KR100734399B1 - Method for transmitting and reproducing of digital broadcasting signal, digital broadcasting signal processing apparatus and video telephony apparatus therefor - Google Patents

Abstract

The present invention performs an IP network connection for performing a signal processing for accessing a packet network, a SIP-based network connection with a packet network connected through an IP network connection, and performs audio and video signal processing for a video telephone call. The SIP-based signal processor and the SIP-based signal processor establish a session with the digital broadcast processor on the packet network through a network connection, and receive the digital broadcast transmitted from the digital broadcast processor, thereby receiving the audio from the SIP-based signal processor. And a control unit for reproducing through video signal processing.

According to the present invention, not only a video telephone call through a video telephone apparatus which establishes a SIP-based session and performs a video telephone call function, but also receives a digital telephone which is reproduced by a digital broadcasting processing apparatus and transmitted in real time. Audio and video signal processing for calls allows playback in real time.

Video telephone, digital broadcasting, digital broadcasting processing device,

Description

TECHNICAL FOR TRANSMITTING AND REPRODUCING OF DIGITAL BROADCASTING SIGNAL, DIGITAL BROADCASTING SIGNAL PROCESSING APPARATUS AND VIDEO TELEPHONY APPARATUS THEREFOR}

1 is a block diagram of a video telephone apparatus and a digital broadcast processing apparatus according to an embodiment of the present invention.

FIG. 2 is a detailed block diagram of a SIP-based signal processor of the video telephone apparatus of FIG. 1; FIG.

FIG. 3 is a diagram for describing adjusting a frame rate in a transcoding unit included in the digital broadcast processing device of FIG. 1. FIG.

FIG. 4 is a diagram for describing adjusting a resolution in a transcoding unit included in the digital broadcast processing apparatus of FIG. 1. FIG.

FIG. 5 is a diagram for describing time shifting performed by a set top box included in the digital broadcast processing device of FIG. 1.

6 is a flowchart illustrating the overall operation of digital broadcast reproduction according to an embodiment of the present invention.

7 is a flowchart illustrating an operation of controlling a PVR function of digital broadcasting according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: video telephone apparatus 110: storage unit

120: control unit 121: session processing unit

122: reception processing unit 123: operation control unit

124: command setting unit 130: SIP-based signal processing unit

131: SIP processing unit 132: LAN interface unit

133: RTP processing unit 134: Video processing unit

135: audio processing unit 136: video input and output unit

137: audio input / output unit 138: data interface unit

139: system control user interface

140: IP network connection 200: digital broadcast processing device

210: storage 220: set-top box

230: control unit 231: session processing unit

232: transmission processing unit 233: operation control unit

240: transporting unit 250: SIP-based signal processing unit

260: IP network connection 300: packet network

The present invention relates to digital broadcast reproduction, and more particularly, to a digital broadcast transmission and reproduction method for receiving and reproducing a digital broadcast transmitted in real time by a device capable of reproducing a digital broadcast in a SIP-based video telephone apparatus. The present invention relates to a digital broadcast processing device and a video telephone device.

In addition to voice calls over the Internet, a video telephony uses a camera to capture a video of a caller and transmit the video to the other party, and the receiving side displays the video transmitted by the other party on the screen to watch the other party's appearance. It is a telephone device to perform. A communication protocol such as H.323 or SIP (Session Initialization Protocol (RFC 3261, RFC 2543)) is used in the video telephone apparatus to perform network connection and data transmission and reception between calls.

Meanwhile, according to the development of digital broadcasting technology, many apparatuses for receiving and reproducing digital broadcasting through satellite, terrestrial wave, and cable have been introduced. In order to reproduce digital broadcasting in the related art, a digital broadcasting receiver which receives digital broadcasting must be provided.

Meanwhile, although the conventional video telephone apparatus is provided with a function of performing audio and video signal processing for transmitting voice and video of a caller, the digital telephone receiver does not include a digital broadcast receiver for receiving digital broadcast. Can not play. In order to include the digital broadcasting receiver in the video telephone apparatus, there is a problem in that an additional cost is added.

An object of the present invention is to enable receiving and playing digital broadcasts in a SIP-based video telephone apparatus having a video telephone function.

According to an aspect of the present invention for achieving the technical problem, the IP network connection for performing the signal processing for the connection to the packet network, and performs the SIP-based network connection with the packet network connected through the IP network connection The SIP-based signal processor performs audio and video signal processing for a video telephone call, and establishes a session with a digital broadcast processor on a packet network through a network connection of the SIP-based signal processor, and transmits the data from the digital broadcast processor. It provides a video telephone apparatus comprising a control unit for receiving the digital broadcast to be reproduced through the audio and video signal processing of the SIP-based signal processor.

Preferably, the control unit is a session processing unit for setting up or releasing a session with the digital broadcasting processing apparatus using a SIP-based network connection of the SIP-based signal processing unit, and receiving the digital broadcasting from the digital broadcasting processing apparatus while the session is established by the session processing unit. And a reception control unit and an operation control unit for reproducing or ending the reproduction of the digital broadcast received through the reception processing unit through audio and video signal processing of the SIP-based signal processing unit.

