JP6637532B2 - Transmission / reception system, transmission / reception method - Google Patents

Description

Embodiments relate to a transmitting / receiving system and a transmitting / receiving method .

  Recently, in the field of television broadcasting, various broadcasting systems have been developed, and after the stage of test broadcasting, it is shifting to actual operation.

  For example, in addition to terrestrial digital television, BS digital, and broadband CS digital as broadcast wave types, advanced BS digital and advanced broadband CS digital are expected to be operated in the future.

  Further, depending on the television receiver, a service provider can be connected to the service provider via the Internet or the like, and can receive a service provided by a communication function from the service provider.

JP 2013-9334 A

`` Technical Document for Advanced Broadband Satellite Digital Broadcasting Operation Regulations '' ARIB TR-B39 Version 1.0 Revised on July 6, 2016, Japan Radio Industry Association "Multimedia Coding for Digital Broadcasting (2nd Generation)" ARIB STD-B62 version 1.6 Revised on September 29, 2016, The Radio Industries and Business Association "Receiver for Advanced Broadband Satellite Digital Broadcasting" ARIB STD-B63 Version 1.5 Revised on March 25, 2016, Japan Radio Industry Association

  The above-mentioned communication functions include various broadcast types, and in addition to video and audio services, communication functions for providing data broadcasting services and providing various data through two-way communication have been added. When such a communication function is introduced into a broadcasting system, various services can be performed using the communication function, but confidentiality may be required for transmitted and received data in some cases.

  For communication in such a case, rules regarding security in the data transmission method are also established as follows.

    In a service using a communication function, when a service that needs to consider transmission / reception of viewer information and fairness is performed, a security function may be required.

  By the way, when security communication is performed, there is a demand that a means for making the viewer aware of the security communication is desired. For this reason, some receivers have a display function of displaying, for example, an icon on a screen so that a viewer can understand the situation when security communication is performed.

  However, when an icon is displayed on the screen, for example, because security communication is being performed, there have been problems such that important display information cannot be seen, and a video displayed on the screen is disturbed.

  Therefore, in this embodiment, when the security communication is being performed, the display indicating that the security communication is being performed on the video and the multimedia content in a state where the video and the multimedia content are displayed on the full screen is as inconvenient as possible. An object of the present invention is to provide a receiver and a receiving method of the receiver, which can obtain a display indicating that the security communication is being executed so that the security communication is not performed.

According to an embodiment, the transmitter comprises:
A video stream, an audio stream, a data broadcast stream, a transmission unit for transmitting a broadcast wave including application control information,
The receiver is
A receiving unit that receives the broadcast wave including the video stream, the audio stream, the data broadcast stream, and the application control information transmitted by the transmitting unit;
A content processing unit that processes a broadcast wave received by the receiving unit and outputs a video signal,
A display control unit for displaying the video signal output by the content processing unit on a full screen on a display screen of a display device,
A communication unit;
An application control unit that performs communication via the communication unit based on the application control information received by the receiving unit,
A transmission / reception system comprising:
When the application control unit performs communication via the communication unit based on the application control information, a security operation detection unit detects a communication state of security communication based on transport layer security (TLS) by a security operation detection unit. Part
The display control unit further includes:
If the communication state detected by the security operation detection unit is performing the security communication, the security communication is being performed in a state where the video signal is displayed on the display screen of the display device in a full screen. Is displayed in a frame located around the display screen so as not to overlap the display of the full screen display,
Further, when the communication state detected by the security operation detection unit is a state where an error has occurred during execution of the security communication,
The cause of the error, if the root certificate itself is not on the receiver side, the fact that security communication cannot be executed because the root certificate does not exist on the receiver side is displayed on the full screen display,
If the cause of the error is that the certificate of the connection destination has expired, the certificate of the connection destination has expired, and the connection cannot be confirmed because the security of the connection destination cannot be confirmed. Display them in layers,
When the cause of the error is an authentication error related to an incorrect chain, a transmission / reception system for displaying a message indicating that the connection destination is to be interrupted on the full-screen display because a problem has occurred in the certificate setting of the connection destination. It is also a transmission / reception method.

FIG. 1 is a diagram showing an outline of a broadcast system to which an embodiment according to the present invention is applied. FIG. 2A is a diagram schematically showing a main configuration of a broadcasting station. FIG. 2B is a diagram illustrating an example of a stream and data transmitted on a broadcast wave transmission path. FIG. 3A is a configuration diagram illustrating a basic functional unit of the television receiver in detail. FIG. 3B is a diagram showing a protocol stack provided in the receiver. FIG. 4 is a diagram illustrating an example of a functional block included in the control unit. 5A and 5B show a normal state in which an image is displayed on the screen of the display 172 (FIG. 5A) and a notification state when security communication is performed (FIG. 5B). It is a figure which shows the example of)). FIG. 6A is a diagram illustrating another example of a notification state when security communication is being performed in the receiver of the embodiment. FIG. 6B is a diagram illustrating another example of the notification state when the security communication is being performed in the receiver of the embodiment. FIG. 6C is a diagram illustrating still another example of the notification state when security communication is being performed in the receiver of the embodiment. FIG. 7 is a diagram illustrating still another example of the notification state on the display when the security communication is being performed in the receiver of the embodiment. FIG. 8 is a diagram illustrating yet another example of the notification state on the display when the security communication is being performed in the receiver of the embodiment. FIG. 9A shows a normal state in which an image is displayed on the screen of the display device (FIG. 9A) and a notification state when security communication is executed (FIG. 9B) in the receiver of the embodiment. FIG. 7 is a diagram showing still another example. FIG. 9B shows a normal state in which an image is displayed on the screen of the display device (FIG. 9A) and a notification state when security communication is being executed (FIG. 9B) in the receiver of the embodiment. FIG. 21 is a diagram showing still another example of the example of FIG. FIG. 9C shows a normal state in which an image is displayed on the screen of the display device (FIG. 9A) and a notification state when security communication is being executed (FIG. 9B) in the receiver of the embodiment. FIG. 7 is a diagram showing still another example. FIG. 9D shows a normal state in which an image is displayed on the screen of the display device (FIG. 9A) and a notification state when security communication is executed (FIG. 9B) in the receiver of the embodiment. FIG. 21 is a diagram showing still another example of the example of FIG. FIG. 10 is a diagram illustrating an example of a message output state on the display when an error occurs in security communication in the receiver of the embodiment. FIG. 11 is an example of an error occurrence factor when an error occurs in security communication and an error message corresponding thereto in the receiver of the embodiment. FIG. 12 is a diagram illustrating an example of the structure of the logical plane of the receiver. FIG. 13 is an example showing a relationship between decoding of data received by the receiver 100 and creation of a presentation screen. FIG. 14 illustrates an example of display position control when a presentation screen is displayed on the display 50.

Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 shows an outline of a broadcasting system to which an embodiment according to the present invention is applied.
<Broadcasting station 300>
The broadcasting station 300 includes a broadcasting station server 350 and a security 360. The broadcast station 300 transmits a broadcast signal (a signal of any broadcast wave such as a BS digital broadcast, a broadband CS digital broadcast, an advanced BS digital broadcast, an advanced broadband CS digital broadcast, and a terrestrial digital television broadcast in this specification). Send out. The broadcast station 300 sends out digital broadcast signals, application control information, control information related to presentation, and the like, and sends metadata related to programs to a service provider device (sometimes called a service provider) 20 based on a contract. And video contents.

  The application control information informs a receiver corresponding to the present system of an application or the like linked to a program, and also includes a command for starting and ending, control information, and the like.

  Regarding the transmission method of the application control signal, for example, a transmission method using a dedicated ES (Elementary Stream), a data car cell (a transmission method for repeatedly transmitting the same data), and a control signal file stored on a server of a communication network. There is an acquisition method. A receiver corresponding to a hybrid cast, which will be described later, acquires an application from a specified URL according to an instruction of an application control signal, and performs control such as an application boundary.

  The broadcasting station 300 operates the broadcasting station server 350 in the present system. The broadcast station server 350 provides the receiver with metadata such as a program title, a program ID, a program outline, performers, broadcast date and time, and other data. Information provided by the broadcast station 300 to the service provider device 20 is provided through an API (Application Programming Interface) provided in the broadcast station server 350.

Further, the broadcasting station 300 can exchange data with the service provider apparatus 20 of the hybrid cast specification. In other words, the broadcast station 300 can provide the service provider device 20 with metadata related to the program and moving image content based on the contract.
<Service provider device 20>
The service provider device 20 includes a server 21 and an application database 22 for each service. The service provider device 20 is used by the service provider to realize contents and applications for providing services to the receiver 100 by communication via a network such as the Internet, and to realize individual services. . The service provider device 20 is also used when the service provider sells and contracts various services to the user. The service provider may also be a platform provider such as a broadcasting station or a VOD service.

  Further, when the service provider apparatus 20 is accessed from the receiver 100 as a user, the service provider apparatus 20 is not necessarily limited to the API.

  The service provider device 20 manages the application and can distribute the application to the receiver 100. The server 21 for each service in the apparatus has a server function for realizing individual services (for example, a VOD program recommendation service), a multilingual subtitle service, a social TV service, and the like. Further, the server 21 for each service not only realizes the functional aspects of the service, but also sends out the contents (VOD content, subtitle data, etc.) constituting the service.

The server 21 for each service includes a repository. The repository is registered for distributing the application of this system, and can provide and search a list of applications that can be provided in response to an inquiry from the receiver.
<Receiver 100>
The receiver 100 includes a parabolic antenna for receiving a signal from a satellite (for BS digital broadcasting or for broadband CS digital broadcasting) and a terrestrial antenna for receiving broadcast waves of the terrestrial digital television method. The receiver 100 can receive a broadcast signal transmitted from the broadcast station 300 and receive various broadcast programs and various service information by broadcasting.

  The receiver 100 can also receive a service by communication from the service provider 20 via a network such as the Internet. The service by broadcasting and the service by communication may cooperate.

  A storage medium 31 for data recording and reproduction can be connected to the receiver 100, and a display 172 and a speaker system 174 can be connected to the receiver 100 (these may be included in the receiver 100). is there).

The display 172 includes a display 50 which is an area for displaying an image, and a frame 51 arranged around the display 50 to fix the display 50.
<Mobile terminal 700>
The portable terminal 700 can communicate with the receiver 100 by a communication function. Further, the portable terminal 700 can communicate with the service provider device 20 by a communication function. The mobile terminal 700 includes, for example, a smart phone, a tablet PC terminal, and the like.

  FIG. 2A schematically shows a main configuration of broadcast station 300. The broadcasting station 300 includes a video encoder 301, an audio encoder 302, a subtitle encoder 303, and other control data and service data such as a transmission control signal, and an auxiliary data generation unit that generates application control information for controlling an application operating on the receiver side. 304 is provided. Further, the broadcasting station 300 cooperates with the broadcasting station server 350, the security function 360, and the transmission / reception unit 313.

  The transmission control signal generated by the ancillary data generation unit 304 includes various types of information and programs defined for program selection, called program specific information (PSI: Program Specific Information) and program arrangement information (SI: Service Information). Contains various information specified for the convenience of selection.

  Outputs of the video encoder 301, the audio encoder 302, the subtitle encoder 303, and the attached data generation unit 304 are streamed, and these streams are multiplexed in the multiplexing unit 305. The multiplexed stream (video stream, audio stream, data broadcast stream, application control information / service data / control data, etc.) is transmitted to the transmitter 306 as a transport stream, and transmitted from the antenna by broadcast radio waves.

  The codec type of the video encoder 301 is MPEG-2, H.264. H.264 (AVC: Advance Video Coding); H.265 (HEVC: High Efficiency Video Coding), and a codec other than these types may be used.

  FIG. 2B shows a broadcast wave transmission line 400 broadcast from the broadcast station 300. As shown in FIG. 2B, in the broadcast wave transmission path 400, application control information / service data / control data are multiplexed in addition to contents such as a video stream, an audio stream, and a data broadcast stream.

