JP4549092B2 - Broadcast receiver - Google Patents

Description

  The present invention relates to a broadcast receiver, an analog broadcast receiver capable of receiving analog broadcasts, a digital broadcast receiver capable of receiving digital broadcasts, and an analog / digital broadcast receiver capable of receiving both analog broadcasts and digital broadcasts. Including.

  EIA-608 for analog broadcasting specified in EIA-608 standard of EIA (Electronic Industries Alliance) is a North American system for visually handicapped persons using the 21st vertical blanking interval (VBI) of NTSC. There are eight types of services that can be selected from CC1, CC2, CC3, CC4, TEXT1, TEXT2, TEXT3, and TEXT4. For digital broadcasting, the EIA-708 standard with newly enhanced functions is defined, and the number of services that can be selected is greatly increased to 63 types at the maximum.

In addition, the EIA-708 standard specifies that at least six services should be switched, and EIA-608 requires at least four services to be switched in North America. Therefore, the total of these is (6 + 4) services. It is common for analog / digital broadcast receivers to use a switching mode of narrowing down and selecting from a menu.
In digital broadcasting, there are a maximum of 63 types of services. Therefore, in “METHOD OF SELECTING A DIGITAL CLOSED CAPTIONING SERVICE” in US Pat. No. 6,320,621 B1 of Patent Document 1, EIA-708 A device for a selection method by a standard menu has also been proposed.
US Patent Publication [US 6,320,621 B1]

  In actual broadcasting, as Closed Caption data, there are still few services conforming to the EIA-708 standard for digital broadcasting, and even analog broadcasting that conforms to the EIA-608 standard for analog broadcasting can be transmitted. The service is mainly broadcast, and it is necessary to decode Closed Caption data of both EIA-708 standard and EIA-608 standard.

In addition, switching between at least 6 services in the EIA-708 standard and at least 4 services in the EIA-608 standard is essential in North America. When selecting from both the EIA-708 and EIA-608 standards, a total of at least 10 services is required. It must be possible to switch from among them. If at least 10 services are selected from the menu, it is not possible to select when a service other than the 10 services is broadcast, and the services are sequentially toggled using the toggle switch button for switching, including OFF. In the case of switching (switching one by one for each button operation (pressing the button), for example, switching from 1 → 2 → 3 → 4 →... → n → OFF → 1) , for example, one In order to switch to the previous service, it is necessary to press the button at most 10 times (n = 10) , which is not convenient.

  The present invention has been made in view of such circumstances, and instead of providing a service switching means that is fixed and selected in advance as at least 10 types of services, both the EIA-708 standard and the EIA-608 standard are provided. Each currently broadcast service is determined, and as a service switching means, only a currently broadcast service is used, and an arbitrary service can be selected from the services, and a Closed Caption switching interface that is easier to use. The purpose is to provide.

In order to solve the above problems, the following technical means are included.
According to a first technical means, in a broadcast receiver capable of receiving an analog broadcast, EIA-608 Closed Caption (hereinafter abbreviated as EIA-608CC) data conforming to the EIA-608 standard is used as a vertical blanking period (VBI) of an analog broadcast signal. EIA-608CC data extracting means extracted from (1), EIA-608CC decoding means for decoding the extracted EIA-608CC data, and a service code for identifying the service included in the decoded EIA-608CC data, Service determining means for determining and registering each service of EIA-608 currently being broadcast, and determining that the service that has been broadcast has shifted to a state where it is no longer broadcast, and the service that has been determined to be no longer broadcast Registered by the service determination means Service switching for selecting and switching one of the services using only the service deletion means for deleting from the currently broadcast service and the currently broadcast EIA-608 registered in the service determination means. And a switching means for switching only the currently broadcasted service in order for each operation .

According to a second technical means, in the broadcast receiver according to the first technical means, when the service judging means judges and registers each service of EIA-608 currently broadcast, the decoded EIA -608CC not only the service code included in the data, it is determined whether or not contain data with drawing in the EIA-608CC data decoded, if it contains data with drawing Is characterized in that it is determined and registered as a currently broadcast service.

The third technical means extracts data of EIA-708 Closed Caption (hereinafter abbreviated as EIA-708CC) compliant with the EIA-708 standard from a transport stream of a digital broadcast signal in a broadcast receiver capable of receiving digital broadcasts. EIA-708CC data extraction means, EIA-708CC decoding means for decoding the extracted EIA-708CC data, service packets included in the decoded EIA-708CC data are extracted, and service information of the service packets is determined. The service determining means for determining and registering each service of the EIA-708 currently broadcasted, and determining that the service that was being broadcast has shifted to a state where it is no longer broadcast, and determined that the service is no longer broadcast Service, said service Any one of the services is deleted by using only the service deletion means for deleting from the currently broadcast service registered by the determination means and the currently broadcast EIA-708 registered in the service determination means. And a service switching means for selecting and switching, and as the service switching means, a switching means for switching only the currently broadcast service in order for each operation is used .

According to a fourth technical means, in the broadcast receiver according to the third technical means, when the service judging means judges and registers each service of EIA-708 currently broadcast, the decoded EIA -708CC not only service information of the service packet included in the data, it is determined whether or not contain data with drawing in the EIA-708CC data decoded, contains data with drawing If it is, the service is judged and registered as a currently broadcast service.

According to a fifth technical means, in a broadcast receiver capable of receiving both an analog broadcast and a digital broadcast, data of EIA-608 Closed Caption (hereinafter abbreviated as EIA-608CC) compliant with the EIA-608 standard is converted into an analog broadcast signal. and EIA-608CC data extracting means for extracting vertical blanking interval (VBI) or al, and EIA-608CC decoding means for decoding the extracted EIA-608CC data, EIA-708 standard compliant EIA-708Closed Caption (hereinafter, EIA- EIA-708CC data extracting means for extracting data from the transport stream of the digital broadcast signal, EIA-708CC decoding means for decoding the extracted EIA-708CC data, and decoded EIA-608 The service code specifying the service included in the C data is determined, the service packet included in the decoded EIA-708CC data is extracted, the service information of the service packet is determined, and the current broadcast The service determination means for determining and registering each service of the EIA-608 currently being broadcast and each service of the EIA-708 currently being broadcast, and the fact that the service that has been broadcast has shifted to a state in which the service is no longer broadcast A service deletion unit that deletes the service that has been determined to be no longer broadcast from the currently broadcast service that has been registered by the service determination unit; and the currently broadcast EIA that is registered in the service determination unit -608 services and EIA-708 services only, A service switching means for switching to select the Zureka, as said service switching means, characterized in that it uses switching means going switch only the order service that the currently broadcasted for each operation.

According to a sixth technical means, in the broadcast receiver according to the fifth technical means, the service determining means includes each service of EIA-608 currently broadcast and each service of EIA-708 currently broadcast. when you register to determine the bets, not only the service code included in the EIA-608CC data decoded, determines whether or not contain data with the drawing in EIA-608CC data decoded and, also, to determine whether not only the service information of the service packet included in the EIA-708CC data decoded includes data accompanying drawing in EIA-708CC data decoded, rendered if it contains any data with is characterized by registering to determine the services that are currently broadcast

The seventh technical means is the broadcast receiver described in the fifth or sixth technical means, wherein the broadcast switching means for switching between analog broadcasting and digital broadcasting and the current broadcast registered by the service determining means are being broadcast. from among each of the services of the EIA-708 for each service and for digital broadcasting of EIA-608 for analog broadcasting, the service have close to the service currently selected by the switching means EIA-608 service and EIA-708 Service acquisition means for discriminating and acquiring each service, and when the broadcast switching means switches between analog broadcast and digital broadcast, the analog broadcast applied to the switched analog broadcast or digital broadcast EIA-608 services for digital broadcasting or EIA-708 for digital broadcasting Of either-bis, and switches that is closer to the service to the service of the currently selected acquired by the service acquisition means.

