WO2021093662A1 - 接收装置、压缩装置及非易失性存储介质 - Google Patents

接收装置、压缩装置及非易失性存储介质 Download PDF

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Publication number
WO2021093662A1
WO2021093662A1 PCT/CN2020/126564 CN2020126564W WO2021093662A1 WO 2021093662 A1 WO2021093662 A1 WO 2021093662A1 CN 2020126564 W CN2020126564 W CN 2020126564W WO 2021093662 A1 WO2021093662 A1 WO 2021093662A1
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Prior art keywords
compression
transcoder
program
conversion
recording
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PCT/CN2020/126564
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English (en)
French (fr)
Inventor
北村哲也
渡邊忍
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海信视像科技股份有限公司
东芝视频解决方案株式会社
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Application filed by 海信视像科技股份有限公司, 东芝视频解决方案株式会社 filed Critical 海信视像科技股份有限公司
Priority to CN202080008685.8A priority Critical patent/CN113366830B/zh
Publication of WO2021093662A1 publication Critical patent/WO2021093662A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/765—Interface circuits between an apparatus for recording and another apparatus
    • H04N5/775—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/78—Television signal recording using magnetic recording
    • H04N5/782—Television signal recording using magnetic recording on tape
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/92—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/92—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N5/926—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback by pulse code modulation

Definitions

  • the embodiments of the present application relate to a receiving device, a compression device, and a non-volatile storage medium.
  • receiving devices such as television receivers and BD (Blu-ray Disc) recorders have long-term recording functions that compress and record broadcast program data.
  • the program data recorded by a video recorder or the like is temporarily recorded in a storage device as recorded program data in a form that is not compressed and converted, and then converted (ie, compressed) by a transcoder into a long-term recorded program.
  • Long-term recorded programs are recorded programs that are compressed in such a way that the data capacity is reduced from that of the original recorded program.
  • the transcoder stops operating or becomes unusable after starting the compression conversion of a recorded program to a long-term recorded program.
  • the transcoder becomes unusable at the start of scheduled recording, etc. due to the specifications of a semiconductor device that includes a transcoder and has recording and playback functions.
  • the compression conversion to a long-term recording program is interrupted, the compression conversion to a long-term recording program will be executed again when the transcoder is idle, but the transcoder may sometimes be interrupted again in the middle of the compression conversion. Therefore, there may be a state in which the recorded data scheduled for compression conversion has not been compressed and converted no matter how long it has elapsed.
  • the transcoder used for data compression conversion may become unusable due to the execution of scheduled recording during the compression conversion of recorded data. If this happens again and again, it will be unavailable no matter how long it has elapsed. In such a state as the compression conversion, the compression conversion of the recorded data cannot be performed efficiently.
  • Patent Document 1 Japanese Patent Application Publication No. 08-65616
  • Patent Document 2 Japanese Patent Laid-Open No. 2002-171485
  • the purpose of the embodiments of the present application is to provide a receiving device, a compression device, and a difficult-to-use device that can efficiently perform the compression conversion processing of recorded data and is not prone to compression conversion of the recorded data. Lost storage media.
  • the receiving device of the embodiment of the present application is a receiving device having a transcoder that performs data compression, wherein the receiving device has: a management unit that manages the operation of the transcoder; and an extraction unit that includes image information One or two or more compression candidates are extracted in a predetermined order from a plurality of recorded data including at least one of the sound information; and a determination unit that determines whether the transcoder can perform the extraction
  • the data compression is performed on one or more of the compression candidates selected.
  • FIG. 1 is a block diagram showing the structure of the receiving device of the first embodiment
  • FIG. 2 is a flowchart showing an example of the flow of compression conversion processing for long-term recording in the first embodiment
  • FIG. 3 is a functional block diagram of a compression conversion control program for long-term recording in the first embodiment
  • FIG. 4 is a diagram for explaining an execution example of compression conversion based on long-term recording processing by a transcoder in the first embodiment
  • Fig. 5 is a configuration diagram of the data compression system of the second embodiment.
  • 1...receiving device 11...input unit, 12...recording unit, 13...storage unit, 14...image display panel, 15...interface, 16...TV receiver, 17...compression working memory, 21...control unit, 21b...storage , 22...Playing unit, 22a... Signal detection separation unit, 22b... Decoder, 23... Recording unit, 23a... Transcoder, 41... Management unit, 42... Extraction unit, 43... Judgment unit, 44...
  • Compression conversion unit 51...compressor, 51a...control unit, 51b...transcoder, 51c...storage unit, 51d...communication unit, 52...router, 53...TV receiver, 54...video recorder, 55...music server, 56...smartphone, 57...network equipment, 61...network, 62...motor vehicles, 63...equipment, 64...cloud, 64a...server.
  • FIG. 1 is a block diagram showing the structure of a receiving device according to this embodiment.
  • the receiving device 1 of the present embodiment is configured to be capable of receiving digital television broadcasts and recording programs related to the broadcasts in a storage device.
  • the receiving device 1 is, for example, a video recording device or a television receiver.
  • the recording device is a video recorder equipped with a drive device for a recording medium for recording playback, such as a Blu-ray disc.
  • a television receiver is a television device with a built-in video recorder function. As described later, the receiving device 1 has a transcoder 23a that performs data compression.
  • the receiving device 1 has an input unit 11 for inputting a broadcast signal from an antenna ANT, a broadcasting/recording unit 12, and a storage unit 13.
  • the input unit 11 is connected to the antenna ANT.
  • the input unit 11 has a tuner and receives broadcast signals.
  • the input unit 11 receives, for example, at least one program of terrestrial digital broadcasting, BS (Broadcasting Satellite) digital broadcasting, CS (Communication Satellite) digital broadcasting, and BS/CS4K broadcasting.
  • the input unit 11 has a plurality of tuners, and can receive (ie select channels) a plurality of digital broadcast programs.
  • the input unit 11 may also receive a broadcast signal from a cable for cable television, the Internet, etc., as shown by the two-dot chain line.
  • the output signal of the input unit 11 is supplied to the playback/recording unit 12.
  • the playback/recording unit 12 processes the broadcast signal from the input unit 11.
  • the receiving device 1 is a television receiver, it displays image signals in the form of signals such as LVDS (Low Voltage Differential Signaling) to a liquid crystal panel or the like.
  • the image is output on the image display panel 14.
  • the audio output signal is output to a speaker (not shown) in the form of an analog signal. In FIG. 1, only the image signal output to the image display panel 14 is shown.
  • the image signal is output to a different TV receiver 16 through the HDMI (High-definition Digital Media Interface: registered trademark) interface 15 .
  • the storage unit 13 is built-in or externally.
  • the image display panel 14 is integrated with the receiving device 1, and the storage unit 13 may be built in the television receiver or may be externally installed in the television receiver.
  • the storage unit 13 is a storage device having a large storage capacity such as a hard disk drive device.
  • the user of the receiving device 1 can display the image of the desired program on the image display panel 14 by operating the remote control or the like, record the program currently being watched, make a recording reservation using an electronic program table (EPG), etc., and record the playback in the storage. Part 13 of the video program.
  • EPG electronic program table
  • the playback/recording unit 12 records the program from the input unit 11 in the storage unit 13 in accordance with the user's operation instruction and recording reservation. That is, the recording data recorded in the storage unit 13 is the recorded program data in which the broadcast signal is recorded. The user can set whether to record the program recorded in the storage unit 13 as a long-term recording program.
  • the broadcasting/recording unit 12 includes a control unit 21, a broadcasting unit 22 and a recording unit 23.
  • the control unit 21 has a central processing unit (hereinafter referred to as a CPU) 21a and a memory 21b.
  • the memory 21b includes ROM, RAM, and rewritable nonvolatile memory (flash memory, etc.).
  • Various programs for realizing the overall operation and various functions of the receiving device 1 are stored in the ROM and the rewritable nonvolatile memory.
  • the CPU 21a reads out various programs from the ROM and the rewritable nonvolatile memory and expands them to the RAM for execution.
  • control unit 21 When a command from a remote controller (not shown) or the like is given to the control unit 21, the control unit 21 reads and executes the program corresponding to the command from the ROM or rewritable non-volatile memory, thereby realizing the connection with the command Various functions such as display and recording of corresponding programs.
  • control unit 21 executes programs by having a CPU 21a, thereby realizing various functions of the receiving device 1.
  • control unit 21 may also be implemented by an electronic circuit using FPGA (Field Programmable Gate Array) or the like. It is composed of semiconductor devices such as LSI (Large Scale Integration). In this case, each function of the compression conversion control program CCP described later is realized by an electronic circuit or a semiconductor device.
  • the playback unit 22 is a playback circuit that plays the broadcast signal from the input unit 11.
  • the playback unit 22 includes a signal detection separation unit 22a and a decoder 22b.
  • the signal detection and separation unit 22a separates the broadcast signal of the channel selected and received by the input unit 11 into TS (Transport Stream) (that is, video, audio, and control signals.
