WO2020125782A1 - Broadcast signal receiving device and broadcast signal receiving method - Google Patents

Abstract

Provided are a broadcast signal receiving device and a broadcast signal receiving method, capable of providing a CM that makes the relationship between the CM and viewed program content more similar. The broadcast signal receiving device of the embodiment comprises: a receiving portion for receiving and demodulating broadcast content; a replacement CM period information acquisition portion for acquiring, during a CM period in a broadcast content playback period, replacement CM period information indicating a special allocation period; a replacement CM acquisition portion for acquiring at least one replacement CM associated with the broadcast content from outside; and a CM selecting portion for playing back the replacement CM during the allocation period of the replacement CM on the basis of the replacement CM period information.

Description

Broadcast signal receiving device and broadcast signal receiving method

This application claims the priority of three Japanese patent applications filed on December 20, 2018 with application numbers 2018-238919, 2018-238920, and 2018-238921, the entire contents of which are incorporated by reference in this application.

Technical field

Embodiments of the present invention relate to a broadcast signal receiving device and a broadcast signal receiving method.

Background technique

The receiving device that can be connected to the network has a function of displaying an addressable advertisement (alternative advertisement) (the advertisement is described as CM below). This addressable advertisement displays the most consistent with the viewer's preference (actually the receiving device) Good advertising. This display replacement CM function provides a separate service for each viewer of the receiving device. It should be noted that the above-mentioned viewer's preference can actually be called an attribute of the receiving device estimated based on the viewing history of the receiving device.

Patent Literature: Japanese Special Publication No. 2002-518946

Further techniques for making replacement CM more effective are needed. For example, even if the viewer's preference is known, it can be speculated that the recommended CM should be recommended to the viewer, but if the content of the recommended CM does not match the content of the broadcast program (content), the viewer may sometimes intentionally avoid the replacement CM. For example, when there are multiple recommended CMs, it is also assumed that CMs that do not coincide with broadcast programs (contents) are distributed.

Therefore, an object of the present embodiment is to provide a broadcast signal receiving apparatus and a broadcast signal receiving method, which can provide a CM that makes the relationship between the CM and the content of the viewing program (hereinafter referred to as content) more similar (high correlation).

Summary of the invention

In a first aspect, the present application provides a broadcast signal receiving device, the broadcast signal receiving device having:

The receiving part receives demodulated broadcast content; the replacement advertisement CM period information acquisition part acquires the replacement CM period information indicating a special distribution period during the CM period during which the broadcast content is played; the replacement CM storage memory is obtained from the outside And store the replacement CM associated with the broadcast content and the viewer's preference; the CM selection unit, based on the replacement CM period information, plays the replacement CM during the distribution of the replacement CM; and The control unit monitors the remaining capacity of the CM storage memory, and stores the replacement CM with a higher priority when storing the replacement CM in the CM storage memory.

In a second aspect, the present application provides another broadcast signal receiving apparatus, the broadcast signal receiving apparatus having: a receiving section that receives and demodulates broadcast content; and a replacement CM period information acquisition section that is in the CM during the broadcast content playback period During, the replacement CM period information indicating the distribution period is acquired; the replacement CM save memory acquires and stores the replacement CM from the outside; the CM selection unit, based on the replacement CM period information, plays during the allocation period and the allocation period Corresponding to the replacement CM; the internal counter is synchronized with the timestamp of the broadcast content; the CM selection control unit controls the replacement when the value of the internal counter reaches the set value of the replacement CM period information The CM saving memory outputs the replacement CM to the decoder or controls the replacement CM saving memory to stop outputting the replacement CM to the decoder.

In a possible implementation manner, the control part monitors the remaining capacity of the replacement CM holding memory, and when the remaining capacity is less than a predetermined value, stops acquiring the replacement CM read from the external server.

In a possible implementation manner, it further includes a control part, which notifies the external server of the remaining capacity of the replacement CM storage memory.

In a possible implementation manner, it further includes a control unit, which stops acquiring the replacement CM from the external server according to the stop instruction.

In a possible implementation manner, the external server is used to determine the remaining capacity, and send the stop instruction according to the remaining capacity. That is, the stop instruction is issued by the external server based on the judgment of the remaining capacity.

In one possible implementation, the replacement CM is associated with the broadcast content and with viewer preference.

In a third aspect, the present application provides a broadcast signal receiving method, which is applied to a control unit of a broadcast signal receiving apparatus including a control unit, an internal counter, a CM selection control unit, and receiving and demodulating a broadcast The content receiving section, the method includes: during the CM period of the broadcast content playing period, acquiring replacement CM period information indicating the distribution period; acquiring the replacement CM from the outside and storing it in the replacement CM storage memory; based on The replacement CM period information, playing the replacement CM corresponding to the distribution period during the distribution period; synchronizing the internal counter with the time stamp of the broadcast content; when the value of the internal counter reaches the When replacing the set value of the CM period information, the replacement CM saving memory is controlled to output the replacement CM to the decoder or the replacement CM saving memory is controlled to stop outputting the replacement CM to the decoder.

In a possible implementation manner, the method further includes: monitoring the remaining capacity of the replacement CM storage memory; when the remaining capacity is less than a predetermined value, stopping acquiring the replacement CM read from the external server.

In a possible implementation manner, the method further includes: notifying the external server of the remaining capacity of the replacement CM storage memory.

In a possible implementation manner, the method further includes: according to the stop instruction, stopping obtaining the replacement CM from the external server.

In a possible implementation manner, the external server is used to determine the remaining capacity, and send the stop instruction according to the remaining capacity.

In one possible implementation, the replacement CM is associated with the broadcast content and with viewer preference.

According to a fourth aspect, a computer storage medium is provided. The computer readable storage medium stores instructions which, when run on a computer, cause the computer to execute the third aspect or any possible implementation manner of the third aspect. The method described in.

According to a fifth aspect, a computer storage medium is provided. The computer readable storage medium stores instructions, which when executed on a computer, causes the computer to perform the third aspect or any possible implementation manner of the third aspect. The method described in.

According to a sixth aspect, there is provided a computer program product containing instructions that store instructions, which when run on a computer, cause the computer to perform the third aspect or any possible implementation of the third aspect The method described in the method.

