JP2011055210A - Receiver, and method for using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To disclose a receiver that deletes reproduced video data or audio data from a memory to release a storage area of a storage part. <P>SOLUTION: The receiver includes: a storage part which stores video data or audio data received from the outside; and a processing part causes the storage part to store reproduction time for reproducing the video data or the audio data stored in the storage part, determines the reproduced video data or audio data based on the reproduction time, and deletes the reproduced video data or audio data from the storage part. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present application relates to a receiving apparatus and a method of using the receiving apparatus.

  In recent years, a tuner built-in type receiving terminal capable of receiving digital broadcasting has been used. A tuner built-in type receiving apparatus receives images and sounds by digital television broadcasting using a tuner, and outputs images and sounds. In addition, the tuner built-in type reception device can also store images and sounds by digital television broadcasting in a memory built in the reception device.

  However, the storage area of the memory is finite. If the stored television program is not deleted, the free storage area becomes small, and a situation occurs in which the user cannot record the television program that the user wants to record.

  An apparatus for recording a television program on a hard disk has been proposed. The proposed device automatically deletes television programs broadcast regularly such as weekly or daily from the hard disk. As a result, the hard disk is secured with an appropriate free space, and the hard disk capacity does not become insufficient when the user wants to record.

JP 2009-021911 A

  The proposed apparatus has a function of deleting a television program for each television program. In order to free up the capacity for recording a new TV program on the hard disk, the proposed apparatus has all the target TV programs even if the TV programs to be deleted are in the middle of viewing or not being viewed. Deleted. Therefore, a television program having a part that the user has not yet watched is also deleted.

  It is an object of the disclosed receiving apparatus to delete the reproduced video data or audio data from the memory and to release the storage area of the storage unit.

  In order to solve the above problems, a storage unit for storing video data or audio data received from the outside, and a playback time by playback of the video data or audio data stored in the storage unit are stored in the storage unit. There is provided a receiving device including a processing unit that determines reproduced video data or audio data based on the data and deletes the reproduced video data or audio data from a storage unit.

  The disclosed receiving apparatus has an effect of deleting the reproduced video data or audio data from the memory and releasing the storage area of the storage unit.

It is a figure which shows an example of the hardware constitutions of a receiver. It is a figure which shows an example of a function structure of a process part. It is a figure which shows an example of the reservation time preservation | save file F1. It is a figure which shows an example of the deletion method designation | designated save file. It is a figure which shows an example of a video recording data storage file. It is a figure which shows an example of a reproduction time preservation | save file. It is a figure which shows an example of the viewing-and-listening process by a process part. It is a figure which shows an example of the reservation video recording process by a process part. It is a figure which shows an example of the recording data reproduction | regeneration processing by a process part. It is a figure which shows an example of the video recording data automatic deletion process by a process part. It is a figure which shows an example of 1 screen program viewing and 1 recorded program reproduction | regeneration processing by a process part. It is a figure which shows an example of the deletion processing flow of the recording data by a receiver. It is a figure which shows an example of the video recording data deleted.

  Hereinafter, an embodiment of a receiving apparatus will be described with reference to the drawings.

  FIG. 1 is a diagram illustrating an example of a hardware configuration of a receiving apparatus. As illustrated in FIG. 1, the reception device 10 includes a storage unit 31, a communication unit 33, an audio output unit 35, an external storage device 36, an image display unit 37, an input unit 38, a power supply unit 39, and an arithmetic processing device 40. . The arithmetic processing unit 40 is connected to other constituent units of the receiving apparatus 10 by a transmission path for performing data transmission.

  The receiving device 10 may be, for example, a portable terminal that can receive digital television broadcasts, or a television receiver that can receive digital television broadcasts. When the receiving device 10 is a mobile terminal, the battery inside the power supply unit 39 is charged by the power feeding device 5 connected to the AC power supply by setting the receiving device 10 to the power feeding device 5 outside. ing. Note that the receiving device 10 may receive any one of video and audio data, video data related to a silent video without audio data, and audio data without video data. Various functions described later are realized for the data.

  The arithmetic processing unit 40 includes a digital signal processor (DSP) 41, a memory controller 42, a real-time clock (RTC) 43, a processing unit 44, and an audio output interface (hereinafter referred to as “I / F”) unit 45. The arithmetic processing device 40 further includes an image output I / F unit 46, a key scan unit 47, and a communication I / F unit 48. The arithmetic processing unit 40 may be a single semiconductor integrated circuit including these components, and each component may be a separate semiconductor integrated circuit.

  The DSP 41 is a microprocessor specialized for processing of voice and images. The DSP 41 has a function of decoding video data or audio data.

  The memory controller 42 supplies a memory control signal to the storage unit 31 to read data from the memory or write data to the memory. Further, the memory controller 42 performs synchronization control between data and instructions held in an L1 cache (Level 1 Cache Memory) incorporated in the processing unit 44 and data and instructions held in the storage unit 31.

  The RTC 43 is an integrated circuit that measures the current time. Unlike other integrated circuits, it can operate with power supplied from the built-in battery while the power is off. The RTC 43 outputs the current time to the processing unit.

  The processing unit 44 is a device that controls other component units included in the receiving device 10 by executing a program stored in the storage unit 31. The processing unit 44 includes an operation execution unit and an L1 cache not shown in FIG. The L1 cache is, for example, Static Random Access Memory (SRAM). Data and instructions frequently used by the arithmetic execution unit are held in the L1 cache. Functions realized by the processing unit 44 regarding data processing of video or audio data include a recording function, a reproduction time storage function, and a deletion function.

  For example, an audio output unit 35 that is a speaker is connected to the audio output I / F unit 45. The audio output I / F unit 45 converts the audio signal (for example, a PCM format digital signal) supplied from the processing unit 44 into an analog signal, and outputs the analog signal to the audio output unit 35.

