WO2007119901A1 - Video call service system using a digital set-top box - Google Patents

Video call service system using a digital set-top box Download PDF

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Publication number
WO2007119901A1
WO2007119901A1 PCT/KR2006/002363 KR2006002363W WO2007119901A1 WO 2007119901 A1 WO2007119901 A1 WO 2007119901A1 KR 2006002363 W KR2006002363 W KR 2006002363W WO 2007119901 A1 WO2007119901 A1 WO 2007119901A1
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WO
WIPO (PCT)
Prior art keywords
signal
moip
top box
video
data
Prior art date
Application number
PCT/KR2006/002363
Other languages
French (fr)
Inventor
Hee Kee Lee
Original Assignee
Hee Kee Lee
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 Hee Kee Lee filed Critical Hee Kee Lee
Publication of WO2007119901A1 publication Critical patent/WO2007119901A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/478—Supplemental services, e.g. displaying phone caller identification, shopping application
    • H04N21/4788—Supplemental services, e.g. displaying phone caller identification, shopping application communicating with other users, e.g. chatting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working
    • H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
    • H04N7/147—Communication arrangements, e.g. identifying the communication as a video-communication, intermediate storage of the signals

Definitions

  • the present invention relates generally to a video call service system using a
  • the present invention relates to a video call service system using a digital set-top box, in which a user can hold a video call with a counterpart or can transmit or receive a TV program that is being viewed to or from the counterpart
  • a digital set-top box connected to a general telephone and a digital TV and connectable to an Internet network and a PSTN network.
  • Cable TV broadcasting has also been digitalized. In Europe, a number of countries, including France and England, provide digital cable broadcasting service or are prepared to provide the service. In the U.S.A., Japan, etc., digital cable broadcasting has begun or is being prepared for service.
  • Korean Digital Satellite Broadcasting who has been selected as a single service provider finished its test broadcasting and has entered real broadcasting. It is
  • CAS Cable Television System Operators
  • digitalized as described above is a digital set- top box market.
  • the background of the digital set-top box market that rapidly grows may include several factors. First of all, this is because the digital set-top box is required in order to receive digital broadcasting service.
  • the above-mentioned digital set-top box includes digital set-top boxes for cable
  • FIG. 1 is a diagrammatic representation of a satellite broadcasting (BS, CS), digital terrestrial broadcasting, and the like.
  • BS satellite broadcasting
  • CS digital terrestrial broadcasting
  • the conventional digital set-top box includes a tuner 101 for receiving broadcasts,
  • a demodulator 102 for converting an intermediate frequency (IF) signal filtered through the tuner 101 into a digital baseband signal and converting the digital baseband signal into MPEG TS data
  • a MPEG decoder 103 for decoding the MPEG TS data of the demodulator 102 into a video signal and an audio signal
  • a CPU 104 for combining the video and audio
  • the tuner 101 detects a broadcasting signal desired by the user from a
  • demodulator 102 converts the intermediate frequency signal into a digital baseband signal and outputs MPEG TS data to the MPEG decoder 103.
  • the MPEG decoder 103 decodes digital TP stream, separates the digital TP stream into a video signal and an audio signal, and various information data, and outputs the video signal and the audio signal, and various information data to the CPU 104.
  • the CPU 104 The CPU 104
  • the MPEG decoder converts the video signal, which is received from the MPEG decoder, into a format (a component, composite, a S terminal, etc.) that can be input to the TV, using a video encoder. Therefore, the user can view a broadcasting program through the TV screen.
  • the user interface unit 106 displays the menu screen on the TV screen or changes a channel so that the user can view broadcasting of other channel.
  • FIG. 2 is a block diagram of a general video telephone (a Multimedia Over Internet Protocol (MOIP).
  • the video telephone includes an Ethernet 201 for video call using an Internet network, a modem 202 to access a general PSTN network, a DSP 204 for IP.
  • Ethernet 201 for video call using an Internet network
  • modem 202 to access a general PSTN network
  • DSP 204 for DSP 204
  • a CPU 203 for combining RAW data in which video signals (H.263, H.264) and audio signals (G 729, G.711) are decoded, a voice signal, a
  • DTMF signal a ring-back tone
  • pieces of control data and converting the combined data into a signal that can be represented on a display device 205, and controlling a memory unit 207 for storing execution programs, font data, and so on, and a user interface
  • MOIP through Internet networks processes authentication, billing, etc., and gets
  • the MOIP processes physical parts of an Internet, TCP, and UDP through the Ethernet 201 so that the video signals (H.263, H.264) and the audio signals (G.729, G.711) enables video-telephone from a MOIP board to a MOIP board in a P2P method. Therefore, the video signals (H.263, H.264) and the audio signals (G.729, G.711) or a variety of control signals and information data can be input to or output from the MOIP board. Then
  • the DSP 204 decompresses compressed video signals (H.263, H.264) and compressed audio signals (G.729, G.711), of the data input to the MOIP board, into RAW data.
  • the MOIP can compress RAW data into the video signals (H.263, H.264) and the audio signals (G.729, G.711) through the user interface 205.
  • the MOIP displays decompressed RAW data (video) on the display device 206 in digital R.GB, LVDS or DVI form.
  • the audio signals (G.729, G.711) are decompressed into PCM data.
  • the decompressed PCM data are output through a speaker or a headphone through the
  • DAC for converting a digital signal into an analog signal so that a person can hear it.
  • data in which RAW data are compressed into the video signals (H.263, H.264) and the audio signals (G.729, G.711) may be sent to other MOIP through
  • a signal input to the modem 202 from the PSTN network is converted into PCM data through the modem 202.
  • a user can know
  • PCM data converted through the modem are output through the speaker or the headphone through the DAC for converting the digital signal (PCM data) into the analog signal so that
  • a telephone directory and call record IP setting can be set up through the user interface 205.
  • Input data can be seen through the display device 206.
  • the conventional digital set-top box and MOIP described above are independently constructed though they are usually installed at one space. Therefore, they occupy a large space and require a high cost. Furthermore, independent execution of the digital set-top
  • the present invention has been made in view of the above problems occurring in the prior art, and it is an object of the present invention to allow a user to hold a video call with a counterpart while viewing a digital TV.