  • the decoder 22b is in the control unit 21). Under control, the image signal from the signal detection and separation unit 22a is decoded and output as a digital image signal (video output) in the form of, for example, an LVDS signal to the image display panel 14. As described above, the audio signal is output to a speaker not shown .
  • the recording unit 23 has a transcoder 23a.
  • the transcoder 23a is a signal compressor.
  • the transcoder 23a is used to compress the program data including the image signal and the audio signal under the control of the control unit 21 to convert it into a digital signal with a small data capacity specification.
  • the recording unit 23 has a recording circuit (not shown), and the recording circuit temporarily records the program data in the storage unit 13 in an uncompressed and converted form.
  • the transcoder 23a reads out the program data recorded in the storage unit 13 under the control of the control unit 21, performs compression conversion, and then records the program data in the storage unit 13 again.
  • the program data of the recorded program in the storage unit 13 is input to the decoder 22b and played back.
  • the playback/recording unit 12 is formed as a semiconductor device that is one semiconductor chip of SoC (System-on-a-Chip) in this embodiment.
  • the transcoder 23a uses the compression job memory 17 connected to the playback/recording unit 12 to perform compression conversion processing.
  • the compression job memory 17 is, for example, a DRAM.
  • the transcoder 23a reads out the recorded program designated for long-term recording from the storage unit 13 under the control of the control unit 21, uses the compression job memory 17 to perform compression conversion processing, and converts the compressed recorded program data It is recorded in the storage unit 13.
  • the transcoder 23a is used to perform compression conversion processing.
  • the playback unit 22 may be operating and scheduled for recording due to the function or specifications of the playback/recording unit 12 During execution, etc., there are operational constraints such as unavailability of the transcoder 23a.
  • the transcoder 23a of the present embodiment has a restriction that the compression conversion process for long-term recording cannot be performed while the playback unit 22 is operating and the scheduled recording is being performed.
  • the user can use a remote control or the like to make a recording reservation of a broadcast program, and can specify (ie set) whether to record a recorded program for a long time, including the recording reservation.
  • the recording reservation information is stored in a rewritable nonvolatile memory of the memory 21b, and the control unit 21 records the program based on the recording reservation information stored in the memory 21b.
  • the recording reservation information including the setting information for long-term recording is stored in the rewritable nonvolatile memory of the memory 21b.
  • the program set to be recorded for a long time is temporarily recorded in the storage unit 13 as a recorded program in the storage unit 13 in the format of DR (Direct Recording), for example, as the program data of the image quality when the program is not compressed and converted.
  • the recording program data recorded in the storage unit 13 in the DR format includes compression conversion schedule information indicating that long-term recording is set.
  • the transcoder 23a when the transcoder 23a is idle, the program data of the recording program with compression conversion scheduled information is compressed and converted by the transcoder 23a under the control of the control unit 21. That is, the program data recorded in the storage unit 13 is read out by the transcoder 23a and subjected to compression conversion processing, and then is recorded again in the storage unit 13 as long-term recording data.
  • the recording program for which long-term recording is not set does not include compression conversion schedule information, it is recorded in the storage unit 13 as program data of the same image quality as during broadcasting without compression conversion.
  • the control unit 21 controls the state of the circuits in the playback/recording unit 12 while storing the recording of the program in the storage unit 13 and outputting an image signal to the image display panel 14, thereby displaying or broadcasting the program. Furthermore, it performs the control of processing such as compression conversion for long-term recording of recorded programs.
  • the compression conversion of the recorded program for long-term recording is executed when the transcoder 23a can operate.
  • the control unit 21 determines whether the transcoder 23a can operate (that is, whether it is idle) based on the operation state of the receiving device 1, the operation schedule information, and the recording reservation information.
  • FIG. 2 is a flowchart showing an example of the flow of compression conversion processing for long-term recording.
  • Figure 3 is a functional block diagram of the compression conversion control program CCP for long-term recording.
  • FIG. 4 is a diagram for explaining an example of execution of compression conversion based on long-term recording processing by the transcoder 23a.
  • the long-time recording process of FIG. 2 is a process of the compression conversion control program CCP stored in the ROM or non-volatile memory of the memory 21b, and is executed by the CPU 21a of the control unit 21.
  • the compression conversion control program CCP has a management unit 41, an extraction unit 42, a determination unit 43, and a compression conversion unit 44 as functional units.
  • FIG. 2 shows processing including the functions of the extraction unit 42, the determination unit 43, and the compression conversion unit 44.
  • the process of FIG. 2 is executed when the transcoder 23a is in an operable state in the receiving device 1 and is not in use (that is, when the transcoder 23a is idle).
  • the management unit 41 manages the operation of the transcoder.
  • the management unit 41 determines whether or not the transcoder 23a is idle, in other words, whether it can operate based on the current operating state of the receiving device 1 and the future operation plan. That is, the management unit 41 can manage the operation of the transcoder and confirm that the transcoder 23a can operate.
  • the transcoder 23a is idle, for example, when the power of the receiving device 1 is turned off and no recording reservation is performed, or when the receiving device 1 is in a sleep state and no recording reservation is performed.
  • the transcoder 23a can operate when the power of the receiving device 1 is turned off and no recording reservation is performed, and when the receiving device 1 is in a sleep state and no recording reservation is performed. Therefore, when the power of the receiving device 1 is turned off, the management unit 41 confirms that the transcoder 23a can operate.
  • the transcoder 23a cannot be operated (that is, cannot be used) when the playback unit 22 is operating and when scheduled recording is being performed.
  • the transcoder 23a can operate (that is, idle).
  • the control unit 21 confirms the status of each unit of the receiving device 1, and determines whether the transcoder 23a can operate (that is, whether it is idle) based on the confirmed status.
  • the management unit 41 determines whether the transcoder 23a is free. When it is determined that the transcoder 23a is idle, the control unit 21 executes the processing shown in FIG. 2.
  • control unit 21 determines whether there is a recording program scheduled for compression conversion for long-term recording (hereinafter referred to as a conversion scheduled program) (step (hereinafter abbreviated as S) 1).
  • a conversion scheduled program a recording program scheduled for compression conversion for long-term recording
  • the determination of the presence or absence of the scheduled conversion program is performed based on the presence or absence of the scheduled compression conversion information included in the recording data of each recording program recorded in the storage unit 13.
  • the compressed conversion schedule information may also be stored in the memory 21b of the control unit 21, and the control unit 21 may refer to the compression conversion schedule information of the memory 21b to determine the presence or absence of the scheduled conversion program.
  • SS represents the current waiting queue for the scheduled conversion of the program and the idle status of the transcoder.
  • SS1 in SS represents the list of recorded programs currently recorded in the storage unit 13, which is a recorded list of recorded programs arranged in time order.
  • the recorded program list SS1 is controlled by the control unit 21 according to the number of recorded programs in the storage unit 13. To generate the program data of each recorded program.
  • program A is a one-hour program, which is a program scheduled for conversion.
  • Program B is a 30-minute program, which is a scheduled conversion program.
  • Program C is a one-hour program, and is a recorded program that is not scheduled for compression conversion.
  • Program D is a 2-hour program, which is a scheduled conversion program.
  • Program E is a one-hour program, and is a recorded program that is not scheduled for compression conversion.
  • Program F is a 10-minute program, which is a scheduled conversion program.
  • the conversion scheduled recording program list representing the waiting queue of the scheduled conversion recording program list among the recorded recording programs.
  • the control unit 21 extracts scheduled conversion programs from the recorded program list SS1 to generate a scheduled conversion recorded program list (hereinafter referred to as a scheduled conversion list) SS2 as a waiting queue.
  • the conversion schedule list SS2 is arranged in order of recording time. Here, the scheduled programs A, B, D, and F to be converted are shown.
  • the control section 21 acquires information about the scheduled conversion program (S2).
  • the information of the scheduled conversion list SS2 for example, the information of the recording time is acquired.
  • control unit 21 determines whether there is a recording reservation (S3). Since the recording reservation information is stored in the memory 21b, the control unit 21 determines the presence or absence of recording reservation based on the presence or absence of the program reservation information set by the user.
  • the processing of S1 to S5 corresponds to the extracting unit 42, and from a plurality of recorded data (recorded programs) including at least one of image information and sound information, in a predetermined order (here, according to the time when each recorded data was recorded) To the new order) extract the compressed scheduled recording data scheduled to be compressed (the converted scheduled program) as a compression candidate.
  • the control unit 21 determines whether a recording program is selected from the conversion plan list SS2, that is, whether there is a selected recording program (S6).
  • the control unit 21 determines whether the compression conversion of the nth scheduled conversion program will be completed before the time when the next recording scheduled for the recording starts ( S7).
  • the processing of S7 constitutes the determination unit 43.
  • the determination unit 43 determines whether the operable transcoder 23a can perform the above-mentioned data compression on the extracted compressed scheduled recording data (scheduled conversion program). That is, the determination unit 43 determines whether the extracted compression candidate can be compressed by the transcoder 23a.
