JP2019186732A - Recorder and playback method of recorded information - Google Patents

Abstract

To provide a recorder capable of synchronizing video information and subtitle information when reproducing BS recorded information based on time information included in the recorded information.SOLUTION: The recorder for reproducing the recorded information of a BS broadcast, synchronizes video information and subtitle information included in recorded information to reproduce when reproducing recorded information using time information based on NTP included in recorded information. The recorder also, synchronizes the video information and subtitle information included in the BS broadcast being received and output the same for viewing using the time information based on the system clock of the recorder when viewing the BS broadcast being received.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to a recorder that reproduces BS broadcast recording information and a recording information reproduction method.

  Patent Document 1 discloses an apparatus that generates reference clocks by transmitting reference clock information from a transmission side and receiving reference clock information at a reception side in a hybrid distribution system using an MMT (MPEG Media Transport) system. In this apparatus, the MMT packet is transmitted using an advanced BS transmission system defined by the ARIB standard.

JP2015-95898A

  In the above-described advanced BS transmission system, it may be difficult to synchronize the video information and the caption information when reproducing BS recording information.

  The present disclosure provides a recorder or the like that can synchronize video information and caption information when reproducing BS recording information.

  The recorder in the present disclosure is a recorder that reproduces BS broadcast recording information. When the recording information is reproduced, the recording is performed using time information based on NTP (Network Time Protocol) included in the recording information. An information processing unit for reproducing video information and subtitle information included in the information in synchronization is provided.

  The recording information playback method according to the present disclosure is a BS broadcast recording information playback method, which uses time information based on NTP (Network Time Protocol) included in the recording information, and includes video information included in the recording information. And subtitle information is synchronized and played.

  Note that these comprehensive or specific modes may be realized by a recording medium such as a system, an apparatus, a method, an integrated circuit, a computer program, or a computer-readable CD-ROM. These comprehensive or specific aspects may be realized by any combination of a system, an apparatus, a method, an integrated circuit, a computer program, and a recording medium.

  When BS recording information is reproduced, video information and subtitle information can be synchronized.

The figure which shows the reproduction | regeneration processing of BS recording information in the recorder of a comparative example The figure which shows the reproduction | regeneration processing of BS recording information in the recorder of embodiment Schematic diagram of a BS broadcast receiving system including a recorder according to an embodiment Schematic configuration diagram of the recorder of the embodiment The block diagram which shows the function structure of the recorder of embodiment The flowchart which shows the reproduction method of BS recording information in an embodiment The flowchart which shows the reproduction method of BS recording information in the modification of embodiment

(Background to this disclosure)
First, the process leading to the present disclosure will be described. In conventional BS (Broadcasting Satellite) broadcasting, communication is performed by storing video information, audio information, caption information, and the like in the payload of a PES (Packetized Elementary Stream) packet. Note that “caption information” in the present disclosure means information having at least one of caption and superimpose. In BS broadcasting, since communication is performed using MPEG2-TS packets, communication is performed by dividing a PES packet so as to be included in the TS packet.

  The PES packet is divided into a header and a payload, actual data is stored in the payload, and control data is stored in the header. Each of DTS (Decoding Time Stamp) indicating the timing for processing the actual data and PTS (Presentation Time Stamp) indicating the timing for displaying the actual data is stored in the header. In the recorder that receives the BS broadcast, the display operation is controlled based on a PCR (Program Clock Reference) multiplexed and transmitted from the transmission side, which is a reference clock. For example, the recorder displays the actual data when the PCR reaches the PTS time.

  The recorder forms video by outputting video information and audio information one after another. The recorder displays subtitles by appropriately outputting subtitle information. In conventional BS broadcasting, video information, audio information, and caption information are communicated with the same packet structure, and are displayed and controlled based on PCR on the same time axis. Therefore, in conventional BS broadcasting, when reproducing BS recording information, video information, audio information, and caption information can be synchronized by referring to the PCR without referring to the current time.

