KR20230052565A - System and Method for Broadcast Channel Transport Stream Conversion - Google Patents

Abstract

The present invention relates to a broadcast channel transport stream conversion system and method. The broadcast system of the present invention includes: a compression multiplexing part that performs encoding and multiplexing to generate and output a transport stream from broadcast data to a network; and a switching control part that samples the broadcast data to determine whether it is a regular broadcast or regular wave broadcast, and generates control information for controlling the compression multiplexing part to transmit a regular broadcast stream or a regular wave data stream according to the determination result.

Description

Broadcast channel transport stream conversion system and method {System and Method for Broadcast Channel Transport Stream Conversion}

The present invention relates to a system and method for switching a broadcast channel transport stream, and in particular, automatically transmits a broadcast channel during a fixed wave time when retransmitting a channel of a PP (Program Provider, broadcast channel use business) broadcaster on the side of a paid broadcasting operator. It relates to a system and method for converting a stream.

In general, PP broadcasting companies that provide program broadcasting by channel, such as terrestrial and general channels, stop regular broadcasting from the end of the last program organized in the regular broadcasting time until the next regular broadcasting begins (off-the-air). ) may be performed. The PP broadcasting company emits a regular wave sound at a constant frequency along with a color bar-like screen in the stationary wave time zone.

Paid broadcasting operators such as IPTV and cable retransmit terrestrial, comprehensive, and other PP broadcasting companies' channels through baseband and compression multiplexing systems to broadcasting networks. However, pay broadcasting operators have a problem in that unnecessary traffic is transmitted to the broadcasting network when retransmitting regular wave content transmitted by PP broadcasters during regular wave broadcasting in real time. This waste of traffic increases energy consumption to process it in networks and terminals, and accordingly, there is a problem that does not conform to the recent ESG (Environmental, Social and Governance) management vitalization strategy.

Therefore, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to retransmit a channel of a PP broadcasting company on the side of a pay broadcasting operator, for a regular wave broadcasting channel during a regular wave time when real-time regular broadcasting is stopped. It is an object of the present invention to provide a broadcasting system and method for automatically converting a real-time regular broadcasting transport stream into a regular wave data stream.

In addition, another object of the present invention is to compare and determine pre-registered data for a regular wave based on either an audio or video signal in determining whether the broadcasting system automatically broadcasts a regular wave, but the audio signal for more accurate determination. It is an object of the present invention to provide a broadcasting system and method capable of comparing and judging video signals after comparison.

And, another object of the present invention is to reduce waste of traffic and reduce network traffic by directly transmitting fixed-wave broadcasting video and fixed-wave broadcasting audio data as fixed-wave data streams without compression encoding and multiplexing on the fixed-wave broadcasting channel automatically in the broadcasting system. And to provide a broadcasting system and method capable of reducing power consumed for transmission and reception of related data in a terminal.

First, to summarize the characteristics of the present invention, a broadcast system according to an aspect of the present invention for achieving the above object is a compression multiplexing unit that performs encoding and multiplexing to generate and output a transport stream from broadcast data to a network. ; and a conversion control unit for generating control information for controlling the compression and multiplexing unit to transmit a regular broadcast stream or a regular wave data stream according to a result of sampling the broadcast data and determining whether regular broadcasting or regular wave data stream is performed on the sample broadcast data. include

The compression multiplexing unit outputs a transport stream for the regular broadcast generated from the broadcast data or outputs a pre-stored data stream for stationary wave during the stationary wave time of the broadcast data according to the control information.

The broadcasting system according to the present invention may further include a baseband processing unit that performs signal processing to generate baseband broadcasting data from high-frequency broadcasting signals.

The switching control unit may include a control information generation unit that generates the control information including information about a channel to be switched or information about stream designation for outputting the data stream for the regular wave.

The switching control unit may include a control information generation unit that generates the control information including information on a return target channel or return notification information for outputting the transport stream for the regular broadcast.

The switching control unit may receive and store the data stream for the regular wave through a user interface, and transmit the data stream for the regular wave to the compression/multiplexer for storage in advance.

The switching control unit may include an audio determination unit that determines whether the regular broadcasting or the regular broadcasting is progressed by comparing whether sample audio data among the broadcasting data is matched with a regular wave audio pattern.

The regular wave audio pattern may include frequency information and amplitude information of an audio signal.