  • the control unit 21 obtains the remaining capacity of the storage unit 13, that is, the recordable capacity (S8).
  • the remaining capacity of the storage unit 13 is acquired by reading from a storage area such as the memory 21b in which the remaining capacity is stored by a program that monitors the remaining capacity of the storage unit 13.
  • the control unit 21 determines whether the storage unit 13 has a remaining capacity equal to or greater than the data capacity after the conversion of the n-th scheduled conversion program (S9).
  • the determination of S9 is performed by comparing the data capacity of the n-th scheduled conversion program with the remaining capacity of the storage unit 13.
  • the control unit 21 executes the long-time recording conversion process for the nth scheduled conversion program, that is, the conversion is used.
  • the compression conversion process of the encoder 23a (S10).
  • the recording program with the earliest recording time in the conversion schedule list SS2 is compressed and converted (S10).
  • the extraction unit 42 of S1 to S5 regards the compressed scheduled recording data (scheduled conversion program) as compression candidates
  • the item is extracted, and the determination unit 43 of S7 determines whether the extracted compressed scheduled recording data (scheduled conversion program) can be compressed (compressed conversion) by the transcoder 23a.
  • the determination unit 43 determines whether the transcoder 23a can operate from the transcoder 23a. Data compression is performed on the extracted compression candidates in the time period from the beginning to the execution of the next recording reservation. And, when data compression (compression conversion) can be performed on the compression candidate by the transcoder 23a, compression conversion is performed on the compression candidate (S10).
  • the processing of S10 constitutes the compression conversion unit 44.
  • the compression conversion unit 44 constitutes a compression conversion control unit that controls the transcoder 23a to perform compression conversion on the program to be converted.
  • SS1 is a list of recorded programs currently recorded in the storage unit 13. If the processing of FIG. 2 is executed in the state of the recording program list SS1 of FIG. 4, the conversion schedule list SS2 is generated, and the program A as the conversion schedule program is selected at time t0.
  • the control unit 21 can generate transcoder availability information SS3 based on the recording reservation information.
  • the transcoder idle status information SS3 indicates a time schedule within a predetermined period T (here, 6 hours and 20 minutes) from the current time t0.
  • T a predetermined period
  • the recording of the recording reservation a of the program for 1 hour and 30 minutes is scheduled to start at the time t1 30 minutes later from the current time t0.
  • the transcoder 23a will not be used but will be idle.
  • the transcoder 23a can be used in the compression conversion process for long-term recording.
  • the recording of the recording reservation b of the program for 1 hour is scheduled to start at the time t3 after 20 minutes have passed from the time t2 when the execution of the recording reservation a ends.
  • the transcoder 23a can be used in the compression conversion process for long-term recording within 20 minutes from time t2 to t3.
  • the recording of the recording reservation c of the program for 1 hour is scheduled to start at the time t5 after 2 hours have passed from the time t4 when the execution of the recording reservation b ends.
  • the transcoder 23a can be used in the compression conversion process for long-term recording within 2 hours from time t4 to t5.
  • the control unit 21 determines whether the compression conversion processing of the program A, which is the scheduled conversion program, will be completed before the recording of the next recording reservation a starts (S7 ).
  • the time from the current time t0 to the start time t1 of the scheduled recording of the next recording reservation a is 30 minutes.
  • the compression conversion processing of the program A as the scheduled conversion program takes 1 hour, so it is determined that the scheduled program A is converted
  • the compression conversion will not be completed before the time when the next recording starts (No in S7).
  • the recording of the recording reservation a is executed.
  • the transcoder 23a is idle, so the compression conversion process of FIG. 2 is executed again at the end time t2.
  • time t2 and time t3 The time between time t2 and time t3 is 20 minutes, and the compression conversion process of the program F, which is the scheduled conversion program, takes 10 minutes. Therefore, it is determined that the conversion of the scheduled conversion program F will be completed before the time when the next recording starts (in S7 Medium is yes).
  • the transcoder 23a becomes idle. In this case, after 10 minutes from time t2, the transcoder 23a becomes idle, and the compression conversion process of FIG. 2 can be executed again.
  • the scheduled conversion list SS2 the recorded programs (programs B, F) that have undergone compression conversion are deleted, and the scheduled conversion list SS2 includes program A and program D.
  • the scheduled recording of the program b is executed at time t3 and ends at time t4. If there is no addition of other scheduled conversion programs, etc. at time t4, and there is no addition of recording reservations, when the processing shown in Figure 2 is executed at time t4, it is initially determined whether it can be within the 2 hours from time t4 to time t5. During this period, program A is compressed and converted (S7). Since the program A is a one-hour program, it is determined that the conversion of the scheduled program A will be completed before the time t5 when the next recording starts (YES in S7).
  • the transcoder 23a becomes idle. Thereby, at time t41, which is one hour later from time t4, the transcoder 23a becomes idle, and the process of FIG. 2 can be executed again.
  • the recorded programs (program A, program B, and program F) that have undergone compression conversion are deleted, and the program D is included in the scheduled conversion list SS2.
  • the TS in FIG. 4 includes: a conversion schedule list SS2 of scheduled conversion programs at time t41 after the long-term recording conversion process of program A; and a table indicating the execution status of the compression conversion performed by the transcoder 23a and the idle status thereafter.
  • the TS in FIG. 4 shows that only the recorded program D is waiting for compression conversion processing for long-term recording at time t41.
  • a time schedule is generated for a predetermined period T from the current time each time, and the compression conversion process for long-term recording of program D is from the transcoder 23a idle after time t41 to the next time. It is executed when the time from the start of recording of a recording reservation is more than 2 hours.
  • the compression conversion control program CCP when the transcoder 23a is idle, select a video program that is scheduled to be compressed and converted earlier and can complete the compression conversion before the next time when the transcoder 23a becomes unusable. Video program, to compress and convert.
  • the process of confirming whether the number of recorded programs currently recorded in the storage unit 13 has reached the maximum number of recordings set by the receiving device 1 (the maximum number of programs that can be recorded by the receiving device 1) can also be performed.
  • the number of currently recorded recorded programs reaches the maximum recorded number set by the receiving device 1, a prescribed message is generated and displayed on the image display panel 14, thereby notifying the user that the number of recorded programs exceeds the maximum recorded number.
  • a receiving device that can efficiently perform the compression conversion processing of recorded data and is unlikely to occur in such a state that the compression conversion of recorded data does not occur no matter how long it elapses.
  • a long-term recording program is cited, but the object of compression conversion does not necessarily need to be a long-term recording program.
  • it may be related to long-term recording.
  • the setting of the specified recording program irrelevantly, for example, the recording program with the specified genre, series name and other attributes.
  • the object of compression conversion can be not only the recorded data of the broadcast program, but also the recorded data stored in the designated storage area, and the recorded data stored when the recordable area is below the threshold.
  • Recording data in various forms, such as the recording data recorded by the designated user, are the objects of compression conversion.
  • the scheduled programs for conversion are selected from the recorded programs scheduled for compression conversion in the order of the recording time from the old to the newest. If the selected scheduled programs for conversion can be converted from The codec can operate until the start of the next recording reservation.
  • the transcoder is in the idle time to compress and convert the scheduled conversion program, the conversion scheduled program will be compressed and converted immediately, but it can also be determined that the conversion is in progress.
  • the specified priority Sequence (here, the priority is given to the conversion scheduled program with a long recording time) select a compression candidate for compression conversion.
  • the scheduled conversion program of 10 minutes and the scheduled conversion program of 20 minutes in the 30-minute free time , Preferentially select the 20-minute conversion scheduled program recorded later than the 10-minute conversion scheduled program for compression conversion.
  • the transcoder 23a can perform the compression conversion of the 10-minute conversion scheduled program, then the 10-minute conversion scheduled program compression conversion is performed.
  • the idle time is 30 minutes and there are three programs of 10 minutes of scheduled conversion, 20 minutes of scheduled conversion, and 30 minutes of scheduled conversion in the conversion scheduled list in the order of the recording time from the old to the newest.
  • the 30-minute idle time the 30-minute conversion scheduled program with the longest recording time is preferentially selected for compression conversion.
  • S3 to S7 of FIG. 2 described above a plurality of scheduled conversion programs are extracted, and in S10, a conversion scheduled program with a long recording time is preferentially selected for compression conversion processing.
  • the scheduled conversion programs are also selected in the order of the recording time from the oldest to the newest.
  • the compression conversion unit 44 determines a compression candidate according to the prescribed priority order (here in the order of the length of the recording time) and controls the transcoding The device 23a performs compression conversion on the compression candidate.
  • the transcoder 23a takes as much time as the recording time of the recorded program in the storage unit 13 (that is, the same multiple speed) to perform the compression conversion of the scheduled program.
  • the transcoder 23a can perform compression conversion at a speed faster than the equal speed.
  • the above-mentioned determination of S7 may be performed based on the compression conversion processing time that is not a time double the speed of the recording time.