  The image output I / F unit 46 is connected to an image display unit 37 which is a display device such as a Liquid Crystal Display (LCD), for example. The image output I / F unit 46 generates a display drive signal for driving the image display unit 37 based on the image signal transmitted from the processing unit 44 (for example, a signal in YUV or RGB format), and the image display unit A display drive signal is supplied to 37. The image display unit 37 displays an image of the television program according to the display drive signal.

  For example, the key scanning unit 47 is connected to an input unit 38 such as a keypad. The key scanning unit 47 detects an operation signal generated when the user of the receiving device 10 operates the input unit 38 and supplies the detected operation signal to the processing unit 44.

  The communication I / F unit 48 provides a path for transmitting data with the communication unit 33, and receives, for example, a transport stream packet (TS packet) described later from the communication unit 33.

  The storage unit 31 is a device that electrically stores data using a semiconductor element. The storage unit 31 is, for example, a lower hierarchy cache memory and / or a main memory arranged in a lower hierarchy of the L1 cache. The lower hierarchy cache memory includes the contents held in the cache memory built in the processing unit 44. The lower layer cache memory is, for example, an SRAM. The main memory is, for example, a Dynamic Random Access Memory (DRAM). The flash memory is, for example, Electrically Erasable Programmable Read Only Memory (EEPROM).

  The communication unit 33 has a function of receiving a radio signal including video or audio data and acquiring video or audio data that is a digital signal from the received radio signal. The communication unit 33 receives radio waves of terrestrial digital broadcasting via, for example, a reception antenna (not shown). The communication unit 33 extracts radio waves in a specific frequency band after performing baseband processing such as AD conversion, Fourier transform, and despreading from radio waves received by the receiving antenna. For example, the communication unit 33 selects a predetermined channel of terrestrial digital broadcasting and extracts radio waves of the predetermined channel.

  The communication unit 33 further converts the extracted digital signal of the specific frequency into a transport stream having a plurality of TS (Transport Stream) packets. Details of the TS packet format are described in TS of ISO / IEC1381-1.

  Note that the receiving antenna may be built in the communication unit 33 as a chip antenna, or may be an external antenna disposed outside the communication unit 33.

  The external storage device 36 is a disk array of magnetic disks, a solid state drive (SSD) using flash memory, or an optical disk drive. The external storage device 36 can store programs and data stored in the storage unit 31. The external storage device 36 may be configured to supply data to the outside by inserting a recording medium such as a memory card or a digital versatile disc (DVD). In this case, the program for realizing the function of the processing unit 44 and the television program stored in the storage unit 31 are received from the outside via a recording medium, or transferred to another receiving device via the recording medium. I can do it.

  The power supply unit 39 is a device for supplying electricity to each component unit of the receiving device 10 and has a battery. The power supply unit 39 supplies electricity stored in the battery to each component unit of the receiving apparatus 10 via a power supply wiring not shown in FIG.

  FIG. 2 is a diagram illustrating an example of a functional configuration of the processing unit. The processing unit 44 implements the functions shown in FIG. 2 by executing a program stored in the storage unit 31. Functions realized by the processing unit 44 include UI (user interface) processing P1, reservation time input processing P2, deletion method input processing P3, recorded program playback / stop processing P4, program viewing processing P5, and recording processing P10. The functions realized by the processing unit 44 further include a no-operation state detection process P11, a charge detection process P12, a deletion time detection process P13, a deletion method determination process P14, a recorded data deletion process P15, a playback time update process P16, and a viewing data extraction process. There is P21 and recorded data extraction processing P22. The functions realized by the processing unit 44 further include an audio switching process P23, an audio data decoder P24, an image data decoder P25, a first recorded image data decoder P26, a second recorded image data decoder P27, and a screen display process P28.

  Further, the functions of the audio data decoder P24, the image data decoder P25, the first recorded image data decoder P26, and the second recorded image data decoder P27 may be realized by the DSP 41 instead of the processing unit 44.

  The program executed by the processing unit 44 may be coded so as to constitute a task, a process, and a thread that realize each of the above functions. Then, the processing unit 44 executes a program to realize a multitask that processes the above functions in parallel while switching a plurality of tasks by using a task scheduling function and a storage area management function. You may do it.

  Further, the processing unit 44 holds at least a part of the reserved time storage file F1, the deletion method designation storage file F2, the recorded data storage file F3, and the reproduction time storage file F4 in the L1 cache built in the processing unit 44. .

  2 will be described with reference to the reserved time storage file F1 to the reproduction time storage file F4 shown in FIGS.

  The UI process P1 includes a reservation time input process P2, a deletion method input process P3, a recorded program playback / stop process P4, and a program viewing process P5 specified by the operation signal output from the input unit 38 detected by the key scan unit 47. It is a process that activates one of them.

  The reservation time input process P2 is a process of registering the reservation time information S1 input as an operation signal in the reservation time storage file F1. The reserved time information S1 includes the TV program information of the TV program to be reserved for recording and the reserved time of the TV program to be reserved for recording.

  FIG. 3 is a diagram illustrating an example of the reservation time storage file F1. The reserved time storage file F1 is a data file for registering a television program to be stored in the receiving device 10.

  The reserved time storage file F1 includes a program name column 101, a status information column 102, and a reserved time column 103.

  In the program name column 101, television program information included in the reserved time information S1 is registered. The TV program information is, for example, identification information for specifying a channel, a TV program name, and a TV program.

  In the status information column 102, status information of the television program registered in the program name column 101 is registered. In the status information, information indicating whether or not the television program has been saved is registered. If the TV program is not saved, "Not" is registered. If the TV program is saved, "Done" is registered. If the TV program is being recorded, "Medium" is registered. .

