JP4237721B2 - Reproduction method and apparatus - Google Patents

Description

  The present invention relates to a reproduction technique, and more particularly to a reproduction method and apparatus for reproducing a recorded program.

In recent years, recording of moving images using a recording medium that allows easy random access to recorded data, such as a DVD (Digital Versatile Disc) and a hard disk magnetic recording medium (hereinafter also simply referred to as “hard disk”), has begun to spread. Yes. In particular, as the capacity and cost of hard disks have increased, hard disk recorders, which are image recording / playback apparatuses using hard disks, have been commercialized (for example, see Patent Document 1). Among such hard disk recorders, there is also an apparatus capable of recording a program exceeding 100 hours.
JP 2004-72727 A

  The present inventor has come to recognize the following problems. If the recording time in the hard disk recorder becomes longer, many programs will be recorded. In consideration of user convenience, it is preferable that a desired program can be easily searched when a desired program is reproduced from a plurality of recorded programs. For this reason, there are also devices that search for programs recorded with keywords or the like. However, there are cases where the user wants to see a limited scene in the program even though the user can search for the program that he / she is interested in by means such as specifying a keyword. That is, there are cases where it is desired to watch only desired news if it is a news program, desired singer if it is a music program, or only a desired player if it is a sports program. Until now, in order to search for a scene to be viewed in one program, a method of fast-forwarding the program and waiting until the scene to be viewed has been played back has been executed.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a reproduction technique for searching for a recorded program by using a part of one program as a unit.

  In order to solve the above problems, a playback apparatus according to an aspect of the present invention includes a receiving unit that receives a broadcast program, a recording unit that records the program received by the receiving unit, and a program recorded in the recording unit. Among them, an information reproducing unit that displays information data linked to video data on a display device, a receiving unit that receives a selection instruction for information data displayed by the information reproducing unit, and a selection instruction received in the receiving unit And a video playback unit that plays back video data of the program recorded in the recording unit from the elapsed time of the program corresponding to.

  “Program” refers to a program that is being broadcast, but here the content is also included. That is, the program may indicate broadcast audio, broadcast video, and combinations thereof.

  According to this aspect, in order to search a part of the video data, the information data linked to the video data is displayed, and an instruction to select the displayed information data is received, so a part of the recorded program can be searched. .

  The information data of the program received by the receiving unit includes a plurality of information, and the information reproducing unit obtains a plurality of information from the recording unit in the order recorded in the recording unit, and an acquisition unit When the acquired information is different from the previously acquired information, the detection unit for detecting the update of the information, and when the detection unit detects the update of the information, the display of the content of the previously acquired information has elapsed for a predetermined period of time. Then, an instruction unit that displays the updated information on the display device may be included. In this case, since only the information data is displayed in order, the display of the content of the information data can be speeded up, and the content of one piece of information is displayed for a predetermined period, so that the display of the content of the information data can be executed reliably.

  The information data of the program received by the receiving unit includes a plurality of information, and the information reproducing unit obtains a plurality of information from the recording unit in the order recorded in the recording unit, and an acquisition unit A detection unit that detects an update of information when the acquired information is different from the previously acquired information, and a part of the display area of the display device when an update of the information is detected by the detection unit And an instruction unit that displays the content of the previously acquired information in another area while displaying the updated information. In this case, since a plurality of information data are listed, it is possible to reliably display the contents of the information data.

  The video data of the program received by the receiving unit includes a frame that is encoded without using other frames and a frame that is encoded while using other frames. Is generated, the information including the elapsed time of the program corresponding to the frame encoded without using other frames is generated, and the reception unit receives a plurality of information included in the information data as a selection instruction. The video playback unit receives an instruction to select one of the information items, and refers to the information generated by the recording unit, based on the elapsed time of the program corresponding to the selection instruction received by the reception unit. There may be included means for specifying a frame to be encoded without using this frame and means for executing reproduction from the specified frame. In this case, reproduction is performed from a frame that is encoded without using other frames, so that video data can be reliably reproduced.

  In the video playback unit, if the elapsed time of the program corresponding to the selection instruction received in the reception unit corresponds to a frame encoded using another frame, the selection instruction received in the reception unit The reproduced video data may be displayed on the display device from the elapsed time of the corresponding program. In this case, since the display is started from the elapsed time of the program corresponding to the instruction, the display corresponding to the instruction can be executed.

