JP6890655B2 - Video playback device and video playback method - Google Patents

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 by a broadcasting station (hereinafter, may be simply referred to as a "program"), a service provider receives an application and distribution content distributed via a telecommunications line such as the Internet, and receives the application and distribution content. A "broadcast communication cooperation service" that can play back a broadcast program and a distributed content in cooperation with each other by executing the application has become widespread. The term "application" as used herein means not native software specialized for each video recording / playback device, but software that operates depending on the execution environment of the video recording / playback device, such as a Java (registered trademark) application or a Web application. pointing. By executing various applications received from the service provider, the video recording / playback device can perform various operations according to each application.

For example, Patent Document 1 below discloses a broadcast program receiving device that realizes a broadcast communication cooperation service that cooperates with a program currently being viewed (broadcast) by executing an application.

Further, in Patent Document 2 below, as an example of the operation model of the program guide control device based on the application, the past, present, and future program guides are displayed in a list, and the user selects the program currently being broadcast from the program guide. In that case, the program is displayed, and when a program to be broadcast in the future (unbroadcast program) is selected, the recording reservation screen of the program is displayed.

Japanese Unexamined Patent Publication No. 2012-257221 (pages 2-3, FIG. 1) Japanese Unexamined Patent Publication No. 2013-115829 (pages 2-4, FIG. 1)

The application that realizes the broadcast communication cooperation service of Patent Document 1 does not consider the correspondence to the recorded program (recorded program). For example, if the application is linked to the program being broadcast in advance, it is easy to acquire the information related to the program being broadcast via the Internet. However, since a general application cannot uniquely identify a recorded program, it is difficult to obtain information related to the recorded program via the Internet.

Further, in Patent Document 2, since the application identifies whether each program in the program guide corresponds to a program that has not been broadcast, a program that is currently being broadcast, or a program that has been broadcast in the past, it has been broadcast in the past. It is not impossible to uniquely identify the recorded programs that have been recorded. However, if the chapter information associated with the recorded program is acquired via the Internet and the playback position control (control to start playback from the specified position) based on the chapter information is performed, a problem may occur. high. This is because the playback position information included in the chapter information acquired via the Internet indicates the elapsed time from the start of broadcasting the program, and therefore does not always match the playback position information of the actual recorded program.

For example, when controlling the playback position of a recorded program recorded 30 minutes after the start of broadcasting of a one-hour broadcast program, if an attempt is made to play the broadcast program from a position 15 minutes after the start of broadcasting based on the playback position information acquired from the Internet. , It will be played back from the position 15 minutes after the start of recording, that is, the position 45 minutes after the start of broadcasting. Therefore, playback from a position specified by the user cannot be performed properly, which may cause confusion for the user or may be mistaken by the user as a failure of the video recording / playback device.

The present invention has been made to solve the above problems, and is a video playback device capable of preventing the occurrence of problems caused by erroneous playback position control for recorded programs. And to provide a video reproduction method.

The video playback device according to the present invention is a video playback device that controls playback of a recorded program by a broadcast communication cooperation application in a broadcast communication cooperation service, and is a recording unit that records the recorded program and playback of the recorded program. It is equipped with a playback unit that executes the playback unit and an application execution unit that controls the playback unit by executing the broadcast communication cooperation application and using the recorded program management information associated with the recorded program. a WEB application as possible out to superimpose information, recorded program management information includes information that can uniquely identify a broadcast program corresponding to the recorded program by using the recording start time information, the broadcast program as the recorded program It is characterized by including information that can determine whether or not it exists and information that indicates whether or not the recorded program is recorded for the entire section.

Further, the video reproduction method according to the present invention is a video reproduction method in which the reproduction control of a recorded program is performed by the broadcast communication cooperation application in the broadcast communication cooperation service, and the broadcast communication cooperation application is executed and linked to the recorded program. The broadcast communication cooperation application can superimpose and display video and information, including a step of controlling the playback of the recorded program and a step of playing the recorded program using the attached recorded program management information. It is a WEB application that can be used, and the recorded program management information can uniquely identify the broadcast program corresponding to the recorded program using the recording start time information and can determine whether or not the broadcast program exists as the recorded program. It is characterized by including information and information indicating whether or not the recorded program is recorded for the entire section.

According to the present invention, it is possible to provide a video recording / playback device and a video playback method capable of preventing the occurrence of problems caused by erroneous playback position control for a recorded program.

It is a block diagram which shows the structure of the video recording / playback apparatus which concerns on Embodiment 1. FIG. It is a figure which shows the composition example of a recorded program. It is a figure which shows the data structure of the recorded program information which concerns on Embodiment 1. FIG. It is a figure which shows the data structure of the recorded program record edit information which concerns on Embodiment 1. FIG. It is a figure which shows an example of the electronic program guide displayed by the broadcasting communication cooperation application which concerns on Embodiment 1. FIG. It is a figure which shows an example of the past program reproduction screen displayed by the broadcast communication cooperation application which concerns on Embodiment 1. FIG. It is a figure which shows an example of the warning screen displayed by the broadcast communication cooperation application which concerns on Embodiment 1. FIG. It is a flowchart which shows the operation of the broadcasting communication cooperation application which concerns on Embodiment 1. It is a flowchart which shows the past program reproduction processing in Embodiment 1. FIG. It is a flowchart which shows the past program reproduction processing in Embodiment 2.

<Embodiment 1>
The first embodiment proposes a video recording / playback device capable of determining whether or not the recorded program can be correctly controlled for playback position before controlling the playback position of the recorded program. In the video recording / playback device of the first embodiment, when the recorded program cannot correctly control the playback position, the video recording / playback device notifies the user of that fact and the cause thereof, or on an external network. It operates to prevent problems caused by erroneous playback position control by acquiring and playing the same program as the recorded program from. Further, these series of operations are controlled by an application executed by the video recording / playback device.