  In the reservation time column 103, the reservation time included in the reservation time information S1 is registered. In the reserved time column 103, a reserved time of a TV program to be recorded specified by the TV program information registered in the program name column 101 is registered. The reserved time is a time for recording a television program.

  The deletion method input process P3 is a process of registering the deletion method designation information S2 input as an operation signal in the deletion method designation saving file F2. The deletion method specified in the deletion method specification information S2 is at least one of 1) when no operation is performed, 2) when a deletion time is specified by a timer, 3) when a charging stand is connected, and 4) when playback is finished.

  FIG. 4 is a diagram illustrating an example of a deletion method designation saving file. The deletion method designation saving file F2 is a data file in which the timing for deleting a recorded television program is registered.

  The deletion method designation saving file F2 has a program name column 111, a no-operation column 112, a timer column 113, a charging time column 114, and a reproduction end time column 115.

  In the program name column 111, television program information included in the deletion method designation information S2 is registered. In the program name column 111, the same TV program information as the TV program information registered in the program name column 101 of the reserved time storage file F1 is registered.

  In the no-operation column 112, information specifying whether or not the reception device 10 included in the deletion method designation information S2 is deleted when there is no operation is registered. In the no-operation column 112, it is specified whether or not the television program registered in the program name column 111 deletes the recording information when the receiving device 10 is not operated. For example, “program C” is deleted when there is no operation because the no-operation column 112 is “ON”. Note that “no operation” refers to a time when the receiving apparatus 10 has a low processing load related to processing other than deletion processing. When the receiving device 10 is a mobile terminal, it means a case where the receiving device 10 transitions to a “standby” state or a state where there is no operation of the input unit 38 for a certain period. The recording deletion process imposes a processing load on the processing unit 44, so that the TV program deletion process does not delay the execution of other processes of the receiving device 10 by performing the process when there is no operation.

  Registered in the timer column 113 is a time at which the recorded program included in the deletion method designation information S2 is deleted. For example, “program B” indicates that the recorded program is deleted at “0:30”. Since the recording deletion process imposes a processing load on the processing unit 44, the television program deletion process is performed by setting the deletion time in a time zone when the receiving apparatus 10 does not execute other processes in parallel. The execution of other processes can be prevented from being delayed.

  In the charging time column 114, information specifying whether or not the receiving device 10 included in the deletion method designation information S2 is deleted at the time of charging is registered. For example, “program A” indicates that the charging time column 114 is “ON”, so that it is deleted when the receiving apparatus 10 is charged. When the receiving device 10 is a mobile terminal, the receiving device 10 is not used by the user by installing the receiving device 10 in the power feeding device 5. That is, it is a time when the receiving apparatus 10 does not execute other processing. Therefore, by executing the deletion process during charging, the television program deletion process can prevent the execution of other processes of the receiving device 10 from being delayed.

  In the reproduction end time column 115, information for specifying whether or not to execute deletion processing at the end of reproduction of the recorded program included in the deletion method designation information S2 is registered. By deleting the recorded program without delay at the end of reproduction, the storage capacity for storing the television program in the storage unit 31 can be maximized.

  The recorded program playback / stop process P4 controls the start or stop of playback by giving a playback or stop signal S5 input as an operation signal to the recorded data extraction process P22. The reproduction or stop signal S5 specifies a television program to be reproduced or stopped.

  Further, the recorded program playback / stop process P4 reads the deletion method designation storage file F2, and when the TV program currently being viewed is specified to be deleted at the end of playback, playback or stop is performed when playback of the TV program is stopped. The signal S5 is output to the deletion method determination process P14. The deletion method determination process P14 deletes a television program using the playback or stop signal S5 as a trigger event.

  The program viewing process P5 outputs the selected program information S7 input as an operation signal to the viewing data extraction process P21. The selected program information S7 specifies a television program selected for viewing. The program viewing process P5 can cause the viewing data extraction process P21 to extract the reception channel carrying the television program specified by the selected program information S7 from the received signal transmitted from the communication unit 33.

  The recording process P10 calls the reserved time storage file F1 and detects the TV program that has not been recorded yet and the reserved time of the TV program by detecting an entry registered as “not yet” in the status information column 102. To do. Further, when the current time is acquired from the recording time and the RTC of the read television program with an unrecorded status, the recording process P10 extracts the data of the recording target channel read from the communication unit 33. The recording process P10 registers the extracted data in the recording data storage file F3.

  FIG. 5 is a diagram illustrating an example of a recorded data storage file. The recorded data storage file F3 has recorded data for each recorded program. The data format 120 of stream data is an example of the data format of stream data of one program data. For example, when a TV program is broadcast by “one-segment partial reception service for mobile phones / mobile terminals”, the data is broadcast in a stream format according to MPEG-2 (Moving Picture Experts Group-2) TS. In that case, the data of the program A is stored in the storage unit 31 as stream data according to MPEG-2 TS.

  For example, as shown in the data format 120, the data of the program A is stream data having a plurality of 188-byte TS packets. One of video data, audio data, and control information is stored in the TS data in the TS packet. The video data in the TS packet and the audio data in the TS packet are identified by the frame position number n included in the frame information, and are related as video data and audio data having the same time stamp.

  The no-operation state detection process P11 reads the deletion method designation storage file F2 when the no-operation state has elapsed for a predetermined period, and determines whether there is a television program name specified to be deleted when there is no operation. If there is a television program name specified to be deleted when there is no operation, the non-operation state detection process P11 notifies the deletion method determination process P14 of the television program name.

  When the charging detection process P12 detects that the receiving apparatus 10 is installed in the power supply apparatus 5 shown in FIG. 1, the deletion method designation storage file F2 is read out, and there is a TV program name specified to be deleted during charging. It is determined whether or not. If there is a TV program name that is specified to be deleted during charging, the charging detection process P12 notifies the deletion method determination process P14 of the TV program name.