The switching control unit may include an image determining unit that determines whether the regular broadcasting or the regular broadcasting is progressed by comparing whether sample image data among the broadcasting data matches a regular wave image pattern.

The regular wave image pattern may include information about an image for more than one frame.

The switching control unit compares whether sample audio data of the broadcasting data matches with a stereoscopic audio pattern to determine whether the stereoscopic wave is progressing, compares sample image data of the broadcasting data with a stereoscopic image pattern, and determines whether the stereoscopic wave image pattern matches. If it is determined that the progress of the standing wave is determined, it may be finally determined as the progress of the standing wave.

During the regular wave time during which the compression/multiplexer outputs the data stream for the regular wave, the switching control unit determines that the regular broadcast is in progress if the sample audio data of the broadcast data is not matched with the stereoscopic audio pattern within a predetermined degree of similarity. can do.

According to the present invention, the broadcasting system may be operated by a first broadcasting service provider, process the high-frequency broadcasting signal from the system of the second broadcasting service provider, and provide the broadcasting system to a user terminal.

Further, a broadcasting method for switching a transport stream of a broadcasting channel in a broadcasting system according to another aspect of the present invention includes determining whether regular broadcasting or regular broadcasting is performed for sample broadcasting data; and generating control information for controlling transmission of a regular broadcast stream or a regular wave data stream according to a result of the determination.

According to the broadcasting system and method for switching broadcast channel transport streams according to the present invention, a pay broadcaster automatically converts a real-time regular broadcasting transport stream for a regular wave broadcasting channel during a regular wave time when real-time regular broadcasting of a PP broadcaster is stopped. It can be converted into a data stream and transmitted.

In addition, according to the broadcasting system and method for switching broadcast channel transport streams according to the present invention, the broadcasting system side automatically compares and determines whether or not regular wave broadcasting is performed based on any one of audio and video signals with pre-registered regular wave data. , and for more accurate determination, after comparing the audio signal and comparing the video signal, it may be finally determined that the wave is progressing.

And, according to the broadcasting system and method for switching broadcast channel transport streams according to the present invention, in the prior art, transmission was performed after compression and multiplexing for a regular wave broadcasting channel like real-time regular broadcasting, but compression encoding was performed for a regular wave broadcasting channel. And by directly transmitting straight-wave broadcasting video and straight-wave broadcasting audio data as straight-wave data streams without multiplexing, it is possible to reduce waste of unnecessary traffic as in the prior art and reduce power consumed for transmission and reception of related data in the network and terminal. . Accordingly, it can contribute to the recent ESG (Environmental, Social and Governance) strategy for revitalization.

The accompanying drawings, which are included as part of the detailed description to aid understanding of the present invention, provide examples of the present invention and explain the technical idea of the present invention together with the detailed description.
1 is a diagram for explaining a broadcast system for switching a transport stream of a broadcast channel according to an embodiment of the present invention.
2 is a detailed block diagram of a switching control unit according to an embodiment of the present invention.
3 is a diagram for explaining a stationary wave database that maintains data streams for stationary waves for each channel according to an embodiment of the present invention.
4 is a flowchart illustrating automatic switching to a regular wave broadcasting service during real-time regular broadcasting service in a broadcasting system according to an embodiment of the present invention.
5 is an example of the stereowave audio patterns according to an embodiment of the present invention.
6 is an example of orthogonal wave image patterns according to an embodiment of the present invention.
7 is a flowchart illustrating automatic switching to a regular real-time broadcasting service in a regular wave broadcasting service in a broadcasting system according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. At this time, the same components in each drawing are represented by the same reference numerals as possible. In addition, detailed descriptions of already known functions and/or configurations will be omitted. In the following description, parts necessary for understanding operations according to various embodiments will be mainly described, and descriptions of elements that may obscure the gist of the description will be omitted. Also, some elements in the drawings may be exaggerated, omitted, or schematically illustrated. The size of each component does not entirely reflect the actual size, and therefore, the contents described herein are not limited by the relative size or spacing of the components drawn in each drawing.

In describing the embodiments of the present invention, if it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of a user or operator. Therefore, the definition should be made based on the contents throughout this specification. Terms used in the detailed description are only for describing the embodiments of the present invention, and should not be limiting. Unless expressly used otherwise, singular forms of expression include plural forms. In this description, expressions such as "comprising" or "comprising" are intended to indicate any characteristic, number, step, operation, element, portion or combination thereof, one or more other than those described. It should not be construed to exclude the existence or possibility of any other feature, number, step, operation, element, part or combination thereof.

