜야 하는 문제점이 있었다. However, in the conventional conference call device as described above, since the signal transmitted to each part is an analog signal, noise is easily introduced during the signal transmission process. Also, if the subscriber needs to be expanded, the subscriber who has extended the CVSD codec, OP amplifier, etc. in hardware There was a problem to be provided as additional number.
상술한 바와 같이 종래 회의통화장치는 각 부에서 처리되는 신호가 아날로그 신호이기 때문에 신호 전송과정에서 잡음이 쉽게 유입되며, 또한 가입자의 확장이 필요한 경우 하드웨어적으로 CVSD코덱, OP엠프 등을 확장된 가입자 수만큼 추가로 구비하여야 함으로 인해 회로가 복잡해지는 문제점이 있었다.As described above, in the conventional conference call apparatus, since a signal processed in each unit is an analog signal, noise is easily introduced during a signal transmission process, and when a subscriber extension is required, a subscriber who extends a CVSD codec, an OP amplifier, etc. in hardware There is a problem in that the circuit is complicated by having to additionally provided as many.
따라서 본 발명의 목적은 회의통화기능을 위한 신호처리시 잡음의 영향을 줄이며, 추가의 가입자 확장이 용이하도록 한 교환시스템의 회의통화장치를 제공함에 있다.It is therefore an object of the present invention to provide a conference call device of a switching system that reduces the influence of noise in signal processing for a conference call function and facilitates additional subscriber extension.
상술한 목적을 달성하기 위한 교환시스템의 다자간 회의통화장치에 있어서, 가입자 채널로부터 입력되는 CVSD신호를 입력받아 PCM데이터로 변환한 후, 서로 다른 타가입자의 PCM신호끼리 합산하여 다시 CVSD신호로 변환하여 상기 각 가입자 채널로 전송하는 디지털신호처리부와, 상기 디지털신호처리부의 초기화 및 동작제어 프로그램을 저장하고 있는 메모리부와, 상기 가입자 채널로부터 인가되는 CVSD신호의 상기 디지털신호처리부로의 입/출력을 인터페이싱하며, 상기 디지털신호처리부와 메모리부를 제어하기 위한 각종 제어신호를 발생하는 제어신호발생부를 포함하여 구성함을 특징으로 한다.In the multi-party conference call apparatus of the switching system for achieving the above object, the CVSD signal inputted from the subscriber channel is received and converted into PCM data, and then the PCM signals of different subscribers are summed and converted into CVSD signals. Interfacing the input / output of the digital signal processing unit transmitting to each subscriber channel, the memory unit storing the initialization and operation control program of the digital signal processing unit, and the CVSD signal applied from the subscriber channel to the digital signal processing unit. And a control signal generator for generating various control signals for controlling the digital signal processor and the memory.
이하 본 발명의 바람직한 실시 예를 첨부한 도면을 참조하여 상세히 설명한다. 하기 설명 및 첨부 도면에서 많은 특정 상세들이 본 발명의 보다 전반적인 이해를 제공하기 위해 나타나 있다. 이들 특정 상세들없이 본 발명이 실시될 수 있다는 것은 이 기술분야에서 통상의 지식을 가진 자에게 자명할 것이다. 그리고 본 발명의 요지를 불필요하게 흐릴 수 있는 공지 기능 및 구성에 대한 상세한 설명은 생략한다. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description and the annexed drawings, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. And a detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.