  The deletion time detection process P13 reads the deletion method designation storage file F2, and notifies the deletion method determination process P14 of the television program name when the designated time of the television program designated to be deleted by the timer matches the time read from the RTC 43.

  The deletion method determination process P14 is a process in which the recorded TV program notification / playback process P4, the no-operation state detection process P11, the charge detection process P12, and the deletion time detection process P13 are duplicated. The recorded data deletion process P15 is notified as one deletion target program. In addition, when the TV program to be deleted is being viewed, the deletion method determination process P14 notifies the recorded data deletion process P15 after stopping the program reproduction.

  When the recorded data deletion process P15 is notified of the recorded program to be deleted from the deletion method determination process P14, the recorded data deletion process P15 reads the reproduction time storage file F4 and acquires the reproduction time of the television program notified as the deletion target. Then, the recorded data deletion process P15 deletes, from the recorded data storage file F3, the video or audio data of the portion corresponding to the acquired reproduction time in the TV program data to be deleted. When the deletion process is completed, the recorded data deletion process P15 notifies the deleted TV program name and deletion time to the reproduction time update process P16. In the recorded data deletion process P15, when all the TV programs to be deleted are deleted, the TV program data deleted from the reserved time storage file F1 is deleted.

  The recorded data deletion process P15 can also delete the TV program specified by the TV program deletion signal S6 based on the TV program deletion signal S6 transmitted from the UI process P1.

  The playback time update process P16 receives the playback time S3 output from the first recorded image data decoder P26 and the playback time S4 output from the second recorded image data decoder P27, and receives the received playback time S3 and playback time S4. Register in the playback time storage file F4. In addition, the reproduction time update process P16 updates the reproduction time storage file F4 with the deleted television program name and the deletion time notified from the recorded data deletion process P15. In other words, the playback time of the television program registered in the playback time storage file F4 is subtracted by the playback time notified from the playback time update process P16.

  FIG. 6 is a diagram illustrating an example of a playback time storage file. The reproduction time storage file F4 is a file that holds the reproduction time of a television program that is decoded by the first recorded image data decoder P26 or the second recorded image data decoder P27 and reproduced by the image display unit 37. The reproduction time storage file F4 has a program name column 131 and a reproduction time column 132.

  In the program name column 131, the same TV program information as the TV program information registered in the program name column 101 of the reserved time storage file F1 is registered. However, it is deleted from the information relating to the deleted television program notified from the recorded data deletion processing P15 and the reproduction time storage file F4. In the same entry as the program name column 131 in the reproduction time column 132, a reproduction time is registered for the television program registered in the program name column 131.

  The viewing data extraction process P21 receives the stream data transmitted from the communication unit 33 and the selected program information S7 transmitted from the program viewing process P5. The viewing data extraction process P21 extracts a channel for broadcasting the television program specified by the selected program information S7 from the received stream data. For example, a specific channel of digital television broadcasting is designated by the selected program information S7, and the viewing data extraction process P21 extracts stream data of the designated channel.

  For example, when a TV program is broadcast by “one-segment partial reception service for mobile phones / mobile terminals”, data is broadcast in a stream format according to MPEG-2 TS. Therefore, the data of the program A is stored in the storage unit 31 as a data format broadcast by MPEG-2 TS.

  When the selected program information S7 designates “one-segment partial reception service for mobile phones / mobile terminals”, as shown in the data format 120 of FIG. 5, a plurality of 188-byte TS packets are included. One of video data, audio data, and control information is stored in the payload in the TS packet. The viewing data extraction process P21 extracts video data from the TS packet, and transmits the extracted video data to the image data decoder P25. In addition, the viewing data extraction process P21 extracts audio data from the TS packet, and transmits the extracted audio data to the audio switching process P23.

  The recorded data extraction process P22 reads recorded program data to be reproduced, which is designated by the playback or stop signal S5 transmitted from the recorded program playback / stop process P4, from the recorded data storage file F3. The recorded data extraction process P22 further reads the playback time from the beginning of the read recorded data from the playback time storage file F4. Then, the recorded data extraction process P22 extracts video data and audio data from the read recorded data at a point where the playback time has elapsed from the beginning of the recorded data.

  The recorded data extraction process P22 transmits the extracted image data to the first recorded image data decoder P26 or the second recorded image data decoder P27. When the recorded data extraction process P22 transmits the extracted stream data to the second recorded image data decoder P27, the playback or stop signal S5 designates that two screens are displayed on the image display unit 37. .

  The recorded data extraction process P22 transmits the extracted audio data to the audio switching process P23.

  The audio switching process P23 selects any audio data from the audio data transmitted from the viewing data extraction process P21 and the recorded data extraction process P22. This is because two television programs may be displayed on the image display unit 37. Two television programs can be displayed on the image display unit 37, but the audio output from the audio output unit 35 may output the audio of one of the two TV programs. In this case, the audio switching process P23 selects one of the audio data transmitted from the viewing data extraction process P21 and the recorded data extraction process P22 according to the audio selection signal S11 transmitted from the UI process P1.

  The audio switching process P23 transmits the selected audio data to the audio data decoder P24. For example, when audio data is carried by “one-segment partial reception service for mobile phones / mobile terminals”, the audio data is encoded by Advanced Audio Coding (AAC). Therefore, the audio data decoder P24 decodes the audio data extracted from the TS packet into, for example, PCM format audio digital data in accordance with AAC. The audio output I / F 45 converts the decoded audio digital data into an analog signal, and outputs the converted analog signal to the audio output unit 35.

  The image data decoder P25 receives the video data transmitted from the viewing data extraction process P21 and decodes the video data. The decoded data is transmitted to the screen display process P28.

