JP2012134900A - Information display control apparatus, information display control method, information display control program, and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information display control apparatus, an information display control method, and an information display control program that are capable of complementing, on the basis of character information (subtitle information), video information content damaged by switching of plural items of received video information which have different information forms, and a recording medium used therewith.SOLUTION: The information display control apparatus receives images and subtitles in a 12-segment broadcast, and images and subtitles in a one-segment broadcast having the same content as the 12-segment broadcast, and stores the subtitles in both broadcasts. When displaying the images in both broadcasts while alternately switching between them, the information display control apparatus displays the stored subtitles in the one-segment broadcast together with the images in the 12-segment broadcast, which are obtained after the switching.

Description

  The present invention relates to an information display control device, an information display control method, an information display control program, and a recording medium.

  A digital broadcast receiver mounted on a moving body such as a vehicle can receive digital broadcasts such as multimedia information in addition to encoded (digitized) video information and audio information.

  This digital broadcasting is a broadcasting system in which a band of 6 MHz is received in units of segments divided into a plurality of segments (13 segments in ISDB-T (Integrated Services Digital Broadcasting-Terrestrial) formulated as a standard for digital broadcasting), Among these, digital broadcasting provided using only one segment is referred to as “one-segment broadcasting”, and digital broadcasting provided using segments other than the segment used for one-segment broadcasting is referred to as “12-segment broadcasting”.

  One-segment broadcasting and 12-segment broadcasting can be switched to each other, and switching to an optimal broadcasting format is performed according to the reception state of radio waves. In the one-segment broadcasting and the 12-segment broadcasting, the same program can be broadcast by “simal broadcasting”.

  Since the one-segment broadcasting and the 12-segment broadcasting have different compression formats, the transmission timing and the time required for decompression differ, so that there may be a time lag in switching between them.

  In Patent Document 1, subtitle control information for weak hierarchy (12-segment broadcasting) that is being simulcast instead of subtitle information for strong hierarchy (one-segment broadcasting) is converted into edited subtitle information for display for strong hierarchy use. A technique for displaying in synchronization with video information of a strong hierarchy is disclosed.

JP 2009-171393 A

  In such a conventional technique, although advanced subtitle information having a large amount of information can be displayed when receiving a strong layer (one-segment broadcasting) and receiving a weak layer (12-segment broadcasting), one-segment broadcasting is possible. And lack of video / audio information that occurs when switching between 12-segment broadcasting and 12-segment broadcasting.

  Therefore, the present invention provides an information display control device, an information display control method, and information that can complement the display content of video information lost due to switching of a plurality of video information received in different information modes based on caption information. An object is to provide a display control program and a recording medium.

  In order to achieve the above object, the invention of claim 1 is characterized in that the first information receiving means for receiving the first video information and the first character information based on the contents of the first video information, and the same type as the first video information. And second information receiving means for receiving second video information having a different information form from the first video information and second character information based on the content of the second video information, and the second information Character information storage means for storing the second character information received by the receiving means in association with the second video information; first video information received by the first information receiving means; and second information receiving means Display means for displaying any one of the second video information received by the display, and display switching means for switching display between the first video information and the second video information displayed by the display means; Switch display When the display is switched from the second video information to the first video information by a stage, the second character associated with the second video information stored in the character information storage means after the display switching. Output control means for controlling output of information together with the first video information after display switching.

The invention of claim 8 is an information display control method used in an information display control device,
A first information receiving step for receiving first video information and first character information based on the content of the first video information; and information different from the first video information in the same type as the first video information. A second information receiving step of receiving the second video information of the aspect and the second character information based on the content of the second video information; and the second character information received by the second information receiving step. Displaying one of a character information storage step stored in association with video information, the first video information received by the first information reception step, and the second video information received by the second information reception step A display switching step, a display switching step for switching display between the first video information and the second video information displayed by the display step, and the first video information from the second video information by the display switching step. Projection When the display is switched to information, the second video information associated with the second video information stored in the text information storage step after the display switching is used as the first video information after the display is switched. And an output control step of controlling output.

  The invention according to claim 9 is characterized in that the information display control method according to claim 8 is caused to be executed by a calculation means.

  The invention according to claim 10 is characterized in that the information display control program according to claim 9 is readable by a computing means.

1 is an example of a block diagram illustrating a detailed configuration of an information display control device configured by applying an information display control device, an information display control method, an information display control program, and a recording medium according to an embodiment of the present invention. The figure which shows the data structure of the MPEG-2 TS packet in the case of transmitting using the transmission technique of MPEG-2 TS. The block diagram which shows the detailed structure of the information control process part 105 shown in FIG. The block diagram which shows the detailed structure of the information analysis part 103 shown in FIG. The timing chart which represented the output state of video / audio information and the output state of subtitle information in time series. The timing chart which represented the output state of video / audio information and the output state of subtitle information in time series. The figure which shows the state which merged subtitle information and displayed it superimposed on video-audio information. The timing chart which represented the output state of video / audio information and the output state of subtitle information in time series. The timing chart which represented the output state of video / audio information and the output state of subtitle information in time series. The flowchart which shows the flow of the process performed in the information display control apparatus comprised by applying the information display control apparatus in the embodiment of this invention, the information display control method, the information display control program, and the recording medium. The flowchart which shows the detailed flow of the output control process in case the switch of the display form which outputs digital broadcast information shown in FIG. 10 (switching from 1 segment broadcasting to 12 segment broadcasting) event generate | occur | produces. The flowchart which shows the detailed flow of the output control process in case the switching of the display form which outputs digital broadcast information shown in FIG. 10 (switching from 12-segment broadcasting to one-segment broadcasting) event occurs.

  Hereinafter, an information display control device, an information display control method, an information display control program, and a recording medium according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is an example of a block diagram showing a detailed configuration of an information display control apparatus configured by applying an information display control apparatus, an information display control method, an information display control program, and a recording medium according to an embodiment of the present invention. .