  • Another object of the present invention is to allow a user to transmit a TV screen
  • Yet another object of the present invention is to allow a user to make a phone call with a counterpart using a general telephone or a general mobile phone through the MOIP set-top box of the present invention, which is connected to a network, anytime and anywhere at a low call charge.
  • a video call service system using a digital set-top box includes a tuner for receiving a broadcasting signal
  • a demodulator for converting an intermediate frequency (IF) signal filtered by the tuner
  • a digital baseband signal and then converting the digital baseband signal into MPEG TS data
  • a MPEG decoder for decoding the MPEG TS data of the demodulator into a video signal and an audio signal
  • an user interface for receiving the input and image from a user and transferring the input and image to a CPU
  • an Ethernet for performing a video call
  • a modem for using a PSTN network and a telephone
  • a MOIP DSP for decoding video signals (H.263, H.264) and audio signals (G.729, G.711) received
  • the present invention includes a tuner for receiving a broadcasting signal, a demodulator for converting an intermediate frequency (IF) signal filtered by the tuner into a digital
  • a MPEG decoder for decoding the MPEG TS data of the demodulator into a video signal and an audio signal
  • an user interface for receiving the input and image from a user
  • a modem for using a PSTN network and a telephone a MOIP DSP for decoding video signals (H.263, H.264) and audio signals (G.729, G.711) received through the Internet network and processing a voice signal, a DTMF signal, and a ring-back tone
  • the CPU that combines RAW data in which the video signals (H.263, H.264) and the audio signals (G.729, G.711) are decoded, a voice signal, a DTMF signal, a ring-back tone, pieces of control data, and video and audio signals output from the MPEG decoder and converts the combined data into a signal that can be represented on a TV and a general telephone, and controls a memory unit for storing execution programs, font data, protocols, and so on.
  • the CPU is constructed to control the driving of the MOIP DSP such that if there is a request for call from the general
  • the MOIP DSP confirms a password or a predetermined setting value and makes a telephone call to another MOIP set-top box through the Internet network, and if there is a call for a telephone call from another MOIP set-top box through the Internet network, the MOIP DSP connects another MOIP set-top box to the general telephone or the mobile phone through the PSTN network.
  • a video call service system using a digital set-top box includes a tuner for receiving a broadcasting signal, a demodulator
  • IF intermediate frequency
  • MPEG decoder for decoding the MPEG TS data of the demodulator into a video signal and an audio signal, an user interface for receiving the input and image from a user and transferring the input and image to a CPU, an Ethernet for performing a video call using an
  • a modem for using a PSTN network and a telephone a MOIP DSP that decodes video signals (H.263, H.264) and audio signals (G.729, G.711) received through the Internet network and processes a voice signal, a DTMF signal, and a ring-back tone
  • the CPU that combines RAW data in which the video signals (H.263, H.264) and the audio signals (G.729, G.711) are decoded, a voice signal, a DTMF signal, a ring-back tone, pieces of control data, and video and audio signals output from the MPEG decoder and converts the combined data into a signal that can be represented on a TV and a general telephone, and controls a memory unit for storing execution programs, font data, protocols, and so on.
  • the CPU is constructed to control the driving of the MOIP DSP such that if there is a request for a call from the general telephone or a mobile phone, the MOIP DSP confirms a password or a predetermined
  • the MOIP DSP connects another MOIP set-top box to a general telephone connected to a corresponding MOIP set-top box. Furthermore, a video call service system using a digital set-top box according to
  • the present invention includes a tuner for receiving a broadcasting signal, a demodulator
  • IF intermediate frequency
  • an audio signal an audio signal
  • an user interface for receiving the input and image from a user and transferring the input and image to a CPU
  • an Ethernet for performing a video call using an
  • decoding video signals H.263, H.264
  • audio signals G.729, G.711
  • video signals H.263, H.264
  • audio signals G.729, G.711
  • a voice signal a DTMF signal
  • a ring-back tone pieces of control data
  • the CPU is constructed to control the driving of the MOIP DSP such that if there is a request for call from the general
  • the MOIP DSP makes a telephone call to another MOIP set-top box through the Internet network, and if there is a call for a telephone call from another MOIP set-top box
  • the MOIP DSP connects another MOIP set-top box to the general telephone or a mobile phone through the PSTN network.
  • the CPU if there is a call for a telephone call from another MOIP set-top box, the CPU preferably controls the information to be displayed on a TV as an OSD or PIP screen.
  • the CPU may preferably transmit
  • the driving of the MOIP set-top box is controlled so that a user can record pictures, which are received and transmitted while making a telephone call to a counterpart through the MOIP set-top box, in a memory
  • a video call service system using a digital set-top box includes a tuner for receiving a broadcasting signal, a demodulator
  • IF intermediate frequency
  • an audio signal an user interface for receiving the input and image from a user and transferring the input and image to a CPU, an Ethernet for performing a video call using an Internet network, a modem for using a PSTN network and a telephone, a MOIP DSP for
  • decoding video signals H.263, H.264
  • audio signals G.729, G.711
  • video signals (H.263, H.264) and the audio signals (G.729, G.711) are decoded, a voice signal, a DTMF signal, a ring-back tone, pieces of control data, and video and audio signals output from the MPEG decoder and converts the combined data into a signal that can be represented on a TV and a general telephone, and controls a memory unit for storing
  • the CPU is constructed to control
  • the MOIP DSP calls another MOIP set-top box through the Internet network and transmits the
  • the MOIP DSP displays the TV program on a TV screen.
  • the CPU may be constructed to
  • a user can hold a video call with a counterpart while viewing a digital TV, can transmit a TV screen that is being viewed to a counterpart through a video telephone, and can make a phone call with a counterpart using a general telephone or a general mobile phone through the MOIP set-top box of the present
  • FIG. l is a block diagram of a general digital set-top box
  • FIG. 2 is a block diagram of a general video telephone
  • FIG. 3 is a block diagram of a video call service system using a digital set-top box according to the present invention.