  • the scheduled programs for conversion are selected from the recorded programs scheduled for compression conversion according to the predetermined order of the recording time from the old to the newest. If the selected conversion scheduled programs If it is a scheduled conversion program that can be compressed and converted in the idle time that is available from the time the transcoder can operate to the start of the next recording reservation, the scheduled conversion program will be compressed and converted immediately. That is, the selection of compression candidates is performed in the order of the recording time from the oldest to the newest, which is a predetermined order.
  • the predetermined order of selection of compression candidates may also be the order of the recording time from the newest to the oldest, the order of the data size of the recorded program (from the largest to the smallest or from the smallest to the largest), and then Other orders are also possible.
  • the first embodiment relates to a receiving device that compresses a recorded program recorded based on a broadcast signal
  • the second embodiment relates to a compression device that compresses data recorded in an external device or the like.
  • the compression device of this embodiment has a transcoder that performs data compression.
  • Fig. 5 is a configuration diagram of the data compression system of the second embodiment.
  • the compression device 51 of the data compression system is installed in the building H.
  • a router 52 is installed in the building H, and the compression device 51, the television receiver 53, the video recorder 54, and the music server 55 are connected via a network including the router 52 so as to be able to communicate with each other.
  • the router 52 has a wireless LAN function and can also communicate with a smartphone 56 and the like.
  • the router 52 is also connected to a network device 57 connected to a network 61 such as the Internet.
  • the compression device 51 includes a control unit 51a, a transcoder 51b, a storage unit 51c, and a communication unit 51d.
  • the control unit 51a, the transcoder 51b, and the storage unit 51c correspond to the control unit 21, the transcoder 23a, and the storage unit 13 of the first embodiment, respectively.
  • the communication unit 51d is a circuit for communicating with the router 52.
  • the control unit 51a uses the router 52 to obtain recording data recorded on the television receiver 53, the video recorder 54, the music server 55, the smart phone 56, etc., and the multiple songs recorded on the music server 55 through communication.
  • the transcoder 51b When the transcoder 51b is idle, it compresses the above-mentioned recorded data and stores it in the storage unit 51c, or transmits it to the television receiver 53, the video recorder 54, and the like.
  • the control unit 51a includes a CPU, a ROM, etc., and the compression conversion control program CCP similar to that of FIG. 2 is stored in the ROM.
  • the compression conversion control program CCP included in the control unit 51a includes a management unit 41, an extraction unit 42, a determination unit 43, and a compression conversion unit 44 as shown in FIG.
  • the management unit 41 of this embodiment manages the operation of the transcoder 51b.
  • the extraction unit 42 of this embodiment extracts one or two or more compression candidates in a predetermined order from a plurality of recorded data including image information or sound information.
  • the judging unit 43 of this embodiment judges whether the extracted one or two or more compression candidates can be data compressed by the operable transcoder 51b.
  • the compression conversion unit 44 as a compression conversion control unit performs compression conversion of the recording data determined by the determination unit 43 to be capable of data compression.
  • control unit 51a can use the transcoder 51b to compress and convert the recorded program data, music data, etc. designated by the user when the transcoder 51b is idle, and store them in the storage unit 51c.
  • the management unit 41 confirms the idle state of the transcoder 51b, and the extraction unit 42 communicates with the television receiver 53, the video recorder 54, and the music server 55 to extract the recorded data scheduled to be compressed and converted.
  • the judging unit 43 judges whether the transcoder 51b can be used for compression conversion processing, and the compression conversion unit 44 compresses and converts the recorded data scheduled for compression conversion and saves it in the storage unit 51c.