  FIG. 3A is a configuration diagram illustrating a basic functional unit of the television receiver 100 in detail. The television receiver 100 includes a terrestrial digital tuner 101 for receiving terrestrial digital television broadcasts, a BS tuner 102 for receiving BS digital broadcasts, and a CS tuner 103 for receiving broadband CS digital broadcasts. From the broadcast station, application control information / service data / control data in addition to contents such as a video stream, an audio stream, and a data broadcast stream are multiplexed and transmitted via the broadcast wave transmission path 400 described above. Come.

  When a terrestrial digital television broadcast is received, the broadcast signal is received by the terrestrial digital tuner 101, and a stream of a channel selected from the received broadcast signals is input to the 2K decoder 121.

  When a BS digital broadcast is received, the broadcast signal is received by the BS tuner 102, and a stream of a channel selected from the received broadcast signals is transmitted to the 2K decoder 131, 4K decoder 132, or 8K decoder 133. Is entered. As for the 8K decoder 133, there may be a television receiver not equipped with the 8K decoder 133.

  When a broadband CS digital broadcast is received, the broadcast signal is received by the CS tuner 103, and a stream of a channel selected from the received signals is input to the 2K decoder 141 or the 4K decoder 142.

  The selector 150 displays the video and audio decode output of any of the 2K decoder 121, the 2K decoder 131, the 4K decoder 132, the 8K decoder 133, the 2K decoder 141, and the 4K decoder 142 on the display 172 or outputs from the speaker 174. Switch the path for The decoded output selected by the selector 150 is input to a content processing unit (including a video / audio / subtitle data processing unit) 160.

  When processing content such as a video signal, an audio signal, and subtitle data, the content processing unit 160 performs color adjustment, luminance adjustment, volume adjustment, subtitle display on / off control, and the like.

  The video signal output from the content processing unit 160 is subjected to, for example, gamma correction suitable for the function and size of the display 172 having 8K display capability in the display signal output unit 171, and is output to the display 172. The audio signal output from the content processing unit 160 is converted into an audio channel corresponding to the audio system in the audio signal output unit 173, and is output to the speaker 174.

  It should be noted that some receivers (for example, devices that do not include the 8K decoder 133) have a capability of displaying up to 4K pixels, and may include a display 172 having a capability adapted to this capability.

  The control unit 180 includes a network I / F 181, a portable terminal cooperation I / F 182, a remote controller I / F 183, an application control unit 184, and the like.

  The network I / F 181 is used when receiving a service by communication such as network service information and a network distribution moving image via a network such as the Internet. The portable terminal cooperation I / F 182 is used when performing communication with the portable terminal. The remote controller I / F 183 is used to receive various commands from the remote controller 200.

  The application control unit 184 performs overall control of processing related to communication services. The application control unit 184 performs, for example, protocol control for receiving a communication service.

  The control unit 180 controls a graphic user I / F (GUI) 191, and for example, through the graphic user I / F 191 and the display signal output unit 171, for example, a program table, various messages, and a user using a screen. A user interface image for providing an operation input can be output.

  Further, the control unit 180 determines the layout of the display content displayed on the display screen of the display 172 in order to notify the user of the communication status in the security communication described later, It can display the security communication status so as not to overlap the display contents displayed on the display 172 display screen, or can output a control signal for controlling an indicator provided in a frame of the display 172, for example. .

  Of course, the control unit 180 can generally control the functional states of various blocks in the receiver, such as the tuner, the decoder, and the content processing unit 160.

  In response to the operation of the remote controller 200, the control unit 180 controls each tuner, each decoder, the selector 150, and the like, and executes channel selection for a channel to be viewed.

  The application engine 185 forms an environment for executing an application such as a browser. The application controlled by the application engine 185 is described in, for example, HTML5. The application engine 185 operates the application in accordance with a protocol controlled by the application control unit 184, for example, control information obtained by HTTP, or operates the application in accordance with a user input operation input via the GUI 191.

  FIG. 3B shows a protocol stack included in the receiver 100. The receiver 100 has a protocol for realizing a broadcast function and a protocol for realizing a communication function. 3B1 is a protocol for realizing broadcasting. 3B2 is a protocol for realizing communication. The application control unit 184 controls a protocol required to receive a communication service.

  The mobile terminal cooperation I / F 182 is an interface that executes cooperation with an external mobile terminal.

  FIG. 4 is a diagram illustrating a configuration example in the control unit 180 of the receiving device.

  The various control units are not limited to the classifications shown in the drawing, and various control units can be added or eliminated depending on the installed application. The illustrated example will be described.

  180j is a security operation detection unit that detects that the security function is operating. The security operation detecting unit 180j detects whether security communication is set in the protocol control performed by the application control unit 184 in cooperation with the protocol control performed by the application control unit 184. When detecting that security communication is set in the protocol control performed by the application control unit 184, the security operation detection unit 180j notifies a security operation detection notification to the display control unit 180k.

  The security communication performed by the application control unit 184 is, for example, a case where https is set in the scheme (ARIB TR-B39 Version 1.0 Third Volume, Chapter 6 Operation of Communication Table 6-1). When https is set in the scheme, it is desirable to comply with TLS 1.2 security, but other encrypted communication technologies may be used.

  The security operation detection unit 180j detects whether an error has occurred in the security communication performed by the application control unit 184 in cooperation with the protocol control performed by the application control unit 184. When detecting that an error has occurred in the security communication performed by the application control unit 184, the security operation detection unit 180j notifies the display control unit 180k of an error occurrence notification and an error factor.

  The display control unit 180k provides a presentation function (ARIB STD-B62 5.2) that displays on the display 50 of the display 172 together an image displayed based on a broadcast service, an image displayed based on a communication service, and the like. (Corresponding to the presentation function described in (1)). Further, the display control unit 180k responds to the security operation detection notification sent from the security detection unit 180j to display the video and multimedia contents to the user (viewer) in a state where the video and multimedia contents are displayed on the full screen. The display indicating that the security communication is being executed is performed so that the display of the fact that the security communication is being executed on the media content is not inconvenient as much as possible.

  The display during which the security communication is being executed includes a method of displaying on the display 50 of the display 172 and a method of displaying on the frame 51 arranged around the display 50, as described later.

