JP4898177B2 - Broadcast receiving apparatus and broadcast receiving method - Google Patents

Description

  The present invention relates to a broadcast receiving apparatus and a broadcast receiving method for receiving terrestrial digital broadcasting and the like.

  In recent years, various functions have been installed in mobile phone terminals. For example, Patent Document 1 presents a mobile phone terminal having a function of recording call voice. This cellular phone terminal detects when a recording button is pressed and turns on a light receiving element for recording display.

  In recent years, the cellular phone terminals are mainly of a folding type because of a demand for a large display unit for displaying text information and image information and a demand for compact storage when not in use. In addition, as mobile phone terminals become more sophisticated, there are terminals equipped with a sub liquid crystal display in addition to the main liquid crystal display to enable confirmation of the terminal status, time, incoming call information, mail, etc. even when folded. It has become mainstream, and simple operations can be performed with the terminal folded.

  More recently, mobile phone terminals equipped with FM tuners and analog TV tuners have begun to appear, enabling reception of radio and television. In the future, digital terrestrial television broadcasting is scheduled to be 1-segment television broadcasting for portable receivers, and mobile phone terminals may be equipped with digital broadcast reception functions.

  FIG. 7 is a configuration diagram of a conventional mobile phone terminal with a digital terrestrial broadcast receiving function. In addition to a display unit 709, a speaker 710, a microphone 711, a control unit 712, an antenna 713, a transmission / reception unit 714, a non-volatile memory 715, a camera 716, and an operation unit 717, this mobile phone terminal performs digital terrestrial broadcasting. Broadcast receiving antenna 701 for realizing the receiving function, digital terrestrial broadcast compatible tuner 702, OFDM demodulator 703, descrambler 704, MPEG-2 transport stream (TS) separator 705, audio decoder 706, video A decoder unit 707 and a data processing unit 708 are provided.

  When the digital broadcast receiving application is activated, the control unit 712 instructs the tuner unit 702 to select a channel in accordance with an instruction from the application. The tuner unit 702 selects the designated channel, and outputs the received signal to the OFDM demodulation unit 703. The OFDM demodulator 703 extracts the TS from this received signal and outputs it to the descrambler 704. The descrambler 704 performs descrambling processing when the TS is scrambled, and outputs it to the TS separation unit 705. The TS separation unit 705 separates the input TS into program information, service information, a video stream, an audio stream, a data carousel, and the like, and passes the data to corresponding decoders. The video data decoded by the video decoder unit 707 is displayed on the display unit 709, and the audio data decoded by the audio decoder unit 706 is output from the speaker 710. Thereby, the mobile phone terminal with a digital terrestrial broadcast receiving function presents the received program to the user.

In digital terrestrial broadcasting, program information (program name, broadcast time, broadcast start time, etc.) is also included in the broadcast signal and transmitted, and the mobile phone terminal receives this to transmit the electronic program guide ( EPG) can be realized. Furthermore, a recording reservation function using EPG can be realized by increasing the capacity of a memory (including an external memory) mounted on the terminal.
Japanese Patent Laid-Open No. 9-27840

  By the way, in digital terrestrial broadcasting, when the reception condition of a broadcast signal is bad, a data reception error may occur. When a reception error occurs, all the decoding units including the error part cannot be decoded, and a frame drop occurs in the case of video, and a sound skip occurs in the case of audio. Particularly in the case of a video stream, since the decoding unit is larger than that of an audio stream, the influence range of one reception error is large. In particular, in the case of reception with a mobile phone terminal, it is disadvantageous in terms of antenna size and reception sensitivity compared to a fixed receiver, and because the reception location is not fixed, the reception status of broadcast signals is momentarily. Change. Therefore, when the portable receiving terminal records terrestrial digital broadcasting, a situation may occur in which the recorded data can hardly be reproduced even if the recording function is normally activated. For this reason, it is expected that there is a request for the user to confirm whether reception and recording are normally performed.