  In FIG. 1, the information display control device 100 is also referred to as a “digital (broadcast) broadcast receiving device”, and includes a tuning processing unit 101, a received data processing unit 102, an information analysis unit (source decoder unit) 103, a storage unit 104, information A control processing unit 105 is provided.

  Information analyzed by the information analysis unit 103 of the information display control device 100 is displayed on the display 110 including a voice output device (speaker).

  The tuning processing unit 101 is also referred to as a “tuner”, and is video information (also referred to as “display information”), audio information, text information (hereinafter referred to as “caption information”), etc. (hereinafter referred to as “subtitle information”) captured and created in a broadcasting station or the like. These are collectively referred to as “digital broadcast information”), and digital broadcasts of digital signals obtained by discretely changing are tuned and received.

  At the time of tuned reception of this digital broadcast, the digital broadcast information imaged and created by a broadcasting station or the like is digitized (encoded) into a digital signal, and is compressed by a compression format that is optimal for each piece of information constituting the digital broadcast information. (Compression encoding process). The digital broadcast information subjected to the compression encoding process is multiplexed and sent via a radio tower or a satellite.

  As this compression encoding technique, for video information, compression encoding techniques such as “MPEG-2 (Moving Picture Experts Group-2)” and “H.264 / AVC (Advanced Video Coding)” are used. For audio information, an audio encoding method such as “MPEG-2 AAC (Advanced Audio Coding)” is used, and for caption information, a data broadcasting description language such as BML (Broadcast Markup Language) is used. Can be used.

  The digital broadcast information compressed and encoded in this way is multiplexed and transmitted by a stream by using a transmission technique such as MPEG-2 TS (Transport Stream).

  The tuning processing unit 101 receives and demodulates the digital broadcast information multiplexed in this way.

  Digital broadcast information transmitted based on the MPEG-2 TS transmission technology or the like is modulated by a modulation method such as an OFDM (Orthogonal Frequency Division Multiplexing) method and can be received by the tuning processing unit 101 by being controlled for transmission. .

  This modulation method using OFDM has a 13-segment structure in which a frequency band used for broadcasting is divided into 13 segments and can be used for modulation (demodulation) in units of segments. A method for receiving digital broadcast information using only one segment of a predetermined frequency band is called “one-segment broadcasting”, and a method for receiving digital broadcasting using a segment other than the segment used in this one-segment broadcasting. This is called “12-segment broadcasting”.

  That is, the same type of content (program content) can be received in two different information modes (hereinafter also referred to as “display modes”). The one-segment broadcasting at this time is compressed using a compression encoding technique with a compression rate higher than the compression rate of the compression processing used for 12-segment broadcasting.

  The data format of the digital broadcast information received by the tuning processing unit 101 is shown in FIG.

  FIG. 2 is a diagram showing a data structure of an MPEG-2 TS packet when transmission is performed using the MPEG-2 TS transmission technology.

  In FIG. 2, FIG. 2 (a) shows the overall structure of the MPEG-2 TS packet, which consists of a total of 188 bytes. The MPEG-2 TS packet includes an MPEG-2 TS header section 201 and an MPEG-2 TS data section 202.

  Further, FIG. 2B shows a detailed data structure in the MPEG-2 TS header section 201 and a detailed data structure in the MPEG-2 TS data section 202 shown in FIG.

  2B includes at least a synchronization signal 203, a TS error display 204, a payload unit start display signal 205, a priority display signal 206, a PID 207, a scramble control signal 208, and an adaptation field control signal 209. , A continuity counter 210.

  The PID 207 is information for identifying the type of the MPEG-2 TS packet, and is information indicating what kind of information the MPEG-2 TS packet is.

  This PID 207 indicates type information for identifying which information (video information, audio information, caption information) of digital broadcast information, information on a display form (information mode), and information on which channel. The information shown is specified.

  Upon receiving the digital broadcast information having such a packet structure, the tuning processing unit 101 shown in FIG. 1 sends this digital broadcast information to the reception data processing unit 102. The received data processing unit 102 to which the digital broadcast information has been sent analyzes the digital broadcast information multiplexed using the PID 207 having the packet structure as shown in FIG. Each time, a decoding process for decoding the compression-encoded data is performed.

  In the case of one-segment broadcasting, as described above, since it is compressed at a higher compression rate than 12-segment broadcasting, more time is required than when digital broadcast information in 12-segment broadcasting is decoded. For this reason, the display of digital broadcast information in one-segment broadcasting may be delayed from the display of digital broadcast information in 12-segment broadcasting.

  The reception data processing unit 102 that has been decoded in this way sends the digital broadcast information after the decoding process to the information analysis unit 103.

  In addition, the reception data processing unit 102 sends information that is handled as reception state information (hereinafter referred to as “reception state information”) in the information control processing unit 105 to the information control processing unit 105. Examples of the “information to be handled as reception state information” include, for example, information such as the amount of packets per unit time of the received MPEG-2 TS packet and the transmission loss rate based on the number of error correction processes, as well as the electric field strength. There is information.

  The information on the electric field strength is strength information determined based on the distance away from the radio tower and the radio wave condition, and generally the electric field strength decreases according to the distance.

  The information control processing unit 105 registers such information (information to be handled as reception state information) as “reception state information”.

  In the information analysis unit 103 that has received the digital broadcast information decoded from the reception data processing unit 102, the storage unit 104 is used as a work area, and the display mode is switched to a display mode corresponding to the reception state of the digital broadcast information. The digital broadcast information is output to the display 110. That is, in the case of video information of digital broadcast information, it is displayed and output on the display 110, in the case of audio information, it is output as audio, and in the case of caption information, it is displayed and output.

  The display format switching process and the subtitle information display / non-display switching process performed by the information analysis unit 103 receive the notification signal from the information control processing unit 105, and the display mode specified by the notification signal This is performed based on whether or not caption information is displayed.

  FIG. 3 is a block diagram showing a detailed configuration of the information control processing unit 105 shown in FIG.

  3, the information control processing unit 105 includes an information registration control unit 50, a reception state information storage unit 51, a display mode switching determination control unit 52, an information storage unit 53, and a caption display instruction control unit 54. .

