JP2009246439A - Program recording control device and program recording control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a program recording control device capable of securing that there is no missing in program data to be recorded, even if changeover of program is performed during recording of the program data, and to provide a program recording control method. <P>SOLUTION: A broadcasting receiving apparatus 11 comprises a tuner, a program file generating means, a recording buffer, and a file generation control means. The program file generating means generates a first program file using program data of a first program and generates a second program file using program data of a second program, when the current program is changed from the first program to the second program during recording of program data. The storage capacity is secured for the recording buffer, so that a read-out point might be held from the end of generation of the first program file to the start of generation of the second program file. The file generation control means controls to read out program data from the read-out point while it controls to write program data to the recording buffer, and it controls to generate the first program and the second program, using the read-out program data. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a program recording control apparatus and a program recording control method for recording program data constituting programs such as terrestrial broadcasting and satellite broadcasting.

  2. Description of the Related Art Conventionally, there is known a program recording apparatus that records a program such as a terrestrial broadcast and a television broadcast such as a satellite broadcast. In recent years, program recording apparatuses that receive digital broadcast broadcast waves in addition to conventional analog broadcasts and record program data extracted from the received broadcast waves have become widespread.

Conventionally, when a program recording device records program data, a recording medium such as a hard disk device is used. When data is recorded on a disk as in a hard disk device, data that needs to be read continuously during reproduction is recorded at discrete positions on the disk, and data reproduction may be interrupted. Therefore, a technique is known in which seamless reproduction is realized by prefetching data extracted from reproduction data based on the seamless reproduction failure estimated time information and storing the data in a buffer (see, for example, Patent Document 1).
JP 2005-332507 A

  By the way, there is a case where program switching occurs while the program recording device is recording program data on a recording means such as a hard disk device, the previous program being broadcast ends, and the next program may start. In such a case, the attributes of the program data of the previous program and the program data of the subsequent program (for example, the number of times that the program can be copied) may be different. It may be recorded as a file.

  However, if you do so, either the last part of the program data of the previous program or the start part of the program data of the subsequent program is lost due to file creation processing, and the program is played back using the recorded program data. However, there was a problem that video and audio were missing.

  Accordingly, the present invention has been made to solve the above-described problems, and is a program recording for recording a program so that the recorded program data is not lost even if the program is switched during the recording of the program data. It is an object of the present invention to provide a control device and a program recording control method.

  In order to solve the above-described problems, the present invention provides a tuner that receives a broadcast signal, and a program in which the tuner receives a broadcast signal during recording of program data obtained from the broadcast signal received by the tuner from the first program. When the program is changed to the second program, the first program file recorded in the recording means is generated using the program data of the first program, and the second program file is generated using the program data of the second program. The read pointer indicating the read start position is held until the program file generating means for generating the program file and the program file generating means generate the first program file and start generating the second program file. The program buffer is read from the read pointer while writing the program data to the recording buffer, and the program data is read from the read buffer. Program file generating means Te is characterized the program recording control apparatus and a file generation control means for generating a first program files and the second program file for.

  The present invention is also a program recording control method applied to a broadcast receiving apparatus having a tuner for receiving a broadcast signal, wherein the tuner receives a broadcast signal during recording of program data obtained from the broadcast signal received by the tuner. When the program receiving the program changes from the first program to the second program, the first program file recorded in the recording means is generated using the program data of the first program, and the second program A program file is generated for generating a second program file using program data of the program, and after the first program file is generated by the program file generation, reading is started until the generation of the second program file is started. A recording buffer having a sufficient recording capacity is provided so that a reading pointer indicating the position is held, and program data is written from the reading pointer while writing program data to the recording buffer. It reads the data, provides a program recording control method for controlling so as to generate a first program files and the second program file in the program file generated using the read program data.

  As described above in detail, according to the present invention, even if a program is switched during recording of program data, a program recording control device and a program for recording a program so that the recorded program data is not lost. A recording control method is obtained.

  Hereinafter, embodiments of the present invention will be described. In addition, the same code | symbol is used for the same element and the overlapping description is abbreviate | omitted.