In addition, terms such as first and second may be used to describe various components, but the components are not limited by the terms, and the terms are used for the purpose of distinguishing one component from another. used only as

1 is a diagram for explaining a broadcasting system 100 for switching a broadcast channel transport stream according to an embodiment of the present invention.

Referring to FIG. 1, a broadcasting system 100 according to an embodiment of the present invention interworks with a baseband processing unit 110, a compression multiplexing unit 120, a conversion control unit 130, and the broadcasting system 100 on a network. It includes a user terminal 150 that does.

The broadcasting system 100 of the present invention is operated by a first broadcasting operator, and the broadcasting system 100 processes a high-frequency broadcasting signal from a system of a second broadcasting operator to provide broadcasting content to the user terminal 150. can The first broadcasting operator may be a paid broadcasting operator such as IPTV and cable. The second broadcasting business operator may be a PP (Program Provider, Broadcasting Channel Using Business) broadcasting business operator that provides program broadcasting for each channel, such as terrestrial wave and comprehensive broadcasting, in real time. Each component of the broadcasting system 100 according to an embodiment of the present invention may be implemented with hardware such as a semiconductor processor, software such as an application program, or a combination thereof.

The user terminal 150 may interwork through a wired or wireless network supporting wired Internet communication, wireless Internet communication such as WiFi or WiBro, mobile communication such as WCDMA, LTE, or 5G, or wireless access in vehicular environment (WAVE) wireless communication. The user terminal 150 includes a wired terminal such as a desktop PC and other communication-only terminals, and in addition, depending on the communication environment, it may include a smart phone, a wearable device capable of making voice / video phone calls, a tablet PC, a notebook PC, and other wireless terminals. there is.

The baseband processing unit 110 performs signal processing to generate baseband broadcasting data from radio frequency (RF) broadcasting signals. The high-frequency broadcasting signal may be received from a system of a PP broadcasting operator (second broadcasting operator) that provides real-time program broadcasting for each channel, such as terrestrial wave and comprehensive broadcasting.

The compression multiplexing unit 120 performs encoding and multiplexing to generate and output a transport stream to a network from baseband broadcasting data output from the baseband processing unit 110 . The compression multiplexing unit 120 generates a transport stream by combining audio and video data included in the broadcast data according to a transmission protocol to the network, and performs multiplexing (e.g., time division multiplexing) to enable simultaneous service to a plurality of users. Alternatively, encoding and multiplexing for data compression may be performed according to a frequency division multiplexing) method (eg, MPEG-2 system, etc.).

The conversion control unit 130 samples the broadcast data output from the baseband processing unit 110 and compresses the sampled sample broadcast data (sample audio data or sample image data) according to the result of determining whether regular broadcasting or regular broadcasting is performed. The multiplexing unit 120 generates control information for controlling transmission of regular broadcasting or regular wave data streams.

The compression multiplexing unit 120 generates and outputs a transport stream for the regular broadcast from broadcast data output from the baseband processing unit 110 according to the control information from the switching control unit 130, or outputs the transport stream to a predetermined memory (not shown). ) may be output during the time of the stationary wave of the broadcasting data.

For example, when a regular broadcasting time is changed to a regular wave time, the conversion control unit 130 generates the control information including information about a channel to be switched or information about stream designation for outputting the data stream for the regular wave. can In addition, when the regular broadcasting time is changed from the regular broadcasting time, the switching control unit 130 can generate the control information including information on a return target channel or return notification information for outputting a transport stream for the regular broadcasting. .

2 is a specific block diagram of the switching controller 130 according to an embodiment of the present invention.

FIG. 3 is a diagram for explaining the stationary wave database 139 of FIG. 2 that maintains data streams for stationary waves for each channel according to an embodiment of the present invention.

Referring to FIGS. 2 and 3 , the conversion control unit 130 according to an embodiment of the present invention includes a user interface 131 and includes an audio determination unit 210 and an image determination unit 220. It includes a unit 132, and includes a control information generation unit 133 and a stationary wave database 139. Each component of the conversion controller 130 may be implemented with hardware such as a semiconductor processor, software such as an application program, or a combination thereof.