BRIEF DESCRIPTION

1 is a diagram showing a configuration example of a replacement CM system including a broadcast signal receiving device according to an embodiment of the present invention;

2 is a diagram schematically showing a configuration example of a broadcasting station (broadcast signal transmission device);

3 is a diagram schematically showing the configuration of a broadcast signal receiving device (unit) of the embodiment;

FIG. 4 is a diagram showing a main part of a replacement CM system including a broadcast signal receiving device of an embodiment;

FIG. 5 is a diagram showing a configuration example of some modules of FIG. 4 in further detail;

FIG. 6 is a flowchart illustrating the cooperative operation of the broadcast signal receiving device 140 of FIG. 5 and the CM distribution server 120;

7 is a sequence diagram for explaining the operation when the broadcast signal receiving device 140 of FIG. 5 presents content and recommends CM;

FIG. 8 is a sequence diagram illustrating the timing of switching the broadcast signal receiving apparatus of the present embodiment to the processing for presenting the recommended CM;

9A is a configuration in the broadcast signal receiving device of the present embodiment, and is a diagram showing an example of a switching circuit for recommending CM and positive content;

9B is a configuration in the broadcast signal receiving device of the present embodiment, and is a diagram showing another example of a switching circuit for recommending CM and positive content;

FIG. 10 is an explanatory diagram showing an example of a logic method for selecting recommended CM suitable for viewers in the system of the present embodiment.

detailed description

Hereinafter, embodiments will be described with reference to the drawings.

FIG. 1 is a diagram showing a configuration example of a replacement CM system to which an embodiment of the present invention is applied. The replacement CM system includes a broadcast station (broadcast signal transmission device) 100, a broadcast signal reception device 140, a CM distribution server 120, and a management server 121. The broadcast signal receiving device 140 is used to receive a program broadcast by a broadcast station (broadcast signal transmitting device) 100, and includes a CM replacement device 330 (described later) of an embodiment of the present invention. The broadcasting station 100 and the broadcast signal receiving device 140 are connected to the CM distribution server 120 (which may also be referred to as a CM insertion server) and the management server 121 via the network 130. In addition, the broadcast signal receiving apparatus can be connected to the collaboration server through the network 130.

The broadcasting station 100 may be a base station that schedules programs and broadcasts the scheduled programs to the broadcast signal receiving device 140 through broadcast signals. The broadcasting station 100 may also be referred to as a broadcast signal transmission device.

The broadcasting station 100 has a CM management server 101 that stores and manages the CM created by the CM company 110. The broadcasting station 100 inserts and arranges the CM (Commercial Message) stored in the CM management server 101 into a broadcast program, and broadcasts (transmits) a broadcast signal to the broadcast signal receiving device 140 as a series of video streams and audio streams. It should be noted that the CM company 110 (for example) creates a CM based on a commission from a contract-based advertiser (refers to a client who commissions the CM company 110 for advertising production, etc.) 111, and registers the created CM with the broadcast station 100. CM management server 101. That is, in one implementation, the CM company 110 creates a CM based on a commission from a contract-based advertiser 111, and registers the created CM in the CM management server 101 of the broadcasting station 100, where the advertiser 111 refers to Clients who entrust CM company 110 to make advertisements, etc.

In addition, the broadcasting station 100 has a function of connecting to the network 130, and is connected to the CM distribution server 120 and the management server 121 through the network 130.

The CM distribution server 120 is a server that stores the replacement CM transmitted from the CM management server 101 connected through the network 130 and distributes the stored replacement CM in accordance with a request from the broadcast signal receiving device 140. The replacement CM is sometimes sent from the CM company 110. That is, the CM distribution server 120 stores the replacement CM sent by the CM management server 101 and distributes the stored replacement CM according to a request from the broadcast signal receiving device 140, wherein the CM distribution server 120 manages with the CM through the network 130 The server 101 is connected; in a feasible implementation manner, the replacement CM may also be sent by the CM company 110.

The management server 121 is a server for providing additional services associated with the program received by the broadcast signal receiving device 140. That is, the management server 121 is used to provide additional services associated with the program received by the broadcast signal receiving device 140. The additional service provided by the management server 121 is, for example, a service for the broadcast signal receiving device 140 to replace a CM inserted in the middle of a program with a replacement CM and provide it to a user who is watching a certain program. That is, providing an additional service means providing the broadcast signal receiving device 140 with a CM period that can be replaced with a replacement CM. The CM time period that can be replaced with the replacement CM provided by the management server 121 to the broadcast signal receiving device 140 is based on the replacement CM period information transmitted from the CM management server 101 of the broadcasting station 100. That is, the CM time period that can be replaced with the replacement CM can be determined based on the replacement CM period information sent from the CM management server 101. It should be noted that the replacement CM period information may be transmitted together with the broadcast signal, but may also be transmitted through the management server 121 and/or the CM distribution server 120.

In addition, the management server 121 has a function of collecting the viewing history of the broadcast signal receiving device 140. The broadcast signal receiving device 140 replaces the CM inserted in the middle of the program with a replacement CM, and transmits it in the viewing history. That is, the broadcast signal receiving device 140 may record the actual situation in which the CM inserted in the middle of the program is replaced with a replacement CM in the viewing history, and send it to the management server 121.

The broadcast signal receiving device 140 is a receiving device that receives a program broadcasted by a broadcast signal from the broadcasting station 100. In addition, the broadcast signal receiving device 140 has a function of connecting to the network 130 and is connected to the CM distribution server 120 through the network 130. The broadcast signal receiving device 140 saves the replacement CM distributed from the CM distribution server 120 in the managed recording medium 160 (including the CM storage memory).

In addition, in order to receive additional services related to broadcast programs, the broadcast signal receiving device 140 can set a connection with the management server 121 through the (for example) function setting screen of the broadcast signal receiving device 140. The broadcast signal receiving device 140 (for example) can use the information required for connection with the management server 121, such as the unique information of the broadcast signal receiving device 140 (also referred to as device ID), by using the user to operate the function setting screen. The family status of the user of the signal receiving device 140 (sex and age of the person constituting the family) and the like are registered in the management server 121. Thereby, the management server 121 can uniquely identify each broadcast signal receiving device 140 by, for example, the device ID of the broadcast signal receiving device 140.

Thereby, the broadcast signal receiving device 140 registers information necessary for connection with the management server 121 through the function setting screen, and thus can receive various additional services related to the program received by the broadcast signal from the management server 121.

In addition, the broadcast signal receiving device 140 includes the CM replacement device of this embodiment. The broadcast signal receiving device 140 has a function of selecting the best replacement CM from the replacement CM stored in the recording medium 160 by the CM replacement device and displaying it on the display screen. At this time, the broadcast signal receiving device 140 displays the selected best replacement CM in accordance with the time period in which the replacement CM sent from the management server 121 can be replaced, and can be adaptively provided to the viewer watching the program.

It should be noted that the example of FIG. 1 is only a case where there is only one broadcast signal receiving device 140, but it is not limited to one. When there are a plurality of broadcast signal receiving apparatuses 140, each broadcast signal receiving apparatus 140 is managed by the management server 121 by the device ID that each has.