  In addition, when a mobile phone terminal acquires program information from an EPG and makes a recording reservation using the acquired program information, when a program is extended in a program before the reserved program, When is changed, a program other than the desired program may be recorded. Furthermore, when a recording channel or recording time is set by a user operation, an unintended program may be reserved due to a setting mistake. In order to avoid the above-mentioned failure of recording on a mobile phone terminal with a folding TV recording function, the user opens the terminal at the start of recording, starts the TV application, and confirms the broadcast content being received. A cumbersome operation is required. Further, the above-described recording failure has a problem that not only data desired by the user cannot be recorded, but also the battery of the mobile phone terminal is wasted.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a broadcast receiving apparatus and a broadcast receiving method capable of easily confirming the status of information recording of broadcast contents. There is.

The present invention relates to a receiving means for receiving a broadcast signal, a recording means for recording broadcast content information included in the broadcast signal, and invalid when predetermined data is discontinuous in the recorded broadcast content information. Detection means for detecting a lack when the number of data in the broadcast content information is less than a predetermined number, and the recording based on the detected invalidity or lack in the recorded broadcast content information and notifying means for notifying the situation, a broadcast receiving apparatus having a.

  With this configuration, the user can easily confirm the recording status of the broadcast content information for each predetermined period.

  Further, according to the present invention, the notification means notifies information related to the program corresponding to the information of the broadcast content based on the program related information included in the broadcast signal.

  With this configuration, the user can confirm the program name and the like, and can grasp the success or failure of recording the desired program.

  Further, according to the present invention, the notification unit includes a recording status display unit that displays an image corresponding to a recording status of the information on the broadcast content.

  In the present invention, the recording status display unit further displays an image corresponding to the information on the broadcast content.

  Further, according to the present invention, the broadcast receiving device has a folding structure in which two housings are joined, and the recording status display unit is exposed to the outside in the closed state.

  With this configuration, the user can easily confirm the recording status of the broadcast content information even when the broadcast receiving device is in the closed state.

Also, the present invention provides a receiving step for receiving a broadcast signal, a recording step for recording information on the broadcast content included in the broadcast signal on a recording means, and predetermined data in the recorded broadcast content information is discontinuous. detecting invalid if it is, a detection step of the number of data in the information of the broadcast content to detect the missing if it is less than the predetermined number, disable or missing in the information of the broadcast content to be the detected the recording based on a broadcast receiving method comprising a notification step of notifying the recording conditions, the.

  In the present invention, the notifying step notifies information related to the program corresponding to the information of the broadcast content based on the program related information included in the broadcast signal.

  According to the present invention, when the broadcast content information included in the broadcast signal is recorded, the user is notified of the recording status of the broadcast content information for each predetermined period. The recording status of the content information can be easily confirmed.

  FIG. 1 is an external view of a foldable mobile phone terminal with a TV recording function. In the mobile phone terminal shown in FIG. 1, a first housing 50 having a first display unit 52 and a second housing 51 having an operation unit 53 are joined, and the first display unit 52 and the operation unit 53 are joined. It can be folded so that it is on the inside. In addition, open / close state detection switches 54 and 55 are provided inside the mobile phone terminal so that the open / close state of the mobile phone terminal can be detected.

  In addition, a speaker 56, a second display unit 57, and a recording state confirmation button 58 are provided outside the first housing 50. The speaker 56 performs ringtones for calls and mails, sounds of alarms, and audio output when receiving television. The second display unit 57 is composed of a smaller LCD than the first display unit 52, and normally displays the time, new mail, notification of incoming call, status display of the mobile phone terminal such as the remaining battery level and radio wave intensity. The recording state confirmation button 58 is a button for confirming the recording state of the mobile phone terminal. When the recording state confirmation button 58 is pressed by the user during recording in the closed state, the sound of the broadcast being recorded by the speaker 56 is displayed. Or the second display unit 57 displays a reproduced image. The recording state confirmation button 58 may be combined with other functions, and may be configured to function as a recording state confirmation button only when the broadcast recording function is activated.

