JP6764908B2 - Transmission / reception system, transmission / reception method - Google Patents

Description

Embodiments of the present invention relate to a transmission / reception system and a transmission / reception method .

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

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

Further, depending on the television receiver, it is possible to connect to the service provider via the Internet or the like and receive the service by the communication function from the service provider.

Japanese Unexamined Patent Publication No. 2013-9334

"Technical Data for Advanced Broadband Satellite Digital Broadcasting Operation Regulations" ARIB TR-B39 1.0 version Revised on July 6, 2016, Association of Radio Industries and Businesses "Multimedia Encoding Method in Digital Broadcasting (2nd Generation)" ARIB STD-B62 1.6 Edition Revised on September 29, 2016, Association of Radio Industries and Businesses "Receiver for Advanced Broadband Satellite Digital Broadcasting" ARIB STD-B63 1.5 Edition Revised on March 25, 2016, Association of Radio Industries and Businesses

In the above-mentioned communication functions, there are various broadcasting types, and in addition to video and audio services, communication functions for providing various data by data broadcasting and two-way communication have been added. When such a communication function is introduced into a broadcasting system, various services can be provided by using the communication function, but the transmitted / received data may need to be confidential.

For communication in such cases, security rules for data transmission methods have also been established as follows.

In services that use communication functions, security functions may be required when providing services that require consideration of transmission / reception of viewer information and fairness.

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

However, even if security communication is performed, when an icon is displayed on the screen, for example, important display information cannot be seen, and the image displayed on the screen is disturbed.

Therefore, in this embodiment, when the security communication is being executed, the display that the security communication is being executed for the video and the multimedia content in the state where the video and the multimedia content are displayed in full screen is as defective as possible. It is an object of the present invention to provide a receiver and a receiving method of the receiver so as to obtain a display indicating that the security communication is being executed so as not to be the case.

According to the embodiment, a transmitter and a receiver are provided.
The transmitter
It is equipped with a transmission means for transmitting a broadcast wave including a video stream, an audio stream, a data broadcast stream, and application control information.
The receiver
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 transmission means.
A content processing unit that processes the broadcast wave received by the receiving unit and outputs a video signal,
A display control unit that displays the video signal output by the content processing unit in full screen on the display screen of the display unit.
With the communication department
An application control unit that communicates via the communication unit based on the application control information received by the reception unit, and
It is a transmission / reception system equipped with
When the application control unit executes communication via the communication unit based on the application control information, the application control unit has a security operation detection unit that detects a communication state of security communication based on transport layer security (TLS).
The display control unit further
When the communication state detected by the security operation detection unit is the execution of the security communication, the security communication is being executed with the video signal displayed in full screen on the display screen of the display. Is displayed in a frame located around the display screen so that the display of the above is not overlapped with the full screen display.
Further, when the communication state detected by the security operation detection unit is a state in which an error occurs during execution of the security communication,
If the cause of the error is that 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 top of the full screen display.
If the cause of the error is an authentication processing error of a line failure, the fact that the connection could not be established within the set time is displayed superimposed on the full screen display.
If the cause of the error is a mismatch in the common name of the server certificate, the connection destination certificate does not include the name of the page you are trying to display, and you cannot connect because the security of the connection destination cannot be confirmed. , Overlay on the full screen display
It is a transmission / reception system and a transmission / reception method.

FIG. 1 is a diagram showing an outline of a broadcasting system to which the 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 showing an example of a stream and data transmitted on a broadcast wave transmission line. FIG. 3A is a configuration diagram showing in detail the basic functional unit of the television receiver. FIG. 3B is a diagram showing a protocol stack included in the receiver. FIG. 4 is a diagram showing an example of a functional block included in the control unit. FIG. 5 shows a normal state in which an image is displayed on the screen of the display 172 in the receiver of the embodiment (FIG. 5A) and a notification state when security communication is being executed (FIG. 5B). )) Is a diagram showing an example. FIG. 6A is a diagram showing another example of the notification state when security communication is being executed in the receiver of the embodiment. FIG. 6B is a diagram showing another example of the notification state when security communication is being executed in the receiver of the embodiment. FIG. 6C is a diagram showing still another example of the notification state when security communication is being executed in the receiver of the embodiment. FIG. 7 is a diagram showing still another example of the notification state on the display when security communication is being executed in the receiver of the embodiment. FIG. 8 is a diagram showing still another example of the notification state on the display when security communication is being executed in the receiver of the embodiment. 9A shows a normal state in which an image is displayed on the screen of the display in the receiver of the embodiment (FIG. 9A) and a notification state when security communication is being executed (FIG. 9A). ) Is another example. 9B shows a normal state in which an image is displayed on the screen of the display in the receiver of the embodiment (FIG. 9B) and a notification state when security communication is being executed (FIG. 9B). ) Is a diagram showing still another example. 9C shows a normal state in which an image is displayed on the screen of the display in the receiver of the embodiment (FIG. 9C) and a notification state when security communication is being executed (FIG. 9C). ) Is another example. 9D shows a normal state in which an image is displayed on the screen of the display in the receiver of the embodiment (Fig. 9D) and a notification state when security communication is being executed (Fig. 9D). ) Is a diagram showing still another example. FIG. 10 is a diagram showing 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 shows an example of an error occurrence factor when an error occurs in security communication and an error message for the error in the receiver of the embodiment. FIG. 12 is a diagram showing an example of the structure of the logical plane of the receiver. FIG. 13 is an example showing the relationship between decoding the data received by the receiver 100 and creating the presentation screen. FIG. 14 shows an example of controlling the display position when the 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 the 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 broadcasting station 300 transmits a broadcast signal by radio waves (in this specification, any broadcast wave signal such as BS digital broadcasting, wideband CS digital broadcasting, advanced BS digital broadcasting, advanced wideband CS digital broadcasting, and terrestrial digital television broadcasting). Send out. In addition, the broadcasting station 300 sends out digital broadcasting signals, application control information, control information related to presentation, etc., and also provides metadata about the program to the service provider device (sometimes referred to as a service provider) 20 based on a contract. And video content can be provided.