  On the other hand, in advanced BS broadcasting, video information, audio information, and caption information are communicated in a container called a TLV / MMT packet. According to the TLV (Type Length Value) method, data can be transmitted not only by broadcast waves but also by a network. Thereby, for example, the difference data for each region can be transmitted over the network, and a service specialized for each region can be performed.

  In advanced BS broadcasting, time information called NTP (Network Time Protocol) is adopted as a mechanism for realizing synchronization between data transmitted on the broadcast wave and data transmitted on the network. NTP is often used as system clock reference time information even in systems such as LINUX. In a system that receives NTP by some method, the system clock of the device is synchronized (set / corrected) using NTP. There may be. The system clock is often provided by a kernel or the like so that it can be easily referred to from various software (such as application programs) running on the device.

  Thus, for example, in a recorder that records advanced BS broadcasting, it is sufficiently conceivable to synchronize the system clock of the recorder with the current time using NTP. Normally, since NTP is aligned with the current time, when viewing and outputting a BS broadcast being received, even if a system clock synchronized with NTP is used, the video information, audio information, and caption information are compatible with the current time. There will be no time lag in viewing output. However, when reproducing BS recording information, the following problems may occur.

  FIG. 1 is a diagram showing a process for reproducing BS recording information in a recorder of a comparative example. On the other hand, FIG. 2 is a diagram illustrating a process of reproducing BS recording information in the recorder of the present disclosure.

  1 and 2, when BS recording information is reproduced, a TLV stream that is BS recording information recorded in a recording unit of each recorder is converted into AV information (audio information and audio information) by a demultiplexer (Demux). Video information) and subtitle information are separated and then output.

  In the comparative example shown in FIG. 1, AV information is decoded with reference to the system clock, and caption information is also captioned with reference to the system clock. However, for example, when the information recorded at time 5:00 is reproduced at time 8:00, the NTP time 5:00 included in the information (recording information) recording the BS broadcast is viewed from the current time 8:00. It will be past time.

  Normally, as described above, the recorder synchronizes the system clock using the NTP included in the broadcast wave currently received by the tuner. This is due to the following reason.

  A recorder may need to record simultaneously while playing. In this case, if the system clock is set with time information based on the NTP of the recording information, the clock does not have an expected value when recording, and the recording does not operate normally.

  Also, when re-encoding a received broadcast and recording it, it is necessary to once decode the received video information and audio information. However, the NTP of the recording information included in the stream being played back at the same time If the system clock is synchronized, the time information based on the system clock becomes past than the time information based on NTP notified from the currently received broadcast wave. There is a possibility that it is not time to decode, and re-encoding processing cannot be performed. This is a situation where the recorder cannot satisfy the system requirements and is not allowed. Therefore, the system clock is generally synchronized with the NTP included in the currently received broadcast wave.

  However, when video information, audio information, or subtitle information is reproduced using this system clock, there arises a problem that information having time information based on past NTP is not displayed as recorded information as shown in FIG.

  On the other hand, in the present disclosure shown in FIG. 2, when BS recording information is reproduced, time information referred to by the reproducing process of the recorder is not a system clock based on NTP included in the currently received broadcast wave, but is recorded. Time information generated from the NTP included in the stream is used. According to this, for example, even when information recorded at time 5:00 is reproduced at time 8:00, the time information referred to at the time of reproduction is time 5:00. This coincides with the NTP time 5:00 included in the caption information. Therefore, video information, audio information, and caption information can be synchronized regardless of the current time.

  Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art.

  In addition, in order for those skilled in the art to provide a thorough understanding of the present disclosure, the accompanying drawings and the following description are provided, and are not intended to limit the subject matter described in the claims.

(Embodiment)
[1. Recorder configuration]
Hereinafter, the configuration of the recorder 10 according to the embodiment will be described with reference to the drawings.