FIG. 1 is a block diagram showing a configuration of a video recording / playback device 100 according to a first embodiment. As shown in FIG. 1, the video recording / playback device 100 includes a decoder block 110, a network interface unit 121, a download data recording unit 122, a memory unit 130, and a system control unit 140 that collectively controls their operations. ing. Further, a display device 150 and an operation unit 160 are connected to the video recording / playback device 100.

The decoder block 110 is a block that functions as a recording / playback unit that records a broadcast program and reproduces a recorded program, and is a tuner unit 111, a stream control unit 112, a recording / playback drive unit 113, a video decoder unit 114, and an audio decoder unit. It includes 115, a graphics generation unit 116, and a video mixing unit 117.

The tuner unit 111 extracts a broadcast signal from a broadcast wave received by an external antenna (not shown) and decodes it into an MPEG-2 transport stream. The stream control unit 112 performs various processes on the MPEG-2 transport stream output by the tuner unit 111.

For example, when the video recording / playback device 100 records a broadcast program, the stream control unit 112 records the program to be recorded in the recording / playback drive unit 113 as stream information in which the encoded video is multiplexed. Hereinafter, the program recorded in the recording / playback drive unit 113 is referred to as a “recorded program”.

When the stream control unit 112 records the recorded program in the recording / playback drive unit 113, in addition to the stream information of the recorded program, the video and audio attribute information related to the coded video stream separated from the stream information, and It also records the playback control information required to control the playback position. The playback control information is information indicating the correspondence between the playback position of the recorded program and the time. The playback position of the recorded program is a value represented by an access unit (usually a GOP (Group Of Picture) unit) of stream information.

When the video recording / playback device 100 reproduces the recorded program recorded in the recording / playback drive unit 113, the stream control unit 112 reads the stream information of the recorded program from the recording / playback drive unit 113, and the stream control unit 112 reads the recorded program from the recording / playback drive unit 113. Is demultiplexed to separate and extract the coded and compressed video stream (for example, MPEG-2 format video stream) and audio stream (for example, AC-3 format audio stream). The video stream acquired by the stream control unit 112 is sent to the video decoder unit 114, and the audio stream is sent to the audio decoder unit 115.

The video decoder unit 114 decodes the video stream acquired by the stream control unit 112 and generates it as a video signal. The graphics generation unit 116 generates image signals corresponding to the warning display generated by the system control unit 140, various graphics generated by the application, and the like. The video mixing unit 117 generates an output video signal by synthesizing (superimposing) the video signal decoded by the video decoder unit 114 and the video signal generated by the graphics generation unit 116. The audio decoder unit 115 decodes the audio stream acquired by the stream control unit 112 to generate an output audio signal.

The output video signal generated by the video mixing unit 117 and the output audio signal generated by the audio decoder unit 115 are input to the display device 150. The display device 150 includes a display unit 151 and an audio output unit 152, and the display unit 151 displays an image corresponding to the output video signal, and the audio output unit 152 outputs an audio corresponding to the output audio signal. Will be done.

Here, the display device 150 is configured to include the display unit 151 and the audio output unit 152, but the audio output unit 152 may be a speaker or the like independent of the display device 150. Further, the display device 150 and the video recording / playback device 100 may be integrally configured to form a display device having a recording / playback function.

The network interface unit 121 is an interface for connecting the video recording / playback device 100 and an external network 170 (Internet or the like). The download data recording unit 122 is a non-volatile recording medium on which information downloaded from the external network 170 is recorded. The download data recording unit 122 may be removable from the video recording / playback device 100, such as a SmartMedia (registered trademark) or a memory card.

The memory unit 130 is a non-volatile recording medium on which recorded program management information associated with each recorded program is recorded, and recorded program information 131 and recorded program record editing information 132 are recorded as recorded program management information. Record. The recorded program information 131 is attribute information of the program generated at the time of recording the program. Further, the recorded program record editing information 132 is information such as an editing history of a recorded program, a program recording state, a recording source, and its reliability. The recorded program record editing information 132 is appropriately updated when the program is recorded, when the recorded program is edited, when the recorded program information 131 is edited, and the like. Details of the recorded program information 131 and the recorded program record editing information 132 will be described later.

The system control unit 140 includes a recorded program management unit 141, a broadcasting service communication unit 142, and an application execution unit 143. Here, the recorded program management unit 141, the broadcasting service communication unit 142, and the application execution unit 143 will be described on the assumption that they are realized by the firmware in the system control unit 140, but they are referred to as the system control unit 140. May be a separate element. For example, the recorded program management unit 141, the broadcasting service communication unit 142, and the application execution unit 143 may be realized by hardware, respectively. Further, the recorded program management unit 141, the broadcasting service communication unit 142, and the application execution unit 143 may be integrated into one block, or conversely, may be further subdivided.

The recorded program management unit 141 manages the recorded program management information recorded in the memory unit 130, that is, the recorded program information 131 and the recorded program record editing information 132. For example, when recording a program (that is, when a new recorded program is recorded in the recording / playback drive unit 113), the recorded program information 131 and the recorded program record editing information 132 corresponding to the program are newly created. Or, when the recorded program or the recorded program information 131 is edited, the recorded program record editing information 132 is updated according to the edited content.

The broadcast service communication unit 142 connects to the external network 170 via the network interface unit 121, and acquires an application or a distributed program from a network server (not shown) as a resource on the external network 170.

The application execution unit 143 is an application execution environment acquired by the broadcasting service communication unit 142. The application acquired by the broadcast communication cooperation service (broadcast communication cooperation application) acquires information about the program played by the decoder block 110 from the network server on the external network 170, or synchronizes with the video of the program to obtain various information and graphics. Can be superimposed and displayed.