The application control information includes not only the application linked with the program is made known to the receiver corresponding to this system, but also commands for starting / ending, control information, and the like.

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

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

In addition, the broadcasting station 300 can exchange data with the service provider device 20 having a hybrid cast specification. That is, the broadcasting station 300 can provide the service provider device 20 with metadata and moving image contents related to the program based on the contract.
<Service provider device 20>
The service provider device 20 includes a server 21 for each service and an application database 22. The service provider device 20 is used by the service provider to provide the receiver 100 with a service by communication via a network such as the Internet, to create and distribute contents and applications, 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 serve as a platform provider such as a broadcasting station or VOD service.

Further, the service provider device 20 does not necessarily have to be limited to the API when accessed from the receiver 100 which is a user.

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

Further, the server 21 for each service includes a repository. The repository is registered for distributing the applications of this system, and it is possible to provide or search a list of available applications in response to inquiries from the receiver.
<Receiver 100>
The receiver 100 includes a parabolic antenna that receives a signal from a satellite (for BS digital broadcasting or wideband CS digital broadcasting) and a terrestrial antenna that receives a broadcast wave of a terrestrial digital television method. The receiver 100 can receive the broadcast signal sent from the broadcasting station 300 and receive various broadcast programs and various service information by broadcasting.

The receiver 100 can also receive a service from the service provider 20 by communication via a network such as the Internet. Broadcasting services and communication services may be linked.

A storage medium 31 for data recording / reproduction can be connected to the receiver 100, and a display 172 and a speaker system 174 can also be connected (these may already 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 for fixing the display 50.
<Mobile terminal 700>
The mobile terminal 700 can perform mutual communication with the receiver 100 by a communication function. Further, the mobile terminal 700 can also perform mutual communication with the service provider device 20 by the communication function. The mobile terminal 700 includes, for example, a smart phone, a tablet PC terminal, and the like.

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

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

The 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 by 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 is transmitted from the antenna by broadcast radio waves.

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

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

FIG. 3A is a configuration diagram showing in detail the basic functional unit of the television receiver 100. The television receiver 100 includes a terrestrial digital tuner 101 for receiving terrestrial digital television broadcasting, a BS tuner 102 for receiving BS digital broadcasting, and a CS tuner 103 for receiving wideband CS digital broadcasting. Application control information / service data / control data is multiplexed and transmitted from the broadcasting station via the broadcast wave transmission line 400 shown above, in addition to contents such as a video stream, an audio stream, and a data broadcasting stream. Come on.

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 BS digital broadcasting is received, the broadcasting signal is received by the BS tuner 102, and the stream of the channel selected from the received broadcasting signals is sent to the 2K decoder 131, the 4K decoder 132, or the 8K decoder 133. Entered. Regarding the 8K decoder 133, there may be a television receiver that is not equipped with the 8K decoder 133.

When a wideband CS digital broadcast is received, the broadcast signal is received by the CS tuner 103, and the stream of the 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 decoded output of any of the 2K decoder 121, 2K decoder 131, 4K decoder 132, 8K decoder 133, 2K decoder 141, or 4K decoder 142 on the display 172 or outputs from the speaker 174. Switch the path to do so. The decoded output selected by the selector 150 is input to the content processing unit (including the 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, brightness adjustment, volume adjustment, subtitle display on / off control, and the like.

