JP2008245188A - Video recording apparatus and video recording method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem wherein in a conventional digital broadcast video recording apparatus, video recording is started after confirming an event information table of a program that is a recording object and a program map table of the same and the event information table and the program map table can not be received simultaneously with the starting time of the recording object program, so that if video recording is started after confirming both tables, then storage starting of video recording data is late several seconds, not to record the head of the program. <P>SOLUTION: Video recording starting time of a program that is a video recording object is set in a timer while monitoring an event information table. After starting the video recording with the aid of the timer, stop and continuation of the video recording are determined based on the information of the program map table of the program that is the video recording object. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a digital broadcast recording apparatus and recording method using satellite waves or terrestrial waves, and more particularly to an apparatus and method for adjusting a reserved recording start time in a recording reservation function.

  In recent years, digital broadcasting uses a high-quality, high-compression video and audio transmission method standard based on the MPEG-2 system (Moving Picture Experts Phase 2 Systems). The format is MPEG-2 TS (Transport). Stream) is employed. In MPEG-2TS, as shown in FIG. 1, in addition to video data and audio data, there is program sequence information called PSI / SI (Program System Information / Service Information), each of which is a TS packet (Transport). It is divided into blocks called “Stream Packets”. MPEG-2TS is composed of a series of multiplex broadcast data in which these TS packets are mixed. A TS packet is composed of a header and a payload. The header has an identification number called PID (Packet ID), and the same type of data has the same PID.

  In PSI / SI, there are various types of information such as PAT (Program Association Table), PMT (Program Map Table), and EIT (Event Information Table). The digital broadcast recording apparatus handles PSI / SI in units of data in a format called section. As shown in FIG. 2, a section is data obtained by connecting only payloads from one or more TS packets having the same PID.

  PAT, PMT, and EIT have the structures shown in FIGS. 3, 4, and 5, respectively.

The PAT shown in FIG. 3 is a table in which the PID for each channel currently being broadcast is recorded. The digital broadcast recording apparatus first receives the PAT, searches for the PMT corresponding to the selected channel, and performs the PMT. Acquire various information contained in the. For example, it is assumed that the PAT shown in FIG. 3 is acquired when a channel having a certain frequency is selected. The digital broadcast recording apparatus obtains that a service whose service_id (service identification) is s0 and s1 is broadcast on the channel, and that the PID of the PMT TS packet corresponding to each service is p0 and p1. obtain.
On the other hand, the PMT shown in FIG. 4 is a table in which information on each service broadcast on the currently selected channel is recorded. This includes the PID of a TS packet that contains a series of data in a format called ES (Elementary Stream) such as video data, audio data, data broadcast, and subtitles included in the service. In addition, the digital broadcast recording apparatus can obtain copy control information for the entire service and each ES indicated by the PMT. When recording the entire service or each ES, the copy is prohibited, only one generation can be copied, no restrictions. It is necessary to control recording correctly based on the information.

  The EIT shown in FIG. 5 targets a plurality of program frames scheduled to be broadcasted by a plurality of services in digital broadcasting, event identification for each program unit, broadcast start time, program title, program description information, genre code, etc. It is the table which recorded the program information of. Each program can be identified by event identification (event_id). Also, there are several types of EIT. Information on the current and next program called EIT [p / f] (present / following) is stored, or EIT [schedule] for the next week Some of them store program information. For example, when a program with event_id (event identification) = e0 shown in FIG. 5 is reserved for recording, the digital broadcast recording apparatus monitors the PMT copy control information of the service near the broadcast start time after selecting a channel. However, when the EIT [p / f] of the service is monitored and it is confirmed that the event_id stored in the EIT [p] representing the current program information is e0, the start of recording is instructed at that time. Then, the digital broadcast recording apparatus is configured to record video data, audio data of a program to be recorded based on the PID number of the TS packet of ES such as video data, audio data, data broadcast, subtitles, etc. included in the PMT representing the service, ES TS packets such as data broadcasting and subtitles are extracted and recorded.

  The procedure relating to such recording is described in Non-Patent Document 1.