  When “information to be handled as reception state information” is sent from the reception data processing unit 102 shown in FIG. 1, the information registration control unit 50 receives this information, and the information registration control unit 50 A process of registering “information to be handled as reception state information” in the reception state information storage unit 51 as reception state information is performed.

  Accordingly, the reception state information storage unit 51 is in a state where the reception state information is stored by the registration process by the information registration control unit 50.

  Subsequently, the display mode switching determination control unit 52 monitors the reception state information storage unit 51 and detects that registration of reception state information has been newly started, that is, the information display control device 100 performs digital broadcasting. When it is detected that information has been newly received, the “display mode switching determination information” stored in the information storage unit 53 is expanded in the work area, and the display mode switching control based on the “display mode switching determination information” is performed. Do.

  The information storage unit 53 stores “display mode switching determination information” and “caption display setting information”.

  This “display mode switching determination information” is information that is a source for performing a determination process for switching the display mode between 1-segment broadcasting and 12-segment broadcasting, and includes, for example, a transmission loss rate and electric field strength of a threshold for performing switching determination. Is set. In addition, “Subtitle display setting information” is set as an initial setting whether to display subtitle information together with video information, and which display is displayed when the display mode is switched between 1-segment broadcasting and 12-segment broadcasting. It is set how to display the subtitle information in the form.

  When it is determined that the display mode is to be switched by the switching control, the display mode switching determination control unit 52 instructs the information analysis unit 103 (“video / audio output state switching control unit 33” described later) to switch the display mode. Then, the subtitle display instruction control unit 54 is notified of the switching of the display mode and the display mode before the switching and the display mode after the switching.

  For example, when the transmission loss rate and the electric field intensity exceed the threshold set in the display form switching determination information, the display form is switched from the one-segment broadcast display form to the 12-segment broadcast display form, and the 12-segment broadcast display form. To the one-seg broadcast display mode.

  Specifically, when the transmission loss rate increases beyond the threshold, or when the electric field strength decreases beyond the threshold, the display mode is switched from the 12-segment broadcast display mode to the one-segment broadcast display mode, and the transmission loss rate is the threshold value. When the electric field intensity increases beyond the threshold, the display mode is switched from the one-segment broadcasting display mode to the 12-segment broadcasting display mode.

  The subtitle display instruction control unit 54 that has received this notification reads the “subtitle display setting information” stored in the information storage unit 53 and performs display control of the subtitle information.

  In the subtitle information display control performed by the subtitle display instruction control unit 54, the display mode is switched from the one-segment broadcasting display mode to the 12-segment broadcasting display mode, or the 12-segment broadcasting display mode is switched to the one-segment broadcasting display mode. It is judged whether it was switched.

  First, when it is determined that the display mode has been switched from the one-segment broadcasting display format to the 12-segment broadcasting display format, it is effective to display subtitle information as an initial setting based on “subtitle display setting information”. Determine whether it is enabled or disabled.

  When it is determined by this determination process that the information is “invalid”, that is, when the initial setting is not to display the caption information in the video information, the caption information corresponding to the switched display form is displayed. Valid.

  In this way, when the display of subtitle information is switched from invalid to valid, the subtitle information to be displayed along with the switched display form is continuously displayed for a certain period of time. Judgment based on information. When the setting for displaying subtitle information continuously for a certain period of time is set to “subtitle display setting information”, it corresponds to the video information of the one-segment broadcasting that is the display form before switching for the set constant time. The information analysis unit 103 is instructed to display caption information for one-segment broadcasting (hereinafter referred to as “one-segment broadcasting caption information”). Note that the display of caption information is switched from valid to invalid after a certain period of time.

  On the other hand, when the setting for displaying subtitle information continuously for a certain period of time is not set to “subtitle display setting information”, subtitle information corresponding to the video information of the one-segment broadcasting which is the switched display form is displayed. The information analysis unit 103 is instructed to display only the delay time generated when receiving the one-segment broadcast and the 12-segment broadcast.

  The “delay time” at this time is set according to the broadcast content of the digital broadcast.

  For example, it is determined from the MPEG-2 TS packet whether the broadcast content of the digital broadcast is a live broadcast or a broadcast that has been created and recorded in advance, and if it is determined to be a live broadcast, the broadcast source of the identified channel The time for outputting the caption information is calculated in consideration of the past reception state and the like in the live broadcast received from, and the time is set as the delay time.

  Furthermore, it is “valid” to display subtitle information by determining whether to display subtitle information as an initial setting based on “subtitle display setting information” is valid or invalid. In other words, when the subtitle information is set to be displayed together with the video information as an initial setting, it is further specified that the subtitle information is displayed in combination by the “subtitle display setting information”. Judgment is made.

  When it is set to perform the merge display, caption information corresponding to the video information of 12-segment broadcasting after switching the display form (hereinafter referred to as “subtitle information for 12-segment broadcasting”), and 12-segment broadcasting From the reception of the 12-segment broadcast video information to the reception of the one-segment broadcast video information by merging with the one-segment broadcast subtitle information corresponding to the one-segment broadcast video information received when switching to the display mode The information analysis unit 103 is instructed to display for the delay time. After the combined display of the delay times, the information analysis unit 103 is instructed to display the 12-segment broadcast subtitle information corresponding to the 12-segment broadcast video information that is the display form after switching.

  On the other hand, if it is not set to perform merged display, it is set to perform adjustment control that adjusts subtitle information and video information in synchronization within a certain time in “Subtitle Display Setting Information”. Judge whether it has been.

  If the subtitle display setting information is not set to perform adjustment control for adjusting subtitle information and video information within a certain period of time, when the display mode is switched to 12-segment broadcasting, The information analysis unit 103 displays an instruction to display the one-segment broadcasting subtitle information corresponding to the video information received in the display form for the delay time from the reception of the 12-segment broadcasting video information to the reception of the one-seg broadcasting video information. To do. After the combined display of the delay times, the information analysis unit 103 is instructed to display the 12-segment broadcast subtitle information corresponding to the 12-segment broadcast video information that is the display form after switching.