  • the encoder 51b can be used to compress the recorded data extracted during the conversion process.
  • the compression device 51 can also obtain image data and sound data recorded in the device 63 mounted on the motor vehicle 62 via the network 61, and transmit the image data and the like after compression conversion processing to the device 63 via the network 61.
  • the compression device 51 may download image information data and the like recorded on the server 64a on the cloud 64 of the Internet, execute the above-mentioned compression conversion process on it, and store it in the storage unit 51c or the server 64a.
  • the image data and the like subjected to the compression conversion process are transmitted from the communication unit 51d to external devices such as the video recorder 54, the device 63, and the server 64a. That is, the compression device 51 has a communication unit 51 d that transmits the recorded data compressed and converted by the compression conversion unit 44 to an external device via the network 52 and the network 61.
  • Modification 1, Modification 2, and Modification 3 of the first embodiment can also be applied to the second embodiment.
  • the compression conversion control program CCP that performs the operations described above is recorded or stored in whole or in part in a portable medium such as a floppy disk, a CD-ROM, or a storage medium such as a hard disk.
  • This program is read by the computer to execute all or part of the operation.
  • the whole or part of the program may be distributed or provided via a communication network.
  • the user can easily implement the receiving device and compression device of the present application by downloading the program via a communication network and installing it on a computer or installing it from a recording medium on the computer.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Television Signal Processing For Recording (AREA)
  • Management Or Editing Of Information On Record Carriers (AREA)

Abstract

本申请提供能够效率良好地进行记录数据的压缩转换处理且不易发生记录数据的压缩转换无论经过多久都未被进行这样的状态的接收装置、压缩装置及非易失性存储介质。实施方式的接收装置（1）具有进行数据压缩的转码器（23a），并且具有管理部（41）、提取部（42）以及判定部（43），其中，管理部（41）管理转码器（23a）的动作，提取部（42）从包含图像信息及声音信息中的至少一方在内的多个记录数据中按照规定的顺序来提取一个或者两个以上的压缩候选项，判定部（43）判定是否能够由可进行动作的转码器（23a）对提取出的一个或者两个以上的压缩候选项进行数据压缩。

Description

接收装置、压缩装置及非易失性存储介质
本申请要求在2019年11月15日提交日本专利局、申请号为2019-207292、发明名称为“接收装置、压缩装置及程序”的日本专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请的实施方式涉及接收装置、压缩装置及非易失性存储介质。
背景技术
对数据进行压缩并记录的技术被广泛利用。例如，电视接收器、BD(蓝光光盘)录像机(Recorder)等接收装置具有对广播的节目数据进行压缩并记录的长时间录像功能。由录像机等录制好的节目数据暂时作为未被压缩转换的形式的录像节目数据而记录在存储装置中，之后由转码器(transcoder)转换(即压缩)为长时间录像节目。长时间录像节目是以使数据容量比原始的录像节目的数据容量减小的方式被压缩的录像节目。
然而，存在转码器在开始录像节目向长时间录像节目的压缩转换之后停止动作或者成为无法使用的状态的情况。例如，存在由于包括转码器且具有录像及播放的功能的半导体装置等的规格而在预约录像开始等时转码器变得无法使用的接收装置。
若向长时间录像节目的压缩转换被中断，则之后在转码器空闲时会再次执行向长时间录像节目的压缩转换，但在该压缩转换的途中，转码器有时也会再次被中断。因此，有时会产生预定进行压缩转换的记录数据无论经过多久都没有被压缩转换这样的状态。
即，用于数据的压缩转换的转码器有时会在记录数据的压缩转换中由于预约录像的执行等而成为无法使用的状态，若这样的情况再三发生，则会产生无论经过多久都未被压缩转换这样的状态，无法效率良好地执行记录数据 的压缩转换。
在先技术文献
专利文献
专利文献1：日本特开平08-65616号公报
专利文献2：日本特开2002-171485号公报
发明内容
因此，本申请的实施方式的目的在于，提供能够效率良好地进行记录数据的压缩转换处理且不易发生记录数据的压缩转换无论经过多久都未被进行这样的状态的接收装置、压缩装置及非易失性存储介质。
本申请的实施方式的接收装置是具有进行数据压缩的转码器的接收装置，其中，所述接收装置具有：管理部，其管理所述转码器的动作；提取部，其从包含图像信息及声音信息中的至少一方在内的多个记录数据中按照规定的顺序提取一个或者两个以上的压缩候选项；以及判定部，其判定是否能够由可进行动作的所述转码器对提取出的一个或者两个以上的所述压缩候选项进行所述数据压缩。
附图说明
图1是表示第一实施方式的接收装置的结构的框图；
图2是表示第一实施方式中的用于长时间录像的压缩转换处理的流程的示例的流程图；
图3是第一实施方式中的用于长时间录像的压缩转换控制程序的功能框图；
图4是用于说明第一实施方式中的由转码器进行的基于长时间录像处理的压缩转换的执行例的图；
图5是第二实施方式的数据压缩系统的结构图。
附图标记说明
1…接收装置，11…输入部，12…录像部，13…存储部，14…图像显示面板，15…接口，16…电视接收器，17…压缩作业存储器，21…控制部，21b…存储器，22…播放部，22a…信号检测分离部，22b…解码器，23…录像部，23a…转码器，41…管理部，42…提取部，43…判定部，44…压缩转换部，51…压缩装置，51a…控制部，51b…转码器，51c…存储部，51d…通信部，52…路由器，53…电视接收器，54…录像机，55…音乐服务器，56…智能手机，57…网络设备，61…网络，62…机动车，63…设备，64…云，64a…服务器。
具体实施方式
以下，参照附图对实施方式进行说明。
(第一实施方式)
(结构)
图1是表示本实施方式的接收装置的结构的框图。本实施方式的接收装置1构成为能够接收数字方式的电视广播并将广播涉及的节目记录于存储装置。接收装置1例如是录像装置、电视接收器。录像装置是搭载有蓝光光盘等录像播放用记录介质的驱动装置的录像机。电视接收器是内置有录像机的功能的电视装置。如后所述，接收装置1具有进行数据压缩的转码器23a。
接收装置1具有供来自天线ANT的广播信号输入的输入部11、播放/录像部12和存储部13。输入部11与天线ANT连接。输入部11具有调谐器并接收广播信号。输入部11接收例如地面数字广播、BS(Broadcasting Satellite)数字广播、CS(Communication Satellite)数字广播、BS/CS4K广播中的至少一个节目。输入部11具有多个调谐器，能够接收(即选台)多个数字广播的节目。
需要说明的是，输入部11也可以如双点划线所示那样接收来自用于有线 电视的电缆、互联网等的广播信号。
输入部11的输出信号向播放/录像部12供给。播放/录像部12对来自输入部11的广播信号进行处理，在接收装置1是电视接收器的情况下，将例如LVDS(Low Voltage Differential Signaling)的信号形式的图像信号向液晶面板等用于显示图像的图像显示面板14输出。声音输出信号以模拟信号形式向未图示的扬声器输出。在图1中，仅示出向图像显示面板14输出的图像信号。
需要说明的是，在接收装置1是录像机的情况下，如单点划线所示那样经由HDMI(High-definition Digital Media Interface：注册商标)接口15向不同体的电视接收器16等输出图像信号。
