WO2003047288A1 - Videophone sans fil - Google Patents

Videophone sans fil Download PDF

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Publication number
WO2003047288A1
WO2003047288A1 PCT/KR2002/000610 KR0200610W WO03047288A1 WO 2003047288 A1 WO2003047288 A1 WO 2003047288A1 KR 0200610 W KR0200610 W KR 0200610W WO 03047288 A1 WO03047288 A1 WO 03047288A1
Authority
WO
WIPO (PCT)
Prior art keywords
section
signals
logic
wireless terminal
receives
Prior art date
Application number
PCT/KR2002/000610
Other languages
English (en)
Inventor
Jong-Boom Ra
Original Assignee
Mevisys, Inc.
Korea Advanced Institute Of Science And Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mevisys, Inc., Korea Advanced Institute Of Science And Technology filed Critical Mevisys, Inc.
Priority to AU2002246426A priority Critical patent/AU2002246426A1/en
Publication of WO2003047288A1 publication Critical patent/WO2003047288A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/16—WPBX [Wireless Private Branch Exchange]

Definitions

  • the present invention relates to a cordless videophone.
  • it relates to an apparatus that makes a visual telecommunication using a public switched telephone network ( PSTN) or an Internet protocol (IP) network to be possibly carried out on a wireless terminal.
  • PSTN public switched telephone network
  • IP Internet protocol
  • IMT-2000 international mobile telecommunications-2000
  • IP network a method of using an IP network
  • PSTN a method of using PSTN.
  • the method of using an IMT-2000 is based on the standard established by ITU and provides a high frequency band(2GHz) and a wide bandwidth (2Mb) .
  • the methods of visual telecommunication using a wired transmission can be basically classified into a method of using an IP network and a method of using PSTN.
  • an IP network In case of a method of using an IP network, it performs a visual telecommunication on Internet by using H.323, an ITU standard recommendation. And in case of a method of using PSTN, it performs a visual telecommunication on general telephone network by using H.324, an ITU standard recommendation.
  • FIG. 1 is a block diagram illustrating the structure of a conventional wired videophone using PSTN.
  • a wired videophone ( 10 ) comprises: a telephone line section(ll) that is connected to a terminal of the other party through PSTN(9); a logic section B(12), connected to telephone line section(ll), that modulates/demodulates the video and audio signals; a camera section(13) that photographs the images and transmits them to logic section B(12); a display section(14) that displays the video signals processed by logic section B(12); a keypad section (15) that receives input key-values and transmits them to logic section B(12); and a transmitting/receiving section(l ⁇ ) comprising a speaker section(18) that outputs the audio signals processed by logic section B(12) and a microphone section (17) that receives audio inputs and transmits them to logic section B(12).
  • the terminal itself modulates/demodulates the audio and
  • a wired videophone ( 10 ) described above has a disadvantage in usability since the terminal should be fixed at PSTN(9) or an IP network.
  • KR 10-1999- 047307 a wired/wireless compatible videophone using a mobile videophone discloses a technology of a videophone comprising: a mobile section that performs a wireless visual telecommunication by transmitting/receiving data to/from a mobile video terminal of the other party through wireless transmission network and modulating/demodulating the audio and video signals into digital signals or vice versa; and a fixed section, designed to be connected to the mobile section, that performs a visual telecommunication by transmitting/receiving data to/from a wired video terminal of the other party through wired telephone network and modulating/demodulating the audio and video signals.
  • each section can be separately operated as a mobile videophone and a wired telephone when they are separated, and it performs the function of audio/video input/output of a mobile videophone and the function of audio/video signal processing of a wired telephone compatibly when the sections are connected to each other .
  • the present invention is proposed to solve the problems of usability of the prior art mentioned above.
  • the present invention presents a cordless videophone comprising: a fixed station that is connected to PSTN or an IP network to transmit /receive audio and video data to/from the other party and wirelessly transmits/receives these data to/from a wireless terminal; and a wireless terminal that separates the data into audio signals and video signals and modulates/demodulates these signals for carrying out a visual telecommunication.
  • the present invention also presents a cordless videophone comprising: a fixed station that is connected to PSTN or an IP network to transmit /receive audio and video data to/from the other party, separates the data into audio signals and video signals, modulates/demodulates these signals, and wirelessly transmits/receives these signals to/from a wireless terminal; and a wireless terminal that transmit s /receives the audio and video signals for carrying out a visual telecommunication.
  • FIG. 1 is a block diagram illustrating the structure of a conventional wired videophone using PSTN.
  • FIG. 2 is a block diagram illustrating the structure of a cordless videophone using PSTN in accordance with the present invention.
  • FIG. 3 is a block diagram illustrating the structure of a cordless videophone using an IP network in accordance with the present invention.
  • the present invention comprises: a fixed station(30 or 40) that is connected to PSTN(9) or an IP network(8) to transmit /receive audio and video data to/from the other party and wirelessly transmits/receives these data to/from a wireless terminal (20 ) ; and a wireless terminal (20) that separates/combine the data into/from audio signals and video signals and modulates/demodulates these signals for carrying out a visual telecommunication.
  • an embodiment of the cordless videophone (A) in accordance with the present invention comprises a fixed station(30) wired to PSTN(9) and a wireless terminal (20) wirelessly communicating with the fixed station(30).