  Another aspect of the present invention is a reproduction method. This method is a playback method for playing back a recorded program, in which information data linked to video data is displayed on a display device, and an instruction to select the displayed information data is recorded. By accepting, the video data of the recorded program is reproduced from the elapsed time of the program corresponding to the accepted selection instruction.

  Yet another embodiment of the present invention is also a reproduction method. The method includes a step of receiving a broadcast program, a step of recording the received program, a step of displaying information data linked to video data on the display device among the recorded programs, and a display Receiving a selection instruction for the received information data, and reproducing video data of the recorded program from the elapsed time of the program corresponding to the received selection instruction.

  The information data of the program received in the receiving step includes a plurality of information, and the step of displaying the information data on the display device includes the step of acquiring the plurality of information in the order of recording, and the acquired information Is different from the previously acquired information, the step of detecting the update of information, and when the update of information is detected, the display of the content of the previously acquired information is updated if a predetermined period has passed. Displaying the information on the display device.

  The information data of the program received in the receiving step includes a plurality of information, and the step of displaying the information data on the display device includes the step of acquiring the plurality of information in the order of recording, and the acquired information If the information is different from the previously acquired information, the step of detecting the update of information, and when the information update is detected, the updated information is displayed in a part of the display area of the display device. And displaying the content of the previously acquired information in another area.

  The video data of the program received in the receiving step includes a frame that is encoded without using other frames and a frame that is encoded while using other frames. When recording is performed, the step of generating information including the elapsed time of the program corresponding to the frame encoded without using other frames and receiving the instruction is performed on the information data as a selection instruction. The step of accepting an instruction to select one of the plurality of included information and reproducing the video data is based on the elapsed time of the program corresponding to the accepted instruction of selection while referring to the generated information. A frame to be encoded may be specified without using another frame, and reproduction may be executed from the specified frame.

  In the step of reproducing the video data, if the elapsed time of the program corresponding to the accepted selection instruction corresponds to a frame encoded using another frame, the program corresponding to the accepted selection instruction From the elapsed time, the reproduced video data may be displayed on the display device.

  It should be noted that any combination of the above-described constituent elements and a conversion of the expression of the present invention between a method, an apparatus, a system, a recording medium, a computer program, etc. are also effective as an aspect of the present invention.

  According to the present invention, a recorded program can be searched for a part of one program as a unit.

  Before describing the present invention in detail, an outline will be described. An embodiment of the present invention is a playback device that records a digital television broadcast program after receiving the digital television broadcast, and plays back the recorded program based on an instruction from the user. About. Since the playback device has a hard disk, the program recording time is also long. The reproduction apparatus according to the present embodiment has the following configuration so that a predetermined portion in a predetermined program can be easily searched and reproduced. In digital television broadcasting, in addition to video and audio broadcasting (hereinafter referred to as “video broadcasting”), data broadcasting is also broadcast. For data broadcasting, independent data broadcasting that is not directly related to programs such as weather forecasts and traffic information, and for sports programs, program-linked data broadcasting linked to programs such as information on participating players (hereinafter referred to as program-linked data broadcasting) Is simply called "data broadcasting"). In other words, data broadcasting generally includes information related to video / audio broadcast simultaneously.

  In data broadcasting, a plurality of pieces of information are continuously arranged with information to be reproduced at one time as one unit. Here, the information to be reproduced at a time may be information that is simultaneously displayed on the screen of the display device. When recording a program, the playback apparatus according to the present embodiment associates each of the plurality of information included in the data broadcast with each of the plurality of frames included in the video broadcast. Here, the frame means each of a plurality of images constituting a moving image, and may be called a picture. The playback device plays back a data broadcast when playing back a program. The user selects information corresponding to a portion desired to be reproduced while browsing the displayed data broadcast. The playback device specifies a frame corresponding to the selected information. Furthermore, the playback device displays video on the screen of the display device from the identified frame.

  FIG. 1 shows the configuration of a playback apparatus 10 according to an embodiment of the present invention. The playback device 10 connects a display device 12 and an audio output device 14. The playback apparatus 10 includes an antenna 20, a receiving unit 22, a descrambler 24, a recording control unit 26, a storage unit 28, a DEMUX 30, a central control unit 32, an operation unit 34, a reception unit 36, an MPEG decoder 38, and a data broadcast drawing control unit 40. A screen control unit 42, an AAC decoder 44, and an audio control unit 46.