The application acquired from the network server and the graphic components handled by the application are recorded in the download data recording unit 122. When the application is executed by the application execution unit 143, the graphics component is sent to the graphics generation unit 116 under the instruction of the application and converted into an appropriate image signal.

Further, the distributed program received from the network server is sequentially supplied from the network interface unit 121 to the stream control unit 112 of the decoder block 110, and is output from the display device 150 by the same processing as the reproduction of the recorded program.

The operation unit 160 is a user interface that accepts user operations on the video recording / playback device 100. The operation unit 160 may be an operation panel arranged on the front panel of the video recording / playback device 100, or may be a remote controller for remotely controlling the video recording / playback device 100. The system control unit 140 of the video recording / playback device 100 interprets the content of the operation performed by the user on the operation unit 160, and controls each element in the video recording / playback device 100 based on the contents. As a result, the video recording / playback device 100 can record and play back a program (stream information) according to the user's request.

FIG. 2 is a diagram showing a configuration example of a recorded program. Considering the broadcast program 200 to be recorded as a reference, before and after the broadcast program 200, there is a preceding program 201 (a program broadcast immediately before the broadcast program 200) in the past direction in terms of time. There is a subsequent program 202 (a program to be broadcast next to the broadcast program 200) in the future direction. Hereinafter, assuming that the broadcast time zone of the broadcast program 200 is from 20:00 to 21:00, how the broadcast program 200 is connected to the recording / playback drive unit 113 of the video recording / playback device 100 after considering recording and editing. It will be explained whether it can be recorded in various modes.

The most common recording method is to make a recording reservation for each program. When a user makes a recording reservation for a broadcast program 200 using the video recording / playback device 100 for each program, and the video recording / playback device 100 records the broadcast program 200 according to the recording reservation (defined as “case A”), the broadcast program 200 The recorded program (case A) 210 recorded from 20:00 to 21:00, which is the entire section of the above, is recorded in the recording / playback drive unit 113.

When recording a digital broadcast, it is difficult to start recording accurately in seconds. This is because the coding / decoding process of the digital broadcast program takes about 1 to 3 seconds, so that the time information included in the broadcast program may be delayed. Therefore, in a general video recording / playback device, in order to reliably record the beginning part of the program and prevent "head chipping" of the program, a few seconds before the start time of the program reserved for recording (this time is It has a "head chipping prevention function" that starts recording from (generally about 1 to 5 seconds, which is called "offset time"). When the video recording / playback device 100 uses the head chipping prevention function to record a broadcast program 200 reserved for recording in program units (defined as “case B”), the last 5 seconds of the preceding program 201 of the broadcast program 200. The recorded program (case B) 220 in which the degree and the entire section of the broadcast program 200 are recorded is recorded in the recording / playback drive unit 113.

In the middle of recording a program according to the recording reservation, the recording may be interrupted due to insufficient capacity of the recording medium or user operation (defined as "case C"). For example, if the recording of the broadcast program 200 is interrupted at 20:45, the recorded program (case C) 230 in which only the portion of the broadcast program 200 from 20:00 to 20:45 is recorded. Is recorded in the recording / playback drive unit 113. When the recorded program (case A) 210 is edited and the latter half thereof is deleted, the edited recorded program (case A) 210 is treated as the recorded program (case C) 230.

If the program is scheduled to be recorded while the program is being broadcast (defined as "case D"), the recording is started from the middle of the program and the recording ends at the same time as the end of the program. For example, when the broadcast program 200 is scheduled to be recorded at 20:15, the recorded program (case D) 240 in which only the portion from 20:15 to 21:00 is recorded is recorded in the recording / playback drive unit 113. To. When the recorded program (case A) 210 is edited and the beginning portion thereof is deleted, the edited recorded program (case A) 210 is treated as the recorded program (case D) 240.

Recording reservations that are not on a program-by-program basis may be made, such as recording reservations that specify the start and end times of recording (timed recording reservations) and recordings that start and end recordings by the user (manual recording). (Defined as "Case E"). For example, when the user makes a time-specified recording reservation from 20:00 to 21:30 and the video recording / playback device 100 records according to the time-specified recording reservation, the first 30 minutes of the broadcast program 200 and the subsequent program. The 90-minute-long recorded program (case E) 250 that was continuously recorded is recorded in the recording / playback drive unit 113.

In some cases, the recorded program recorded in the recording / playback drive unit 113 is edited by deleting (cutting) a part of the recorded program (defined as “case F”). For example, for a recorded program (case A) 210 in which the entire section of the broadcast program 200 is recorded, the user uses the video recording / playback device 100 to start from 20:00 to 20:15 and from 20:45. When editing is performed to delete the part until 20:55, the edited recorded program (Case A) 210 is the part of the broadcast program 200 from 20:15 to 20:45 and the part after 20:55. Is a recorded program (case F) 260 having a length of 35 minutes. Further, even if a part of the program cannot be received due to a temporary radio wave interference or the like and the middle of the program is cut, the recording / playback drive unit 113 receives the recorded program (case F) 260 as a result. It will be recorded.

FIG. 3 is a diagram showing a data structure of recorded program information 131 recorded in the memory unit 130. As described above, the recorded program information 131 is the attribute information of the program generated at the time of recording the program. The recorded program information 131 is managed separately for each recorded program. Hereinafter, the recorded program information 131 corresponding to one recorded program is referred to as "recorded program record 300".

The recorded program record 300 includes program ID 301, broadcast date information 302 indicating the broadcast date (recording date) of the program, NID 303 indicating the broadcast network, CID 304 indicating the broadcast channel number, EID 305 indicating the program, and program title information indicating the program name. It is composed of 306, recording start time information 307 indicating the recording start time, recording time length 308 indicating the length of the recording time, recording rate 309, offset time 310, and recorded program-related URL 311. The program ID 301 is a number assigned by the recorded program management unit 141 in order to identify each recorded program recorded in the recording / playback drive unit 113.

