KR20120082270A - Open audio service system in digital broadcast and method thereof - Google Patents

Abstract

PURPOSE: An open type voice service system is provided to offer various voice services for images by interlocking a broadcast service provided from a digital broadcast center with the voice services. CONSTITUTION: A PTS(Presentation Time Stamp) synchronization unit(130) synchronizes voice information with video information in a PTS. A broadcast information de-multiplexing unit(330) extracts the video information from a digital broadcast stream. An audio information reception unit(340) receives a transport stream of the voice information from an audio service server(100). A broadcast control unit(332) synchronizes a video decoding unit(380) with an audio decoding unit(390) by using the PTS of the video information and the voice information.

Description

Open voice service system and service method in digital broadcasting {OPEN AUDIO SERVICE SYSTEM IN DIGITAL BROADCAST AND METHOD THEREOF}

The present invention relates to an open voice service system and a service method. More particularly, the present invention relates to an open voice service system and a service method in digital broadcasting to provide various voice services by interlocking an open voice service to a broadcast provided in digital broadcasting.

Current digital broadcasts receive broadcasts made by broadcasting stations directly to a TV or set-top box, select a channel that viewers want to watch, and video and audio information of an MPEG Transport Stream in the channel. Is decoded and watched on TV. At this time, audio information corresponding to the image of each channel is matched one by one except for multilingual audio broadcasting.

On the other hand, in the case of sports channels, the video screen is also important, but the viewer ratings vary greatly depending on the announcer, caster's voice, and style.

In addition, when the same game is simultaneously carried out in several broadcasts, the viewer first recognizes who the announcer is and who the caster is, and then watches the broadcast channel of the preferred announcer or caster.

In particular, in the case of exclusive broadcasting over the air or terrestrial waves, all viewers have to listen to the same announcer or caster's voice commentary.

In other words, due to the structure of providing a single voice service (audio information) to a single broadcast video (video information), the broadcaster who manages such a broadcast does not show the viewer rating as expected in a special case of exclusive broadcasting. do.

An object of the embodiment of the present invention for improving the above-mentioned problem is to provide a variety of voice services for the same video by providing an open voice service in conjunction with the broadcast provided by the digital broadcast station system and service method To provide.

Another object of the present invention for improving the above-mentioned problems is to extract the PTS of the video information of the broadcast provided by the digital broadcasting station in the voice service server and to synchronize the PTS of the open voice service and to provide the video regardless of the network environment. The present invention provides an open voice service system and a service method in digital broadcasting that enable voice synchronization.

An open voice service system in digital broadcasting according to an embodiment of the present invention for achieving the above object is an open voice service system in digital broadcasting including a digital broadcasting server for providing digital broadcasting, and the digital broadcast stream in the digital broadcasting server. A video information receiver for extracting video information from the received video signal; A TS generator for generating a transport stream of information, at least one voice service server including a transmitter for transmitting a transport stream of the voice information, and a broadcast information demultiplexer for receiving the digital broadcast stream and extracting image information; One of the voice service servers A voice information receiver for receiving a transport stream of the voice information, a video decoder for decoding and outputting the video information, a voice decoder for decoding and outputting the voice information, and a PTS of the video information and the voice information. And a set top box including a broadcast controller to control and synchronize the video decoder and the audio decoder.

The set-top box controls the synchronization error between the video information buffer unit buffering the video information, the audio information buffer unit buffering the audio information, the buffer of the video information buffer unit, and the buffer of the audio information buffer unit to a predetermined level or less. The broadcast control unit may further include a buffer control unit configured to maintain the preset level to be controllable.

The open voice service system in the digital broadcasting manages a voice server manager that manages a connection path and server related information of the voice service server and a broadcast schedule of the digital broadcast server and a voice service provision schedule of the voice service server corresponding thereto. It is preferable to further include a service management server including a broadcast information management unit to provide.

In accordance with another aspect of the present invention, an open voice service system in digital broadcasting is an open voice service system in digital broadcasting including a digital broadcasting server for providing digital broadcasting. A broadcast information demultiplexer for receiving a broadcast stream and extracting image information, a voice information receiver configured to receive a transport stream of the voice information from a voice service server providing a synchronized voice service for the digital broadcast stream, and the video information A video decoder to decode and output the audio information; a audio decoder to decode and output the audio information; and a broadcast controller to control and synchronize the video decoder and the audio decoder by using a PTS of the video information and the audio information. Set top box .