The user interface 131 includes a display device, a touch screen, an input/output device for inputting/outputting data, and buttons for inputting/outputting information by a user or various necessary settings. A user may input a data stream for a straight wave for each channel as shown in FIG. 3 through the user interface 131 , and the user interface 131 may store the data stream for a straight wave for each channel in the database 139 . In addition, if necessary, the user interface 131 may transmit the data stream for each channel to the compression multiplexing unit 120 so that the compression multiplexing unit 120 manages them in a predetermined memory (not shown).

As shown in FIG. 3, the data stream for regular waves can be managed to be different information (data A, data B, data C,,,,) for each channel (AAA, BBB, CCC,,,,,), however, It is not limited, and it is also possible that the data stream for stationary waves for all or some channels is the same. The data stream for each stationary wave may be stored and managed in a predetermined file format, and includes data streams for audio and video (still image or video). That is, each of the data streams for the standing wave includes a standing wave audio pattern (see FIG. 5) and a standing wave image pattern (see FIG. 6), which are references for comparison, as described below, and the standing wave audio pattern is a part of the audio signal. It includes frequency information and amplitude information, and the regular wave image pattern may include information about an image (still image or video) for one or more frames.

The audio determination unit 210 samples audio data among the broadcast data output from the baseband processing unit 110 at a predetermined sample rate, and for the sampled audio data, the stereowave audio pattern of the stereowave database 139 (see FIG. 5) ) and matching status to determine whether a regular broadcast or regular wave is in progress. The audio determination unit 210 may determine whether the regular broadcasting or regular wave proceeds by channel (AAA, BBB, CCC,,,,,,).

The image determination unit 220 samples image data among the broadcast data output from the baseband processing unit 110 at a predetermined sample rate, and for the sampled image data, a stereowave image pattern of the stereowave database 139 (see FIG. 6) It is possible to determine whether or not the regular broadcasting or regular wave proceeds by comparing whether or not it matches with. The video determination unit 220 may determine whether the regular broadcasting or regular wave is progressing by channel (AAA, BBB, CCC,,,,,).

The control information generating unit 133 determines whether the compression/multiplexing unit 120 performs regular broadcasting or regular wave based on a result of the combination (one or more decisions) of the determination of the audio determination unit 210 or the determination of the video determination unit 220. Control information for controlling the data stream to be transmitted is generated.

The compression multiplexing unit 120 receives, from the control information generating unit 133, the control information including information on a channel to be switched for output of a data stream for a stationary wave or information on stream designation, in response to receiving the control information in a predetermined memory (not shown) may output a data stream for straightening waves stored in advance during the straightening wave time of the broadcast data.

In addition, when the compression multiplexing unit 120 receives the control information including information on the return target channel or return notification information for outputting the transport stream for the regular broadcast from the control information generation unit 133, A transport stream for the regular broadcast may be generated from broadcast data output from the baseband processing unit 110 and output at a regular broadcast time of the broadcast data.

As described above, the broadcasting system 100 for switching broadcast channel transport streams in the broadcasting system of the present invention can determine in real time whether regular broadcasting or regular wave is progressing with respect to sample broadcasting data, and according to the result of the determination, the broadcasting system 100 can determine whether regular broadcasting or regular wave is performed. It is possible to generate control information for controlling transmission of a broadcast or regular wave data stream, and according to the control information, the transport stream for the regular broadcast generated from the broadcast data is output, and automatically stored in advance when the regular wave time comes. A data stream for straightening waves can be output during the straightening wave time of the broadcast data.

Accordingly, in the broadcasting system 100 of the present invention, a first broadcaster, such as a pay broadcasting company, automatically broadcasts regular real-time regular broadcasting on a regular wave broadcasting channel during a regular wave time when real-time regular broadcasting of a second broadcaster, such as a PP broadcaster, is stopped. The transport stream may be converted into a data stream for stationary waves and transmitted. And, in the prior art, transmission was performed after compressing and multiplexing a regular wave broadcasting channel like real-time regular broadcasting, but for a regular wave broadcasting channel, straight wave broadcasting video and regular wave broadcasting audio data were directly transmitted as a data stream for regular wave broadcasting without encoding for compression multiplexing. By transmitting, the broadcasting system 100 of the present invention can reduce waste of unnecessary traffic as in the prior art and reduce power consumed for transmission/reception of related data in the network and terminal. As a result, it was possible to contribute to the recent ESG management revitalization strategy.