The broadcast date information 302 is information indicating the broadcast date (recording date) of the program corresponding to the recorded program. The NID 303 is information that identifies the type of broadcasting network on which the program was broadcast, such as BS digital broadcasting (BS), CS digital broadcasting (CS1 / CS2), and terrestrial digital broadcasting. The CID 304 indicates the broadcast channel number on which the program was broadcast within the broadcast network specified by the NID 303. EID305 is a number that can uniquely identify the program within the broadcast channel. According to the current broadcasting operation regulations, the EID 305 is defined as information that can uniquely identify each program only for a certain period (for example, one week). In other words, it is necessary to assign a unique value of EID305 to each program broadcast on the same broadcast channel within a certain period, but after that period, the number used as EID305 can be reused. It becomes.

By combining the broadcast date information 302, NID303, CID304, and EID305, it is possible to uniquely identify which broadcast program the recorded program recorded. In the present embodiment, information that combines these (information for uniquely identifying a broadcast program corresponding to a recorded program) is defined as "program identification information". The program identification information does not have to be a combination of a plurality of pieces of information as in this example, and a unique number is superimposed on the broadcast wave throughout the programs of all broadcasting stations, for example, a content ID of a server-type broadcast. The number may be used as program identification information.

The program title information 306 is information indicating the program name of the recorded program. The recording start time information 307 shall indicate the time when the recording actually started, not the broadcast start time of the program. The recording time length 308 is information indicating the length of the recording time. For example, the recording start time information 307 and the recording time length 308 included in the recorded program record 300 whose program ID 301 shown in FIG. 3 is "1" are such that the recorded program corresponding to the recorded program record 300 is from 12:00 to 1. Indicates that it was recorded by recording the time. In addition, instead of the recording time length 308, information indicating the time when the recording ends (recording end time information) may be used (the recording time length can be calculated as the difference between the recording start time and the recording end time).

The recording rate 309 is information that is an index of the recording quality of the recorded program. In the present embodiment, the recording rate 309 is divided into three types of "HIGH", "MID", and "LOW", but it may be further subdivided. In general, a broadcast program has a very large amount of information, so when recording a broadcast program, if the data contained therein is recorded as it is on a recording medium, the recordable time is shortened. Therefore, by re-encoding and recording at a high compression rate, the time that can be recorded on the recording medium can be extended. This re-encoding process is performed by the stream control unit 112.

Note that the quality of a recorded program recorded with a high compression rate deteriorates when it is played back, such as a low resolution of the video and conspicuous block noise. "HIGH" indicates that it was recorded with high quality (low compression rate), "LOW" indicates that it was recorded with low quality (high compression rate), and "MID" indicates "HIGH" and "LOW". It shows that it was recorded with an intermediate quality of.

The offset time 310 is the length of the portion (corresponding to the end of the preceding program) recorded before the program to be recorded by the head chipping prevention function, that is, the actual recording start time and the broadcast start time of the program. It shows the difference. In other words, the offset time 310 is the delay time at the beginning of the program to be recorded with respect to the beginning of the stream information of the recorded program. For example, if the recording of a program that starts broadcasting at 12:00 is started 5 seconds before (11:59:55) by the head chipping prevention function, the value of the offset time 310 is "5 seconds". Become.

The recorded program-related URL 311 is information indicating an address (URL; Uniform Resource Locator) associated with the broadcast program corresponding to the recorded program, and for example, an address for acquiring an application dedicated to each program or distribution content is described. Will be done. The information at this address is superimposed on the broadcast wave of the program. Further, information for acquiring program identification information uniquely indicating the broadcast program may be recorded as the recorded program-related URL 311.

FIG. 4 is a diagram showing a data structure of recorded program record editing information 132 recorded in the memory unit 130. As described above, the recorded program record editing information 132 is information such as the editing history of the recorded program, the program recording status, the recording source and its reliability, and is used when the program is recorded or when the recorded program is edited. It is updated as appropriate when the recorded program information 131 is edited. The recorded program record editing information 132 is managed separately for each recorded program, similarly to the recorded program information 131. Hereinafter, the recorded program record editing information 132 corresponding to one recorded program is referred to as "playback control record 400".

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, and a program recording state 404.

The reproduction control record 400 has a one-to-one correspondence with the recorded program record 300, and both are linked to each other by the program ID 301. That is, a common program ID 301 is attached to the recorded program record 300 and the playback control record 400 corresponding to the same recorded program. The program title information 306 included in the reproduction control record 400 is the same as the program title information 306 of the recorded program record 300. Here, in order to clearly show the correspondence with the recorded program record 300, an example is shown in which the playback control record 400 also includes the same program title information 306 as the recorded program record 300, but the program title information 306 is not necessarily reproduced. It does not have to be included in the control record 400.

The recorded program record 300 and the reproduction control record 400 do not necessarily have to be handled separately, and information summarizing both may be recorded in the memory unit 130. That is, the recorded program information 131 and the recorded program record editing information 132 may be treated as one recorded program management information. On the contrary, they may be further subdivided and recorded in the memory unit 130.

Prior to the explanation of the simple information editing flag 401, the playback time editing flag 402, the input source reliability flag 403, and the program recording state 404, the editing function of the recorded program will be described. The "editing of the recorded program" referred to here includes not only editing the stream information of the recorded program but also editing the attribute information of the recorded program (for example, the content of the recorded program record 300).

A general video recording / playback device in recent years has a function of editing a recorded program, but the video recording / playback device 100 of the first embodiment also has "program name change", "program protection / cancellation", and "program protection / cancellation". It is assumed that it has the editing functions of recorded programs such as "recording rate conversion", "program division", and "delete program part".