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

Depending on the receiver (for example, a device not provided with the 8K decoder 133), a display 172 having an ability to display up to 4K pixels and having an ability adapted to this ability may be installed.

The control unit 180 includes a network I / F181, a mobile terminal cooperation I / F182, a remote controller I / F183, an application control unit 184, and the like.

The network I / F181 is used when receiving services by communication such as network service information and online distribution video via a network such as the Internet. The mobile terminal cooperation I / F182 is used when communicating with a mobile terminal. The remote controller I / F 183 is used to receive various commands from the remote controller 200.

The application control unit 184 controls the entire processing related to the communication service. The application control unit 184, for example, performs protocol control for receiving a communication service.

Further, the control unit 180 controls the graphic user I / F (GUI) 191 and uses the graphic user I / F 191 and the display signal output unit 171 to, for example, a program guide, various messages, and a user using a screen. It is possible to output a user interface image for giving operation input.

Furthermore, in the security communication described later, 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, and displays, for example, The security communication status can be displayed so as not to overlap the display contents displayed on the display screen of the device 172, and a control signal for controlling an indicator provided on the frame of the display device 172 can be output, for example. ..

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

Further, in response to the operation of the remote controller 200, the control unit 180 controls each of the tuners, each decoder, the selector 150, and the like described above, and executes the channel selection determination of the 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 according to a protocol controlled by the application control unit 184, for example, control information acquired by HTTP, or operates the application according to an input operation from the user input via GUI191.

FIG. 3B shows the protocol stack included in the receiver 100. The receiver 100 includes a protocol for realizing a broadcasting 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 the protocol required to receive the communication service.

The mobile terminal cooperation I / F182 is an interface for executing cooperation with an external mobile terminal.

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

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

Reference numeral 180j is a security operation detection unit that detects that the security function is operating. The security operation detection unit 180j detects whether or not 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 the security operation detection unit 180j detects that security communication is set in the protocol control performed by the application control unit 184, the security operation detection unit 180j notifies the display control unit 180k of the security operation detection notification.

The security communication performed by the application control unit 184 is, for example, when https is set in the scheme (ARIB TR-B39 1.0 version, Volume 3, Chapter 6, Communication Operation Table 6-1). If https is set in the scheme, it is desirable to follow TLS1.2 security, but other encrypted communication technologies may be used.

Further, the security operation detection unit 180j detects whether or not 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 the security operation detection unit 180j detects 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 the error occurrence notification and the error cause.

The display control unit 180k has a presentation function (ARIB STD-B62 5.2) that displays a video to be displayed based on the service by broadcasting and a video to be displayed based on the service by communication on the display 50 of the display 172. (Corresponding to the presentation function described in) is controlled. Further, the display control unit 180k responds to the security operation detection notification sent from the security detection unit 180j, and displays the video and multimedia contents in full screen to the user (viewer), and the video and multimedia are displayed. The display indicating that the security communication is being executed is displayed on the media content so that the display indicating that the security communication is being executed does not cause a problem as much as possible.

As will be described later, the display in which the security communication is being executed may be displayed on the display 50 of the display 172, a method of displaying on a frame 51 arranged around the display 50, or the like.

Furthermore, the display control unit 180k displays an error occurrence message (may be referred to as an error message) on the display 50 in an easy-to-understand manner for the user in response to 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, etc. that are different from the video / audio content.

Further, the control unit 180 includes a tuner control unit 180s, a decoder control unit 180t, a content processing control unit 180u, and output control units 180v such as audio output.

The tuner control unit 180s operates for selecting and switching the tuner and selecting and switching the channel. The decoder control unit 180t operates for selecting and switching various decoders. The content processing control unit 180u outputs a control signal related to the content (video, audio, subtitle display, etc.).

Each output control unit 180v selects the output form of the audio signal (stereo output, monaural output, 5-channel output, etc.) and the output form of the video signal (selection of 8K, 4K, 2K output, frame frequency, etc.). .. Therefore, each output control unit 180v has audio system type information (stereo, monaural, number of channels, etc.), display capability information of the connected display (8K, 4K, 2K, etc. pixel number information, applicable frame frequency). Information etc.).

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

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

In FIG. 5, the display 172 when the security operation detection unit 180j and the display control unit 180k are operated is shown from the viewpoint of the viewer. The example of FIG. 5A shows a normal state in which the image 50p (multimedia plane) is displayed on the display 50 of the display 172 in the receiver 100, and FIG. 5B shows the normal state in the receiver. An example of the state of notifying the execution of security communication when security communication is being executed is shown. As shown in FIG. 5B, in this embodiment, an indicator 52 including, for example, a plurality of light sources 52a, 52b, ... 52d is provided in a part of the frame 51 of the display 172. The name of the indicator 52 is not limited, and the indicator 52 may be any light source or brightness that can visually capture the change of state. The plane will be described with reference to FIGS. 12 to 14.