  The first recorded image data decoder P26 receives the video data transmitted from the recorded data extraction process P22 and decodes the video data. The data received by the first recorded image data decoder P26 is an image displayed as one screen on the image display unit 37 or one screen of an image displayed as two screens on the image display unit 37. The decoded data is transmitted to the screen display process P28.

  The second recorded image data decoder P27 receives the video data transmitted from the recorded data extraction process P22 and decodes the video data. The data received by the second recorded image data decoder P27 is one screen image displayed on the image display unit 37 as two screens. That is, the second recorded image data decoder P27 is a decoder used when the image display unit 37 displays two screens. The decoded data is transmitted to the screen display process P28.

  When the video data is carried by, for example, “one-segment partial reception service for mobile phones / mobile terminals”, the video data is H.264. H.264 is encoded. In this case, the image data decoder P25, the first recorded image data decoder P26, and the second recorded image data decoder P27 In accordance with H.264, the video data is decoded and converted into a format (for example, YUV or RGB format) that can be displayed on the image display unit 37.

  The image data decoder P25, the first recorded image data decoder P26, and the second recorded image data decoder P27 are referred to as “reproduction functions” of the processing unit 44.

  The screen display process P28 changes the decoded image data received from the image data decoder P25, the first recorded image data decoder P26, and the second recorded image data decoder P27 to an appropriate size for the image display unit 37. Then, the screen display process P28 sends the data to the image output I / F unit 46 at an appropriate timing. In the screen display process P28, when two pieces of image data are transmitted, the image signal whose screen mode has been changed is output to the image output I / F unit 46 so as to display two images on the image display unit 37. To do.

  FIG. 7 is a diagram illustrating an example of viewing processing by the processing unit. In the viewing process, a UI process P1, a program viewing process P5, a viewing data extraction process P21, an audio switching process P23, an audio data decoder P24, an image data decoder P25, and a screen display process P28 are performed among the processes shown in FIG. .

  The key scanning unit 47 detects an operation signal related to viewing processing that is generated when the user of the receiving device 10 operates the input unit 38. The key scan unit 47 transmits an operation signal related to the viewing process to the UI process P1. When the UI process P1 receives an operation signal related to the viewing process, the UI process P1 starts the program viewing process P5.

  The program viewing process P5 gives the selected program information S7 to the viewing data extraction process P21, and operates the viewing data extraction process P21 so as to extract viewing channel data from the stream data transmitted from the communication unit 33.

  The image data extracted by the viewing data extraction process P21 is transmitted to the image data decoder P25, and the image data decoder P25 decodes the image data. The decoded image data is output to the image display unit 37 via the image output I / F unit 46 by the screen display process P28. The audio data extracted by the viewing data extraction process P21 is selected by the audio switching process P23 and then transmitted to the audio data decoder P24. The audio data decoder P24 decodes the audio data. The decoded audio data is converted into an analog signal by the audio output unit 35, and the analog signal is supplied to the audio output unit 35 via the audio output I / F unit 45, so that the audio is output from the audio output unit 35. Is done.

  FIG. 8 is a diagram illustrating an example of a scheduled recording process by the processing unit. In the scheduled recording process, a UI process P1, a scheduled time input process P2, and a recording process P10 are performed among the processes shown in FIG.

  The key scanning unit 47 detects an operation signal related to the scheduled recording process that is generated when the user of the receiving device 10 operates the input unit 38. The key scan unit 47 transmits an operation signal related to the reserved recording process to the UI process P1. When the UI process P1 receives an operation signal related to the reservation recording process, the UI process P1 starts the reservation time input process P2. The reservation time input process P2 registers the reservation time information S1 in the reservation time storage file F1.

  The recording process P10 calls the reserved time storage file F1 and acquires the current time from the reserved time and the RTC 43 of the entry TV program whose status information in the status information column 102 is “not yet”. When both times coincide, the recording process P10 extracts the data of the recording target channel read from the communication unit 33. The recording process P10 registers the extracted data in the recording data storage file F3.

  FIG. 9 is a diagram illustrating an example of recorded data reproduction processing by the processing unit. In the recorded data reproduction process, among the processes shown in FIG. 2, the UI process P1, the recorded program reproduction / stop process P4, the recorded data extraction process P22, the audio switching process P23, the audio data decoder P24, and the first recorded image data decoder P26. , And a screen display process P28 is performed. In the recorded data reproduction process, a reproduction time update process P16 is further performed. When the recorded data is reproduced on two screens, the recorded data reproduction process is performed by the second recorded image data decoder P27 in addition to the above process.

  The key scanning unit 47 detects an operation signal related to reproduction of recorded data, which is generated when the user of the receiving device 10 operates the input unit 38. The key scan unit 47 transmits an operation signal related to recording data reproduction to the UI process P1. When the UI process P1 receives an operation signal related to recording data reproduction, the UI process P1 supplies the operation signal to the recorded program reproduction / stop process P4.

  The recorded program playback / stop process P4 transmits a playback or stop signal S5 to the recorded data extraction process P22. In the recorded data extraction process P22, the TV program to be played, which is designated by the playback or stop signal S5 transmitted from the recorded program playback / stop process P4, is read from the recorded data storage file F3. The recorded data extraction process P22 further extracts video data and audio data at the playback time from the beginning of the recorded data.

  The extracted video data is decoded by the first recorded image data decoder P26, and the decoded image data is output to the image display unit 37 by the screen display process P28. The extracted audio data is decoded by the audio data decoder P24, and the decoded audio is output by the audio output unit.

  The reproduction time update process P16 registers the reproduction time S3 output by the first recorded image data decoder P26 in the reproduction time storage file F4.

