JP4152368B2 - Recording system and analog broadcast program recording method - Google Patents

Description

  The present invention relates to a system and method for recording an analog broadcast program.

  Currently, television broadcasting is being shifted from the current analog broadcasting to digital broadcasting. In this transition period, there are two systems, analog broadcasting and digital broadcasting. An analog tuner is required to receive an analog broadcast, and a digital tuner is required to receive a digital broadcast.

  Digital broadcasting has the advantage that it has plenty of program information and can follow in real time even if the broadcast time changes, but it has the disadvantage that the digital tuner is expensive, the recording file size is large, and the copying is limited. is there. On the other hand, analog broadcasting has the advantages of a low-priced tuner, a small recording file size, and loose copy restrictions for personal enjoyment, but it has lower image quality and a smaller amount of information than digital broadcasting. There is a demerit that it cannot cope with a sudden change in broadcast time. Thus, there is a trade-off relationship between digital broadcasting and analog broadcasting in terms of merits and demerits. For this reason, there are still many users who want to record analog broadcast programs with a small recording file size and loose copy restrictions.

Therefore, various apparatuses equipped with a digital tuner and an analog tuner have been proposed. Patent Document 1 is configured so that a digital broadcast that includes a digital tuner and an analog tuner is displayed on the same screen as a digital broadcast that includes program guide information and an analog broadcast that does not include program guide information. Things have been proposed. In this broadcast receiving apparatus, the user can make a program reservation for an analog broadcast program or a digital broadcast program with reference to the displayed program guide.
JP 2003-198961 A

  However, in the conventional apparatus, although the digital tuner is installed, the digital broadcast program information received by the digital tuner is not effectively used for recording the analog broadcast program. For this reason, there is a problem that it is impossible to cope with a sudden change in the broadcast time when an analog broadcast program is reserved for recording. For example, when the broadcast time of a program broadcast before a reserved analog broadcast program is extended, the extended time zone is not recorded.

  An object of the present invention is to solve the above problems, to effectively use digital broadcast program information, and to cope with a sudden change in broadcast time when recording an analog broadcast program. It is to provide a method.

In order to achieve the above object, a recording system of the present invention includes a digital tuner that receives a digital broadcast, at least one analog tuner that receives an analog broadcast, and a recording unit that records the analog broadcast program received by the analog tuner. A control unit for controlling the recording start and the recording end of the analog broadcast program in the recording unit based on a broadcast start timing and a broadcast end timing of the digital broadcast program corresponding to the analog broadcast program received by the digital tuner; A digital program information acquisition unit for acquiring digital broadcast program information including at least program specifying information capable of specifying a currently broadcast program from the digital broadcast reception signal output from the digital tuner; and the analog broadcast Analog broadcast programs broadcast on the digital A program correspondence table indicating a correspondence relationship with a digital broadcast program broadcasted by broadcasting, and the control unit checks a digital broadcast program corresponding to an analog broadcast program to be recorded with reference to the program correspondence table The broadcast start timing and the broadcast end timing are determined based on the program specifying information of the digital broadcast program acquired by the digital program information acquisition unit .

The analog broadcast program recording method of the present invention includes a first step of receiving a digital broadcast channel on which a digital broadcast program corresponding to the analog broadcast program is broadcast before the analog broadcast program to be recorded is broadcast, A second step of starting recording of the analog broadcast program to be recorded by receiving an analog broadcast channel on which the analog broadcast program to be recorded is received, triggered by a broadcast start timing of the digital broadcast program; The third step of ending the recording of the analog broadcast program to be recorded triggered by the broadcast end timing of the program, and the program specifying information for specifying the currently broadcasted program from the received signal of the digital broadcast channel A fourth step and analog received on the analog broadcast channel The digital broadcast program corresponding to the analog broadcast program to be recorded is checked with reference to a program correspondence table showing a correspondence relationship between the transmission program and the digital broadcast program received on the digital broadcast channel, and in the fourth step And a fifth step of determining the broadcast start timing and the broadcast end timing based on the acquired program identification information of the digital broadcast program .

