JP2011077895A - Stream recording device and method of recording stream - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the optimum storage system for recording a stream of digital broadcasting. <P>SOLUTION: A stream recording device is equipped with: a TS reception processing module 11 including a tuner for receiving broadcast program data; a service recording module 131 for recording service recording content onto any of HDDs 14A to 14D in a first recording format, where stream including a plurality of broadcast programs successively broadcasted by the same channel is recorded, from the received broadcast program data; and an event recording module 132 for recording event content onto any of the HDDs 14A to 14D in a second recording format, where the stream of one broadcast program in the plurality of broadcast programs is recorded, from the first content. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a stream recording apparatus and a stream recording method for recording a broadcast program broadcast by digital broadcasting in a storage device.

  As the storage capacity of the storage device increases, it is possible to record a long-time digital broadcast program on the storage device. For example, it has become possible to store all programs aired on one channel in one week in a storage device.

  Patent Document 1 discloses that a broadcast program for one day is recorded by overwriting, and a program designated by the user from the recorded broadcast program is recorded in a storage area.

Japanese Patent Laid-Open No. 10-234007

  In the case of digital broadcasting, is it possible to record for each program unlike conventional analog broadcasting? If recording is possible, is it possible to copy to media? The right protection information indicating is attached, and the receiver needs to perform control according to this information. In addition, since the method of reproduction is different between the case of temporary recording and the case of recording for storage, it is necessary to change the recording format to achieve the maximum performance.

  An object of the present invention is a stream recording apparatus and a stream recording method capable of providing an optimum storage method for recording a digital broadcast stream.

  A stream recording apparatus according to an example of the present invention includes a receiving module that receives a broadcast stream, and a first recording unit that records the broadcast stream received by the receiving module in a first recording format for continuously recording the broadcast stream. And a second recording for selecting a program stream corresponding to the program selected from the broadcast stream recorded by the first recording means and recording a stream of the program selected from the broadcast stream received by the receiving module. And second recording means for recording the selected program stream according to a format.

  According to the present invention, it is possible to provide an optimum storage method for recording a digital broadcast stream.

1 is a block diagram showing a configuration of a digital broadcast recording apparatus according to an embodiment of the present invention. The block diagram which shows the structure of TS reception processing module shown in FIG. The block diagram which shows the structure of the recording / reproducing process module shown in FIG. The figure which shows the program schedule displayed on the display screen of a monitor. The figure which shows the function selection window displayed on the program guide shown in FIG. The figure which shows the area of the event recording content with respect to service recording content.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram showing the configuration of a digital broadcast television that receives and displays a digital broadcast according to an embodiment of the present invention.

  A digital broadcast television 1 as a content recording device includes a digital broadcast receiver 10 and a monitor 40. The digital broadcast receiving apparatus 10 receives a digital broadcast wave (broadcast program data) and demodulates the stream. The digital broadcast receiving apparatus 10 records content based on the demodulated stream in a storage device. The digital broadcast receiver 10 generates a video signal and an audio signal from the stream or content and outputs them to the monitor 40. The monitor 40 as a display device displays a video based on the video signal on a display screen table. The monitor 40 outputs sound from the speaker based on the audio signal. HDMI (High-Definition Multimedia Interface), wireless HDMI, or the like is used for signal transmission between the digital broadcast receiving apparatus 10 and the monitor 40.

  The digital broadcast receiver 10 includes a TS reception processing module 11, a CAS control module 12, a recording / reproduction processing module 13, hard disk drives (HDD) 14A to 14D, a signal selection module 15, an AV decoding processing module 16, a display processing module 17, a program A database processing module 18, a dubbing count management module 19, a viewing control module 20, a memory 21, a display control module 22, and the like are provided.

  The TS reception processing module 11 selectively receives digital broadcast waves (broadcast program data) transmitted by one broadcaster, and outputs a plurality of transport streams (TS) obtained by demodulating the digital broadcast waves. It has a tuner.

  The frequency band (6 MHz) occupied by one channel of terrestrial digital television broadcasting is divided into 13 bands (about 5.57 MHz) and a guard band. The divided band is called a segment. Digital terrestrial television broadcasting ("one-segment partial reception service for mobile phones / mobile terminals"), so-called one-segment broadcasting, is transmitted using a central one segment and receiving mobile devices such as mobile phones. . A high-definition (HDTV) broadcast is transmitted using 12 segments excluding the central one segment. In some cases, 12 segments are used to transmit up to three programs for standard definition video (SDTV) broadcasting.