  FIG. 3 is a schematic diagram of a BS broadcast receiving system 1 including the recorder 10 according to the embodiment. FIG. 4 is a schematic configuration diagram of the recorder 10.

  The BS broadcast receiving system 1 includes an antenna 40, a recorder 10, and a display device 50. Each of the antenna 40 and the display device 50 is connected to the recorder 10 via a cable or the like.

  The recorder 10 includes a tuner 11, a recording unit 12, and an information processing unit 15. The recorder 10 receives the BS broadcast via the antenna 40 and the tuner 11. Information included in the received BS broadcast is transmitted from the recorder 10 to the display device 50 having a display screen. At this time, the information processing unit 15 processes information included in the BS broadcast being received and outputs the information to the display device 50 for viewing.

  Information included in the received BS broadcast is stored in the recording unit 12 as BS recording information. When reproducing the stored BS recording information, the information processing unit 15 processes the information included in the BS recording information, and reproduces and outputs the information to the display device 50.

  The recording unit 12 is a recording medium such as a memory, a hard disk, or a DVD. The BS broadcast may be input to the recorder 10 via the antenna 40, or may be input to the recorder 10 by optical communication using an optical fiber or the like.

  Next, the functional configuration of the recorder 10 will be described in detail with reference to FIG. FIG. 5 is a block diagram showing a functional configuration of the recorder 10.

  First, a TLV stream is input from the tuner 11 or the recording unit 12 to the information processing unit 15. The input TLV stream is analyzed by the demultiplexer 16 in the order of TLV container, UDP (User Datagram Protocol) / IP container, and MMT container. During the analysis, each SI (section information), which is control information, is output to the system control unit 20 by the TLV-SI filter and the MMT-SI. TLV-SI stores information for channel selection, and records the correspondence method between broadcast programs and IP addresses. On the other hand, the MMT-SI records video information, audio information, subtitle information, video information and audio information time code (PTS / DTS), and the like that constitute a program.

  The system control unit 20 obtains information from the tuner 11 and the recording unit 12 and information from other parts (not shown) of the recorder 10, and based on the information, the subtitle control unit 21 of the information processing unit 15, Control is performed by outputting control signals to the video control unit 24 and the audio control unit 27. Further, the system control unit 20 analyzes each SI (section information), specifies video information, audio information, and caption information to be recorded, and acquires time codes of the video information, audio information, and caption information. In addition, the system control unit 20 adjusts the system clock of the recorder 10.

  Further, the demultiplexer 16 analyzes the UDP / IP container and outputs time information related to NTP to the clock generation unit 31.

  Further, the demultiplexer 16 analyzes the MMT container to extract video information, audio information, and subtitle information stored in the MMT container, outputs the subtitle information to the subtitle information buffer unit 22, and converts the video information into video. The information is output to the information buffer unit 25, and the audio information is output to the audio information buffer unit 28.

  The system control unit 20 notifies the video control unit 24 and the audio control unit 27 of the time code of each video information and audio information acquired from each SI (section information). In addition, the video control unit 24 monitors data communication of the corresponding video information buffer unit 25. In addition, the audio control unit 27 monitors data communication of the corresponding audio information buffer unit 28.

  The video control unit 24 compares the PTS and DTS corresponding to the video information stored in the video information buffer unit 25 sent from the system control unit 20 and the time information notified from the clock generation unit 31. When the time information becomes the same as the DTS, the video decoder 26 is requested to decode the video information from the video information buffer unit 25, and when the time information becomes the same as the PTS, the video information buffer unit 25 Request to send video information to the video output.

  In addition, the audio control unit 27 compares the PTS of the audio information stored in the audio information buffer unit 28 sent from the system control unit 20 with the time information notified from the clock generation unit 31 to determine the time. At the timing when the information becomes the same as the PTS, the audio decoder 29 is requested to send the audio information from the audio information buffer unit 28 to the audio output.