The light sources 52a, 52b, ... 52d are normally turned off, and when security communication is being executed, the light sources 52a, 52b, ... 52d are cyclically turned on in sequence.
This allows the viewer to visually capture the change. When the light sources 52a, 52b, ... 52d are turned on cyclically, the cyclic speed may be different depending on the type (for example, importance) of the security communication. Further, the plurality of light sources may have different colors, and different colors may blink depending on the type (for example, importance) of the security communication.

The number of light sources may be one, and is usually off, but may be blinking or lit when security communication is being executed.

In the example of FIG. 5B, indicators 52 (light sources 52a, 52b, ... 52d) are 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 may be selected at various positions such as a lower part, an upper part, a right part, and a corner portion of the frame 51. .. The advantage of providing the indicator 52 on the frame 51 is that notifying that security communication is being executed by superimposing the video or multimedia content displayed on the display, for example, hides the advertisement display depending on the display content. There is also a risk, and the problem can be solved by notifying outside the display 50.

FIG. 6A shows another example of the notification state when security communication is being executed in the receiver of the embodiment. In this example, the indicators 52 (light sources 52a, 52b, 52c) are arranged in a part of the lower side of the frame 51, for example, in the left and right central regions. Also in this example, the plurality of light sources may have different colors, and different colors may blink depending on the type of security communication (for example, importance). Here, it is a case where some users want to know that security communication is in progress, and it is desirable to place it in the most prominent position, that is, in the central area on the left and right. Ergonomically, it is said that the human visual range is biased toward the center of the display screen.

FIG. 6B shows another example of the state in which the receiver of the embodiment notifies that the security communication is being executed when the security communication is being executed. This example is an example in which the indicators 52 (light sources 52a, 52b, 52c) are provided at a place 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 linking with the mobile terminal 700 by mutual communication. Therefore, for example, a control signal may be transmitted to a mobile terminal 700 (smart phone, tablet PC, etc.) registered in the receiver to display the indicator 52. Further, the remote controller 200 may be provided with the indicator 52. In this case, the remote controller 200 has a receiving function for intercommunication with the television receiver 100.

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

FIG. 7 shows still another example of the notification state on the display when security communication is being executed in the receiver of the embodiment. In this example, a recess 53 is provided on the end surface (which may be referred to as a thickness surface) 51b of the 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 while the security communication is being executed, the viewer can be made to recognize it without any hindrance.

This embodiment may be the end face of the side of the frame 51 if the user is not very interested in the security communication and conversely wants to be installed in an inconspicuous position.
Further, either the embodiment shown in FIGS. 6A to 6C or the embodiment shown in FIG. 7 may be selected at the time of initial setting. When the indicator 52 is provided as in the case of indirect lighting, it is not limited to the embodiment shown in FIG. 7, and it goes without saying that various embodiments can be implemented. For example, a plurality of light sources are used, and various positions can be selected for the position of the indicator.

FIG. 8 shows still another example of the notification state on the display when security communication is being executed in the receiver 100 of the embodiment. In this example, a connector mechanism is provided on the end surface (which may be referred to as a thickness surface) 51b of the side portion of the frame 51. The plug 54 is inserted into the connector socket. Therefore, in this embodiment, a light source 52y such as an LED is provided on 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 in the entire area of the display 50 of the display 172 in the receiver 100 of the embodiment, and a video in which security communication is executed. 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 executed, the size of the image 50p (multimedia plane) is reduced from the size of the display 50, and the image 50p (multi) is used. The media plane) is displayed on the display 50 without being lost. In the process of reducing the image 50p (multimedia plane), the display control unit 180k displays on the display 50 according to the security operation detection notification sent from the security operation detection unit 180j that has detected that security communication is being performed. This is done by controlling the size of the multimedia plane.

When the image 50p (multimedia plane) is reduced and displayed with respect to the area of the display 50, there is a remaining portion in the area of the display 50 where the image 50p (multimedia plane) is not displayed. This remaining portion is displayed in black, for example. A security-related message 55 is displayed in the black display area via GUI191. For example, a display such as "Data is being updated now" is displayed.

In the above example of FIG. 9A (b), black areas are generated at the top, bottom, left and right of the screen due to the reduction of the image 50p (multimedia plane), but the present invention is not limited to this. A black area may be prepared in one of the top, bottom, left, and right directions of the screen, and a security-related message may be displayed in this area.