  The CAS control module 12 controls the destination of signals transmitted between the tuners included in the TS reception processing module 11 and the CAS cards 31A and 31B. A tuner for transmitting a signal to one CAS card is determined. The CAS control module 12 performs control such that signal transmission is performed between one CAS card and a tuner corresponding to the CAS card.

  The TS reception processing module 11 includes a plurality of tuners. The configuration of the TS reception processing module will be described with reference to FIG.

  The TS reception processing module 11 includes a plurality of tuners 110A, 110B, and 110C. Each tuner 110A, 110B, 110C includes tuner modules 111A, 111B, 111C, TS separation modules 112A, 112B, 112C, descrambler modules 113A, 113B, 113C, and the like.

  Each of the tuner modules 111A, 111B, and 111C selectively receives a digital broadcast wave broadcast from one channel, and demodulates a transport stream (TS) from the received digital broadcast wave. The streams demodulated by the tuner modules 111A, 111B, and 111C are sent to the TS separation modules 112A, 112B, and 112C. Separation modules 112A, 112B, and 112C separate program information (ECM) from the stream. The separated ECM is transferred to any one of the CAS cards 31A to 31D via the CAS control module 12. In the CAS card, the ECM encryption is decrypted using the stored work key (Kw) to obtain a scramble key (Ks). At the same time, attribute information related to the program is obtained from the ECM, and it is determined whether or not descrambling is performed in comparison with the contract information stored in the CAS card. When this determination is made, control is performed based on the charging method specified by the attribute information of the program. The scramble key Ks and the work key Kw are different for each broadcaster, but are common to all receivers.

The descrambler modules 113A, 113B, 113C descramble the encrypted stream using the set scramble key Ks, and output the descrambled stream. The recording / playback processing module 13 is the TS reception processing module 11. Recording processing for storing content based on the stream output from the storage media such as the HDDs 14A to 14D is executed. The recording / playback processing module 13 executes processing for playing back content recorded in the HDDs 14A to 14D. The HDDs 14A to 14D may be provided in a casing in which the recording / reproducing processing module 13 or the like is built, or may be provided outside the casing. For example, the HDDs 14A to 14D may be connected to the housing using an interface for connecting an external device such as a USB.

  As shown in FIG. 3, the recording / playback processing module 13 includes a service recording module 131, an event recording module 132, a one-segment recording module 133, and the like.

  The service recording module 131 records the transport streams output from the tuner modules 111A to 111C in the TS reception processing module 11 in predetermined areas of the HDDs 14A to 14D, respectively.

  Hereinafter, content recorded by the service recording module 131 is referred to as service recording content. The service recording content can be recorded for a predetermined time of the day, and for example, 3 hours from 9 o'clock to 12 o'clock or 24 hours from 0:00 to 24:00 can be set.

    The service recording module 131 records service recording content of an HDTV broadcast stream and service recording content of a one-segment broadcasting stream.

  The service recorded content is deleted from the HDDs 14A to 14D when a certain number of days have elapsed since recording. When the user designates a broadcast program to be stored, the content corresponding to the designated broadcast program can be recorded in any of the HDDs 14A to 14D by the event recording module 132.

  The event recording module 132 stores contents related to one broadcast program (event) in the HDDs 14A to 14D based on the stream output from the TS reception processing module 11 or the service recording contents recorded in the HDDs 14A to 14D by the service recording module 131. Record in either. The content recorded by the event recording module 132 is referred to as event recording content.

  The recording format of the event recording content is a format that selectively includes information necessary for reproduction of the designated broadcast program, and is the same as the recording format of the service recording content when a plurality of programs are multiplexed. The capacity is smaller than the content recorded in the recording format.

  The service recording content and the event recording content may be recorded on the same HDD (14A to 14D), or the service recording content and the event recording content may be recorded on different HDDs (14A to 14D).

  The one seg recording module 133 records one seg broadcasting related to one broadcast program in the HDDs 14A to 14D from the stream output from the TS reception processing module 11 or the service recording contents recorded in the HDDs 14A to 14D by the service recording module 131. .

  The signal selection module 15 selects data to be transmitted to the AV decoding processing module 16 from program broadcast data supplied from any tuner module in the TS reception processing module 11 and content output from the recording / playback processing module 13. To do.

  The AV decoding processing module 16 performs decoding processing on the stream or content transmitted from the signal selection module 15.

  The display processing module 17 generates data to be displayed on the monitor under the control of the display control module 22.

  The program database processing module 18 manages the contents stored in the HDDs 14A to 14D. Data for creating a program guide is managed based on program information included in the stream.