도 2는 본 발명의 실시 예에 따른 교환시스템의 다자간 회의통화장치의 블록 구성도를 도시한 것이다. 상기 도 2를 참조하면, 제어신호발생부(204)는 3채널의 32kbps CVSD데이터를 입/출력하며, 각종 제어신호를 발생하여 디지털신호처리부(Digital Signal Processor: DSP)(200) 및 메모리부(202)를 제어한다. 디지털신호처리부(200)는 상기 제어신호발생부(204)로부터 입력되는 CVSD데이터를 PCM데이터로 변환한 후, 각 가입자 채널의 PCM데이터를 서로 다른 두명의 타가입자의 PCM데이터끼리 합산하여 다시 CVSD데이터로 변환하여 출력한다. 메모리부(202)는 디지털신호처리부(200)의 초기화 및 동작 프로그램을 저장하고 있다.2 is a block diagram of a multi-party conference call apparatus of an exchange system according to an exemplary embodiment of the present invention. Referring to FIG. 2, the control signal generator 204 inputs / outputs 32 kbps CVSD data of three channels, generates various control signals, and generates a digital signal processor (DSP) 200 and a memory unit ( 202 is controlled. The digital signal processor 200 converts the CVSD data input from the control signal generator 204 into PCM data, sums the PCM data of each subscriber channel with the PCM data of two different subscribers, and then adds the CVSD data again. Convert to and print it out. The memory unit 202 stores the initialization and operation programs of the digital signal processing unit 200.
도 3은 본 발명의 실시 예에 따른 상기 도 2의 디지털신호처리부(200)의 소프트웨어 기능블록도를 도시한 것이다. 상기 도 3을 참조하면, 디지털신호처리부(200)는 CVSD디코더부(300,302,304)와 가산부(306) 및 CVSD엔코더부(308,310,312)의 소프트웨어 기능블록을 구비하여 각 가입자 채널로부터 입력되는 CVSD데이터를 PCM데이터로 변환시킨 후, 상기 디지털 PCM데이터의 신호처리를 수행한다. 따라서 종래 아날로그 신호를 처리함에 따른 잡음 유입을 방지하였으며, 신호처리를 소프트웨어적으로 처리함으로서 가입자 확장이 용이하도록 하였다. 3 illustrates a software functional block diagram of the digital signal processor 200 of FIG. 2 according to an exemplary embodiment of the present invention. Referring to FIG. 3, the digital signal processing unit 200 includes software function blocks of the CVSD decoder units 300, 302 and 304, the adder 306, and the CVSD encoder units 308, 310 and 312 to PCM the CVSD data inputted from each subscriber channel. After conversion to data, signal processing of the digital PCM data is performed. Therefore, the inflow of noise due to the processing of the conventional analog signal is prevented, and the signal processing is done by software to facilitate the expansion of subscribers.
이하 상기 디지털신호처리부(200)의 동작을 좀더 상세히 살펴보면, 각 가입자 채널로부터 다자간 회의통화를 위한 CVSD데이터가 상기 디지털신호처리부(200)로 입력되는 경우 상기 디지털신호처리부(200)는 먼저 CVSD디코더부(300,302,304)를 제어하여 상기 제어신호발생부(204)의 제어신호에 따라 32kbps CVSD데이터를 아래의 [수학식1]에 따라 그 크기에 해당하는 PCM데이터로 변환시킨다.Hereinafter, the operation of the digital signal processor 200 will be described in more detail. When CVSD data for a conference call from each subscriber channel is input to the digital signal processor 200, the digital signal processor 200 first starts the CVSD decoder. (300, 302, 304) is controlled to convert 32kbps CVSD data into PCM data corresponding to the size according to Equation 1 below in accordance with the control signal of the control signal generator 204.
이어 상기 변환된 3채널의 PCM데이터들은 가산부를 통하여 아래의 [수학식 2]에 따라 가산된다. Subsequently, the converted three channel PCM data are added according to Equation 2 below through an adder.
상기에서 특히, 가산시 상기 보상율을 어떻게 정하느냐에 따라 신호의 특성이 달라지는데 보상율은 최적의 신호특성이 되도록 하는 실험치로 결정하게 된다. 이때 통상적으로 사설교환시스템이 3명의 가입자간에 회의통화를 지원하는 경우를 예를 들면, 상기 PCM데이터의 가산은 제1,제2가입자채널의 PCM데이터를 가산하고, 제1,제3가입자채널의 PCM데이터를 가산하며, 제2,제3가입자채널의 PCM데이터를 가산하는 방식으로 이루어지는데, 이는 서로 다른 두명의 타가입자의 음성신호를 나머지 한명의 가입자에게 전송하기 위함이다. 따라서 가입자 채널 2 및 가입자 채널 3도 상기 [수학식 2]에 따라 가산된다. In particular, the characteristics of the signal vary depending on how the compensation rate is determined during addition, and the compensation rate is determined as an experimental value for the optimal signal characteristic. In this case, a private exchange system typically supports a conference call between three subscribers. For example, the addition of the PCM data adds the PCM data of the first and second subscriber channels, and the first and third subscriber channels. The PCM data is added, and the PCM data of the second and third subscriber channels is added to transmit the voice signals of two different subscribers to the other subscriber. Accordingly, subscriber channel 2 and subscriber channel 3 are also added according to Equation 2 above.