Preferably, the reception processor receives the digital broadcast using a real time transmission protocol.

Preferably, the operation control unit issues a command to execute digital broadcast reproduction in accordance with a user's operation signal.

Preferably, the operation control unit issues each command using the DTMF signal.

Preferably, the video telephone apparatus may further include a command setting unit that performs setting for deleting, changing, and adding each command to be executed by the operation control unit by a user's operation.

Preferably, the command issued by the operation controller may include any one of a start, end, channel scan, channel change, image search, time shifting, recording, screen capture, and channel information view according to a user's operation signal.

Preferably, the video telephone apparatus may further include a storage unit for storing each command to be delivered by the operation control unit.

Preferably, the video telephone apparatus may further include a storage including one of an address of the digital broadcast processing apparatus, broadcast channel information, broadcast reproduction operation information, and codec information.

According to another aspect of the present invention, a method for receiving and playing digital broadcasting in a video telephone apparatus having a SIP-based network connection and a SIP-based signal processor for performing audio and video signal processing for a video telephone call, A session establishment step of establishing a session with a digital broadcast processing device that transmits digital broadcast using a SIP-based network connection of the SIP-based signal processor, and receiving digital broadcast from the digital broadcast processing device while the session is established by the session establishment step. And a reproduction step of reproducing the digital broadcast received through the reception processing step through audio and video signal processing of the SIP-based signal processor.

Preferably, the reception processing step receives a digital broadcast using a real time transmission protocol.

Preferably, the digital broadcast reproduction method of the video telephone apparatus may further include a codec information transmission step of transmitting the codec information used for the audio and video signal processing of the reproduction step to the digital broadcast processing apparatus.

Preferably, the digital broadcast reproduction method of the video telephone apparatus may further include an operation control step of controlling a reproduction operation of the digital broadcast by giving a command to execute the digital broadcast reproduction according to a user's operation signal.

Preferably, the operation control step issues each command using a DTMF signal.

Preferably, the digital broadcasting reproduction method of the video telephone apparatus may further include a command setting step of performing setting for deleting, changing, and adding each command to be executed by the operation control step by a user's operation.

Preferably, the command issued by the operation control step may include any one of start, end, channel scan, channel change, image search, time shifting, recording, screen capture, and channel information view according to a user's operation signal.

According to still another aspect of the present invention, there is provided a digital broadcasting processing apparatus for transmitting a digital broadcasting of a received digital broadcasting or a stored digital broadcasting to a video telephone apparatus, comprising: an IP network connection unit performing signal processing for accessing a packet network, and SIP-based signal processing unit which performs SIP-based network connection with a packet network connected through a network connection unit and performs signal processing of audio and video signals to be transmitted remotely, and plays a received digital broadcast or a stored digital broadcast on a video telephone apparatus. A transcoding unit for converting into a data format that can be converted to a SIP-based signal processor for remote transmission, and establishing a session according to a request of a video telephone apparatus on a packet network through a network connection of the SIP-based signal processor; Signal through audio and video signal processing of SIP-based signal processor A digital broadcast processing device including a control unit for transmitting a processed digital broadcast to a video telephone apparatus.

Preferably, the digital broadcast processing apparatus may further include a set-top box that receives the digital broadcast and outputs it to the transcoding unit.

Preferably, the digital broadcast processing apparatus may further include a storage unit storing digital broadcasts to be output to the transcoding unit for signal processing of the transcoding unit.

Preferably, the apparatus may further include a storage unit for storing the digital broadcast signaled by the transcoding unit for remote transmission.

Preferably, the control unit comprises a session processing unit for establishing or releasing a session with a video telephone apparatus using a SIP-based network connection of the SIP-based signal processing unit, and digital broadcasting signal-processed by the SIP-based signal processing unit while the session is established by the session processing unit. A transmission processing unit for transmitting the data to the video telephone apparatus via the IP connection unit, and an operation control unit for receiving a command for operation control transmitted from the video telephone apparatus and controlling the transmission operation of the digital broadcasting.

Preferably, the session processing unit automatically transmits a confirmation message for session establishment when the SIP invitation message transmitted from the video telephone apparatus is received to perform session establishment.

Preferably, the operation control unit receives each command by using the DTMF signal.

Preferably, the command received by the operation controller may include any one of a start, end, channel scan, channel change, image search, time shifting, recording, screen capture, and channel information view according to a user's operation signal.

Preferably, the SIP-based signal processing unit receives the codec information transmitted from the video telephone apparatus and performs audio and video signal processing using the corresponding codec.

Preferably, the SIP-based signal processor performs audio and video signal processing for a video telephone call.

Preferably, the transcoding unit adjusts the frame rate and the resolution so that the received digital broadcast or the stored digital broadcast can be reproduced in the video telephone apparatus.

According to still another aspect of the present invention, a session establishment step of establishing a SIP session with a video telephone apparatus using a SIP-based network connection, and a digital broadcast or stored digital broadcast received while the SIP session is established by the session establishment step A transmission processing step of processing a signal in a data format that can be reproduced by the telephone apparatus and transmitting the signal to a video telephone apparatus; and an operation control step of receiving a command for controlling the operation transmitted from the video telephone apparatus to control a digital broadcasting transmission operation. A digital broadcast transmission method of a digital broadcast processing apparatus is provided.

