JPWO2020208695A1 - Video recording / playback device and video recording / playback method - Google Patents

Abstract

An object of the present invention is to provide a technique for preventing a recorded program from being played from a specified time when the application cannot normally control the playback position when the recorded program is linked with the broadcast communication cooperation service. In the video recording / playback device 100, the recorded program information 140 includes program identification information that identifies the recorded program and broadcast section information 405 that indicates a continuously recorded broadcast section in the recording stream of the recorded program. , The application determines whether or not it is a recorded program in the video recording / playback device 100 based on the program identification information, and if it is a recorded program, based on the broadcast section information 405, from the acquired specified time. Judges whether or not playback is possible, and if it is determined that playback is possible, the recorded program is played from the specified time, and if it is determined that playback is not possible, the recorded program is specified. Do not play from the time.

Description

The present invention relates to a video recording / playback device and a video recording / playback method.

In recent years, while watching a broadcast program broadcast from the broadcasting station side, the service provider side receives the application and the distribution content via a telecommunication line such as the Internet, and executes the application to distribute the broadcast program and the distribution content. Broadcast communication cooperation services that play in cooperation with each other are widespread. In the conventional method, a broadcast communication cooperation service related to a program currently being viewed on the air is known (see, for example, Patent Document 1). The application is not the native software in the video recording / playback device, but refers to, for example, a Java application and a Web application, and is operated by an execution environment provided in the video recording / playback device.

By executing the application distributed by the service provider in this way, various application operations can be realized on the video recording / playback device side. As an example of the application operation model, past, present, and future program guide information is displayed in a list, and when the current broadcast program is selected, the program is switched to viewing, and when the future broadcast program is selected, the program is displayed. An operation model such as displaying a reservation screen of is known (see, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 2012-257221 Japanese Unexamined Patent Publication No. 2013-115829

In the broadcast program receiving device described in Patent Document 1, the application considers the broadcast cooperation service related to the program received in real time on the air, but does not consider the broadcast cooperation service related to the recorded program. If the application is linked to the program being broadcast, it is easy to acquire the information related to the program being viewed via the Internet. However, since the application cannot uniquely identify the recorded program, there is a problem that the information related to the recorded program cannot be searched via the Internet.

Patent Document 2 discloses a technique that enables information on recorded programs to be searched for via the Internet. Patent Document 2 describes that an electronic program guide displayed by an application identifies a program that has not been broadcast, a program that is currently being broadcast, and a program that has been broadcast in the past. However, if the application acquires chapter information associated with the recorded program via the Internet and controls the playback position based on the chapter information, a problem is likely to occur. Here, the playback position control is a control for playing back a recorded program from a designated time. This is because the playback position information acquired via the Internet is the elapsed time information from the start of broadcasting, so that the recorded program does not always start from the start time of broadcasting.

For example, when a one-hour broadcast program is recorded from the start 30 minutes, if the playback position information acquired from the Internet is at the 15-minute point, the video scene does not exist and is played back to the start 45 minutes. Position control is performed. If such playback position control is performed, there is a problem that the user is confused and the video recording / playback device is misunderstood as a malfunction.

Therefore, the present invention provides a technique for preventing the recorded program from being played back from a specified time when the application cannot normally control the playback position when the recorded program is linked with the broadcast communication cooperation service. The purpose is.

The video recording / playback device according to the present invention is a video recording / playback device capable of recording / playing a broadcast program, and has a recording program management unit that manages recorded program information recorded in the video recording / playback device. The recorded program information managed by the recorded program management unit includes program identification information for identifying the recorded program and recording of the recorded program. The application, which includes broadcast section information indicating a continuously recorded broadcast section in the stream, is executed by the application execution unit, and the recorded program in the video recording / playback device is based on the program identification information. It was determined whether or not it was possible, and if it was a recorded program, it was determined whether or not it was possible to reproduce from the acquired specified time based on the broadcast section information, and it was determined that reproduction was possible. In this case, the recorded program is played back from the designated time, and when it is determined that the recorded program cannot be played back, the recorded program is not played back from the designated time.

According to the present invention, when the application cannot normally control the playback position when the recorded program is linked with the broadcast communication cooperation service, the recorded program can be prevented from being played back from the designated time.

Objectives, features, aspects, and advantages of the present invention will become more apparent with the following detailed description and accompanying drawings.

It is a system block diagram of a video recording / playback device. It is explanatory drawing about the recording time structure of the recorded program. It is a figure which shows the recorded program information. It is a figure which shows the recorded program record edit information. It is a figure which shows the syntax of the broadcast section information. It is a figure which shows the display example of the electronic program guide which an application displays. It is a figure which shows an example of the past program reproduction screen displayed by an application. It is a figure which shows the warning screen which displays when the application cannot perform the reproduction position control normally for the recorded program in a video recording / reproduction apparatus. It is a figure which shows the execution operation flow of an application. It is a figure which shows the operation flow of the past program reproduction processing.