The open voice service system in the digital broadcasting further includes a service management server providing a connection path of the voice service server, and providing a broadcast schedule of the digital broadcast server and a voice service schedule of the voice service server corresponding thereto. The set top box further includes a service manager that can interface with the service management server.

The set-top box controls the synchronization error between the video information buffer unit buffering the video information, the audio information buffer unit buffering the audio information, the buffer of the video information buffer unit, and the buffer of the audio information buffer unit to a predetermined level or less. Preferably, the broadcast control unit further includes a buffer control unit which is maintained at a predetermined level so as to be controllable.

According to another aspect of the present invention, there is provided an open voice service method in digital broadcasting, including receiving a digital broadcast stream from a digital broadcast server and extracting image information from the digital broadcast server. Inputting voice information relating to the voice service server, synchronizing the PTS of the voice information with respect to the video information, the voice service server generating a transport stream of voice information synchronized with the PTS, Transmitting, by the voice service server, the transport stream of the voice information, by the set-top box receiving the digital broadcast stream, extracting image information, and by the set-top box, transporting the voice information from one of the voice service servers. Receiving a stream, the set-top box the image And synchronizing the information with the PTS of the audio information, and decoding and outputting the video information and the audio information by the set-top box.

According to another aspect of the present invention, there is provided an open voice service method in digital broadcasting, in which a set-top box receives a digital broadcasting stream from the digital broadcasting server and extracts image information. Receiving a transport stream of the voice information from a voice service server providing a synchronized voice service for a digital broadcast stream; controlling and synchronizing the set-top box by controlling the PTS of the video information and the voice information; A box decoding and outputting the video information and the audio information, the set-top box buffering the video information, the set-top box buffering the audio information, and the set-top box and a buffer of the video information. The synchronization error of the buffer of the voice information is below a certain level And a step of maintaining a predetermined level by controlling to controllably.

According to an embodiment of the present invention, an open voice service system and a service method in digital broadcasting provide an open voice service in conjunction with a broadcast provided by a digital broadcasting station to provide various voice services for the same video, thereby doubling the enjoyment of viewing. It is effective to let.

The open voice service system and service method in digital broadcasting according to an embodiment of the present invention extract a PTS of video information of a broadcast provided by a digital broadcasting station from a voice service server and synchronize the PTS of the open voice service to provide a network environment. Regardless of the recording, it is possible to service video and audio regardless of the recording.

1 is a block diagram of an open voice service system in digital broadcasting according to an embodiment of the present invention.
2 is a block diagram of a voice service server according to an embodiment of the present invention.
3 is a block diagram of a service management server according to an embodiment of the present invention.
4 is a block diagram of a set-top box according to an embodiment of the present invention.
5 is a flowchart illustrating a voice service providing method according to an embodiment of the present invention.
6 is a flowchart illustrating a voice service receiving method according to an embodiment of the present invention.

The present invention as described above will be described in detail with reference to the accompanying drawings and embodiments.

1 is a block diagram of an open voice service system for digital broadcasting according to an embodiment of the present invention, wherein the open voice service system includes a voice service server 100 for a broadcast being viewed by a viewer through the digital broadcast server 500. By using 600, 700, the desired audio is synchronized with the broadcast video so that the viewer can receive various open audio services.

The personal broadcaster (AJ, audio jockey) 102 who wants to transmit the open voice service must first subscribe to and authenticate the service with the open voice management server 100. The private broadcaster 102 whose subscription is authenticated is transmitted live or after registering with the service management server 200 to send his voice to the broadcast, the voice can be transmitted through the voice service server 100. Will be.

The viewer accesses the service management server 200 in order to receive the personal voice broadcast on the broadcast currently viewed, brings up the broadcast list of the broadcast being watched, selects the broadcast of the audio jockey 102 desired by the user, and is open to the broadcast being watched. Receive voice service.

At this time, the network situation is different for each viewer, the most important factor is to solve the problem of synchronization between the video and the voice of the open voice service in the broadcast.