FIG. 2 is a diagram schematically showing a configuration example of a broadcasting station (broadcast signal transmission device) 100. The broadcasting station (broadcast signal transmission device) 100 encodes (also referred to as encode) video data, audio data, and the like of programs inserted and arranged in the CM stored in the CM management server 101 and transmits them as broadcast signals.

The data broadcast encoder 210 has a function of encoding the data broadcast data associated with the scheduled program. The data broadcast encoder 210 encodes data for data broadcast.

The video encoder 211 has a function of encoding the video data of the scheduled program. The video encoder 211 encodes the video data of the scheduled program.

The audio encoder 212 has a function of encoding the audio data of the scheduled program. The audio encoder 212 encodes the audio data of the scheduled program.

The subtitle encoder 213 has a function of encoding subtitle data of the scheduled program. The subtitle encoder 213 encodes the subtitle data of the programmed program.

The control information generating unit 214 has a function of generating TLV packets and control information of MMT. The control information of the TLV packet refers to control information related to the multiplexing of the IP packet (also referred to as TLV-SI), and provides information for channel selection, correspondence information of the IP address and the service. The MMT control information refers to control information related to the configuration of the MMT plug-in and the broadcast service (also called MMT-SI). The control information generating unit 214 generates a signal including a TLV packet of control information and control information of MMT related to the program to be encoded by the audio encoder 212 and the video encoder 211.

The scrambler 215 has a function of cooperating with the CAS module 216 to scramble the encoded audio data output from the audio encoder 212 and the encoded video data output from the video encoder 211.

The CAS module 216 is a module that generates a key used when the scrambler 215 scrambles.

The multiplexer 217 has the following functions: a data broadcast stream generated by encoding the data broadcast encoder 210, a video stream generated by encoding the video data by the video encoder 211, and audio data encoded by the audio encoder 212 The generated audio stream, the subtitle stream generated by encoding the subtitle data by the subtitle encoder 213, and the control information generated by the control information generation unit 214 are multiplexed in the MMT/TLV method. The multiplexer 217 generates a TLV stream that multiplexes the audio stream, video stream, TLV packet, and MMT control information.

The transmission unit 218 has a function of transmitting a broadcast signal composed of a TLV stream as a broadcast wave. The transmission unit 218 performs transmission path coding processing such as 16APSK modulation and error correction coding on the TLV stream generated by the multiplexer 217 and transmits it as a broadcast wave.

FIG. 3 is a diagram schematically showing the configuration of a broadcast signal receiving device (unit) 140 using an embodiment of the present invention. The broadcast signal receiving device 140 includes a basic function 341 as a receiving function for receiving broadcast signals and a control unit 342.

Basic functions 341 include: broadcast tuner 301, demultiplexer 302, descrambler 303, CAS module 304, data broadcast engine 305, video decoder 306, audio decoder 307, subtitle decoder 308, control information analysis unit 309 , GUI 320, and synthesizer 326.

The tuner 301 has a function of receiving a broadcast signal (TLV stream) transmitted by the broadcast signal. The broadcast signal received by the tuner 301 is input to the demultiplexer 302.

The demultiplexer 302 has a function of separating the multiplexed TLV stream into a data broadcast stream, a video stream, an audio stream, a subtitle stream, and control information. The demultiplexer 302 inputs the separated data broadcast stream, video stream, audio stream, data broadcast stream, and subtitle stream to the descrambler 303, and inputs the control information SI signal to the control information analysis unit 309.

The descrambler 303 has the following function: cooperates with the CAS module 304 to descramble the input data broadcast stream, video stream, audio stream, and subtitle stream. The descrambler 303 inputs the descrambled data broadcast stream to the data broadcast engine 305, the video stream to the video decoder 306, the audio stream to the audio decoder 307, and the subtitle stream to the subtitle decoder 308.

The CAS module 304 has a function of generating a key used for descrambling by the descrambler 303.

The data broadcast engine 305 has a function of receiving the input data broadcast stream. The data broadcast engine 305 converts the received data broadcast stream into display data and sends it to the synthesizer 326. The data broadcast data transmitted to the synthesizer 326 is synthesized with video data and the like and displayed on the display unit 350.

The video decoder 306 has a function of decoding (Decode) the input video stream. The video decoder 306 decodes the video stream and generates a signal to be displayed on the display unit 350.

The audio decoder 307 has a function of decoding the input audio stream. The audio decoder 307 decodes the audio stream and generates a signal output to the speaker 351. The subtitle decoder 308 decodes the subtitle stream and generates a signal to be displayed on the display unit 350.

The decoded video signal, subtitle signal, and data broadcast signal are synthesized by the synthesizer 326 and output to the display unit 350. In addition, the decoded audio signal is output to the speaker 351.

The control information analysis unit 309 analyzes the SI signal which is control information of the broadcast signal. If the control information analysis unit 309 analyzes the SI signal, the analysis result is sent to the control unit 342.

The control unit 342 controls the overall operation of the broadcast signal receiving device 140. In addition, the control unit 342 keeps the CM replacement device 330 of the embodiment of the present invention inside and controls it. In addition, the control unit 342 also controls the network I/F 331 that is the I/F to the network 130 and the external input I/F 332 that is the connection I/F to the external device.

In addition, the control unit 342 performs the following control: selects the best replacement CM most suitable for the viewer of the broadcast signal receiving device 140 from the replacement CM stored in the recording medium 160 according to the replacement control signal output by the CM replacement device 330, and The CM of the time period that can be replaced with the replacement CM received from the management server 121 is replaced and displayed as the selected replacement CM.

FIG. 4 is a diagram omitting the network system in the configuration of FIG. 1 and simplifying the configuration example of the replacement CM system.

The broadcasting device 100 transmits the broadcast content, the content ID, and the CM presentation timing (CM period information) to the broadcast signal receiving device (television receiver) 140. Here, the content ID is an ID that uniquely identifies the broadcast content, and the CM presentation timing is a signal indicating the presentation time of the CM included in the broadcast content (also a signal indicating a time period in which the replacement CM can be inserted). For example, the CM period information may be sent via the management server 121 (through the network transceiving device 121-4 of the management server 121). Here, the CM period information does not determine that the replacement CM is actually inserted, and the broadcast signal receiving device 140 sometimes prompts (displays) the default CM included in the broadcast signal.

The broadcast signal reception device 140 transmits the content ID and the reception device ID of the broadcast signal reception device 140 itself to the CM distribution server 120. The receiving device ID is an ID that uniquely identifies the broadcast signal receiving device 140. Therefore, the server 120 for CM distribution (for example, under the control of the system control unit 120-4) can also make a CM transmission request to the broadcast signal receiving device 140 based on the current receiving device ID.