  • FIG. 4 is a view showing the configuration of a network for video call service.
  • FIG. 3 is a block diagram of a video call service system using a digital set-top box according to the present invention.
  • the MOIP set-top box includes a tuner 31 for receiving a broadcasting signal, a demodulator 32 that converts an intermediate frequency
  • MPEG decoder 35 for decoding the MPEG
  • TS data of the demodulator 32 into a video signal and an audio signal an user interface 29 for receiving the input and image from a user and transferring the input and image to a CPU 38, an Ethernet 33 for performing a video call using an Internet network, a modem 34 for using a general PSTN network and a telephone 28, a MOIP DSP 36 that decodes video signals (H.263, H.264) and audio signals (G.729, G.711) received through the Internet network and processes a voice signal, a DTMF signal, and a ring-back tone received through the PSTN network, and the CPU 38 that combines RAW data in which the video
  • DTMF signal a ring-back tone
  • pieces of control data and video and audio signals output from the MPEG decoder 35 and converts the combined data into a signal that can be represented on a TV 39 and the telephone 28, and controls a memory unit 30 for storing execution programs, font data, protocols, and so on.
  • the tuner 31 detects a broadcasting signal desired by the user from a signal received through an antenna and filters an intermediate frequency signal from the broadcasting signal.
  • the demodulator 32 converts the
  • the MPEG decoder 35 decodes digital TP stream, separates the
  • the MOIP DSP 36 decompresses compressed video signals (H.263, H.264) and audio signals (G.729, G.711),
  • the MOIP DSP 36 digitally combines the video signal in which the TP stream has been decoded and the video signal in which the video signals (H.263, H.264) have been decoded and outputs the combined data to the TV 39 in a PIP form.
  • the audio signal that has been separated from the TP stream is sent to the TV 39 and the audio signals
  • a user can use the user interface 29 and the telephone 28 while making a telephone call or answering a call.
  • TV screen and pictures, or a variety of pieces of information, such as broadcasting signals and telephone information, can be displayed on the TV 39 at the same time.
  • PSTN network is converted into PCM data through the modem 34.
  • the PCM data are compressed into the audio signals (G.729, G.711) by the MOIP DSP 36.
  • a variety of control signals and information signals, such as DTMF signals and ring-back tone CID, are detected from the audio signals and are then transmitted to the CPU 38. With these information, the CPU38 can make a telephone call and transmit compressed audio signals
  • a call received through the Internet network can be received by a general telephone or a mobile phone through the PSTN network.
  • MOIP set-top box 41 confirms a password or a given setting value and calls a MOIP set-top box 44 through an Internet network 42. If there is a
  • the MOIP set-top box 41 connects the MOIP set-top box 44 to the general telephone 45 or the
  • the MOIP set-top box 41 confirms a password or a given setting value
  • the MOIP set-top box 41 connects the MOIP set-top box 44 to a general call connected to a corresponding MOIP set-top box 41.
  • the MOIP set-top box 41 makes a telephone call to another MOIP set-top box 44 through the Internet network 42, and if there is a call for a telephone call from another MOIP set-top box 44 through the Internet network 42, the MOIP set-top box 41 connects another MOIP set-top box 44 to the general telephone 45 or the mobile phone 40 through the PSTN network 43.
  • the information is displayed on a TV as an OSD or PIP screen. Therefore, a user can know that there is a call while viewing the TV.
  • the MOIP set-top box 41 can transmit pictures, which are received
  • a user can record pictures, which are received and transmitted while making a telephone call to a counterpart through the MOIP set-top box 41, in a memory unit or a recording device connected to the user interface.
  • MOIP set-top box 41 viewed to another MOIP set-top box 44 through a user interface is set up, the MOIP set-top box 41 calls another MOIP set-top box 44 through the Internet network 42 and transmits
  • the MOIP set-top box 41 displays the TV program on a TV screen. Even in this case, in the same manner as a video call, the MOIP set-top box 41 can
  • the recording device connected to the user interface.
  • a user can hold a video call with a counterpart while viewing a digital TV, can transmit a TV screen that is being viewed to a counterpart through a video telephone, and can make a phone call with a counterpart using
  • a general telephone or a general mobile phone through the MOIP set-top box of the present invention, which is connected to a network, anytime and anywhere at a low call charge.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Engineering & Computer Science (AREA)
  • Telephone Function (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

The present invention relates to a video call service system using a digital set-top box. The video call service system includes a tuner for receiving a broadcasting signal, a demodulator that converts an intermediate frequency (IF) signal filtered by the tuner into a digital baseband signal and then converts the digital baseband signal into MPEG TS data, a MPEG decoder for decoding the MPEG TS data of the demodulator into a video signal and an audio signal, an user interface for receiving the input and image from a user and transferring the input and image to a CPU, an Ethernet for performing a video call using an Internet network, a modem for using a PSTN network and a telephone, a MOIP DSP that decodes video signals C (H.263, H.264) and the audio signals (G.729, G.711) are decoded, a voice signal, a DTMF signal, a ring-back tone, pieces of control data, and video and audio signals output from the MPEG decoder and converts the combined data into a signal that can be represented on a TV and a general telephone, and controls a memory unit for storing execution programs, font data, protocols, and so on. Therefore, a user can hold a video call with a counterpart while viewing a digital TV, can transmit a TV screen that is being viewed to a counterpart through a video telephone, and can make a phone call with a counterpart using a general telephone or a general mobile phone through the MOIP set-top box of the present invention, which is connected to a network, anytime and anywhere at a low call charge.

Description

VIDEO CALL SERVICE SYSTEM USING A DIGITAL SET-TOP BOX
[Description]
[Technical Fieldl The present invention relates generally to a video call service system using a
digital set-top box. More particularly, the present invention relates to a video call service system using a digital set-top box, in which a user can hold a video call with a counterpart or can transmit or receive a TV program that is being viewed to or from the counterpart
through a digital set-top box connected to a general telephone and a digital TV and connectable to an Internet network and a PSTN network.