<Embodiment>
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a system block diagram of the video recording / playback device 100. As shown in FIG. 1, the video recording / playback device 100 includes a system control unit 101, a memory unit 120, a decoder block 150, a network interface unit 121, and a download data recording unit 122.

The system control unit 101 includes a recorded program management unit 124, a broadcasting service communication unit 125, and an application execution unit 126.

The decoder block 150 includes a tuner unit 102, a stream control unit 110, a recording / playback drive unit 103, a video decoder unit 111, an audio decoder unit 112, a video mixing unit 114, and a graphics generation unit 113.

The system control unit 101 integrally controls the entire video recording / playback device 100. The broadcast signal is decoded into an MPEG-2 transport stream by the tuner unit 102, and recorded in the recording / playback drive unit 103 via the stream control unit 110. In the present embodiment, the broadcast program recorded in the recording / playback drive unit 103 is referred to as a recorded program.

The recorded program is recorded as stream information in which the encoded video is multiplexed. Further, in addition to the stream information, the video and audio attribute information related to the encoded video stream separated from the stream information recorded in the recording / playback drive unit 103, and the playback start time information and playback in the access unit (usually GOP unit) of the stream information. The reproduction control information indicating the correspondence between the start position information is also recorded in the recording / reproducing drive unit 103. When recording a broadcast program, the recorded program management unit 124 in the system control unit 101 records the recorded program information 140 in the memory unit 120 as the program information.

When playing back a recorded program, a video stream encoded and compressed after the stream information for the program recorded in the recording / playback drive unit 103 is sequentially taken into the stream control unit 110 according to an instruction from the system control unit 101. Alternatively, a demultiplexer is used to separate and extract the audio stream.

The video decoder unit 111 decodes the video stream encoded by MPEG-2 or the like separated by the stream control unit 110 and decodes it into a video signal. The audio decoder unit 112 decodes the audio stream encoded by AC-3 or the like separated by the stream control unit 110 and decodes it into an output audio signal.

The graphics generation unit 113 decodes and displays the warning display generated by the system control unit 101 and the graphics generated by the application as image information. The video mixing unit 114 superimposes and displays the video signal generated by the video decoder unit 111 and the video signal generated by the graphics generation unit 113, and outputs an output video signal.

The display unit 115 outputs and displays the decoded output video signal and the output audio signal output from the audio decoder unit 112.

Further, the memory unit 120 connected to the system control unit 101 is a non-volatile memory in which the recorded program information 140 and the recorded program record editing information 141 managed by the recorded program management unit 124 are recorded.

The video recording / playback device 100 connects to the network via the network interface unit 121. Information downloaded from the network is recorded in the download data recording unit 122.

The download data recording unit 122 may be a non-volatile recording medium such as a smart media or a memory card. Further, the download data recording unit 122 does not necessarily have to be mounted inside the video recording / playback device 100, and may have a removable configuration.

The recorded program management unit 124 manages the recorded program information 140 and the recorded program record editing information 141 recorded in the memory unit 120. The recorded program information 140 is program attribute information generated at the start of recording. Further, the recorded program record editing information 141 is information indicating the editing history of the recorded program, the program recording state, and whether or not the recorded program is recorded from a reliable source, and is appropriately updated at the time of recording and editing. NS.

The broadcast service communication unit 125 connects to an external network line via the network interface unit 121, and acquires an application and a distribution program associated with the recorded program from the broadcast communication cooperation service. The application and the graphic component handled by the application are temporarily recorded in the download data recording unit 122. Then, under the instruction from the application execution unit 126, the graphics generation unit 113 decodes and displays the display. The distributed program is sequentially supplied from the network interface unit 121 to the stream control unit 110, decoded in the same manner as the recorded program, and output to the display unit 115 as video / audio.

The application execution unit 126 serves as an execution environment for the application acquired by the broadcasting service communication unit 125. The application performs processing such as superimposing and displaying various graphics in synchronization with the reproduced video and acquiring information related to the reproduced program via the network interface unit 121.

The system control unit 101 including the recorded program management unit 124, the broadcasting service communication unit 125, and the application execution unit 126 is a CPU (Central Processing Unit) that is not shown by executing software stored in a memory (not shown). It is realized as a function of. However, these may be realized by, for example, a plurality of CPUs in cooperation with each other. The recorded program management unit 124, the broadcasting service communication unit 125, and the application execution unit 126 may be realized by a signal processing circuit that realizes the operation by a hardware electric circuit. As a concept that combines the software recording program management unit 124, the broadcasting service communication unit 125, and the application execution unit 126, and the hardware recording program management unit 124, the broadcasting service communication unit 125, and the application execution unit 126, "department". The word "processing circuit" or "module" can be used instead of the word "".