  On the other hand, when it is set in the “subtitle display setting information” to perform adjustment control for adjusting the subtitle information and the video information within a predetermined time, the video information of the 12-segment broadcast in the display form after switching 12-segment broadcasting subtitle information corresponding to the video information within a certain period of time and one-segment broadcasting subtitle information corresponding to the video information in the display format of the one-segment broadcasting received after switching to the 12-segment broadcasting. The information analysis unit 103 is instructed to display subtitle information by performing adjustment control to be synchronized within a certain time.

  Next, when it is determined that the display mode has been switched from the 12-segment broadcasting display mode to the one-segment broadcasting display mode, it is effective to display the subtitle information as an initial setting based on the “subtitle display setting information”. It is determined whether or not.

  When it is determined by this determination process that the information is “invalid”, that is, when the initial setting is not to display the caption information in the video information, the caption information corresponding to the switched display form is displayed. Valid.

  In this way, when the display of subtitle information is switched from invalid to valid, the subtitle display setting information is set to indicate whether or not the subtitle information to be displayed together with the switched display form is displayed continuously for a certain period of time. Judge based. When the setting for displaying subtitle information continuously for a certain period of time is set to “Subtitle display setting information”, it corresponds to the video information of the one-segment broadcasting that is the display form after switching for the set constant time. The information analysis unit 103 is instructed to display the one-segment broadcasting subtitle information (hereinafter referred to as “one-segment broadcasting subtitle information”). Note that the display of caption information is switched from valid to invalid after a certain period of time.

  On the other hand, if the setting for displaying subtitle information continuously for a certain period of time is not set in “Subtitle display setting information”, for one-segment broadcasting corresponding to the video information of the one-segment broadcasting that is the switched display form The information analysis unit 103 is instructed to display the caption information for the delay time generated when receiving the one-segment broadcasting and the 12-segment broadcasting.

  It is "valid" to display subtitle information by determining whether subtitle information display is enabled or disabled as an initial setting based on "subtitle display setting information" In other words, when the subtitle information is set to be displayed together with the video information as an initial setting, the one-segment broadcasting subtitle information corresponding to the video information for the one-segment broadcasting that is the display form after switching is displayed. An instruction to display is given to the information analysis unit 103.

  FIG. 4 is a block diagram showing a detailed configuration of the information analysis unit 103 shown in FIG.

  4, the information analysis unit 103 includes a signal separation processing unit (DEMUX) 30, a one-segment video / audio decoder 31, a 12-segment video / audio decoder 32, a video / audio output state switching control unit 33, a caption non-display function 34, a one-segment display Subtitle decoder 35, 12-segment subtitle decoder 36, subtitle output state switching control unit 37, subtitle information merging control unit 38, output control unit 39, and subtitle information storage unit 40.

  The digital broadcast information sent from the reception data processing unit 102 shown in FIG. 1 is received by the signal separation processing unit 30. The signal separation processing unit 30 performs processing for separating the multiplexed digital broadcast information transmitted into video information and audio information (referred to as “video / audio information”) and subtitle information, and further includes video / audio information and The subtitle information is separated for each display form (one-segment broadcasting, 12-segment broadcasting). In the signal separation processing unit 30, the type of the packet is identified by the PID of the MPEG-2 TS packet and separated.

  The signal separation processing unit 30 sends the video / audio information in the one-segment broadcast display format to the one-segment video / audio decoder 31 and sends the video / audio information in the 12-segment broadcast display format to the 12-segment video / audio decoder 32. Then, the subtitle information in the one-segment broadcast display form is sent to the one-segment subtitle decoder 35, and the subtitle information in the 12-segment broadcast display form is sent to the 12-segment subtitle decoder 36.

  The one-segment video / audio decoder 31 decodes the video / audio information into data corresponding to the one-segment broadcast, and the 12-segment video / audio decoder 32 decodes the video / audio information into data corresponding to the 12-segment broadcast. Perform the decoding process. The one-segment subtitle decoder 35 decodes subtitle information into data corresponding to the one-segment broadcast, and the 12-segment subtitle decoder 36 decodes subtitle information into data corresponding to the 12-segment broadcast. Process.

  The video / audio output state switching control unit 33 receives a display mode switching display instruction from the information control processing unit 105 illustrated in FIG. 1 and performs display switching control to a display mode corresponding to the switching display instruction. That is, the video / audio output state switching control unit 33 can send the video / audio information decoded by either the one-segment video / audio decoder 31 or the 12-segment video / audio decoder 32 to the output control unit 39. Switch to.

  For example, when the video / audio output state switching control unit 33 is switched to the one-segment video / audio decoder 31 (when the one-segment video / audio decoder 31 is enabled), the video / audio for one-segment broadcasting from the one-segment video / audio decoder 31 is used. Information is sent to the output control unit 39. Further, when the video / audio output state switching control unit 33 is switched to the 12-segment video / audio decoder 32 (when the 12-segment video / audio decoder 32 is enabled), the 12-segment broadcasting from the 12-segment video / audio decoder 32 is performed. Video / audio information is sent to the output control unit 39.

  The subtitle output state switching control unit 37 receives a subtitle display state switching display instruction from the information control processing unit 105 shown in FIG. 1, and performs display switching control to a subtitle display state according to the switching display instruction. That is, the subtitle output state switching control unit 37 performs switching so that the subtitle information decoded by either the one-segment subtitle decoder 35 or the 12-segment subtitle decoder 36 can be sent to the output control unit 39. .

  For example, when the subtitle output state switching control unit 37 is switched to the one-segment subtitle decoder 35 (when the one-segment subtitle decoder 35 is enabled), the one-segment broadcasting subtitle information from the one-segment subtitle decoder 35 is output to the output control unit. 39. When the subtitle output state switching control unit 37 is switched to the 12-segment subtitle decoder 36 (when the 12-segment subtitle decoder 36 is enabled), the subtitle information for 12-segment broadcasting from the 12-segment subtitle decoder 36 is displayed. Is sent to the output control unit 39.