Preferably, the transmission processing step comprises a transcoding step of signal processing the received digital broadcast or stored digital broadcast into a data format that can be reproduced in a video telephone apparatus, and audio for remote transmission of the digital broadcast signal processed by the transcoding step. And a signal processing step of performing video signal processing, and a transmission step of transmitting the digital broadcast signal-processed by the signal processing step to the video telephone apparatus.

Preferably, the transcoding step adjusts the frame rate and the resolution so that the received digital broadcast or the stored digital broadcast can be reproduced in the video telephone apparatus.

Preferably, the transmitting step transmits the digital broadcast using a real time transmission protocol.

Preferably, the session establishment step performs session establishment by automatically transmitting a confirmation message for session establishment when a SIP invitation message sent from the video telephone apparatus is received.

Preferably, the command received in the operation control step may include any one of start, end, channel scan, channel change, image search, time shifting, recording, screen capture, and channel information view according to a user's operation signal.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 shows a video telephone apparatus and a digital broadcast processing apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the video telephone apparatus 100 and the digital broadcast processing apparatus 200 are connected to each other via the packet network 300.

The video telephone apparatus 100 performs a video telephone call function by performing SIP network connection and signal processing. To this end, the video telephone apparatus 100 performs audio and video signal processing for a video telephone call.

In addition, the video telephone apparatus 100 establishes a session with the digital broadcasting processing apparatus 200 through a SIP network connection, and receives audio and video signals that are reproduced and transmitted from the digital broadcasting processing apparatus 200 to process audio and video signals. Can play through.

The digital broadcast processing apparatus 200 receives a SIP invitation message sent from the video telephone apparatus 100, establishes a session with the video telephone apparatus 100 through a SIP network connection procedure, and requests from the video telephone apparatus 100. According to the present invention, the digital broadcasting received through satellite or terrestrial wave or cable is reproduced and transmitted to the video telephone apparatus 100 in real time.

To this end, the video telephone apparatus 100 includes a storage unit 110, a controller 120, a SIP-based signal processor 130, and a receiver for receiving and playing digital broadcasts reproduced from the digital broadcast processing apparatus 200 and transmitted in real time. It is configured to include an IP network connection unit 140.

The storage unit 110 may include an address of a corresponding digital broadcasting processing apparatus necessary for connecting to a SIP network with the digital broadcasting processing apparatus 200, broadcast channel information transmitted from the digital broadcasting processing apparatus, and various types of data being reproduced by the video telephone apparatus 100. It stores broadcasting reproduction operation information and codec information used to reproduce digital broadcasting.

The controller 120 establishes a session with the digital broadcast processing device 200 on the packet network 300 through the SIP network connection of the SIP-based signal processor 130, and transmits the digital data transmitted from the digital broadcast processing device 200. The broadcast is received and reproduced through audio and video signal processing of the SIP-based signal processor 130.

To this end, the control unit 120 includes a session processing unit 121, a reception processing unit 122, an operation control unit 123, and a command setting unit 124.

The session processor 121 establishes or releases a session with the digital broadcast processing device 200 by using the SIP-based network connection of the SIP-based signal processor 130. The session processor 121 transmits an invitation message (INVITE) to the digital broadcast transmission device 200 when requesting to set up a session through the SIP network connection function of the SIP-based signal processor 130, and requests the release of the session. The release request message BYE is transmitted to the digital broadcast transmission device 200.

The reception processor 122 receives the digital broadcast from the digital broadcast processing apparatus 200 in a state where the session is set by the session processor 131. At this time, the reception processor 122 receives a digital broadcast using a real transport protocol.

To this end, the reception processing unit 122 sets an RTP path with the digital broadcast transmission apparatus 200 through a Real-time Transport Protocol (RTP) path setting function of the SIP-based signal processing unit 130 and digital broadcasting through the set RTP path. A digital broadcast reproduced in real time by the transmission device 200 is received by streaming.

The operation controller 123 reproduces or terminates the digital broadcast received through the reception processor 123 through audio and video signal processing of the SIP-based signal processor 130. The operation controller 123 reproduces the digital broadcast received from the digital broadcast transmission apparatus 200 using a codec provided for audio and video signal processing through the audio and video signal processing function of the SIP-based signal processor 130. .

In addition, the operation control unit 123 issues a command to be executed for digital broadcast reproduction according to a user's operation signal.

At this time, the operation control unit 123 delivers each command using a dual tone multi-frequency (DTMF) signal.

The command issued by the operation controller 123 may include any one of a start, end, channel scan, channel change, image search, time shifting, recording, screen capture, and channel information view according to a user's operation signal. .

The command setting unit 124 deletes, changes, and adds each command to be delivered by the operation control unit 123 by a user's operation, and stores the command in the storage unit 110.

The SIP-based signal processor 130 performs SIP-based network connection with the packet network 300 connected through the IP network access unit 140 and performs audio and video signal processing for a video telephone call.

The IP network access unit 140 performs signal processing for access to the packet network 300. The IP network access unit 140 performs wireless signal processing or wired signal processing to access the packet network 300.