FIG. 9B shows the normal state (FIG. 9B (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, and the image in which security communication is executed. Another example of the display notification state (FIG. 9B (b)) in which 50p (multimedia plane) is reduced on the display 50 is shown. However, in this example, the broadcast screen 50A by radio wave broadcasting and the communication screen 50B by data broadcasting are simultaneously displayed on the video 50p (multimedia plane). That is, the broadcast screen and the communication screen are displayed at the same time. As shown in FIG. 9B (b), in this embodiment, when security communication is being executed, the size of the video (multimedia plane) of the broadcast screen 50A and the communication screen 50B is reduced from the size of the display 50. In this state, the images (multimedia plane) of the broadcast screen 50A and the communication screen 50B are displayed on the display 50 without being lost.

When the images (multimedia plane) of the broadcast screen 50A and the communication screen 50B are reduced and displayed with respect to the area of the display 50, the images of the broadcast screen 50A and the communication screen 50B (multimedia plane) are displayed in the area of the display 50. There is a residual part that is not displayed. This remaining portion is displayed in black, for example. A security-related message 55 is displayed in the black display area via GUI191. For example, a display such as "Data is being updated now" is displayed. In this case as well, black areas are shown at the top, bottom, left and right of the screen, but the present invention is not limited to this. A black area may be prepared in one of the top, bottom, left, and right directions of the screen, and a security-related message may be displayed in this area.

FIG. 9C shows the 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, and the image in which security communication is executed. Yet another example of the display notification state (FIG. 9C (b)) in which 50p (multimedia plane) is reduced on the display 50 is shown. In this example, as in FIG. 9B, the video 50p (multimedia plane) displays the broadcast screen 50A by radio wave broadcasting and the communication screen 50B by data broadcasting at the same time, but nothing is displayed on the display 50. This is an example in which the area 50C is present. In the display layout 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). On the other hand, the security-related message 55 is displayed via GUI191. For example, a display such as "Data is being updated now" is displayed.

In FIG. 9D, security communication is executed with the normal state (FIG. 9D (a)) in which the image 50p (multimedia plane) is displayed in the remaining area of the display 50 of the display 172 in the receiver of the embodiment. It is a figure of still another example which shows the display notification state (FIG. 9D (b)). This example is also an example in which the broadcast screen 50A by radio wave broadcasting and the communication screen 50B by data broadcasting are displayed at the same time. That is, the broadcast screen and the communication screen are displayed at the same time. Under such circumstances, 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. May be displayed, or the indicator 52 provided on a stand or the like, which is a place different from the frame 51, may be blinked and lit to indicate that security communication is in progress.

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 security communication, it is preferable to notify the user. Therefore, in this embodiment, when an error occurs, an error message 60 is displayed on the screen while the video and multimedia contents are displayed on the screen. In the example of FIG. 10, as an embodiment for notifying the security communication status, an example of the embodiment is shown in FIG. 6, but any of the embodiments shown in FIGS. 5, 7, 8, 9A-9D. Or, you may combine the display example of the error message 60 of FIG.

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

FIG. 11 shows an example of the cause of the error and the 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 showing an example of a logic 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 planes include character superplanes that display superimposes, subtitle planes that display subtitles, multimedia planes that display monomedia alone such as broadcast video, or multimedia planes that combine multimedia applications, and backgrounds that display background colors. There is a plane.

The receiver 100 creates each plane based on the data transmitted by broadcasting or communication, and synthesizes the created planes to form a screen to be presented on the display 50.

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

Each stream 1301 received as a broadcast stream or a communication stream is separated by the decoder control unit 180t, and the decoding process is performed (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 the presentation process. The display control unit 180k constitutes a screen to be presented on the display 50 of the display 172 by performing a presentation process of changing the color gamut and the dynamic range of the created planes as necessary and synthesizing them.

In order to display the screen to be presented on the display 50, the display control unit 180k specifies a display position which is a layout on the display and displays the presentation screen on the display 50.

FIG. 14 shows an example of controlling the display position when the display control unit 180k displays the created screen to be presented on the display 50. FIG. 14A is 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 presented by the display control unit 180k is displayed in the entire area of the display 50. FIG. 14B is 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 the coordinate system (physical coordinates) on the display 50. The area of the screen to be presented displayed in this display area is a rectangular area having the coordinate system (coordinates in the plane) of the plane of the screen to be presented and having (0, 0) and (7679, 4319) as vertices on the diagonal line. ..
That is, it is the entire area of the presentation screen. The entire area of the screen presented thereby is reduced and displayed in a rectangular area having (0, 0) and (5759, 3239) as diagonal vertices in the coordinate system on the display 50. The display area of the display 50 is set to (0, 0) to (7679, 4319) as the coordinate system on the display. Examples of this reduced presentation screen correspond to the examples of FIGS. 9A (b) and 9B (b).

According to this embodiment, the characteristic parts can be summarized in various forms as follows. In the above embodiment, it is described that TLS is adopted for security communication, but the present invention is not limited to this, and it goes without saying that other encryption techniques may be used.