  Furthermore, the display control unit 180k displays an error occurrence message (which may be referred to as an error message) on the display 50 in accordance with the error occurrence notification and the error cause sent from the security operation detection unit 180j. Can be displayed.

  The control unit 180 further includes a service data analysis unit 180w that receives and analyzes service data, control data, and the like different from the video / audio content.

  The control unit 180 includes a tuner control unit 180s, a decoder control unit 180t, a content processing control unit 180u, and each output control unit 180v such as an audio output.

  The tuner control section 180s operates to select and switch tuners, and to select and switch channels. The decoder control unit 180t operates to select or switch various decoders. The content processing control unit 180u outputs a control signal related to content (video, audio, subtitle display, and the like).

  Each output control unit 180v selects the output form of the audio signal (stereo output, monaural output, five-channel output, etc.) and the output form of the video signal (selects 8K, 4K, 2K output, frame frequency, etc.). . Therefore, each output control unit 180v performs type information of the audio system (stereo, monaural, number of channels, etc.), display capability information of the connected display (information of the number of pixels such as 8K, 4K, 2K, etc., adaptive frame frequency Information, etc.).

  Note that the device that gives the operation input may be a mobile terminal or an operation button provided on the housing of the receiver 100 in addition to the remote controller 200.

  The display control unit 180k also includes an error notification unit when an error occurs during security communication, as described later. The error notification unit can display an error occurrence message (which may be referred to as an error message) on the display in a manner that is easy for the user to understand.

  In FIG. 5, the display 172 when the security operation detection unit 180j and the display control unit 180k operate are indicated by the eyes viewed from the viewer. The example of FIG. 5A shows a normal state in which a video 50p (multimedia plane) is displayed on the display 50 of the display 172 in the receiver 100, and FIG. 9 shows an example of a state in which security communication is being executed when security communication is being executed. As shown in FIG. 5B, in this embodiment, an indicator 52 including, for example, a plurality of light sources 52a, 52b,..., 52d is provided on a part of the frame 51 of the display 172. Note that the name of the indicator 52 is not limited, and it is essential that the indicator 52 be a light source or a luminance capable of visually catching the state change. The plane will be described with reference to FIGS.

  The light sources 52a, 52b,... 52d are normally turned off, and the light sources 52a, 52b,. This allows the viewer to visually grasp the change. When the light sources 52a, 52b,... 52d are sequentially turned on cyclically, the cyclic speed may be different depending on the type of security communication (for example, importance). In addition, the plurality of light sources may have different colors, and different colors may blink according to the type of security communication (for example, importance).

  The number of light sources may be one, which is normally off, but may be blinking or lit when security communication is being performed.

  In the example of FIG. 5B, an indicator 52 (light sources 52a, 52b,..., 52d) is provided on a part of the right side of the frame 51. However, the position where the indicator 52 is provided is not limited to this location, and the position where the indicator 52 is provided may be selected at various positions such as a lower part of the frame 51, an upper part, a right part, and a corner portion. . The advantage of providing the indicator 52 in the frame 51 is that notifying that the security communication is being performed over the video or multimedia content displayed on the display is, for example, hiding an advertisement display or the like depending on the display content. There is a fear that if the notification is made outside the display 50, the problem can be solved.

  FIG. 6A shows another example of a notification state when security communication is being performed in the receiver of the embodiment. In this example, the indicator 52 (light sources 52a, 52b, 52c) is arranged in a lower part of the frame 51, for example, in a central area on the left and right sides. Also in this example, the plurality of light sources may have different colors, and different colors may blink according to the type of security communication (for example, importance). In this case, some users may want to know that security communication is being performed, and it is desirable to arrange them in the most prominent position, that is, in the left and right central areas. Ergonomically, the visual range of a person is said to be biased toward the center of the display screen.

  FIG. 6B illustrates another example of a state in which the security communication is being executed and the security communication is being executed in the receiver of the embodiment. In this example, the indicator 52 (light sources 52a, 52b, 52c) is provided at a location different from the frame 51. For example, the indicator 52 may be arranged on a part of the stand 51s that supports the frame 51.

  Further, the receiver 100 has a function of cooperating with the portable terminal 700 by mutual communication. Therefore, for example, a control signal may be transmitted to the portable terminal 700 (smart phone, tablet PC, or the like) registered in the receiver, and the indicator 52 may be displayed. The indicator 52 may be provided in the remote controller 200. In this case, the remote controller 200 has a receiving function for performing mutual communication with the television receiver 100.

  FIG. 6C shows still another example of a state in which a notification of execution of security communication is being made when security communication is being executed in the receiver of the embodiment. This example is another example in which the indicator 52 (the light sources 52a, 52b, and 52c) is provided in a place different from the frame 51. For example, the indicator 52 may be arranged on the decoration 175 located below the frame 51. The decoration 175 includes a speaker 174.

  FIG. 7 shows still another example of the notification state on the display when security communication is being performed in the receiver of the embodiment. In this example, a recess 53 is provided on an end surface (may be referred to as a thickness surface) 51b of a side portion of the frame 51, and a light source 52x is provided at the bottom of the recess 53. With this configuration, when the light source 52x is turned on, the viewer perceives it as indirect lighting. Therefore, even if the light source 52x is turned on or blinks during the execution of the security communication, it is possible for the viewer to recognize the light source 52x without hindrance.

In this embodiment, the side end face of the frame 51 may be used if the user is not so interested in the security communication and wishes to be installed in an inconspicuous position.
Further, any of the embodiment shown in FIGS. 6A to 6C and the embodiment shown in FIG. 7 may be selected at the time of initial setting. In the case where the indicator 52 is provided as in the case of indirect lighting, it is needless to say that the present invention is not limited to the embodiment of FIG. For example, a plurality of light sources are used, and various arrangement positions of the indicator can be selected.

  FIG. 8 shows still another example of the notification state on the display when the security communication is being performed in the receiver 100 of the embodiment. In this example, a connector mechanism is provided on an end surface (may be referred to as a thickness surface) 51b of a side portion of the frame 51. The plug 54 is inserted into the connector receptacle. Therefore, in this embodiment, a light source 52y such as an LED is provided for the plug 52y, and this is used as the indicator 52.