  The receiving unit 22 receives a broadcast program via the antenna 20. Here, as described above, since the broadcast program is a digital television broadcast program, it is assumed that a video broadcast and a data broadcast are included. The data broadcast of the program received by the receiving unit 22 includes a plurality of information. One piece of information is assumed to be character information displayed on the screen at the same time. Hereinafter, one of the plurality of information is referred to as “data broadcast description data”. Since the data broadcast included in the program is linked to the video broadcast, the data broadcast description data is linked to the frame included in the video broadcast. Since there are 10 or more frames per second, one data broadcast description data may correspond to a plurality of frames. A plurality of data broadcast description data having the same contents may exist. Video broadcasts of programs received by the receiving unit 22 are encoded by MPEG (Motion Picture Experts Group).

  Therefore, a frame that is encoded without using another frame (hereinafter referred to as “I frame”) and a frame that is encoded while using another frame (hereinafter referred to as “P frame”) are included. ing. Note that audio is also included in the video broadcast, but the audio is considered to be synchronized with the video and description thereof is omitted. It is assumed that the voice is encoded by AAC (Advanced Audio Coding). The receiving unit 22 includes a tuner and a demodulator (not shown), and demodulates the received broadcast wave and converts it into TS data. The TS (Transport Stream) data in this state is scrambled. The descrambler 24 releases the scramble of the TS data.

  The recording control unit 26 records the TS data descrambled by the descrambler 24. That is, the recording control unit 26 records the video broadcast and the data broadcast in the storage unit 28. In video broadcast recording, TS data received from the descrambler 24 is processed by the recording control unit 26 and stored in a storage unit 28 such as a hard disk. In addition, the recording control unit 26 does not save the copy-prohibited TS data in the storage unit 28, but saves the copy-prohibited TS data in the storage unit 28 as copy-prohibited TS data. At that time, the recording control unit 26 creates time information necessary for reproduction and stores it in the storage unit 28. That is, when the recording control unit 26 executes recording, information including the elapsed time of the program corresponding to the I frame and the P frame (hereinafter referred to as “recording index file”) is generated.

  The recording index file will be specifically described. The recording index file includes the elapsed time from the start of recording, the storage positions of P frames and I frames in the recording data file, and the storage positions of I frames necessary for generating video data. The elapsed time is in seconds, and the storage position is defined as an offset from the beginning of the file. FIG. 2 shows the structure of data generated by the recording control unit 26. As shown in the figure, an elapsed time column 60, a P picture address column 62, and an I picture address column 64 are included. The elapsed time column 60 indicates the elapsed time from the start of recording, and the P picture address column 62 indicates the offset from the beginning of the file, that is, the position of the P frame or I frame. An I picture address field 64 indicates the position of the I frame. Furthermore, after the line feed, it becomes the next data. Assuming MPEG2, as described above, the I frame can be reproduced alone. However, since the P frame requires the previous frame for reproduction, the I frame is decoded and the subsequent frames are decoded based on this. P frames are decoded.

  Returning to FIG. The DEMUX 30 processes the TS data received from the descrambler 24 when viewing the video broadcast. The DEMUX 30 analyzes the content of the encoded data from the header information in the descrambled TS data, and divides the multiplexed information into video data, audio data, data broadcast description data, and additional data. The additional data includes information other than video and audio, such as subtitles. Audio data and video data are compressed in a format standardized by broadcasting. The data broadcast description data includes a document described in BML (Broadcast Markup Language) and image data such as JPEG data which is a component of the document. Note that video data and audio data are used for the video broadcast described above, and the data broadcast description data is used for the data broadcast described above.

  When playing back a recorded video broadcast, the recording control unit 26 reads TS data from the storage unit 28. In addition, the recording control unit 26 outputs TS data to the DEMUX 30. Normally, the DEMUX 30 outputs video and audio data and data broadcast description data to the central control unit 32. In this embodiment, only the data broadcast is reproduced first, so the DEMUX 30 outputs only the data broadcast description data stored in the DSM-CC section to the central control unit 32. Here, the data broadcast description data is transmitted by a data carousel transmission method. In this method, the same data, that is, the same character information is transmitted while being repeated for a certain period. Therefore, the receiving side can acquire necessary character information at an arbitrary timing. A set of a plurality of data repeatedly transmitted is called a carousel, and each data is called a module.