  FIG. 1 is a block diagram showing a configuration of a network system 100 including a broadcast receiving device 11 incorporating a program recording control device according to an embodiment of the present invention and a plurality of devices.

  In the network system 100, a broadcast signal of a digital broadcast is received by the broadcast receiving device 11, and an image of the television broadcast is displayed by the broadcast receiving device 11 using program data obtained from the broadcast signal. In the network system 100, the program data obtained from the broadcast signal received by the broadcast receiving device 11 can be recorded by recording it in a recording device such as an external HDD 25 or a built-in HDD 40 described later.

  The broadcast receiving apparatus 11 includes a cabinet 12 and a support base 13 that supports the cabinet 12 upright. The cabinet 12 has a flat panel type liquid crystal display device 14 provided with a liquid crystal display panel. The broadcast receiving apparatus 11 also includes a speaker 15 that outputs sound, an operation unit 16, and a light receiving unit 18 that receives operation information transmitted from the remote controller 17.

  The broadcast receiving device 11 displays an image of a television broadcast program on the liquid crystal display device 14 as a display means for displaying a video, and also displays a video using a video signal input from the STB 35.

  The broadcast receiving device 11 is detachably attachable to a memory card 19 (see FIG. 2) such as an SD (Secure Digital) memory card or a USB memory, and can record and reproduce programs and photographs using the memory card 19. To be done.

  The broadcast receiving apparatus 11 includes a first local area network (LAN) terminal 21, a second local area network (LAN) terminal 22, and a high-definition multimedia interface (HDMI) terminal 23.

  These terminals are selected in accordance with an operation performed by the user, and an external device connected to the selected terminal is set as an external device for video display. For example, when the HDMI terminal 23 is selected by an operation performed by the user, the STB 35 is set as an external device for video display.

  The first LAN terminal 21 is used as a LAN-compatible HDD dedicated port. The first LAN terminal 21 is used for recording and reproducing information by Ethernet (registered trademark) with respect to a LAN-compatible HDD 25 as a connected NAS (Network Attached Storage).

  The second LAN terminal 22 is used as a general LAN-compatible port using Ethernet. The second LAN terminal 22 is connected to a LAN-compatible external HDD 27 or the like via a hub 26, and is used for information transmission with these devices.

  The HDMI terminal 23 is a terminal for inputting a high-definition digital video signal and digital audio signal from an external device in accordance with the HDMI standard. An STB 35 is connected to the HDMI terminal 23 as an external device.

  The HDMI terminal 23 inputs / outputs digital video signals and digital audio signals to / from an external device via a data line 37 a of the HDMI cable 37. Further, the HDMI terminal 23 is used for data (“Power On” command, ““ Power on / off control of the external device by the broadcast receiving device 11) and various control functions in the broadcast receiving device 11 and the external device ” Each command such as “Power off” command is input / output via the CEC line 37b.

  The STB 35 connects to a cable television network (not shown) to receive a program, or connects to a telephone line (not shown) to connect to the Internet. The STB 35 outputs the video signal to the broadcast receiving device 11 via the HDMI cable 37.

  Next, the internal configuration of the broadcast receiving apparatus 11 will be described with reference to FIG. FIG. 2 is a block diagram showing a main configuration inside the broadcast receiving apparatus 11.

  The broadcast receiving apparatus 11 has input terminals 44 and 49, tuners 45, 50 and 52, and a PSK (Phase Shift Keying) demodulator 46. The broadcast receiving apparatus 11 also includes a signal processing unit 47, an OFDM (Orthogonal Frequency Division Multiplexing) demodulator 51, an analog demodulator 53, a graphic processing unit 54, an audio processing unit 55, an OSD signal generation unit 57, and a video processing unit 58. is doing.

  A satellite digital broadcast signal captured by the BS / CS digital broadcast receiving antenna 43 is input to the input terminal 44. The satellite digital broadcast signal is supplied from the input terminal 44 to the tuner 45. The tuner 45 is a satellite digital broadcast tuner, and selects and receives a broadcast signal of a desired channel from the supplied satellite digital broadcast signal.