[Background Art]
First of all, with respect to terrestrial TV broadcasting, nationwide terrestrial digital TV broadcasting began at England first in the world. The four major American broadcasting companies began terrestrial digital TV broadcasting at major cities. Thereafter, major advanced countries, such as Japan, Germany and France, introduced the terrestrial digital TV broadcasting. In Korea, an experimental broadcasting began in the late 1990 and
a test broadcasting was performed on 2000. The terrestrial digital TV broadcasting is now performed partially. The digitalization of a satellite broadcasting came much earlier than the terrestrial
broadcasting. In the U.S.A., as Direc TV and USSB provide service using 150 channels and 25 channels, the digital satellite-broadcasting era has approached. In Europe, Canal+ of France has begun its first service. Thirteen countries including Kirch of Germany are providing digital satellite broadcasting service. In Japan, digital satellite broadcasting service using a communication satellite (SC) has begun almost simultaneously with Europe.
There is a tendency that digital satellite broadcasting subscribers continue to increase.
Cable TV broadcasting has also been digitalized. In Europe, a number of countries, including France and England, provide digital cable broadcasting service or are prepared to provide the service. In the U.S.A., Japan, etc., digital cable broadcasting has begun or is being prepared for service.
In Korea, terrestrial digital TV broadcasting that entered a test broadcasting in the
late 2003 has been serviced in the metropolitan area. Regarding digital satellite broadcasting, Korean Digital Satellite Broadcasting (KCB) who has been selected as a single service provider finished its test broadcasting and has entered real broadcasting. It is
also expected that Cable Television System Operators (CATV SO) will provide digital TV
broadcasting service in several years.
A technical field that has been in the spotlight as a broadcasting medium is
digitalized as described above is a digital set- top box market. The background of the digital set-top box market that rapidly grows may include several factors. First of all, this is because the digital set-top box is required in order to receive digital broadcasting service.
The above-mentioned digital set-top box includes digital set-top boxes for cable
TV, satellite broadcasting (BS, CS), digital terrestrial broadcasting, and the like. FIG. 1 is a
block diagram of a conventional digital set-top box.
The conventional digital set-top box includes a tuner 101 for receiving broadcasts,
a demodulator 102 for converting an intermediate frequency (IF) signal filtered through the tuner 101 into a digital baseband signal and converting the digital baseband signal into MPEG TS data, a MPEG decoder 103 for decoding the MPEG TS data of the demodulator 102 into a video signal and an audio signal, a CPU 104 for combining the video and audio
signals output from the MPEG decoder 103 and converting the combined signals into a signal that can be represented on the TV and controlling a memory unit 105 for storing execution programs, font data, a protocol, and so on, and a user interface 106 for
transferring a user's input to the CPU 104, as shown in FIG. 1.
In the conventional digital set-top box constructed above, if a user views digital
TV broadcasting, the tuner 101 detects a broadcasting signal desired by the user from a
signal received through an antenna and filters an intermediate frequency signal. Then the
demodulator 102 converts the intermediate frequency signal into a digital baseband signal and outputs MPEG TS data to the MPEG decoder 103.
The MPEG decoder 103 decodes digital TP stream, separates the digital TP stream into a video signal and an audio signal, and various information data, and outputs the video signal and the audio signal, and various information data to the CPU 104. The CPU 104
converts the video signal, which is received from the MPEG decoder, into a format (a component, composite, a S terminal, etc.) that can be input to the TV, using a video encoder. Therefore, the user can view a broadcasting program through the TV screen.
Furthermore, if the user presses a specific key for displaying a menu screen or a button of a Remote Control Unit (RCU), the CPU 104 that has received the user's input
through the user interface unit 106 displays the menu screen on the TV screen or changes a channel so that the user can view broadcasting of other channel.
FIG. 2 is a block diagram of a general video telephone (a Multimedia Over Internet Protocol (MOIP). The video telephone includes an Ethernet 201 for video call using an Internet network, a modem 202 to access a general PSTN network, a DSP 204 for
decoding video signals (H.263, H.264) and audio signals (G.729, G.711) received from the
Internet network and processing a voice signal, a DTMF signal, and a ring-back tone received through the PSTN network, a CPU 203 for combining RAW data in which video signals (H.263, H.264) and audio signals (G 729, G.711) are decoded, a voice signal, a
DTMF signal, a ring-back tone, and pieces of control data and converting the combined data into a signal that can be represented on a display device 205, and controlling a memory unit 207 for storing execution programs, font data, and so on, and a user interface
206 for transferring a user's input to the CPU 203. In the case where IP video call is held using the MOIP constructed above, the
MOIP, through Internet networks processes authentication, billing, etc., and gets
authentication from a server, by using WAN protocols such as PpoE, DHCP, and Static EP, and using SIP, H.323 protocols and etc. as server protocols. Thereafter, the MOIP processes physical parts of an Internet, TCP, and UDP through the Ethernet 201 so that the video signals (H.263, H.264) and the audio signals (G.729, G.711) enables video-telephone from a MOIP board to a MOIP board in a P2P method. Therefore, the video signals (H.263, H.264) and the audio signals (G.729, G.711) or a variety of control signals and information data can be input to or output from the MOIP board. Then
the DSP 204 decompresses compressed video signals (H.263, H.264) and compressed audio signals (G.729, G.711), of the data input to the MOIP board, into RAW data.
Furthermore, the MOIP can compress RAW data into the video signals (H.263, H.264) and the audio signals (G.729, G.711) through the user interface 205. The MOIP displays decompressed RAW data (video) on the display device 206 in digital R.GB, LVDS or DVI form. The audio signals (G.729, G.711) are decompressed into PCM data. The decompressed PCM data are output through a speaker or a headphone through the
DAC for converting a digital signal into an analog signal so that a person can hear it.
Furthermore, data in which RAW data are compressed into the video signals (H.263, H.264) and the audio signals (G.729, G.711) may be sent to other MOIP through
the Ethernet 201. A signal input to the modem 202 from the PSTN network is converted into PCM data through the modem 202. A variety of control signals and information signals, such as a DTMF signal and a ring-back tone CID, are detected. A user can know
display and counterpart information through the control signals and information signals. PCM data converted through the modem are output through the speaker or the headphone through the DAC for converting the digital signal (PCM data) into the analog signal so that
a person can hear it.