  When the image display unit 37 displays two screens, the recorded data extraction process P22 outputs the extracted video data related to the second program display to the second recorded image data decoder P27. The second recorded image data decoder P27 decodes the extracted video data, and the decoded image data is supplied to the screen display process P28. The extracted audio data related to the second program display is decoded by the audio data decoder P24. The audio switching process P23 supplies the audio data of one of the two TV programs to the audio data decoder.

  FIG. 10 is a diagram illustrating an example of recorded data automatic deletion processing by the processing unit. In the recorded data automatic deletion processing, UI processing P1, deletion method input processing P3, no operation state detection processing P11, charge detection processing P12, deletion time detection processing P13, deletion method determination processing P14, recording data deletion processing P15, and playback time Update processing P16 is performed.

  The UI process P1, the deletion method input process P3, the no-operation state detection process P11, and the charge detection process P12 become deletion targets in the deletion method determination process P14 when the deletion condition specified in the deletion method specification saving file F2 is satisfied. Notify TV programs.

  The deletion method determination process P14 notifies the recorded data deletion process P15 of the TV program to be deleted notified from any one of the UI process P1, the deletion method input process P3, the no-operation state detection process P11, and the charge detection process P12. . When the recorded data deletion process P15 is notified of the television program to be deleted from the deletion method determination process P14, the recorded data deletion process P15 reads the reproduction time storage file F4 and acquires the reproduction time of the television program notified as the deletion target. Then, the recorded data deletion process P15 deletes, from the recorded data storage file F3, the video or audio data of the portion corresponding to the acquired reproduction time in the TV program data to be deleted. When the deletion process is completed, the recorded data deletion process P15 notifies the reproduction time update process P16 of the deleted program name and the deletion time.

  FIG. 11 is a diagram illustrating an example of a one-screen program viewing and one recorded program reproduction process by the processing unit. In the one-screen program viewing and one recorded program playback process, a UI process P1, a recorded program playback / stop process P4, a program viewing process P5, a viewing data extraction process P21, and a recorded data extraction process P22 are performed. In the one-screen program viewing and one-record program reproduction process, an audio switching process P23, an image data decoder P25, a first recorded image data decoder P26, an audio data decoder P24, a screen display process P28, and a reproduction time update process P16 are further performed. Is called.

  The key scanning unit 47 detects an operation signal related to one-screen program viewing and one-recorded program reproduction processing, which is generated when the user of the receiving device 10 operates the input unit 38. The key scanning unit 47 transmits operation signals related to the one-screen program viewing and one recorded program reproduction process to the UI process P1. When the UI process P1 receives an operation signal related to one-screen program viewing and one recorded program playback process, the UI process P1 starts a program viewing process P5 and a recorded program playback / stop process P4.

  The program viewing process P5 gives the selected program information S7 to the viewing data extraction process P21, and operates the viewing data extraction process P21 so as to extract viewing channel data from the stream data transmitted from the communication unit 33.

  The image data extracted by the viewing data extraction process P21 is transmitted to the image data decoder P25, and the image data decoder P25 decodes the image data. The decoded image data is output to the image display unit 37 via the image output I / F unit 46 by the screen display process P28. The audio data extracted by the viewing data extraction process P21 is selected by the audio switching process P23 and then transmitted to the audio data decoder P24. The audio data decoder P24 decodes the audio data. The decoded audio data is converted into an analog signal by the audio output unit 35, and the analog signal is supplied to the audio output unit 35 via the audio output I / F unit 45, so that the audio is output from the audio output unit 35. Is done.

  The recorded program playback / stop process P4 transmits a playback or stop signal S5 to the recorded data extraction process P22. In the recorded data extraction process P22, the TV program to be played, which is designated by the playback or stop signal S5 transmitted from the recorded program playback / stop process P4, is read from the recorded data storage file F3. The recorded data extraction process P22 further extracts video data and audio data at the playback time from the beginning of the recorded data.

  The extracted video data is decoded by the first recorded image data decoder P26, and the decoded image data is output to the image display unit 37 by the screen display process P28. The extracted audio data is decoded by the audio data decoder P24, and the decoded audio is output by the audio output unit 35.

  The reproduction time update process P16 registers the reproduction time S3 output by the first recorded image data decoder P26 in the reproduction time storage file F4.

  In this way, one of the two screens is a viewing screen and one of the two screens is a recorded data playback screen. This increases the chances of playback of recorded data even during viewing, and deletes recorded data. Facilitate. Therefore, the recorded data reproduction opportunities increase, and the video or audio data of the portion corresponding to the reproduction time in the television program stored in the storage unit 31 is deleted from the storage unit 31, thereby storing the storage capacity of the storage unit 31. Can be released.

  FIG. 12 is a diagram illustrating an example of a recording data deletion processing flow by the receiving device. FIG. 13 is a diagram illustrating an example of recorded data to be deleted. Hereinafter, the recording data deletion processing flow will be described with reference to FIGS.

  First, the processing unit 44 performs a deletion determination process as to whether or not there is a recorded television program to be deleted (S101). In other words, the processing unit 44 records the recordings related to “the receiving device 10 is in an inoperative state”, “deletion time”, “the receiving device 10 is being charged”, and “reproduction end” registered in the deletion method designation saving file F2. It is determined whether a TV program deletion condition is satisfied. If there is a TV program to be deleted corresponding to any of the above conditions (Yes in S102), the processing unit 44 proceeds to step S103, does not correspond to any of the above conditions, and is to be deleted. If there is no television program (No in S102), step S101 is repeated.