  The subtitle information decoded by the one-segment subtitle decoder 35 and the 12-segment subtitle decoder 36 is stored in the subtitle information storage unit 40 in association with video information (one-segment broadcast, 12-segment broadcast) according to the display form. The The caption information storage unit 40 may be configured to be realized by the information control processing unit 105 shown in FIG.

  When the subtitle display video / audio display switching process is performed, the video / audio output state switching control unit 33 sends the display mode before switching and the display mode after switching to the subtitle information merging control unit 38. Further, when the subtitle output state switching control unit 37 is instructed by the information control processing unit 105 to display the subtitle information in combination, the subtitle output state switching control unit 37 displays the information based on this instruction, the subtitle information display mode before switching, and the display mode after switching. It is sent to the caption information merging control unit 38.

  When the caption information merging control unit 38 receives information from the caption output state switching control unit 37 based on the caption information merging display instruction and the display format of the caption information before switching and the display format after switching, the caption information storage unit 40 The subtitle information stored in the above is read out, the subtitle information is merged based on the instruction information, and the merged subtitle information is sent to the output control unit 39.

  The subtitle output state switching control unit 37 switches to the subtitle non-display function 34 when the information control processing unit 105 is instructed not to display the subtitle information, and switches to the one-segment subtitle decoder 35 and the 12-segment subtitle decoder. The subtitle information is not sent from the decoder 36 to the output control unit 39.

  The output control unit 39 performs processing to output the video / audio information transmitted from the one-segment video / audio decoder 31 and the 12-segment video / audio decoder 32, and transmits from the one-segment subtitle decoder 35 and the 12-segment subtitle decoder 36. Processing to superimpose and output the subtitle information that has been performed is performed. At this time, when subtitle information merge display is instructed by the subtitle information merge control unit 38, the merged subtitle information received from the subtitle information merge control unit 38 is received, and the one-segment subtitle decoder 35 and the 12-segment subtitle information are used. The subtitle information sent from the subtitle decoder 36 is discarded.

  In this way, the transmitted video / audio information and subtitle information are synchronized and output to the display 110.

  5, 6, 8, and 9 are timing charts showing the output state of the video / audio information and the output state of the caption information in time series.

  5, 6, 8, and 9, the reception status of the 12-segment broadcast video / audio information at a predetermined timing and the reception of the one-segment broadcast video / audio information at the timing of the reception status of the 12-segment broadcast video / audio information. In addition to the status, a display state in which one of the 12-segment broadcast video / audio information and the one-segment broadcast video / audio information is displayed. Furthermore, output states of subtitle information for 12-segment broadcasting corresponding to video / audio information for 12-segment broadcasting and subtitle information for one-segment broadcasting corresponding to video-audio information for one-segment broadcasting are shown.

  In these figures (FIGS. 5, 6, 8, and 9), the video / audio information is divided into “video / audio information units” having an arbitrary information capacity (size). The information unit is represented by a rectangular block. In addition, subtitle information is expressed by dividing it into “subtitle information units” which are arbitrary information capacities (sizes), and the subtitle information units are represented by rounded rectangular blocks with rounded corners.

  Since the video / audio information and the subtitle information are linked and received, the output interval (width) of the video / audio information in units of video / audio information and the output interval (width) of the subtitle information in units of subtitle information are equal or limited. It shows that it is in an approximate state. Furthermore, since the video / audio information for one-segment broadcasting and the video / audio information for 12-segment broadcasting are simulcast, the output interval (width) of each video / audio information is equal or infinitely approximated. The output interval (width) of each corresponding subtitle information is also equal or approximated as much as possible.

  Note that the video / audio information in units of video / audio information and the caption information corresponding to the video / audio information are output at the same intervals and at the same timing.

  In FIGS. 5, 6, 8, and 9, the output interval (width) is the delay time from the reception of the 12-segment broadcast digital broadcast information to the reception of the one-segment broadcast digital broadcast information. Represents the case. That is, the 12-segment broadcast video / audio information and the one-segment broadcast video / audio information are received with a delay of one block.

  The state of reception delayed by one block is shown in FIG. 5, FIG. 6, FIG. 8, and FIG. 9, respectively, in the timing chart in the "12-segment broadcast video / audio information reception state" and "one-segment broadcast video / audio information reception state". The timing chart in FIG.

  In such a reception state, when the “block 99” of the 12-segment broadcast video / audio information is received and the “block 98” of the one-segment broadcast video / audio information is received, the display form is changed. In this case, the display point is “switching point A” and “block 250” of 12-segment broadcast video / audio information and “2-block 49” of one-segment broadcast video / audio information. The point when the change is made is indicated as “switching point B”.

  In such a case, the output state of the video / audio information is when the state in which the 12-segment broadcast video / audio information is output continues from “Block 1” to “Block 99” and becomes “Switching point A”. When the display form is switched from 12-segment broadcasting to one-segment broadcasting, “block 99” of 12-seg broadcast video / audio information is output, and then “block 99” of one-seg broadcast video-audio information is output.

  In addition, when the display form is switched from 12-segment broadcasting to one-segment broadcasting and “block 99” to “block 249” of video / audio information for one-segment broadcasting is output, then “switching point B” is displayed. When the form is switched from 1-segment broadcasting to 12-segment broadcasting, “block 249” of video / audio information for 1-segment broadcasting is output, and then “block 251” of video / audio information for 12-segment broadcasting is output.

  In such a state, in FIG. 5, first, “invalid” is determined by determining whether or not the display of subtitle information as an initial setting based on “subtitle display setting information” is valid or invalid. In other words, the output state of video / audio information and the output state of subtitle information in the case where it is determined that the subtitle information is not displayed in the video information as an initial setting are shown.