Furthermore, a telephone directory and call record IP setting can be set up through the user interface 205. Input data can be seen through the display device 206. The conventional digital set-top box and MOIP described above are independently constructed though they are usually installed at one space. Therefore, they occupy a large space and require a high cost. Furthermore, independent execution of the digital set-top
box or the MOIP is limited in terms of a function.
[Disclosure]
[Technical Problem]
Accordingly, the present invention has been made in view of the above problems occurring in the prior art, and it is an object of the present invention to allow a user to hold a video call with a counterpart while viewing a digital TV.
Another object of the present invention is to allow a user to transmit a TV screen
that is being viewed to a counterpart through a video telephone.
Yet another object of the present invention is to allow a user to make a phone call with a counterpart using a general telephone or a general mobile phone through the MOIP set-top box of the present invention, which is connected to a network, anytime and anywhere at a low call charge.
[Technical Solution]
To achieve the above objects, a video call service system using a digital set-top box according to the present invention includes a tuner for receiving a broadcasting signal,
a demodulator for converting an intermediate frequency (IF) signal filtered by the tuner
into a digital baseband signal and then converting the digital baseband signal into MPEG TS data, a MPEG decoder for decoding the MPEG TS data of the demodulator into a video signal and an audio signal, an user interface for receiving the input and image from a user and transferring the input and image to a CPU, an Ethernet for performing a video call
using an Internet network, a modem for using a PSTN network and a telephone, a MOIP DSP for decoding video signals (H.263, H.264) and audio signals (G.729, G.711) received
through the Internet network and processing a voice signal, a DTMF signal, and a ring- back tone received through the PSTN network, and the CPU that combines RAW data in which the video signals (H.263, H.264) and the audio signals (G.729, G.711) are decoded, a voice signal, a DTMF signal, a ring-back tone, pieces of control data, and video and audio signals output from the MPEG decoder and converts the combined data into a signal that can be represented on a TV and a general telephone, and controls a memory unit for storing execution programs, font data, protocols, and so on.
Furthermore, a video call service system using a digital set-top box according to
the present invention includes a tuner for receiving a broadcasting signal, a demodulator for converting an intermediate frequency (IF) signal filtered by the tuner into a digital
baseband signal and then converting the digital baseband signal into MPEG TS data, a MPEG decoder for decoding the MPEG TS data of the demodulator into a video signal and an audio signal, an user interface for receiving the input and image from a user and
transferring the input and image to a CPU, an Ethernet for performing a video call using an
Internet network, a modem for using a PSTN network and a telephone, a MOIP DSP for decoding video signals (H.263, H.264) and audio signals (G.729, G.711) received through the Internet network and processing a voice signal, a DTMF signal, and a ring-back tone
received through the PSTN network, and the CPU that combines RAW data in which the video signals (H.263, H.264) and the audio signals (G.729, G.711) are decoded, a voice signal, a DTMF signal, a ring-back tone, pieces of control data, and video and audio signals output from the MPEG decoder and converts the combined data into a signal that can be represented on a TV and a general telephone, and controls a memory unit for storing execution programs, font data, protocols, and so on. The CPU is constructed to control the driving of the MOIP DSP such that if there is a request for call from the general
telephone or a mobile phone, the MOIP DSP confirms a password or a predetermined setting value and makes a telephone call to another MOIP set-top box through the Internet network, and if there is a call for a telephone call from another MOIP set-top box through the Internet network, the MOIP DSP connects another MOIP set-top box to the general telephone or the mobile phone through the PSTN network.
Furthermore, a video call service system using a digital set-top box according to the present invention includes a tuner for receiving a broadcasting signal, a demodulator
for converting an intermediate frequency (IF) signal filtered by the tuner into a digital baseband signal and then converting the digital baseband signal into MPEG TS data, a
MPEG decoder for decoding the MPEG TS data of the demodulator into a video signal and an audio signal, an user interface for receiving the input and image from a user and transferring the input and image to a CPU, an Ethernet for performing a video call using an
Internet network, a modem for using a PSTN network and a telephone, a MOIP DSP that decodes video signals (H.263, H.264) and audio signals (G.729, G.711) received through the Internet network and processes a voice signal, a DTMF signal, and a ring-back tone
received through the PSTN network, and the CPU that combines RAW data in which the video signals (H.263, H.264) and the audio signals (G.729, G.711) are decoded, a voice signal, a DTMF signal, a ring-back tone, pieces of control data, and video and audio signals output from the MPEG decoder and converts the combined data into a signal that can be represented on a TV and a general telephone, and controls a memory unit for storing execution programs, font data, protocols, and so on. The CPU is constructed to control the driving of the MOIP DSP such that if there is a request for a call from the general telephone or a mobile phone, the MOIP DSP confirms a password or a predetermined
setting value and makes a telephone call to another MOIP set-top box through the Internet network, and if there is a call for a telephone call from another MOIP set-top box through
the Internet network, the MOIP DSP connects another MOIP set-top box to a general telephone connected to a corresponding MOIP set-top box. Furthermore, a video call service system using a digital set-top box according to
the present invention includes a tuner for receiving a broadcasting signal, a demodulator
for converting an intermediate frequency (IF) signal filtered by the tuner into a digital
baseband signal and then converting the digital baseband signal into MPEG TS data, a MPEG decoder for decoding the MPEG TS data of the demodulator into a video signal and
an audio signal, an user interface for receiving the input and image from a user and transferring the input and image to a CPU, an Ethernet for performing a video call using an
Internet network, a modem for using a PSTN network and a telephone, a MOIP DSP for
decoding video signals (H.263, H.264) and audio signals (G.729, G.711) received through the Internet network and processing a voice signal, a DTMF signal, and a ring-back tone
received through the PSTN network, and the CPU that combines RAW data in which the
video signals (H.263, H.264) and the audio signals (G.729, G.711) are decoded, a voice signal, a DTMF signal, a ring-back tone, pieces of control data, and video and audio
signals output from the MPEG decoder and converts the combined data into a signal that can be represented on a TV and a general telephone, and controls a memory unit for storing execution programs, font data, protocols, and so on. The CPU is constructed to control the driving of the MOIP DSP such that if there is a request for call from the general
telephone, the MOIP DSP makes a telephone call to another MOIP set-top box through the Internet network, and if there is a call for a telephone call from another MOIP set-top box
through the Internet network, the MOIP DSP connects another MOIP set-top box to the general telephone or a mobile phone through the PSTN network.