Further, the tuner unit 102, the stream control unit 110, the video decoder unit 111, the audio decoder unit 112, and the image mixing unit 114 are realized by a signal processing circuit realized by a hardware electric circuit. A part of the tuner unit 102, the stream control unit 110, the video decoder unit 111, the audio decoder unit 112, and the video mixing unit 114 may be realized by software.

The recording / playback drive unit 103 is realized by, for example, an HDD (Hard Disk Drive). The display unit 115 is realized by, for example, a liquid crystal display.

The user operates the video recording / playback device 100 through the operation unit 130. Generally, the operation unit 130 refers to an operation panel, a remote controller, or the like arranged on the front panel of the video recording / playback device 100. The video recording / playback device 100 interprets the content of the instruction requested by the operation unit 130 and controls the decoder block 150 to reproduce arbitrary stream information.

FIG. 2 is an explanatory diagram of a recording time configuration of a recorded program. As shown in FIG. 2, it is assumed that the preceding program 201, the broadcast program 200, and the succeeding program 202 are broadcast in this order. In the present embodiment, a case where recording or editing is performed on a broadcast program 200 broadcast from 20:00 to 21:00 is considered.

Normally, when scheduled recording is performed for each program, as shown by Case A in FIG. 2, the entire section of the broadcast program from 20:00 to 21:00 is recorded as a recorded program 210. ..

Further, in order to prevent the beginning of the program from being recorded, recording may be started 5 seconds before the broadcast start time of the broadcast program 200. In this case, as in the recorded program 220 shown by Case B in FIG. 2, the last 5 seconds of the preceding program 201 and the section of the broadcast program 200 are recorded as a combined section.

In addition, even though scheduled recording is performed for each program, recording may be stopped in the middle due to insufficient recording capacity or user operation. In this case, it is recorded as the recorded program 230 shown by Case C in FIG. In Case C, the part from 20:00 to 20:45 is recorded, and the latter half of the program is not recorded. If the program is divided at 20:45 by editing after recording, the divided preceding program also becomes the recorded program 230 having the recording time configuration indicated by Case C.

In addition, reserved recording may be performed on a program-by-program basis after the broadcast of the broadcast program 200 is started. In this case, it is recorded as the recorded program 240 shown by Case D in FIG. In Case D, scheduled recording is started at 20:15 after 15 minutes have passed from the broadcast start time. If the program is divided at 20:15 by editing after recording, the divided subsequent program also becomes the recorded program 240 having the recording time configuration indicated by Case D.

In addition, the entire broadcast program 200 and a part of the subsequent program 202 may be recorded by a time-designated reservation or a manual recording reservation. In this case, it is recorded as the recorded program 250 shown by Case E in FIG. In Case E, from 20:00 to 21:30 including 30 minutes of the following program is managed as one recorded program 250.

In addition, the recorded program may be edited and a part of the recorded program may be deleted. In this case, for example, the recorded program 260 shown by Case F in FIG. 2 is obtained. In Case F, the sections from 20:05 to 20:15 and from 20:35 to 20:45 are deleted for the recorded program 260 from 20:00 to 21:00. When edited in this way, the recorded program 260 is managed as a recorded program 260 having a total recording time of 35 minutes from 20:15 to 20:35 and from 20:45 to 21:00. The recorded program 260 represented by Case F may have such a recorded program 260 even in a state where it cannot be received in the middle of the program due to the influence of a weak electric field of a broadcast wave or the like. Here, the recorded programs indicated by Cases A to F are recorded programs.

FIG. 3 is a diagram showing recorded program information 140. The recorded program information 140 is managed by dividing it into recorded program units. As shown in FIG. 3, the information corresponding to one recorded program is referred to as a recorded program record 300.

The recorded program record 300 is a program ID 301 that uniquely identifies a program, a broadcast date information 302 that indicates a broadcast recording date, a broadcast network information NID 303 that indicates a broadcast network, and a broadcast channel number information that indicates a broadcast channel number. A certain CID 304, TS_ID 305 indicating the transport stream ID of the broadcast program, program title information 306 indicating the broadcast program name, recording start time information 307 indicating the recording start time, recording time length 308 indicating the length of the recording time, and offset time. It is composed of 310.

NID303 is information indicating a broadcasting network, and specifies information such as "BS", "CS1", "CS2", and "terrestrial digital broadcasting". Further, CID 304 indicates a broadcast channel number in the broadcast network specified by NID 303. TS_ID305 is a number that identifies the transport stream of the broadcast program.