  According to the output state of the video / audio information as described above, the subtitle information corresponds to the output state 1 of the subtitle information. The subtitle information corresponds to the one-segment broadcast video / audio information after the display form is switched at the switching point A by one block. It shows a state (min. “Block 99”), that is, a state in which the digital broadcast information for 12-segment broadcasting is received and the delay time from when the digital broadcasting information for one-segment broadcasting is received is output. Further, the subtitle information corresponding to the 12-segment broadcast video / audio information after the display mode is switched at the switching point B is output for one block (“block 250”).

  As the subtitle information output state 2 with respect to the subtitle information output state 1, the subtitle information has been set in advance to display the subtitle information continuously for a certain period of time. Shows the state that subtitle information corresponding to the one-segment broadcasting video / audio information is output for the number of blocks corresponding to a certain time, and corresponds to the video / audio information for 12-segment broadcasting after the display mode is switched at the switching point B The subtitle information is output for the number of blocks corresponding to the certain time. In the example shown in FIG. 5, the number of blocks corresponding to a certain time is 3 blocks (“Block 99”, “Block 100”, “Block 101”) or 4 blocks (“Block 250”, “Block 251”, “Block 252”). , “Block 253”). That is, it is possible to set different fixed times according to the switching contents of the display form, and it is possible to output the number of blocks corresponding to the fixed time according to the switching contents of each display form.

  Next, FIG. 6 determines that “displaying subtitle information as an initial setting based on“ subtitle display setting information ”is“ enabled ”by determining whether it is enabled or disabled. The output state when the subtitle information is set to be merged and displayed is shown.

  Depending on the output state of the video / audio information as described above, the subtitle information is output from “block 1” of the 12-segment broadcast video / audio information to “block 99” immediately before “switching point A”. After the display mode is switched at the switching point A, the subtitle information corresponding to the one-segment broadcasting video / audio information in the switched display mode is output from “Block 99” to “Block 249”. It shows the state. At this time, the subtitle information output before and after “switching point A” is a state in which “block 99” of 12-segment broadcast subtitle information and “block 99” of one-segment broadcast subtitle information are continuously output. Show.

  Also, by switching the display form at the switching point B, the 12-segment broadcasting subtitle information (“block 251”) corresponding to the 12-segment broadcasting video / audio information after switching and the one-segment broadcasting video received after switching. The one-segment broadcasting subtitle information (“block 250”) corresponding to the audio information is merged with the 12-segment broadcasting video / audio information (“block 251”), so that one block, that is, 12-segment broadcasting digital broadcasting information is obtained. Only the delay time from reception to reception of digital broadcast information for one-segment broadcasting is output, and thereafter, subtitle information corresponding to the switched 12-segment broadcast video / audio information is output.

  FIG. 7 shows a state in which caption information is displayed by this merge.

  In FIG. 7, FIG. 7A shows a state in which the caption information of “block 249” corresponding to the one-segment broadcasting video / audio information is displayed together with the one-segment broadcasting video / audio information of “block 249” before the display mode is switched. Is shown.

  FIG. 7B corresponds to the 12-segment broadcast subtitle information (“block 251”) corresponding to the 12-segment broadcast video / audio information after switching the display form and the one-segment broadcast video / audio information received after the switch. 1-segment broadcasting subtitle information ("Block 250") is shifted up and down, 12-segment broadcasting subtitle information ("Block 251") is shifted to the left side, and 1-Seg broadcasting subtitle information ("Block 250") is shifted to the right side. The state of merging is shown.

  FIG. 7C corresponds to the 12-segment broadcast subtitle information (“block 251”) corresponding to the 12-segment broadcast video / audio information after switching the display form and the one-segment broadcast video / audio information received after the switch. The one-segment broadcasting subtitle information (“block 250”) to be displayed is merged so as to be displayed in the center of the screen as the top and bottom.

  FIG. 7D shows the 12-segment broadcast video / audio information together with the 12-segment broadcast video / audio information after displaying the video / audio information superimposed with the caption information as shown in FIG. 7B or 7C. 1Seg subtitle information corresponding to is displayed.

  Next, in FIG. 8, it is determined that the display of the caption information as the initial setting based on the “caption display setting information” is enabled or disabled by determining whether it is enabled or disabled. This shows the output state when the subtitle information is not set to be merged and displayed and the output time adjustment control is set.

  Depending on the output state of the video / audio information as described above, the subtitle information indicates a state in which the 12-segment broadcast video / audio information is output from “Block 1” to “Block 99” immediately before “Switching point A”. After the display mode is switched at the switching point A, the subtitle information corresponding to the one-segment broadcasting video / audio information in the display mode after switching is output from “block 99” to “block 249”. Yes. At this time, the subtitle information output before and after “switching point A” is a state in which “block 99” of 12-segment broadcast subtitle information and “block 99” of one-segment broadcast subtitle information are continuously output. Show.

  Further, by switching the display form at the switching point B, the subtitle information for sub-segment information (“block 250”) received after the display form is switched as the output state of the subtitle information is the 12-segment broadcast after switching. Output from the 12-segment broadcast subtitle information (“block 251”) corresponding to the switched 12-segment broadcast video / audio information (4 blocks in FIG. 8 (“block” in FIG. 8). 251 "," Block 252 "," Block 253 "," Block 254 "))) and the adjusted subtitle information together with the 12-segment broadcast video / audio information.

  As this adjustment processing, when the number of blocks of the 12-segment broadcast video / audio information output at the output time is “3”, the subtitle information (“block 251,” “block 252,” “ "Block 253" and "Block 254") are output after being adjusted to an output interval (width) obtained by dividing the number of blocks of subtitle information output at the output time by the number of blocks of video / audio information output at the output time. The In this example, since the number of subtitle information blocks output at the output time is “4” and the number of blocks of video / audio information output at the output time is “3”, “3/4” The output interval (width) is adjusted to be output.

  Next, in FIG. 9, it is determined that the display of the caption information as an initial setting based on the “caption display setting information” is enabled or disabled by determining whether it is enabled or disabled. This shows the output state when the subtitle information is not set to be merged and displayed, and the output time adjustment control is not set.