  FIG. 2 is a configuration diagram of a foldable mobile phone terminal with a TV recording function. The mobile phone terminal shown in FIG. 2 is broadly divided into a wireless communication unit that transmits and receives data via a wireless communication network, a broadcast signal receiving unit that receives terrestrial digital broadcast signals, and a control unit 101 that controls the entire mobile phone terminal. .

  The wireless communication unit includes a cellular phone antenna 102, a wireless unit 103, a memory 104, a key operation unit 105, a second display unit 115, a first display unit 116, a data processing unit 111, an audio decoder unit 112, a speaker 113, The microphone 114 and the open / close detection switch 117 are configured. On the other hand, the broadcast signal receiving unit includes a broadcast receiving antenna 106, a digital terrestrial broadcast tuner 107, a demodulating unit 108, a demultiplexing unit 109, a video decoder unit 110, a recording unit 118, a video buffer 119, and an audio buffer 120. Is done.

  Hereinafter, the operation at the time of broadcast reception in the mobile phone terminal shown in FIG. 2 will be described. When reception of the terrestrial digital broadcast is started, the control unit 101 instructs the tuner 107 to select the channel that was selected last at the time of the previous activation. Tuner 107 selects a designated channel and outputs a signal received by antenna 106 to demodulation section 108. Demodulation section 108 performs OFDM demodulation on the received signal to extract TS, and outputs it to demultiplexing section 109. The demultiplexing unit 109 separates each TS packet constituting the TS into program information, service information, video stream data, audio stream data, a data carousel, and the like based on the packet ID, and outputs them to corresponding decoders. .

  The TS packet of the video stream data is sent to the video buffer 119, buffered, and reconstructed into data in decoding units (video PES data). The video decoder unit 110 decodes the video PES data, and causes the first display unit 116 to display an image using the decoded video PES data. On the other hand, the TS packet of audio stream data is sent to the audio buffer 120, buffered, and reconstructed into audio PES data. The audio decoder unit 112 decodes the audio PES data in synchronism with the decoding of the video decoding unit 110, and causes the speaker 113 to output sound based on the decoded audio PES data. Further, the data processing unit 111 processes the data carousel and causes the first display unit 116 to display an image using the processed data carousel in accordance with the display mode of the application, or stores the processed data carousel in the memory. The data is stored in 104. Note that the video buffer 119 and the audio buffer 120 determine that decoding is impossible when TS packet discontinuity or data error is detected during PES data reconstruction, and discard the PES data.

  Incidentally, an event information table is included in service information received in terrestrial digital broadcasting. This event information table stores program information such as the program name and broadcast time of a currently broadcast program, and program information of a program to be broadcast next time. The mobile phone terminal can realize viewing reservation and recording reservation based on such information. The mobile phone terminal can also make a recording reservation by acquiring program information via a network using a communication function.

  In the mobile phone terminal, when making a recording reservation, the control unit 101 acquires information on a program to be reserved for recording from the received event information table, creates reservation information, and stores it in the memory 104. The reservation information includes a channel number, a program name, a broadcast start time, a broadcast time, and the like.

  Next, the operation at the time of reserved recording in the mobile phone terminal shown in FIG. 2 will be described. The control unit 101 compares the time information of the mobile phone terminal with the broadcast start time of the recording reservation, and activates the broadcast signal receiving unit such as the tuner 107 when a predetermined time before the broadcast start time, Start receiving. Then, at the time when the broadcast start time is reached, the demodulation unit 108 performs OFDM demodulation on the received signal, extracts the TS, and outputs the TS to the demultiplexing unit 109. As described above, the demultiplexing unit 109 separates each TS packet constituting the TS into program information, service information, video stream data, audio stream data, a data carousel, and the like based on the packet ID, and corresponds to each. Output to the decoder.

  The TS packet of the video stream data is sent to the video buffer 119, buffered, and reconstructed into video PES data. On the other hand, the TS packet of audio stream data is sent to the audio buffer 120, buffered, and reconstructed into audio PES data. The reconstructed video PES data and audio PES data are sequentially recorded in the recording unit 118 for recording.