  The data broadcast drawing control unit 40 causes the display device 12 to display a data broadcast linked to the video broadcast among the programs recorded in the storage unit 28. That is, the data broadcast drawing control unit 40 stores the carousel data broadcast description data in a memory (not shown) and then displays the data broadcast display data on the display device 12. In the carousel method, since the same data is repeatedly sent for a certain period, the same data is repeatedly stored in the recorded data. Therefore, the data broadcast drawing control unit 40 receives the same data multiple times. As long as the same data is received from the DEMUX 30, the central control unit 32 requests the recording control unit 26 to read the data recorded in the storage unit 28 and then pass it to the DEMUX 30. Whether or not the data output from the DEMUX 30 is the same is detected by the data broadcast drawing control unit 40 by comparing the received data with data stored in a memory (not shown).

  That is, the data broadcast drawing control unit 40 displays the recorded data broadcast on the display device 12 as follows. The data broadcast drawing control unit 40 acquires a plurality of data broadcast description data from the storage unit 28 in the order recorded in the storage unit 28. When the acquired data broadcast description data is different from the previously acquired data broadcast description data, an update of the data broadcast description data is detected. Furthermore, if the data broadcast description data has been updated and the display of the content of the data broadcast description data acquired last time on the display device 12 has elapsed for a predetermined period, the data broadcast drawing control unit 40 The updated data broadcast description data is displayed on the display device 12. The processing of the data broadcast drawing control unit 40 will be described in more detail as follows.

  When the data broadcast description data from the DEMUX 30 does not match the data broadcast description data currently held in the memory, the data broadcast drawing control unit 40 holds the acquired data broadcast description data in the memory, and Update the display. The area to be held may be an area in which the previously acquired data broadcast description data is held. When the display is updated, the user cannot view the displayed content unless a sufficient time has elapsed since the last display update. If not, it waits until a certain time has passed. The predetermined time is a predetermined time, and a value stored in the memory may be used, or may be determined from the information amount of the data broadcast screen currently displayed on the display device 12. The amount of information depends on the number of characters and the number of images. After updating the display on the display device 12, the data broadcast drawing control unit 40 requests the recording control unit 26 to read the data broadcast description data recorded in the storage unit 28 and output it to the DEMUX 30.

  As long as the data broadcast description data output from the DEMUX 30 is the same as the data broadcast description data held in the memory, the data broadcast drawing control unit 40 instructs the recording control unit 26 to record the data broadcast description recorded in the storage unit 28. Requests to read data and output to DEMUX 30. In addition, about the update of a display, the data broadcast drawing control part 40 may complete | finish standby processing by the pressing of the operation button by a user, even if fixed time does not pass. Here, the operation button corresponds to the operation unit 34, and pressing of the operation button is detected by the reception unit 36. In addition, when the period during which the content of the data broadcast description data is actually displayed on the display device 12 is shorter than the predetermined waiting time, only the time that is actually displayed is displayed, and the next process You may go on.

  The operation for acquiring the data broadcast description data from the storage unit 28 will be further described in detail as follows. The data broadcast drawing control unit 40 displays the data broadcast on the display device 12 in the order of the broadcast time. When the data broadcast description data is processed in the DEMUX 30, if it is the first data of the carousel, the offset from the head of the file is acquired. The elapsed time from the start of recording is acquired using the offset value from the beginning of the file and the recording index file. Since the offset value of the P file or I file is recorded in the recording index file, the one closest to the offset value of the data broadcast description data may be selected. The DEMUX 30 outputs the elapsed time to the central control unit 32 together with the data broadcast description data. The central control unit 32 stores the data broadcast description data and the elapsed time in the memory. The elapsed time once received is not updated until the data broadcast description data stored in the memory of the data broadcast drawing control unit 40 and the data broadcast description data received from the DEMUX 30 are in a different state.

  As described above, the data broadcast drawing control unit 40 displays the data information description data on the display device 12. When the display is performed, the screen control unit 42 controls the display device 12. Further, the screen control unit 42 also performs control on the display device 12 when displaying the video broadcast on the display device 12.

  The receiving unit 36 receives an instruction to select the data information description data displayed on the display device 12. Since the display device 12 performs display while updating a plurality of data information description data, the instruction can be said to be an instruction to select any of the plurality of data information description data. The instruction is given by the user via the operation unit 34. The operation unit 34 includes a playback button or the like.