Hereinafter, automatic switching between a regular broadcast service and a regular wave broadcast service in a broadcast system according to an embodiment of the present invention will be described in more detail with reference to FIGS. 4 to 7 .

4 is a flowchart for explaining automatic switching to a regular wave broadcasting service during real-time regular broadcasting service in the broadcasting system 100 according to an embodiment of the present invention.

5 is an example of the stereowave audio patterns according to an embodiment of the present invention.

6 is an example of orthogonal wave image patterns according to an embodiment of the present invention.

Referring to FIG. 4, first of all, the baseband processing unit 110 performs radio frequency (RF) broadcasting from a system of a PP broadcasting operator (second broadcasting operator) that provides real-time program broadcasting for each channel such as terrestrial wave and comprehensive broadcasting during regular broadcasting time. Signal processing is performed to generate baseband broadcasting data (digital data) by receiving a signal, and outputting the broadcasting data to the compression multiplexing unit 120 (S110).

The compression multiplexing unit 120 performs encoding and multiplexing to generate and output a transport stream to a network from the baseband broadcasting data output from the baseband processing unit 110 (S111). The compression multiplexing unit 120 generates a transport stream, that is, a regular broadcast stream by combining audio and video data included in the broadcast data according to a transmission protocol to the network, and to enable simultaneous service to a plurality of users. Encoding and multiplexing for data compression may be performed according to a multiplexing (eg, time division multiplexing or frequency division multiplexing) method (eg, MPEG-2 system, etc.). The compression multiplexing unit 120 transmits the regular broadcast stream in real time to the user terminal 150 through the network (S112), and the user terminal 150 can receive it and reproduce the corresponding video and audio (S113). For example, the user terminal 150 recognizes that the stream information of a channel included in the PMT (Program Map Table) of MPEG2-TS, which is a real-time broadcasting channel stream transmission protocol, is a regular broadcasting stream, and receives the corresponding data stream to store the received data. Audio and/or video of the included real-time regular broadcasting stream is output to a TV screen or the like.

The user can store the data stream for each channel as shown in FIG. 3 in the compression multiplexing unit 120 at any time. The user may input the data stream for regular waves for each channel as shown in FIG. 3 to the compression multiplexing unit 120 through a predetermined input/output device. Alternatively, the data stream for regular waves for each channel as shown in FIG. 3 may be transmitted to the compression multiplexing unit 120 through the switching control unit 130. For example, a user may input a data stream for straight waves for each channel as shown in FIG. 3 through the user interface 131 of the switching controller 130, and the user interface 131 converts the data stream for long waves for each channel to a long wave database. (139). In addition, if necessary, a transmission command (S120) may be input through the user interface 131, and accordingly, the user interface 131 transmits one or more stationary wave data streams for each channel of the stationary wave database 139 to a compression multiplexing unit. It can be transmitted to 120 (S121) so that the compression multiplexing unit 120 can manage it in a predetermined memory (not shown) (S122).

In the constant wave database 139 of the switching control unit 130 and a predetermined memory (not shown) of the compression multiplexing unit 120, as shown in FIG. 3, the data stream for each channel (AAA, BBB, CCC,,,,, ) can be managed to be different information (data A, data B, data C,,,,), but it is not limited thereto, and it is okay that the data stream for regular waves for all or some channels is the same. The data stream for each stationary wave may be stored and managed in a predetermined file format, and includes data streams for audio and video (still image or video). That is, each of the data streams for the standing wave includes a standing wave audio pattern (see FIG. 5) and a standing wave image pattern (see FIG. 6), which are references for comparison, and the standing wave audio pattern includes frequency information and amplitude of the audio signal. information, and the regular wave image pattern may include information about an image (still image or video) for more than one frame.

On the other hand, while continuously monitoring audio data and/or video data by the switching control unit 130, when the regular broadcasting time passes and is changed to the regular wave time, the broadcasting system 100 of the present invention according to the following embodiment According to the procedure, the regular real-time broadcasting transport stream for the regular wave broadcasting channel is automatically converted into a data stream for the regular wave and transmitted.