  In the above-described present invention, the above-described problems are solved by utilizing the fact that the same program is broadcast at the same time in each of analog broadcasting and digital broadcasting. Specifically, the recording start and the recording end of the analog broadcast program to be recorded are controlled based on the broadcast start timing and the broadcast end timing of the digital broadcast program that is the same program and is broadcast at the same time. In digital broadcasting, it is possible to identify a program that is currently flowing, so that the broadcast start timing and broadcast end timing of the digital broadcast program can be grasped in real time. Therefore, even if there is a sudden change in the broadcast time of a reserved analog broadcast program, it is possible to grasp the actual broadcast start timing and broadcast end timing of the analog broadcast program from the broadcast start timing and broadcast end timing of the digital broadcast program. it can.

  As described above, according to the present invention, real-time reserved recording of an analog broadcast program is possible, so that even if a sudden change occurs in the broadcast time, the reserved analog broadcast program can be reliably recorded. it can.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing a schematic configuration of a recording system according to an embodiment of the present invention. This recording system is applied to a system capable of recording a program represented by a personal computer or an HDD (Hard Disk Drive) recorder, and has a digital tuner 1, an analog tuner 2, and digital program information. It comprises an acquisition unit 3, an analog program information acquisition unit 4, a program information analysis / control unit 5, a program reservation unit 6, an analog broadcast recording unit 7 and a storage device 8.

  The digital tuner 1 receives digital broadcasting from each broadcasting station through an external digital antenna (not shown). The analog tuner 2 receives an analog broadcast from each broadcast station through an external analog antenna (not shown). The digital broadcast reception signal output from the digital tuner 1 includes information such as video, audio, data, program information (program identification information, program schedule including program title name and detailed information, and the like). The analog broadcast reception signal output from the analog tuner 2 includes information such as video, audio, and program information (a program table including title names and detailed information). The program specifying information is information for specifying a currently flowing program, and by monitoring this information, the start time and end time of the broadcast program can be determined in real time. Digital broadcast program guides usually have a larger amount of information than analog broadcast program guides, and the content of the same program information is often different between the two program guides.

  The digital program information acquisition unit 3 acquires digital broadcast program information from the digital broadcast reception signal from the digital tuner 1. The acquired digital broadcast program information is supplied to the program information analysis / control unit 5. The analog program information acquisition unit 4 supplies an analog broadcast reception signal from the analog tuner 2 to the analog broadcast recording unit 7 and acquires analog broadcast program information from the analog broadcast reception signal. The acquired analog broadcast program information is supplied to the program information analysis / control unit 5.

  The program information analysis / control unit 5 determines the program information based on the digital broadcast program information supplied from the digital program information acquisition unit 3 and the analog broadcast program information supplied from the analog program information acquisition unit 4. In addition to performing analysis, the program reservation unit 6 is supplied with program information necessary for program reservation. In the analysis of the program information, the actual broadcast time (broadcast start time and broadcast end time) of the reserved program in the recording reservation list created by the program reservation unit 6 is used as the program specifying information included in the digital program information. Processing based on the determination, search processing for keywords input by the user through an operation unit (not shown), and the like are performed. Further, the program information analysis / control unit 5 supplies a recording command to the analog broadcast recording unit 7 based on the actual broadcast time of the reserved program. In the supply of the recording command, a recording start command and a recording end command are supplied at the respective timings of the broadcast start time and the broadcast end time of the reserved program determined based on the program specifying information of the digital program information. In response, part or all of the digital program information is supplied.

  The program reservation unit 6 displays a program table relating to an analog broadcast program based on program information (including digital broadcast program information and analog broadcast program information) supplied from the program information analysis / control unit 5 as an external display unit (not shown). The program reservation process is performed in conjunction with the displayed program guide. Specifically, it is possible to designate and input a desired broadcast program in the program guide displayed on the display unit in response to an input operation in the operation unit (not shown). The broadcast program designated and input in the program table is stored in the recording reservation list. The recording reservation list is stored and managed by the program reservation unit 6. Editing the recording reservation list is the same as editing in an existing recorder.

  The analog broadcast recording unit 7 stores reserved broadcast program data in the storage device 8 in accordance with a recording command from the program information analysis / control unit 5 (reserved recording). In addition, the analog broadcast recording unit 7 can also perform normal recording (starting and end of recording are executed according to an input operation by the user). In normal recording and scheduled recording, digital program information supplied from the program information analysis / control unit 5 can be recorded together. As the storage device 8, a large-capacity storage means such as an HDD or a DVD (Digital Video Disk) is used.