在接收装置1是录像机的情况下，存储部13内置或者外置。在接收装置1是电视接收器的情况下，图像显示面板14与接收装置1成为一体，存储部13可以内置于电视接收器，也可以外置于电视接收器。
存储部13是硬盘驱动装置等具有大容量的存储容量的存储装置。
接收装置1的用户能够通过操作遥控器等来使所期望的节目的图像显示于图像显示面板14、对收看中的节目进行录像、使用电子节目表(EPG)等进行录像预约、播放记录在存储部13中的录像节目。
播放/录像部12按照用户的操作指示及录像预约，将来自输入部11的节目记录在存储部13中。即，记录在存储部13中的记录数据是记录有广播信号的录像节目数据。用户能够设定是否将记录在存储部13中的节目作为长时间录像节目来记录。
播放/录像部12包括控制部21、播放部22和录像部23。控制部21具有中央处理装置(以下称为CPU)21a和存储器21b。存储器21b包括ROM、RAM及可改写的非易失性存储器(闪存等)。在ROM及可改写的非易失性存储器中存储有用于实现接收装置1的整体的动作及各种功能的各种程序。CPU21a从ROM及可改写的非易失性存储器中读出各种程序并展开到RAM中来执行。
在来自未图示的遥控器等的指令被赋予给控制部21时，控制部21将与 该指令对应的程序从ROM或者可改写的非易失性存储器中读出来执行，由此实现与指令对应的节目的显示、录像等各种功能。
需要说明的是，这里，控制部21通过具有CPU21a来执行程序，由此实现接收装置1的各种功能，但是，控制部21也可以通过使用了FPGA(Field Programmable Gate Array)等的电子电路或者LSI(Large Scale Integration)等半导体装置来构成。这种情况下，通过电子电路或者半导体装置来实现后述的压缩转换控制程序CCP的各功能。
播放部22是播放来自输入部11的广播信号的播放电路。播放部22包括信号检测分离部22a和解码器22b。信号检测分离部22a将输入部11接收并选台的频道的广播信号分离为TS(Transport Stream)(即图像信号(Video)、声音信号(Audio)及控制信号。解码器22b在控制部21的控制下对来自信号检测分离部22a的图像信号进行解码并将其作为数字图像信号(视频输出)以例如LVDS信号形式向图像显示面板14输出。如上所述，声音信号向未图示的扬声器输出。
录像部23具有转码器23a。转码器23a是信号压缩器。转码器23a用于在控制部21的控制下对包含图像信号和声音信号在内的节目数据进行压缩来将其转换为数据容量小的规格的数字信号。
录像部23具有未图示的记录电路，记录电路暂时将节目数据以未被压缩转换的形式记录在存储部13中。转码器23a在控制部21的控制下读出记录在存储部13中的节目数据并进行压缩转换，之后再次记录在存储部13中。存储部13中的录像节目的节目数据向解码器22b输入来播放。
播放/录像部12在本实施方式中作为SoC(System-on-a-Chip)的一个半导体芯片即半导体装置来形成。转码器23a使用与播放/录像部12连接的压缩作业存储器17来执行压缩转换处理。压缩作业存储器17例如是DRAM。由此，转码器23a在控制部21的控制下从存储部13中读出被指定进行长时间录像的录像节目，使用压缩作业存储器17来执行压缩转换处理，并将压缩后的录像节目数据记录在存储部13中。
转码器23a用于进行压缩转换处理，但例如在播放/录像部12形成为一个半导体芯片的情况下，有时会由于播放/录像部12的功能或者规格而在播放部22正在动作、预约录像正在执行等期间产生转码器23a无法使用等动作上的制约。这种情况下，由于这样的转码器23a的动作上的制约，若是在转码器23a正被用于进行长时间录像时执行预约录像的话，则用于长时间录像的压缩转换处理会被中止。本实施方式的转码器23a具有在播放部22正在动作和预约录像正在执行的期间无法进行用于长时间录像的压缩转换处理这样的制约。
如上所述，用户能够使用遥控器等来进行广播节目的录像预约，能够将录像预约的情况也包括在内地指定(即设定)是否对录像节目进行长时间录像。录像预约信息存储在存储器21b的可改写的非易失性存储器中，控制部21基于存储在该存储器21b中的录像预约信息来对节目进行录像。包含长时间录像的设定信息在内的录像预约信息存储在存储器21b的可改写的非易失性存储器中。
被设定进行长时间录像的节目作为未被压缩转换的广播时那样画质的节目数据例如以DR(Direct Recording)形式暂时在存储部13中记录为录像节目。例如以DR形式记录在存储部13中的录像节目数据包含压缩转换预定信息，该压缩转换预定信息表示设定有进行长时间录像。如后所述，在转码器23a空闲时，具有压缩转换预定信息的录像节目的节目数据在控制部21的控制下由转码器23a进行压缩转换。即，记录在存储部13中的节目数据在由转码器23a读出并进行压缩转换处理之后，作为长时间录像数据再次记录在存储部13中。
需要说明的是，由于未设定进行长时间录像的录像节目不包含压缩转换预定信息，因此，作为未被压缩转换的广播时那样画质的节目数据而记录在存储部13中。
控制部21基于来自用户的指示，一边控制播放/录像部12内的各电路的状态一边向存储部13存储节目的录像、向图像显示面板14输出图像信号，由此进行节目的显示或者播放、进而进行录像节目的用于长时间录像的压缩 转换等处理的控制。录像节目的用于长时间录像的压缩转换在转码器23a能够进行动作时执行。
控制部21基于接收装置1的动作状态、动作预定信息及录像预约信息来判定转码器23a是否能够进行动作(即是否空闲)。
(作用)
接着，对在接收装置1中执行的用于长时间录像的压缩转换处理进行说明。图2是表示用于长时间录像的压缩转换处理的流程的示例的流程图。图3是用于长时间录像的压缩转换控制程序CCP的功能框图。图4是用于说明由转码器23a进行的基于长时间录像处理的压缩转换的执行例的图。图2的长时间录像处理是保存在存储器21b的ROM或者非易失性存储器中的压缩转换控制程序CCP的处理，由控制部21的CPU21a来执行。
如图3所示，压缩转换控制程序CCP作为功能部具有管理部41、提取部42、判定部43及压缩转换部44。
图2表示包括提取部42、判定部43及压缩转换部44的功能的处理。图2的处理在接收装置1中转码器23a处于能够进行动作的状态且未被使用时(即转码器23a空闲时)执行。
管理部41管理所述转码器的动作。由管理部41基于接收装置1的当前的动作状态及将来的动作预定来判定转码器23a是否空闲，换言之是否能够进行动作。即，管理部41能够管理所述转码器的动作并确认转码器23a能够进行动作。转码器23a空闲时是指例如接收装置1的电源断开而没有执行录像预约时、接收装置1处于睡眠状态而没有执行录像预约时。通常，在接收装置1的电源断开而没有执行录像预约时及接收装置1处于睡眠状态而没有执行录像预约时，转码器23a能够进行动作。因而，在接收装置1的电源断开时，管理部41确认转码器23a能够进行动作。
如上所述，在本实施方式中，由于播放/录像部12的规格而使转码器23a在播放部22正进行动作时及预约录像正执行时无法进行动作(即无法使用)，但是，在接收装置1的电源断开而没有执行录像预约时、接收装置1处于睡 眠状态而没有执行录像预约时等情况下，转码器23a能够进行动作(即空闲)。
控制部21确认接收装置1的各部的状态，基于该确认出的状态来判定转码器23a是否能够进行动作(即是否空闲)。由管理部41来判定转码器23a是否空闲。在判定为转码器23a空闲时，控制部21执行图2所示的处理。
以下，参照图2来说明提取部42、判定部43及压缩转换部44的处理。
首先，控制部21判定是否存在预定进行用于长时间录像的压缩转换的录像节目(以下称为转换预定节目)(步骤(以下简写为S)1)。转换预定节目的有无的判定基于记录在存储部13中的各录像节目的记录数据所包含的压缩转换预定信息的有无来进行。
需要说明的是，压缩转换预定信息也可以存储于控制部21的存储器21b，控制部21也可以参照该存储器21b的压缩转换预定信息来判定转换预定节目的有无。
在图4中，SS表示当前的转换预定节目的等待队列和转码器的空闲状况。SS中的SS1表示当前在存储部13中已经录完的录像节目列表，是录制好的按时刻顺序排列的录像节目列表，该录像节目列表SS1由控制部21根据记录在存储部13中的多个录像节目的节目数据来生成。
如录像节目列表SS1所示，节目A是1小时的节目，是转换预定节目。节目B是30分钟的节目，是转换预定节目。节目C是1小时的节目，是没有预定进行压缩转换的录像节目。节目D是2小时的节目，是转换预定节目。节目E是1小时的节目，是没有预定进行压缩转换的录像节目。节目F是10分钟的节目，是转换预定节目。
SS中的SS2是表示录完的录像节目中的转换预定节目的录像节目列表的等待队列的转换预定录像节目列表。控制部21从录像节目列表SS1中提取转换预定节目来生成作为等待队列的转换预定录像节目列表(以下，称为转换预定列表)SS2。转换预定列表SS2按录像时刻顺序排列。这里，示出转换预定节目A、B、D、F。
由此，在图4的示例的情况下，在S1中判定在从录像节目列表SS1生成 的转换预定列表SS2中是否存在转换预定节目。
在不存在用于长时间录像的转换预定节目时(在S1中为否)，处理结束。
在存在用于长时间录像的转换预定节目时(在S1中为是)，控制部21获取转换预定节目的信息(S2)。这里，获取转换预定列表SS2的信息、例如录像时间的信息。
在S2之后，控制部21判定是否存在录像预约(S3)。由于录像预约信息保存在存储器21b中，因此控制部21基于由用户设定的节目预约信息的有无来判定录像预约的有无。
在存在录像预约时(在S3中为是)，控制部21执行n＝n+1(S4)。需要说明的是，n为整数，在开始执行图2的处理时，n被设定为0。
在S4之后，控制部21选择从转换预定列表SS2中选出的第n个预定进行压缩转换的录像节目(S5)。最初，选择n＝1的录像节目、即转换预定列表SS2中最早录制好的录像节目。S1～S5的处理与提取部42对应，从包含图像信息及声音信息中的至少一方在内的多个记录数据(录像节目)中按照规定的顺序(这里，按照各记录数据被记录的时刻旧到新的顺序)将预定进行压缩的压缩预定记录数据(转换预定节目)作为压缩候选项而提取出来。
控制部21判定是否从转换预定列表SS2中选择了录像节目，即判定是否存在选择录像节目(S6)。在图2的转换预定列表SS2的情况下，在n＝1时选择节目A，并且判定为存在选择录像节目(在S6中为是)。
需要说明的是，在选择了转换预定列表SS2中的最后的(最新的)录像节目之后，判定为没有从转换预定列表SS2中选择的录像节目(在S6中为否)，结束处理。