The CM distribution server 120 transmits the CM information (recommended CM or replacement CM) generated based on the content ID and the receiving device ID to the broadcast signal receiving device 140. The recommended CM refers to the CM presented to the viewer when the viewer of the receiving device having the receiving device ID watches the program (content) corresponding to the content ID. The server 120 for CM distribution can acquire alternative CM period information that can be used independently from the broadcasting apparatus 100.

First, if the broadcast signal receiving device 140 starts receiving content (program), the recommended CM suitable for the content is preloaded and stored in the memory. The recommended CM (replacement CM) temporarily stored in the memory is replaced with the original CM (CM allowed to replace the original CM time period) in the content (program) currently being received. That is, the recommended CM (replacement CM) temporarily stored in the memory may be used to replace the original CM in the content (program) currently being received, where the original CM may be the CM within the time period allowed to be replaced.

There may be various methods of associating the viewer with the CM who wants to be presented to the viewer. For example, the program type, performer, viewing time, etc. watched by viewer A are stored as viewing logs, and the preference of viewer A is determined by analyzing the viewing log data. If the preference of viewer A is understood, it can be presumed that it may be suitable for the CM of viewer A. Based on the estimated information, the attribute information of the CM can be set. Therefore, the recommended CM estimated to be suitable for viewer A is not limited to one. Sometimes there are multiple. In this case, a priority order may be added to the recommended CM.

Here, the broadcast signal receiving device 140 always sends viewing log data (for example, via the network transceiver 121-4 of the management server 121) to the viewing log database 121a, and the viewing log database 121a stores the viewing log of the broadcast signal receiving device 140. When the CM recommendation device 121b determines the attribute of the CM, it refers to the viewing log output from the viewing log database 121a. CM attributes (for example) indicate the type of CM target product, CM performer, etc., and can be flexibly set by a business model. For example, in the viewing log database 121a, when the viewing history is a sports program, the viewer has a preference for sports. In this case, attributes such as the CM of sportswear, the CM of a baseball, or a football field can be associated with the program (content).

As described above, in the broadcast signal receiving device 140, a part of the plurality of default CMs included in the positive film is replaced with the recommended CM during the CM replacement permission period.

Here, there may be a case where the replacement with the recommended CM cannot be performed due to the delay of the preload timing or the switching of the channel. That is, in some cases, due to the delay of the preloading timing or the switching of the channel, CM replacement cannot be achieved. In addition, sponsors who recommend CM also want to know the viewing status of the recommended CM.

Therefore, the broadcast signal receiving apparatus 140 reports to the CM presentation result management apparatus 121c whether the presentation of the CM acquired from the CM distribution server 120 succeeds or fails.

In addition, the broadcast signal receiving device 140 outputs the related information of the content ID and the receiving device ID to the CM distribution server 120 in advance. Thereby, the CM distribution server 120 can construct the receiving device and the content, and the relevant information of the corresponding CM.

The above description describes an example. It has been described that the broadcast signal receiving device 140 transmits to the CM distribution server 120 the content ID and the receiving device ID of the content to start reception. This is to perform pre-loading quickly. There may be no time delay between the CM recommendation device 121b and the CM distribution server 120. In this case, the content ID and the receiving device ID may be transmitted to the CM distribution server 120 via the CM recommendation device 121b. That is, there may be no time delay between the CM recommendation device 121b and the CM distribution server 120 (or when the time extension is not considered), the content ID and the receiving device ID may also be sent to the CM through the CM recommendation device 121b Publish server 120.

FIG. 5 shows the alternative CM system of this embodiment in further detail.

The broadcast signal receiving device 140 receives and demodulates a broadcast signal through a broadcast receiving section 301-4 (including a tuner, etc.), and outputs a broadcast stream to the selection section 330a. The management unit 342b that has received the device ID and the viewing content ID transmits the received content ID and receiving device ID to the server 120 for CM distribution. In addition, the CM selection control unit 330d controls the selection unit 330a.

The network transceiver 331 receives the recommended CM (may also be referred to as a replacement CM) sent by the CM distribution server 120 and outputs it to the selection unit 330a. The selection unit 330a stores (preloads) the recommended CM in the CM storage memory 330b based on the control signal from the CM selection control unit 330d.

The CM selection control unit 330d controls the CM holding memory 330b, the switch SW, and the FIFO unit (first-in first-out memory). The CM selection control section 330d extracts CM period information including the CM replacement permission period from the service data of the demodulated broadcast signal. On the other hand, the CM period information including the CM replacement permission period may be sent simultaneously with each program, or may be sent together with the program list in advance. The CM period information including the CM replacement permission period may basically be sent from the management server 121 or may be sent from the CM insertion server 120.

The CM selection control unit 330d stores the CM period information, and if the CM replacement timing is approaching, the process of writing the replacement CM content into the FIFO unit 330e is also performed through the switch 330c. That is, in the FIFO unit 330e, the broadcast stream and the recommended CM stream are switched according to the CM switching timing. In addition, the CM selection control unit 330d reads the recommended CM stream from the FIFO unit 330e during the replacement period and decodes it in the decoder 315. The signal output from the FIFO unit 330e is presented to the display device 350 such as a liquid crystal panel via the decoder 315 and the drawing unit 316.

It should be noted that in the above description, it is explained that the broadcast signal receiving device 140 reads the CM period information including the CM replacement permission period together with the broadcast signal, but it may also be stored in advance for CM distribution for multiple contents In the server (CM insertion server) 120, the CM period information including the CM replacement permission period can be stored in the CM distribution server in advance. In addition, when the CM distribution server 120 receives the content ID started by the broadcast signal receiving device 140, the CM distribution server 120 transmits CM period information including the CM replacement permission period to the corresponding broadcast signal reception device.

On the other hand, the system control device 342 performs control of the CM save memory 330b and collection control of the viewing logs (viewing log collection unit 342a), that is, the system control device 342 controls the CM save memory 330b and the viewing log collection unit 342a for viewing Control the collection of logs. The viewing log is sent to the external viewing log database 121a. The viewing log collection unit 342a can generate the judgment material for identifying the replacement CM based on the data of the viewing log of the broadcast content viewed. In addition, the user can specify the attribute information of the replacement CM that needs to be intentionally avoided here. It should be noted that the viewing log collection unit 342a may be provided in an external server (management server 121).

The system control device 342 performs overall operation control of the broadcast signal receiving device in accordance with the operation instruction of the external remote controller 360.