  Depending on the output state of the video / audio information as described above, the subtitle information is equivalent to one block (“block 99”) of subtitle information corresponding to the video / audio information for one-segment broadcasting after the display form is switched at the switching point A. That is, it shows a state in which only a delay time from when digital broadcast information for 12-segment broadcasting is received until when digital broadcast information for one-segment broadcasting is received is output. Further, the subtitle information corresponding to the 12-segment broadcast video / audio information after the display mode is switched at the switching point B is output for one block (“block 250”).

  FIG. 10 is a flowchart showing a flow of processing performed in the information display control device configured by applying the information display control device, the information display control method, the information display control program, and the recording medium according to the embodiment of the present invention.

  It is determined whether or not “digital broadcast information” such as video information, audio information, and caption information captured and created at the transmission station has been received by the tuner (S1001), and the process is not started until digital broadcast information is received. If it is determined that the digital broadcast information has been received by the tuner (YES in step S1001), each piece of information (video information, audio information, subtitle information, etc.) of the received compressed and encoded digital broadcast information is decoded. Processing is performed (S1002).

  If the decoding process of the digital broadcast information is performed, then the channel decoding process is performed on the decoded digital broadcast information (S1003), and information about the reception state of the digital broadcast information received by the tuner (“reception state information”). Registration processing of information to be managed is performed (S1004).

  Next, based on this "display mode switching determination information", it is detected whether the reception status of digital broadcast information has dropped or increased beyond a threshold while monitoring the reception status (field strength or transmission loss rate). Thus, it is determined whether a display mode switching event has occurred (S1005).

  When it is determined that a switching event has occurred due to a decrease in electric field strength for receiving digital broadcast information (YES in S1005), the one-segment broadcast subtitle information is output based on the display instruction for the one-segment broadcast subtitle information. At the same time, output control processing for outputting video / audio information in the display form after switching is performed (S1006).

  Flowcharts showing the detailed flow of this output control processing are shown in FIGS. 11 and 12, and will be described later.

  On the other hand, if it is not determined that a switching event has occurred (NO in S1005), the output control process for the digital broadcast information received by the tuner is continued (S1007).

  In this way, when the digital broadcast information output control process corresponding to the display form is performed, it is subsequently determined whether the reception of the digital broadcast information has been completed (S1008). If it is determined that the reception of the digital broadcast information has been completed (YES in S1008), the processing in this flowchart is terminated, and if it is not determined that the reception of the digital broadcast information has been completed (NO in S1008), it is received. It repeats from the process of S1002 which performs a decoding process with respect to the digital broadcast information which is being carried out.

  FIG. 11 is a flowchart showing a detailed flow of the output control process in the case where the display mode switching event for outputting the digital broadcast information shown in FIG. 10 occurs.

  In FIG. 11, it is determined whether the switching event that has occurred is an event for switching the display form from one-segment broadcasting to twelve-segment broadcasting (S1101).

  First, if it is determined that this is an event for switching from 1-segment broadcasting to 12-segment broadcasting (YES in S1101), if an event occurs due to a shift to a state where electric field strength when receiving digital broadcasting information is high Then, the display form of the video / audio information is switched from the video / audio information of the one-segment broadcasting to the video / audio information of the 12-segment broadcasting (S1102).

  At this time, it is determined whether the set caption information is in a non-display state (OFF) (S1103).

  If the caption information is in a non-display state (OFF) (YES in S1103), it is subsequently determined whether or not the display setting for continuously displaying the caption information for a certain period of time is set (S1104). If the display setting for continuous display for a certain period of time is set (YES in S1104), an instruction to display and output the one-segment broadcasting subtitle information is issued for the set period of time (S1105).

  In addition, if the display setting for continuously displaying for a certain time is not set (NO in S1104), the instruction to display and output the one-segment broadcasting subtitle information for the delay time (time lag) between the one-segment broadcasting and the 12-segment broadcasting. (S1106).

  Thus, when display output of subtitle information is instructed, subtitle information is displayed based on the instructed display output (S1107), and initially set subtitle information is displayed in a non-display state (OFF). The state is restored (S1108).

  On the other hand, when the subtitle information is not in the non-display state (OFF) and the subtitle information is displayed (ON) (NO in S1103), “Subtitle It is determined whether or not subtitle information is set to be displayed together with the subtitle information display setting based on “display setting information” (S1109).

  If the subtitle information display setting based on the “subtitle display setting information” is set to display the subtitle information together (YES in S1109), the “one segment” corresponding to the delay time of the one-segment broadcasting and the 12-segment broadcasting is set. "Subtitle information for broadcasting" and "Subtitle information for 12-segment broadcasting" are merged with the switched 12-segment broadcasting video / audio information (S1110). Then, a display output of the caption information is instructed (S1111).

  In addition, when the display setting of the subtitle information based on the “subtitle display setting information” is not set to display the subtitle information together (NO in S1109), the setting for adjusting the output time is subsequently performed. It is determined whether or not (S1112).

  If output time adjustment control is set (YES in S1112), subtitle information for 12-segment broadcasting is necessary for synchronization at a subtitle information display interval that is synchronized within a predetermined time specified in advance. An instruction to display and output the corresponding subtitle information is issued (S1113). If the setting for adjusting the output time is not set (NO in S1112), an instruction to display and output the one-segment broadcasting subtitle information for the delay time of the one-segment broadcasting and the 12-segment broadcasting is given (S1114). ).

  Then, the caption information based on the instructed display output is superimposed on the video / audio information and displayed (S1115).

  With the configuration as described above, the information display control device described in the present embodiment is capable of missing video information and audio information caused by delay in reception of broadcasting when switching from one-segment broadcasting to 12-segment broadcasting. The portion can be complemented by displaying the caption information corresponding to the one-segment broadcasting.

  Thereby, the viewer can understand the missing part of the video information and the audio information by the supplemented caption information. Further, even when the user sets the subtitle display setting to non-display (off setting), the subtitle information is only displayed for a predetermined time corresponding to the missing time when switching between the one-segment broadcasting and the 12-segment broadcasting. Since the display is set to be set (ON setting), it is possible to minimize the display of subtitle information so as to conform to the original user's intention.