The program title information 306 is a broadcast program name. The recording start time information 307 indicates not the start time of the broadcast program but the time when the recording actually started. The recording time length 308 is information indicating the length of the recorded time. For example, in the case of the recorded program record 300 in which the program ID 301 is 1, it indicates that the recording is started at 12:00 and the recording for one hour is performed. The recording time length 308 may record the time when the recording is finished.

The offset time 310 defines the time at which playback must be guaranteed from the playback start instruction position from the application. For example, in the recorded program record 300 in which the program ID 301 is 1, when the playback start instruction position is 12:15, the recorded program has a 30-second video from 12:15:00 to 12:15:30. Recording without interruption is a condition for starting playback.

In the present embodiment, the offset time 310 will be described as being generated in program units by the video recording / playback device 100 at the end of recording of a broadcast program. The offset time 310 is determined based on information such as, for example, the genre of the recorded program or the recording time length. The explanation will proceed assuming that the offset time 310 is in seconds, but the resolution may be any degree. That is, it may be in minutes or in milliseconds.

Further, the offset time 310 may be acquired from the application side without being determined by the video recording / playback device 100. Further, the offset time 310 may be generated not for each program but for each video scene, or a uniform time may be set in the video recording / playback device 100.

The information obtained by combining the broadcast date information 302, NID303, CID304, TS_ID305, the recording start time information 307, and the recording time length 308 is information that can uniquely identify the broadcast program. In the present embodiment, the information combining these is defined as the program identification information. In the video recording / playback device 100, the recorded program can be specified by using only the program ID 301, but the application provided from the outside cannot know the program ID 301. Therefore, the application can know whether or not the recorded program exists by determining whether or not the recorded program exists in the video recording / playback device 100 by using the program identification information.

FIG. 4 is a diagram showing recorded program record editing information. The recorded program record editing information 141 is divided and managed for each recorded program, and as shown in FIG. 4, the information corresponding to one recorded program is referred to as a reproduction control record 400. The reproduction control record 400 corresponds to the recorded program record 300 in a ratio of 1: 1 and is associated with the program ID 301. In the present embodiment, the description will proceed assuming that the recorded program record 300 and the playback control record 400 are recorded separately, but these information may be recorded together or further subdivided and recorded. Needless to say, it's good.

The reproduction control record 400 is composed of a program ID 301, a program title information 306, a simple information edit flag 401, a reproduction time edit flag 402, an input source reliability flag 403, a program recording state 404, and a broadcast section information 405.

In the general video recording / playback device 100, various edits can be made to the recorded program. For example, editing operations such as "program name change", "program protection / cancellation", "program division", and "program partial deletion" can be performed.

The "program name change" is to change the name of the program title information 306. "Program protection / release" is a protection setting / release setting that prevents the program from being inadvertently deleted. The "program division" is to divide a recorded program into two in the middle of the recorded program. "Program division" means, for example, the user manually determines the recording start position and the recording end position. If the recorded program recorded by manual recording includes two broadcast programs, the program is divided at the program boundary position. It is used to play back programs in units of. "Delete program portion" is a function for deleting a part of a recorded program, and is used, for example, when it is desired to remove a CM section from a recorded program or to configure only one's favorite video scene as one program.

The simple information editing flag 401 is information indicating whether or not an editing operation that does not affect the total playback time of the program has been performed even after editing, such as "program name change" and "program protection / cancellation". In FIG. 4, the part where the simple information editing flag 401 is indicated by ◯ indicates that the simple information editing has been performed. On the other hand, the part indicated by x indicates that the simple information editing has not been performed.

The playback time edit flag 402 is information indicating whether or not editing has been performed such that the total recording time of the recorded program is changed, such as “program division” and “program partial deletion”. In FIG. 4, the part where the reproduction time editing flag 402 is indicated by ◯ indicates that the editing has been performed. On the other hand, the part indicated by x indicates that the editing has not been performed.

The input source reliability flag 403 is information indicating whether or not the recorded program is formed from a reliable input source when the program is recorded. The information acquired when the broadcast wave is received by the video recording / playback device 100 and the broadcast program is recorded is obtained directly from the broadcast wave, and is not tampered with by a third party, so it is a reliable input source. be. On the other hand, with respect to a program recorded from a network or a recording medium, there is a high possibility that the data has been tampered with by a third party on a general-purpose PC or the like, and the program information cannot be trusted. In FIG. 4, the part where the input source reliability flag 403 is indicated by ◯ indicates that the program was recorded from the broadcast wave. On the other hand, the part indicated by x indicates that the program is a recorded program recorded from an external recording medium or a network.