  FIG. 9A shows a normal state (FIG. 9A (a)) in which the image 50p (multimedia plane) is displayed on the entire area of the display 50 of the display 172 in the receiver 100 of the embodiment (FIG. 9A (a)). An example of a display notification state (FIG. 9A (b)) in which 50p (multimedia plane) is reduced on the display 50 is shown. As shown in FIG. 9A (b), in this embodiment, when security communication is being performed, the video 50p (multimedia plane) is reduced in size from the display 50 to the video 50p (multimedia plane). (Media plane) is displayed on the display 50 without missing. In the process of reducing the video 50p (multimedia plane), the display control unit 180k displays the image on the display 50 according to the security operation detection notification sent from the security operation detection unit 180j that has detected that the security communication is being performed. This is implemented by controlling the size of the multimedia plane.

  When the image 50p (multimedia plane) is displayed in a reduced size with respect to the area of the display 50, a remaining portion where the image 50p (multimedia plane) is not displayed occurs in the area of the display 50. The remaining portion is displayed in black, for example. A security-related message 55 is displayed on the black display area via the GUI 191. For example, a display such as "Data is being updated now" is displayed.

  In the example of FIG. 9A (b) described above, the reduction of the video 50p (multimedia plane) results in black areas at the top, bottom, left, and right of the screen, but this is not a limitation. The black area may be prepared in any one of the upper, lower, left and right directions of the screen, and a security-related message may be displayed in this area.

  FIG. 9B shows a normal state (FIG. 9B (a)) in which the image 50p (multimedia plane) is displayed on the entire area of the display 50 of the display 172 in the receiver 100 of the embodiment (FIG. 9B (a)). FIG. 9B shows another example of the display notification state (FIG. 9B (b)) in which 50p (multimedia plane) is reduced on the display 50. However, this example is an example in which a broadcast screen 50A by radio wave broadcast and a communication screen 50B by data broadcast are simultaneously displayed on the video 50p (multimedia plane). That is, the broadcast screen and the communication screen are simultaneously displayed. As shown in FIG. 9B (b), in this embodiment, when security communication is being performed, the size of the video (multimedia plane) of the broadcast screen 50A and the communication screen 50B is smaller than the size of the display 50. In this state, the video (multimedia plane) of the broadcast screen 50A and the communication screen 50B is displayed on the display 50 without loss.

  When the video (multimedia plane) of the broadcast screen 50A and the communication screen 50B is reduced and displayed in the area of the display 50, the video (multimedia plane) of the broadcast screen 50A and the communication screen 50B is displayed in the area of the display 50. There is a residual part that is not displayed. The remaining portion is displayed in black, for example. A security-related message 55 is displayed on the black display area via the GUI 191. For example, a display such as "Data is being updated now" is displayed. In this case as well, black areas are shown above, below, right and left of the screen, but the present invention is not limited to this. The black area may be prepared in any one of the upper, lower, left and right directions of the screen, and a security-related message may be displayed in this area.

  FIG. 9C illustrates a normal state (FIG. 9C (a)) in which the image 50p (multimedia plane) is displayed in the entire area of the display 50 of the display 172 in the receiver 100 of the embodiment (FIG. 9C (a)). FIG. 10C shows still another example of the display notification state (FIG. 9C (b)) in which 50p (multimedia plane) is reduced on the display 50. This example is an example in which a broadcast screen 50A by radio broadcast and a communication screen 50B by data broadcast are simultaneously displayed on the video 50p (multimedia plane) as in FIG. 9B, but nothing is displayed on the display 50. This is an example in which an unnecessary area 50C exists. In the layout of the display on the display 50, when security communication is executed, as shown in FIG. 9C (b), the broadcast screen 50A and the communication screen 50B are not reduced, and the portion of the display 50C (black display area) is not reduced. Is displayed via the GUI 191. For example, a display such as "Data is being updated now" is displayed.

  FIG. 9D shows the receiver of the embodiment, in a normal state (FIG. 9D (a)) in which video 50p (multimedia plane) is displayed in the remaining area of display 50 of display 172, and security communication is being performed. It is a figure of the other example which shows a display notification state (FIG.9D (b)). This example is also an example in which a broadcast screen 50A based on radio broadcast and a communication screen 50B based on data broadcast are simultaneously displayed. That is, the broadcast screen and the communication screen are simultaneously displayed. In such a situation, when the security communication starts, as shown in FIG. 9D (b), the indicator 52 provided on the frame 51 arranged around the display 50 indicates that the security communication is being executed. Alternatively, it may be displayed that security communication is being performed by blinking and lighting an indicator 52 provided at a location different from the frame 51, for example, a stand or the like.

  FIG. 10 shows an example of a message output state on the display when an error occurs in security communication in the receiver of the embodiment. When an error occurs in the security communication, it is preferable to notify the user. Therefore, in this embodiment, when an error occurs, the error message 60 is displayed over the screen while the video and the multimedia content are displayed on the screen. In the example of FIG. 10, an example of the embodiment is shown in FIG. 6 as an embodiment for notifying the security communication state, but any one of the embodiments shown in FIGS. Alternatively, the display example of the error message 60 in FIG. 10 may be combined.

  In FIG. 10, the error message 60 is displayed in the lower area of the display 50, but is not limited to this area, and may be displayed in any area. The message is not limited to a sentence, but may be an icon or any other display as long as the viewer (user) can recognize the occurrence of the error.

  FIG. 11 shows an example of an error factor and an error message displayed on the display 50 when an error occurs in the security communication performed by the application control unit 184.

  FIG. 12 is a diagram illustrating an example of a logical plane configured by the receiver 100. The plane is a logical display screen configured by the display control unit 180k for displaying monomedia, multimedia, and the like on the display 50. The plane includes a character super plane for displaying superimposed text, a subtitle plane for displaying subtitles, a monomedia alone such as broadcast video or a multimedia plane for performing composite display of a multimedia application, and a background for displaying a background color. There is a plane.

  The receiver 100 forms a plane to be presented on the display 50 by creating each plane based on data transmitted by broadcasting or communication and combining the created planes.