  The central control unit 32 reproduces the video broadcast recorded in the storage unit 28 from the elapsed time of the program corresponding to the selection instruction received in the central control unit 32. The central control unit 32 acquires the elapsed time currently stored in the memory, and requests the DEMUX 30 to output stored data from the elapsed time. The DEMUX 30 acquires the I-frame storage position of the target video broadcast from the elapsed time and the recording index file, analyzes the TS data from this position, decomposes it into video data, audio data, data broadcast description data, etc. The data is output to the central control unit 32. The central control unit 32 causes the MPEG decoder 38 to decode these data, but does not display them on the display device 12.

  That is, when analysis is performed up to the storage position of the P frame or the I frame of the target video broadcast obtained from the recording index file, the display is instructed to the MPEG decoder 38. As a result, the MPEG decoder 38 and the screen control unit 42 start displaying on the display device 12. In addition, the data broadcast drawing control part 40 shall reproduce | regenerate a data broadcast so that it may synchronize with a video broadcast. As in the case of reproducing only the data broadcast described above, the data broadcast rendering control unit 40 compares the data broadcast description data stored in the currently displayed memory with the data broadcast description data from the DEMUX 30, and If so, let it play as it is. If they do not match, the fact that the scene has changed is displayed, and the data broadcast drawing control unit 40 allows the user to select whether to view or cancel the viewing.

  Such an operation may be described as follows. The central control unit 32 specifies the I frame based on the elapsed time of the program corresponding to the selection instruction received in the reception unit 36 while referring to the recording index file. Further, the central control unit 32 causes the MPEG decoder 38 to start reproduction from the identified I frame. The reproduction here is the same as the decoding. The central control unit 32 displays the reproduced video broadcast on the display device 12 from the elapsed time of the program corresponding to the selection instruction received in the reception unit 36.

  The MPEG decoder 38 decodes the video broadcast, that is, the video data while following the instruction of the central control unit 32. The MPEG decoder 38 outputs the decoded video broadcast to the screen control unit 42. Depending on the elapsed time of the program, it may not be output as described above. The AAC decoder 44 decodes the audio data. Here, the audio data is encoded by AAC. The AAC decoder 44 outputs the decoded audio data to the audio control unit 46. The sound control unit 46 controls the sound output device 14 so as to output sound. Details are omitted.

  This configuration can be realized in terms of hardware by a CPU, memory, or other LSI of any computer, and in terms of software, it is realized by a program having a playback function loaded in the memory. Describes functional blocks realized by collaboration. Accordingly, those skilled in the art will understand that these functional blocks can be realized in various forms by hardware only, software only, or a combination thereof.

  FIG. 3 is a flowchart showing a data broadcast display procedure in the playback apparatus 10. The data broadcast drawing control unit 40 acquires data broadcast data, that is, data broadcast description data (S10). If there is acquired data broadcast description data (Y in S12) and there is data broadcast description data already stored in the memory (Y in S14), the acquired data broadcast description data must match the data stored in the memory. If (N in S16), the operation is as follows. That is, if 15 seconds have passed since the last update time (Y in S18), the data broadcast drawing control unit 40 stores the acquired data broadcast description data in the memory (S20). On the other hand, if 15 seconds have not elapsed since the latest update time (N in S18), the data broadcast drawing control unit 40 waits until it elapses. The operations in steps 18 and 20 are also executed when there is no data broadcast description data already stored in the memory (N in S14). If the acquired data broadcast description data matches the data stored in the memory (Y in S16), the process returns to step 10. The data broadcast drawing control unit 40 displays the data broadcast on the display device 12 (S22) and updates the latest update time (S24). Thereafter, the process returns to Step 10. If there is no acquired data broadcast description data (N in S12), the process is terminated.

  FIG. 4 is a flowchart showing a data broadcast reproduction procedure in the reproduction apparatus 10. If there is TS data to be reproduced (Y in S30), the DEMUX 30 analyzes the TS data (S32). If the data broadcasting description data is included (Y in S34) and the data is the first data in the carousel (Y in S36), the DEMUX 30 acquires the elapsed time from the start of recording (S38), and the elapsed from the start of recording The time is notified to the central control unit 32 (S40). Further, the DEMUX 30 outputs the data to the central control unit (S42). On the other hand, if it is not data at the beginning of the carousel (N in S36), the DEMUX 30 outputs the data to the central control unit (S42). Thereafter, the process returns to step 30. Even if the data broadcast description data is not included (N in S34), the process returns to step 30. If there is no TS data to be reproduced (N in S30), the process is terminated.