The program recording state 404 indicates a state when a broadcast wave is recorded. Basically, when a reservation is made via the electronic program guide of the video recording / playback device 100, the entire section from the start time to the end time of the broadcast program is recorded. In this case, the recording time configuration is either Case A (recorded program 210) or Case B (recorded program 220) shown in FIG. In these cases, x is set in the program recording state 404. On the other hand, in the case of Case C (recorded program 230), Case D (recorded program 240), Case E (recorded program 250), Case F (recorded program 260), etc., from the start of the broadcast program at the time of program recording. Since the entire section up to the end point has not been recorded, ◯ is set in the program recording state 404.

The broadcast section information 405 is information indicating a broadcast section that is continuously recorded in the recording stream of the recorded program. When the entire section from the start time to the end time of the broadcast program is recorded, 〇 (the broadcast section is one section and has the relevant information) is set. If there are three broadcast sections due to the deletion of the program part in the middle, as in Case F (recorded program 260), ◎ (there are two or more broadcast sections and the information is available). ) Is set. Further, when the broadcast section information 405 itself is not possessed, such as when dubbing from an external medium, x is set.

FIG. 5 is a diagram showing the syntax of the broadcast section information 405. As shown in FIG. 5, the total number of broadcast recording sections is recorded in "num_of_RecSection 501". The next loop statement (for or less) is repeated as many times as "num_of_RecSection 501". Then, "Start_PTS510", "End_PTS511", "Start_RecSection_DateTime520", and "End_RecSection_DateTime521" are recorded for each broadcast recording section.

“Start_PTS510” indicates the “relative recording start time of the broadcast recording section” based on the recording start time of the broadcast program, and “End_PTS511” indicates the “relative recording end time of the broadcast recording section”. The video recording / playback device 100 performs playback control on the time axis of this relative time. On the other hand, "Start_RecSection_DateTime520" indicates the "absolute recording start time of the broadcast recording section" which is the time axis of the broadcast date and time, and "End_RecSection_DateTime521" indicates the "absolute recording end time of the broadcast recording section".

Specifically, the recorded program of Case F (recorded program 260) in FIG. 2 will be described as an example. In this case, since there are three broadcast recording sections, 3 is set in "num_of_RecSection 501". And in the first broadcast recording section, "Start_PTS510" is 00:00, "End_PTS511" is 00:05, "Start_RecSection_DateTime520" is December 24, 2018 20:00, and "End_RecSection_DateTime521" is December 24, 2018. 20:05 is recorded.

Next, in the second broadcast recording section, "Start_PTS510" is 00:05, "End_PTS511" is 00:25, "Start_RecSection_DateTime520" is December 24, 2018 20:15, and "End_RecSection_DateTime521" is December 24, 2018. Day 20:35 is recorded.

Finally, in the third broadcast recording section, "Start_PTS510" is 00:25, "End_PTS511" is 00:40, "Start_RecSection_DateTime520" is December 24, 2018 20:45, and "End_RecSection_DateTime521" is December 24, 2018. 21:00 on the day is recorded.

By using the broadcast section information 405 in this way, the time axis of the recorded program can be linked to the absolute time of the broadcast date and time, so that the playback control of the recorded program by the absolute time using the time axis of the broadcast date and time can be controlled. Can be done.

Although "Start_PTS510" and "End_PTS511" are described as an example in which the recording start time of the broadcast program is set to 0, they may have a predetermined offset value and the time given to the recording stream. Information (eg PTS) may be used.

FIG. 6 is a diagram showing a display example of the electronic program guide 600 displayed by the application. FIG. 6 shows an example of displaying past, present, and future program guides. A typical electronic program guide only displays current and future program listings. The electronic program guide 600 provided by this application displays the past program guide including the past program guide, and the application acquires the program information including the past program information via the Internet. It should be noted that the program of the past program acquired from the broadcast wave may be accumulated in the video recording / playback device 100, and the past program guide may be formed by using the program information.

The electronic program guide 600 is composed of a program column display area 601 and a program column start time display area 602. As shown in FIG. 6, in the program column display area 601, the channel axis 603 indicating each channel name is displayed on the horizontal axis, and the time axis 604 indicating the broadcast time is displayed on the vertical axis. A program frame corresponding to the broadcast time of each program is displayed at a predetermined position defined in this two dimension, and a title name is displayed in each program frame. Further, the program column display area 601 has a network type display area 605 indicating the network type of the displayed program guide. In the network type display area 605, a broadcasting network type such as "BS", "CS1", or "terrestrial digital" is shown.