“Digital Terrestrial Television Broadcasting Operation Regulations ARIB TR-B14 (2.9 Version)” P2-28, P4-15 to P4-17, P4-57 to P4-58, P4-62, P4-165 to P4-166 P4-191 to P4-193, P4-202 to P4-204, P4-207 to P4-213, P4-223 to P4-229, P4-288 to P4-291, P4-368, P4-370, P4 -388 to P4-389, P4-421 to P4-422, P4-434 to P4-435

  By the way, the conventional digital broadcast recording apparatus as described above monitors the PMT and EIT [p / f] corresponding to the program to be recorded, confirms both, and starts recording.

  Here, the digital broadcast recording apparatus can receive the PMT every 0.1 seconds on average and the EIT [p / f] every 1 to 3 seconds. That is, as shown in FIG. 10, the digital broadcast recording apparatus confirms both the PMT and EIT [p / f] corresponding to the program to be recorded, and starts recording. There was a problem that it was delayed and the beginning of the program was missing.

  The present invention has been made in view of the above points, and provides a recording apparatus and method for reducing the delay of a digital broadcast reservation recording start time delayed by a few seconds from the start of the program. Objective.

  The recording apparatus of the present invention includes a monitoring means for monitoring an event information table and a program map table of program arrangement information existing for each digital broadcast program, an event ID of a recording target program, and a program arrangement existing for each digital broadcast program When a match with the event ID included in the event information table of the information is confirmed, timer setting means for setting a recording start time for recording the recording target program with a timer, and the timer as the recording start time of the recording target program Recording start means for starting recording of the recording target program, and after the recording of the recording target program starts, the presence or absence of copy prohibition information in the program map table of the recording target program is determined. Recording discriminating means for stopping recording of the target program and continuing recording of the target program when there is no copy prohibition information Characterized in that it comprises a.

  The recording method of the present invention includes a step of monitoring an event information table and program map table of program arrangement information existing for each digital broadcast program, an event ID of a recording target program, and program arrangement information existing for each digital broadcast program When a match with the event ID included in the event information table is confirmed, a step of setting a recording start time for recording the recording target program with a timer, and when the timer becomes the recording start time of the recording target program , The step of starting the recording of the recording target program, and after the recording of the recording target program starts, the presence or absence of copy prohibition information in the program map table of the recording target program is determined. And the step of continuing the recording of the program to be recorded when there is no copy prohibition information. To.

  When performing scheduled recording in digital broadcasting, the PMT (program map table) and EIT (event information table) corresponding to the program to be scheduled for recording are both confirmed, and this method is compared with the conventional method for starting recording. In the invention, since the recording start time is set by the timer and the recording is started, there is an effect that the delay of the start time of the reserved recording can be reduced.

  Hereinafter, embodiments of the present invention in a digital broadcast recording apparatus will be described in detail with reference to the drawings.

  FIG. 6 is a diagram showing the configuration of the digital broadcast recording apparatus according to the embodiment of the present invention.

  A digital broadcast recording apparatus 10 according to an embodiment of the present invention includes a tuner 1, a PID filter 2, a PSI / SI management unit 3, a scheduled recording management unit 4, a recorded data accumulation processing unit 5, and a time management unit 6. , A recording data storage unit 7 and a control unit 8 are provided.

  When the tuner 1 is tuned to a channel of a certain frequency, it demodulates and decodes a digital broadcast wave received by an antenna (not shown), and outputs it to the PID filter 2 as a transport stream (TS).

  The PID filter 2 separates and extracts TS packets with the filter conditions set from the output TS. In other words, ES TS packets such as video data, audio data, data broadcast, and subtitles included in the designated service are separated and extracted and output to the recorded data storage processing unit 5. The PID filter 2 separates and extracts the PSI / SI TS packet, extracts the payload from the TS packet, forms a section, and outputs the section to the PSI / SI management unit 3.

  The PSI / SI management unit 3 manages the PMT and EIT of the currently broadcast service.

  The scheduled recording management unit 4 manages an event ID of a program to be scheduled for recording, a broadcast date and time (including a start time) of the program, a channel number, a service number, and the like.

  The recording data storage processing unit 5 performs processing for storing recording data of programs to be reserved for recording, and stores recording data of programs to be reserved for recording in the recording data storage unit 7.

  The time management unit 6 manages the time related to reserved recording, in particular, the start time of a program to be reserved.