  The dubbing count management module 19 manages the number of times that content stored in the HDDs 14A to 14D is permitted. Currently, in digital terrestrial broadcasting, a dubbing frequency limit called dubbing 10 is implemented. In the case of dubbing 10, the content is given dubbing restrictions of 9 copies and 1 move for each event (program). Hereinafter, the number of copies and the number of moves are collectively referred to as a dubbing permission number. When the number of times of dubbing permission is 1, only content movement can be performed.

  The viewing control module 20 executes viewing processing for outputting video data included in the stream received by the TS reception processing module 11 to a display device such as an LCD through a graphics controller. In the viewing process, a process of outputting the audio data included in the stream to the speaker through the sound controller is also executed. For example, only one broadcast program can be viewed simultaneously.

  In this way, recording in different formats such as service recording contents and event recording contents can cope with various applications.

  For example, event record content is easy to manage titles, so it is suitable for applications that reproduce desired titles from list display and search, and service record content records all past times. In other words, past time Since it is the same as receiving a broadcast (no break between programs), it is suitable for an application for viewing content recorded in the same operating environment as the current viewing.

  A case will be described in which the event recording module 132 records event recording content related to one event in the HDDs 14A to 14D from the service recording contents recorded in the HDDs 14A to 14D by the service recording module 131.

  Next, a procedure in which the user designates a broadcast program for generating event recording content from broadcast programs included in the service recording content will be described.

  The program database processing module 18 executes processing for displaying the program table shown in FIG. 4 on the display screen of the monitor 40 from the program information included in the service recording content.

  This program table shows broadcast programs that have been broadcast in the past from the current date and time (10/11 (Friday) PM 3:13) displayed in the upper left, and are recorded in the HDDs 14A to 14D as service recording contents. When the program table is displayed and the user selects and determines a field indicating one broadcast program by operating the remote controller or the like, as shown in FIG. 5, a function selection window 200 is displayed in the program table. Overlaid. When the selection and determination operation of the reproduction button 201 in the function selection window 200 is performed, the broadcast program for which the selection and determination operation has been performed is reproduced. When the recording button 202 is selected and determined in the function selection window 200, the event recording content is recorded from the service recording content by the event recording module 132.

  By the way, as shown in FIG. 6, the service recording content 301 recorded in the HDDs 14A to 14D includes a plurality of broadcast programs (program A, program B, program C). When the event recording content 302 of one broadcast program (program B) is recorded on the HDD, the event recording module 132 is a section from the start of the broadcast time of the broadcast program (program B) to the end of the broadcast of the event (program B). Event recording content 302 having

  When the event recording content 302 is generated, the event recording module 132 sets the broadcast end time from 2 seconds before the broadcast start time is set based on the broadcast start time and broadcast time of the program B. HDTV broadcast content having a section between 2 seconds after is generated and recorded in the HDDs 14A to 14D. The broadcast end time is calculated from the broadcast start time and the broadcast time.

  The broadcast start time of an event (program) is recorded in a start_time field in an EIT (Event Information Table). The EIT broadcast time (duration) is recorded in the duration field. The event recording module 132 records the event recording content 302 with reference to the start_time field and duration field in the EIT. The EIT is data stored in the program arrangement information in the service recording content.

  The broadcast program is switched by searching the PMT (Program Map Table) in the stream and switching from the PMT of the previous program as the first point, and detecting the PMT of the next program as the second point. You may generate the event recording content which has the area after the fixed time from the 2nd point before the fixed time of the point.

  By the way, as the event recording module 132 records the event recording content in the HDDs 14A to 14D, the one seg recording module 133 generates the one seg broadcasting content of the same program from the service recording content, and the generated content is the HDD 14A to 14D. May be recorded.

  The program database processing module 18 manages the content generated as the content is recorded by the one-segment recording module 133. When the user instructs display of a list of contents recorded in the HDDs 14A to 14D, the recorded one-segment broadcast contents can be presented to the user.

  Next, a case where the dubbing frequency limit is given to the selected program will be described. Control information for limiting the number of times of dubbing is managed in units of events (programs).

  The dubbing count management module 19 manages each dubbing count so that the sum of the dubbing count of the service recording content and the dubbing count of the event recording content is set to 10.

  That is, the HDDs 14A to 14D are managed as one so as not to exceed the right protection level requested as the content.

  For example, the dubbing count management module 19 sets the permitted dubbing count to 10 times for a broadcast program in the service recording content that is being loop-recorded. If this content is recorded as an event recording content, the dubbing of the service recording content is performed. By setting the permission count to 1 and the event recording content dubbing permission count to 9 (8 copies + 1 move), both contents can be played back. Also, broadcast program information is displayed in the program guide as shown in FIG.