On the other hand, the digital transmission device is a storage unit 210, the set-top box 220, the control unit 230, the transcoding unit 240, in order to reproduce the digital broadcast and transmit it to the video telephone apparatus 100 in real time, The SIP signal processing unit 250 and the IP network connection unit 260 are included.

The storage unit 210 may store various digital broadcasts received through the set top box 220.

In addition, the storage unit 210 stores an address of the video telephone apparatus 100 to which digital broadcasting is to be transmitted, and stores instructions for controlling reproduction and transmission of digital broadcasting transmitted to the video telephone apparatus 100.

These commands stored in the storage unit 210 may be defined using the DTMF signal promised with the video telephone apparatus 100.

The set top box 220 receives and plays digital broadcasts through satellite, terrestrial or cable. In addition, the set-top box 220 may play the digital broadcast stored in the storage 210. In addition, the set-top box 220 performs a personal video recorder (PVR) function of digital broadcasting. PVR functions include recording, capturing, time-shifted interval repetition, rewinding, and fast forward (FF) execution.

Here, digital broadcasting refers to various digital multimedia data consisting of video and / or audio, and such digital broadcasting includes receiving via wired cable as well as satellite or terrestrial radio.

In addition, digital broadcasting services include wireless digital broadcasting services via satellite or terrestrial waves performed using a portable or fixed terminal such as a small TV or PDA (Personal Digital Assistants).

Such wireless digital broadcasting services include satellite digital multimedia broadcasting (hereinafter referred to as "satellite DMB") services and terrestrial digital multimedia broadcasting (hereinafter referred to as "terrestrial DMB") services.

Satellite DMB is a digital broadcasting service that uses the frequency transmitted by satellite Hanbyeol, the world's first digital broadcasting satellite, and terrestrial DMB is broadcasting by using a frequency transmitted from a terrestrial transmission station like the current broadcast or radio. .

Since satellite DMB receives high-bandwidth frequencies through satellites, there is no parallax of information, so the same digital broadcasting data can be provided in all regions of the country.However, in the case of terrestrial digital broadcasting, digital broadcasting data transmitted by each transmitting station When receiving by region, the time difference occurs and information is distorted. Therefore, digital broadcasting data is provided by using different frequencies in each region such as TV.

Accordingly, the set-top box 220 includes a digital broadcast receiver (not shown) for receiving digital broadcast data and image data to be reproduced by processing digital broadcast data received by the digital broadcast receiver to reproduce digital broadcast data. And a digital broadcast control unit (not shown) for providing voice data.

The controller 230 establishes a session in response to a request of the video telephone apparatus 100 on the packet network 300 through a network connection of the SIP-based signal processor 250, and establishes a session of the audio of the SIP-based signal processor 250. The digital broadcast signal-processed through the video signal processing is transmitted to the video telephone apparatus 100.

To this end, the controller 230 includes a session processor 231, a transmission processor 232, and an operation controller 233.

The session processor 231 establishes or releases a session with the video telephone apparatus 100 by using the SIP-based network connection of the SIP-based signal processor 250.

The session processing unit 231 performs a session setup by automatically transmitting a confirmation message for establishing a session when the SIP invitation message transmitted from the video telephone apparatus 100 is received.

The transmission processing unit 232 transmits the digital broadcast signal processed by the SIP-based signal processing unit 250 to the video telephone apparatus 100 through the IP connection unit 260 while the session is established by the session processing unit 231.

The operation control unit 233 receives a command for operation control transmitted from the video telephone apparatus 100 and controls the transmission operation of the digital broadcast.

The operation control unit 233 receives each command using a DTMF signal. The command received by the operation controller 233 may include any one of a start, end, channel scan, channel change, image search, time shifting, recording, screen capture, and channel information view according to a user's operation signal.

The transcoding unit 240 converts the received digital broadcast or stored digital broadcast into a data format that can be reproduced by the video telephone apparatus 100, and outputs the converted digital broadcast to the SIP-based signal processor 250 for remote transmission.

The SIP-based signal processor 250 performs SIP-based network connection with the packet network 300 connected through the IP network access unit 260 and performs signal processing of audio and video signals to be transmitted remotely.

As the SIP-based signal processor 250 performs a configuration and operation corresponding to the SIP-based signal processor 130 of the video telephone apparatus 100, the SIP-based signal processor 130 of the video telephone apparatus 100 is shown in FIG. It will be described in more detail, and a separate description will be omitted here.

The IP network connection unit 260 performs signal processing for connecting to the video telephone apparatus 100 via the packet network 300.

FIG. 2 is a detailed block diagram illustrating a SIP-based signal processor of the video telephone apparatus of FIG. 1.

Referring to FIG. 2, the SIP-based signal processor 130 includes a SIP processor 131, a LAN interface unit 132, an RTP processor 133, a video processor 134, an audio processor 135, A video input / output unit 136, an audio input / output unit 137, a data interface unit 138, and a system control user interface unit 139 are configured.

The SIP processing unit 131 performs a function of establishing and releasing a session through a SIP network connection. To this end, the SIP processing unit 131 has a SIP stack, and may optionally include a resource-reservation protocol (RSVP), a real-time control protocol (RTCP), and a security stack.