  The control unit 8 is for realizing the reserved recording start time adjustment function in the digital broadcast recording apparatus 10, and details will be described in the operation of the present embodiment described with reference to FIG.

  The operation of this embodiment will be described with reference to the flowcharts of FIGS. 8 and 9 show a series of flowcharts divided into two parts.

  The reservation recording start time adjustment process starts approximately 5 to 15 seconds before the broadcast start time of a program (hereinafter referred to as a target event) to be reserved recording (step S800).

  The control unit 8 separates and extracts the PIT / SI management unit 3 by the PID filter 2 in order to confirm the existence of the EIT [f] corresponding to the program to be scheduled recording that has been registered in the reservation recording management unit 4 in advance. Monitor the PSI / SI. If the event ID included in EIT [f] matches the event ID of the target event, the reserved recording start time adjustment processing moves to the next step S811, and if not, moves to step 821. (Step S810).

  Here, EIT [f] will be described. As shown in FIG. 7, when the target event is program B, the broadcast start time of program B is 8: 00: 00: 00. Since the scheduled recording start time adjustment process of this embodiment starts from about 7:59:45, the EIT of the target event at the start time must be EIT [f]. Therefore, the PSI / SI management unit 3 needs to confirm this EIT [f].

  In step S810, if the PSI / SI management unit 3 can confirm that the EIT [f] matches the event ID of the target event, the PSI / SI management unit 3 determines whether the start time is determined in the EIT [f]. To check. Here, if the start time is undecided, the process for adjusting the scheduled recording start time proceeds to step S821, and if the start time is fixed, the process proceeds to step S822 (step S811).

  In step S810, if the event ID included in EIT [f] does not match the event ID of the target event, or if the start time of EIT [f] of the target event is undecided in step S811, the scheduled recording management unit 4 cancels the reserved recording of the registered target event and ends the reserved recording start time adjustment process (steps S821 and S829).

  In step S811, when the start time of EIT [f] of the target event is fixed, the control unit 8 starts the recording data storage process for the time management unit 6 at the start time of EIT [f]. A timer is set as described above (step S822).

  The time management unit 6 monitors whether the timer has reached the start time of the recorded data storage process. When the start time is reached, the process of adjusting the scheduled recording start time proceeds to step S840. Otherwise, the time management unit 6 repeats the monitoring (step S830).

  In step S830, when the timer reaches the start time of the recording data storage process, the PSI / SI management unit 3 determines whether there is information such as “copy prohibition” in the copy control information from the PMT value immediately before the recording data storage process. Confirm. When the PSI / SI management unit 3 obtains information that hinders the start of the recording data storage process such as “copy prohibited”, the recording data storage processing unit 5 does not start the recording data storage process, but adjusts the scheduled recording start time The process proceeds to step S880. On the other hand, if the result of determination in step 840 is that there is no information that hinders the start of recording data storage processing, the scheduled recording start time adjustment processing moves to step S841 (step S840).

  In step S840, if there is no information in the PMT information immediately before the recording data storage process that prevents the recording data storage process from starting, the recording data storage processing unit 5 at that time, based on the PMT copy control information, As the filter condition for the filter 2, the PID of the TS packet corresponding to the ES capable of recording data storage processing is designated. Then, the recorded data accumulation processing unit 5 starts accumulating ES TS packets such as video data, audio data, data broadcast, and caption obtained through the PID filter 2 in the recorded data accumulation unit 7 (step S841).

In step S840, if there is information in the PMT information immediately before the recording data storage process that prevents the recording data storage process from starting, the PSI / SI management unit 3 checks whether the PMT has been updated. If the PMT has not been updated, the reservation recording start time adjustment process repeats this step once again (step S880).
In step S880, if the PMT has been updated, the recorded data storage process by the conventional method is performed. That is, the PSI / SI management unit 3 confirms whether there is no information that prevents the start of the recording data storage process and the event ID of EIT [p] matches the event ID of the target event, and these conditions are satisfied. For example, the recorded data accumulation processing unit 5 starts a recorded data accumulation process. If any of these conditions is not satisfied, or if the waiting time for confirming EIT [p] requires a certain time or more, the scheduled recording start time adjustment process proceeds to step S870 ( Steps S881, S890, S891, S892, and S899).