Furthermore, according to the present invention, if there is a call for a telephone call from another MOIP set-top box, the CPU preferably controls the information to be displayed on a TV as an OSD or PIP screen.
Furthermore, according to the present invention, the CPU may preferably transmit
pictures, which are received through a user interface, to another MOIP set-top box and
output pictures, which are received from another MOIP set-top box, through a TV or the user interface.
Furthermore, according to the present invention, the driving of the MOIP set-top box is controlled so that a user can record pictures, which are received and transmitted while making a telephone call to a counterpart through the MOIP set-top box, in a memory
unit or a recording device connected to an user interface. Furthermore, a video call service system using a digital set-top box according to the present invention includes a tuner for receiving a broadcasting signal, a demodulator
for converting an intermediate frequency (IF) signal filtered by the tuner into a digital baseband signal and then converting the digital baseband signal into MPEG TS data, a MPEG decoder for decoding the MPEG TS data of the demodulator into a video signal and
an audio signal, an user interface for receiving the input and image from a user and transferring the input and image to a CPU, an Ethernet for performing a video call using an Internet network, a modem for using a PSTN network and a telephone, a MOIP DSP for
decoding video signals (H.263, H.264) and audio signals (G.729, G.711) received through the Internet network and processing a voice signal, a DTMF signal, and a ring-back tone received through the PSTN network, and the CPU that combines RAW data in which the
video signals (H.263, H.264) and the audio signals (G.729, G.711) are decoded, a voice signal, a DTMF signal, a ring-back tone, pieces of control data, and video and audio signals output from the MPEG decoder and converts the combined data into a signal that can be represented on a TV and a general telephone, and controls a memory unit for storing
execution programs, font data, protocols, and so on. The CPU is constructed to control
the driving of the MOIP DSP such that if transmission mode for transmitting a TV program
that is being viewed to another MOIP set-top box through the user interface is set up, the MOIP DSP calls another MOIP set-top box through the Internet network and transmits the
TV program that is being viewed to another MOIP set-top box. If a TV program is received from another MOIP set-top box through the Internet network, the MOIP DSP displays the TV program on a TV screen.
Furthermore, according to the present invention, the CPU may be constructed to
control the driving of the MOIP DSP such that the MOIP DSP records a TV program received from another MOIP set-top box in a memory unit or a recording device connected
to the user interface.
[Advantageous Effects] Therefore, according to the present invention, a user can hold a video call with a counterpart while viewing a digital TV, can transmit a TV screen that is being viewed to a counterpart through a video telephone, and can make a phone call with a counterpart using a general telephone or a general mobile phone through the MOIP set-top box of the present
invention, which is connected to a network, anytime and anywhere at a low call charge.
[Description of Drawings]
FIG. l is a block diagram of a general digital set-top box; FIG. 2 is a block diagram of a general video telephone; FIG. 3 is a block diagram of a video call service system using a digital set-top box according to the present invention; and
FIG. 4 is a view showing the configuration of a network for video call service.
[Mode for Invention]
Hereinafter, the present invention will be described in detail.
FIG. 3 is a block diagram of a video call service system using a digital set-top box according to the present invention.
The MOIP set-top box according to the present invention includes a tuner 31 for receiving a broadcasting signal, a demodulator 32 that converts an intermediate frequency
(IF) signal filtered by the tuner 31 into a digital baseband signal and then converts the
digital baseband signal into MPEG TS data, a MPEG decoder 35 for decoding the MPEG
TS data of the demodulator 32 into a video signal and an audio signal, an user interface 29 for receiving the input and image from a user and transferring the input and image to a CPU 38, an Ethernet 33 for performing a video call using an Internet network, a modem 34 for using a general PSTN network and a telephone 28, a MOIP DSP 36 that decodes video signals (H.263, H.264) and audio signals (G.729, G.711) received through the Internet network and processes a voice signal, a DTMF signal, and a ring-back tone received through the PSTN network, and the CPU 38 that combines RAW data in which the video
signals (H.263, H.264) and the audio signals (G.729, G.711) are decoded, a voice signal, a
DTMF signal, a ring-back tone, pieces of control data, and video and audio signals output from the MPEG decoder 35 and converts the combined data into a signal that can be represented on a TV 39 and the telephone 28, and controls a memory unit 30 for storing execution programs, font data, protocols, and so on.
In the case where a user holds a video call while viewing digital broadcasting using the MOIP set-top box constructed above, the tuner 31 detects a broadcasting signal desired by the user from a signal received through an antenna and filters an intermediate frequency signal from the broadcasting signal. The demodulator 32 converts the
intermediate frequency signal into a digital baseband signal and outputs MPEG TS data to the MPEG decoder 35. The MPEG decoder 35 decodes digital TP stream, separates the
digital TP stream into a video signal, an audio signal, and pieces information data, and
sends them to the CPU 38.
Furthermore, as described above with reference to FIG. 2, the MOIP DSP 36 decompresses compressed video signals (H.263, H.264) and audio signals (G.729, G.711),
which are received through the Ethernet 33, into RAW data, and compresses the RAW data, which are received through the user interface 29, into video signals (H.263, H.264) and
audio signals (G729, G711).
The MOIP DSP 36 digitally combines the video signal in which the TP stream has been decoded and the video signal in which the video signals (H.263, H.264) have been decoded and outputs the combined data to the TV 39 in a PIP form. The audio signal that has been separated from the TP stream is sent to the TV 39 and the audio signals
decompressed from the audio signals (G.729, G.711) are sent to the telephone 28.