在存在从转换预定列表SS2中选择的录像节目时(在S6中为是)，控制部21判定第n个转换预定节目的压缩转换是否会在录像预约的下一次的录像开始的时刻之前完成(S7)。S7的处理构成判定部43。由此，判定部43判定是否能由可进行动作的转码器23a对提取出的压缩预定记录数据(转换预定节目)进行上述数据压缩。即，判定部43判定是否能由转码器23a对提取出 的压缩候选项进行数据压缩。
在第n个转换预定节目的压缩转换不会在下一次的录像开始的时刻之前完成时(在S7中为否)，处理返回到S4。在S4中，将n增加1。在S5中，选择第二早录制好的录像节目，控制部21判定第二个转换预定节目的压缩转换是否会在下一次的录像开始的时刻之前完成(S7)。以下，控制部21同样地按照录像的时刻旧到新的顺序来选择录像节目，并且判定该选择出的转换预定节目的压缩转换是否会在下一次的录像开始的时刻之前完成。
在第n个转换预定节目的压缩转换会在下一次的录像开始的时刻之前完成时(在S7中为是)，控制部21获取存储部13的剩余容量、即能记录的容量(S8)。存储部13的剩余容量通过如下方式来获取：从借助对存储部13的剩余容量进行监视的程序来存储了该剩余容量的存储器21b等存储区域中读出。
另外，在S3中判定为没有录像预约时(在S3中为否)，处理跳到S8。
控制部21判定存储部13是否具有第n个转换预定节目转换后的数据容量以上的剩余容量(S9)。S9的判定通过对第n个转换预定节目的数据容量与存储部13的剩余容量进行比较来进行。
在存储部13具有第n个转换预定节目转换后的数据容量以上的剩余容量时(在S9中为是)，控制部21针对第n个转换预定节目执行长时间录像转换处理、即使用了转码器23a的压缩转换处理(S10)。
在S3中判定为没有录像预约时，对转换预定列表SS2中录像时刻最早的录像节目进行压缩转换(S10)。如上所述那样，基于动作由管理部41管理的转码器23a的动作，在转码器23a能够进行动作时，S1～S5的提取部42将压缩预定记录数据(转换预定节目)作为压缩候选项提取出来，S7的判定部43判定是否能够由转码器23a对提取出的压缩预定记录数据(转换预定节目)进行数据压缩(压缩转换)。
在上述的实施方式中，基于由管理部41管理的转码器23a的动作，在转码器23a能够进行动作时，判定部43判定是否能够由转码器23a在从转码器 能够进行动作开始到下一个录像预约的执行开始为止的时段内对提取出的压缩候选项进行数据压缩。并且，在能够由转码器23a对压缩候选项进行数据压缩(压缩转换)时，针对该压缩候选项执行压缩转换(S10)。
在长时间录像转换结束时，处理返回到S1。S10的处理构成压缩转换部44。压缩转换部44构成压缩转换控制部，该压缩转换控制部控制转码器23a来对转换预定节目进行压缩转换。
使用图4的示例来说明以上的处理。如上所述，SS1是当前在存储部13中已经录完的录像节目列表。若在图4的录像节目列表SS1的状态下执行图2的处理，则生成转换预定列表SS2，在时刻t0下选择作为转换预定节目的节目A。
此时，控制部21能够根据录像预约信息来生成转码器空闲状况信息SS3。转码器空闲状况信息SS3表示从当前时刻t0起的规定期间T(这里为6小时20分钟)内的时间计划表。根据转码器空闲状况信息SS3，在从当前时刻t0起30分钟后的时刻t1下预定要开始1小时30分钟的节目的录像预约a的录像。由此，在从当前时刻t0起的30分钟内，转码器23a不会被使用而是空闲的。换言之，在从当前时刻t0起的30分钟内，能够将转码器23a在用于长时间录像的压缩转换处理中使用。
另外，根据转码器空闲状况信息SS3，在从录像预约a的执行结束的时刻t2起经过20分钟后的时刻t3下预定要开始1小时的节目的录像预约b的录像。由此，在从时刻t2起到t3为止的20分钟内，能够将转码器23a在用于长时间录像的压缩转换处理中使用。
进而，根据转码器空闲状况信息SS3，在从录像预约b的执行结束的时刻t4起经过2小时后的时刻t5下预定要开始1小时的节目的录像预约c的录像。由此，在从时刻t4起到t5为止的2小时内，能够将转码器23a在用于长时间录像的压缩转换处理中使用。
在图4中，由于存在下一个录像预约a(在S3中为是)，因此控制部21判定作为转换预定节目的节目A的压缩转换处理是否会在下一个录像预约a 的录像开始之前完成(S7)。从当前时刻t0起到下一个录像预约a的预约录像的开始时刻t1为止的时间是30分钟，作为转换预定节目的节目A的压缩转换处理要花费1小时，因此，判定为转换预定节目A的压缩转换不会在下一次的录像开始的时刻之前完成(在S7中为否)。然后，在S4中执行n＝n+1，判定针对作为下一个转换预定节目的节目B进行的压缩转换处理是否会完成以便下一个录像预约a能开始(S7)。
时刻t0与时刻t1之间是30分钟，作为转换预定节目的节目B的压缩转换处理要花费30分钟，因此，判定为转换预定节目B的转换会在下一次的录像开始的时刻之前完成(在S7中为是)。
然后，在进行存储部13的剩余容量确认之后，执行针对节目B的长时间录像转换(S10)。
在节目B的用于长时间录像的压缩转换结束之后，执行录像预约a的录像。在录像预约a的录像的执行结束时，转码器23a空闲，因此在其结束时刻t2下再次执行图2的压缩转换处理。
若是在时刻t2下没有其他的转换预定节目的追加等，并且也没有录像预约的追加，则在时刻t2下执行图2的处理时，最初判断是否能够在从时刻t2到时刻t3的20分钟的期间内进行节目A的压缩转换(S6)。由于节目A是1小时的节目，因此判定为转换预定节目A的转换不会在下一次的录像开始的时刻t3之前完成(在S7中为否)。然后，在S4中执行n＝n+1，判定针对作为下一个转换预定节目的节目D进行的压缩转换处理是否会在下一个录像预约b开始之前完成(S7)。
时刻t2与时刻t3之间是20分钟，作为转换预定节目的节目D的压缩转换处理要花费2小时，因此，判定为转换预定节目D的转换不会在下一次的录像开始的时刻t3之前完成(在S7中为否)。然后，在S4中执行n＝n+1，判定针对作为下一个转换预定节目的节目F进行的压缩转换处理是否会在下一个录像预约b开始之前完成(S7)。
时刻t2与时刻t3之间是20分钟，作为转换预定节目的节目F的压缩转 换处理要花费10分钟，因此，判定为转换预定节目F的转换会在下一次的录像开始的时刻之前完成(在S7中为是)。
然后，在进行存储部13的剩余容量确认之后，针对节目F执行长时间录像转换(S10)。
若在节目F的用于长时间录像的压缩转换结束之后没有其他的转换预定节目的追加等，并且也没有录像预约的追加，则转码器23a成为空闲的状态。这种情况下，在从时刻t2起10分钟后，转码器23a成为空闲的状态，能再次执行图2的压缩转换处理。
此时，在转换预定列表SS2中，删除进行过压缩转换的录像节目(节目B、F)，在转换预定列表SS2中包括节目A和节目D。
然而，从时刻t2的10分钟后起到下一个录像预约b的录像开始为止仅有10分钟，在转换预定列表SS2中包括的是节目A和节目D，因此，到时刻t3为止不执行压缩转换处理。
之后，在时刻t3下执行节目b的预约录像，在时刻t4下结束。若在时刻t4下没有其他的转换预定节目的追加等，并且也没有录像预约的追加，则在时刻t4下执行图2的处理时，最初判断是否能够在从时刻t4到时刻t5的2小时的期间内进行节目A的压缩转换(S7)。由于节目A是1小时的节目，因此，判定为转换预定节目A的转换会在下一次的录像开始的时刻t5之前完成(在S7中为是)。
然后，在进行存储部13的剩余容量确认之后，针对节目A执行长时间录像转换(S10)。
若在节目A的用于长时间录像的压缩转换结束之后没有其他的转换预定节目的追加等，并且也没有录像预约的追加，则转码器23a成为空闲的状态。由此，在从时刻t4起1小时后的时刻t41下，转码器23a成为空闲的状态，能再次执行图2的处理。
此时，在转换预定列表SS2中，删除进行过压缩转换的录像节目(节目A、节目B、节目F)，在转换预定列表SS2中包括节目D。
然而，从自时刻t4经过了1小时后的时刻t41起到下一个录像预约c的录像开始为止仅有1小时，因此，此时不执行针对节目D的压缩转换处理。
图4的TS包括：节目A的长时间录像转换处理后的时刻t41下的转换预定节目的转换预定列表SS2；以及表示基于转码器23a进行的压缩转换的执行状况和这之后的空闲状况的转码器空闲状况信息SS3。图4的TS示出在时刻t41下仅录像节目D在等待用于长时间录像的压缩转换处理。
在执行图2的处理时，每次都针对从当前时刻起的规定期间T生成时间计划表，节目D的用于长时间录像的压缩转换处理在时刻t41之后的从转码器23a空闲到下一个录像预约的录像开始为止的时间为2小时以上时执行。
如上所述，根据压缩转换控制程序CCP，在转码器23a空闲时，从预定进行压缩转换的录像节目中选择更早且能够在下一次转码器23a变得无法使用的时刻之前完成压缩转换的录像节目，来进行压缩转换。
需要说明的是，在上述的示例中，为了简化说明，仅确认录像预约的开始时刻，判定转码器23a是否能够在从当前时刻到录像预约的开始时刻为止的期间内进行压缩转换预定节目的压缩转换，但在电视接收器、录像机等中，是将预先决定的所谓的系统维护的时段也一并考虑在内地判定是否能够进行压缩转换预定节目的压缩转换。
另外，需要说明的是，也可以进行确认当前录制在存储部13中的录像节目数量是否达到接收装置1所设定的最大录像数量(接收装置1能够录制的节目的最大数量)的处理，在当前录制的录像节目数量达到接收装置1所设定的最大录像数量时，生成规定的消息来显示于图像显示面板14，从而向用户告知录像节目数量超过了最大录像数量。
如上所述，根据上述的实施方式，能够提供可效率良好地进行记录数据的压缩转换处理且不易发生记录数据的压缩转换无论经过多久都未被进行这样的状态的接收装置。需要说明的是，在上述的实施方式中，作为压缩转换的对象的一例，举出了长时间录像节目，但压缩转换的对象未必需要是长时间录像节目，例如，也可以是与长时间录像的设定无关系地指定的录像节目， 例如是具有指定的体裁、系列名等属性的录像节目。进而，需要说明的是，压缩转换的对象不仅可以是广播的节目的录像数据，还可以将保存在指定的存储区域中的录像数据、在可录像的区域为阈值以下的情况下保存的录像数据、由指定的用户录制的录像数据等各种形式的录像数据作为压缩转换的对象。
接着，对上述的实施方式的变形例进行说明。
(变形例1)
在上述的实施方式中，在转码器23a空闲时，从预定进行压缩转换的录像节目中按照录像时刻旧到新的顺序来选择转换预定节目，若选择出的转换预定节目是能够在从转码器能进行动作到下一个录像预约的开始为止的转码器处于空闲的空闲时间中进行压缩转换的转换预定节目，则立刻对该转换预定节目进行压缩转换，但也可以是，判定在转换预定列表SS2中的转换预定节目中是否存在多个能够在该空闲时间中进行压缩转换的转换预定节目，在存在多个能够在该空闲时间中进行压缩转换的转换预定节目时，按照规定的优先顺位(这里是录像时间长的转换预定节目优先)选择一个压缩候选项来进行压缩转换。