According to an eighth technical means, in the broadcast receiver according to any one of the first to seventh technical means, a toggle switching button having a switching structure for switching in order for each operation is used as the service switching means. It is characterized by.

A ninth technical means, wherein the broadcast receiver according to any technical means of the first to eighth, service loss determination means service was broadcast is determined that a transition to a state where Tsu no longer being broadcast When, from among the services currently being broadcast registered by the service determination unit, and a approximate service determining means for acquiring to determine the near-have service to the service currently selected by said service switching means, wherein when a customer in the currently selected in the service loss determination means has determined that Tsu no longer being broadcast, and switches to the close service acquired by the approximate service determination unit.

The tenth technical means is obtained by the approximate service determining means in the broadcast receiver according to the ninth technical means, when the currently selected service that is no longer broadcast is revived and broadcast is resumed. from a state where the has been switched to close the service, which is characterized in that the switching back automatically to the service of the currently selected that is resumed.

First first technical means is the ninth or the broadcast receiver according to the first 0 of technical means, any service with Closed Caption service and TEXT of service for each service registered by the service determination unit comprising a service type determining means for determining whether the type, the approximate service determination unit, when obtaining to determine the near-have service to the service currently selected, the service currently selected were service Closed Caption in this case, the service type determination unit by discriminates only the the near service from among services discriminated Closed Caption, if the service currently selected were service TEXT, the service type determination wherein the near viewing from among services discriminated TEXT by means Wherein the determining-bis.

First and second technical means is the broadcast receiver according to the first first technical means, wherein when the approximation service determination unit obtains to determine the near have service to the service currently selected, the currently selected If the service of the service with the same service type in was in a state where all are waiting to no longer being broadcast, from among the services, which has become not be broadcast, set to determine a near-have service in the service of the currently selected It is characterized by doing.

The first third technical means is the broadcast receiver according to the first and second technical means, has been switched to the near have service set by the approximation service determination unit from among the services had no longer broadcast When the currently selected service that is no longer broadcast is resumed when it is in the state, or when the service of the same service type as the currently selected service that is no longer broadcast is started, from the state it has been switched to the near have services configured by approximation service determining means and automatically switching to the service or initiated the service of the same service type of the currently selected that is resumed.

Technical means of the first 4, in the broadcasting receiver according to any of the eighth to first third technical means, wherein the service loss determination means, the tuning of the broadcast channel to the change or non-broadcast channels input When the switching operation is determined, when it is determined that the broadcast is stopped, when it is determined that the program is changed due to the arrival of the start time or end time according to the program information, or when the service is When it is determined that the program has not been broadcast for a predetermined period of time, it is determined that the service has been lost because it has not been broadcast.

First fifth technical means is a broadcasting receiver according to any of the first through the first fourth technical means, at least, the service name of each service that is currently broadcasted registered by the service judgment unit and The language information used by the service and information indicating the service currently selected by the service switching means among the currently broadcast services are displayed.

Technical means of the first 6, the broadcast receiver according to any of the first to 1 4 technical means, at least, among the services currently being broadcast, the service currently selected by said service switching means The service name and / or language information used by the service is displayed.

Technical means of the first 7, the broadcast receiver according to the first 5 or technical means in the first 6, further also displays the total number of services currently being broadcast registered by the service determination unit It is characterized by that.

Technical means of the first 8, the broadcast receiver according to one of the first 5 to the first 7 technical means, further, in case of using the toggle switch button as said service switching means, said toggle It is characterized by displaying the switching order of button services.

Technical means of the 19, the broadcast receiver according to any technical means of the first 5 to the first 8, further services displayed as service currently selected, the current through the service switching unit not by a service selected, and in case is switched to the near have service to a service on the currently selected is switched to the current rather than the service being selected, prior KiKon have service by the service switching unit It is possible to display an identification display indicating this.

Second 0 technical means is a broadcasting receiver according to the nineteenth technical means, from the state has been switched before KiKon have services, cut to the state of the service in the current selected by said service switching means If it returned, and displaying delete the identification indicating that the switched before KiKon have service.

According to the present invention configured from any one of the technical means as described above, the following effects can be obtained.
A user interface that is easy to use can be obtained by discriminating the currently broadcast service and selecting and switching an arbitrary service from the effective services using only the currently broadcast effective services. It becomes possible to provide to the user, and a better Closed Caption switching means can be provided to the user.

  Also, when determining valid services currently being broadcast, it is also determined whether valid data for rendering Closed Caption data is received as well as service codes and service information indicating the service type of Closed Caption. Therefore, it is possible to provide a user interface that is more convenient to use.

Furthermore, it is possible to switch between analog broadcasting and digital broadcasting services that are close to the currently selected service by the same mechanism as switching between analog broadcasting and digital broadcasting, and a user-friendly user interface. It can be provided to the user.

Also, the user switches the channel selection, the broadcast stops and the broadcast synchronization signal cannot be detected, the broadcast program switches according to the start time and end time of the reserved program, or the video device broadcasts or switch to the input from the input devices other than, or, in the case where the service was broadcast have been set up to now has been or can not be received in over a certain period of time determined in advance, a service that was Tsu no longer being broadcast It is possible to delete the registration automatically as it is, and a user-friendly user interface that enables the user to select only services that can be actually selected and displayed as Closed Caption is provided to the user. Can be provided.

  In addition, since it is possible to limit the service to only valid services currently being broadcast and allow the user to select, for example, a toggle switching button that can be configured with a reasonable number of selection stages is used as the service switching means. In addition, it is possible to easily switch to a desired service with only one button, which not only improves operability but also saves space on the operation panel.

Moreover, even after the service selected is no longer broadcast, it is possible to switch to a different service have close to the service can view continues to Closed Caption data. In addition, even in a state where they watched to continue switching to another service have close to the services that are no longer being broadcast, when the broadcast of the service, which had been selected earlier is resumed, automatically, is resumed It is also possible to switch to return to a new service, and a user interface that is easy to use can be provided to the user.

  In addition, it is possible not to automatically switch the service across the Closed Caption service and the TEXT service, and it is possible to prevent the screen display form from being switched suddenly. In addition, the serviceability to the user can be improved.

  It is also possible to display a list of selectable services currently being broadcast and the currently selected service on the screen, allowing the user to easily check the service selection status, and an easy-to-use user interface. It can be provided to the user.

  It is also possible to display the total number of services currently being broadcast and the toggle switching order when switching services using the toggle switching button, and provide a user interface that is more convenient to use. Can do.

Furthermore, such as in the case of being displayed by switching to a different service have close to services that are no longer being broadcast, if the user is the Closed Caption display in non-selected service service, such services, It is possible to display that the user is in a temporary service setting state so that the user can easily understand, and an easy-to-use user interface can be provided to the user.

  An example of an embodiment of an analog / digital broadcast receiver according to the present invention will be described below with reference to the drawings. The broadcast receiver according to the present invention includes an analog broadcast receiver capable of receiving only analog broadcast, a digital broadcast receiver capable of receiving only digital broadcast, and an analog / digital broadcast receiver capable of receiving both analog broadcast and digital broadcast. In the following description, an analog / digital broadcast receiver capable of receiving both analog broadcast and digital broadcast will be described as an example.