A user can use the user interface 29 and the telephone 28 while making a telephone call or answering a call. TV screen and pictures, or a variety of pieces of information, such as broadcasting signals and telephone information, can be displayed on the TV 39 at the same time.
Furthermore, for a telephone call, a signal input to the modem 34 through the
PSTN network is converted into PCM data through the modem 34. The PCM data are compressed into the audio signals (G.729, G.711) by the MOIP DSP 36. A variety of control signals and information signals, such as DTMF signals and ring-back tone CID, are detected from the audio signals and are then transmitted to the CPU 38. With these information, the CPU38 can make a telephone call and transmit compressed audio signals
(G.729, G.711) to another person, through the Ethernet 33 and the Internet network.
Conversely, a call received through the Internet network can be received by a general telephone or a mobile phone through the PSTN network.
A video call service through the network according to several embodiments of the
present invention will be described below with reference to FIG. 4.
If there is a request for call from a general telephone 45 or a mobile phone 40, the
MOIP set-top box 41 according to the present invention confirms a password or a given setting value and calls a MOIP set-top box 44 through an Internet network 42. If there is a
call for a telephone call from the MOIP set-top box 44 through the Internet network 42, the MOIP set-top box 41 connects the MOIP set-top box 44 to the general telephone 45 or the
mobile phone 40 through a PSTN network 43. Furthermore, if there is a request for call from the general telephone 45 or the mobile phone 40, the MOIP set-top box 41 confirms a password or a given setting value
and calls the MOIP set-top box 44 through the Internet network 42. If there is a call for a telephone call from the MOIP set-top box 44 through the Internet network 42, the MOIP set-top box 41 connects the MOIP set-top box 44 to a general call connected to a corresponding MOIP set-top box 41.
Furthermore, if there is a request for call from the general telephone, the MOIP set-top box 41 makes a telephone call to another MOIP set-top box 44 through the Internet network 42, and if there is a call for a telephone call from another MOIP set-top box 44 through the Internet network 42, the MOIP set-top box 41 connects another MOIP set-top box 44 to the general telephone 45 or the mobile phone 40 through the PSTN network 43.
At this time, if there is a call for a telephone call from another MOIP set-top box
44, the information is displayed on a TV as an OSD or PIP screen. Therefore, a user can know that there is a call while viewing the TV.
Furthermore, the MOIP set-top box 41 can transmit pictures, which are received
through an user interface, to another MOIP set-top box 44 and can output pictures, which are received from another MOIP set-top box 44, through the TV or the user interface. In particular, according to the present invention, a user can record pictures, which are received and transmitted while making a telephone call to a counterpart through the MOIP set-top box 41, in a memory unit or a recording device connected to the user interface.
In addition, if transmission mode for transmitting a TV program that is being
viewed to another MOIP set-top box 44 through a user interface is set up, the MOIP set-top box 41 calls another MOIP set-top box 44 through the Internet network 42 and transmits
the TV program that is being viewed to another MOIP set-top box 44. If a TV program is
received from another MOIP set-top box 44 through the Internet network 42, the MOIP set- top box 41 displays the TV program on a TV screen. Even in this case, in the same manner as a video call, the MOIP set-top box 41 can
record a TV program received from another MOIP set-top box 44 in the memory unit or
the recording device connected to the user interface.
[industrial Applicability]
Therefore, according to the present invention, a user can hold a video call with a counterpart while viewing a digital TV, can transmit a TV screen that is being viewed to a counterpart through a video telephone, and can make a phone call with a counterpart using
a general telephone or a general mobile phone through the MOIP set-top box of the present invention, which is connected to a network, anytime and anywhere at a low call charge.
While the invention has been described in connection with what is presently
considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover
various modifications and equivalent arrangements included within the spirit and scope of
the appended claims.

Claims

[CLAIMS] [Claim 1 ]
Video call service system using digital set-top box, which comprises a tuner for
receiving a broadcasting signal; a demodulator for converting an intermediate frequency (IF) signal filtered by the tuner into a digital baseband signal and then converting the
digital baseband signal into MPEG TS data; a MPEG decoder for decoding the MPEG TS data of the demodulator into a video signal and an audio signal; an user interface for receiving the input and image from a user and transferring the input and image to a CPU;
an Ethernet for performing a video call using an Internet network; a modem for using a PSTN network and a telephone; a MOIP DSP for decoding video signals (H.263, H.264) and audio signals (G.729, G.711) received through the Internet network and processing a
voice signal, a DTMF signal, and a ring-back tone received through the PSTN network;
and the CPU that combines RAW data in which the video signals (H.263, H.264) and the audio signals (G.729, G.711) are decoded, a voice signal, a DTMF signal, a ring-back tone, pieces of control data, and video and audio signals output from the MPEG decoder and converts the combined data into a signal that can be represented on a TV and a general telephone, and controls a memory unit for storing execution programs, font data,
protocols, and so on.
[Claim 2]
Video call service system using digital set-top box, which comprises a tuner for receiving a broadcasting signal; a demodulator for converting an intermediate frequency (IF) signal filtered by the tuner into a digital baseband signal and then converting the digital baseband signal into MPEG TS data; a MPEG decoder for decoding the MPEG TS data of the demodulator into a video signal and an audio signal; an user interface for
receiving the input and image from a user and transferring the input and image to a CPU;
an Ethernet for performing a video call using an Internet network; a modem for using a PSTN network and a telephone; a MOIP DSP for decoding video signals (H.263, H.264) and audio signals (G.729, G.711) received through the Internet network and processing a voice signal, a DTMF signal, and a ring-back tone received through the PSTN network; and the CPU that combines RAW data in which the video signals (H.263, H.264) and the
audio signals (G.729, G.711) are decoded, a voice signal, a DTMF signal, a ring-back tone, pieces of control data, and video and audio signals output from the MPEG decoder and converts the combined data into a signal that can be represented on a TV and a general
telephone, and controls a memory unit for storing execution programs, font data,
protocols, and so on,
wherein the CPU is constructed to control the driving of the MOIP DSP such that if there is a request for call from the general telephone or a mobile phone, the MOIP DSP confirms a password or a predetermined set value and makes a telephone call to another MOIP set-top
box through the Internet network, and if there is a call for a telephone call from another
MOIP set-top box through the Internet network, the MOIP DSP connects another MOIP set-top box to the general telephone or the mobile phone through the PSTN network.