  The broadcast signal selected by the tuner 45 is supplied to the PSK demodulator 46. The PSK demodulator 46 demodulates digital video signals and audio signals, generates program data, and outputs the program data to the signal processing unit 47.

  A digital terrestrial broadcast signal captured by the terrestrial broadcast receiving antenna 48 is input to the input terminal 49. The terrestrial digital broadcast signal is supplied from the input terminal 49 to the tuner 50. The tuner 50 is a tuner for terrestrial digital broadcasting, and selects and receives a broadcast signal of a desired channel from the supplied terrestrial digital broadcast signal.

  The broadcast signal selected by the tuner 50 is supplied to the OFDM demodulator 51. The OFDM demodulator 51 performs demodulation processing, generates program data including video data, audio data, character data, and the like, and outputs the program data to the signal processing unit 47.

  In addition, the terrestrial analog broadcast signal captured by the terrestrial broadcast receiving antenna 48 is input to the input terminal 49. The terrestrial analog broadcast signal is supplied from the input terminal 49 to the tuner 52. The tuner 52 is a terrestrial analog broadcast tuner, and selects and receives a broadcast signal of a desired channel from the supplied terrestrial analog broadcast signal.

  The broadcast signal selected by the tuner 52 is supplied to the analog demodulator 53. The analog demodulator 53 demodulates analog video signals and audio signals and outputs them to the signal processing unit 47.

  The signal processing unit 47 selectively performs predetermined digital signal processing on the digital video signal and audio signal respectively supplied from the PSK demodulator 46 and the OFDM demodulator 51, and the graphic processing unit 54 and the audio processing unit To 55.

  The signal processing unit 47 is connected to a plurality (four in the illustrated case) of input terminals 56a, 56b, 56c, and 56d. These input terminals 56a to 56d can input analog video signals and audio signals from a DVD recorder 29 or the like as an external device.

  The signal processing unit 47 digitizes analog video signals and audio signals respectively supplied from the analog demodulator 53 and the input terminals 56a to 56d. Further, the signal processing unit 47 performs predetermined digital signal processing on the digitized video signal and audio signal, and then outputs them to the graphic processing unit 54 and the audio processing unit 55.

  The graphic processing unit 54 superimposes and outputs the OSD signal generated by the OSD (On Screen Display) signal generation unit 57 on the digital video signal supplied from the signal processing unit 47. The graphic processing unit 54 selectively outputs the output video signal of the signal processing unit 47 and the OSD signal output from the OSD signal generation unit 57, and combines both outputs so as to constitute half of the screen. Both output and output.

  The digital video signal output from the graphic processing unit 54 is supplied to the video processing unit 58. The video processing unit 58 converts the input digital video signal into an analog video signal in a format that can be displayed on the liquid crystal display device 14, and then outputs the analog video signal to the liquid crystal display device 14. In addition, the video processing unit 58 derives an analog video signal to the outside through the output terminal 59a.

  The audio processing unit 55 converts the input digital audio signal into an analog audio signal in a format that can be reproduced by the speaker 15, and then outputs the analog audio signal to the speaker 15. Also, the audio processing unit 55 derives an analog audio signal to the outside through the output terminal 59b.

  The broadcast receiving apparatus 11 includes a control unit 60, a card holder 66, and various interfaces (card I / F 65, communication I / F 68, communication I / F 69, HD II / F 70, HDMI-CECI / F 72, and a built-in HDD 40. is doing.

  The control unit 60 includes a CPU (Central Processing Unit) 61, a ROM (Read Only Memory) 62, a RAM (Random Access Memory) 63, and a nonvolatile memory 64. The control unit 60 comprehensively controls the operation of the broadcast receiving apparatus 11 including the reception operation of the broadcast signal. Further, the control unit 60 receives the operation information from the operation unit 16 or receives the operation information sent from the remote controller 17 via the light receiving unit 18, and sets each unit so that the operation content is reflected. I have control.