  FIG. 1 is a functional block diagram showing an embodiment of an analog / digital broadcast receiver according to the present invention. In the analog / digital broadcast receiver 20 shown in FIG. 1, 1 is a remote control, 2 is an interface (hereinafter referred to as I / O) such as a remote control light receiving unit, and 3 is broadcast reception data or receiver-specific data. A rewritable nonvolatile memory (hereinafter referred to as NVRAM: Non-Versatile RAM) for holding even in a power-off state, and a microprocessor 4 (hereinafter referred to as “Non-Versatile RAM”) that controls the operation of the entire analog / digital broadcast receiver 20. 5 is a work memory for operating a program for controlling the analog / digital broadcast receiver 20 and a RAM memory for storing and reading various data (hereinafter referred to as a main memory). Is a program memory for storing a control program for operating the CPU 4, and 7 is a system memory. Shows the Temubasu.

  Further, in the analog / digital broadcast receiver 20 shown in FIG. 1, 8 is a digital tuner for demodulating the received digital radio wave (digital RF) signal, and 9 is multiplexed and transmitted as a digital radio wave (digital RF) signal. Separation circuit for separating and extracting signals such as video, audio, program information, and additional data (including Closed Caption data) of a specified program by decoding the transport stream (TS: Transport Stream) (Hereinafter referred to as “DEMUX”) 10 is compliant with EIA-708 standard, which receives the additional data and decodes Closed Caption (hereinafter also abbreviated as “CC”) data compliant with EIA-708 standard for digital broadcasting. Decoder (hereinafter referred to as EIA-708CC) 11 is a display device (hereinafter referred to as OSD) for displaying an on-screen screen such as a menu or Closed Caption data using an OSDIC (On Screen Display IC). ing.

  Further, in the analog / digital broadcast receiver 20 shown in FIG. 1, 12 is an analog tuner for demodulating the received analog radio wave (analog RF) signal, and 13 is a vertical blanking of the NTSC signal output from the analog tuner 12. A VBI slicer that takes out the EIA-608 standard compliant Closed Caption data on the 21st line of the period (VBI), and 14 is an EIA-608 standard compliant standard that decodes the EIA-608 standard Closed Caption data for analog broadcasting. A decoder (hereinafter referred to as an EIA-608CC decoder) is shown.

  The operation of the analog / digital broadcast receiver 20 shown in FIG. 1 will be described below. As described above, the CPU 4 operates the control program to control the entire analog / digital broadcast receiver 20, and the program executed by the CPU 4 is stored in the program memory 6. The NVRAM 3 is a rewritable nonvolatile memory, and is used for data holding that can hold data even when the power is off. The NVRAM 3 stores data that needs to be retained even when the power is turned off, such as channel information of the digital tuner 8 and the analog tuner 12, for example.

  When infrared light is emitted from the remote controller 1 as a user operation result, the infrared light is received by the I / O 2 and transmitted to the CPU 4 as instruction information from the user via the system bus 7. Thereafter, when the user presses a button on the remote controller 1, for example, switching between digital broadcasting and analog broadcasting or an instruction for channel selection is performed.

  At the time of viewing digital broadcasting, the received digital RF signal is demodulated by the digital tuner 8, and the demodulated transport stream (TS) signal is converted to a stream such as video, audio, program information, and additional data by the DEMUX 9. To be separated. Then, data of EIA-708 Closed Caption is passed to the EIA-708CC decoder 10 from among them. In addition, since the digital signal may include EIA-608 Closed Caption data, in that case, the EIA-608 Closed Caption data is passed to the EIA-608CC decoder 14. The EIA-708CC Decoder 10 or EIA-608CC decoder 14 decodes the EIA-708 Closed Caption data or the EIA-608EIA-708Closed Caption data, respectively, and the window frame generated based on the received command and the window frame The text embedded in is transferred to the OSD 11 and displayed on the screen by the OSD 11.

  When viewing analog broadcasting, the received analog RF signal is demodulated by the analog tuner 12 and EIA-608 Closed from the 21st line of the vertical blanking period (VBI) of the NTSC signal demodulated by the VBI slicer 13. Caption data is extracted and passed to the EIA-608CC decoder 14. The EIA-608CCed Caption data is decoded by the EIA-608CC decoder 14, and the window frame generated based on the received command and the text embedded in the window frame are delivered to the OSD 11, and the on-screen screen is displayed by the OSD 11. Is displayed.

  Next, a schematic processing example in the EIA-608CC decoder 10 for analog broadcasting will be described with reference to FIG. FIG. 2 is a functional block diagram showing an example of a block configuration in the EIA-608CC decoder 14 shown in FIG.

  First, in the EIA-608CC decoder 14 shown in FIG. 2, the decoding unit 141 processes 2 bytes as a pair code of the EIA-608 standard and interprets it as a command. At the same time, the service determination unit 145 specifies a service. The service code is determined to determine the service. Two bytes of the pair code interpreted as a command are sequentially delivered to the command execution unit 142 according to the service determination result in the service determination unit 145, executed as a command, and the Closed managed by the window management unit 143. The management state of the Caption data display window (display character font, character size, window size, window background color, etc.) is changed.

  Then, the drawing processing unit 144 draws the character string of the Closed Caption data in the window frame drawn according to the changed management state of the window, and outputs it as the OSD output to the OSD 11 shown in FIG. The on-screen screen is displayed.

  Further, although the standards and the decoding processing contents are completely different, even in the case of the EIA-708CC decoder 10 for digital broadcasting, it is configured as shown in FIG. 3 by the same circuit block as the EIA-608CC decoder 14, and the processing is similarly performed. Done. FIG. 3 is a functional block diagram showing an example of a block configuration in the EIA-708CC decoder 10 shown in FIG. 1. Like the EIA-608CC decoder 14 in FIG. 2, the decoding unit 101, command execution unit 102, window Each circuit block includes a management unit 103, a drawing processing unit 104, and a service determination unit 105.

  Next, an example of the operation of the service determination unit 145 of the EIA-608 CC decoder 14 in FIG. 2, that is, an example of service determination of the EIA-608 standard for analog broadcasting will be described.

  The table of FIG. 4 is a block diagram showing an example of an EIA-608 code table for determining a service of the EIA-608 standard. For data broadcast as field 1 of the EIA-608 standard, each service code It is a determination table for determining service based on. In the service determination in EIA-608, the service determination unit 145 shown in FIG. 2 determines whether or not these service codes specifying the service shown in FIG. 4 are received from the data decoded by the decoding unit 141. To do. For example, as shown in the determination table shown in FIG. 4, a hexadecimal pair code (2-byte code) of “14” and “20” is called “RCL” in a service called CC1 (Closed Caption 1) of the EIA-608 standard. A command for determining that the service is a CC1 service in the service determination unit 145 and instructing the command execution unit 142 to sequentially load subtitles to be continued one character at a time as the pop-on display mode in the CC1 service. Is executed.

  The data broadcast as field 2 of the EIA-608 standard is similarly determined. In the determination table shown in FIG. 4, each service is represented by CC1 → CC3, CC2 → CC4, TEXT1 → TEXT3, TEXT2 → It is possible to discriminate services by replacing TEXT4.

  As shown in FIG. 4, for example, a pair code of “14” and “20” (command “RCL” of service CC1) and a pair code of “1C” and “2A” (command “TR” of service TEXT2) are used. When received, as shown in FIG. 5, the service determination result in the service determination unit 145 indicates that two services, CC1 and TEXT2, are being broadcast. That is, only two services, CC1 and TEXT2, currently being broadcast are switched as the services to be switched. Therefore, when the toggle switching button is used as the service switching button operated by the user to switch the service, it is sufficient that only two services currently being broadcast can be selected. OFF → CC1 → TEXT2 → OFF And a toggle switching button for switching between the three modes. In this case, it is possible to easily switch to a desired service with only one toggle switching button as a service switching means, and not only the operability is improved but also the space of the operation panel can be saved.