The LAN interface unit 132 performs LAN signal processing for accessing the packet network 300 in association with the IP network connection unit 140. Accordingly, the LAN interface unit 132 may use a wireless LAN or a wired LAN.

The real-time transport protocol (RTP) processing unit 133 receives a digital broadcast reproduced by the set-top box 220 of the digital broadcast processing apparatus 200 as a stream and reproduces the real-time transmission path in order to reproduce the image in the video telephone apparatus 100. It is necessary to set. The RTP processing unit 133 performs a function of setting a real time transmission path with the digital broadcast processing device 200.

The video processor 134 performs video signal processing for a video telephone call, and performs video signal processing during digital broadcasting received from the digital broadcast processing apparatus 200. The video processor 134 performs video signal processing using video codecs such as H.261, H.263, H.263 +, and MobiVid.

The audio processor 135 performs audio signal processing for a video telephone call and also performs audio signal processing during digital broadcasting received from the digital broadcast processing apparatus 200. The audio processor 135 performs audio signal processing by using audio codecs such as G.711, G722, G.728, G.729, and EFR.

The video input / output unit 136 corresponds to a camera for receiving a video signal to be processed by the video processing unit 134 or a display for outputting the video signal processed by the video processing unit 134 to a screen.

The audio input / output unit 137 corresponds to a microphone for receiving an audio signal to be processed by the audio processor 135 or a speaker for outputting an audio signal processed by the audio processor 135.

The data interface unit 138 performs signal processing for processing data such as subtitle information and outputting it to a screen during video telephone call or digital broadcast reproduction.

The system control user interface unit 139 is an interface unit for receiving system control information for network connection through the SIP processing unit 131.

FIG. 3 is a diagram for describing adjusting a frame rate in a transcoding unit included in the digital broadcast processing apparatus of FIG. 1.

Referring to FIG. 3, the digital broadcast reproduced by the set-top box 220 of the digital broadcast transmission device 200 uses 30 frames. On the contrary, in order to be reproduced in the video telephone apparatus 100, the frame rate must be lowered to 15 frames.

Therefore, the transcoding unit 240 lowers the frame rate by, for example, removing even-numbered frames.

FIG. 4 is a diagram for describing adjusting a resolution in a transcoding unit included in the digital broadcast processing apparatus of FIG. 1.

Referring to FIG. 4, the screen played on the set-top box 220 of the digital broadcasting processing apparatus 200 uses an HD resolution (1920 × 1152), but the QCIF resolution (176 × 144).

To this end, the transcoding unit 240 may be lowered to a desired resolution by removing horizontal even lines, for example, and removing vertical even lines.

FIG. 5 is a diagram for describing time shifting performed by a set-top box included in the digital broadcast processing apparatus of FIG. 1.

The time shift function is used to search for or check a previous image in real time during the playback of the current digital broadcast (FF, rewind, section repeat). The time shift function does not play a broadcast file that has already been recorded. If the search returns to the current broadcast point in FF, the current broadcast stream is played.

6 is a flowchart illustrating the overall operation of digital broadcast reproduction according to an embodiment of the present invention.

Referring to FIG. 6, the session processing unit 121 of the video telephone apparatus 100 receives a SIP invitation message (INVITE) for setting up a call to the digital broadcasting processing apparatus 200 through a network connection function of the SIP-based signal processing unit 130. Send (S1).

A general digital broadcast can be played by decoding a broadcast stream through MPEG. The video telephone apparatus 100 transmits an invitation message to the digital broadcast transmission apparatus 200 through a SIP network connection function of the SIP signal processor 130 to make a call. The request establishes a session with the digital broadcast processing device 200 having the SIP response function.

At this time, the session processing unit 121 of the video telephone apparatus 100 is a = recvony, which is a media characteristic of receiving the user's voice or video without transmitting the video telephone apparatus 100 to the digital broadcasting processing apparatus 200 side. Set and send.

The session processing unit 231 of the digital broadcast transmission apparatus 200 that receives the invitation message for session establishment from the video telephone apparatus 100 performs automatic session establishment through the SIP network connection function of the SIP-based signal processing unit 250. (S2). Here, auto session setup means that when an invitation message comes from the other party, the user is notified that an invitation message has been received, and the user is not prompted to send a response message for the invitation message. It means to automatically send a response message.

The session processor 231 of the digital broadcast transmission device 200 transmits a response message 200 OK to the video telephone device 100 through the automatic session setup function of the SIP-based signal processor 250 (S3).

At this time, the session processing unit 231 of the digital broadcast transmission device 200 receives a voice or a video from the video telephone device 100 without receiving a voice or a video from the video telephone device 100 when transmitting a response message to the video telephone device 100. Set a = sendonly, a media feature that only sends video.

When a SIP session is established between the video telephone apparatus 100 and the digital broadcast transmission apparatus 200, the reception processing unit 122 of the video telephone apparatus 100 receives the digital broadcast transmitted from the digital broadcast transmission apparatus 200 in real time. To set the RTP path with the digital broadcast transmission device 200 through the RTP setting function of the SIP-based signal processor 130.