The broadcasting device 100 has a content database inside, that is, the content database is set inside the broadcasting device 100. In this embodiment, content A, content B, and content C are shown as an example. The broadcasting device 100 selects any one of these contents by the selection unit 131, encodes by the encoder 132, multiplexes the CM timing information (CM period information) by the CM timing information multiplexing unit 134, and generates a transmission processing unit by broadcast signal generation 135 is transmitted as a broadcast signal (transmitted by the broadcast signal generation and transmission processing unit 135 in the form of a broadcast signal).

The management server 121 includes a system control unit 121-5, and the basic operation operates according to the commands of the control unit, that is, the management server 121 is controlled by the system control unit 121-5 through commands or realizes its functions through the system control unit 121-5 . The management server 121 has a viewing log database 121a and a CM presentation result management device 121c. The CM recommendation device 121b in the management server 121 includes an ID management unit 121-1 of a broadcast signal receiving device and a viewing tendency analysis unit 121-2. In addition, when estimating the viewing tendency of each broadcast signal receiving device, the attribute information of the recommended CM (information including genre, performer, producer preference, etc., and a combination of these) is generated (121-3).

There is not only one recommended CM corresponding to one broadcast signal receiving device, but sometimes there may be multiple. In this case, priority is given to attribute information of a plurality of recommended CMs. The priority order is given in the order of viewing times, viewing times of similar content, and so on. In addition, multiple recommended CMs set an upper limit on the number. That is, the priority order of a plurality of recommended CMs may be given through the attribute information, and the priority order may be sorted according to the number of times of viewing, the number of times of viewing similar content, and so on.

In this way, after comparing the receiving device ID, the viewing content ID, etc. transmitted from the broadcast signal receiving device 140 with the internal database or referring to it, the viewing tendency (favorability) of the viewer (broadcast signal receiving device) is determined. Next, attribute information (for example, genre, etc.) of the recommended CM that is analogized and determined based on the viewing tendency (favorability) is calculated (generated), and is output to the CM distribution server 120 together with the receiving device ID, content ID, and the like. It should be noted that the viewing tendency database (viewer preference database) uses the viewing logs of each receiving device stored in the viewing log database to calculate the viewing tendency of each receiving device.

In the CM distribution server 120, a predetermined CM is selected in advance based on the content ID transmitted from the broadcast signal receiving device 140 and the recommended CM attribute corresponding to the content ID obtained from the CM recommendation device 121b. In this embodiment, the CM corresponding to content A and CMa1, CMa2, CMa3, the CM corresponding to content B and CMb1, CMb2, CMb3, and the CM corresponding to content C are associated with CMc1, CMc2, CMc3. These associations are associated with the content IDs sent from the broadcast signal receiving device 140, that is, these associations can be implemented in correspondence with the content IDs sent from the broadcast signal receiving device 140. For example, when the ID of the content A is transmitted from the broadcast signal receiving device 140, by selecting the CM corresponding to the content A from CMa1, CMa2, and CMa3, the CM that should be issued to the broadcast signal receiving device 140 is determined.

That is, the CM selection unit 120-1 selects a predetermined CM based on the content ID and the CM attribute, and transmits it to the broadcast signal receiving device 140 via the encoder 120-2 and the network transceiver 102-3.

Next, the operation of each part will be further described with reference to FIGS. 6, 7, 8, 9A, 9B, and 10.

FIG. 6 is a flowchart showing the relationship between the broadcast signal receiving device 140 and the CM distribution server 120. First, in the broadcast signal receiving apparatus 140, the size of the CM storage memory 330b (which may be the current remaining capacity) is calculated (SA1). Next, the broadcast signal receiving device ID and the received content ID are sent to the CM distribution server 120 (SA2), and a plurality of desired recommended CMs are received and stored (SA3). At the time of saving, the size of the recommended CM is acquired, and a plurality of recommended CMs corresponding to the size of the storage memory 330b of the recommended CM calculated in advance are acquired. In addition, during storage, the number of CMs is counted (SA3).

As shown in SB1 and SB2, the server 120 for CM distribution transmits the recommended CM suitable for the broadcast signal receiving device and the content being received to the broadcast signal receiving device 140 in response to a request from the broadcast signal receiving device 140.

The broadcast signal receiving device 140 checks whether there is content switching (SA4). If there is a handover, return to SA1. In this case, the CM storage memory 330b (SA5) may be cleared, but a part of the recommended CM may also be retained.

When there is no content switching, it is monitored whether it is time to present the recommended CM (SA6). If the recommended time for the recommended CM is before the recommended time for the recommended CM, return to SA4. If it is time to prompt the recommended CM, it will play and prompt the recommended CM with higher priority (SA7). Next, it is checked whether the number of recommended CMs stored in the CM storage memory 330b is "0" (SA8). When the number of stored recommended CMs is "0", the CM replacement function ends (SA9). When the stored recommended CM remains, return to SA4 and wait until the time of the next CM period.

The broadcast signal receiving device 140 transmits the actual situation of the CM presentation result to the management server 121 (SA10). The transmission content may be, for example, prompting all recommended CMs, or recommending CMs in the order of priority, or failing to prompt (the failure to prompt a full period of CMs), and so on.

7 is a sequence diagram showing the operation of the viewer AU, the operation of the broadcast signal receiving device 140, the operation of the CM distribution server 120, and the like. At the timing (time) when the viewer performs channel switching AU1, the broadcast signal receiving device 140 prompts the broadcast content of the selected broadcast station. In parallel, the broadcast signal receiving device 140 transmits the receiving device ID and the content ID to the CM distribution server 120, and starts preloading of the CM. In parallel, the viewer watches the main content of the broadcast content (AU2). The pre-loaded CM is stored in the CM storage memory 330b, and is switched from the broadcast content presentation time dt1 to the CM stored in the CM storage memory 330b according to the CM start control time dt2 sent by the broadcasting apparatus 100, and a prompt to replace the CM is implemented. In parallel, the viewer performs CM viewing (AU3). Thereby, it becomes the state of CM presentation time dt3. In addition, according to the CM end control time dt4, the presentation of the CM from the CM storage memory 330b is ended, and by returning to the presentation time dt5 of the broadcast content, the replacement CM operation is completed. In parallel, the viewer watches the main content of the broadcast content (AU4).

At the CM end control time dt4, the CM presentation result management device 121c is notified of the CM presentation result according to the operation described in FIG. 6. When the notification ends (CM presentation result notification time dt6), the broadcast signal receiving device 140 prepares the next CM presentation (preparation time dt7 for the next CN presentation), and sets the next presentation with a higher priority from the CM storage memory 330b Replacement of CM.