  Next, the operation of the recording system of this embodiment will be described. Since processing such as normal recording is the same as that in an existing recorder, a description thereof will be omitted. Here, only processing related to reserved recording, which is a feature of the recording system of the present embodiment, will be described in detail.

  FIG. 2 is a flowchart showing an example of a procedure related to reserved recording. Referring to FIG. 2, the reserved recording is divided into four stages: broadcasting station association (step S10), program association (step S11), program reservation (step S12), and reserved recording processing (step S13). Hereinafter, the operation will be described in each stage.

(1) Broadcast station mapping:
In this broadcast station association, a digital broadcast station and an analog broadcast station are associated with stations that broadcast the same program. FIG. 3 shows an example of correspondence between analog broadcasting stations and digital broadcasting stations. A list of digital broadcast stations (broadcast stations D1 to Dn) and a list of analog broadcast stations (broadcast stations A1 to An) are prepared in advance, and a corresponding broadcast station is determined from these lists to create a broadcast station correspondence table. . In the example of FIG. 3, the broadcasting station D1 and the broadcasting station A3 broadcast the same program, the broadcasting station D2 and the broadcasting station A5 broadcast the same program, and the broadcasting station D3 and the broadcasting station A1 are the same. Broadcast programs. A table showing these correspondences is the broadcast station correspondence table shown in FIG.

  The broadcasting station correspondence table is created manually. Specifically, the program information analysis / control unit 5 displays a broadcast station correspondence table creation screen on the display unit, and on the displayed broadcast station correspondence table creation screen, the user selects a corresponding broadcast station through the operation unit. Register sequentially. In registering a broadcast station, the program information analysis / control unit 5 may display a digital broadcast station list and an analog broadcast station list prepared in advance on another screen. In this case, the user inputs and inputs the corresponding program on the displayed separate screen through the operation unit. Corresponding broadcast stations designated and inputted are sequentially stored in the broadcast station correspondence table. If a text describing a digital broadcast station list and an analog broadcast station list is given, the broadcast station is registered with reference to the text.

  Basically, the association of the broadcasting stations has only to be set once when the recording system is started, and does not need to be set every time the recording system is started. The correspondence contents once set are stored in a storage device (non-volatile memory) (not shown), and the stored setting contents are read out at the next startup.

(2) Program association:
FIG. 4 shows an example of correspondence between a digital broadcast program and an analog broadcast program. In this example, the digital broadcast program DAA broadcast by the broadcast station D1 corresponds to the analog broadcast program AAC broadcast by the broadcast station A3, and the digital broadcast program DAB broadcast by the broadcast station D2 is broadcast by the broadcast station A5. The digital broadcast program DAC broadcasted by the broadcast station D3 corresponds to the analog broadcast program AAA broadcasted by the broadcast station A1. A table corresponding to these correspondences is the program correspondence table shown in FIG.

  The program information analysis / control unit 5 automatically creates a program correspondence table as follows. First, based on the digital broadcast program information supplied from the digital program information acquisition unit 3, a digital broadcast program list in which the digital broadcast program and the digital broadcast station are associated with each other is created, and the analog program information acquisition unit 4 An analog broadcast program list in which analog broadcast programs and analog broadcast stations are associated with each other is created based on the analog broadcast program information supplied from. Next, each digital broadcast program in the digital broadcast program list is compared with each analog broadcast program in the analog broadcast program list (comparison of the title name and detailed information of the program information), and the corresponding programs are sequentially stored in the program correspondence table. . In this way, the program correspondence table shown in FIG. 3 is obtained. In this program correspondence table, the corresponding programs are stored in such a manner that group numbers are sequentially assigned. In the example of FIG. 3, the digital broadcast program DAA and the analog program AAC are stored in the column of the group number “1”, and the digital broadcast program DAB and the analog program AAE are stored in the column of the group number “2”. In the column “3”, the digital broadcast program DAC and the analog program AAA are stored.