  • the fixed station (30) comprises a telephone line section(31) connected to PSTN(9) for data transmission/reception, a charging section(33) designed to be connected to power supply section(28) of a wireless terminal (20) for supplying electric power to the wireless terminal ( 20 ) , a keypad section(35) that receives input key-values and transfers them to logic section A(32), and an RF section (34) that modulates/demodulates the signals for the communication with the wireless terminal ( 20 ) .
  • the fixed station(30) further comprises a logic section A(32) that processes the key-values received by the keypad section(35), controls the charging section(33), communicates with PC(3 ⁇ ), processes the data received from the telephone line section(31) and the RF section(34), and connects them to each other.
  • a logic section A(32) that processes the key-values received by the keypad section(35), controls the charging section(33), communicates with PC(3 ⁇ ), processes the data received from the telephone line section(31) and the RF section(34), and connects them to each other.
  • a wireless terminal(20) comprises an RF section(21) that modulates/demodulates the signals for the communication with a fixed station (30), a logic section B(22), connected to RF section(21), that compresses digitized audio and video signals or vice versa and transmits/receives them, a power supply section (28) designed to be connected to the charging section(33) of the fixed station(30) for supplying electric power to the wireless terminal ( 20 ) , a camera section (23) that photographs images and transmits them to logic section B(22), a display section(24) that displays the images reconstructed by logic section B(22), a keypad section(25) that receives input key- values and transfers them to logic section B(22), a microphone section(26) that receives audio inputs and transfers them to logic section B(22), and a speaker section (27) that outputs the audio signals processed by logic section B(22) .
  • the fixed station(40) comprises a network line section(41) connected to an IP network(8) for data transmission/reception, a charging section(43) designed to be connected to power supply section(28) of a wireless terminal (20) for supplying electric power to the wireless terminal ( 20 ) , a keypad section (45) that receives input key-values and transfers them to logic section A(42), and an RF section(44) that modulates/demodulates the signals for the communication with the wireless terminal ( 20 ) .
  • the fixed station(40) further comprises a logic section A(42) that processes the key-values received by the keypad section(45), controls the charging section(43), communicates with PC(4 ⁇ ), processes the data received from the network line section(41) and the RF section(44), and connects them to each other.
  • a wireless terminal(20) comprises an RF section(21) that modulates/demodulates the signals for the communication with a fixed station(40), a logic section B(22), connected to RF section (21) , that compresses digitized audio and video or vice versa and transmits/receives them, a power supply section(28) designed to be connected to the charging section (43) of the fixed station(40) for supplying electric power to the wireless terminal (20 ) , a camera section(23) that photographs images and transmits them to logic section B(22), a display section(24) that displays the images reconstructed by logic section B(22), a keypad section (25) that receives input key-values and transfers them to logic section B(22), a microphone section (26) that receives audio inputs and transfers them to logic section B(22), and a speaker section(27) that outputs the audio signals processed by logic sect ion B ( 22 ) .
  • a cordless videophone (A) in accordance with the present invention can be operated in both cases. These applicability depends on how to construct the logic section A's(32, 42) and the logic section B(22) . In addition, the digitization and reconstruction of data, performed by logic section B(22) in FIG. 2 and FIG. 3, can be performed by logic section A's(32, 42) instead .
  • the digitization and reconstruction of data can be partially performed by logic section B(22) and logic section A's(32, 42) respectively.
  • the present invention provides a cordless videophone ' using the conventional PSTN(9) or an IP network(8) but using a wireless terminal(20) . And thus, it provides a convenient usability. In addition, it provides the function of a conventional audio-telephone as well as a visual telecommunication to maintain the compatibility with a conventional telephone.
  • the present invention provides an additional function of visual telecommunication.
  • Visual telecommunication can be carried out by initially setting a video option when making a phone call, or it can be switched from audio telecommunication during the communication.
  • the power supply section (28) of a wireless terminal (20) is charged through the charging sections(33, 43) of fixed stations(30, 40), and the fixed stations (30, 40) are operated by the communication with PCs (36, 46) through logic section A' s (32, 42) .
  • the present invention is based on the upcoming mobile videophone and the conventional wired videophone. Therefore, it is also applicable to a visual telecommunication based on a modem communication, a cable modem communication, or an asymmetric digital subscriber line (ADSL) technology on wired circumstances.
  • ADSL digital subscriber line
  • a cordless videophone in accordance with the present invention increases its usability and provides the convenience of mobile visual telecommunication within a certain range by making a wireless visual telecommunication possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Telephonic Communication Services (AREA)
  • Telephone Function (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un appareil permettant une télécommunication visuelle au moyen d'un réseau téléphonique commuté public (RTPC) ou un réseau à protocole Internet (IP), éventuellement sur un terminal sans fil. Actuellement deux types de vidéophone, tels qu'un vidéophone du type cellulaire IMT-2000 et un vidéophone classique câblé sur RTPC. Dans le cas d'un terminal IMT-2000, la télécommunication visuelle n'est pas encore intégralement utilisable et le vidéophone sans fil utilisant RTPC, qui est actuellement utilisé, présente un inconvénient d'utilisation car le terminal doit être fixé à RTPC.
PCT/KR2002/000610 2001-11-30 2002-04-08 Videophone sans fil WO2003047288A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002246426A AU2002246426A1 (en) 2001-11-30 2002-04-08 Cordless video phone