  FIG. 3 is a flowchart showing processing at the time of video PES data reconstruction in the video buffer 119. When receiving the TS packet (S0), the video buffer 119 analyzes the packet header, acquires continuity index information from the packet header, and the value of the continuity index data and the previously received continuity index data. Is analyzed (S1), and it is determined whether or not the received TS packet is discontinuous (S2).

  If there is no discontinuity in the received TS packet, the video buffer 119 removes the header information of the received TS packet and adds the remaining video data to the storage area (S3). Further, the video buffer 119 determines whether or not the video PES data is completed (S4). If the video PES data is incomplete, the video buffer 119 ends the process and waits for reception of the next TS packet.

  On the other hand, when the video PES data is completed, the video buffer 119 outputs and stores the completed video PES data to the recording unit 118 (S5), and adds 1 to the number of successful receptions held in advance (S6). . Furthermore, the video buffer 119 determines the continuity of the video PES data (whether there is a frame drop) (S7). If there is discontinuity in the video PES data, the video buffer 119 adds the number of missing video PES data to the number of reception failures held in advance (S8).

  On the other hand, when it is determined that the TS packet received in S2 is discontinuous, the video PES data being reconstructed including the TS packet becomes invalid. Therefore, the video buffer 119 discards the invalidated video PES data being reconstructed from the storage area (S12), and further adds 1 to the number of reception failures (S13).

  If it is determined in S7 that there is continuity in completion, or if the number of reception failures is updated in S8 or S13, the video buffer 119 next determines whether or not it is a reception status update timing ( S9). When it is the reception status update timing, the video buffer 119 detects the reception status from the reception success count and reception failure count at that time. The reception status is, for example, a reception success rate calculated from a ratio between the reception success number and the reception failure number. The reception status may be updated every predetermined time or every time a predetermined number of video PES data is received. For example, the number of received video PES data is counted every 30 seconds, and if video PES data for 15 seconds corresponding to 50% is missing, the reception status in the counting period is regarded as reception failure. When the reception status, in other words, the recording status is detected in this way, the video buffer 119 outputs information on the reception status to the video decoder unit 110. Based on this reception status information, the video decoder unit 110 causes the second display unit 115 to display information that allows the user to recognize reception success and failure, that is, recording success and failure, for example, an image (S10). Thereafter, the video buffer 119 resets both the reception success count and the reception failure count (S11), and starts counting the reception success count and the reception failure count in the next reception status counting period.

  FIG. 4 is a diagram illustrating a state of a recording state displayed on the second display unit 115. On the screen, a display indicating that recording is in progress, and the broadcast station name and program name acquired from the service information are displayed. Further, a block 200 corresponding to the recording time is displayed on the lower side of the screen, with the recording period totaling period (here, 30 seconds) as one block. FIG. 5 is an enlarged view of the recording time block 200. In the block 200 for this recording time, the recording status for each counting period from the start of recording is displayed in different colors and patterns. In the example of FIG. 5, a white dot block 201 on a black background indicates successful recording, a hatched block 202 indicates that recording has failed, and a white block 203 indicates that recording has not been performed.

  Such real-time display of transmission / reception enables the user to determine at a glance the success and failure of reception for each counting period, that is, the success and failure of recording, together with the progress of recording. For this reason, when the reception condition is bad, the user can select to stop the recording in order to reduce battery consumption or to continue the recording by changing the location. In addition, by collecting the reception status every predetermined time or every predetermined number of video PES data receptions, for example, the appropriate recording status corresponding to the recording status display space in the second display unit 115 is set. Display is possible. Further, the user can select to stop recording when the desired program is not recorded by displaying the name of the program being recorded.

  Next, a method for confirming the recording contents after the start of reserved recording will be described. When the recording state confirmation button 58 is pressed during recording by the user, the control unit 101 is notified of the pressing of the recording state confirmation button 58 via the key operation unit 105. When detecting that the recording state confirmation button 58 is pressed, the control unit 101 activates a built-in playback timer (not shown) and simultaneously transmits video PES data to the video decoder unit 110 in parallel with recording to the recording unit 118. Provide and perform simultaneous playback of the stream being recorded. At this time, the control unit 101 displays the reproduced image on the second display unit 115 when the open / close detection switch 117 detects the closed state and on the first display unit 116 when the open state is detected. .