  The association of broadcast programs is basically automatically performed every time digital broadcast program information and analog broadcast program information are updated. The program information is updated when the contents of the digital broadcast program information received by the digital tuner 1 and the contents of the analog broadcast program information received by the analog tuner 2 are respectively monitored at regular intervals, and the contents are changed. Judged to have been updated. This program information update determination is made by the program information analysis / control unit 5.

  The association of broadcast programs may be performed manually. In this case, a digital broadcast program list and an analog broadcast program list are displayed, and the user designates and inputs a corresponding program from the displayed list through the operation unit. The corresponding programs that have been designated and input are sequentially stored in a program correspondence table prepared in advance.

(3) Program reservation:
After associating the broadcasting station and the broadcast program, the program reservation unit 6 performs program reservation processing. In this program reservation process, first, a program guide relating to an analog broadcast program is displayed on the display unit based on the program information supplied from the program information analysis / control unit 5. The displayed program guide is basically created based on the program guide included in the analog broadcast program information. In this program guide creation, the information included in the digital broadcast program information is included. It is also possible to use part or all of it. When using digital broadcast program information, the broadcast station correspondence table shown in FIG. 2 and the broadcast program correspondence table shown in FIG. 3 are referred to, and the corresponding programs (digital broadcast program and analog broadcast program) are referred to. Replace or add information with.

  After the program guide is displayed, when a user designates and inputs a desired broadcast program in the displayed program guide through the operation unit, a recording reservation list prepared in advance is displayed, and the recording reservation list is displayed. The information of the designated and inputted program is registered in. FIG. 5 shows an example of the recording reservation list. In this recording reservation list, a group number corresponding to a program designated by the user (a group number in the program correspondence table shown in FIG. 3) is registered. The programs (group numbers) registered in the recording reservation list are arranged, for example, in order from the earliest broadcast time.

  The broadcast time of the reserved program may be stored together with the set number in the recording reservation list. Thereby, the broadcast time of the reserved program can be acquired from the recording reservation list. Further, the corresponding digital broadcast program or analog broadcast program is obtained from the group number stored in the recording reservation list with reference to the program correspondence table shown in FIG. 4, and the broadcast time of the obtained program is obtained from the program guide. It can also be acquired.

  The recording reservation list is stored and managed in the program reservation unit 6, and the user can freely edit the stored contents. Specifically, when the user performs an operation for editing the contents of the reservation list on the operation unit, the program reservation unit 6 displays the contents of the recording reservation list currently stored on the display unit. When the content is changed on this displayed screen and an operation for confirmation is performed, the program reservation unit 6 stores the recording reservation list with the changed content.

(4) Scheduled recording process:
After the program reservation is confirmed, the program information analysis / control unit 5 executes the reservation recording process according to the recording reservation list. FIG. 6 shows a procedure of the reserved recording process performed by the program information analysis / control unit 5. Hereinafter, the scheduled recording process will be described with reference to FIGS.

  First, it is determined whether or not the reservation is confirmed (step S20). When the user performs an operation for confirming the reservation, the program reservation unit 6 supplies a reservation confirmation signal to the program information analysis / control unit 5. The program information analysis / control unit 5 determines that the program reservation has been confirmed when this reservation confirmation signal is supplied.

  If it is determined in step S20 that the reservation has been confirmed, it is subsequently determined whether or not the search start time has come (step S21). The search start time is a time earlier by a predetermined time than the broadcast start time of the reserved program. The program information analysis / control unit 5 obtains the current time from a clock function (not shown), and when the current time is a predetermined time earlier than the broadcast start time of the reserved program, the search start time is set. Judge that it became. The search start time is determined for each program (group number) registered in the recording reservation list shown in FIG.

  When the search start time is reached, the reception channel in the digital tuner 1 is subsequently adjusted to the channel on which the digital broadcast program corresponding to the reserved program is broadcast (step S22). In this channel control, first, the digital broadcast program and the analog broadcast program corresponding to the set number at the search start time in the recording reservation list shown in FIG. 5 are acquired from the program correspondence table shown in FIG. Here, it is assumed that the group program “3” is the search start time, and the digital broadcast program DAC and the analog broadcast program AAA corresponding to the group number “3” are acquired from the program correspondence table. Next, the digital broadcast station D3 that broadcasts the acquired digital broadcast program DAC is acquired from the digital broadcast program list shown in FIG. The reception channel of the digital tuner 1 is matched with the channel of the digital broadcasting station DAC acquired in this way.