8 is a diagram for explaining CM start control and CM end control for controlling the presentation timing of CM. The broadcasting device 100 transmits the time stamp of the broadcast content included in the broadcast signal. In addition, the broadcasting apparatus 100 transmits the information indicated by the relative time from the start time of the content at the presentation timing of the CM based on the time stamp.

The broadcast signal receiving apparatus 140 synchronizes the internal counter with the time stamp from the broadcast apparatus 100, where the internal counter may also be referred to as an internal timer, and may be used to achieve time stamp synchronization. Then, the internal counter is counted, and when the relative time is reached as the presentation timing of the CM (video switching time point dt), a switching timing signal is generated. This timing (time) corresponds to the CM start control time dt2 of the switching of the video in FIG. 7. In this operation, since time synchronization of the internal counter of the broadcast signal receiving device 140 and the time stamp of the broadcast device 100 is performed, it is possible to perform switching with high accuracy. Through the same action, the CM end control time dt4 is also realized, that is, in a similar manner, the CM end control time dt4 can also be determined, and a corresponding signal is generated.

The switching action can be determined (whether or not to perform) by comparing the image switching time point dt with the value contained in the replacement CM period information. Thus, it is possible to arbitrarily control whether to output the default CM included in the positive film or to output the replacement CM.

9A and 9B show an example of a circuit module that realizes the switching between the main content of the content and the replacement CM. In the embodiment of FIG. 9A, the broadcast signal is decoded by the path of the switch 330c, the FIFO section 330e, and the decoder 315 during a period other than the replacement CM period. Since the switching control of the switch 330e is performed, during the replacement of the CM, the CM selection control section 330d performs control so that the CM content read from the CM storage memory 330b is written into the FIFO section 330e and read out. Conversely (as opposed to this), during a period other than the replacement CM period, the CM selection control section 330d performs control so that the broadcast content included in the broadcast signal is written into the FIFO section 330e and read out. The control unit 342 controls the start of the operation of the FIFO unit 330e and the decoding operation of the decoder 315. The CM selection control unit 330d controls the switch SW based on the CM start control information and the CM end control information. The CM start control information and the CM end control information are information read out from the replacement CM period information in chronological order.

In the embodiment of FIG. 9A, the same decoder 315 performs the decoding of the positive film of the replacement CM and the broadcast content. In contrast, as the decoders 315A and 315B, the embodiment of FIG. 9B prepares a decoder that decodes the broadcast content and the replacement CM. The decoders 315A and 315B operate in frame synchronization.

The decoder 315A sequentially decodes the broadcast content. Therefore, the default CM included in the broadcast content is also decoded and output. On the other hand, the decoder 315B decodes the content of the replacement CM read from the CM storage memory 330b.

In this case, for example, the CM selection control unit 330d may decode the replacement CM one frame or several frames in advance, and loop through the frame memory (not shown). Moreover, the switch 330g can be controlled based on the CM start control information and the CM end control information to realize CM replacement.

For example, FIG. 10 shows a case where a preferred CM is assigned to content in the CM distribution server 120. In the content A, the CMa1, CMa2, and CMa3 of the CM are associated, and in the content B, the CMb1, CMb2, and CMb3 of the CM are associated. Here, CMa1 is attribute 1 (sports), CMa2 is attribute 2 (vehicle), and CMa3 is attribute 3 (clothing). In addition, attribute 1 (sports) is subdivided and associated with attribute 11 (golf), attribute 12 (baseball), and attribute 13 (football). In addition, attribute 2 (vehicle) is also subdivided and associated with attribute 21 (car), attribute 22 (bicycle), and attribute 23 (railway). In addition, attribute 3 (clothing) is also subdivided and associated with attribute 31 (adult male), attribute 32 (adult female), and attribute 33 (child). Similarly, the attributes in CMb1, CMb2, and CMb3 of content B are also related.

For example, the CM associated with content A is associated with the CM associated with content that becomes a topic in content A. In the case of content A, for example, there is the following story: an appearance character X who likes sports uses a luxury car to chase a player Y to the stadium. In addition, there is a scene where the character X presents various clothes to the player Y.

In this case, for example, the viewer AU receives the content A and starts watching. In addition, based on information such as the viewing log associated with the viewer AU, it is determined that the attribute of the receiving device of the viewer AU recommends the attribute 13, that is, based on the information such as the viewing log associated with the viewer AU, it corresponds to the viewer AU The receiving device recommends attribute 13. As a result, in the CM distribution server 120, the content ID (corresponding to content A) to be watched from the receiving device of the viewer AU and the replacement CM corresponding to the attribute 13 to the receiving device of the viewer AU when transmitting and receiving the device ID Sending, that is, sending the content ID and the receiving device ID and the replacement CM corresponding to the attribute 13 to the receiving device corresponding to the viewer AU. The above-mentioned case is a CM related to football, for example, CM used for football clothing, shoes, balls, football fields, etc. As described above, the replacement CM associated with the broadcast content is selected from the viewer's preference based on the analysis result of the viewing history of the broadcast content and the CM that has similarity to the preference (which may be high similarity or close distance) Determine, that is, determine the substitution associated with the broadcast content from the viewer's preference based on the analysis result of the viewing history of the broadcast content, and the CM that has similarity (may be high similarity or close distance) to the preference CM.

Next, a plurality of viewpoints included in the above embodiment will be described below. That is, as shown in FIG. 5, for example, <viewpoint A> (A1) is characterized by including: a receiving unit 301-4, which receives and demodulates broadcast content; and a viewing log collection unit 342a, which generates a viewing of the broadcast content. History record; the replacement CM period information acquisition unit, during the CM period in which the broadcast content is played, acquires the replacement CM period information indicating a special distribution period; the CM save memory 330b, acquires the replacement associated with the broadcast content from the outside CM; and switch 330c, based on the replacement CM period information, the replacement CM is selected for playback during the special allocation period, the replacement CM uses the viewing history, based on the viewing tendency and the attributes of the CM Priority is given to the similarity, that is, the replacement CM is determined based on the viewing history, and the priority of the replacement CM is given based on the similarity between the viewing tendency and the attributes of the CM.

According to the above viewpoint A1, an effective and efficient presentation of addressable CM is realized. In order to realize the above-mentioned prompt, the analysis result of the viewing log output from the broadcast signal receiving device can be used to analyze the viewing tendency of each broadcast signal receiving device, and the CM of the broadcast signal receiving device can be selected and provided. That is, by performing the distance calculation (analysis of similarity) between the viewing tendency analyzed and the attribute information of the CM, advertisement presentation with high priority is implemented. In addition, the similarity (similarity) between the attribute information of the CM and the attributes of the broadcast content (positive film) is judged, and the replacement CM is presented to each receiving device, so it is possible to provide a replacement CM more suitable for the viewer (for example, refer to FIG. 10) .