  FIG. 5 is a configuration diagram showing an example of a service registration table for setting and registering the service determination result of the EIA-608 standard for analog broadcasting. “CC1” and “TEXT2” are registered as services being broadcast. Other services are marked with an “x” mark indicating unregistered. In addition, as the “index” indicating the toggle switching order, the service “CC1” is set to “1”, and the service “TEXT2” is set to “2”.

  Note that the switching means (that is, the service switching means) for the user to switch the service is not limited to a toggle switching button having a switching structure for switching the service in order. Combination), or may be composed of a plurality of buttons that can directly select an arbitrary service, or may be selected using a cursor on the screen. Means may be used.

  Further, as described above, the service determination unit 145 only determines the service by determining the service code specifying the service from the received pair code (2-byte code), and registers the service code in the service registration table of FIG. Instead, as shown in the flowchart of FIG. 6, the received pair code (2-byte code) is a service switching control code for instructing service switching or a space addition control code for instructing addition of a character code or a space (space). It may be determined whether or not the service being decoded is set as the received service, and at the same time, a process of registering in the service registration table of FIG. 5 may be performed. FIG. 6 is a flowchart illustrating an example of processing for determining a reception service of the EIA-608 standard for analog broadcasting.

  In the flowchart of FIG. 6, first, for example, when a 2-byte pair code is received from EIA-608 Closed Caption (EIA-608CC) data extracted from the 21st line of the vertical blanking period (VBI) of the analog broadcast signal ( In step S1), it is checked whether or not the pair code is a service switching control code for instructing service switching (step S2). If it is a service switching control code (YES in step S2), decoding is in progress. The service is switched to the service for which a switching instruction has been given, and is registered in the service registration table of FIG. 5 (step S5).

  On the other hand, if it is not a service switching control code (NO in step S2), the received pair code (2-byte code) is a character code that requires drawing processing or a space addition control code that instructs the addition of a space (space). (Step S3), and when a character code or a space addition control code for which a drawing process occurs is received (YES in step S3), a drawing process for drawing a character code or adding a space (space) Therefore, the service being decoded is set as the received service and registered in the service registration table of FIG. 5 (step S4). As a result, it is possible to reject a service that is not actually displayed on the screen even though the data has been sent, and it is possible to provide a better service as a service determination process. it can.

  Also, when the user performs a channel selection operation to switch the broadcast signal reception channel, or when switching to a video device or other non-broadcast input instead of receiving the broadcast signal, the NTSC synchronization signal is discriminated. When it is detected that the broadcast has stopped due to a result or the like, or depending on information such as the start time and end time of the program included in XDS (Extended Data Services: program additional information superimposed on the VBI signal), the time zone When it is determined that the program has changed to the next broadcast program, it is determined that the service has been lost because it is no longer being broadcast (that is, a service loss determination means is provided) and is currently being broadcast. It is also possible to reset (delete) a service that has been set and registered as in When determining that the broadcast program has changed, not only the above-mentioned XDS information but also information related to the program such as a service superimposed on the VBI signal, or program information from the Internet is used for broadcasting. It is also possible to judge that the program has changed.

  Further, as shown in the flowchart of FIG. 7, when a service switching control code, a character code that generates a drawing process, or a blank addition control code service is received as a pair code (2-byte code), Starts a timer that times out if the service is not received by a predetermined time limit, and when the time is out, the service is no longer broadcast and disappears, and is registered as being currently broadcast It is also possible to reset (delete) the service that is being used. Thereby, it is possible to give the user an opportunity to re-determine whether there is a service closer to the service actually broadcast. FIG. 7 is a flowchart showing another example of the process for determining the reception service of the EIA-608 standard for analog broadcasting, and shows an example of the process when the set and registered service disappears due to timeout. .

  In the flowchart of FIG. 7, first, for example, when a 2-byte pair code is received from EIA-608 Closed Caption (EIA-608CC) data extracted from the 21st line of the vertical blanking period (VBI) of the analog broadcast signal ( In step S11), it is checked whether or not the pair code is a service switching control code for instructing service switching (step S12). If the pair code is a service switching control code (YES in step S12), decoding is in progress. The service is switched to the service for which the switching instruction has been given, and is registered in the service registration table of FIG. 5 (step S15).

  On the other hand, if it is not the service switching control code (NO in step S12), it is checked whether or not the received pair code (2-byte code) is a character code requiring a drawing process or a space addition control code (step S13). ) When a character code or a space addition control code for which a drawing process is generated is received (YES in step S13), a service being decoded to perform a drawing process for drawing a character code or adding a space (space) Is registered in the service registration table of FIG. 5 (step S14). Further, for each service used for decoding, a timeout value is set and a timer is started (step S16). As a result, when the timer times out, it is determined that the service is not broadcast at all for a predetermined period, and the currently registered service is no longer broadcast. The service can be reset (deleted) from the service registration table of FIG. 5, and the service determination process can give the user a chance to determine whether there is a service closer to the service that is actually broadcast.

  Next, an example of the operation of the service determination unit 105 of the EIA-708CC decoder 10 in FIG. 3 will be described. In the EIA-708 standard for digital broadcasting, there is a descriptor describing service information currently being broadcast in the caption service descriptor of PMT (Program Map Table) and / or EIT (Event Information Table). However, even if service information is described in the descriptor, there is a case where the service is not actually broadcast. Further, there is a service packet (that is, a service block) that stores service information of Closed Caption that is currently being broadcast, and the service packet is an area called Picture User Data Extension (hereinafter referred to as a user) of a transport stream of a digital broadcast signal In the Caption Channel Packet (referred to as data), a plurality of services are accommodated for each service as illustrated in FIG.

  FIG. 8 is a schematic diagram showing an example of the configuration of an EIA-708 service packet. As an example of the configuration of a Caption Channel Packet composed of a plurality of service packets storing service information of the EIA-708 standard, An example is shown in which two service packets indicating the two services of service 4 are included.

Therefore, when the service determination unit 105 shown in FIG. 3 determines the service of the EIA-708 standard, the presence / absence of a service packet accommodated in the Caption Channel Packet of FIG. 8 from the data decoded by the decoding unit 101 The presence / absence of the service being broadcast is determined.
That is, as shown in FIG. 8, the presence / absence of a service packet contained in the decoded Caption Channel Packet is determined. If a service packet exists, the service information stored in the service packet is determined, and the service packet is determined. Determine. If it is determined that the service 1 and the service 4 are included as service determination results, a flag is set at a position indicating the determined service as shown in FIG. It is determined that only the two services “4” are currently being broadcast.

  FIG. 9 is a block diagram showing an example of a service registration table for setting and registering service determination results of the EIA-708 standard. As services being broadcast, flags are set for service numbers “1” and “4”. The remaining 61 other services that have been registered are flagged off and marked with an “x” mark indicating that they are not being broadcast. In addition, “service 1” is set to “1” and “service 4” is set to “2” as “index” indicating the toggle switching order. That is, in the registration example of FIG. 9, only two services “service 1” and “service 4” currently being broadcast are switched as the services to be switched. Accordingly, when the toggle switching button is used as the service switching button operated by the user to switch the service, it is sufficient that only two services currently being broadcast can be selected, and OFF → Service1 → Service4 → OFF. What is necessary is just to comprise as a toggle switch button which switches to three modes.