  On the other hand, the system control unit 20 makes a subtitle display request to the subtitle control unit 21 when the subtitle display function of the recorder 10 is enabled. The case where the subtitle display function is enabled is, for example, a case where the recorder 10 receives a command related to subtitle display during viewing or playback operation by a remote controller (not shown).

  When receiving the subtitle display request, the subtitle control unit 21 outputs the subtitle information from the subtitle information buffer unit 22 in which the subtitle information is stored to the browser 23, and at the same time the time information generated by the clock generation unit 31. The time information is referred to and notified to the browser 23. The browser 23 analyzes the caption information output from the caption information buffer unit 22 and acquires the display start time and display end time of the caption. The browser 23 refers to the time information notified from the caption control unit 21 and starts displaying the caption when the time information reaches the display start time, and ends the caption display when the display end time is reached. The subtitle image generated by the browser 23 is superimposed on the video image output from the video decoder 26 and then output as video.

  As described above, when reproducing the BS recording information, the information processing unit 15 of the recorder 10 refers to the time information generated from the NTP included in the BS recording information, and is included in the BS recording information using this time information. The video information and subtitle information to be played are synchronized. That is, when reproducing the video information and the subtitle information, the information processing unit 15 reproduces the video information based on the time information generated from the NTP included in the BS recording information, and the time information that matches the time information. The subtitle information having "" is displayed in synchronization with the video information. Thereby, synchronous reproduction of video information and subtitle information can be realized.

[2. Recording information playback method]
Next, a method for reproducing recorded information will be described with reference to FIGS. FIG. 6 is a flowchart showing a method of reproducing BS recording information in the embodiment.

  First, when the subtitle display function is enabled (ON), the information processing unit 15 requests the subtitle control unit 21 to start the browser 23 (step S11).

  Next, the information processing unit 15 determines whether the recorder 10 is in the viewing mode or the playback mode (step S12). The viewing mode and the playback mode can be switched by the user operating the recorder 10 with a remote controller, for example. The viewing mode is that the user views the program (content) information currently broadcast, and the playback mode is that the user has already recorded what is recorded in the recording unit.

  When the information processing unit 15 determines that the state of the recorder 10 is the viewing mode, the system control unit 20 notifies the caption control unit 21, the video control unit 24, and the audio control unit 27 that the viewing mode is set ( In step S13), the caption control unit 21, the video control unit 24, and the audio control unit 27 select a mode that refers to the system clock as time information (step S14).

  In the viewing mode, the recorder 10 receives a BS broadcast stream from the tuner 11 to the information processing unit 15, and the system clock is set and adjusted by an NTP included therein. This realizes that the system clock is synchronized with the current time. The system clock is set and adjusted in the system control unit 20 based on the currently received NTP, and is sent from the system control unit 20 to the caption control unit 21, the video control unit 24, and the audio control unit 27.

  Next, the subtitle control unit 21 determines whether or not the subtitle display setting of the recorder 10 is ON or OFF (step S17). If the subtitle display setting is OFF (invalid), the subtitle control unit 21 ends without displaying the subtitle. On the other hand, when the subtitle display setting is ON (valid), it is confirmed whether or not the subtitle information is accumulated in the subtitle information buffer unit 22 (step S18).

  When there is subtitle information in the subtitle information buffer unit 22, the subtitle control unit 21 controls the browser 23 to acquire the subtitle information in the subtitle information buffer unit 22, and time information based on the system clock as time information is sent to the browser 23. Notification is made (step S19). The browser 23 compares the time information acquired from the system clock with the time information of the display start time set in the subtitle information included in the BS broadcast being received, and displays the subtitle information at the timing when both coincide. Control to do.

  The video control unit 24 compares the time information based on the system clock transmitted from the system control unit 20 with the DTS transmitted from the system control unit 20. Then, the video control unit 24 causes the video information buffer unit 25 to output video information corresponding to this DTS to the video decoder 26. The video control unit 24 controls the video decoder 26 to decode and output this video information.