  The CPU 61 operates as various means in accordance with a program stored in the ROM 62, while inputting / outputting signals with other components and controlling the operation of the entire broadcast receiving apparatus 11.

  The ROM 62 mainly stores a control program executed by the CPU 61. The RAM 63 provides a work area for the CPU 61. The RAM 63 is provided with a recording buffer 80 described later. The nonvolatile memory 64 stores various setting information and control information.

  The control unit 60 is connected to a card holder 66 into which the memory card 19 can be mounted via a card I / F (Interface) 65. As a result, the control unit 60 can perform information transmission via the memory card 19 attached to the card holder 66 and the card I / F 65.

  The control unit 60 is connected to the first LAN terminal 21 via the communication I / F 68. Accordingly, the control unit 60 can perform information transmission with the LAN-compatible HDD 25 connected to the first LAN terminal 21 via the communication I / F 68.

  The control unit 60 is connected to the second LAN terminal 22 via the communication I / F 69. Thus, the control unit 60 can perform information transmission with each device such as the HDD 27 connected to the second LAN terminal 22 via the communication I / F 69.

  The control unit 60 is connected to the HDMI terminal 23 via the HDMII / F 70 and the HDMI-CECI / F 72. Accordingly, the control unit 60 can perform information transmission via the STB 35 connected to the HDMI terminal 23, the HDMII / F70, and the HDMI-CECI / F72. The control unit 60 also has a function as a program file generation unit that generates a program file using program data and a file generation control unit that records the generated program file in the built-in HDD 40. The built-in HDD 40 records first and second program files f1 and f1 described later, and margin data m1 and m2 described later.

(Explanation of operation contents)
Next, the content of the program file generation operation in the broadcast receiving apparatus 11 having the above configuration will be described. The broadcast receiving apparatus 11 performs recording by generating a program file using program data and recording it in the external HDD 27 or the built-in HDD 40. In the following description, a case where the program file is recorded in the built-in HDD 40 will be described as an example. To do. In this case, in the broadcast receiving apparatus 11, when recording the program data in the HDD 40, the CPU 61 secures an area for recording the program data and allows the data area to be recognized as one unit of reading and writing. Thus, a program file is generated.

  In the broadcast receiving apparatus 11, program data is generated from the broadcast signal selected by the tuner 50 and supplied to the control unit 60. Then, under the control of the CPU 61, a program file is generated from the program data and recorded in the HDD 40.

  When the program data is recorded on the HDD 40 (during recording), the program for which the tuner 50 is receiving the broadcast signal may change. For example, the first program broadcast in the time frame from 9 o'clock to 10 o'clock ends when the time reaches 10 o'clock, and the next program (second program) starts broadcasting from 10 o'clock It is. When the user performs recording, the channel of the program to be recorded, the recording start time, and the recording end time may be designated, but these are not designated, and the recording button of the remote controller 17 is pressed during the program broadcast. In some cases, the program is switched as described above.

  When the CPU 61 detects that there has been a switching in such a case during recording from the detection of the switching time of the program obtained from the EPG or the CCI information of the PMT (Program Map Table), the CPU 61 performs the following operation. .

  The program data of the first program and the program data of the second program may have different data attributes such as a limit on the number of times that the program can be copied. Therefore, the CPU 61 operates as a program file generation unit to divide the program data of the first program and the program data of the second program into program units, and uses the program data of the first program to The first program file f1 is generated, and after the first program file f1 is generated (or during generation), the second program file f2 is generated using the program data of the second program. The generated first and second program files f1 and f2 are recorded in the HDD 40, and serve as a unit for reading program data when the program is reproduced.

  However, after the CPU 61 generates the first program file f1 (or during generation), until the generation of the second program file f2 using the program data of the second program is started, the file processing is performed to some extent. Time (file processing time) is required, and the program data cannot be recorded in the HDD 40. Therefore, the last part of the program data of the first program corresponding to the file processing time or the head part of the program data of the second program is not recorded, and there is a possibility of causing data loss.