According to the present embodiment, the receiver includes a video signal processing unit, a display, and a communication unit, and controls for detecting security communication based on transport layer security (TLS) via the communication unit. Has a part
If there is no error in the curity communication, the control unit displays a notification on the display screen of the display to notify that the security-related function is operating.
(A00) A receiver including a video signal processing unit, a display, and a communication unit, and having a control unit that detects security communication based on transport layer security (TLS) via the communication unit. And
The control unit
When there is no error in the curity communication, a receiver that displays a notification notifying that a function related to security is operating outside the display screen of the display.
(A11) A receiver including a video signal processing unit, a display, and a communication unit.
It has a control unit that detects security communication based on transport layer security (TLS) via the communication unit.
The control unit
If there is no error in the security communication, a notification display indicating that the security-related function is operating is displayed outside the display screen of the display, and the location of the notification display is the screen of the display screen. A receiver that is within the display area of the display in a state where the area is a reduced display screen, and is the remaining portion in the display area around the reduced display screen.
(A12) In the above A11, the display screen displays a video by broadcasting and / or multimedia contents by data broadcasting.
(A13) In A11, the display screen is composed of a plurality of overlapping planes, and images arranged on each plane are managed.
(B11) A receiver including a video signal processing unit, a display, and a communication unit.
It has a control unit that detects security communication based on transport layer security (TLS) via the communication unit.
The control unit
If there is no error in the security communication, a notification display indicating that the security-related function is operating is displayed outside the display screen of the display, and the location of the notification display is the frame of the display. And the receiver.
(B12) In the above B11, the display screen displays a video by broadcasting and / or multimedia contents by data broadcasting.
(B13) In B11, the display screen is composed of a plurality of overlapping planes, and images arranged on each plane are managed.
(C11) A receiver including a video signal processing unit, a display, and a communication unit.
It has a control unit that detects security communication based on transport layer security (TLS) via the communication unit.
The control unit
If there is no error in the security communication, a notification display indicating that the security-related function is operating is displayed outside the display screen of the display, and the location of the notification display is the frame of the display. The position is different from
Receiving machine.
(C12) In C11, the display screen displays a broadcast video and / or data broadcast multimedia content.
(C13) Further, the display screen is composed of a plurality of overlapping planes, and images arranged on each plane are managed.
(D21) A receiver including a video signal processing unit, a display, and a communication unit.
It has a control unit that detects security communication based on transport layer security (TLS) via the communication unit.
The control unit
If there is no error in the curity communication, a notification display indicating that the security-related function is operating is displayed outside the display screen of the display, and the location of the notification display is the screen of the display screen. The remaining part in the display area around the reduced display screen within the display area of the display in a state where the area is a reduced display screen.
If there is an error in the curity communication, a message indicating that the error has occurred is displayed on the display screen.
Receiving machine.
(D22) In the D21, the display screen displays a broadcast video and / or a data broadcast multimedia content.
(D23) Further, the display screen is composed of a plurality of overlapping planes, and images arranged on each plane are managed.
(E21) A receiver including a video signal processing unit, a display, and a communication unit.
It has a control unit that detects security communication based on transport layer security (TLS) via the communication unit.
The control unit
If there is no error in the security communication, a notification display indicating that the security-related function is operating is displayed outside the display screen of the display, and the location of the notification display is the frame of the display. age,
If there is an error in the security communication, a message indicating that the error has occurred is displayed on the display screen.
Receiving machine.
(E22) In the E21, the display screen displays a broadcast video and / or a multimedia content by data broadcasting.
(E23) Further, the display screen is composed of a plurality of overlapping planes, and images arranged on each plane are managed.
(F21) A receiver including a video signal processing unit, a display, and a communication unit.
It has a control unit that detects security communication based on transport layer security (TLS) via the communication unit.
The control unit
If there is no error in the security communication, a notification display for notifying that the security-related function is operating is displayed outside the display screen of the display, and the location of the notification display is the display of the display. It is in a different position from the frame,
If there is an error in the curity communication, a message indicating that the error has occurred is displayed on the display screen.
Receiving machine.
(F22) In the F21, on the display screen, a video by broadcasting and / or multimedia contents by data broadcasting are displayed.
(F23) Further, the display screen is composed of a plurality of overlapping planes, and images arranged on each plane are managed.
(G11) A receiver including a video signal processing unit, a display, and a communication unit.
It has a control unit that detects security communication based on transport layer security (TLS) via the communication unit.
The control unit
If there is no error in the security communication, a notification display indicating that the security-related function is operating is displayed outside the display screen of the display, and the location of the notification display is the frame of the display. And the receiver near the center of the left and right in the lower part of the frame.
(G12) In the G11, the display screen displays a video by broadcasting and / or multimedia contents by data broadcasting.
(G13) Further, the display screen is composed of a plurality of overlapping planes, and images arranged on each plane are managed.
(H41) Further, the following can be subordinated to 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 at the center of the lower part of the frame.
(d) A plurality of the light sources are provided in the lower portion of the frame,
(e) Equipped with TLS1.2,
(f) Communication using "https: ...", etc., or a plurality of them can be combined.
(A11) A receiving method of a receiver including a video signal processing unit, a display, a communication unit, and a control unit.
Obtain a security communication detection signal based on transport layer security (TLS),
When responding to the security communication detection signal,
If there is no error in the curity communication, a notification is displayed outside the display screen of the display to notify that the security-related function is operating, and the location of the notification display is the screen of the display screen. The remaining part in the display area around the reduced display screen within the display area of the display in a state where the area is a 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.
Obtain a security communication detection signal based on transport layer security (TLS),
When responding to the security communication detection signal,
If there is no security communication error, a notification display indicating that the security-related function is operating is displayed outside the display screen of the display, and the location of the notification display is the frame of the display. To 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.
A security communication detection signal based on transport layer security (TLS) is obtained via the communication unit.
When responding to the security communication detection signal,
If there is no security communication error, a notification display is displayed outside the display screen of the display to notify that the security-related function is operating, and the location of the notification display is the frame of the display. The position is 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.
A security communication detection signal based on transport layer security (TLS) is obtained via the communication unit.
When responding to the security communication detection signal,
If there is no error in the curity communication, a notification is displayed outside the display screen of the display to notify that the security-related function is operating, and the location of the notification display is the screen of the display screen. The remaining part in the display area around the reduced display screen within the display area of the display in a state where the area is a reduced display screen.
If there is an error in the curity communication, a message indicating that the error has occurred is displayed on 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.
A security communication detection signal based on transport layer security (TLS) is obtained via the communication unit.
When responding to the security communication detection signal,
If there is no security communication error, a notification display indicating that the security-related function is operating is displayed outside the display screen of the display, and the location of the notification display is the frame of the display. ,
If there is an error in the security communication, a message indicating that the error has occurred is displayed on 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.
A security communication detection signal based on transport layer security (TLS) is obtained via the communication unit.
When responding to the security communication detection signal,
If there is no security communication error, a notification display is displayed outside the display screen of the display to notify that the security-related function is operating, and the location of the notification display is the frame of the display. In a different position from
If there is an error in the curity communication, a message indicating that the error has occurred is displayed on 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.
A security communication detection signal based on transport layer security (TLS) is obtained via the communication unit.
When responding to the security communication detection signal,
If there is no security communication error, a notification display indicating that the security-related function is operating is displayed outside the display screen of the display, and the location of the notification display is the frame of the display. And near the center of the left and right in the lower part of the frame,
The receiving method of the receiver.
<Further explanation about security>
In services that use communication functions, security functions may be required when providing services that require consideration of the transmission and reception of viewer information and fairness. The security functions required at that time include (a) simple mutual authentication function, (b) information protection function, (c) falsification prevention function, and (d) simple certification function.
(A) Simple mutual authentication function When using an application that requires privacy protection or confirmation of being a regular viewer in communication, it is necessary to confirm the connected party / destination at the initial stage of the transaction. As the means, a mutual (other party) authentication function is used.