  FIG. 13 is an example showing a relationship between decoding of data received by the receiver 100 and creation of a screen to be presented.

  Each of the streams 1301 received as a broadcast stream or a communication stream is subjected to separation processing by the decoder control unit 180t, and is subjected to decoding processing (1303). The data decoded by the decoder control unit 180t is sent to the display control unit 180k, and the display control unit 180k creates each plane based on the type of the sent data (1305). When the creation of each plane is completed, the display control unit 180k performs a presentation process. The display control unit 180k configures a screen to be presented on the display 50 of the display unit 172 by performing a presentation process of changing the color gamut and dynamic range as necessary and combining the created planes.

  The display control unit 180k displays a presentation screen on the display 50 by designating a display position, which is a layout on the display, in order to display the screen to be presented on the display 50.

  FIG. 14 illustrates an example of control of a display position when the display control unit 180k displays the screen to be presented created on the display 50. FIG. 14A shows an example in which the display position of the screen presented by the display control unit 180k is not specified. In this case, the screen to be presented created by the display control unit 180k is displayed over the entire area of the display 50. FIG. 14B shows an example in which the display position of the screen presented by the display control unit 180k is specified. The display position is a case where a rectangular area having (0, 0) and (5759, 3239) as diagonal vertices is designated as a coordinate system (physical coordinates) on the display 50. The area of the screen to be displayed displayed in this display area is a rectangular area having the coordinate system (coordinates within the plane) of the plane of the screen to be displayed and having (0, 0) and (7679, 4319) as diagonal vertices. . That is, it is the entire area of the presentation screen. Thus, the entire area of the screen to be presented is reduced and displayed in a rectangular area having (0, 0) and (5759, 3239) in the coordinate system on the display 50 as diagonal vertices. The display area of the display 50 is (0,0) to (7679,4319) as a coordinate system on the display. 9A (b) and 9B (b) correspond to examples of the reduced presentation screen.

  According to the present embodiment, the characteristic portions can be summarized in various forms as follows. In the above embodiment, it is described that TLS is used for security communication. However, the present invention is not limited to this, and it is a matter of course that another encryption technique may be used.