  Next, a flowchart showing a detailed processing flow when an event for switching from 12-segment broadcasting to one-segment broadcasting has occurred (NO in S1101), not when an event for switching from one-segment broadcasting to 12-segment broadcasting has occurred. 12 shows.

  In FIG. 12, when an event occurs due to a shift to a high radio wave intensity when receiving digital broadcast information, an event for switching from 12-segment broadcasting to one-segment broadcasting occurs. Switching from Seg broadcasting to One Seg broadcasting (S1201).

  At this time, it is determined whether the set caption information is in a non-display state (OFF) (S1202). If the subtitle information is in a non-display state (OFF) (YES in S1202), it is then determined whether or not the subtitle information is set to be displayed continuously for a predetermined time (S1203).

  If it is set to display subtitle information continuously for a certain time (YES in S1203), the one-segment broadcasting subtitle information is continuously displayed for a predetermined time (S1204).

  Also, if the subtitle information is not in the non-display state (OFF) (NO in S1202), and if the subtitle information is not set to be displayed continuously for a certain time (NO in S1203), the one-segment broadcasting An instruction to display and output the subtitle information for the delay time between the one-segment broadcasting and the 12-segment broadcasting is issued (S1205).

  And it transfers to the position of the transition destination B shown in FIG. 11, and superimposes the subtitle information based on the instructed display output on the video / audio information (S1115).

  The embodiment described above is one embodiment of the present invention, and is not limited to these examples, and can be implemented with appropriate modifications within a range not changing the gist thereof.

  The present invention installs the program in a computer from a recording medium (CD-ROM, DVD-ROM, etc.) storing the program for configuring the above-described means, and executes the program to execute the above-described processing. It is also possible to configure a computer to execute. At this time, a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and a hard disk are connected to the computer via a system bus, and the CPU is a program stored in the ROM or the hard disk. Accordingly, the RAM is used as a work area for processing.

  The medium for supplying the program may be a recording medium (a medium for temporarily or fluidly holding the program such as a communication line or a communication system). For example, the program may be posted on an electronic bulletin board (BBS: Bulletin Board Service) of a communication network and distributed via a communication line.

30 Signal separation processing unit (DEMUX)
31 one-segment video / audio decoder 32 12-segment video / audio decoder 33 video / audio output state switching control unit 34 subtitle non-display function 35 one-segment subtitle decoder 36 12-segment subtitle decoder 37 subtitle output state switching control unit 38 subtitle information merge control unit 39 Output control unit 40 Subtitle information storage unit 50 Information registration control unit 51 Reception state information storage unit 52 Display mode switching determination control unit 53 Information storage unit 54 Subtitle display instruction control unit 100 Information display control device 101 Tuning processing unit 102 Reception data processing Unit 103 Information analysis unit 104 Storage unit 105 Information control processing unit 110 Display display

Claims (10)

First information receiving means for receiving first video information and first character information based on the content of the first video information;
Second information receiving means for receiving second video information having the same type of content as the first video information but different from the first video information and second character information based on the content of the second video information When,
Character information storage means for storing the second character information received by the second information receiving means in association with the second video information;
Display means for displaying any one of the first video information received by the first information receiving means and the second video information received by the second information receiving means;
Display switching means for performing display switching between the first video information and the second video information displayed by the display means;
When display switching from the second video information to the first video information is performed by the display switching means, the character information storage means stores the second video information associated with the second video information after the display switching. An information display control device comprising: output control means for controlling output of the second character information together with the first video information after display switching. The output control means includes
The information display control device according to claim 1, wherein the second character information stored in the character information storage means is continuously output together with the first video information after switching for a specified period specified in advance. The first character information corresponding to the first video information after switching, in which the display switching is performed from the second video information by the display switching means, and the second information receiving means received by the second information receiving means after the display switching. Merging means for merging the second character information corresponding to the second video information;
The output control means includes
The output control of the first video information is performed by superimposing the second character information and the first character information merged by the merging unit on the first video information after switching. Information display control device. The output control means includes
After the second character information stored in the character information storage means in association with the second video information before switching is output together with the first video information after switching by the display switching means, 3. The information display according to claim 1, wherein the first character information corresponding to the next first video information is output together with the next first video information received by the first information receiving means displayed following the first video information. Control device.   Constantly using the second character information stored in the character information storage means in association with the second video information before switching and the first character information corresponding to the first video information after switching The information display control device according to claim 1, further comprising adjustment control means for performing adjustment control for synchronizing the first video information and the output state in time. Display setting determining means for determining whether or not to display the first character information together with the first video information or the second character information together with the second video information on the display means. The information display control apparatus according to claim 3. The display switching means includes
A reception state determination unit that determines a reception state of the first information reception unit and the second information reception unit using a predetermined threshold value;
Display switching presence / absence determining means for determining whether or not display switching between the first video information and the second video information is performed according to a relationship between the reception state determined by the reception state determination unit and the threshold value;
7. The information display control according to claim 1, wherein display switching is performed between the first video information and the second video information when the display switching presence / absence determining unit determines that the display switching is to be performed. apparatus. An information display control method used in an information display control device,
A first information receiving step of receiving first video information and first character information based on the content of the first video information;
A second information receiving step of receiving second video information having the same type of content as the first video information but different from the first video information and second character information based on the content of the second video information When,
A character information storage step of storing the second character information received in the second information reception step in association with the second video information;
A display step of displaying one of the first video information received by the first information receiving step and the second video information received by the second information receiving step;
A display switching step of performing display switching between the first video information and the second video information displayed by the display step;
When the display is switched from the second video information to the first video information by the display switching step, the second video information stored in the character information storage step after the display switching is associated with the second video information. An output control step of controlling output of the second character information together with the first video information after display switching.   An information display control program for causing an arithmetic means to execute the information display control method according to claim 8.   10. A recording medium, wherein the information display control program according to claim 9 is made readable by a calculation means.

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