  In order to avoid such missing of program data, the broadcast receiving apparatus 11 is provided with a recording buffer 80 in the RAM 63 and is controlled so that the program data is recorded in the HDD 40 through reading and writing of program data to and from the recording buffer 80. .

  Here, the recording buffer 80 is a FIFO memory, and the inside thereof is constituted by a ring buffer as shown in FIG. In the recording buffer 80, a data holding unit 81 is configured in a ring shape, and data is managed by two pointers, a write pointer WP and a read pointer RP. The write pointer WP indicates the next data write start position. When data is written, the pointer position is moved by the written data size (clockwise (clockwise) direction indicated by an arrow in FIG. 3). The read pointer RP indicates the read start position of the next data, and when the data is read, the pointer position is moved by the read data size.

  A data area A1 starting from the read pointer RP and ending with the write pointer WP is an area (effective data area) where program data is written. In the data holding unit 81, the data area A2 starting from the write pointer WP and ending with the read pointer RP is an empty area where no data is written.

  The recording buffer 80 has a recording capacity so that at least the read pointer RP is held after the CPU 61 generates the first program file (or during generation) until the generation of the second program file is started. It is secured. That is, when the CPU 61 generates (or during generation) the first program file f1 and starts generating the second program file f2 as a blank period, the program is at least during this blank period. Even when data is written and the write pointer WP moves, a recording capacity is secured so as not to exceed the read pointer RP.

  When the recording capacity of the recording buffer 80 is ensured as described above, the CPU 61 starts from the read pointer RP when generating the second program file f2 after generating the first program file f1 (or during generation). Even if the program data is read, the written program data can be surely read.

  When recording the program data in the HDD 40, the CPU 61 reads the program data from the read pointer RP while writing the program data from the write pointer WP to the recording buffer 80, and uses the read program data to read the first, Second program files f1 and f2 are generated. By interposing the recording buffer 80, the CPU 61 forms the margin data m1 after the program switching timing tc in the final part of the first program file f1, and sets the margin data m2 before the program switching timing tc as the second program. It is formed at the beginning of the file f2.

  Therefore, the first program file f1 and the second program file f2 have overlapping (overlapping) program data (also referred to as OFFSET) as margin data m1 and m2, and recorded program data. Occurrence of missing is avoided. The data size of the margin data m1 and m2 can be set to, for example, 1 second, but may be longer than 1 second or shorter. The data size of the margin data m1 and m2 may be the same or different. The margin data m1 and m2 may be managed by the number of bytes, or may be managed by the number of packets, the bank unit, or the like.

  On the other hand, when the CPU 61 detects that the program has been switched during recording, the CPU 61 generates the first program file f1 and the second program file f2 as described above, and also operates as margin data recording control means. The data size of the overlapping margin data m1, m2 of the first program file f1 and the second program file f2 is recorded in the HDD 40.

  Further, the CPU 61 performs an operation as an overlap recording control means, and indicates that the first program file f1 and the second program file f2 are overlap files having overlapping portions by the margin data m1 and m2. Overlap recording data is recorded on the HDD 40.

  The CPU 61 has a function as program reproducing means for reading the recorded first program file f1 or second program file f2 from the HDD 40 and reproducing the program.

  When the CPU 61 reads out the first and second program files f1 and f2 from the HDD 40 and displays the video on the liquid crystal display device 14, the program is reproduced together with the first and second program files f1 and f2. When overlap recording data relating to the first and second program files f1 and f2 is recorded on the HDD 40, the data sizes of the margin data m1 and m2 are read from the HDD 40. When the first program is reproduced, the margin data m1 is skipped, and when the second program is reproduced, the margin data m2 is skipped and reproduced.

  Thus, when the first program and the second program broadcast continuously are reproduced, the first program and the second program can be reproduced continuously (seamlessly).

  A recording apparatus such as the HDD 40 or the HDD 27 can read recorded program data and reproduce a program while recording, but cannot record two programs simultaneously while reproducing a high-definition program. Therefore, when recording a program using such an HDD 40 or HDD 27, if the program is switched as described above, the last part of the previously broadcast program or the head part of the later broadcast program is missing. Resulting in.