  When the reception channel of the digital tuner 1 is set, a search for the digital broadcast reception signal from the digital tuner 1 is started (step S23), and it is checked whether or not the broadcast of the digital broadcast program DAC is started (step S23). S24). FIG. 7 shows a format example of a general digital broadcast signal. The digital broadcast signal is obtained by multiplexing video, audio, data, current program information, and service information. Each cycle of video, audio, data, and current program information is short. On the other hand, the period of service information is long. The current program information includes program specifying information for specifying a currently broadcast program, and it is possible to determine which program is currently being broadcast based on this program specifying information. In step S24, the broadcast start of the digital broadcast program DAC is determined based on the program specifying information.

  If it is determined that the broadcast of the digital broadcast program DAC has been started, then the reception channel in the analog tuner 2 is adjusted to the channel on which the analog broadcast program corresponding to the reserved program is broadcast (step S25). In this channel control, the reception channel of the analog tuner 2 is matched with the channel of the analog broadcast program AAA acquired in step S22.

  When the reception channel of the analog tuner 2 is set, a recording start command is transmitted to the analog broadcast recording unit 7 to start recording of the analog broadcast program AAA (step S26). At this time, simultaneously with the transmission of the recording start command, the supply of the digital program information acquired by the digital program information acquisition unit 3 to the analog broadcast recording unit 7 is also started. Thereby, digital program information can be given to the recording data of the analog broadcast program AAA.

  When the recording of the analog broadcast program AAA is started, it is subsequently checked whether or not the broadcast of the digital broadcast program DAC has ended (step S27). This broadcast end determination is also made based on the program specifying information included in the current program information of the digital broadcast signal shown in FIG. When the broadcast of the digital broadcast program DAC is completed, a recording end command is transmitted to the analog broadcast recording unit 7 to end the recording of the analog broadcast program AAA (step S28).

  According to the above reservation recording process, (1) the same program is broadcast at the same time in each of the analog broadcast and the digital broadcast, and (2) the program broadcast information is used in the digital broadcast by using the program specific information. Even when a sudden change occurs, when recording an analog broadcast program using the fact that the broadcast time after the change can be accurately grasped, the start and end timing of the recording is broadcast at the same time. The digital broadcast program, which is the same program, is obtained from the start and end of broadcasting. That is, the broadcast start timing and the broadcast end timing of the analog broadcast program are obtained using the program specific information of the digital broadcast. In this way, it is possible to follow a sudden change in the broadcast time of an analog broadcast program.

  Next, recording data stored in the storage device 8 will be described. In the recording system of the present embodiment, when the analog broadcast recording unit 7 records an analog broadcast program, the digital broadcast information supplied from the program information analysis / control unit 5 can be added to the recorded data. . FIG. 8 shows an example of recorded data.

  Referring to FIG. 8, the recording data includes a recording file and a program information file. The recording file is a file in which the video signal and the audio signal of the analog broadcast program are respectively stored by the MPEG (Moving Picture Cording Experts Group) method. The program information file is a file that stores information such as program name, detailed program information, genre, and performers. These recording files and program information files can be reproduced arbitrarily. In file playback, a recorded file and a program information file can be played back in conjunction with each other or can be played back individually.

  By adding the program information file to the recorded data, more detailed program information can be provided when the recorded data is reproduced. In particular, since the information stored in the program information file is program information obtained from digital broadcasting, the amount of information is much larger than that of analog broadcasting program information. Therefore, when reproducing an analog broadcast program, program information having an unprecedented amount of information can be provided.

  In digital broadcasting, a series ID that can identify the number of episodes is assigned to each story of a series program (such as a series drama). If this series ID is stored as the program information stored in the program information file, each story can be continuously played back using the series ID when the recorded data stored in the storage device 8 is played back. . In addition, when recording data stored in the storage device 8 is stored in another recording medium such as a DVD, the series can be stored together in the recording medium.