  FIG. 13 shows the stream data 122 before automatic deletion. As shown in the data format 120 of FIG. 5, the TS data portion in the TS packet includes video data. In the case of television broadcasting, in order to manage frames that are moving image screen data, it is transmitted in units of frame data called Group Of Pictures (GOP). The GOP has a plurality of image data, and includes, for example, an “I frame (Intra-coded Frame)”, a “B frame (Bi-directional Predicted Frame)”, and a “P frame (Predicted Frame)”. The “I frame” can be decoded without other frames before and after, but the “B frame” and the “P frame” are decoded by inter-frame prediction, and therefore require information on other frames. Note that “I frame”, “B frame”, and “P frame” correspond to TS packets including the image data shown in FIG.

  The stream data 122a before automatic deletion shown in FIG. 13 shows only “I frame” or “B frame” of TS packets for the sake of explanation. Although not shown, the television program to be streamed includes not only “I frame” or “B frame” which is image data, but also audio data associated with the same time stamp.

  The stream data 122a before automatic deletion is data registered in the recorded data storage file F3. The reproduction time storage file F4a indicates the reproduction time T0 of the stream data 122a before automatic deletion. The stream data 122b after the automatic deletion is image data that has been subjected to automatic image data deletion processing described below. The stream data 122b after the automatic deletion is data registered in the recorded data storage file F3. The reproduction time storage file F4b indicates the reproduction time T0 of the stream data 122b after automatic deletion. As shown in the reproduction time storage files F4a and F4b, the program data to be deleted is “program A”.

  In step S103 of FIG. 12, the processing unit 44 reads the playback time T0 “30:00 (min)” of the TV program to be deleted from the playback time storage file F4a (S103). The processing unit 44 further reads out a frame whose frame position number is n from the stream data 122a before automatic deletion of the recorded data storage file F3 (S104). When the frame is first read, since the frame position number n is “0”, the processing unit 44 reads the frame whose frame position number is “0”. In other words, the processing unit 44 reads the first frame of the program image data to be deleted.

  The processing unit 44 reads the header arranged at the head of the read frame, and determines whether or not the read frame is an “I frame” (S105). If the read frame is not an “I frame” (No in S105), the processing unit 44 increments the frame position number to set the frame next to the read frame as a read target frame (S106). In other words, the number of frame position numbers n of the read target frame is increased by one. The processing unit 44 performs Step S104 again after Step S106.

  If the read frame is an “I frame” (S105 Yes), the processing unit 44 stores the frame position number n in the storage unit 31 as “read frame number N” (S107). In other words, in step S107, the processing unit 44 stores the frame position number of “I frame” in the storage unit 31 as “read frame number N”.

  After storing the frame position number, the processing unit 44 calculates an accumulated time T1 from the first frame (frame position number “0”) to the nth frame (frame position number n) (S108). The accumulated time T1 is obtained by reading the time stamp included in the header of the frame, obtaining the time difference between the time stamp of the read frame and the time stamp of the previous frame, and accumulating the time difference.

  The processing unit 44 calculates whether or not the reproduction time T0 is less than or equal to the cumulative time T1 (S109). When the reproduction time T0 is larger than the total time T1 (S109, No), the processing unit 44 sets the read frame position number n as the frame number N2 before incrementing, and sets the total time T1 as the total time T2 before incrementing. save. Thereafter, the processing unit 44 executes Step S106. Thus, in step S109, the calculation is repeated until the accumulated time T1 exceeding the reproduction time T0 is reached.

  When the reproduction time T0 is equal to or longer than the cumulative time T1 (S109, Yes), the processing unit 44 determines whether or not the reproduction time T0 and the cumulative time T1 are the same (S111). When the reproduction time T0 and the accumulated time T1 are not the same (S111, No), the processing unit 44 sets the accumulated time T1 to the accumulated time T2 before incrementing, and sets the read frame number N before incrementing. The frame number N2 is set (S112). Thus, since the frame exceeding the reproduction time T0 is read out in step S109, the data that has not been reproduced yet is deleted by using the frame number of the frame before increment and the cumulative time T1 in step S112. To avoid the inconvenience.

  In addition, “I frame” is a frame that is encoded without using inter-frame prediction, unlike “P frame” and “B frame”. “P frame” and “B frame” require “I frame” for inter-frame prediction. Since the frame read in step S105 is an “I frame”, the “I frame” is retained at the head of the remaining recorded data by deleting the frame before the “I frame”. Enables playback of stored data. For example, even if the stream data 122a before automatic deletion in FIG. 12 is corrected to the stream data 122b after automatic deletion by automatic deletion, the first frame of the stream data 122b after automatic deletion is “I frame”. Therefore, the stream data 122b after automatic deletion can be reproduced from the first frame.

  Next, the processing unit 44 deletes image data and related audio data from the head to the Nth frame (S114). As shown in FIG. 5, the image data in the TS packet is related to the audio data by the time stamp and the frame position number. Therefore, the processing unit 44 also deletes the sound data associated with the image data to be deleted together with the image data.

  The processing unit 44 sets the reproduction time T0 as a time obtained by subtracting the cumulative time T1 from the reproduction time T0 (S115). The processing unit 44 updates the reproduction time storage file F4 with the reproduction time T0 (S116). For example, as shown in FIG. 13, the reproduction time T0 is “30:00 (sec)”, and the reproduced data is deleted before the “I frame”, so the updated reproduction time T0 is “ 1:00 (sec) ".