The "program name change" is a function for editing the contents of the program title information 306. "Program protection / cancellation" is a function for switching the setting / cancellation of the function of protecting the recorded program from being deleted by the user's carelessness. "Recording rate conversion" is a function of changing the recording rate by performing re-encoding dubbing on a recorded program. Generally, the recording rate is lowered for the purpose of increasing the free space of the recording medium. When the recording rate of the recorded program is changed, the content of the recording rate 309 of the recorded program record 300 (FIG. 3) corresponding to the change is also changed.

"Program division" is a function of dividing a recorded program into two in the middle. This function, for example, when two broadcast programs are included in a recorded program recorded by timed recording reservation or manual recording (case E in FIG. 2), it is divided at the boundary between the two broadcast programs. Then, it is used to enable playback in program units.

"Delete program part" is a function to delete a part of a recorded program. This function is used, for example, when it is desired to delete a commercial (CM) part from a recorded program, or when it is desired to configure only one favorite video scene as one program.

Returning to FIG. 4, the simple information edit flag 401 is an edit that does not affect the total playback time of the recorded program, such as "program name change", "program protection release", and "recording rate conversion" ("simple information"). It is information indicating whether or not (called "editing") has been performed. Simple information editing basically refers to editing the attribute information of the recorded program, not editing the stream information of the recorded program, but since "recording rate conversion" is editing that does not change the total playback time of the program. It is considered to belong to simple information editing. In FIG. 4, the recorded program whose simple information has been edited is given the simple information editing flag 401 of "○", and the recorded program whose simple information has not been edited is given the simple information editing flag 401 of "x". ing.

The playback time edit flag 402 is information indicating whether or not an edit (referred to as "playback time edit") that changes the total playback time of the recorded program has been performed, such as "program division" or "program partial deletion". is there. In FIG. 4, the recorded program whose playback time has been edited is attached with the playback time editing flag 402 of "○", and the recorded program whose playback time has not been edited is attached with the playback time editing flag 402 of "x". ing.

The input source reliability flag 403 is information indicating whether or not the recorded program is generated from a reliable input source. For example, a broadcast wave from a broadcasting station is a highly reliable input source because there is no room for falsification by a third party. Therefore, it is judged that the recorded program consisting of the stream information extracted from the broadcast wave has high reliability of the input source. On the other hand, the information acquired from the external network 170 or other recording medium may have been tampered with by a third party, and cannot be said to be a sufficiently reliable input source. Therefore, it is determined that the reliability of the input source of the recorded program consisting of the stream information acquired from the external network 170 or another recording medium is low. In FIG. 4, the recorded program generated from the stream information extracted from the broadcast wave is attached with the input source reliability flag 403 of “○”, and the recorded program generated from the stream information acquired from the external network 170 or the external recording medium is attached. The program is marked with an "x" input source reliability flag 403.

The program recording state 404 is information indicating the state in which the recorded program was recorded. Specifically, it indicates whether or not the program is a recorded program in which the entire section of the program is recorded in units of programs. For example, when recording is reserved using an electronic program guide, basically, as in the recorded program (case A) 210 or the recorded program (case B) 220 shown in FIG. 2, the program unit and the program A recorded program in which the entire section is recorded is generated. However, when other recording methods or recorded programs are edited, the recorded programs (Case C) 230, the recorded programs (Case D) 240, and the recorded programs (Case E) shown in FIG. 2 are performed. ) 250, and recorded programs (case F) 260, etc., which are recorded programs in which only a part of the program is recorded, or recorded programs recorded across multiple programs (excluding offset time). The program is generated. In FIG. 4, a program recording state 404 of "○" is attached to a recorded program in which the entire section of the program is recorded in a program unit, and a program recording of "x" is attached to a recorded program having other configurations. The state 404 is attached.

In the present embodiment, it is determined whether or not the recorded program can correctly control the playback position based on the playback time edit flag 402 and the program recording state 404. Specifically, it is determined that the playback position control cannot be performed correctly for the recorded program in which the playback time edit flag 402 is “◯” because “playback time edit” is added. Further, it is determined that the playback position control cannot be performed correctly because the recorded program whose program recording state 404 is "x" is not recorded in program units or only a part of the program is recorded. To. Therefore, it is determined that the recorded program in which the reproduction time edit flag 402 is "x" and the program recording state 404 is "◯" can correctly control the reproduction position. Information that can determine whether or not the reproduction position control can be performed correctly in this way is defined as "reproduction position control availability information".

The playback position controllability information may include an input source reliability flag 403 in addition to the playback time edit flag 402 and the program recording state 404. Specifically, it may be determined that the playback position control cannot be performed correctly even for the recorded program whose input source reliability flag 403 is "x" because the stream information or its attribute information may have been tampered with. ..

FIG. 5 is a diagram showing an example of an electronic program guide 500 displayed by an application (broadcast communication cooperation application) acquired by the broadcast communication cooperation service. Only the current and future program guides are displayed in the general electronic program guide, and the program guides (that is, broadcast history) of past programs are not displayed. However, the electronic program guide 500 of the present embodiment shows the past and future program guides. The current and future program guides are displayed.

In order to compose a program guide, information on the broadcast date and time of each program is required. Information on the broadcast date and time of current and future programs can be obtained from the broadcast wave. However, the broadcast wave does not include information on the broadcast date and time of past programs. Information on the broadcast date and time of past programs may be acquired via, for example, an external network 170, or information on the broadcast date and time of each program acquired from the broadcast wave may be stored in the video recording / playback device 100. It may be used as information on the broadcast date and time of past programs.