  In this case, as in the case of EIA-608 described above, it is possible to easily switch to a desired service with only one toggle switching button as a service switching means, and not only the operability is improved, but also the operation panel Space can also be saved. Note that the switching means (that is, the service switching means) for switching the service by the user is not limited to the toggle switching button, as in the case of EIA-708, and any means can be used. good.

  Whether or not valid data as Closed Caption data is stored in the service packet by extracting a character code from the service packet or extracting a control code to which a blank (space) is added. If the service packet stores valid data for performing drawing processing as Closed Caption data, only the service corresponding to the data accompanying the drawing processing is actually broadcast and the drawing processing is performed. Then, it may be determined that the service is to be displayed on the screen as Closed Caption data and registered as a service currently being broadcast. Thus, it is possible to register only the service of the service packet in which valid data accompanying the drawing process is stored in the service registration table of FIG.

  Also, when the user performs a channel selection operation to switch the broadcast signal reception channel, or when switching to a video device or other non-broadcast input instead of receiving the broadcast signal, the determination result of the digital synchronization signal The time zone is changed to the next broadcast program when it is detected that the broadcast has stopped due to, or information such as the start time or end time of the program included in the EPG (Electronic Program Guide) In such a case, it is determined that the service has not been broadcast and has been lost (that is, a service loss determination means is provided), and the setting has been registered as being broadcast until now. It is also possible to reset (delete) the service that was being used. When determining that a broadcast program has changed, not only the above-mentioned EPG information, but also information related to the program such as services included in the digital broadcast signal or program information from the Internet is used. It is also possible to determine that the broadcast program has changed.

  Similarly to the case of EIA-608 for analog broadcasting shown in FIG. 7, in the case of EIA-708 for digital broadcasting, when the character code is extracted, for each service used for decoding, the following A timer may be set to time out when the service is not received within a predetermined period, and the timer may be started. As a result, when there is no reception of data to be rendered as the service for a certain period indicated by the timeout value and a timeout occurs, it is assumed that the currently registered service is lost and no longer broadcast. The service can be reset (deleted) from the service registration table of FIG. 9, and the service determination process can give the user a chance to determine whether there is a service closer to the service that is actually broadcast.

  In digital broadcasting, not only EIA-708 standard data but also EIA-608 standard data is broadcast. Here, in the case of the analog / digital broadcast receiver 20 capable of receiving both analog broadcast and digital broadcast as shown in FIG. 1, for example, EIA-608 service registration of FIG. 5 is registered as a service of the EIA-608 standard. As shown in the table, two services of “CC1” and “TEXT2” are being broadcasted. On the other hand, as a service of the EIA-708 standard, for example, shown in the EIA-708 service registration table of FIG. Thus, if two services of “Service 1” and “Service 4” are being broadcast, an integrated service registration table that integrates both the EIA-608 service and the EIA-708 service, for example, Management is performed as illustrated in FIG. 10, and only four services “service 1”, “service 4”, “CC1”, and “TEXT 4” are switched. It may be configured to so that.

  FIG. 10 is a configuration diagram showing an example of an integrated service registration table for setting and registering service determination results of both EIA-608 standard and EIA-708 standard. ”And“ Service 4 ”are set and registered, and“ CC1 ”and“ TEXT2 ”are flagged and registered as EIA-608 broadcast services, and other services are flagged off. Is marked with an “x” mark indicating that it is not being broadcast. In addition, as an “index” indicating a toggle switching order, it is configured to be sequentially switched from EIA-708 to EIA-608, where “service 1” is “1”, “service 4” is “2”, “ “CC1” is set to “3”, and “TEXT2” is set to “4”.

  That is, in the registration example of FIG. 10, two services, “Service 1” and “Service 4” currently broadcast on EIA-708, and currently broadcast on EIA-608, are the services to be switched. Only two of “CC1” and “TEXT2” are switched. Therefore, when the toggle switching button is used as the service switching button operated by the user to switch the service, it may be configured as a toggle switching button for switching between five modes of OFF → Service1 → Service4 → CC1 → TEXT2 → OFF. It will be.

  In this case, as in the case of EIA-608 described above, it is possible to easily switch to a desired service with only one toggle switching button as a service switching means, and not only the operability is improved, but also the operation panel Space can also be saved. Note that the switching means (that is, the service switching means) for switching the service by the user is the case of the above-described EIA-608 or EIA-708 even when EIA-608 and EIA-708 as shown in FIG. 10 are integrated. Similarly to the above, any means may be used without being limited to the toggle switching button. Further, as described above, as the switching means, the service may be switched between the services of EIA-708 and EIA-60, or as a service close to the currently selected service, EIA It can also be configured to switch only within the services of -708 and EIA-608.

  Next, a display method of a service for presenting information related to a service currently being broadcast or a service currently selected to the user will be described using the integrated service registration table of FIG. 10 as an example. However, the service display method is not limited to the case of the integrated service registration table in which EIA-608 and EIA-608 are integrated as shown in FIG. 10, but the EIA-608 service registration table as shown in FIG. Even in the case of the EIA-708 service registration table as described above, the same can be applied.

  Based on the integrated service registration table of FIG. 10, the total number of active services currently being broadcasted, and the number of services selected by the user operating the toggle switch button For example, as illustrated in FIG. 11, there are any services as effective services currently being broadcast, and a total of how many services are effective. Information indicating whether the third service is selected may be displayed in a graphic form. FIG. 11 is a schematic diagram showing an example of displaying the service switching state in a graphic form, and shows an example in which the second “Service4” is displayed as a figure surrounded by a frame as the currently selected service. ing.

  That is, in the display example of FIG. 11, the number of services that are set and registered in the “broadcasting” column in the integrated service registration table of FIG. The total number of active services currently being broadcast is displayed as the denominator of the fraction on the left side of FIG. 11, and the toggle switching order shown in the “index” column of FIG. As shown, it is displayed as a fractional numerator on the left side of FIG. Further, the switching position of the service switching means such as the toggle switching button operated by the user is acquired, and the currently selected service is indicated as shown in FIG. it's shown.

  In this way, the denominator indicating the total number of services currently being broadcast and the numerator indicating the toggle switching order in case of using the toggle switching button as a service switching means are displayed in fractions. Instead of displaying such fractions, each may be displayed separately. Alternatively, when the toggle switching button is not used as the service switching unit, the total number of services and the toggle switching order may not be displayed.

The display example in FIG. 11 shows an example in which all currently broadcast services are displayed as a list display in a form connected with a down arrow so as to clearly indicate the toggle switching order. For example, the list may be displayed in a table format as shown in FIG. FIG. 12 is a schematic diagram showing another example of displaying the service switching state in a graphic form. The currently broadcast service is displayed in a table format, and the currently selected service is hatched and highlighted. An example is shown. In addition, the display format for highlighting the currently selected service is not limited to the case where the service is surrounded by a frame or hatched, and the font, size, or character color of the displayed character may be changed for emphasis. The background color may be changed and emphasized, and any highlighting format may be used as long as it can be identified that the service is currently selected.
Furthermore, unlike the display examples of FIGS. 11 and 12, not all services currently being broadcast are displayed as a list, but only services that are currently switched and selected are displayed. good.