  Furthermore, by registering the reserved program in the recording reservation list in association with the series ID, it is possible to automatically avoid the registration of the reserved program with overlapping broadcast times. If it demonstrates concretely, the program reservation part 6 will perform automatic avoidance in the following procedures.

  First, it is checked whether there are programs registered in the recording reservation list that have overlapping broadcast hours. If there are programs with overlapping broadcast hours, it is checked whether or not a series ID is assigned to these programs. If there is a program to which a series ID is assigned, a rebroadcast program in another broadcast time zone to which the same series ID is assigned is searched for in the program guide. If there is a rebroadcast program, the rebroadcast program is registered in the recording reservation list instead of the original program. Thereby, automatic avoidance is realized. This automatic avoidance is particularly effective when the number of analog tuners is one. In addition, when a series ID is assigned to each of the programs with overlapping broadcast hours, it is desirable to compare the length of the broadcast time of each program and to search for the rebroadcast program for the shorter broadcast time. . This is because a program with a short broadcast time is less likely to overlap with another reserved program when the rebroadcast program is registered.

  In the recording system of this embodiment, a program search can be performed based on a keyword input by the user through the operation unit. This program search is performed by the program information analysis / control unit 5. Specifically, the program information analysis / control unit 5 includes digital broadcast program information supplied from the digital program information acquisition unit 3 and analog broadcast program information supplied from the analog program information acquisition unit 4. The program information is held, and it is searched whether or not the keyword input by the operation unit exists in the held program information. If it exists, the related information (including the program name and its detailed information) is displayed on the display unit. When information about a plurality of programs is searched as a search result, a list thereof is displayed. The user can reserve a program with reference to the displayed information.

  The program search uses analog broadcast program information and digital broadcast program information. In many cases, different pieces of information are prepared for the same program information even if they are the same program. Therefore, by combining these pieces of program information, more information can be searched. Therefore, it is possible to search a program desired by the user with a high probability.

(Other embodiments)
The embodiment described above is an example of the present invention, and the configuration and operation thereof can be changed as appropriate. For example, in the system shown in FIG. 1, it is possible to provide two or more analog tuners. By configuring in this way, it is possible to record a plurality of programs with overlapping broadcast times.

  FIG. 9 shows a procedure of the scheduled recording process performed by the program information analysis / control unit 5 when a plurality of analog tuners are provided in the system of FIG. First, it is determined whether or not the program reservation is confirmed (step S30). When the program reservation is confirmed, it is subsequently determined whether or not the search start time has come (step S31). The processing so far is the same as the processing of steps S20 and S21 shown in FIG.

  When the search start time is reached, it is subsequently determined whether or not there are a plurality of reserved programs that have reached the search start time (step S32). If the determination is “No”, one of the plurality of analog tuners is assigned as an analog tuner for receiving a reserved program (step S33). Then, digital broadcast channel matching (step S34) and digital broadcast program search (step S35) are sequentially performed to record the reserved program (step S36). The digital broadcast channel matching in step S34 and the digital broadcast program search in step S35 are the same as steps S22 and S23 in FIG. 6, respectively. In the reserved program recording in step S36, the processes in steps S24 to S28 in FIG. 6 are performed.

  If “Yes” is determined in step S30, an analog tuner is assigned to each reserved program (step S32). Next, a digital broadcast program corresponding to each reserved program is searched while periodically switching the reception channel in the digital tuner between digital broadcast channels on which each reserved program is broadcast (steps S33 and S34). Then, it is checked whether or not broadcasting is started for each digital broadcast program. If there is a digital broadcast program that has started broadcasting, the reserved program corresponding to the digital broadcast program is recorded (step S35). Specifically, the recording of each reserved program in step S35 is performed as follows.

  First, the reception channel of the analog tuner assigned for receiving the reserved program corresponding to the digital broadcast program for which broadcasting has started is matched with the channel on which the corresponding analog broadcast program is broadcast. Subsequently, a recording start command is transmitted to the analog broadcast recording unit 7 to start recording of the corresponding analog broadcast program. At this time, simultaneously with the transmission of the recording start command, supply of the corresponding digital program information acquired by the digital program information acquisition unit 3 to the analog broadcast recording unit 7 is also started. When recording of an analog broadcast program is started, it is subsequently checked whether or not the corresponding digital broadcast program has been broadcast. When the broadcasting of the corresponding digital broadcast program ends, a recording end command is transmitted to the analog broadcast recording unit 7 to end the recording of the analog broadcast program. In this procedure, all reserved programs are recorded.