  FIG. 6 is a diagram illustrating a recording situation and a recording content displayed together with the second display unit 115. The user can determine whether or not a program reserved by himself / herself is recorded from the displayed reproduced image. The control unit 101 performs control so that the decoding of the video stream is terminated by the expiration of the playback timer or the cancel command by the user operation, and only the recording to the recording unit 118 is continued. By such control, the user can confirm the received content as an image when reception failure, that is, recording failure continues. If the name of the program being recorded does not change even after the recording start time has elapsed, the user can easily confirm the recording contents by pressing the recording state confirmation button 58 and the desired program is recorded. It becomes possible to determine whether or not.

  As described above, in the mobile phone terminal of the present embodiment, it is possible to easily check the recording status and the recording content. In the above-described embodiment, the case where the user is notified of the recording status during the recording has been described. However, the present invention is similarly applied to the case where notification is made, for example, when displaying detailed information of the recording file after the recording is completed. can do. When the reception status is notified after the recording is completed, the user can select not to watch a program that cannot be viewed on the way from the beginning. In the above-described embodiment, the case where reserved recording is performed has been described. However, the present invention can be similarly applied to recording other than reserved recording.

  As described above, the broadcast receiving apparatus and the broadcast receiving method according to the present invention can easily check the status of information recording of broadcast contents, and are useful as a broadcast receiving apparatus and a broadcast receiving method.

It is an external view of a mobile phone terminal. It is a block diagram of a mobile phone terminal. It is a flowchart which shows the process at the time of video PES data reconstruction in a video buffer. It is a figure which shows the mode of the display of a video recording condition. It is an enlarged view of a recording time block. It is a figure which shows the mode of the display of a recording condition and the content of recording. It is a block diagram of the conventional mobile telephone terminal.

Explanation of symbols

  50 First casing, 51 Second casing, 52, 116 First display section, 53 Operation section, 54, 55, 117 Open / close state detection switch, 56 Speaker, 57, 115 Second display section, 58 Recording status confirmation Button, 101 Control unit, 102 Mobile phone antenna, 103 Radio unit, 104 Memory, 105 Key operation unit, 106 Broadcast receiving antenna, 107 Tuner, 108 Demodulation unit, 109 Demultiplexing unit, 110 Video decoder unit, 111 Data processing Part, 112 audio decoder part, 113 speaker, 114 microphone, 118 recording part, 119 video buffer, 120 audio buffer.

Claims (5)

Receiving means for receiving a broadcast signal;
Recording means for recording information of broadcast content included in the broadcast signal;
Detecting means for detecting invalidity when predetermined data is discontinuous in the recorded broadcast content information , and detecting missing when the number of data in the broadcast content information is less than a predetermined number ;
A notification means for notifying the recording status based on invalidity or omission in the information of the detected broadcast content to be recorded;
A broadcast receiving apparatus comprising:   2. The broadcast receiving apparatus according to claim 1, wherein the notifying unit notifies information related to a program corresponding to the information of the broadcast content based on program related information included in the broadcast signal.   The broadcast receiving apparatus according to claim 1, wherein the notification unit includes a recording status display unit that displays an image corresponding to a recording status of information on the broadcast content. A receiving step for receiving a broadcast signal;
A recording step of causing the recording means to record information of the broadcast content included in the broadcast signal;
A detection step of detecting invalidity when predetermined data is discontinuous in the recorded broadcast content information , and detecting missing when the number of data in the broadcast content information is less than a predetermined number ;
Based on the invalid or missing in the information of the detected broadcast contents which the recorded, a notification step of notifying the recording conditions,
A broadcast receiving method comprising:   5. The broadcast receiving method according to claim 4, wherein the notifying step notifies information related to a program corresponding to the information of the broadcast content based on program related information included in the broadcast signal.

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