According to an embodiment of the present invention, the audio jockey 102 that provides an open voice service extracts and synchronizes its own voice information (PTS) of the video with the voice data to be transmitted in order to synchronize its voice with the video of the currently broadcast channel. (Encoding) creates an MPEG-2 Audio Transport Stream (MPEG-2 Audio TS) and sends it in an IP packet.

A viewer who wants to watch a broadcast with an open voice service selects a voice service of a desired audio jockey 102 by accessing the service management server 200 through a DVR set-top box. In the set-top box 300, the broadcasted broadcast is buffered internally to a hard disk (HDD), and a voice service server 200 (personal voice broadcasting station) which performs the selected open voice service is connected to receive a voice service. .

At this time, the set-top box 300 decodes the MPEG-2 audio transport stream being received and the MPEG-2 video transport stream being buffered together, and the PTS of the image buffered on the hard disk (HDD) and the received audio. Synchronize using PTS.

The set-top box 300 transmits the synchronized broadcast to the TV 400, and the viewer can receive and watch the broadcast synchronized with the video and the audio through the TV 400.

As a result, the viewer can additionally select the voice of the broadcast that suits his or her taste, thereby adding fun and interest to the broadcast, thereby allowing a wide range of viewing rights.

In addition, the viewers themselves can participate directly in the broadcast, and the broadcasting station is in a position to compete with the viewers, thereby enhancing the quality of the broadcast, and ultimately, the viewer can be provided with a quality improvement broadcast.

Detailed configuration of the open voice service system and the detailed configuration of the voice service server (100, 600, 700), the service management server 200, the set-top box 300 as individual components will be described in detail with reference to Figs. do.

2 is a configuration diagram of a voice service server 100 according to an embodiment of the present invention, wherein the voice service server 100 is a server providing an open voice service in an open voice service system according to an exemplary embodiment of the present invention. .

At this time, the voice service server 100 is configured in one or more in the open voice service system to provide a single voice service to one voice service server 100, a single voice service server 100 is One or more voice services may be provided.

The open voice service system is an open voice service system in digital broadcasting including a digital broadcast server 500 that provides digital broadcasting, and the voice service server 100 receives a digital broadcast stream from the digital broadcast server 500. A video information receiver 110 for extracting video information, a voice information input unit 120 for inputting audio information on the digital broadcast stream, and a PTS synchronization unit 130 for synchronizing the PTS of the audio information with respect to the video information And a TS generator 140 for generating a transport stream (TS) of voice information synchronized with the PTS, and a transmitter (150) for transmitting the transport stream of the voice information.

In the embodiment of the present invention, the digital broadcast is described as being serviced based on MPEG-2, but it is possible to separate the video information and the audio information, and the standard of all the images that can synchronize the PTS is the standard of the present invention. Note that it is included in the category.

The MPEG-2 has a reference time of 27 MHz, which is a system time clock (STC) for synchronous reproduction of the video information and audio information, and is referred to for reproduction by the STC of the decoder during encoding. .

In addition, the MPEG-2 video and audio each have a decoding reproduction unit called an access unit, and a time stamp indicating where to decode and reproduce the reference time for each unit is PTS (Presentation time stamp) of the PES packet header. It is described as a Decoding Time Stamp (DTS).

Therefore, after receiving the digital broadcast of the digital broadcast server 500, the voice service server 100 divides it into image information and voice information and refers to the PTS of the separated image information. The video information of the digital broadcast and the digital broadcast in the set-top box (300) receiving the audio transport stream by synchronizing the PTS of the audio information input from the 120 with the PTS of the video information and transmits it by IP packetization; It is possible to synchronize the voice information transmitted from the voice service server.

As such, the open voice service system in digital broadcasting according to an embodiment of the present invention can provide a variety of voice services for the same video by providing an open voice service in conjunction with a broadcast provided by a digital broadcasting station, thereby providing viewers with enjoyment of viewing. Can double.

3 is a configuration diagram of a service management server 200 according to an embodiment of the present invention, wherein the service management server 200 manages a connection path and voice service server related information of the voice service server 100. The server manager 210 may include a broadcast information manager 220 that manages and provides a broadcast schedule of the digital broadcast server 500 and a voice service provision schedule of the voice service server 100 corresponding thereto.

In addition, the service management server 200 may further include a member manager 250 for authenticating the set-top box 300 using terminal-related information transmitted from the set-top box 300.