First, the audio determination unit 210 of the switching control unit 130 samples audio data among broadcast data output from the baseband processing unit 110 at a predetermined sample rate (S130), It is determined whether a regular broadcast or a regular wave is progressed by comparing the matching with the stereowave audio pattern (see FIG. 5) in the database 139 (S131). The audio determination unit 210 may determine whether the regular broadcasting or regular wave proceeds by channel (AAA, BBB, CCC,,,,,,). As exemplified in (a), (b), (c), and (d) of FIG. 5, the standing wave audio pattern includes at least frequency information and amplitude information of the audio signal, and is an audio signal profile for a predetermined time. may be The audio determination unit 210 determines whether the sample audio data is similar in frequency and amplitude to the stereophonic audio pattern of the stereophonic database 139, and determines that the sample audio data is matched when the similarity is equal to or higher than a predetermined threshold.

In addition, the image determination unit 220 samples image data among the broadcast data output from the baseband processing unit 110 at a predetermined sample rate (S140), and selects one of the stationary wave databases 139 for the sampled sample image data (S140). It is possible to determine whether the regular broadcasting or the regular broadcasting is progressing by comparing the matching with the regular wave image pattern (see FIG. 6) during the frame or more (S141). The video determination unit 220 may determine whether the regular broadcasting or regular wave is progressing by channel (AAA, BBB, CCC,,,,,). As exemplified in (a) and (b) of FIG. 6 , the standing wave image pattern includes predetermined still image information, but is not limited thereto, and the standing wave image pattern may be made of a moving image. Here, the image determination unit 220 may use an algorithm such as 'Different Hash', which is well-known in the art, which has a fast processing time, in comparison between the sample image data and the regular wave image pattern (data), and determines the similarity of the images. If the similarity is higher than a predetermined threshold value, it can be determined that there is a match.

The control information generating unit 133 determines whether the compression/multiplexing unit 120 performs regular broadcasting or regular wave based on a result of the combination (one or more decisions) of the determination of the audio determination unit 210 or the determination of the video determination unit 220. Control information for controlling transmission of the data stream is generated (S150) and transmitted to the compression/multiplexing unit 120 (S151). That is, if it is determined by the audio determination unit 210 or the image determination unit 220 that the forward wave has started, the compression multiplexing unit 120 controls the transmission of the data stream for the straight wave without encoding and multiplexing.

The compression multiplexing unit 120, from the control information generation unit 133, information on the switching target channel for outputting the data stream for regular waves (eg, AAA, BBB, CCC, ,,,, designating any one of information) or stream designation information (e.g., information designating any one of data A, data B, and data C) is received, the regular broadcasting mode is changed to the regular wave time mode. (S152) and transmits the corresponding data stream for straightening waves previously stored in a predetermined memory (not shown) during the straightening wave time of the broadcast data (S153). The compression multiplexing unit 120 transmits the data stream for regular waves to the user terminal 150 in real time through the network (S153), and the user terminal 150 can receive it and reproduce the corresponding video and/or audio (S154). . For example, the user terminal 150 recognizes that stream information of a channel included in the PMT (Program Map Table) of MPEG2-TS, which is a real-time broadcasting channel stream transmission protocol, has been changed to a regular broadcasting stream instead of a regular broadcasting stream, and the corresponding data stream is received and the stereowave audio and/or video included in the received data is output to a TV screen or the like.

For real-time processing as described above, it is preferable that the audio determination unit 210 first determines whether or not the forward wave proceeds as described above. However, the present invention is not limited thereto, and in some cases, the image determination unit 220 may first determine whether the forward wave proceeds as described above.

In addition, if the audio determination unit 210 first determines whether or not a standing wave progresses with respect to the sample audio data among the broadcast data as described above, and determines that a standing wave progresses, for more accurate determination, the image determination unit 220 then Additionally, it is most preferable to finally determine that the progression of the stationary wave is determined by determining whether the stationary wave progresses with respect to the sample image data among the broadcast data as described above.

FIG. 7 is a flowchart illustrating automatic switching to a real-time regular broadcasting service among regular wave broadcasting services in the broadcasting system 100 according to an embodiment of the present invention.

Referring to FIG. 7, even while the straight wave time is maintained, the baseband processing unit 110 transmits a high frequency (RF) signal from a system of a PP broadcasting company (second broadcasting company) that provides real-time program broadcasting for each channel, such as terrestrial wave and comprehensive broadcasting. ) Receives a broadcast signal, performs signal processing to generate baseband broadcast data (digital data), and compresses and multiplexes the broadcast data including audio data or video data during the constant wave time as shown in FIGS. 5 and 6 It can be output to the unit 120 (S210).