  In the above-described reserved recording process, a plurality of reserved programs having overlapping broadcast hours can be recorded simultaneously. For example, when two analog tuners are provided, two programs with overlapping broadcast time zones can be recorded simultaneously. In this case, in the analog broadcast recording apparatus, a first buffer to which an analog broadcast reception signal from one analog tuner is supplied, and a second buffer to which an analog broadcast reception signal from the other analog tuner is supplied The output signals from these buffers are stored in the storage device 8 in a time-sharing manner. Thereby, two programs can be recorded simultaneously.

  Further, when recording a plurality of reserved programs, the broadcast start timing and the broadcast end timing of the analog broadcast program are obtained for each reserved program using the digital broadcast program specifying information. Therefore, it is possible to follow a sudden change in broadcast time for each reserved program (analog broadcast program).

It is a block diagram which shows schematic structure of the video recording system which is the 1st Embodiment of this invention. It is a flowchart which shows the procedure relevant to a reservation video recording. It is a figure for demonstrating matching with an analog broadcasting station and a digital broadcasting station. It is a figure for demonstrating matching with a digital broadcast program and an analog broadcast program. It is a schematic diagram which shows an example of a video recording reservation list. It is a flowchart which shows one procedure of a reservation video recording process. It is a schematic diagram which shows the example of a format of a general digital broadcast signal. It is a schematic diagram which shows an example of video recording data. It is a flowchart which shows one procedure of the reservation video recording process performed in the video recording system which is other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Digital tuner 2 Analog tuner 3 Digital program information 4 Analog program information 5 Program information analysis / control part 6 Program reservation part 7 Analog broadcast recording part 8 Storage device

Claims (14)