Similarly, the transmission processing unit 232 of the digital broadcast transmission device 200 uses the RTP setting function of the SIP signal processing unit 250 to transmit the digital broadcast to the video telephone device 100 in real time. Set the path (S4).

After the RTP path is established between the video telephone device 100 and the digital broadcast transmission device 200, the transmission processing unit 232 of the digital transmission device 200 transmits the digital broadcast channel and program information through the set RTP path (S5). ). Examples of broadcast channels and programs include ch1.SBS: ambitious only, ch2.KBS: imaginary plus, ch3.MBC: PD notebook, and the like.

When the digital broadcasting channel and the program information are received from the digital broadcasting transmission apparatus 200, the operation control unit 123 of the video telephone apparatus 100 transmits the channel number selected by the user in the form of DTMF to request reproduction of the corresponding channel. (S6).

The digital broadcast transmission device 200 which receives the channel number from the video telephone apparatus 100 plays the digital broadcast of the corresponding channel in the set top box 220, and the transcoding unit 240 plays back the set top box 220. A procedure of transcoding the digital broadcast into a data format that can be reproduced by the video telephone apparatus 100 is performed (S7).

After transcoding of the digital broadcast to be transmitted by the transcoding unit 240 is performed, the transmission processing unit 232 transmits the audio of the SIP signal processing unit 250 so that the video telephone apparatus 100 can reproduce the transcoded digital broadcast. It transmits to the video telephone apparatus 100 through video signal processing (S8).

On the other hand, the session processing unit 121 of the video telephone apparatus 100 transmits a session release request message (BYE) to the digital broadcasting processing device 200 when it is desired to end the reproduction of the digital broadcasting (S9).

When the session release request message is received from the video telephone apparatus 100, the session processing unit 231 of the digital broadcasting processing apparatus 200 transmits a response message 200 OK to the video telephone apparatus 100 and ends the session (S10). .

7 is a flowchart illustrating an operation of controlling a PVR (Personal Video Recorder) function of digital broadcasting according to an embodiment of the present invention.

Referring to FIG. 7, the session processing unit 121 of the video telephone apparatus 100 sends a SIP invitation message (INVITE) for call setup to the digital broadcasting processing apparatus 200 through a network connection function of the SIP-based signal processing unit 130. Send (S11).

The session processing unit 231 of the digital broadcast transmission apparatus 200 that receives the invitation message for session establishment from the video telephone apparatus 100 performs automatic session establishment through the SIP network connection function of the SIP-based signal processing unit 250. (S12).

The session processor 231 of the digital broadcast transmission device 200 transmits a response message 200 OK to the video telephone apparatus 100 through the automatic session setup function of the SIP-based signal processor 250 (S13).

When a SIP session is established between the video telephone apparatus 100 and the digital broadcast transmission apparatus 200, the reception processing unit 122 of the video telephone apparatus 100 and the transmission processing unit 232 of the digital broadcasting transmission apparatus 200 perform a digital broadcast. In order to transmit in real time, an RTP path is set (S14).

After the RTP path is established between the video telephone device 100 and the digital broadcast transmission device 200, the transmission processor 232 of the digital transmission device 200 transmits the digital broadcast channel and program information through the set RTP path (S15). ).

When the digital broadcasting channel and the program information are received from the digital broadcasting transmission apparatus 200, the operation control unit 123 of the video telephone apparatus 100 transmits the channel number selected by the user in the form of DTMF to request reproduction of the corresponding channel. (S16).

Accordingly, the digital broadcast transmission device 200 reproduces the digital broadcast of the corresponding channel in the set-top box 220, transcodes the reproduced digital broadcast in the transcoding unit 240 (S7), and transcodes the digital broadcast. Is transmitted to the video telephone apparatus 100 through the audio and video signal processing of the SIP signal processing unit 250 (S18).

The operation controller 123 of the video telephone apparatus 100 transmits the DTMF of the interval repeat command to the digital broadcast processing apparatus 200 among the PVR functions built into the set top box 220 (S19).

The operation control unit 123 of the video telephone apparatus 100 transmits a DTMF of a recording command to the digital broadcasting processing apparatus 200 when a recording function is to be performed among the PVR functions built in the set top box 220 (S19).

Accordingly, the operation controller 233 of the digital transmission apparatus 200 controls the set top box 220 to record and store the digital broadcast of the channel currently being reproduced in the storage 210 (S20).

On the other hand, the operation control unit 123 of the video telephone apparatus 100, if you want to perform the capture function of the screen currently being reproduced among the PVR functions built in the set-top box 220, the DTMF of the capture command (the digital broadcast processing device ( 200) (S21).

Accordingly, the operation control unit 233 of the digital transmission device 200 controls the set top box 220 to capture the digital broadcast of the channel currently being reproduced as a still screen and store it in the storage unit 210 (S22).

In addition, the operation controller 123 of the video telephone apparatus 100 may command the interval repetition function by performing time shifting on a digital broadcast of a channel currently reproduced among the PVR functions included in the set-top box 220. To this end, the operation control unit 123 transmits a DTMF corresponding to the interval repetition command to the digital broadcast processing device 200 (S23).