In addition, the service management server 200 may further include a connection status management unit 240 that grasps the connection status between the set-top box 300 and the voice service server 100 or distributes load appropriately according to the connection status.

In addition, the service management server 200 may further include a network manager 230 that checks and grasps a network state and an accessible state of the set-top box 300 that receives the voice service server 100 and the open voice service. It may be.

4 is a configuration diagram of a set-top box 300 according to an embodiment of the present invention, the set-top box 300 is a broadcast information demultiplexer 330 for receiving the digital broadcast stream to extract the image information, the A voice information receiver 340 for receiving the transport stream of the voice information from one of the voice service servers 100, a video decoder 380 for decoding and outputting the video information, and a voice for decoding and outputting the voice information The decoder 390 includes a broadcast controller 332 for controlling and synchronizing the video decoder 380 and the audio decoder 390 by using the PTS of the video information and the audio information.

The broadcast control unit 332 is a reference time of the STC unit 331 referencing the SCR (System Clock Reference) described in the digital broadcast stream received by the broadcast information demultiplexer 330 and the broadcast information demultiplexer ( Based on the PTS of the image information extracted at 330, the PTS of the voice information received by the voice information receiver 340 is synchronized and reproduced.

In addition, the set-top box 300 further includes an image information buffer unit 350 that buffers the image information, and an audio information buffer unit 370 that buffers the audio information, thereby controlling synchronization of the broadcast controller 332. Can be configured to be smooth.

In this case, a buffer for controlling the synchronization error between the buffer of the image information buffer unit 350 and the buffer of the audio information buffer unit 370 to a predetermined level or less to maintain the preset level to be controlled by the broadcast control unit 332. More preferably, the control unit 360 is further included. The buffer control can be controlled in hardware or software.

The set-top box 300 may extract the PTS of the video information of the broadcast provided by the digital broadcasting station by the buffer controller 360 to completely synchronize the PTS of the open voice service provided by the voice service server to provide to the viewer. Since video and audio are synchronized regardless of network environment, they can service not only recording but also real time broadcasting.

In addition, the set top box 300 may further include a terminal information unit 320 for providing terminal related information such as unique identification information thereof, and the service management unit 310 that may interface with the service management server 200. Further comprising, it is preferable to configure to facilitate the connection and membership, withdrawal, to the voice service server 100 through this.

5 is a flowchart illustrating a voice service providing method according to an embodiment of the present invention, and FIG. 6 is a flowchart illustrating a voice service receiving method according to an embodiment of the present invention.

Referring to FIG. 5, an open voice service providing method according to an exemplary embodiment of the present invention is a service method of an open voice service system in a digital broadcast including a digital broadcast server for providing digital broadcast. Receiving and extracting the video information (S51), the voice service server inputs the voice information on the digital broadcast stream (S52), the voice service server to synchronize the PTS of the voice information with respect to the video information Step S53, the voice service server generating a transport stream of voice information synchronized with the PTS (S54), and the voice service server transmitting a transport stream of the voice information (S55). do.

In addition, referring to FIG. 6, in the open voice service receiving method, a set-top box receives a digital broadcast stream from the digital broadcast server to extract image information (S61), and the set-top box is synchronized with the digital broadcast stream. Receiving a transport stream of the voice information from a voice service server providing a service (S62), the set-top box controls and synchronizes using the video information and the PTS of the voice information (S65), the set-top box And decoding (S66) the image information and the audio information.

In this case, in the open voice service receiving method, the set-top box buffers the video information (S63), the set-top box buffers the voice information (S63), and the set-top box buffers the video information. The method may further include controlling the synchronization error of the buffer of the voice information to a predetermined level or less and maintaining the control level at a predetermined level (S64).

The foregoing embodiments and advantages are merely exemplary and are not to be construed as limiting the present invention. However, the present invention is not limited to the above-described embodiments, and various changes and modifications may be made by those skilled in the art without departing from the scope of the present invention. .