According to the present embodiment, there is provided a receiver including a video signal processing unit, a display, and a communication unit, and a control for detecting security communication based on transport layer security (TLS) via the communication unit. Part
When there is no error in the security communication, the control unit displays a notification outside the display screen of the display unit to notify that a function related to security is operating.
(A00) A receiver including a video signal processing unit, a display, and a communication unit, including a control unit that detects security communication based on transport layer security (TLS) via the communication unit. And
The control unit includes:
A receiver that, when there is no error in the security communication, displays a notification outside the display screen of the display unit to notify that a function related to security is operating.
(A11) A receiver including a video signal processing unit, a display, and a communication unit,
A control unit that detects security communication based on transport layer security (TLS) via the communication unit;
The control unit includes:
When there is no error in the security communication, a notification display indicating that a function related to security is operating is performed outside the display screen of the display unit, and the location of the notification display is a screen of the display screen. A receiver, wherein the display area is a display area of the display in a state where the display area is a reduced display screen, and the remaining area in the display area around the reduced display screen.
(A12) In the above A11, the display screen displays a video image by broadcast and / or a multimedia content by data broadcast.
(A13) In the above A11, the display screen is configured by a plurality of overlapping planes, and the video arranged on each plane is managed.
(B11) A receiver including a video signal processing unit, a display, and a communication unit,
A control unit that detects security communication based on transport layer security (TLS) via the communication unit;
The control unit includes:
If there is no error in the security communication, a notification display indicating that a function related to security is operating is performed outside the display screen of the display, and the location of the notification display is a frame of the display. And the receiver.
(B12) In the above B11, the display screen displays a video image by broadcast and / or a multimedia content by data broadcast.
(B13) In the above B11, the display screen is composed of a plurality of overlapping planes, and the video arranged on each plane is managed.
(C11) A receiver including a video signal processing unit, a display, and a communication unit,
A control unit that detects security communication based on transport layer security (TLS) via the communication unit;
The control unit includes:
If there is no error in the security communication, a notification display indicating that a function related to security is operating is performed outside the display screen of the display, and the location of the notification display is a frame of the display. Position different from
Receiving machine.
(C12) In the above C11, the display screen displays a video image by broadcast and / or a multimedia content by data broadcast.
(C13) In addition, the display screen is configured by a plurality of overlapping planes, and manages video arranged on each plane.
(D21) A receiver including a video signal processing unit, a display, and a communication unit,
A control unit that detects security communication based on transport layer security (TLS) via the communication unit;
The control unit includes:
If there is no error in the security communication, a notification display indicating that a function related to security is operating is performed outside the display screen of the display device, and the location of the notification display is a screen of the display screen. In the display area of the display device in a state where the area is a reduced display screen, as a remaining portion in the display area around the reduced display screen,
If there is an error in the security communication, display a message that an error has occurred over the display screen,
Receiving machine.
(D22) In the above D21, the display screen displays a video image by broadcast and / or a multimedia content by data broadcast.
(D23) Further, the display screen is composed of a plurality of overlapping planes, and the video arranged on each plane is managed.
(E21) A receiver including a video signal processing unit, a display, and a communication unit,
A control unit that detects security communication based on transport layer security (TLS) via the communication unit;
The control unit includes:
If there is no error in the security communication, a notification display indicating that a function related to security is operating is performed outside the display screen of the display, and the location of the notification display is a frame of the display. age,
If there is an error in the security communication, display a message that an error has occurred over the display screen,
Receiving machine.
(E22) In the above E21, the display screen displays a video image by broadcast and / or a multimedia content by data broadcast.
(E23) Further, the display screen is composed of a plurality of overlapping planes, and the video arranged on each plane is managed.
(F21) A receiver including a video signal processing unit, a display, and a communication unit,
A control unit that detects security communication based on transport layer security (TLS) via the communication unit;
The control unit includes:
When there is no error in the security communication, a notification display is provided outside the display screen of the display to notify that a function related to security is operating, and the location of the notification display is the display of the display. It is a different position from the frame,
If there is an error in the security communication, display a message that an error has occurred over the display screen,
Receiving machine.
(F22) In the above F21, the display screen displays a video image by broadcast and / or a multimedia content by data broadcast.
(F23) Further, the display screen is composed of a plurality of overlapping planes, and the video arranged on each plane is managed.
(G11) A receiver including a video signal processing unit, a display, and a communication unit,
A control unit that detects security communication based on transport layer security (TLS) via the communication unit;
The control unit includes:
If there is no error in the security communication, a notification display indicating that a function related to security is operating is performed outside the display screen of the display, and the location of the notification display is a frame of the display. And near the left and right center of the lower part of the frame,
Receiving machine.
(G12) In the above G11, the display screen displays video by broadcast and / or multimedia content by data broadcast.
(G13) In addition, the display screen is configured by a plurality of overlapping planes, and manages video arranged on each plane.
(H41) The following can be made dependent on the above (A11) to (C12), the above (D21) to (F22), and (G11).
(a) the frame is provided with a light source whose brightness changes as the display,
(b) the frame is provided with a light source that changes color as the display,
(c) the light source is a left and right center of a lower portion of the frame,
(d) a plurality of the light sources are provided on a lower portion of the frame,
(e) Equipped with TLS 1.2,
(f) Communication using “https:...”, etc., or any combination thereof can be performed.
(A11) A receiving method of a receiver including a video signal processing unit, a display, a communication unit, and a control unit,
Obtaining a security communication detection signal based on transport layer security (TLS),
When responding to the security communication detection signal,
When there is no security communication error, a notification display notifying that a function related to security is operating is performed outside the display screen of the display unit, and the location of the notification display is a screen of the display screen. In the display area of the display device in a state where the area is a reduced display screen, and the remaining portion in the display area around the reduced display screen,
The receiving method of the receiver.
(B11) A receiving method of a receiver including a video signal processing unit, a display, a communication unit, and a control unit,
Obtaining a security communication detection signal based on transport layer security (TLS),
When responding to the security communication detection signal,
When there is no security communication error, a notification display indicating that a function related to security is operating is performed outside the display screen of the display device, and the location of the notification display is a frame of the display device. Do
The receiving method of the receiver.
(C11) A receiving method of a receiver including a video signal processing unit, a display, a communication unit, and a control unit,
Obtaining a security communication detection signal based on transport layer security (TLS) via the communication unit;
When responding to the security communication detection signal,
When there is no security communication error, a notification display for notifying that a function related to security is operating is performed outside the display screen of the display, and the location of the notification display is a frame of the display. Position different from
The receiving method of the receiver.
(D21) A receiving method of a receiver including a video signal processing unit, a display, a communication unit, and a control unit,
Obtaining a security communication detection signal based on transport layer security (TLS) via the communication unit;
When responding to the security communication detection signal,
When there is no security communication error, a notification display notifying that a function related to security is operating is performed outside the display screen of the display unit, and the location of the notification display is a screen of the display screen. In the display area of the display device in a state where the area is a reduced display screen, as a remaining portion in the display area around the reduced display screen,
If there is an error in the security communication, display a message that an error has occurred over the display screen,
The receiving method of the receiver.
(E21) A receiving method of a receiver including a video signal processing unit, a display, a communication unit, and a control unit,
Obtaining a security communication detection signal based on transport layer security (TLS) via the communication unit;
When responding to the security communication detection signal,
When there is no security communication error, a notification indicating that a function related to security is operating is performed outside the display screen of the display, and the location of the notification is set to a frame of the display. ,
If there is an error in the security communication, display a message that an error has occurred over the display screen,
The receiving method of the receiver.
(F21) A receiving method of a receiver including a video signal processing unit, a display, a communication unit, and a control unit,
Obtaining a security communication detection signal based on transport layer security (TLS) via the communication unit;
When responding to the security communication detection signal,
When there is no security communication error, a notification display is provided outside the display screen of the display to notify that a function related to security is operating, and the location of the notification display is a frame of the display. Position different from
If there is an error in the security communication, display a message that an error has occurred over the display screen,
The receiving method of the receiver.
(G11) A receiving method of a receiver including a video signal processing unit, a display, a communication unit, and a control unit,
Obtaining a security communication detection signal based on transport layer security (TLS) via the communication unit;
When responding to the security communication detection signal,
When there is no security communication error, a notification indicating that a function related to security is operating is performed outside the display screen of the display, and the location of the notification is set to a frame of the display. And near the left and right center of the lower portion of the frame,
The receiving method of the receiver.
<More explanation about security>
In a service using a communication function, when a service that requires consideration of transmission / reception of viewer information and fairness is performed, a security function may be required. The security functions required at this time include (a) a simple mutual authentication function, (b) an information protection function, (c) a falsification prevention function, and (d) a simple certification function.
(A) Simple mutual authentication function When using an application that requires privacy protection or confirmation of a valid viewer in communication, it is necessary to confirm the connected party / connection destination at the initial stage of the transaction. As the means, a mutual (counterpart) authentication function is used.

In mutual authentication, it is desirable to use the "message restoration method".
It is desirable that the information sent to the center be transmitted after the time stamp and the random number are passed through a one-way function in order to prevent a fake viewer from impersonating by reusing the ID and password of the receiver.

  In the message restoration method described above, mutual authentication is also possible between the sender of the information (message) and the receiver of the information (message). For encryption, a card ID, a pseudo-random number, and a time stamp are used, and a communication message is created on the transmission side. In order to decrypt this, the sender and the recipient need a common key with each other. The common key of the sending side is encrypted and sent to the receiving side as common key encryption by a different route from the encrypted information (message).