As shown in FIG. 5, the electronic program guide 500 is composed of a program column display area 501 and a program column start time display area 502. A channel axis 503 indicating each channel is displayed on the horizontal axis of the program column display area 501, and a time axis 504 indicating the broadcast time is displayed on the vertical axis. Then, in the two-dimensional area defined by the channel axis 503 and the time axis 504, a frame in which information such as the title of each program is described is displayed at a position corresponding to the broadcast channel and broadcast time of the program. To. Further, the program column display area 501 is provided with a network type display area 505 that displays the type of broadcasting network (BS, CS1, CS2, terrestrial digital broadcasting, etc.) corresponding to the program guide.

The program column start time display area 502 does not indicate the current date and time, but displays information indicating when the program guide is displayed in the program column display area 501. FIG. 5 shows an example in which a program table for the following three hours is displayed from a program being broadcast on February 15, 2013 at 10:10 pm on three channels. The current date and time is represented by the current time display bar 511 superimposed and displayed on the program column display area 501. The current time display bar 511 of FIG. 5 indicates that the current date and time is 11:15 pm on the same day. That is, in the program schedule of FIG. 5, for example, "News 11" of channel 4 is a program currently being broadcast, "laughing hour" and "Tuesday wide" are programs broadcast in the past, "English conversation: listening in English" and " "Domestic Travel Guide" is a program that will be broadcast in the future.

Further, in the program column display area 501, a highlight frame 510 for the user to select a program is superimposed and displayed. The operation unit 160 is provided with up / down / left / right keys consisting of an "upward" key, an "downward" key, a "leftward" key, and a "rightward" key, and an "enter" key. The program can be selected by operating the left and right keys to move the highlight frame 510 to the frame of the desired program and pressing the enter key.

FIG. 6 is a diagram showing an example of the past program playback screen 600 displayed by the broadcast communication cooperation application. The broadcast communication cooperation application outputs the past program reproduction screen 600 to the display unit 151 when a program broadcasted in the past is selected by the user's operation and it is determined that the program can correctly control the reproduction position. To do.

The main features of the past program playback screen 600 are that the video to be played is not a program being broadcast but a program broadcast in the past (recorded program, etc.), and a scene selection function using playback position control is provided. That is what has been done. The scene selection function is a function that allows a user to select a playback position of a program based on chapter information (a list showing the position of each scene in the program) acquired from the external network 170.

The past program reproduction screen 600 is composed of a past program reproduction area 601, a scene list area 602, and a past program information area 603. The past program reproduction area 601 is an area for displaying the reproduction video of the past program selected from the electronic program guide 500. The video to be reproduced is scaled according to the size of the past program reproduction area 601.

In the scene list area 602, chapter information of the program being played (the program displayed in the past program playback area 601) is displayed. The chapter information is acquired from a specific network server that the broadcast communication cooperation application exists on the external network 170. Further, in the scene list area 602, a scene highlight frame 604 that can be moved by the user using the "upward" key and the "downward" key (up / down key) of the operation unit 160 is superimposed and displayed, and the user can display the scene highlight frame 604. , The scene highlight frame 604 can be moved to a favorite scene by operating the up and down keys, and the scene can be selected by pressing the "Enter" key. When a scene is selected, the playback position jumps to the position of that scene.

Further, in the past program information area 603, when the broadcast communication cooperation application displays the performer information of the program being played, or when the recorded program is a series program, the synopsis up to the previous program or other times This is an area for displaying information (series playback control information) that guides the playback of a program.

The video of the program displayed in the past program playback area 601 is generated by the video decoder unit 114. On the other hand, the images of the scene list area 602 and the past program information area 603 are generated by the graphics generation unit 116 based on the information acquired from the external network 170. By synthesizing them by the video mixing unit 117, the past program reproduction screen 600 is generated.

Generally, in the chapter information that can be acquired from the external network 170, the position of each scene is represented as a time with reference to the beginning of the program. Therefore, in a recorded program whose playback time has been edited or a recorded program that has not been recorded from the beginning of the program, the position in the recorded program and the position indicated by the chapter information are inconsistent. In that case, the playback position control for selecting a scene cannot be performed correctly, and there is a problem that the user is confused or the video recording / playback device is mistaken for a failure. In the video recording / playback device 100 of the present embodiment, whether or not the broadcast communication cooperation application can correctly control the playback position of the recorded program before playing back the recorded program recorded in the recording / playback drive unit 113. If the playback position cannot be controlled correctly, a warning is given to notify the user to avoid the above problem.

FIG. 7 is an example of a warning screen displayed on the display device 150 when the broadcast communication cooperation application determines that the playback position control of the recorded program cannot be performed correctly. The warning screen 700 has a playback instruction button 701 for instructing the reproduction of the recorded program and a search instruction button 702 for instructing to search the same distribution program on the external network 170 without playing the recorded program. doing. The playback instruction button 701 and the search instruction button 702 can be selected by the user selecting either of the "left direction" key and the "right direction" key (left and right keys) and pressing the enter key. Further, the warning screen 700 may be provided with a cause display area 703 for displaying the reason why the reproduction position cannot be controlled as shown in FIG. 7.

When the playback instruction button 701 is selected by the user, the broadcast communication cooperation application controls the video recording / playback device 100 to play back the recorded program whose playback position cannot be controlled correctly. On the other hand, when the search instruction button 702 is selected, the broadcast communication cooperation application controls the video recording / playback device 100, searches the external network 170 for the same distribution program as the recorded program, and sets the recorded program. If the same broadcast program is found, it will be played. Usually, the distributed program provided on the external network 170 can correctly control the playback position, so that the program can be played back with high interactivity.

If the recorded program cannot control the playback position correctly, the warning screen 700 may be omitted and the video recording / playback device 100 may automatically search for the same distribution program. Good. By doing so, the input burden on the user can be reduced.