100: voice service server 110: video information receiver
120: voice information input unit 130: PTS synchronization unit
140: TS generating unit 150: transmitting unit
200: service management server 210: voice server management unit
220: broadcast information management unit 230: network management unit
240: access status management unit 250: member management unit
300: set-top box 310: service management
320: terminal information unit 330: broadcast information demultiplexer
331: STC unit 332: broadcast control unit
340: audio information receiver 350: video information buffer
360: buffer control unit 370: voice information buffer unit
380: Video decoder unit 390: Audio decoder unit
400: TV

Claims (8)

In an open voice service system in digital broadcasting, including a digital broadcasting server that provides digital broadcasting,
A video information receiver for receiving a digital broadcast stream from a digital broadcast server and extracting video information;
A voice information input unit for inputting voice information relating to the digital broadcast stream;
A PTS synchronization unit for synchronizing the PTS of the audio information with respect to the video information;
A TS generator for generating a transport stream of voice information synchronized with the PTS;
At least one voice service server having a transmitter for transmitting the transport stream of the voice information;
A broadcast information demultiplexer which receives the digital broadcast stream and extracts image information;
A voice information receiver configured to receive a transport stream of the voice information from one of the voice service servers;
An image decoder for decoding and outputting the image information;
A voice decoder for decoding and outputting the voice information;
And a set-top box having a broadcast control unit for controlling and synchronizing the video decoder unit and the audio decoder unit by using the PTS of the video information and the audio information.
The method of claim 1, wherein the set top box
An image information buffer unit for buffering the image information;
A voice information buffer unit for buffering the voice information; And
And a buffer controller for controlling the synchronization error between the buffer of the image information buffer unit and the buffer of the audio information buffer unit to a predetermined level or less so that the broadcast controller can control the synchronization error. .
The method of claim 1,
A voice server manager that manages a connection path and server related information of the voice service server;
And a service information server for managing and providing a broadcast schedule of the digital broadcast server and a schedule of providing a voice service of a voice service server corresponding thereto.
In an open voice service system in digital broadcasting, including a digital broadcasting server that provides digital broadcasting,
A broadcast information demultiplexer which receives a digital broadcast stream from the digital broadcast server and extracts image information;
A voice information receiver configured to receive a transport stream of the voice information from a voice service server providing a voice service synchronized with the digital broadcast stream;
An image decoder for decoding and outputting the image information;
A voice decoder for decoding and outputting the voice information;
And a set-top box including a broadcast control unit for controlling and synchronizing the video decoder unit and the audio decoder unit by using the PTS of the video information and the audio information.
The method of claim 4, wherein
A service management server providing a connection path of the voice service server and providing a broadcast schedule of the digital broadcasting server and a voice service schedule of a voice service server corresponding thereto;
The set top box further includes a service management unit for interfacing with the service management server.
The method of claim 4, wherein
The set top box is
An image information buffer unit for buffering the image information;
A voice information buffer unit for buffering the voice information; And
And a buffer controller for controlling the synchronization error between the buffer of the image information buffer unit and the buffer of the audio information buffer unit to a predetermined level or less so that the broadcast controller can control the synchronization error. .
A service method of an open voice service system in digital broadcasting, including a digital broadcasting server providing digital broadcasting,
a) receiving a digital broadcast stream and extracting image information from the digital broadcast server;
b) inputting voice information on the digital broadcast stream by a voice service server;
c) synchronizing, by the voice service server, the PTS of the voice information with respect to the video information;
d) generating, by the voice service server, a transport stream of voice information synchronized with the PTS;
e) transmitting, by the voice service server, a transport stream of the voice information;
f) extracting image information by the set-top box receiving the digital broadcast stream;
g) receiving, by the set-top box, a transport stream of the voice information from one of the voice service servers;
h) synchronizing a set-top box using a PTS of the video information and the audio information;
i) The set-top box decoding and outputting the video information and the audio information service method of an open voice service system in a digital broadcast.
A service method of an open voice service system in digital broadcasting, including a digital broadcasting server providing digital broadcasting,
a) a set-top box receiving a digital broadcast stream from the digital broadcast server and extracting image information;
b) receiving, by the set-top box, a transport stream of the voice information from a voice service server providing a voice service synchronized to the digital broadcast stream;
c) a set-top box controlling and synchronizing the PTS of the video information and the audio information;
d) decoding and outputting the video information and the audio information by a set-top box;
e) buffering the image information by the set top box;
f) buffering the voice information by the set top box; And
g) the set-top box controlling the synchronization error between the buffer of the image information and the buffer of the audio information to a predetermined level or less to maintain a predetermined level so as to be controllable. Of service method.

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