  In addition, since the descriptor called “caption service descriptor” described in the PMT and / or EIT includes language information used by each service in the EIA-708 standard, the service name on the EIA-708 side is Language information may also be used for display. As an example of this, instead of the service names “Service1” and “Service4” in FIGS. 11 and 12, for example, only language information may be displayed as shown in FIG. FIG. 13 is a schematic diagram showing still another example in which the service switching state is displayed as a graphic. “English” is used as language information instead of the service name “Service1” in the display example of FIG. In this example, “Spanish” is displayed as language information instead of the service name “Service4”.

In the service state illustrated in the integrated service registration table of FIG. 10, when the currently selected service is not broadcast, for example, while selecting “service 4” for digital broadcasting, the “ When the service 4 ”is no longer broadcast (disappears), the state transitions to a state as shown in FIG. 14 and, after that, naturally, the service 4 cannot be displayed. In this case, as an initial value, Of the services for digital broadcasting such as “service 4” currently selected, the service may be automatically switched to “service 1”, which is the youngest service currently being broadcast. Or you may make it switch to the service for digital broadcasting in the switching order next to the "service 4" which was being selected. Alternatively, if there is no other digital broadcast service that has been selected, in some cases, the service closest to “service 4” that has been selected among the analog broadcast services ( The service may be switched to a service determined to be closest to the service selected from the language information and data contents. In EIA608 and EIA708, there is a possibility that the same data may flow, and if the data is in the same language, or subtitles for people who are hard to hear even in English (in addition to English subtitles, information such as sound, for example, , Door opening / closing sounds, wind sounds, screams and other sound information) and subtitles for people who cannot speak English (translated into other languages, not including sound information), and they are close to each other Or the closest.

FIG. 14 is a configuration diagram showing another example of the integrated service registration table for setting and registering the service determination results of both the EIA-608 standard and the EIA-708 standard. "4" indicates the service registration state when disappearing.
In other words, when the currently selected service is not broadcast, it is determined whether or not another service exists by searching the integrated service registration table as shown in FIG. 10, and there are a plurality of other services. If it is, the service closest to the currently selected service is extracted from the service (that is, using the approximate service determination means for determining and acquiring the service closest to the currently selected service, The closest service is extracted), and the setting is made by switching to the closest service.

  More specifically, as shown in the integrated service registration table of FIG. 10, the Closed Caption service and the TEXT service, which are completely different in service form, are managed separately, and the integrated service registration table of FIG. 10 is referred to by the switching position of the toggle switching button. Thus, the currently selected service can be acquired including either the Closed Caption service or the TEXT service. That is, the integrated service registration table of FIG. 10 provides service type discrimination means for discriminating between each of the registered services, the Closed Caption service and the TEXT service. Referring to the column, it is possible to acquire what the Closed Caption service and the TEXT service are as currently broadcasted services, and what is the closest service to the currently selected service. An approximate service determination means can also be provided.

  Thus, for example, when the currently selected service is one of the Closed Caption services and the service is not broadcasted, the currently selected Closed Caption service currently being broadcast is selected. When the service closest to the service is searched and the selected service is switched to the closest service, and the currently selected service is one of the TEXT services, the service is not broadcast. In this case, it is only necessary to search for a service closest to the currently selected service among the currently broadcast TEXT services, and to select the service closest to the searched service. This prevents the automatic switching between the Closed Caption service and the TEXT service, prevents the screen display form from being switched suddenly, and improves the serviceability to the user on the screen display. can do.

  As shown in the integrated service registration table in FIG. 14, when “service 4” is once lost and then restored to the state where “service 4” is broadcast again, of course, For example, the service 4 ”may be re-registered, and may be restored to the service state shown in the integrated service registration table of FIG. 10, for example. By determining that “has been revived”, it may be automatically switched to the revived “service 4” for selection.

  Further, not only the integrated service registration table of FIG. 10 but also the case where only the analog broadcasting EIA-608 service is registered as in the EIA-608 service registration table of FIG. As shown in the EIA-708 service registration table, even when only the digital broadcast EIA-708 service is registered, the process for the closest service can be performed in exactly the same manner.

  As described above, the EIA-608 TEXT (text) service is a service that displays text in a format different from the Closed Caption service. As a service unrelated to the content being broadcast, most of the screen is displayed. It is displayed by covering with a specific background.

  For example, when “Service 1” is being selected in the service state as shown in the integrated service registration table of FIG. 14, both “Service 1” and “CC1” of the Closed Caption service are no longer broadcast. In the case of (disappearing), the state becomes as shown in FIG. 15, and only the “TEXT2” service exists. FIG. 15 is a block diagram showing still another example of the integrated service registration table for setting and registering the service determination results of both the EIA-608 standard and the EIA-708 standard. In the service state shown in FIG. "And" CC1 "are shown in the service state.

  Here, as shown in the service state of FIG. 15, when the service is automatically switched to the remaining “TEXT2” service, as described above, most of the screen is suddenly covered with the background and displayed. The broadcast video inside is hidden, which can confuse the user. Therefore, even if the Closed Caption service has all disappeared, if the currently selected service is a Closed Caption service, the currently selected service It is also possible to determine the closest Closed Caption service, and even after the currently selected service is no longer broadcasted, the Closed Caption service closest to the no longer broadcasted service can be temporarily switched and selectively displayed. .

  For example, if the service set as currently selected is “service 1”, even if the service of the Closed Caption has all disappeared, the selected “service 1” As the Closed Caption closest to “,” a service switching state that temporarily sets the “service 1” being selected may be selected. Thus, even if there is only a TEXT (text) service with a completely different display format other than the Closed Caption service, the display format is significantly different from the Closed Caption service currently being broadcast. Therefore, the TEXT (text) service (“TEXT2” in FIG. 15) is not switched.

  On the other hand, when all TEXT services are not broadcast and disappear when the TEXT service is selected, even if the Closed Caption service exists as a currently broadcast service, it is displayed. Instead of switching to the Closed Caption service whose format is significantly different, a service switching state in which the TEXT service closest to the selected TEXT service is temporarily set may be selected.

  That is, when “TEXT2” is being selected in the service state as shown in the integrated service registration table of FIG. 14, “TEXT2” is no longer broadcast unlike the case where the above-mentioned Closed Caption service is lost. When it is lost (disappears), the state is as shown in FIG. 16, and only the “Closed Caption Service” of “Service 1” and “CC1” exists. FIG. 16 is a configuration diagram showing still another example of the integrated service registration table for setting and registering the service determination results of both the EIA-608 standard and the EIA-708 standard. In the service state shown in FIG. Shows the service status when is lost. In this case, even if “CC1” of EIA-608 is the service of the next switching order, since the screen is currently set to a state in which most of the screen is covered with the background, Instead of switching to “CC1” of the Closed Caption service whose format is significantly different, as described above, for example, “TEXT1” is temporarily used as the TEXT service closest to “TEXT2” being selected. A service switching state to be set may be selected.

  Or, unlike the case described above, when “TEXT2” is not broadcasted, when the currently existing services are “Service 1” and “CC1” which are services of Closed Caption, Without switching to either “Service 1” or “CC1” and without temporarily setting “TEXT1” as being closest to “TEXT2” that is no longer broadcast, It may be set by switching to an off state where no screen display is performed.

  The processing for suppressing the automatic switching between the Closed Caption service and the TEXT service is not limited to the case of the integrated service registration table as shown in FIG. 10, but the EIA-608 service registration table as shown in FIG. Even in the case of EIA-708 service registration table as shown in FIG. 9, it can be implemented in exactly the same way.