FIG. 8 is a diagram showing an execution operation flow of the broadcast communication cooperation application according to the first embodiment. The broadcast communication cooperation application is executed by the application execution unit 143 of the system control unit 140. As a method of activating the broadcast communication cooperation application, for example, a method is conceivable in which the operation unit 160 is provided with a dedicated button for activating the broadcast communication cooperation application, and the user presses the button to activate the broadcast communication cooperation application.

When the broadcast communication cooperation application is started, the electronic program guide 500 (FIG. 5) is displayed on the display unit 151 of the display device 150 (step S101). Then, the user operates the operation unit 160 and waits for the program to be selected (step S102).

When a program is selected by the user (YES in step S102), the broadcast communication cooperation application determines whether or not the selected program (selected program) is a future program with respect to the current time (step S103). .. If the selected program is a future program (YES in step S103), the recording reservation of the selected program is executed (step S104), and the electronic program guide 500 is hidden and ended.

If the selected program is not a future program (NO in step S103), the broadcast communication cooperation application determines whether or not the selected program is a program currently being broadcast (step S105). If the program is currently being broadcast (YES in step S105), the broadcast channel of the selected program is selected, and the display of the display unit 151 is switched from the electronic program guide 500 to the video of the selected program (step S106). At this time, the audio output unit 152 outputs the audio of the selected program.

If the selected program is neither a future program nor a current program (NO in step S105), the broadcast communication cooperation application determines that the selected program is a past program (step S107), and replays the past program (past program). (Reproduction process) is executed (step S108).

FIG. 9 is a flowchart showing a past program reproduction process (step S108 in FIG. 8). When the past program playback process is started, the broadcast communication cooperation application identifies the program of each recorded program recorded in the recording / playback drive unit 113 from the recorded program information 131 and the recorded program record editing information 132 of the memory unit 130. Information (broadcast date information 302, NID303, CID304, EID305 shown in FIG. 3) and playback position control availability information (playback time edit flag 402 and program recording state 404 in FIG. 4) are acquired (steps S201 and S202).

Subsequently, the broadcast communication cooperation application corresponds to the selected program by determining the program identification information of the selected program based on the electronic program guide 500 and comparing it with the program identification information of each recorded program acquired in step S201. It is determined whether or not the recorded program exists in the recording / playback drive unit 113 (step S203).

If there is no recorded program corresponding to the selected program (NO in step S203), the broadcast communication cooperation application controls the broadcast service communication unit 142 to connect to a specific network server on the external network 170 (of the network server). The address is held in advance by the video recording / playback device 100). Then, by comparing the program identification information of the selected program with the program identification information of the distributable program on the network server, the distributable program corresponding to the selected program is searched (step S204).

When there is no distributable program corresponding to the selected program (NO in step S204), the broadcast communication cooperation application notifies the user using the display device 150 that the selected program cannot be played (step S205), and the past program. End the playback process.

When the network server has a distributable program corresponding to the selected program (YES in step S204), the broadcast communication cooperation application requests the network server to distribute the distributable program corresponding to the selected program (step S206). .. Then, the distributed program distributed from the network server is decoded by the decoder block 110 and reproduced using the display device 150 (step S207). As a result, the user can watch the selected program (distributed program).

On the other hand, if there is a recorded program corresponding to the selected program (YES in step S203), whether or not the recorded program can correctly control the playback position based on the playback position control availability information acquired in step S202. (Step S208). If the recorded program cannot control the playback position correctly (NO in step S208), the warning screen 700 (FIG. 7) is displayed on the display device 150, and the recorded program is played back as it is, or the selected program is selected. Prompts the user to choose whether to search the network server for the program that can be distributed according to.

When the search on the network server (network search) is selected by the user (YES in step S209), the process proceeds to step S204.

On the other hand, when the user selects to play the recorded program (YES in step S209), the network server is accessed and the chapter information (scene list) of the selected program and the program-related information are acquired based on the program identification information. (Step S210). After that, the past program reproduction screen 600 (FIG. 6) is configured according to the information, and the recorded program is reproduced using the display device 150 (step S211). As described above, in the present embodiment, when the recorded program corresponding to the selected program cannot correctly control the playback position, the recorded program is played back unless the user's permission is obtained. Absent.

Further, even if the recorded program corresponding to the selected program can correctly control the playback position (YES in step S208), the process proceeds to step S210, and the broadcast communication cooperation application acquires chapter information and the like from the network server. Then, the recorded program is reproduced using the display device 150 (step S211).

When controlling the playback position of the recorded program on the past program playback screen 600, it is desirable to determine the playback position in consideration of the offset time. For example, in a recorded program having an offset time of 5 seconds, if the position of 1 minute and 30 seconds from the beginning of the program is to be reproduced, the position of 1 minute and 35 seconds from the beginning of the actual recorded program may be reproduced. Thereby, more accurate reproduction position control can be performed.

According to the first embodiment, when the broadcast communication cooperation application links the recorded program and the broadcast communication cooperation service, it is possible to determine in advance whether or not the recorded program can correctly control the playback position. it can. As a result, it is possible to prevent problems caused by erroneous playback position control of the recorded program.

For example, by notifying the user through a warning screen that the recorded program corresponding to the program selected by the user (selected program) cannot control the playback position correctly, the user can perform unnecessary operations. Can be prevented. Further, by notifying the reason why the playback position control cannot be performed correctly, it is possible to prevent the user from being confused or misunderstanding that the video recording / playback device 100 is out of order.

In addition, when the recorded program corresponding to the selected program cannot control the playback position, the broadcast communication cooperation application automatically searches the network server on the external network 170 for the same distributable program. It is also possible to play a broadcast program instead of a recorded program. Usually, the distributed program provided on the external network 170 can correctly control the playback position, so that the program can be played back with high interactivity. In addition, it is possible to reduce the time and effort of the user for searching for a distributable program, and to obtain a highly convenient video recording / playback device 100.