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2001/75400 2001-11-30
KR1020010075400A KR20030044588A (ko) 2001-11-30 2001-11-30 코드없는 영상전화기

Publications (1)

Publication Number Publication Date
WO2003047288A1 true WO2003047288A1 (fr) 2003-06-05

Family

ID=19716496

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2002/000610 WO2003047288A1 (fr) 2001-11-30 2002-04-08 Videophone sans fil

Country Status (3)

Country Link
KR (1) KR20030044588A (fr)
AU (1) AU2002246426A1 (fr)
WO (1) WO2003047288A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005025218A1 (fr) * 2003-09-06 2005-03-17 Zte Corporation Terminal de videophone et procede de realisation de ce terminal

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100487588B1 (ko) * 2002-07-30 2005-05-17 (주)비엠테크 듀얼모드 영상단말기 장치 및 영상통화방법

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05199328A (ja) * 1992-01-22 1993-08-06 Brother Ind Ltd 親子テレビ電話システム
KR20010039082A (ko) * 1999-10-28 2001-05-15 서평원 영상 휴대전화기를 이용한 유무선 겸용 영상전화기

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980019588U (ko) * 1996-10-04 1998-07-15 김광호 이동 가능한 화상 전화 시스템
KR100414422B1 (ko) * 2001-10-30 2004-01-13 (주)씨앤에스 테크놀로지 무선전화기와 연동 가능한 영상전화기

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05199328A (ja) * 1992-01-22 1993-08-06 Brother Ind Ltd 親子テレビ電話システム
KR20010039082A (ko) * 1999-10-28 2001-05-15 서평원 영상 휴대전화기를 이용한 유무선 겸용 영상전화기

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005025218A1 (fr) * 2003-09-06 2005-03-17 Zte Corporation Terminal de videophone et procede de realisation de ce terminal
CN100399821C (zh) * 2003-09-06 2008-07-02 中兴通讯股份有限公司 一种可视电话终端及其实现方法

Also Published As

Publication number Publication date
KR20030044588A (ko) 2003-06-09
AU2002246426A1 (en) 2003-06-10

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