  FIG. 5 shows the relationship between video broadcast and data broadcast in a program received by the playback apparatus 10. Here, it is assumed that the program in the video broadcast is a news program. Generally, a news program is configured to report a plurality of news. As shown in the figure, each of a plurality of news is indicated as “news A”, “news B”, “news C”, “news D”. The broadcast times of “News A”, “News B”, “News C”, and “News D” are “3 minutes”, “2 minutes”, “3 minutes”, and “5 minutes”, respectively. . Data broadcasting is broadcast in synchronization with video broadcasting. Therefore, “News A character information” corresponding to “News A”, “News B character information” corresponding to “News B”, “News C character information” corresponding to “News C”, “News D” "Text information of news D" corresponding to "" is configured as a data broadcast. With the above configuration, the broadcast times of “News A text information”, “News B text information”, “News C text information”, and “News D text information” are also “3 minutes” and “2 minutes”, respectively. ”,“ 3 minutes ”, and“ 5 minutes ”.

  FIG. 6 shows the update of the content of the data broadcast reproduced by the reproducing apparatus 10. The display contents when the data broadcast drawing control unit 40 displays the data broadcast on the display device 12 are shown. As shown in the figure, the broadcast times of “News A text information”, “News B text information”, “News C text information”, and “News D text information” are each set to “15 seconds”. It is prescribed.

  The operation of the playback apparatus 10 having the above configuration will be described. The receiving unit 22 receives a broadcast program. The recording control unit 26 records the received program in the storage unit 28. The recording control unit 26 generates a recording index file when executing recording. When receiving an instruction to play a recorded program from the user, the data broadcast drawing control unit 40, through the recording control unit 26, the DEMUX 30, etc., reads the data broadcast description of the programs recorded in the storage unit 28. The data is displayed on the display device 12. At that time, the data broadcast drawing control unit 40 performs control so that the content of one data broadcast description data is displayed for at least 15 seconds while confirming the content of the data broadcast description data.

  The user views the data broadcast description data displayed on the display device 12. When data broadcast description data that is likely to correspond to a desired video broadcast scene is displayed, the user inputs a selection instruction via the operation unit 34. Based on the input instruction, the central control unit 32 acquires the elapsed time currently stored in the memory. The DEMUX 30 acquires the storage position of the I frame from the elapsed time and the recording index file, and extracts the I frame and the like from the storage unit 28. The central control unit 32 causes the MPEG decoder 38 to decode the extracted I frame and the like. Further, the central control unit 32 causes the display device 12 to display the decoded video broadcast from the elapsed time corresponding to the instruction.

  Next, a modification of the above embodiment will be described. The modification relates to reproduction of recorded data broadcast. In the embodiments so far, the data broadcast drawing control unit 40 performs control so that the display of the same data broadcast description data is continued for a predetermined period when the data broadcast is displayed on the display device 12. In the modification, the data broadcast drawing control unit 40 displays a plurality of data broadcast description data on one screen. That is, the data broadcast drawing control unit 40 displays the data information description data as thumbnails. The configuration of the reproduction apparatus 10 according to the modification is the same type as that in FIG. When the data broadcast description data output from the DEMUX 30 does not match the data broadcast description data currently held in the memory, the data broadcast drawing control unit 40 holds the acquired data broadcast description data in the memory. When the display is updated, the data broadcast drawing control unit 40 checks whether there is a remaining area for displaying the data broadcast description data.

  When the display device 12 reduces the data broadcast screen to 1/3 horizontal and 1/3 vertical, nine data broadcast description data can be displayed. Therefore, when nine data broadcast description data have already been displayed, the data broadcast drawing control unit 40 determines that there is no area to be displayed. If there is a user operation via the operation unit 34 and the reception unit 36, the data broadcast drawing control unit 40 deletes the data broadcast description data displayed in one area and then newly acquires the data broadcast description. Display data. The data broadcast drawing control unit 40 further requests the DEMUX 30 to acquire the next data broadcast description data. In addition, if the number of data broadcast description data displayed on the screen of the display device 12 is nine or less, the data broadcast drawing control unit 40 newly displays the data broadcast description data in an area where display is not performed. The data broadcast drawing control unit 40 requests the DEMUX 30 to acquire the next data broadcast description data. The data broadcast drawing control unit 40 may perform reduction display of the data broadcast description data. However, when the data broadcast drawing control unit 40 does not have such a function, the output drawing data is displayed by a general reduction algorithm. What is necessary is just to reduce and display.