Further, in the electronic program guide 600, a highlight frame 610 that assists the user in the program selection operation is also superimposed and displayed. Note that FIG. 6 shows a display example when 3 channels are displayed for 3 hours. The operation unit 130 (see FIG. 1) is provided with buttons such as an up arrow key, a down arrow key, a left arrow key, a right arrow key, and an enter key. The position of the highlight frame 610 is moved in program units by pressing the up / down / left / right keys from the operation unit 130. After that, the program is selected by pressing the enter key from the operation unit 130.

Further, the current time display bar 611 indicating the current date and time is superimposed and displayed on the electronic program guide 600. In the example of Channel 4 shown in FIG. 6, "News ◆ 11" is currently being broadcast, "Waratte Iitomo!" And "Tuesday Wide" have been broadcast in the past, "English Conversation: Listening in English" and " "From the Japanese train window" indicates that the program is scheduled to be broadcast in the future.

FIG. 7 is a diagram showing an example of the past program reproduction screen 700 displayed by the application. When a past broadcast program is selected and the playback position of the program can be controlled, the application outputs the screen configuration shown in FIG. 7 to the display unit 115. The past program reproduction screen 700 is composed of a past program reproduction area 701, a scene list area 702, and a past program information area 703.

The conventional broadcast communication cooperation service had the same screen configuration. The difference is that the reproduced video is not a broadcast viewing program but a recorded program, and that a function using playback position control is provided. Using this function, the playback position of the recorded program can be changed according to the list information of the chapter positions held in the application.

The past program reproduction area 701 is an area for reproducing a program selected in the electronic program guide 600. The reproduced video is scaled and displayed so that it can be displayed in the past program reproduction area 701. The scene list area 702 is an area for acquiring chapter list information of recommended scenes related to recorded programs held by the application and displaying the chapter list information. In the scene list area 702, the scene highlight frame is moved by the up and down keys from the operation unit 130, and the scene is selected by the enter key. When a scene is selected, the recorded program is played from the playback position of the scene.

The acquired chapter list information is basically displayed as list information based on the time position from the start of the program, but internally, the application controls the playback position in absolute time. For example, when an editing operation that affects the playback time is performed on a recorded program, the relative playback position described in the list information and the playback position of the recorded program are inconsistent, so that each scene Then, the reproduction position is controlled by the absolute time which is the broadcast time information. Therefore, when the search is performed by absolute time, if the video scene does not exist, the user may be confused and a misunderstanding that the device is defective may occur. Prevent problems before they happen.

In addition, the past program information area 703 displays, for example, performer information related to a recorded program, browses a synopsis of a previously broadcast program when the recorded program is a series program, or is previously broadcast. This is an area for instructing the distribution of programs.

In the scene list area 702 and the past program information area 703, the graphics generation unit 113 generates a screen based on the information acquired by the application, and the video mixing unit 114 outputs the recorded video from the video decoder unit 111. This is the area that is displayed superimposed on the playback image of the program.

FIG. 8 is a diagram showing a warning screen 800 displayed when the application cannot normally perform playback position control on the recorded program in the video recording / playback device 100. As shown in FIG. 8, after displaying this screen for a predetermined time, the screen returns to the past program playback screen 700. The warning screen 800 may display the cause display area 803, which is an area for displaying the cause of the failure to correctly perform the reproduction position control.

Next, the execution operation flow of the application will be described. FIG. 9 is a diagram showing an execution operation flow of the application.

As shown in FIG. 9, the application is started when the user presses a dedicated button on the operation unit 130. After that, the application displays the electronic program guide 600 shown in FIG. 6 (step S101). The application selects a program based on an instruction from the operation unit 130 (step S102). When a program is selected, the application determines whether the program is a future program with respect to the current time (step S103). When the application determines that the program is a future program (YES in step S103), the electronic program guide 600 is hidden, the program recording reservation of the program is executed (step S104), and the operation is terminated.

If it is not a future program (NO in step S103), the application transitions to step S105 to determine if the selected program is currently being broadcast. When the application determines that the program is currently being broadcast (YES in step S105), the application proceeds to step S106, hides the electronic program guide 600, and selects and displays the electronic program guide 600. If the application determines in step S105 that it is not the current program (NO in step S105), it determines that the selected program is a past program (S107). After that, the application executes the past program reproduction process described later (S108).

In the present embodiment, the application is started by the dedicated button, but the application associated with the program may be started automatically, or the application may be started on condition that a specific event has occurred. It doesn't matter.

Next, the past program reproduction process will be described. FIG. 10 is a diagram showing an operation flow of the past program reproduction process.