In this way, the broadcast content (positive film) can be associated with the CM that can be presented, that is, the actually played CM can be associated with the broadcast content (positive film). In addition, since the CM that should be presented is recommended among the CMs associated with the positive content, Therefore, the provider of CM can easily reflect the intention of advertisement, that is, the provider of CM can easily reflect the intention of advertisement. In addition, the distance between the attribute information of the CM and the attribute information on the viewer's side calculated based on the viewing tendency based on the viewing log is calculated (similarity determination), and based on the similarity, CM replacement, addition, deletion, etc. can be flexibly handled .

In addition, the replacement timing of CM can be selected. That is, the timing of the next replacement CM can also be set according to the scene of the broadcast content. For example, when the content of the scene is the content of tasting luxury cuisine in the restaurant, the replacement CM of the restaurant in the street where the viewer is located can be inserted. However (further), when knowing favorite dishes and disliked foods based on questionnaires obtained from viewers, etc., it is possible to provide alternative CMs for restaurants serving favorite foods.

In (A2) the above viewpoint (A1), the CM period information acquisition section acquires the replacement CM period information from an external server.

(A3) In the above viewpoint (A1), the replacement CM acquisition unit acquires a plurality of replacement CMs to which playback priority is given.

(A4) In the above-mentioned viewpoint (A1), the preference of the viewer of the replacement CM associated with the broadcast content from the analysis result based on the viewing history of the broadcast content, and the similarity to the preference Determined in the CM, that is, determined from the CM of the viewer based on the analysis result of the viewing history of the broadcast content, and the CM that has similarity (may be high similarity or close distance) to the preference, and is associated with the broadcast content Replacement of CM.

(A5) In the above viewpoint (A1), the replacement CM associated with the broadcast content is based on the viewer's preference from the analysis result based on the viewing history of the broadcast content, and has the preference associated with the preference Determined in the CM of the attribute, that is, determined from the CM of the viewer's preference based on the analysis result of the viewing history of the broadcast content and the attributes (which may be high similarity or close distance) associated with the preference The replacement CM associated with the broadcast content.

<Viewpoint B> (B1) In the above view (A1), for example, as shown in FIGS. 5, 7, and 8, the control switch 330c is controlled by the CM selection control section 330d to select either the replacement CM or the positive film . The CM selection control unit 330d operates based on the replacement CM period information. Thus, the switch 330c selects the replacement CM for playback during the special distribution period.

In this case, the internal counter of the broadcast signal receiving device 140 is synchronized with the relative time stamp (relative time information) transmitted along with the broadcast content. Also, in this viewpoint B1, the CM selection control unit 330d is a device or method that starts the prompt of the replacement CM when the value of the internal counter reaches the replacement CM start time of the replacement CM period information, and the internal counter When the value of the replacement CM period information reaches the end time of the replacement CM, the prompt of the replacement CM ends. That is, when the value of the internal counter reaches the start time of the replacement CM of the replacement CM period information, it prompts to start replacing the CM; When the value of the internal counter reaches the replacement CM end time of the replacement CM period information, it is prompted to end the replacement CM.

When switching from the broadcast content of the feature film to the advertisement, a method of receiving a moving image from the server and presenting it may be considered, but the image becomes discontinuous during the switching and significantly deteriorates.

However, according to the above viewpoint (B1), by temporarily storing the advertisement in the broadcast signal receiving device in the CM storage memory 330b for acquiring the replacement CM, it is possible to smoothly switch between (between) the program content and the advertisement acquired from the server . By cooperating with the switching timing of advertisements, a prompt is given from the internal memory of the receiver, so that the continuity of the moving image is not significantly deteriorated. The switching timing also uses an internal counter synchronized by the broadcast transmission side and the receiver side implemented by the existing digital broadcasting, so the accuracy of the switching timing can be improved.

(B2) In the above viewpoint (B1), there is provided a means for notifying the external server whether the result presented by the CM is successful after the replacement CM end time of the replacement CM period information is reached.

(B3) In the above viewpoint (B1), before and during pre-load replacement CM, the management server 121 or the CM distribution (insert) server 120 is notified of the capacity of the CM storage memory 330b. This notification may be performed by the CM selection control unit 330d, or may be performed by the system control unit 342.

Therefore, when the remaining capacity of the CM saving memory 330b is small, that is, when the number of CMs preloaded from the server 120 is large or the amount of data is large, the CM selection control section 330d or the system control section 342 may stop (suspend) the preloading .

Alternatively, the management server 121 or the CM release (insert) server 120 may be notified (to) the management server 121 or the CM release (insert) server 120 one by one by the CM selection control unit 330d or the system control unit 342, and the management server 121 or the CM release (insert) server 120 may determine Stop of preload (abort). This is effective when many replacement CMs are prepared in the replacement CM distribution server 120.

<Viewpoint C> (C1) In the aforementioned viewpoint B1, the replacement CM period information acquisition unit acquires the replacement CM associated with the broadcast content from outside, but before this acquisition, the network transmission and reception unit 331 stores the CM in memory The current remaining capacity of 330b is sent to the server 120 for CM distribution. The server 120 for CM distribution is a device or method that, when there are multiple replacement CMs that should be presented to the broadcast signal receiving device 140, the content of the replacement CM that matches the current remaining capacity is transmitted in order of priority from highest to bottom Give broadcast signal receiving device 140.

This can be achieved even from the viewpoint of the broadcast signal receiving device 140. That is, the broadcast signal receiving device 140 includes: a receiving unit that receives and demodulates broadcast content; and a replacement CM period information acquisition unit that acquires a replacement CM period indicating a special allocation period during the CM period during the period of playing the broadcast content Information; and a replacement CM storage memory, which externally obtains and stores a replacement CM associated with the broadcast content and associated with viewer preference. There is also a CM selection unit that plays the replacement CM during the allocation period of the replacement CM based on the replacement CM period information. In addition, a control unit is provided. The control unit monitors the remaining capacity of the CM storage memory before acquiring the replacement CM, and when storing the replacement CM in the CM storage memory, the storage priority is high. The replacement CM.

Normally, when storing a plurality of CMs as moving image content, a large-capacity memory is required. However, in this method, a small-capacity memory can be used by preloading the server when switching channels. In addition, by measuring the size of the storage memory on the side of the broadcast signal receiving device in advance, it is possible to flexibly set the number of stored advertisements and easily realize it.

On the other hand, if the preloading fails, the presentation of the advertisement acquired by the server fails, but at this time, the advertisement that originally inserted the broadcast content is presented (played) so that the image quality of the viewer does not deteriorate. In addition, the sending side receives the notification of the success or failure of the advertisement, so it is easy to build a business model. Although this method is such a best-effort method, the dynamic image will not be degraded and will not be harmful to the viewer.