  However, since the broadcast receiving apparatus 11 is provided with the recording buffer 80 and generates the program file as described above, the program data can be recorded without being lost even if a recording apparatus such as the HDD 40 or the HDD 27 is used. can do. Further, even if the program data is divided into programs, a series of programs can be reproduced continuously.

  In the above embodiment, the broadcast receiving device 11 as a television receiving device including the liquid crystal display device 14 is described as an example of the program recording control device. However, in the present embodiment, a tuner like a DVD recorder is described. The present invention can also be applied to a program recording apparatus that can record and reproduce program data.

  Further, the case where program data is recorded from the broadcast receiving apparatus 11 to the built-in HDD 40 has been described as an example. The present invention can also be applied to the case where program data is recorded in the program.

  In the above embodiment, the broadcast receiving apparatus 11 has the built-in HDD 40. However, the present embodiment does not have the built-in HDD 40, and the broadcast receiving apparatus can record program data in an external HDD. Can also be applied.

  The above description is the description of the embodiment of the present invention, and does not limit the apparatus and method of the present invention, and various modifications can be easily implemented. In addition, an apparatus or method configured by appropriately combining components, functions, features, or method steps in each embodiment is also included in the present invention.

It is a block diagram which shows the structure of the network system comprised by the broadcast receiving apparatus with which the program recording control apparatus which concerns on embodiment of this invention was integrated, and several apparatus. It is a block diagram which shows the main structures inside a broadcast receiver. It is a figure which shows the structure of a video recording buffer. It is a figure which shows the program file and recording buffer which are produced | generated when there is a program switch during recording.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Broadcast receiving apparatus, 27 ... External HDD, 40 ... Built-in HDD, 60 ... Control part, 61 ... CPU, 80 ... Recording buffer, 100 ... Network system, RP ... Read pointer, WP ... Rewrite pointer.

Claims (6)

A tuner for receiving broadcast signals;
Recorded in the recording means when the program for which the tuner is receiving the broadcast signal is changed from the first program to the second program during recording of the program data obtained from the broadcast signal received by the tuner. Generating a first program file using program data of the first program, and generating a second program file using program data of the second program;
The recording capacity is secured so that the reading pointer indicating the reading start position is held until the program file generating means generates the first program file and starts generating the second program file. Recorded recording buffer, and
The program data is read from the read pointer while writing the program data to the recording buffer, and the program file generating means uses the read program data to read the first program file and the second program file. A program recording control device comprising: file generation control means for controlling to generate a program file.   It further comprises an overlap recording control means for causing the recording means to record that the first program file and the second program file are overlap files having overlapping portions of the program data. The program recording control apparatus according to claim 1.   Margin data recording control means for causing the recording means to record the data sizes of the first margin data and the second margin data that constitute overlapping portions of the program data in the first program file and the second program file. 3. The program recording control apparatus according to claim 2, further comprising: Video display means for displaying video;
4. The program recording control apparatus according to claim 3, further comprising: a program reproducing unit that reads out the first program file or the second program file from the recording unit and displays the video on the video display unit.   When it is recorded in the recording means that the first program file and the second program file are the overlap files, the program reproduction means is configured to use the first margin data or the second margin. 5. The program recording control apparatus according to claim 4, further comprising reproduction control means for controlling data to be skipped. A program recording control method applied to a broadcast receiving device having a tuner for receiving a broadcast signal,
Recorded in the recording means when the program for which the tuner is receiving the broadcast signal is changed from the first program to the second program during recording of the program data obtained from the broadcast signal received by the tuner. Generating a first program file using program data of the first program, and generating a second program file using program data of the second program,
A recording capacity is secured so that the read pointer indicating the read start position is held until the first program file is generated by the program file generation and the generation of the second program file is started. Provided a recording buffer,
The program data is read from the read pointer while writing the program data to the recording buffer, and the first program file and the second program are generated by the program file generation using the read program data. A program recording control method comprising controlling to generate a file.

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