Accordingly, the operation control unit 233 of the digital transmission device 200 controls the set top box 220 to perform a section repetition at the time point requested for the digital broadcasting of the channel currently being reproduced, and transmit the same to the video telephone apparatus 100. (S24).

In addition, the operation control unit 123 of the video telephone apparatus 100 may command the FF function by performing time shifting on a digital broadcast of a channel currently reproduced among the PVR functions embedded in the set-top box 220. To this end, the operation control unit 123 transmits a DTMF corresponding to the FF command to the digital broadcast processing device 200 (S25).

Accordingly, the operation control unit 233 of the digital transmission device 200 controls the set top box 220 to execute the FF command at the time of request for digital broadcasting of the channel currently being reproduced, and transmit the FF command to the video telephone device 100. (S26).

In addition, the operation controller 123 of the video telephone apparatus 100 may command the reverse playback function by performing time shifting on the digital broadcast of the channel currently reproduced among the PVR functions embedded in the set-top box 220. To this end, the operation control unit 123 transmits the DTMF corresponding to the reverse playback command to the digital broadcast processing device 200 (S27).

Accordingly, the operation control unit 233 of the digital transmission apparatus 200 controls the set top box 220 to execute a reverse playback command at the time when a request is made for the digital broadcasting of the channel currently being reproduced, and transmits it to the video telephone apparatus 100. (S28).

The session processor 121 of the video telephone apparatus 100 transmits a session release request message (BYE) to the digital broadcast processing device 200 when it is desired to terminate the reproduction of the digital broadcast (S29).

When the session release request message is received from the video telephone apparatus 100, the session processing unit 231 of the digital broadcasting processing apparatus 200 transmits a response message 200 OK to the video telephone apparatus 100 and ends the session (S30). .

According to the present invention, not only a video telephone call through a video telephone apparatus for establishing a SIP-based session, but also a digital broadcast reproduced and transmitted in real time by a digital broadcasting processing apparatus in a video telephone apparatus, It can receive and play back in real time by audio and video signal processing for video phone calls.

Accordingly, even if an expensive antenna for receiving digital broadcasting is not provided, the digital broadcasting can be reproduced by any video telephone apparatus having a video telephone call function through the SIP session setup.

Claims (33)