Regarding the above embodiment, the following additional notes are disclosed.
[Appendix 1]
A storage unit for storing video data or audio data received from the outside;
The reproduction time of the video data or audio data stored in the storage unit is stored in the storage unit, the reproduced video data or audio data is determined based on the reproduction time, and the reproduced video data Or a processing unit for deleting audio data from the storage unit;
A receiving apparatus comprising: (1)
[Appendix 2]
The receiving device further includes a display unit for displaying the video data or audio data,
The processing unit further reproduces video data or audio data related to a plurality of different TV programs stored in the storage unit simultaneously on the display unit,
The receiving apparatus according to appendix 1, wherein the reproduction time is stored in the storage unit with each reproduction time of video data or audio data related to the plurality of television programs. (2)
[Appendix 3]
Deletion of the reproduced video data or audio data is a portion corresponding to the reproduction time when the video data or audio data is not viewed, reproduced or recorded, or when the receiving device is charged or at a specified time. The receiving apparatus according to appendix 1 or 2, wherein the video data or audio data is deleted from the storage unit. (3)
[Appendix 4]
In the deletion of the reproduced video data or audio data, at the end of the reproduction of the video data or audio data stored in the storage unit, a part of the video data or audio data corresponding to the reproduction time is deleted from the storage unit. The receiving apparatus according to appendix 1 or 2, wherein: (4)
[Appendix 5]
A data management method in a receiving device,
The processing unit of the receiving device stores video data or audio data received from the outside in the storage unit of the receiving device;
The processing unit of the receiving device stores in the storage unit a reproduction time due to reproduction of video data or audio data stored in the storage unit;
The processing unit of the receiving device determines the reproduced video data or audio data based on the reproduction time, and deletes the reproduced video data or audio data from the storage unit;
A method characterized by comprising: (5)
[Appendix 6]
The receiving device further includes a display unit for displaying the video data or audio data,
The processing unit further includes a step of simultaneously reproducing video data or audio data related to a plurality of different television programs stored in the storage unit on the display unit,
The method according to claim 5, wherein the storing step includes storing the reproduction time of each of video data or audio data related to the plurality of television programs in the storage unit.
[Appendix 7]
In the deletion step, the video or audio data of a portion corresponding to the playback time is obtained when the video data or audio data is viewed or played back or when recording is not performed, or when the receiving device is charged, or at a specified time. The method according to appendix 5 or 6, including deleting from the storage unit.
[Appendix 8]
The deleting step includes deleting a part of video or audio data corresponding to the reproduction time from the storage unit at the end of reproduction of the video data or audio data stored in the storage unit. The method according to appendix 5 or 6.
[Appendix 9]
A program for data management in a receiving device,
The processing unit of the receiving device stores video data or audio data received from the outside in the storage unit of the receiving device;
A procedure in which the processing unit of the receiving device stores in the storage unit a reproduction time due to reproduction of video data or audio data stored in the storage unit;
Determining the reproduced video data or audio data based on the reproduction time, and deleting the reproduced video data or audio data from the storage unit;
A program that causes a computer to execute. (6)
[Appendix 10]
The receiving device further includes a display unit for displaying the video data or audio data,
Further causing the computer to execute a procedure for simultaneously reproducing video data or audio data related to a plurality of different TV programs stored in the storage unit on the display unit,
The program according to claim 9, wherein the storing procedure includes storing the reproduction time of video data or audio data related to the plurality of television programs in the storage unit.
[Appendix 11]
In the deletion procedure, the video or audio data of a portion corresponding to the playback time is recorded when the video data or audio data is not viewed or played back or when recording is not performed, or when the receiver is charged, or at a specified time. The program according to appendix 9 or 10, which includes deleting from the storage unit.
[Appendix 12]
The deletion procedure includes deleting a part of video or audio data corresponding to the reproduction time from the storage unit at the end of reproduction of the video data or audio data stored in the storage unit. The program according to appendix 9 or 10.

DESCRIPTION OF SYMBOLS 5 Electric power feeder 10 Receiving device 31 Memory | storage part 33 Communication part 35 Audio | voice output part 36 External storage device 37 Image display part 38 Input part 39 Power supply part 40 Arithmetic processor 41 DSP
42 Memory controller 43 RTC
44 Processing Unit 45 Audio Output I / F Unit 46 Image Output I / F Unit 47 Key Scan Unit 48 Communication I / F Unit

Claims (6)

A storage unit for storing video data or audio data received from the outside;
The reproduction time of the video data or audio data stored in the storage unit is stored in the storage unit, the reproduced video data or audio data is determined based on the reproduction time, and the reproduced video data Or a processing unit for deleting audio data from the storage unit;
A receiving apparatus comprising: The receiving device further includes a display unit for displaying the video data or audio data,
The processing unit further reproduces video data or audio data related to a plurality of different TV programs stored in the storage unit simultaneously on the display unit,
The receiving apparatus according to claim 1, wherein the reproduction time is stored in the storage unit is a reproduction time of video data or audio data related to the plurality of television programs.   The deletion of the reproduced video data or audio data is a portion corresponding to the reproduction time when the video data or audio data is not viewed or reproduced or recorded, or when the receiving device is charged or at a specified time. The receiving apparatus according to claim 1, wherein the video data or the audio data is deleted from the storage unit.   In the deletion of the reproduced video data or audio data, at the end of the reproduction of the video data or audio data stored in the storage unit, a part of the video data or audio data corresponding to the reproduction time is deleted from the storage unit. The receiving apparatus according to claim 1, wherein: A data management method in a receiving device,
The processing unit of the receiving device stores video data or audio data received from the outside in the storage unit of the receiving device;
The processing unit of the receiving device stores in the storage unit a reproduction time due to reproduction of video data or audio data stored in the storage unit;
The processing unit of the receiving device determines the reproduced video data or audio data based on the reproduction time, and deletes the reproduced video data or audio data from the storage unit;
A method characterized by comprising: A program for data management in a receiving device,
The processing unit of the receiving device stores video data or audio data received from the outside in the storage unit of the receiving device;
A procedure in which the processing unit of the receiving device stores in the storage unit a reproduction time due to reproduction of video data or audio data stored in the storage unit;
Determining the reproduced video data or audio data based on the reproduction time, and deleting the reproduced video data or audio data from the storage unit;
A program that causes a computer to execute.

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