  In step S841, when recording of the recording data of the target event is started, the PSI / SI management unit 3 checks whether the PMT has been updated. If the PMT has not been updated, the reservation recording start time adjustment process repeats this step once again (step S850).

  If the PMT has been updated in step S850, the PSI / SI management unit 3 confirms the presence / absence of information such as “copy prohibited” in the copy control information from the value of the PMT, and stores recorded data such as “copy prohibited”. If there is no information that hinders the start of the process, the process of adjusting the scheduled recording start time proceeds to step 860. On the other hand, if there is information in the copy control information included in the PMT that prevents the start of the recording data storage process such as “copy prohibited”, the scheduled recording start time adjustment process proceeds to step 870 (step S851).

  In step S860, the PSI / SI management unit 3 checks whether the event ID of EIT [p] matches the event ID of the target event. If the event ID of EIT [p] matches the event ID of the target event, the recording data storage processing unit 5 continues to store the recording data of the target event as it is, and ends the recording data storage at the broadcast end time of the target event. . On the other hand, if the event ID of EIT [p] does not match the event ID of the target event, the scheduled recording start time adjustment process proceeds to step S861 (steps S860 and S869).

  In step S861, the control unit 8 checks whether or not a certain period of time has elapsed since the first transition to step 860. If the certain time has not elapsed, the reservation recording start time adjustment process repeats step S860 once again. On the other hand, if the predetermined time or more has elapsed, the process of adjusting the scheduled recording start time proceeds to step S870 (step S861).

  In step S870, the control unit 8 first instructs the reserved recording management unit 4 to cancel the currently recorded state and enter the recording stopped state in order to stop the recording data accumulation of the target event. Next, the control unit 8 instructs the recorded data accumulation processing unit 5 to stop the processing currently being accumulated. Further, the control unit 8 instructs to delete the recording data stored in the recording data storage unit 7. Thereafter, the reservation recording start time adjustment process ends (steps S870, S871, S872, and S879).

The figure showing TS packet structure of a digital broadcasting signal. A diagram showing the concept of a section composed of multiple TS packets The figure showing the data structure of PAT. The figure showing the data structure of PMT. The figure showing the data structure of EIT [p / f]. The block diagram of the digital broadcast recording device which has a reservation recording start time adjustment function. The figure showing the operation of PMT and EIT [p / f]. The flowchart figure which shows operation | movement of this embodiment (the 1). Flowchart diagram showing the operation of the present embodiment (part 2). The figure showing the present subject.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tuner 2 PID filter 3 PSI / SI management part 4 Reservation recording management part 5 Recording data storage process part 6 Time management part 7 Recording data storage part 8 Control part 9 Digital broadcast recording device

Claims (2)

In a recording device that receives and records digital broadcasts,
Monitoring means for monitoring an event information table and a program map table of program arrangement information existing for each program of the digital broadcast;
When a match between the event ID of the recording target program and the event ID included in the event information table of the program arrangement information existing for each program of the digital broadcast is confirmed, a recording start time for recording the recording target program is set. Timer setting means to set with a timer;
Recording start means for starting recording of the recording target program when the timer reaches the recording start time of the recording target program;
After the recording of the recording target program is started, it is determined whether or not copy prohibition information exists in the program map table of the recording target program. When copy prohibition information is present, recording of the recording target program is stopped and copy prohibition information is not present Recording discriminating means for continuing recording of the recording target program;
A recording apparatus comprising: In a recording method for receiving and recording digital broadcasting,
Monitoring an event information table and a program map table of program arrangement information existing for each digital broadcast program;
When it is confirmed that the event ID of the recording target program matches the event ID included in the event information table of the program arrangement information existing for each digital broadcast program, the recording start time for recording the recording target program is set. A step of setting by a timer; and a step of starting recording of the recording target program when the timer reaches a recording start time of the recording target program;
After the recording of the recording target program is started, it is determined whether or not there is copy prohibition information in the program map table of the recording target program, and if there is copy prohibition information, recording of the recording target program is stopped and there is no copy prohibition information , Continuing to record the recording target program;
A recording method comprising:

Images