  Thus, in the viewing mode, the information processing unit 15 uses the time information based on the system clock synchronized with the currently received NTP to synchronize the video information and the caption information included in the currently received BS broadcast. Output is realized. Specifically, the subtitle control unit 21 selects a mode for referring to the system clock in step S14, and the time information obtained from the system clock by the browser 23 and the subtitle information input from the subtitle information buffer unit 22 are set. When the display start times are equal, subtitles are output to the video output, and are displayed superimposed on the video image decoded from the DTS video information synchronized with the time information obtained from the system clock (step S20). .

  In addition, the browser 23 stops the caption display when the time information acquired from the system clock reaches the caption display end time, thereby ending the caption superimposition on the video output (step S21). Note that the display start time and the display end time are described in the caption information as div elements of the ARIB standard STD-B62.

  Next, the subtitle control unit 21 returns the processing to step S <b> 17 in order to perform display processing of the next subtitle information. On the other hand, if there is no caption information in the caption information buffer unit 22 in step S18, the process returns to step S17, and steps S17 and step until the caption information setting is changed or the caption information is accumulated in the caption information buffer unit 22. The loop process of S18 is repeated.

  If the recorder 10 is already in the viewing state and the user changes the subtitle display setting from OFF (invalid) to ON (valid), it may start from step S11 of the flow of FIG. 6 or start from step S12. Also good. The operation varies depending on whether the browser 23 is always activated in the viewing state.

  Next, the operation when the recorder 10 is in the playback mode will be described. In the playback mode, the recorder 10 receives the BS broadcast stream recorded in the recording unit 12 from the recording unit 12 to the information processing unit 15, and the clock generation unit 31 receives a clock from the NTP included in the BS broadcast stream. Generate time information by referring to this clock. When the information processing unit 15 determines that the recorder 10 is in the playback mode, the information processing unit 15 notifies the subtitle control unit 21 that it is in the playback mode (step S15), and the subtitle control unit 21 performs BS recording information in the clock generation unit 31. A mode for referring to a clock generated from the NTP included in the time information as time information is selected (step S16).

  In the processing after step S17, the difference between the viewing mode and the playback mode is that the time information as the clock notified to the browser 23 in step S19 changes to the time information acquired from the clock generation unit 31 instead of the system clock. Only. Other than that, the viewing mode and the playback mode are the same operation. That is, Steps S17 and S18 in the playback mode are the same as the operations in the viewing mode except that the time information to be referenced is different.

  In step S19, the subtitle information of the BS recording information accumulated in the subtitle information buffer unit 22 and the mode for notifying the time information from the clock generation unit 31 are notified (step S19). In step S20 and step S21, the display start time / display end time of the caption information is compared with the time information acquired from the clock generation unit 31, the display of the caption is started / stopped, and the video information included in the recording information In addition, reproduction is realized by synchronizing subtitle information. As described above, in the present embodiment, in the viewing mode for viewing and outputting the BS broadcast being received by the tuner 11, the system clock of the recorder 10 is referred to and the time information based on the system clock is used for reception. The video information and caption information included in the BS broadcast are viewed and output in synchronization.

  Further, in the playback mode for reproducing the BS recording information recorded in the recording unit 12, video information and subtitle information included in the BS recording information are synchronized using time information based on NTP included in the BS recording information. Let it play.

  Thereby, synchronized playback of video information and subtitle information can be realized in each of the viewing mode and the playback mode.

  In the playback mode, fast-forward playback may be performed while displaying subtitle information, such as speech speed playback (fast forward with sound) as well as normal playback speed. In the case of fast-forward playback, it is necessary to make the subtitle display time shorter than the time axis in the real world, but the time information is based on the NTP of the video information of the recorded TLV stream as in this embodiment. By generating, the time information itself is advanced at the same speed as fast-forward playback. In this way, the subtitle display period calculated from the display start time and the display end time included in the subtitle information is changed according to the reproduction speed when reproducing the video information. Thereby, it is possible to control the display of the caption information whose playback interval is adjusted.