As shown in FIG. 10, when the past program is selected, the application acquires the program identification information from the recorded program management unit 124 (step S201). Then, the application acquires the program identification information regarding the selected program in the electronic program guide 600, and determines whether or not the program identification information matches the program identification information of the recorded program acquired from the recorded program information 140. Determines whether or not can be identified as a recorded program (step S202). If it can be identified as a recorded program (YES in step S202), the application transitions to step S203. If it cannot be specified as a recorded program (NO in step S202), the application notifies the user that it is not a recorded program (step S204), and the playback process is not performed.

In step S203, the application determines whether or not the currently recorded program can be played back. Specifically, the application determines whether or not the recording medium in the video recording / playback device 100 is broken or the recorded program can be played back due to simultaneous operation restrictions. If the program can be played back as a recorded program (YES in step S203), the application transitions to step S205. However, if it cannot be played back as a recorded program (NO in step S203), the application notifies the user that the recorded program cannot be played back (step S206), and does not perform the playback process.

In step S205, the application acquires the broadcast section information 405 related to the recorded program, and also acquires the program reproduction start position information included in the reproduction start request acquired via the Internet (step S207). Then, the application determines whether or not the playback start request is section information, that is, whether or not both the playback start time and the playback end time are defined in the program playback start position information (step S208). Here, the program playback start position information included in the playback start request corresponds to the designated time.

When both are defined (YES in step S208), the application indicates whether or not one broadcast section information 405 includes a playback start request section, that is, one broadcast section information 405 includes a playback start time. It is determined whether or not both the playback end times are included (step S209). If both are included (YES in step S209), the application plays the recorded program based on the playback start request (step S210). However, if both are not included (NO in step S209), the application notifies the user that the acquired playback start request section is not the desired video scene and cannot be played back, and ends (step S211). ..

If only the playback start time is defined in the program playback start position information of the acquired playback start request in step S208 (NO in step S208), the application transitions to step S212. In step S212, the application generates section information obtained by adding the offset time 310 to the playback start time of the recorded program, transitions to step S209, and continues the process. If the offset time is not defined or 0 is set as the offset time, in step S209, only whether or not the playback start time is included in the broadcast section information 405 is determined.

As described above, the video recording / playback device 100 according to the embodiment is the recording program management unit 124 that manages the recorded program information 140 recorded in the video recording / playback device 100, and the application acquired from the broadcast communication cooperation service. The recorded program information 140, which includes an application execution unit 126 for executing the above and is managed by the recorded program management unit 124, is continuously recorded in the program identification information for identifying the recorded program and the recording stream of the recorded program. The application executed by the application execution unit 126, including the broadcast section information 405 indicating the broadcast section, determines whether or not the program is a recorded program in the video recording / playback device 100 based on the program identification information, and determines whether the recorded program is a recorded program. If this is the case, it is determined based on the broadcast section information 405 whether or not playback is possible from the time indicated in the program playback start position information, which is the acquired specified time, and it is determined that playback is possible. If this is the case, the recorded program is played from the time indicated in the program playback start position information, and if it is determined that playback is impossible, the recorded program is not played from the time indicated in the program playback start position information.

Therefore, if the application cannot normally control the playback position when the recorded program is linked with the broadcast communication cooperation service, the recorded program should not be played from the time indicated in the program playback start position information. Can be done.

Further, by notifying the user that the application cannot be played back by the warning screen 800 or the like, the user can easily know that the playback position control cannot be performed normally only by glancing at the warning screen 800. Can be done. As a result, the possibility that the user performs unnecessary operations can be reduced. In this way, since it is possible to know in advance whether or not the playback position control can be normally performed for the recorded program, the user is confused due to the failure to normally perform the playback position control. Can be prevented.

Since the program identification information includes broadcast date information 302, NID303, CID304, TS_ID305, recording start time information 307, and recording time length 308, the application can uniquely identify the recorded program by using the program identification information. can. Thereby, the application can specify whether or not the recorded program exists in the video recording / playback device 100.

The recorded program information managed by the recorded program management unit further includes an offset time 310 indicating a playback guarantee time when the recorded program starts playback, and the application execution unit 126 includes the program playback start position information acquired from the application. When only the playback start time is defined, it is determined whether or not playback is possible from the program playback start position information by determining whether or not the section from the playback start time to the offset time 310 is included in one broadcast section information. ..

If only the playback start time is defined in the program playback start position information, and the playback start time is the end of the broadcast section information, there is a possibility that a video scene not intended by the application creator will be played immediately after the start of playback. be. By determining whether or not the section from the playback start time to the offset time is included in one broadcast section information, the user can be made to play the minimum necessary section.

When the playback start time and the playback end time are defined in the program playback start position information acquired from the application, the application execution unit 126 includes whether the section from the playback start time to the playback end time is included in one broadcast section information. By determining whether or not it is possible to reproduce from the specified time.