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

In the above-mentioned communication text restoration method, mutual authentication is also possible between the sender of the information (communication text) and the receiver of the information (communication text). A card ID, a pseudo-random number, and a time stamp are used for encryption, and a communication message is created on the transmitting side. In order to decipher this, the sender and the receiver need a common key for each other. The common key held by the sender is encrypted and sent to the receiver as a common key cryptosystem by a route different from the encrypted information (communication message).

If the sender / receiver (verifier) shares a common key in advance, it is meaningful when the sender encrypts the communication text using the common key and the receiver decrypts the ciphertext. You can be sure of the sender when it comes to a certain message. If a meaningful message cannot be obtained, it means that there was falsification or transmission error.
(B) Information protection In a service using a communication function, it may be necessary for the service provider to know the name and address of the viewer in order to specify the delivery destination as in shopping. In services that use such communication functions, it is desirable to consider the following in order to prevent leakage of viewer information from the viewpoint of privacy protection.
・ Prevention of eavesdropping on the network ・ Prevention of leakage inside the center ・ Prevention of entry into the center from the outside.
・ Handle only necessary personal data and do not use or transfer it for other purposes without the permission of the person.
・ As a function and operation that the center should perform
If it is unavoidable to connect to other networks such as the Internet when expanding the service content, try to prevent leakage of viewer information by installing a firewall.
(C) Falsification prevention function When there is falsification in the communication path, it is desirable to have a function to detect that falsification has been performed.
(D) Signature function When there is a transaction of money and goods (including digital contents) such as shopping online, it is necessary to leave evidence of both transactions in order to prevent troubles. In such a case, it is ideal to use a digital signature, but since a digital signature cannot be realized without implementing a public key cryptosystem, a message authenticator that can also be used in a system that implements only common key cryptography ( It is desirable to use MAC).
However, although it is certain that the signature result is not generated by a third party, the same message can be created by the signature recipient, so it has no effect on the evasion of the signature generator on the center side.