It should be noted that the priority of replacing the CM can also be given according to the intention of the CM company and the CM provider. For example, it is possible to prioritize the CM that the viewer of a specific program wants to watch. In addition, the priority can also be adjusted according to the season.

(C2) In the above viewpoint C1, when the current remaining capacity of the CM saving memory 330b is a capacity that cannot be stored even if the contents of one replacement CM, the broadcast signal receiving device is notified that the replacement CM cannot be transmitted, that is, the remaining of the CM saving memory 330b When the storage capacity is insufficient to store the content of a replacement CM, the broadcast signal receiving device may be notified not to send the replacement CM. In this case, the broadcast signal receiving device 140 plays the default CM transmitted together with the broadcast signal without performing the CM replacement process.

(C3) That is, by notifying the external server of the remaining capacity of the CM storage memory, the external server transmits information related to the process of replacing the CM, and the receiving side operates based on the information related to the process. For example, only the replacement CM with high priority is stored, or the default CM included in the broadcast signal is played without storing the replacement CM.

It should be noted that, in the configuration example of the addressable advertisement system shown in FIG. 1, the following case has been described as an example: the broadcast station (broadcast signal transmission device) 100 transmits a broadcast wave multiplexed by the MMT/TLV method 1. The broadcast signal receiving device 140 receives the broadcast wave multiplexed by the MMT/TLV method, but it may be a case where the broadcast wave is multiplexed by the MPEG-2 method. Or in the configuration example of the addressable advertisement system shown in FIG. 1, the broadcasting station (broadcast signal transmission device) 100 may distribute the program content to the broadcast signal reception device 140 via the network 130. That is, the broadcast content described in the present invention may be a broadcast content transmitted by network TV broadcast (IP broadcast) in addition to the ground wave and the satellite wave.

In addition, the configuration example of the addressable advertisement system shown in FIG. 1 is an example in which only one broadcast signal receiving device 140 is included, but it may include a plurality. In this case, the management server 121 can identify and manage a plurality of broadcast signal receiving devices 140 by using the device ID of each broadcast signal receiving device 140.

In addition, the CM replacement device 330 that has described the embodiment of the present invention is included (installed) in the broadcast signal receiving device 140, but may also be included (installed) in the communication with the broadcast signal receiving device 140 and each device can be identified by its device ID In a separate device of the broadcast signal receiving device 140. For example, the separate device may be the management server 121.

In this case, any one of the management server 121, the CM distribution server 120, and the like may prepare the CM replacement permission period information (the CM replacement timing information). In addition, the broadcast signal receiving device 140 may have a function capable of prohibiting CM replacement processing by user operation. In addition, a function of displaying, for example, a representative image on the display unit 350 in place of the CM may be provided. In addition, when a plurality of representative images for replacing the CM are displayed, the user can specify "Allow CM replacement", "Not allow CM replacement", and the like for each representative image by using the operation buttons through the operation. Further, a function of displaying a message that there is a replacement CM may be set when displaying the replacement CM.

Some embodiments of the present invention have been described, but these embodiments are only suggested as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and their equivalent scope. In addition, among the constituent elements in the claims, the case where the constituent elements are divided and expressed, or when a plurality of expressions are combined, or when they are combined and expressed are within the scope of the present invention. In addition, the claims are expressed as control logic, expressed as a program including instructions to be executed by a computer, and expressed as a computer-readable recording medium describing the instructions. In addition, the names and terms used are not limited, as long as they have substantially the same content or the same purpose, other expressions are also included in the present invention.

DESCRIPTION OF REFERENCE NUMERALS

100...broadcasting station (broadcast signal transmitting device), 120...CM distribution server (CM insertion server), 121...management server, 140...broadcast signal receiving device, 160...recording medium, 330...CM replacement device.

Claims (11)

1. A broadcast signal receiving device, including:

   The receiving section receives and demodulates broadcast content;

   A replacement CM period information acquisition unit, during the CM period within the broadcast content playback period, acquiring replacement CM period information indicating the distribution period;

   Replace the CM save memory, obtain and store the replacement CM from the outside;

   A CM selection unit, based on the replacement CM period information, playing the replacement CM corresponding to the allocation period during the allocation period;

   An internal counter synchronized with the timestamp of the broadcast content;

   The CM selection control unit controls the replacement CM storage memory to output the replacement CM to the decoder or controls the replacement CM storage memory to stop when the value of the internal counter reaches the set value of the replacement CM period information The decoder outputs the replacement CM.
2. The broadcast signal receiving apparatus according to claim 1, further comprising:

   The control unit monitors the remaining capacity of the replacement CM storage memory, and when the remaining capacity is less than a predetermined value, stops acquiring the replacement CM read from the external server.
3. The broadcast signal receiving apparatus according to claim 1, further comprising:

   The control unit notifies the external server of the remaining capacity of the replacement CM storage memory.
4. The broadcast signal receiving apparatus according to claim 3,

   The control unit stops acquiring the replacement CM from the external server according to the stop instruction.
5. According to the broadcast signal receiving apparatus of claim 4, the stop instruction is issued by the external server based on judgment of remaining capacity.
6. The broadcast signal receiving apparatus according to claim 1,

   The replacement CM is associated with the broadcast content and with viewer preference.
7. A broadcast signal receiving method is applied to a control unit of a broadcast signal receiving device, which includes a control unit, an internal counter, a CM selection control unit, and a receiving unit that receives and demodulates broadcast content. The method includes:

   During the CM period within the broadcast content playing period, acquiring alternative CM period information indicating the distribution period;

   Obtain the replacement CM from the outside and store it in the replacement CM storage memory;

   Based on the replacement CM period information, playing the replacement CM corresponding to the allocation period during the allocation period;

   Synchronize the internal counter with the timestamp of the broadcast content;

   When the value of the internal counter reaches the set value of the replacement CM period information, control the replacement CM save memory to output the replacement CM to the decoder or control the replacement CM save memory to stop outputting the output to the decoder Replace CM.
8. The method of claim 7, further comprising:

   Monitoring the remaining capacity of the replacement CM save memory;

   When the remaining capacity is less than the predetermined value, stop acquiring the replacement CM read in from the external server.
9. The method of claim 7, further comprising:

   The external server is notified of the remaining capacity of the replacement CM storage memory.
10. The method of claim 9, further comprising:

    According to the stop instruction, stop acquiring the replacement CM from the external server.
11. According to the method of claim 7, the replacement CM is associated with the broadcast content and with viewer preference.

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