  In addition, after the service being selected disappears, if there is a service switching state that is temporarily selected and set as the service closest to the service, it is assumed that the currently selected state is present. The user cannot determine whether the displayed service is temporarily selected or is currently selected as an active service being broadcast, which may cause confusion to the user. Therefore, as shown in FIG. 11 to FIG. 13, when the service switching state is displayed in a graphic form, for the service in the temporarily selected state, for example, the service name and language information are expressed by enclosing them in parentheses. For example, the display method may be displayed differently from other service states. That is, () is an identification display indicating that the service switching means is not the currently selected service but the service closest to the currently selected service. In addition, the display that can identify such a temporary selection state (that is, the display surrounded by () in the above example) is not limited to the case where all services currently broadcast are displayed as a list. In the case where only the service currently in the selected state is displayed, the same application can be applied.

  For example, in the display example of the service switching state in FIG. 11, when “service 4” is not broadcasted and the number of effective services currently being broadcast decreases from four to three as shown in FIG. When “Service 1” for digital broadcasting is temporarily selected as the Closed Caption service for digital broadcasting that is closest to “Service 4” that has disappeared after being broadcast, the service is temporarily switched to the closest service. As shown in FIG. 17, () may be added to “service 1” and “(Service 1)” and the service name may be enclosed as shown in FIG.

  FIG. 17 is a schematic diagram showing still another example in which the service switching state is displayed as a graphic, and shows a display example of the service switching state when the service is temporarily switched. That is, even if the currently selected “service 4” disappears from the state shown in the display example of the service switching state in FIG. 11, it is assumed that the service is the closest to the lost “service 4” and “service 1”. It shows a state where is temporarily selected and switched. Thereafter, when “service 4” is restored, it is natural that the () display indicating the temporary service switching state is deleted from “service 1” and the restored “service 4” is displayed again. At the same time, the selection state may be automatically switched and set to the restored “service 4”, and “service 4” may be displayed in a frame.

  It should be noted that the fraction display on the left side indicating the total number of services and the service selection order is effective because the number of effective services being broadcast is reduced from four to three in the example of FIG. The denominator for displaying the number of active services is updated to “3” instead of “4”, and “1/3”, “2/2 /” for the remaining valid services, ie, “Service1”, “CC1”, and “TEXT2”, respectively. 3 ”and“ 3/3 ”.

  Also, in the service state as shown in the integrated service registration table of FIG. 14, when “service 1” which is a service of EIA-708 is being selected, “service 1” of EIA-708 is not broadcasted. When it is lost (disappears), the state becomes as shown in FIG. 18, all the services of EIA-708 are lost, and only “CC1” and “TEXT2” of EIA-608 exist. FIG. 18 is a configuration diagram showing still another example of the integrated service registration table for setting and registering the service determination results of both the EIA-608 standard and the EIA-708 standard. In the service state shown in FIG. "Is lost, and the service state when all the services of EIA-708 are lost is shown. In this case, as shown in the selection order of FIG. 18, the Closed Caption service “CC1” for analog broadcasting is selected and displayed as the closest service to the Closed Caption service “Service 1” for digital broadcasting. good.

  In other words, in this case, when switching to analog broadcasting, the operation of the EIA-708 service is performed just as it is no longer broadcast, and switching of services is performed with the same mechanism for analog broadcasting and digital broadcasting. It is possible to be Contrary to the above example, if all the EIA-608 services are lost while the EIA-608 service is selected, the service is switched to the EIA-708 service, and analog broadcasting is changed to digital broadcasting. The service may be switched by the same mechanism as the switching.

  That is, service acquisition means that can acquire both the analog broadcasting EIA-608 service and the digital broadcasting EIA-708 service as services closest to the currently selected service are provided. By operating the broadcast switching means for switching between analog broadcasting and digital broadcasting to switch between analog broadcasting and digital broadcasting, the system automatically switches to the service closest to the currently selected service. Switching between broadcasting and digital broadcasting and switching between services of EIA-608 and EIA708 can be realized with exactly the same mechanism.

It is a functional block diagram which shows one embodiment of the analog / digital broadcast receiver by this invention. It is a functional block diagram which shows an example of the block configuration in an EIA-608CC decoder. It is a functional block diagram which shows an example of the block configuration in an EIA-708CC decoder. It is a block diagram which shows an example of the EIA-608 code table for determining the service of EIA-608 standard. It is a block diagram which shows an example of the service registration table which sets and registers the service determination result of EIA-608 standard. It is a flowchart which shows an example of the process which determines the reception service of EIA-608 specification. It is a flowchart which shows the other example of the process which determines the reception service of EIA-608 specification for analog broadcasting. It is a schematic diagram which shows an example of a structure of an EIA-708 service packet. It is a block diagram which shows an example of the service registration table which sets and registers the service determination result of EIA-708 standard. It is a block diagram which shows an example of the integrated service registration table which sets and registers the service determination result of both EIA-608 standard and EIA-708 standard. It is a schematic diagram which shows an example which displays the switching state of a service in a figure. It is a schematic diagram which shows the other example which displays the switching state of a service in a figure. It is a schematic diagram which shows the further different example which displays the switching state of a service in the figure. It is a block diagram which shows the other example of the integrated service registration table which sets and registers the service determination result of both EIA-608 standard and EIA-708 standard. It is a block diagram which shows the further different example of the integrated service registration table which sets the service determination result of both the EIA-608 standard and the EIA-708 standard. It is a block diagram which shows the further different example of the integrated service registration table which sets and registers the service determination result of both EIA-608 standard and EIA-708 standard. It is a schematic diagram which shows the further different example which displays the switching state of a service in the figure. It is a block diagram which shows the further different example of the integrated service registration table which sets and registers the service determination result of both EIA-608 standard and EIA-708 standard.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Remote control, 2 ... I / O (interface), 3 ... NVRAM, 4 ... CPU (microprocessor), 5 ... Main memory (RAM), 6 ... Program memory, 7 ... System bus, 8 ... Digital tuner, 9 ... DEMUX (TS decoder), 10 ... EIA-708CC decoder, 11 ... OSD (presentation device), 12 ... analog tuner, 13 ... VBI slicer, 14 ... EIA-608CC decoder, 20 ... analog / digital broadcast receiver, 101 ... decode , 102 ... Command execution part, 103 ... Window management part, 104 ... Drawing processing part, 105 ... Service determination part, 141 ... Decoding part, 142 ... Command execution part, 143 ... Window management part, 144 ... Drawing processing part, 145 ... service decision part.

Claims (20)