In the above description, an example is shown in which the user operates the operation unit 160 to start the broadcast communication cooperation application, but the method of starting the broadcast communication cooperation application may be arbitrary. For example, it may be automatically activated on condition that a specific event has occurred.

Further, in the above example, an example is shown in which the same broadcast communication cooperation application performs a series of processes from the display of the electronic program guide to the reproduction of the selected program. For example, a general-purpose broadcast communication cooperation application uses the electronic program guide. Is displayed, and when a program is selected, the broadcast communication cooperation application associated with the program may be activated. As a result, it becomes possible to provide a fine-tuned broadcast communication cooperation service according to the selected program.

<Embodiment 2>
In the second embodiment, even if the recorded program can correctly control the playback position, if the recording quality is extremely poor, the video recording / playback device 100 that reproduces the same distribution program instead of the recorded program is proposed. To do.

FIG. 10 is a flowchart showing a past program reproduction process according to the second embodiment. Since the steps in which the same processing as the past program reproduction processing (FIG. 9) of the first embodiment is performed are designated by the same reference numerals, the steps different from those in FIG. 9 will be mainly described below. The configuration of the video recording / playback device 100 and the operation of the broadcast communication cooperation application excluding the past program playback processing are the same as those in the first embodiment.

First, in the past program playback process of the second embodiment, the broadcast communication cooperation application uses the recorded program information 131 and the recorded program record editing information 132 of the memory unit 130 to record each recorded program recorded in the recording / playback drive unit 113. The program identification information and the playback position controllability information of the above are acquired (steps S201 and S202), and the recording rate 309 is acquired from the recorded program information 131 (step S301). Subsequent processes in steps S203 to S209 are the same as in the first embodiment.

When the recorded program corresponding to the selected program can correctly control the playback position (YES in step S208), or when the user selects the playback even if the playback position cannot be controlled correctly (YES in step S208). NO) in step S209 proceeds to step S210 as in the first embodiment, and the broadcast communication cooperation application acquires chapter information of the selected program from the network server, but in the second embodiment, after step S210. The following processing is performed.

That is, after step S210, the broadcast communication cooperation application searches the network server for the distributable program corresponding to the selected program, and acquires the recording rate information (step S302). Then, the recording rate 309 of the recorded program corresponding to the selected program acquired in step S301 is compared with the recording rate of the distributable program corresponding to the selectable program acquired in step S302, and which recording quality is higher. (Step S303).

If the recording rate of the recorded program is higher, the process proceeds to step S211 and the recorded program corresponding to the selected program is played back. On the other hand, when the recording rate of the distributable program is higher, the process proceeds to step S206, and the replay of the distributed program corresponding to the selected program is executed.

If the external network 170 cannot be accessed in step S302, or if there is no distributable program corresponding to the selected program on the network server, the process proceeds to step S211 to obtain the recorded program corresponding to the selected program. Playback is performed.

According to the video recording / playback device 100 of the second embodiment, the higher recording quality of the recorded program and the distributable program corresponding to the selected program is played back, so that the selected program can be played with higher quality. The effect of being able to reproduce is obtained.

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, 110 decoder block, 111 tuner section, 112 stream control section, 113 recording / playback drive section, 114 video decoder section, 115 audio decoder section, 116 graphics generator section, 117 video mixing section, 121 network interface section. , 122 Download data recording unit, 130 Memory unit, 140 System control unit, 141 Recorded program management unit, 142 Broadcast service communication unit, 143 Application execution unit, 131 Recorded program information, 132 Recorded program record editing information, 150 Display device, 151 Display, 152 Audio output, 160 Operation, 170 External network, 200 Broadcast program, 201 Preceding program, 202 Subsequent program, 210, 220, 230, 240, 250, 260 Recorded program, 300 Recorded program record, 301 program ID, 302 Broadcast date information, 303 NID, 304 CID, 305 EID, 306 Program title information, 307 Recording start time information, 308 Recording time length, 309 Recording rate, 310 Offset time, 311 Recording program related URL, 400 Playback control record , 401 Simple information edit flag, 402 Playback time edit flag, 403 Input source reliability flag, 404 Program recording status, 500 Electronic program guide, 501 Program column display area, 502 Program column start time display area, 503 Channel axis, 504 hours Axis, 505 network type display area, 510 highlight frame, 511 current time display bar, 600 past program playback screen, 601 past program playback area, 602 scene list area, 603 past program information area, 604 scene highlight frame, 700 warning Screen, 701 playback instruction button, 702 search instruction button, 703 cause display area.

Claims (2)

In the broadcast communication cooperation service, it is a video playback device that controls the playback of recorded programs by the broadcast communication cooperation application.
A recording unit that records the recorded program and
A playback unit that plays back the recorded program,
It is provided with an application execution unit that executes the broadcast communication cooperation application and controls the playback unit by using the recorded program management information associated with the recorded program.
The network-linked digital terrestrial television broadcasting applications is a WEB application as possible out to superimpose images and information,
The recorded program management information includes information that can uniquely identify a broadcast program corresponding to the recorded program by using the recording start time information, and information that can determine whether or not the broadcast program exists as the recorded program. , A video reproduction device including information indicating whether or not the recorded program is recorded for the entire section. In the broadcast communication cooperation service, it is a video playback method that controls the playback of recorded programs by the broadcast communication cooperation application.
A step of executing the broadcast communication cooperation application and controlling the reproduction of the recorded program by using the recorded program management information associated with the recorded program.
It is provided with a step of playing back the recorded program.
The network-linked digital terrestrial television broadcasting applications is a WEB application as possible out to superimpose images and information,
The recorded program management information includes information that can uniquely identify a broadcast program corresponding to the recorded program by using the recording start time information, and information that can determine whether or not the broadcast program exists as the recorded program. , A video reproduction method including information indicating whether or not the recorded program is recorded for the entire section.

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