In the present invention, while the straight wave time is maintained, the compression multiplexing unit 120 does not automatically perform the encoding and multiplexing, and as described in FIG. 4, the corresponding regular wave data stream stored in advance in a predetermined memory (not shown) is transmitted In the straight wave time mode for (S220), the constant wave data stream can be transmitted to the user terminal 150 through a network during the straight wave time of the broadcast data (S221). The compression multiplexer 120 transmits the data stream for regular waves in real time (S221), and the user terminal 150 can receive it and reproduce the corresponding video and/or audio (S225). For example, the user terminal 150 recognizes that stream information of a channel included in the PMT (Program Map Table) of MPEG2-TS, which is a real-time broadcasting channel stream transmission protocol, is changed to a regular broadcasting stream instead of a regular broadcasting stream, and the corresponding data stream is received and the stereowave audio and/or video included in the received data is output to a TV screen or the like.

On the other hand, while continuously monitoring audio data and/or video data by the switching control unit 130, when the regular broadcasting time is changed after the regular wave time, the broadcasting system 100 of the present invention according to the following embodiment According to the procedure, the regular broadcasting channel is automatically converted from a regular wave data stream to a real-time regular broadcasting transport stream and transmitted.

The audio determination unit 210 of the switching control unit 130 samples audio data among the broadcast data output from the baseband processing unit 110 at a predetermined sample rate (S230), and for the sampled audio data, a stationary wave database ( 139), it is determined whether a regular broadcast or a regular broadcast is progressing (S231). The audio determination unit 210 may determine whether the regular broadcasting or regular wave proceeds by channel (AAA, BBB, CCC,,,,,,). As exemplified in (a), (b), (c), and (d) of FIG. 5, the standing wave audio pattern includes at least frequency information and amplitude information of the audio signal, and is an audio signal profile for a predetermined time. may be The audio determination unit 210 determines whether the sample audio data is similar in frequency and amplitude to the stationary wave audio pattern of the stationary wave database 139, and determines that the sample audio data is not matched if the similarity is calculated below a predetermined threshold. . That is, when the regular broadcasting time starts, the audio data of the actual broadcasting data is sampled and comes out as a waveform with irregular frequencies and amplitudes. It is judged that it is not, and it is judged that the progress of regular broadcasting has begun.

The control information generating unit 133 generates control information for controlling the compression/multiplexing unit 120 to transmit a regular broadcast or regular wave data stream according to the determination result of the audio determination unit 210 (S240), and compresses the data stream. It is transmitted to the multiplexing unit 120 (S241). That is, when the audio determination unit 210 determines that regular broadcasting has started, the compression multiplexing unit 120 controls the regular wave data stream to return to the real-time regular broadcast stream. However, according to the combination of the determinations of the image determination unit 220 (one or more determinations) as in step S141 of FIG. Although control information for controlling to do so may be generated (S240), the decision by the video determination unit 220 may be omitted because fast processing according to the determination result of the audio determination unit 210 is required as described above.

The compression multiplexing unit 120, from the control information generation unit 133, information on a return target channel for outputting the transport stream for the regular broadcast (eg, any one of AAA, BBB, CCC,,,,, When receiving the control information including information specifying) or return notification information (e.g., channel may be pre-designated, and in this case, activation/deactivation information for return notification), return change from regular wave time mode to regular broadcast mode In step S242, a transport stream for real-time regular broadcasting may be generated from the broadcasting data output from the baseband processing unit 110 and output at the regular broadcasting time of the broadcasting data (S243).

That is, the compression multiplexing unit 120 performs encoding and multiplexing to generate and output a transport stream to a network from the baseband broadcasting data output from the baseband processing unit 110 . The compression multiplexing unit 120 generates a transport stream, that is, a regular broadcast stream by combining audio and video data included in the broadcast data according to a transmission protocol to the network, and to enable simultaneous service to a plurality of users. Encoding and multiplexing for data compression may be performed according to a multiplexing (eg, time division multiplexing or frequency division multiplexing) method (eg, MPEG-2 system, etc.). The compression multiplexing unit 120 transmits the regular broadcasting stream in real time to the user terminal 150 through the network (S243), and the user terminal 150 can receive it and reproduce the corresponding video and audio (S244). For example, the user terminal 150 recognizes that the stream information of a channel included in the PMT (Program Map Table) of MPEG2-TS, which is a real-time broadcasting channel stream transmission protocol, is a regular broadcasting stream, and receives the corresponding data stream to store the received data. Audio and/or video of the included real-time regular broadcasting stream is output to a TV screen or the like.