A digital tuner that receives digital broadcasts;
At least one analog tuner for receiving analog broadcasts;
A recording unit for recording an analog broadcast program received by the analog tuner;
A control unit for controlling the recording start and the recording end of the analog broadcast program in the recording unit based on the broadcast start timing and the broadcast end timing of the digital broadcast program corresponding to the analog broadcast program received by the digital tuner ;
A digital program information acquisition unit for acquiring digital broadcast program information including at least program specifying information capable of specifying a currently broadcast program from the digital broadcast reception signal output from the digital tuner;
A program correspondence table showing a correspondence relationship between the analog broadcast program broadcast by the analog broadcast and the digital broadcast program broadcast by the digital broadcast;
The control unit checks the digital broadcast program corresponding to the analog broadcast program to be recorded with reference to the program correspondence table, and based on the program identification information of the digital broadcast program acquired by the digital program information acquisition unit A recording system that determines broadcast start timing and broadcast end timing . The digital broadcast program information includes program information related to all programs broadcast by the digital broadcast,
The control unit supplies program information related to the analog broadcast program included in the digital broadcast program information acquired by the digital program information acquisition unit to the recording unit,
The recording system according to claim 1, wherein the recording unit adds program information supplied from the control unit to the recorded analog broadcast program.   The recording system according to claim 2, wherein the digital broadcast program is a series program, and the program information added by the recording unit includes a series ID indicating the order of the series. A display unit;
An operation unit;
An analog program information acquisition unit that acquires analog broadcast program information regarding all programs broadcast in the analog broadcast from the analog broadcast reception signal output from the analog tuner;
The control unit holds the digital broadcast program information acquired by the digital program information acquisition unit and the analog broadcast program information acquired by the analog program information acquisition unit, and a keyword input through the operation unit The recording system according to claim 2, wherein the program information related to is searched from the stored information, and the search result is displayed on the display unit.   Based on the digital broadcast program information acquired by the digital program information acquisition unit and the analog broadcast program information acquired by the analog program information acquisition unit, a program guide relating to the analog broadcast is created and displayed on the display unit The recording system according to claim 4, further comprising a program reservation unit that registers a program arbitrarily selected from the program guide in a reservation list prepared in advance. The digital broadcast program is a series program, and a series ID indicating the order of the series is assigned to the program corresponding to the series program in the program table,
The program reservation unit determines whether or not a rebroadcast program exists in any of these programs when a broadcast time zone overlaps with another program already registered when the program is registered in the reservation list. 6. The recording system according to claim 5, wherein a determination is made based on the series ID in the program guide, and if there is a rebroadcast program, the rebroadcast program is registered in the reservation list instead of the original program. There are a plurality of the analog tuners,
The recording unit records a plurality of analog broadcast programs received by the plurality of analog tuners and having overlapping broadcast time zones,
The control unit periodically switches the receiving channel of the digital tuner in each broadcasting channel of a plurality of digital broadcasting programs corresponding to each of the plurality of analog broadcasting programs, and the plurality of digital received by each broadcasting channel The recording system according to claim 1, wherein recording start and recording end of the plurality of analog broadcast programs in the recording unit are controlled based on a broadcast start timing and a broadcast end timing of the broadcast program. A recording method executed by a system for recording an analog broadcast program,
Receiving a digital broadcast channel on which a digital broadcast program corresponding to the analog broadcast program is broadcast before broadcasting the analog broadcast program to be recorded ;
A second step of receiving an analog broadcast channel on which the analog broadcast program to be recorded is broadcasted in response to a broadcast start timing of the digital broadcast program and starting recording of the analog broadcast program to be recorded;
A third step of ending the recording of the analog broadcast program to be recorded, triggered by the broadcast end timing of the digital broadcast program ;
A fourth step of acquiring program specifying information capable of specifying a currently broadcast program from the received signal of the digital broadcast channel;
A digital broadcast corresponding to the analog broadcast program to be recorded is referred to by referring to a program correspondence table showing a correspondence relationship between the analog broadcast program received on the analog broadcast channel and the digital broadcast program received on the digital broadcast channel. A fifth step of examining a program and determining the broadcast start timing and the broadcast end timing based on the program identification information of the digital broadcast program acquired in the fourth step . Obtaining program information related to the analog broadcast program to be recorded from the received signal of the digital broadcast channel;
The method for recording an analog broadcast program according to claim 8, further comprising the step of adding the acquired program information to the recording data of the analog broadcast program to be recorded.   10. The method for recording an analog broadcast program according to claim 9, wherein the digital broadcast program is a series program that is continuously broadcast, and the program information includes a series ID indicating what number in the series. Receiving digital broadcast and obtaining digital broadcast program information about all digital broadcast programs;
Receiving analog broadcast and obtaining analog broadcast program information about all analog broadcast programs;
Holding the acquired digital broadcast program information and analog broadcast program information;
9. The method of recording an analog broadcast program according to claim 8, further comprising: searching for program information related to the input keyword from the stored information and displaying the search result. Based on the acquired digital broadcast program information and analog broadcast program information, creating and displaying a program table related to the analog broadcast; and
12. The method for recording an analog broadcast program according to claim 11, further comprising the step of registering a program arbitrarily selected from the program guide in a reservation list prepared in advance. The digital broadcast program is a series program that is continuously broadcast, and assigning a series ID indicating the order of the series to the program corresponding to the series program in the program table;
When a broadcast time zone overlaps with another program already registered when the program is registered in the reservation list, whether or not a rebroadcast program exists in any of these programs is determined in the series in the program table. 13. The recording of an analog broadcast program according to claim 12, further comprising the step of determining based on the ID and registering the rebroadcast program in the reservation list in place of the original program if a rebroadcast program exists. Method. The analog broadcast program to be recorded is a plurality of analog broadcast programs with overlapping broadcast time zones,
The first step is a step of periodically switching and receiving each broadcast channel of a plurality of digital broadcast programs corresponding to each of the plurality of analog broadcast programs,
The second step is a step of starting recording of a corresponding analog broadcast program triggered by the broadcast start timing of each of the plurality of digital broadcast programs received in each broadcast channel;
9. The analog according to claim 8, wherein the third step is a step of ending recording of a corresponding analog broadcast program triggered by a broadcast end timing of each of the plurality of digital broadcast programs received on each of the broadcast channels. Broadcast program recording method.

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