이어 상기 가산된 PCM데이터는 아래의 [수학식 3]에 따라 32kbps CVSD데이터로 변환되어 출력된다. Then, the added PCM data is converted into 32kbps CVSD data according to Equation 3 below and output.
이에 따라 회의통화장치를 통한 3자간 회의통화가 가능하게 된다.Accordingly, the three-way conference call is possible through the conference call device.
상술한 바와 같이 본 발명은 교환시스템에서 다자간 회의통화기능을 위한 신호처리를 디지털로 신호처리하도록 함으로써 다자간 회의통화기능을 위한 신호처리시 역변환에 따르는 잡음 유입을 제거할 수 있으며, 회선 증가시 소프트웨어의 변경만으로도 가입자 확장을 쉽게 수행할 수 있는 이점이 있다.As described above, according to the present invention, the signal processing for the multi-party conference call function is digitally processed in the switching system, thereby eliminating the influx of noise caused by the inverse transformation during the signal processing for the multi-party conference call function. There is an advantage that the subscriber extension can be easily performed by changing only.
도 1은 종래 교환시스템의 다자간 회의통화장치의 블록 구성도,1 is a block diagram of a conference conference apparatus of a conventional exchange system;
도 2는 본 발명의 실시 예에 따른 교환시스템의 다자간 회의통화장치의 블록 구성도,2 is a block diagram of a multi-party conference call device of an exchange system according to an embodiment of the present invention;
도 3은 상기 도 2의 다자간 회의통화기능을 위한 신호처리를 수행하는 디지털신호처리부의 기능블록도.3 is a functional block diagram of a digital signal processor for performing signal processing for the conference call function of FIG.
Claims (2)
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KR1019980060841A KR100528742B1 (en) | 1998-12-30 | 1998-12-30 | Multi-party Conference Call Device of Exchange System |
US09/474,370 US6522739B1 (en) | 1998-12-30 | 1999-12-29 | Apparatus and method for multi-access conference call in exchange system |
GB9930724A GB2346032B (en) | 1998-12-30 | 1999-12-29 | Apparatus and method for multi-access conference call in exchange system |
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KR1019980060841A KR100528742B1 (en) | 1998-12-30 | 1998-12-30 | Multi-party Conference Call Device of Exchange System |
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KR101403376B1 (en) * | 2011-05-20 | 2014-06-03 | 삼성탈레스 주식회사 | Apparatus and method for improving performance of voice engineering order wire |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS6141260A (en) * | 1984-08-02 | 1986-02-27 | Nec Corp | Private branch exchange for digital signal |
KR890016780A (en) * | 1988-04-30 | 1989-11-30 | 강진구 | How to digitally decode CVSD data to PCM data |
KR940008359A (en) * | 1992-09-28 | 1994-04-29 | 정용문 | Combined time switching and conference call in exchange |
KR960028664A (en) * | 1994-12-28 | 1996-07-22 | 김광호 | 64 × 64 bit switch circuit |
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JPS6141260A (en) * | 1984-08-02 | 1986-02-27 | Nec Corp | Private branch exchange for digital signal |
KR890016780A (en) * | 1988-04-30 | 1989-11-30 | 강진구 | How to digitally decode CVSD data to PCM data |
KR940008359A (en) * | 1992-09-28 | 1994-04-29 | 정용문 | Combined time switching and conference call in exchange |
KR960028664A (en) * | 1994-12-28 | 1996-07-22 | 김광호 | 64 × 64 bit switch circuit |
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