If the sender / receiver (verifier) shares a common key in advance, the message is encrypted on the sending side using the common key, and it becomes meaningful when the ciphertext is decrypted by the receiver. A certain message can confirm the sender. If a meaningful message cannot be obtained, it means that there has been tampering or transmission error.
(B) Information Protection In a service using a communication function, a service provider may need to know the name and address of a viewer in order to specify a destination like shopping. In a service using such a communication function, it is desirable to consider the following in order to prevent leakage of viewer information from the viewpoint of privacy protection.
-Prevents wiretapping on the network-Prevents leakage in the center-Prevents entry into the center from outside.
・ We handle only necessary personal data and do not use or transfer it for other purposes without permission.
・ As functions and operations that the center should perform,
If it is inevitable to connect to other networks such as the Internet when expanding the service content, install a firewall to prevent the leakage of viewer information.
(C) Tampering Prevention Function It is desirable to have a function of detecting that tampering has been performed when there is tampering in the communication path.
(D) Signature function When there is a transaction of money and goods (including digital contents) for shopping online, it is necessary to leave evidence of both parties to prevent trouble. In such a case, it is ideal to use a digital signature.However, since a digital signature cannot be realized without implementing a public key cryptographic function, a message authenticator ( It is desirable to use MAC).
However, although it is convinced that the result is not a signature generated by a third party, the same message can also be created by the signature receiver, so that there is no effect on the signature generator on the center side.

<Additional explanation about security>
In communication transmission of multimedia service contents, TLS is applied when the scheme is designated by “https:”. It is assumed that the security algorithm in TLS is updated due to security issues or the like. Therefore, when the security algorithm is updated, it is necessary to be able to update the security algorithm operating on the browser by taking measures such as updating the receiver software.

  It is necessary that the receiver implements TLS1.2 and has a mechanism to perform encrypted communication using the public key cryptosystem (PKCS).

  When an error occurs in the security communication, it is necessary to display an error message shown in FIG. 11 to surely inform the user that the security communication cannot be used. In addition, when an error occurs in the security communication, implementation that does not execute the communication is also possible.

  The root certificate operated in the security communication must conform to TLS1.2 and a certificate for performing the encrypted communication by the public key cryptosystem (PKCS) must be available in the browser.

  In addition, it is desirable that the receiver has a function of displaying a root certificate that can be used in a browser.

  It is assumed that a new root certificate needs to be operated due to the expiration date of the root certificate and the update of the security algorithm. Therefore, it is necessary that a new root certificate can be added in the browser by taking measures such as updating the receiver software.

  Although several embodiments of the present invention have been described, these embodiments are provided by way of example and are not intended to limit the scope of the invention. These new embodiments can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and their equivalents.

20 ・ ・ ・ Service provider device,
50 ... display,
50A ... broadcast screen,
50B ... communication screen,
51 ... frame,
52 ... indicator,
100 ... television receiver,
101 ... terrestrial digital tuner,
102 ... BS tuner,
103 ... CS tuner,
121, 131, 132, 133, 141, 142 ... decoder
160 ... content processing unit,
171, a display signal output unit,
172 ... display,
173: audio signal output unit
180 ... control unit,
180j ... security operation detecting unit
180k: display control unit,
185: application engine,
186... Terminal control unit,
191 ... GUI,
200 ... remote controller,
300: Broadcasting station 700: Portable terminal.

Claims (2)

The transmitter is
A video stream, an audio stream, a data broadcast stream, a transmission unit for transmitting a broadcast wave including application control information,
The receiver is
A receiving unit that receives the broadcast wave including the video stream, the audio stream, the data broadcast stream, and the application control information transmitted by the transmitting unit;
A content processing unit that processes a broadcast wave received by the receiving unit and outputs a video signal,
A display control unit for displaying the video signal output by the content processing unit on a full screen on a display screen of a display device,
A communication unit;
An application control unit that performs communication via the communication unit based on the application control information received by the receiving unit,
A transmission / reception system comprising:
When the application control unit performs communication via the communication unit based on the application control information, a security operation detection unit detects a communication state of security communication based on transport layer security (TLS) by a security operation detection unit. Part
The display control unit further includes:
If the communication state detected by the security operation detection unit is performing the security communication, the security communication is being performed in a state where the video signal is displayed on the display screen of the display device in a full screen. Is displayed in a frame located around the display screen so as not to overlap the display of the full screen display,
Further, when the communication state detected by the security operation detection unit is a state where an error has occurred during execution of the security communication,
The cause of the error, if the root certificate itself is not on the receiver side, the fact that security communication cannot be executed because the root certificate does not exist on the receiver side is displayed on the full screen display,
If the cause of the error is that the certificate of the connection destination has expired, the certificate of the connection destination has expired, and the connection cannot be confirmed because the security of the connection destination cannot be confirmed. Display them in layers,
When the cause of the error is an authentication error related to an incorrect chain, a transmission / reception system for displaying a message indicating that the connection destination is to be interrupted on the full-screen display because a problem has occurred in the certificate setting of the connection destination. . The transmitter transmits a broadcast wave including a video stream, an audio stream, a data broadcast stream, and application control information,
The receiver is
A receiving unit that receives the broadcast wave including the video stream, the audio stream, the data broadcast stream, and the application control information transmitted by the transmitter, and a content processing unit that receives the broadcast received by the receiving unit. Processing the wave to output a video signal, the display control unit causes the video signal output by the content processing unit to be displayed on a display screen of a display device on a full screen, and the application control unit receiving the reception unit A communication method for performing communication via a communication unit based on the application control information,
When the application control unit performs communication via the communication unit based on the application control information, a security operation detection unit detects a communication state of security communication based on transport layer security (TLS),
The display control unit further includes:
If the communication state detected by the security operation detection unit is performing the security communication, the security communication is being performed in a state where the video signal is displayed on the display screen of the display device in a full screen. Is displayed in a frame located around the display screen so as not to overlap the display of the full screen display,
Further, when the communication state detected by the security operation detection unit is a state where an error has occurred during execution of the security communication,
The cause of the error, if the root certificate itself is not on the receiver side, the fact that security communication cannot be executed because the root certificate does not exist on the receiver side is displayed on the full screen display,
If the cause of the error is that the certificate of the connection destination has expired, the certificate of the connection destination has expired, and the connection cannot be confirmed because the security of the connection destination cannot be confirmed. Display them in layers,
If the cause of the error is an authentication error related to an incorrect chain, a problem has occurred in the certificate setting of the connection destination, and a transmission / reception method for superimposing the interruption of the connection destination on the full-screen display is displayed. .

Images