  Further, the data broadcast drawing control unit 40 or the central control unit 32 stores the elapsed time from the recording start time for each of the data broadcast description data displayed on the screen of the display device 12. When the receiving unit 36 receives a selection instruction, the data broadcast drawing control unit 40 or the central control unit 32 outputs to the DEMUX 30 the elapsed time from the recording start time corresponding to the selected data broadcast description data. The configuration of such a modification may be expressed as follows. The data broadcast drawing control unit 40 acquires a plurality of data broadcast description data from the storage unit 28 in the order recorded in the storage unit 28. The data broadcast drawing control unit 40 detects the update of the data broadcast description data when the acquired data broadcast description data is different from the previously acquired data broadcast description data, and a part of the display area of the display device 12 While displaying the updated data broadcast description data in the area, the contents of the previously acquired data broadcast description data are displayed in another area.

  FIG. 7 is a flowchart showing another display procedure of data broadcasting in the playback apparatus 10. The data broadcast drawing control unit 40 acquires data broadcast data, that is, data broadcast description data (S50). If there is acquired data broadcast description data (Y in S52) and there is data broadcast description data already stored in the memory (Y in S54), the acquired data broadcast description data must match the data stored in the memory. (N in S56), the operation is as follows. The same applies when there is no data broadcast description data already stored in the memory (N in S54).

  If the display area does not remain (N in S58), the receiving unit 36 waits for a user instruction (S60). If there is no user instruction (N in S62), the process returns to step 60. If there is a user instruction (Y in S62), the data broadcast drawing control unit 40 stores the acquired data broadcast description data in the memory (S64). On the other hand, if the display area remains (Y in S58), the data broadcast drawing control unit 40 stores the acquired data broadcast description data in the memory (S64). The data broadcast drawing control unit 40 displays the data broadcast on the display device 12 (S66). Thereafter, the process returns to step 50. If there is no acquired data broadcast description data (N in S52), the process is terminated.

  FIG. 8 shows display contents on the display device 12. As illustrated, the display area of the display device 12 is divided into nine areas. Also, “News A text information” to “News I text information” are displayed in order. With the above configuration, a thumbnail display is formed.

  According to the embodiment of the present invention, when a digital television broadcast including a data broadcast linked to a program is reproduced, a viewer can search for a desired scene using the data broadcast. In addition, since the data broadcast is reproduced for each screen for a certain time, a desired scene can be specified in a short time. Further, since the video broadcast is not fast-forwarded, the possibility of overlooking a desired scene can be reduced. Further, since only the data broadcast is displayed in order, the display of the content of the data broadcast can be speeded up and one content of the data broadcast is displayed for a predetermined period, so that the display of the content of the data broadcast can be executed reliably. In addition, since a plurality of contents of the data broadcast are displayed so as to be listed, the contents of the data broadcast can be reliably displayed. In addition, since the playback is executed from the I frame, the video broadcast can be reliably played back. Further, since the display is started from the elapsed time of the program corresponding to the instruction, the display corresponding to the instruction can be executed.

  In the above, this invention was demonstrated based on the Example. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to the combination of each component and each processing process, and such modifications are also within the scope of the present invention. .

  In the embodiment of the present invention, the receiving unit 22 receives a digital television broadcast program. However, the present invention is not limited to this. For example, the receiving unit 22 may receive a radio broadcast program. According to this modification, the communication device 100 can be applied also when receiving a radio broadcast. That is, it is only necessary to have a data broadcast linked to the program being broadcast.

It is a figure which shows the structure of the reproducing | regenerating apparatus based on the Example of this invention. It is a figure which shows the structure of the data produced | generated in the video recording control part of FIG. 3 is a flowchart showing a data broadcast display procedure in the playback apparatus of FIG. 1. 3 is a flowchart showing a data broadcast reproduction procedure in the reproduction apparatus of FIG. 1. It is a figure which shows the relationship between the video broadcast and data broadcast in the program received in the reproducing | regenerating apparatus of FIG. It is a figure which shows the update of the content of the data broadcast reproduced | regenerated in the reproducing | regenerating apparatus of FIG. 6 is a flowchart showing another display procedure of data broadcasting in the playback apparatus of FIG. 1. It is a figure which shows the display content in the display apparatus of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Playback apparatus, 12 Display apparatus, 14 Audio output apparatus, 20 Antenna, 22 Receiving part, 24 Descrambler, 26 Recording control part, 28 Storage part, 30 DEMUX, 32 Central control part, 34 Operation part, 36 Reception part, 38 MPEG decoder, 40 data broadcast rendering control unit, 42 screen control unit, 44 AAC decoder, 46 audio control unit.