[Claim 3]
Video call service system using digital set-top box, which comprises a tuner for receiving a broadcasting signal; a demodulator for converting an intermediate frequency
(IF) signal filtered by the tuner into a digital baseband signal and then converting the
digital baseband signal into MPEG TS data; a MPEG decoder for decoding the MPEG TS
data of the demodulator into a video signal and an audio signal; an user interface for receiving the input and image from a user and transferring the input and image to a CPU;
an Ethernet for performing a video call using an Internet network; a modem for using a PSTN network and a telephone; a MOIP DSP for decoding video signals (H.263, H.264) and audio signals (G.729, G.711) received through the Internet network and processing a
voice signal, a DTMF signal, and a ring-back tone received through the PSTN network; and the CPU that combines RAW data in which the video signals (H.263, H.264) and the audio signals (G.729, G.711) are decoded, a voice signal, a DTMF signal, a ring-back tone,
pieces of control data, and video and audio signals output from the MPEG decoder and converts the combined data into a signal that can be represented on a TV and a general telephone, and controls a memory unit for storing execution programs, font data,
protocols, and so on,
wherein the CPU is constructed to control the driving of the MOIP DSP such that
if there is a request for a call from the general telephone or a mobile phone, the MOIP DSP confirms a password or a predetermined set value and makes a telephone call to another
MOrP set-top box through the Internet network, and if there is a call for a telephone call
from another MOIP set-top box through the Internet network, the MOIP DSP connects another MOIP set-top box to a general telephone connected to a corresponding MOIP set- top box.
[Claim 4]
Video call service system using digital set-top box, which comprises a tuner for receiving a broadcasting signal; a demodulator for converting an intermediate frequency (IF) signal filtered by the tuner into a digital baseband signal and then converting the digital baseband signal into MPEG TS data; a MPEG decoder for decoding the MPEG TS data of the demodulator into a video signal and an audio signal; an user interface for receiving the input and image from a user and transferring the input and image to a CPU;
an Ethernet for performing a video call using an Internet network; a modem for using a PSTN network and a telephone; a MOIP DSP for decoding video signals (H.263, H.264)
and audio signals (G.729, G.711) received through the Internet network and processing a voice signal, a DTMF signal, and a ring-back tone received through the PSTN network; and the CPU that combines RAW data in which the video signals (H.263, H.264) and the audio signals (G.729, G.711) are decoded, a voice signal, a DTMF signal, a ring-back tone,
pieces of control data, and video and audio signals output from the MPEG decoder and converts the combined data into a signal that can be represented on a TV and a general telephone, and controls a memory unit for storing execution programs, font data, protocols, and so on,
wherein The CPU is constructed to control the driving of the MOIP DSP such that
if there is a request for call from the general telephone, the MOIP DSP makes a telephone call to another MOIP set-top box and if there is a call for a telephone call from another MOIP set-top box through the Internet network, the MOIP DSP connects another MOIP set-top box to the general telephone or a mobile phone through the PSTN network.
[Claim 5]
Video call service system using digital set-top box as claimed in one of claims 2 to 4, wherein the CPU controls the information to be displayed on a TV as an OSD or
PIP screen, if there is a call for a telephone call from another MOIP set-top box.
[Claim 6]
Video call service system using digital set-top box as claimed in one of claims 2 to 4, wherein the CPU transmits pictures, which are received through a user interface, to another MOTP set-top box and outputs pictures, which are received from another MOIP
set-top box, through a TV or the user interface.
[Claim 7] Video call service system using digital set-top box as claimed in claim 6, wherein the driving of the MOIP set-top box is controlled so that a user can record pictures, which are received and transmitted while making a telephone call to a counterpart
through the MOIP set-top box, in a memory unit or a recording device connected to an user
interface.
[Claim 8]
Video call service system using digital set-top box, which comprises a tuner for receiving a broadcasting signal; a demodulator for converting an intermediate frequency (IF) signal filtered by the tuner into a digital baseband signal and then converting the
digital baseband signal into MPEG TS data; a MPEG decoder for decoding the MPEG TS
data of the demodulator into a video signal and an audio signal; an user interface for
receiving the input and image from a user and transferring the input and image to a CPU; an Ethernet for performing a video call using an Internet network; a modem for using a PSTN network and a telephone; a MOIP DSP for decoding video signals (H.263, H.264) and audio signals (G.729, G.711) received through the Internet network and processing a voice signal, a DTMF signal, and a ring-back tone received through the PSTN network;
and the CPU that combines RAW data in which the video signals (H.263, H.264) and the audio signals (G.729, G.711) are decoded, a voice signal, a DTMF signal, a ring-back tone, pieces of control data, and video and audio signals output from the MPEG decoder and converts the combined data into a signal that can be represented on a TV and a general
telephone, and controls a memory unit for storing execution programs, font data, protocols, and so on,
wherein the CPU is constructed to control the driving of the MOIP DSP such that if transmission mode for transmitting a TV program that is being viewed to another MOIP set-top box through the user interface is set up, the MOIP DSP calls another MOIP set-top
box through the Internet network and transmits the TV program that is being viewed to another MOIP set-top box, if a TV program is received from another MOIP set-top box through the Internet network, the MOIP DSP displays the TV program on a TV screen.
[Claim 9]
Video call service system using digital set-top box as claimed in claim 8, wherein the CPU may be constructed to control the driving of the MOIP DSP such
that the MOIP DSP records a TV program received from another MOIP set-top box in a
memory unit or a recording device connected to the user interface.
PCT/KR2006/002363 2006-04-14 2006-06-20 Video call service system using a digital set-top box WO2007119901A1 (en)

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