  When not reproducing after dubbing, the dubbing count management module 19 sets 0 as the dubbing permission count of the broadcast program in the service recording content and 10 times as the dubbing permission count of the event recording content (9 copies). + Move once) may be set.

  In the case of copy-once content, since it can no longer be copied when it is recorded as service-recorded content, if the selected program is in this case, a certain time before it is overwritten by loop recording as a move reservation (for example, 10 It is controlled to move as event recording content a minute ago.

  In this way, when it is actually played back, it can be played back as service-recorded content so that seamless playback is possible without the video being interrupted due to event switching similar to viewing of the current program. .

  Note that a module that receives an IP broadcast may be used instead of the tuner that receives the digital broadcast described above.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Digital broadcast television, 10 ... Digital broadcast receiver, 11 ... TS reception processing module, 12 ... CAS control module, 13 ... Recording / reproduction processing module, 14A-14D ... Hard disk drive, 15 ... Signal selection module, 16 ... AV Decoding processing module, 17 ... display processing module, 18 ... program database processing module, 19 ... dubbing frequency management module, 20 ... viewing control module, 21 ... memory, 22 ... display control module, 31A-31D ... CAS card, 40 ... monitor 131 ... Service recording module, 132 ... Event recording module, 133 ... One-segment recording module.

Claims (7)

A receiving module for receiving the broadcast stream;
First recording means for recording the broadcast stream received by the receiving module in a first recording format for continuously recording the broadcast stream;
According to a second recording format, a program stream corresponding to a selected program is selected from the broadcast stream recorded by the first recording means, and a program stream selected from the broadcast stream received by the receiving module is recorded. Second recording means for recording the selected program stream;
A stream recording apparatus comprising: Each program included in the broadcast stream received by the receiving module is set with a dubbing permission count,
When the program stream is recorded by the second recording unit, the program recording is recorded by the second recording unit and the dubbing permission number of the selected program included in the broadcast stream recorded by the first recording unit. The dubbing permission count of the program stream and the first dubbing permission count so as to be the sum of the dubbing permission count of the selected program included in the broadcast stream received by the receiving module. 2. The stream recording apparatus according to claim 1, further comprising a dubbing frequency management unit that manages the dubbing permission frequency of the selected program included in the broadcast stream recorded by one recording means.   The second recording means is arranged before and after a section based on the broadcast start time and end time of a program described in an EIT (Event Information Table) included in the broadcast stream recorded by the first recording means. The program stream is recorded by selecting a section in which a predetermined amount of section is added to the broadcast stream recorded by the first recording means. 2. A stream recording apparatus according to item 1. The second recording means includes a PMT (Program Map Table) corresponding to the selected program from the broadcast stream recorded by the first recording means, and a PMT corresponding to the next program of the selected program. And selecting a section in which a predetermined amount of section is added before and after the section between the two detected PMTs from the broadcast stream recorded by the first recording means. The stream recording apparatus according to claim 1, wherein recording is performed. The first recording means overwrites and records the broadcast stream with a new broadcast stream received by the receiving module after a certain period of time has elapsed since the broadcast stream was recorded by the first recording means,
When the right protection information set for the selected program is copy-once, the second recording means records the program stream for a predetermined time before the overwrite recording is performed,
The stream recording apparatus according to any one of claims 1 to 4, wherein after the recording of the program stream is finished, the broadcast stream recorded by the first recording unit is made unplayable. The broadcast stream recorded by the first recording means is a terrestrial digital television broadcast HDTV broadcast provided by a broadcaster,
One segment portion for a mobile phone / mobile terminal from the same broadcaster that provides the broadcast stream recorded by the first recording means in the third recording format for continuously recording the broadcast stream Third recording means for recording a broadcast stream provided by a reception service and received by the reception module;
Selecting a program stream corresponding to the program selected from the broadcast stream recorded by the third recording means according to a fourth recording format for recording a stream of the program selected from the broadcast stream received by the receiving module; Fourth recording means for recording the selected program stream;
The stream recording apparatus according to claim 1, further comprising: Recording the broadcast stream received by the receiving module in a first recording format for continuously recording the broadcast stream;
The second recording format for selecting a stream corresponding to a program selected from the broadcast stream program recorded by the first recording means and recording a stream of the program selected from the broadcast stream received by the receiving module. Recording the selected program stream by:
And a stream recording method.

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