When the playback start time and the playback end time are defined in the program playback start position information, it is possible to determine whether or not playback is possible based on the acquired program playback start position information without being affected by the offset time 310.

Although the present invention has been described in detail, the above description is exemplary in all aspects and the invention is not limited thereto. It is understood that innumerable variations not illustrated can be assumed without departing from the scope of the present invention.

In the present invention, each embodiment can be freely combined, and each embodiment can be appropriately modified or omitted within the scope of the invention.

100 video recording / playback device, 124 recorded program management unit, 126 application execution unit, 140 recorded program information, 302 broadcast date information, 303 NID, 304 CID, 305 TS_ID, 307 recording start time information, 308 recording time length, 310 offset time , 405 Broadcast section information.

Claims (8)

A video recording / playback device (100) capable of recording and playing back a broadcast program.
A recorded program management unit (124) that manages recorded program information (140) recorded in the video recording / playback device (100), and
It is equipped with an application execution unit (126) that executes an application acquired from a broadcast communication cooperation service.
The recorded program information (140) managed by the recorded program management unit (124) includes program identification information that identifies a recorded program and a broadcast section that is continuously recorded in the recording stream of the recorded program. Including the broadcast section information (405) shown
The application executed by the application execution unit (126) determines whether or not it is a recorded program in the video recording / playback device (100) based on the program identification information, and if it is a recorded program, Determines whether or not the acquired designated time can be played back based on the broadcast section information (405), and if it is determined that the recorded program can be played back from the designated time, the recorded program is started from the designated time. A video recording / playback device (100) that does not play back the recorded program from the designated time when it is played back and it is determined that the playback is impossible. The program identification information includes broadcast date information (302), broadcast network information (303), broadcast channel number information (304), transport stream ID (305), recording start time information (307), and recording time length (308). The video recording / playback device (100) according to claim 1. The recorded program information (140) managed by the recorded program management unit (124) further includes an offset time (310) indicating a guaranteed playback time when the recorded program starts playback.
In the application executed by the application execution unit (126), when only the playback start time is defined at the designated time, the broadcast section information in which the section from the playback start time to the offset time (310) is one. The video recording / playback device (100) according to claim 1 or 2, wherein it is determined whether or not the video recording / playback device is included in (405) to determine whether or not playback is possible from the designated time. In the application executed by the application execution unit (126), when the playback start time and the playback end time are defined at the designated time, the section from the playback start time to the playback end time is one broadcast section. The video recording / playback device (100) according to claim 1 or 2, wherein it is determined whether or not the information (405) is included in the information (405) to determine whether or not the playback is possible from the designated time. It is a video recording / playback method using a video recording / playback device (100) capable of recording / playing a broadcast program.
The video recording / playback device (100) is
A recorded program management unit (124) that manages recorded program information (140) recorded in the video recording / playback device (100), and
It is equipped with an application execution unit (126) that executes an application acquired from a broadcast communication cooperation service.
The recorded program information (140) managed by the recorded program management unit (124) includes program identification information that identifies a recorded program and a broadcast section that is continuously recorded in the recording stream of the recorded program. Including the broadcast section information (405) shown
(A) A step of determining whether or not the application executed by the application execution unit (126) is a recorded program in the video recording / playback device (100) based on the program identification information.
(B) When it is determined in the step (a) that the application executed by the application execution unit (126) is a recorded program, from the specified time acquired based on the broadcast section information (405). And the process of determining whether or not it is possible to regenerate
(C) When it is determined in the step (b) that the application executed by the application execution unit (126) can be played back, the recorded program is played back from a specified time and cannot be played back. A video recording / playback method comprising a step of not playing back the recorded program from the designated time when it is determined that there is. The program identification information includes broadcast date information (302), broadcast network information (303), broadcast channel number information (304), transport stream ID (305), recording start time information (307), and recording time length (308). ), The video recording / playback method according to claim 5. The recorded program information (140) managed by the recorded program management unit (124) further includes an offset time (310) indicating a guaranteed playback time when the recorded program starts playback.
The application executed by the application execution unit (126) in the step (b) is a section from the reproduction start time to the offset time (310) when only the reproduction start time is defined at the designated time. The video recording / reproduction method according to claim 5 or 6, wherein it is determined whether or not reproduction is possible from the designated time by determining whether or not is included in one broadcast section information (405). When the reproduction start time and the reproduction end time are defined at the designated time, the application executed by the application execution unit (126) in the step (b) is from the reproduction start time to the reproduction end time. The video recording / playback method according to claim 5 or 6, wherein it is determined whether or not the section is included in one broadcast section information (405) to determine whether or not playback is possible from the designated time.

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