EIA-608CC which extracts data of EIA-608 Closed Caption (hereinafter referred to as EIA-608CC) compliant with EIA-608 standard from the vertical blanking period (VBI) of the analog broadcast signal in a broadcast receiver capable of receiving analog broadcast A data extraction means; an EIA-608CC decoding means for decoding the extracted EIA-608CC data; and a service code for identifying a service included in the decoded EIA-608CC data, and an EIA- Service determining means for determining and registering each service of 608, and determining that the service that has been broadcast has shifted to a state where it is no longer broadcast, and registering the service that has been determined to be no longer broadcast by the service determining means Has been broadcast now Service deletion means for deleting from the service, and service switching means for selecting and switching any one of the services using only each service of EIA-608 currently broadcast registered in the service determination means , A broadcast receiver characterized in that as the service switching means, switching means for switching only the currently broadcast service in order for each operation is used .   2. The broadcast receiver according to claim 1, wherein when the service determination means determines and registers each service of EIA-608 currently broadcast, the service included in the decoded EIA-608CC data. It is determined whether data with drawing is included in the decoded EIA-608CC data as well as the code. If data with drawing is included, it is determined as a currently broadcast service. A broadcast receiver characterized in that it is registered. EIA-708CC data extraction means for extracting EIA-708 Closed Caption data (hereinafter referred to as EIA-708CC) compliant with the EIA-708 standard from a digital broadcast signal transport stream in a broadcast receiver capable of receiving digital broadcasts; The EIA-708CC decoding means for decoding the extracted EIA-708CC data, the service packet included in the decoded EIA-708CC data is extracted, the service information of the service packet is determined, and it is currently being broadcast Service determining means for determining and registering each service of EIA-708, determining that the service that has been broadcast has shifted to a state where it is no longer broadcasted, and determining that the service that has not been broadcast is the service determination means Registered by The service deletion means for deleting from the currently broadcasted service and the currently broadcasted EIA-708 services registered in the service determination means are used to select one of the services. A broadcast receiver , comprising: a service switching means for switching, wherein the switching means for switching only the currently broadcasted service in order for each operation is used as the service switching means .   4. The broadcast receiver according to claim 3, wherein when the service determination means determines and registers each service of EIA-708 currently broadcast, the service included in the decoded EIA-708CC data. In addition to packet service information, it is determined whether or not the decoded EIA-708CC data includes data with drawing. If data with drawing is included, the data is currently being broadcast. A broadcast receiver characterized by determining and registering as a service. In a broadcast receiver capable of receiving both analog broadcast and digital broadcast, EIA-608 Closed Caption (hereinafter referred to as EIA-608CC) data compliant with the EIA-608 standard is used as a vertical blanking period (VBI ) for analog broadcast signals. and EIA-608CC data extracting means for extracting pressurized et al, and EIA-608CC decoding means for decoding the extracted EIA-608CC data, EIA-708 standard compliant EIA-708Closed Caption (hereinafter, abbreviated as EIA-708CC) data Included in the EIA-708CC data extracting means for extracting from the transport stream of the digital broadcast signal, the EIA-708CC decoding means for decoding the extracted EIA-708CC data, and the decoded EIA-608CC data The service code that identifies the service that is present is determined, the service packet included in the decoded EIA-708CC data is extracted, the service information of the service packet is determined, and the EIA-608 that is currently being broadcast The service determination means for determining and registering each service of EIA-708 currently being broadcast and the service being broadcasted, and determining that the service that has been broadcast has shifted to a state where it has been broadcast is stopped. A service deletion unit that deletes the service determined to have been registered from the currently broadcast service registered by the service determination unit, and each of the currently broadcast EIA-608 services registered in the service determination unit; Using only each service of EIA-708, select one of the services A service switching means for changing Ri, as said service switching means, the broadcast receiver being characterized in that using the switching means will switch only the order service that the currently broadcasted for each operation.   6. The broadcast receiver according to claim 5, wherein the service determination unit determines and registers each service of EIA-608 currently broadcast and each service of EIA-708 currently broadcast. In addition to the service code included in the decoded EIA-608CC data, it is determined whether the decoded EIA-608CC data includes data with drawing, and the decoded EIA-708CC data. If the decoded EIA-708CC data includes not only the service information of the service packet included in the service data but also whether the data with drawing is included, and if the data with drawing is included Is a broadcast receiver characterized by determining and registering as a currently broadcast service.   The broadcast receiver according to claim 5 or 6, wherein a broadcast switching means for switching between analog broadcast and digital broadcast, and each service of EIA-608 for analog broadcast currently broadcast registered by the service determination means; Service acquisition means for discriminating and acquiring the EIA-608 service and the EIA-708 service that are close to the currently selected service by the service switching means from each of the EIA-708 services for digital broadcasting When the switching between the analog broadcast and the digital broadcast is performed by the broadcast switching means, each service of EIA-608 for analog broadcast applied to the switched analog broadcast or digital broadcast or digital broadcast Of any of EIA-708's services Broadcast receiver and switches to close the service on the acquired service currently selected by-bis acquisition means.   The broadcast receiver according to any one of claims 1 to 7, wherein a toggle switching button having a switching structure that switches in order for each operation is used as the service switching means.   9. The broadcast receiver according to claim 1, wherein a service disappearance determining means for determining that a broadcast service has shifted to a state where it is no longer broadcast, and a current broadcast registered by the service determination means. And an approximate service determination unit that determines and acquires a service close to the currently selected service by the service switching unit, and the service erasure determination unit broadcasts the currently selected service. A broadcast receiver characterized by switching to the near service acquired by the approximate service determination means when it is determined that the service is no longer performed.   The broadcast receiver according to claim 9, wherein when the currently selected service that is no longer broadcast is restored and broadcasting is resumed, the state is switched to the near service acquired by the approximate service determination unit The broadcast receiver is automatically switched back to the currently selected service that has been resumed.   11. The broadcast receiver according to claim 9 or 10, further comprising: a service type determination unit that determines a service type of a Closed Caption service and a TEXT service for each service registered by the service determination unit, When the approximate service determining unit determines and obtains a service close to the currently selected service, if the currently selected service is a Closed Caption service, the Closed service determined by the service type determining unit is used. The close service is determined only from among the Caption services, and if the currently selected service is a TEXT service, the close service is determined only from the TEXT services determined by the service type determining means. It is characterized by distinguishing Broadcast receiver.   12. The broadcast receiver according to claim 11, wherein when the approximate service determination unit determines and obtains a service close to the currently selected service, all services of the same service type as the currently selected service are broadcast. A broadcast receiver characterized by determining and setting a service that is close to the currently selected service from among the services that are no longer broadcast when there is no service.   13. The broadcast receiver according to claim 12, wherein when the service has been switched from a service that has not been broadcast to a close service set by the approximate service determination means, the current broadcast is no longer broadcast. When the selected service is resumed, or when broadcasting of a service of the same service type as the currently selected service that is no longer being broadcast is started, the service is switched to the near service set by the approximate service determination unit. A broadcast receiver, characterized in that it automatically switches from a state that has been resumed to the currently selected service that has been resumed or the service of the same service type that has been initiated.   The broadcast receiver according to any one of claims 8 to 13, wherein the service loss determination means determines a change in broadcast channel tuning or an operation for switching to an input other than broadcast, or the broadcast is stopped. When it is determined that the program has been changed, or when it is determined that the program has been changed due to the arrival of the start time or end time according to the program information, or it is determined that the service has not been broadcast for a predetermined period of time. A broadcast receiver characterized in that the service is determined not to be broadcast and lost.   15. The broadcast receiver according to claim 1, wherein at least a service name of each service currently broadcast and / or language information used by the service registered by the service determination means, and a current broadcast. A broadcast receiver, characterized in that information indicating a service currently selected by the service switching means is displayed among the services that are being operated.   15. The broadcast receiver according to claim 1, wherein at least a service name of a service currently selected by the service switching means and / or a language used by the service among the currently broadcast services. A broadcast receiver characterized by displaying information.   17. The broadcast receiver according to claim 15 or 16, further displaying the total number of currently broadcast services registered by the service determination means.   18. The broadcast receiver according to claim 15, further comprising displaying a switching order of services of the toggle switching button in preparation for using a toggle switching button as the service switching means. Broadcast receiver.   19. The broadcast receiver according to claim 15, wherein the service displayed as the currently selected service is not the service currently selected by the service switching means but the currently selected service. In the case where the service is switched to a service close to the broadcast, the service switching means can display an identification display indicating that the service is switched to the close service instead of the service currently selected. Receiving machine.   20. The broadcast receiver according to claim 19, wherein when the service switching means switches back to the state of the currently selected service from the state switched to the close service, the service is switched to the close service. A broadcast receiver characterized in that the identification display indicating that it is present is deleted and displayed.

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