<Additional explanation on security>
In the communication transmission of multimedia service content, TLS is applied when the scheme is specified by "https:". It is expected that the security algorithm in TLS will be updated due to security issues. Therefore, when the security algorithm is updated, it is necessary to be able to update the security algorithm that operates in the browser by taking measures such as updating the receiver software.

The receiver is required to implement TLS1.2 and have a mechanism for encrypted communication by the public key cryptosystem (PKCS).

When an error occurs in the security communication, it is necessary to display the error message shown in FIG. 11 and surely inform the user that the security communication cannot be used. It is also possible to implement without executing communication when an error occurs in security communication.

The root certificate operated in security communication needs to be TLS 1.2 compliant and a certificate for performing encrypted communication by the public key cryptosystem (PKCS) must be available in the browser.

In addition, it is desirable that the receiver be equipped with a function to display the root certificate that can be used in the browser.

It is expected that a new root certificate will need to be operated due to the expiration date of the root certificate and the update of the security algorithm. Therefore, it is necessary to add a new root certificate in the browser by updating the receiver software.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

20 ... Service provider equipment,
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 department,
171 ... Display signal output unit,
172 ... Display,
173 ... Audio signal output unit,
180 ... Control unit,
180j ... Security motion detector,
180k ・ ・ ・ Display control unit,
185 ... Application engine,
186 ... Terminal control unit,
191 ... GUI,
200 ... remote controller,
300 ... Broadcasting station 700 ... Mobile terminal.

Claims (2)

The transmitter is
A transmission means for transmitting a broadcast wave including a video stream, an audio stream, a data broadcast stream, and application control information.
With
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 transmission means.
A content processing unit that processes the broadcast wave received by the receiving unit and outputs a video signal,
A display control unit that displays the video signal output by the content processing unit in full screen on the display screen of the display unit.
With the communication department
An application control unit that communicates via the communication unit based on the application control information received by the reception unit, and
It is a transmission / reception system equipped with
When the application control unit executes communication via the communication unit based on the application control information, the application control unit has a security operation detection unit that detects a communication state of security communication based on transport layer security (TLS).
The display control unit further
When the communication state detected by the security operation detection unit is the execution of the security communication, the security communication is being executed with the video signal displayed in full screen on the display screen of the display. Is displayed in a frame located around the display screen so that the display of the above is not overlapped with the full screen display.
Further, when the communication state detected by the security operation detection unit is a state in which an error occurs during execution of the security communication,
If the cause of the error is that 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 an authentication processing error of a line failure, the fact that the connection could not be established within the set time is displayed superimposed on the full screen display.
If the cause of the error is a mismatch in the common name of the server certificate, the connection destination certificate does not include the name of the page you are trying to display, and you cannot connect because the security of the connection destination cannot be confirmed. , Overlay on the full screen display
Transmission / reception system. The transmitter is
A transmission means for transmitting a broadcast wave including a video stream, an audio stream, a data broadcast stream, and application control information.
With
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 transmission means.
A content processing unit that processes the broadcast wave received by the receiving unit and outputs a video signal,
A display control unit that displays the video signal output by the content processing unit in full screen on the display screen of the display unit.
With the communication department
An application control unit that communicates via the communication unit based on the application control information received by the reception unit, and
It is a transmission / reception system equipped with
When the application control unit executes communication via the communication unit based on the application control information, the application control unit has a security operation detection unit that detects a communication state of security communication based on transport layer security (TLS).
The display control unit further
When the communication state detected by the security operation detection unit is the execution of the security communication, the security communication is being executed with the video signal displayed in full screen on the display screen of the display. Is displayed in a frame located around the display screen so that the display of the above is not overlapped with the full screen display.
Further, when the communication state detected by the security operation detection unit is a state in which an error occurs during execution of the security communication,
If the cause of the error is that 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 an authentication processing error of a line failure, the fact that the connection could not be established within the set time is displayed superimposed on the full screen display.
If the cause of the error is a mismatch in the common name of the server certificate, the connection destination certificate does not include the name of the page you are trying to display, and you cannot connect because the security of the connection destination cannot be confirmed. , Overlay on the full screen display
Send / receive method .

Images