  The system control unit 20 operates so as not to receive the NTP in the reproduction mode, or ignore the NTP and adjust the system clock even if it is received.

  In the clock generation unit 31, for example, the system control unit 20 may perform a switching operation so that NTP is notified only in the reproduction mode. Regardless of the viewing mode and the playback mode, the clock generation unit 31 is always notified of NTP and generates clock and time information. The subtitle control unit 21, video control unit 24, and audio control unit 27 are in the playback mode. The system control unit 20 may be controlled to receive time information from the clock generation unit 31 only at the time.

  The clock generation unit 31 generates time information in the viewing mode and time information in the playback mode, and the caption control unit 21, the video control unit 24, and the audio control unit 27 can always obtain time information from the clock generation unit 31. It may be configured to operate while referring to FIG. That is, the time information generated by the clock generator 31 is time information that refers to the system clock adjusted based on the NTP being received by the tuner 11 in the viewing mode, and the video to be played back in the playback mode. The time information generated by the clock generation unit 31 may be remade so as to be time information based on the NTP of the information.

[1-3. Effect]
As described above, the recorder 10 according to the present embodiment is a recorder 10 that reproduces BS broadcast recording information. When the recording information is reproduced, the time information based on the NTP included in the recording information is used. An information processing unit 15 that reproduces video information and subtitle information included in the recording information in synchronization is provided.

  According to this configuration, when BS recording information is reproduced, video information and subtitle information can be synchronized.

  Further, when viewing and outputting the BS broadcast being received, the information processing unit 15 synchronizes video information and subtitle information included in the BS broadcast being received, using time information based on the system clock of the recorder. It may be output for viewing.

  According to this, it is possible to synchronize the video information and the caption information when viewing and outputting the BS broadcast and when reproducing the BS recording information. Further, at the time of viewing, by using time information based on the system clock, it is possible to easily synchronize the video information and the caption information.

  In addition, the information processing unit 15 may change the display period of the caption calculated from the display start time and the display end time included in the caption information according to the playback speed when playing back the video information.

  According to this, even when the BS recording information is reproduced at a speed different from the normal speed, the video information and the caption information can be synchronized.

  In addition, the recorder 10 further includes a browser 23 for displaying subtitle information, and the information processing unit 15 uses the browser 23 to display the subtitle information as video when the video information and the subtitle information are reproduced in synchronization. You may superimpose on information.

  According to this, it is possible to easily synchronize the video information and the caption information by using the browser 23.

  The BS broadcast may have an Internet protocol including UDP.

  According to this, in advanced BS broadcasting, video information and caption information can be synchronized.

  Also, the recording information playback method of the present embodiment is a BS broadcast recording information playback method, which uses video information and subtitle information included in the recording information using time information based on NTP included in the recording information. Synchronize and play.

  According to this, when BS recording information is reproduced, the video information and the caption information can be synchronized.

[1-4. Modified example]
Next, a method for reproducing recorded information in a modification of the embodiment will be described with reference to FIG. In the modification, an example in which a clock generated from the NTP is referred to regardless of any of the viewing mode and the playback mode will be described.

  FIG. 7 is a flowchart showing a method for reproducing BS recording information in a modification of the embodiment.

  First, the information processing unit 15 requests the subtitle control unit 21 to start the browser 23 (step S11).

  Next, the subtitle control unit 21 selects a mode in which the clock generation unit 31 refers to the clock generated from the NTP regardless of whether the recorder 10 is in the viewing mode or the reproduction mode (step S16A).

  Next, the caption control unit 21 determines whether the caption display setting is ON (valid) or invalid (OFF) (step S17). When the subtitle display setting is OFF, the subtitle display process is terminated as it is. On the other hand, when the subtitle display setting is ON, it is confirmed whether there is subtitle information stored in the subtitle information buffer unit 22 (step S18).