An IP network connection unit performing signal processing for access to a packet network; A SIP-based signal processor which performs a SIP-based network connection with a packet network connected through the IP network connection unit and performs audio and video signal processing for a video telephone call; A session processor configured to establish or release a session with the digital broadcast processor by using a SIP-based network connection of the SIP-based signal processor; A reception processing unit which receives digital broadcasting from the digital broadcasting processing apparatus while a session is set by the session processing unit; And an operation control unit for reproducing or ending the reproduction of the digital broadcast received through the reception processing unit through audio and video signal processing of the SIP-based signal processing unit. delete Claim 3 was abandoned when the setup registration fee was paid. The method according to claim 1, wherein the receiving processing unit, A video telephone apparatus for receiving the digital broadcast using a real time transmission protocol. Claim 4 was abandoned when the registration fee was paid. The method of claim 1, wherein the operation control unit, A video telephone apparatus that issues a command to execute digital broadcast reproduction in accordance with a user's operation signal. Claim 5 was abandoned upon payment of a set-up fee. The method of claim 4, wherein the operation control unit, A video telephone apparatus that issues each command using a DTMF signal. Claim 6 was abandoned when the registration fee was paid. The video telephone apparatus of claim 4, And a command setting unit for setting to delete, change, or add each command to be delivered by the operation control unit by a user's operation. Claim 7 was abandoned upon payment of a set-up fee. The method of claim 4, wherein the command issued by the operation controller is A video telephone apparatus including any one of a start, end, channel scan, channel change, image search, time shifting, recording, screen capture, and channel information view according to a user's operation signal. Claim 8 was abandoned when the registration fee was paid. The video telephone apparatus of claim 4, And a storage unit for storing each command to be delivered by the operation control unit. Claim 9 was abandoned upon payment of a set-up fee. The video telephone apparatus of claim 1, And a storage unit including one of an address of the digital broadcast processing device, broadcast channel information, broadcast reproduction operation information, and codec information. A method of receiving and playing digital broadcasts in a video telephone apparatus having a SIP-based network connection and a SIP-based signal processor for performing audio and video signal processing for a video telephone call, A session establishment step of establishing a session with a digital broadcast processing device for transmitting digital broadcasts using a SIP-based network connection of the SIP-based signal processor; A reception processing step of receiving a digital broadcast from the digital broadcast processing apparatus while a session is established by the session establishment step; A reproduction step of reproducing the digital broadcast received through the reception processing step through audio and video signal processing of the SIP-based signal processor; And an operation control step of controlling a reproduction operation of the digital broadcast by giving a command to execute digital broadcast reproduction according to a user's operation signal. Claim 11 was abandoned upon payment of a setup registration fee. The method according to claim 10, wherein the receiving processing step, A digital broadcast reproduction method of a video telephone apparatus for receiving the digital broadcast using a real time transmission protocol. Claim 12 was abandoned upon payment of a registration fee. The method according to claim 10, And a codec information transmitting step of transmitting codec information used in the audio and video signal processing of the reproduction step to the digital broadcasting processing device. delete Claim 14 was abandoned when the registration fee was paid. The method of claim 10, wherein the operation control step, A digital broadcast reproduction method of a video telephone apparatus that issues each command using a DTMF signal. Claim 15 was abandoned upon payment of a registration fee. The method according to claim 10, And a command setting step of performing setting for deleting, changing, and adding each command to be delivered by said operation control step by a user's operation. Claim 16 was abandoned upon payment of a setup registration fee. The method of claim 10, wherein the command issued by the operation control step, A digital broadcasting reproduction method of a video telephone apparatus including any one of a start, end, channel scan, channel change, image search, time shifting, recording, screen capture, and channel information display according to a user's operation signal. A digital broadcasting processing apparatus for transmitting digital broadcasting received or stored digital broadcasting to a video telephone apparatus. An IP network connection unit performing signal processing for access to a packet network; A SIP-based signal processor which performs a SIP-based network connection with a packet network connected through the IP network connection unit and performs signal processing of audio and video signals to be transmitted remotely; A transcoding unit converting the received digital broadcast or stored digital broadcast into a data format that can be reproduced by the video telephone apparatus and outputting the digital broadcast to the SIP-based signal processor for remote transmission; A session processing unit for establishing or releasing a session with the video telephone apparatus using a SIP-based network connection of the SIP-based signal processing unit; A transmission processing unit for transmitting the digital broadcast signaled by the SIP-based signal processing unit to the video telephone apparatus through the IP connection unit while the session is established by the session processing unit; And an operation control unit which receives a command for operation control transmitted from the video telephone apparatus and controls a transmission operation of digital broadcasting. Claim 18 was abandoned upon payment of a set-up fee. The method according to claim 17, And a set-top box which receives the digital broadcast and outputs it to the transcoding unit. Claim 19 was abandoned upon payment of a registration fee. The method according to claim 17, And a storage unit which stores digital broadcasts to be output to the transcoding unit for signal processing of the transcoding unit. Claim 20 was abandoned upon payment of a registration fee. The method according to claim 17, And a storage unit for storing the digital broadcast signal processed by the transcoding unit for remote transmission. delete Claim 22 was abandoned upon payment of a registration fee. The method of claim 17, wherein the session processing unit, And when the SIP invitation message transmitted from the video telephone apparatus is received, automatically transmitting a confirmation message for establishing a session to perform session establishment. Claim 23 was abandoned upon payment of a set-up fee. The method of claim 17, wherein the operation control unit, And a digital broadcast processing device for receiving the respective commands using a DTMF signal. Claim 24 was abandoned when the setup registration fee was paid. The method of claim 17, wherein the command received by the operation control unit, A digital broadcast processing device including any one of a start, end, channel scan, channel change, image search, time shifting, recording, screen capture, and channel information view according to a user's operation signal. Claim 25 was abandoned upon payment of a registration fee. The method of claim 17, wherein the SIP-based signal processing unit And a codec information transmitted from the video telephone apparatus to perform audio and video signal processing using the corresponding codec. Claim 26 was abandoned upon payment of a registration fee. The method of claim 17, wherein the SIP-based signal processing unit Digital broadcast processing device that performs audio and video signal processing for video telephone calls. Claim 27 was abandoned upon payment of a registration fee. The method of claim 17, wherein the transcoding unit, And a frame rate and a resolution so as to reproduce the received digital broadcast or the stored digital broadcast in the video telephone apparatus. A session establishment step of establishing a SIP session with a video telephone apparatus using a SIP-based network connection; A transmission processing step of signal-processing the digital broadcast or the stored digital broadcast received in the state in which the SIP session is established by the session establishment step in a data format that can be reproduced in the video telephone apparatus, and transmitting the signal to the video telephone apparatus; And an operation control step of controlling a transmission operation of digital broadcasting by receiving a command for operation control transmitted from the video telephone apparatus. Claim 29 was abandoned upon payment of a set-up fee. 29. The method of claim 28, wherein the transfer processing step is Transcoding the received digital broadcast or stored digital broadcast into a data format that can be reproduced in the video telephone apparatus; A signal processing step of performing audio and video signal processing to remotely transmit the digital broadcast signal processed by the transcoding step; And a transmitting step of transmitting the digital broadcast signal processed by the signal processing step to the video telephone apparatus. Claim 30 was abandoned upon payment of a registration fee. The method of claim 29, wherein the transcoding step, A digital broadcast transmission method of a digital broadcast processing apparatus which adjusts a frame rate and resolution so that a received digital broadcast or a stored digital broadcast can be reproduced by the video telephone apparatus. Claim 31 was abandoned upon payment of a registration fee. Claim 32 was abandoned upon payment of a registration fee. The method of claim 28, wherein the session establishment step, And when the SIP invitation message transmitted from the video telephone apparatus is received, automatically transmitting a confirmation message for setting up a session to perform session setup. Claim 33 was abandoned upon payment of a registration fee. The method of claim 28, wherein the command received in the operation control step, A digital broadcast transmission method of a digital broadcast processing device including any one of a start, end, channel scan, channel change, image search, time shifting, recording, screen capture, and channel information view according to a user's operation signal.

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