Claims (6)

A receiving unit for receiving a broadcast program;
A recording unit for recording the program received in the receiving unit;
An information reproducing unit for displaying information data linked to video data on a display device among the programs recorded in the recording unit;
A receiving unit that receives an instruction to select information data displayed by the information reproducing unit;
A video playback unit for playing back video data of the program recorded in the recording unit from the elapsed time of the program corresponding to the selection instruction received in the reception unit;
The information data of the program received in the receiving unit includes a plurality of information so that different information is included while repeating the same information ,
The information reproducing unit
An acquisition unit for acquiring a plurality of pieces of information from the recording unit in the order recorded in the recording unit;
A detection unit that detects an update of information when the information acquired in the acquisition unit is different from the previously acquired information;
When the update of the information is detected by the detection unit, even if the broadcast time of the different information is different in the program received by the reception unit, the display time when reproducing the different information is the same. An instruction unit for displaying the updated information on the display device,
A playback apparatus comprising: A receiving unit for receiving a broadcast program;
A recording unit for recording the program received in the receiving unit;
An information reproducing unit for displaying information data linked to video data on a display device among the programs recorded in the recording unit;
A receiving unit that receives an instruction to select information data displayed by the information reproducing unit;
A video playback unit for playing back video data of the program recorded in the recording unit from the elapsed time of the program corresponding to the selection instruction received in the reception unit;
The information data of the program received in the receiving unit includes a plurality of information,
The information reproducing unit
An acquisition unit for acquiring a plurality of pieces of information from the recording unit in the order recorded in the recording unit;
A detection unit that detects an update of information when the information acquired in the acquisition unit is different from the previously acquired information;
An instruction to display the content of the previously acquired information in another area while displaying the updated information in a part of the display area of the display device when the detection unit detects an update of the information And
A playback apparatus comprising: The video data of the program received by the receiving unit includes a frame that is encoded without using other frames and a frame that is encoded while using other frames,
The recording unit generates information including an elapsed time of a program corresponding to a frame that is encoded without using other frames when performing recording,
The reception unit receives an instruction to select one of a plurality of pieces of information included in the information data as an instruction to select,
The video reproduction unit encodes without using other frames based on the elapsed time of the program corresponding to the selection instruction received in the reception unit while referring to the information generated by the recording unit 3. The playback apparatus according to claim 1, further comprising means for specifying a frame to be played and means for executing playback from the specified frame. In the video playback unit, if the elapsed time of the program corresponding to the selection instruction received in the reception unit corresponds to a frame encoded using another frame, the selection received in the reception unit 4. The reproducing apparatus according to claim 3 , wherein the reproduced video data is displayed on the display device from the elapsed time of the program corresponding to the instruction.   Receiving a broadcast program; and
  Recording the received program;
  A step of causing the display device to display information data linked to the video data among the recorded programs;
  Receiving a selection instruction for the displayed information data;
  Replaying video data of the recorded program from the elapsed time of the program corresponding to the received selection instruction,
  The information data in the program received in the receiving step includes a plurality of information so that different information is included while repeating the same information,
  The step of displaying the information data on a display device includes:
  Acquiring a plurality of information in the order recorded,
  A step of detecting an update of information when the acquired information is different from the previously acquired information;
  When an update of information is detected, the program received in the receiving step has the same display time when reproducing each different information even if the broadcasting time of each different information is different. Displaying updated information on a display device;
  A playback method comprising:   Receiving a broadcast program; and
  Recording the received program;
  A step of causing the display device to display information data linked to the video data among the recorded programs;
  Receiving a selection instruction for the displayed information data;
  Replaying video data of the recorded program from the elapsed time of the program corresponding to the received selection instruction,
  The information data of the program received in the receiving step includes a plurality of information,
  The step of displaying the information data on a display device includes:
  Acquiring a plurality of information in the order recorded,
  A step of detecting an update of information when the acquired information is different from the previously acquired information;
  When updating of information is detected, displaying the updated information in a part of the display area of the display device while displaying the content of the previously acquired information in another area; and
  A playback method comprising:

Images