  When there is subtitle information in the subtitle information buffer unit 22, the browser 23 is notified of a mode for acquiring time information referring to the subtitle information stored in the subtitle information buffer unit 22 and the clock generated by the clock generation unit 31. (Step S19).

  Incidentally, the browser 23 is described as generating and acquiring the time information by the clock generation unit 31, but the browser 23 acquires the NTP and generates the clock in the browser 23 to acquire the time information. Also good.

  Next, the information processing unit 15 uses the time information based on this clock to synchronize and reproduce the video information and subtitle information included in the recording information, or synchronize the video information and subtitle information included in the BS broadcast. For viewing output. Specifically, the browser 23 displays the subtitle superimposed on the video image when the time information notified in step S19 reaches the display start time (step S20). When the clock reaches the display end time, the subtitle display is ended (step S21).

  Next, the subtitle control unit 21 returns to step S17 to determine whether or not to continue the subtitle display operation. If there is no subtitle information in the subtitle information buffer unit 22 in step S18, the process returns to step S17, and step S17 and step until the subtitle information setting is changed or the subtitle information is accumulated in the subtitle information buffer unit 22. A loop process for repeating S18 is entered.

  As described above, in the modification, when viewing and outputting the BS broadcast being received, the video information and the caption information included in the BS broadcast being received are used by using time information based on the NTP included in the BS broadcast being received. Synchronized viewing output. In addition, when reproducing BS recording information, video information and subtitle information included in BS recording information are synchronized and reproduced using time information based on NTP included in BS recording information.

  According to this, synchronized playback of video information and subtitle information can be realized regardless of either the viewing mode or the playback mode.

(Other embodiments)
As described above, the embodiments have been described as examples of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can also be applied to an embodiment in which changes, replacements, additions, omissions, and the like are appropriately performed. Moreover, it is also possible to combine each component demonstrated in the said embodiment and it can also be set as a new embodiment.

  The present disclosure is applicable to a recorder that receives, records, and reproduces BS broadcasts.

DESCRIPTION OF SYMBOLS 1 BS broadcast receiving system 10 Recorder 11 Tuner 12 Recording part 15 Information processing part 16 Demultiplexer 20 System control part 21 Subtitle control part 22 Subtitle information buffer part 25 Video information buffer part 28 Audio information buffer part 23 Browser 24 Video control part 26 Video Decoder 27 Audio control unit 29 Audio decoder 31 Clock generation unit 40 Antenna 50 Display device

Claims (7)

A recorder for reproducing BS broadcast recording information,
An information processing unit that reproduces the video information and subtitle information included in the recording information in synchronization using time information based on NTP (Network Time Protocol) included in the recording information when the recording information is reproduced. Provide recorder. When viewing and outputting the BS broadcast being received, the information processing unit synchronizes video information and subtitle information included in the BS broadcast being received, using time information based on a system clock included in the recorder. The recorder according to claim 1. The information processing unit, when viewing and outputting the BS broadcast being received, uses the time information based on the NTP included in the BS broadcast being received to use the video information and subtitles included in the BS broadcast being received The recorder according to claim 1, wherein the information is viewed and output in synchronization. The information processing unit changes a subtitle display period calculated from a display start time and a display end time included in the subtitle information according to a reproduction speed when reproducing the video information. The recorder of any one of Claims. And a browser for displaying the caption information.
The information processing unit superimposes the subtitle information on the video information using the browser when the video information and the subtitle information are reproduced in synchronization with each other. Recorder. The recorder according to any one of claims 1 to 5, wherein the BS broadcast has an Internet protocol including UDP (User Datagram Protocol). A method for reproducing BS broadcast recording information,
A method for reproducing recording information, wherein video information and subtitle information included in the recording information are synchronized and reproduced using time information based on NTP (Network Time Protocol) included in the recording information.

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