例如，在空闲时间为30分钟且按照录像时刻旧到新的顺序在转换预定列表中存在10分钟的转换预定节目和20分钟的转换预定节目这两个节目时，在该30分钟的空闲时间中，优先选择比10分钟的转换预定节目靠后录制的20分钟的转换预定节目来进行压缩转换。在该20分钟的压缩转换之后，若能够由转码器23a进行10分钟的转换预定节目的压缩转换，则执行10分钟的转换预定节目的压缩转换。
进而，例如，在空闲时间为30分钟且按照录像时刻旧到新的顺序在转换预定列表中存在10分钟的转换预定节目、20分钟的转换预定节目和30分钟的转换预定节目这三个节目时，在该30分钟的空闲时间中，优先选择录像时间最长的30分钟的转换预定节目来进行压缩转换。在上述的图2的S3～S7中，提取出多个转换预定节目，在S10中优先选择录像时间长的转换预定节 目来进行压缩转换处理。这种情况下，在存在多个录像时间长的转换预定节目时，也是按照录像时刻旧到新的顺序来选择转换预定节目。
即，基于由管理部41管理的转码器23a的动作，在转码器23a能够进行动作时，若是判定部43判定为存在多个能够在从转码器能进行动作到广播信号的下一个录像预约的执行开始为止的时段内进行数据压缩的多个压缩候选项，则压缩转换部44按照规定的优先顺位(这里是按照录像时刻长的顺序)来确定一个压缩候选项并控制转码器23a对该压缩候选项进行压缩转换。
根据本变形例1，对按照规定的优先顺位(这里是优先录像时间更长的录像节目)来确定的压缩候选项进行压缩转换，因此，不易发生录像节目的压缩转换无论经过多久都未被进行这样的状态。
(变形例2)
在上述的实施方式中，转码器23a花费与将录像节目记录在存储部13中的录像时间相等的时间(即等倍速)地进行转换预定节目的压缩转换，但存在根据转码器23a的性能而转码器23a能够以比等倍速更快的速度进行压缩转换的情况。这样的情况下，可以基于不是与录像时间等倍速的时间的压缩转换处理时间来进行上述的S7的判定。
(变形例3)
在上述的实施方式中，在转码器23a空闲时，从预定进行压缩转换的录像节目中按照作为规定的顺序的录像时刻旧到新的顺序来选择转换预定节目，若选择出的转换预定节目是能够在从转码器能进行动作到下一个录像预约的开始为止空闲着的空闲时间中进行压缩转换的转换预定节目，则立刻对该转换预定节目进行压缩转换。即，压缩候选项的选择按照作为规定的顺序的录像时刻旧到新的顺序来进行。
然而，作为变形例3，压缩候选项的选择的规定的顺序也可以是录像时刻新到旧的顺序、录像节目的数据大小的顺序(从大到小的顺序或者从小到大的顺序)，进而还可以是其他的顺序。
(第二实施方式)
第一实施方式涉及的是对根据广播信号进行了录制的录像节目进行压缩的接收装置，但第二实施方式涉及的是对记录在外部装置等中的数据进行压缩的压缩装置。本实施方式的压缩装置具有进行数据压缩的转码器。
在本实施方式中，在具有进行数据压缩的转码器的压缩装置中，与上述的第一实施方式同样地在转码器空闲时效率良好地对记录在外部装置等中的数据进行压缩。
图5是第二实施方式的数据压缩系统的结构图。在本实施方式中，数据压缩系统的压缩装置51设置在建筑物H内。在建筑物H内设置有路由器52，经由包括路由器52的网络而将压缩装置51、电视接收器53、录像机54及音乐服务器55连接为能够彼此进行通信。
路由器52具有无线LAN功能，还能够与智能手机56等进行通信。路由器52还与连接到互联网等网络61上的网络设备57连接。
压缩装置51包括控制部51a、转码器51b、存储部51c及通信部51d。控制部51a、转码器51b及存储部51c分别与第一实施方式的控制部21、转码器23a及存储部13对应。
通信部51d是用于与路由器52进行通信的电路。控制部51a借助路由器52通过通信来获取记录在电视接收器53、录像机54、音乐服务器55及智能手机56等中的多个录像节目、记录在音乐服务器55上的多首曲子等记录数据，在转码器51b空闲时，对上述记录数据进行压缩并将其保存于存储部51c，或者向电视接收器53、录像机54等发送。
控制部51a包括CPU、ROM等，在ROM中保存有与图2同样的压缩转换控制程序CCP。控制部51a所具有的压缩转换控制程序CCP如图3所示那样包括管理部41、提取部42、判定部43及压缩转换部44。
本实施方式的管理部41管理转码器51b的动作。本实施方式的提取部42从包含图像信息或者声音信息在内的多个记录数据中按照规定的顺序来提取一个或者两个以上的压缩候选项。本实施方式的判定部43判定是否能够由能进行动作的转码器51b对提取出的一个或者两个以上的压缩候选项进行数据 压缩。作为压缩转换控制部的压缩转换部44进行由判定部43判定为能够进行数据压缩的记录数据的压缩转换。
由此，控制部51a能够在转码器51b空闲时利用转码器51b对用户所指定的录像节目数据、音乐数据等进行压缩转换并将其保存于存储部51c。
在压缩装置51中，由管理部41来确认转码器51b的空闲状态，由提取部42来与电视接收器53、录像机54、音乐服务器55进行通信以提取预定进行压缩转换的记录数据，由判定部43判定转码器51b是否能够使用于压缩转换处理，由压缩转换部44对压缩转换预定的记录数据进行压缩转换并保存于存储部51c，其中，该压缩转换预定的记录数据是在转码器51b能够使用于压缩转换处理时提取出的记录数据。
另外，压缩装置51还能够经由网络61来获取记录于机动车62上搭载的设备63中的图像数据、声音数据，并将进行压缩转换处理后的图像数据等经由网络61向设备63发送。
进而，压缩装置51也可以将记录在互联网的云64上的服务器64a中的图像信息数据等下载下来，对其执行上述的压缩转换处理并保存于存储部51c或者服务器64a。
进行压缩转换处理后的图像数据等从通信部51d向录像机54、设备63、服务器64a等外部设备发送。即，压缩装置51具有通信部51d，该通信部51d将在压缩转换部44中进行压缩转换后的记录数据经由网络52、网络61向外部设备发送。
如上所述，根据上述的实施方式，能够提供可效率良好地进行记录数据的压缩转换处理且不易发生记录数据的压缩转换无论经过多久都未被进行这样的状态的压缩装置。
需要说明的是，第一实施方式的变形例1、变形例2、变形例3也可以适用在第二实施方式中。
如上所述，根据上述的各实施方式及各变形例，能够提供可效率良好地进行记录数据的压缩转换处理且不易发生记录数据的压缩转换无论经过多久 都未被进行这样的状态的接收装置、压缩装置及程序。
需要说明的是，执行以上所说明的动作的压缩转换控制程序CCP作为计算机程序产品而整体或一部分记录或存储在软盘、CD-ROM等便携式介质、硬盘等存储介质中。该程序由计算机读出来执行动作的全部或一部分。或者，可以使该程序的整体或一部分经由通信网络来流通或提供。用户通过经由通信网络下载该程序并安装到计算机上或者从记录介质安装到计算机上，由此能够容易地实现本申请的接收装置及压缩装置。
说明了本申请的几个实施方式，但这些实施方式是作为示例来提示的，并不意在限定申请的范围。这些新的实施方式可以以其他各种各样的形态来实施，可以在不脱离申请的主旨的范围内进行各种省略、置换、变更。这些实施方式及其变形包含在本申请的范围、主旨内，并且包含在权利要求书所记载的发明及与其等同的范围内。

Claims (9)

  1. 一种接收装置，其是具有进行数据压缩的转码器的接收装置，其中，
    所述接收装置具有：
    管理部，其管理所述转码器的动作；
    提取部，其从包含图像信息及声音信息中的至少一方在内的多个记录数据中按照规定的顺序提取一个或者两个以上的压缩候选项；以及
    判定部，其判定是否能够由可进行动作的所述转码器对提取出的一个或者两个以上的所述压缩候选项进行所述数据压缩。
  2. 根据权利要求1所述的接收装置，其中，
    基于由所述管理部管理的所述转码器的动作，在所述转码器能够进行动作时，所述提取部提取一个或者两个以上的所述压缩候选项，所述判定部判定是否能够由所述转码器对提取出的一个或者两个以上的所述压缩候选项进行所述数据压缩。
  3. 根据权利要求1或2所述的接收装置，其中，
    所述记录数据是对广播信号进行记录的录像节目数据，
    基于由所述管理部管理的所述转码器的动作，在所述转码器能够进行动作时，所述判定部判定是否能够由所述转码器在从所述转码器可进行动作到下一个录像预约的执行开始为止的时段内对提取出的一个或者两个以上的所述压缩候选项进行所述数据压缩。
  4. 根据权利要求3所述的接收装置，其中，
    所述接收装置具有压缩转换控制部，所述压缩转换控制部对所述转码器进行控制，
    基于由所述管理部管理的所述转码器的动作，在所述转码器能够进行动作时，若是所述判定部判定为存在能够在从所述转码器可进行动作到下一个录像预约的执行开始为止的时段内进行所述数据压缩的多个压缩候选项，则所述压缩转换控制部控制所述转码器，使得按照规定的优先顺序确定一个压 缩候选项并且进行所述压缩转换。
  5. 根据权利要求1～4中任一项所述的接收装置，其中，
    所述管理部在所述接收装置的电源断开时使所述转码器能够进行动作。
  6. 根据权利要求3～5中任一项所述的接收装置，其中，
    所述接收装置是电视接收器或录像机。
  7. 一种压缩装置，其是具有进行数据压缩的转码器的压缩装置，其中，
    所述压缩装置具有：
    管理部，其管理所述转码器的动作；
    提取部，其从包含图像信息或者声音信息在内的多个记录数据中按照规定的顺序提取一个或者两个以上的预定进行压缩的压缩候选项；
    判定部，其判定是否能够由可进行动作的所述转码器对提取出的一个或者两个以上的所述压缩候选项进行所述数据压缩；以及
    压缩转换控制部，其进行由所述判定部判定为能够进行所述数据压缩的所述压缩候选项的记录数据的压缩转换。
  8. 根据权利要求7所述的压缩装置，其中，
    所述压缩装置具有通信部，所述通信部将在所述压缩转换控制部中进行了所述压缩转换的所述记录数据经由网络向外部设备发送。
  9. 一种计算机可读的非易失性存储介质，所述存储介质存储有程序，其中，
    所述程序用于使计算机执行如下功能：
    对进行数据压缩的转码器的动作进行管理的功能；
    从包含图像信息或者声音信息在内的多个记录数据中，按照规定的顺序提取一个或者两个以上的压缩候选项的功能；以及
    判定是否能够由可进行动作的所述转码器对提取出的一个或者两个以上的所述压缩候选项进行所述数据压缩的功能。
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