As described above, when the broadcasting system 100 for switching broadcast channel transport streams according to the present invention is applied, a pay broadcasting operator automatically real-time broadcasting channels for regular broadcasting of PP broadcasting companies during the regular wave time when real-time regular broadcasting is stopped. A regular broadcast transport stream can be converted into a data stream for regular waves and transmitted. In addition, in the prior art, transmission was performed after compression and multiplexing for a regular wave broadcasting channel as in real-time regular broadcasting. By transmitting as a stream, it is possible to reduce waste of conventional unnecessary traffic and reduce power consumed for transmission and reception of related data in a network and a terminal. Accordingly, it can contribute to the recent ESG (Environmental, Social and Governance) strategy for revitalization.

As described above, the present invention has been described by specific details such as specific components and limited embodiments and drawings, but these are provided to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , Those skilled in the art in the field to which the present invention belongs will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Therefore, the spirit of the present invention should not be limited to the described embodiments, and all technical ideas having modifications equivalent or equivalent to these claims as well as the claims to be described later are included in the scope of the present invention. should be interpreted as

Baseband processing unit 110
Compression multiplexing unit (120)
Conversion control unit 130
User terminal 150

Claims (14)

a compression multiplexing unit performing encoding and multiplexing to generate and output a transport stream from broadcast data to a network; and
A switching control unit that determines whether regular broadcasting or regular wave broadcasting is performed by sampling the broadcasting data, and generates control information for controlling the compression/multiplexing unit to transmit the regular broadcasting stream or the regular wave data stream according to the determination result.
A broadcasting system comprising a. According to claim 1,
The broadcasting system according to the control information, wherein the compression and multiplexing unit outputs a transport stream for the regular broadcast generated from the broadcast data or outputs a pre-stored data stream for stationary wave during a stationary wave time of the broadcast data. According to claim 1,
A baseband processing unit that performs signal processing to generate baseband broadcasting data from high-frequency broadcasting signals.
Broadcasting system further comprising a. According to claim 1,
The switching control unit includes a control information generation unit configured to generate the control information including information on a channel to be switched or information on stream designation for outputting the data stream for the fixed wave. According to claim 1,
The switching control unit includes a control information generation unit configured to generate the control information including information on a return target channel or return notification information for outputting a transport stream for the regular broadcast. According to claim 1,
The switching control unit receives and stores the data stream for the regular wave through a user interface, and transmits the data stream for the regular wave to the compression/multiplexer for storage in advance. According to claim 1,
wherein the switching control unit compares whether sample audio data among the broadcasting data matches a regular wave audio pattern, and determines whether the regular broadcasting or the regular broadcasting is progressing. According to claim 7,
The broadcasting system of claim 1 , wherein the stationary wave audio pattern includes frequency information and amplitude information of an audio signal. According to claim 1,
The switching control unit includes an image determination unit that determines whether the regular broadcasting or the regular broadcasting is progressed by comparing whether sample image data among the broadcasting data matches a regular wave image pattern. According to claim 9,
The broadcasting system of claim 1 , wherein the regular wave image pattern includes information about an image for more than one frame. According to claim 1,
The switching control unit compares whether sample audio data of the broadcasting data matches with a stereoscopic audio pattern to determine whether the stereoscopic wave is progressing, compares sample image data of the broadcasting data with a stereoscopic image pattern, and determines whether the stereoscopic wave image pattern matches. When it is determined that the progress of the regular wave is determined, the broadcasting system determines that the progress of the regular wave is finally determined. According to claim 1,
During the straight wave time during which the compression multiplexing unit outputs the data stream for the straight wave,
The broadcasting system of claim 1 , wherein the switching control unit determines that the regular broadcasting is in progress if the sample audio data among the broadcasting data is not matched with a regular wave audio pattern within a predetermined degree of similarity. According to claim 1,
The broadcasting system is operated by a first broadcasting operator, processes the high-frequency broadcasting signal from a system of the second broadcasting operator, and provides the processed signal to a user terminal. A broadcast method for switching a broadcast channel transport stream in a broadcast system,
Determining whether regular broadcasting or regular broadcasting is performed for sample broadcasting data; and
and generating control information for controlling transmission of a regular broadcast stream or a regular wave data stream according to a result of the determination.

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