JP2015133535A - Video record reproduction apparatus and video record reproduction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video record reproduction apparatus capable of preventing occurrence of a problem caused by performing erroneous reproduction position control on an already recorded program.SOLUTION: A video record reproduction apparatus 100 manages recorded program management information (recorded program information 131 and recorded program recording editing information 132) associated with an already recorded program. The recorded program management information includes reproduction position control propriety information for making it possible to determine whether or not correct reproduction position control can be performed on each already recorded program recorded in a record reproduction drive unit 113. A system control unit 140, before reproducing an already recorded program, determines whether or not correct reproduction position control can be performed on the already recorded program on the basis of the reproduction position control propriety information; and, when it is determined that the correct reproduction position control cannot be performed, notifies a user of the determination.

Description

  The present invention relates to a video recording / reproducing apparatus and a video recording / reproducing method.

  In recent years, while watching broadcast programs broadcasted by broadcast stations (hereinafter sometimes simply referred to as “programs”), service providers receive applications and distribution contents distributed via telecommunication lines such as the Internet, A “broadcast communication cooperation service” that allows a broadcast program and distributed content to be played back in cooperation by executing the application has become widespread. The “application” here is not native software specialized for each video recording / reproducing device, but is an application that operates in an execution environment provided in the video recording / reproducing device, such as a Java (registered trademark) application or a Web application. pointing. The video recording / playback apparatus can perform various operations according to each application by executing various applications received from the service provider.

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

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

JP 2012-257221 A (page 2-3, FIG. 1) JP 2013-115829 A (page 2-4, FIG. 1)

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

  In Patent Document 2, the application identifies whether each program in the program table corresponds to an unbroadcast program, a currently broadcast program, or a program broadcast in the past. It is not impossible to uniquely identify recorded programs. However, if chapter information associated with a recorded program is acquired via the Internet and playback position control (control to start playback from a 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 broadcast of the program, and does not always match the playback position information of the actual recorded program.

  For example, when performing playback position control for a recorded program recorded 30 minutes after the start of broadcasting a broadcast program of one hour frame, if an attempt is made to play from a position 15 minutes after the start of broadcasting based on playback position information acquired from the Internet. The video is reproduced from a position 15 minutes after the start of recording, that is, a position 45 minutes after the start of broadcasting. For this reason, reproduction from a position designated by the user cannot be performed properly, which may cause confusion for the user or cause the user to misunderstand that the video recording / reproducing apparatus is out of order.

  The present invention has been made to solve the above-described problems, and is capable of preventing the occurrence of problems caused by erroneous playback position control on recorded programs. An object is to provide an apparatus.

  The video recording / playback apparatus according to the present invention manages a recorded / playback unit that generates a recorded program in which a broadcast program is recorded and plays back the recorded program, and recorded program management information associated with the recorded program. A recorded program management unit; and a control unit that controls the operation of the recording / playback unit, wherein the recorded program management information includes program identification information that can uniquely identify a broadcast program corresponding to the recorded program, and the recording Playback position control availability information indicating whether or not the finished program can correctly perform playback position control, and the control unit includes a recorded program corresponding to a selected program that is a program selected from the electronic program guide by the user Based on the program identification information, and if there is a recorded program corresponding to the selected program, it is further determined whether the recorded program can be correctly subjected to playback position control. If it is determined based on the position control availability information and the recorded program can correctly perform the playback position control, the recorded program is played back by the recording / playback unit, and if the recorded program cannot correctly control the playback position. The recorded program may not be played back by the recording / playback unit without the permission of the user.

  The video recording / playback method according to the present invention includes: (a) a step of recording a broadcast program in a video recording / playback device to generate a recorded program; and (b) a video recording / playback device linked to the recorded program. Corresponding to a selected program which is a program selected by the user, and (c) a step of causing the user of the video recording / reproducing apparatus to select a program from an electronic program guide. A step of causing the video recording / reproducing apparatus to reproduce the recorded program, and the recorded program management information includes reproduction position control availability information indicating whether the recorded program can be correctly subjected to reproduction position control. Including, before the step (d), (e) a step of determining whether or not the recorded program corresponding to the selected program can correctly perform the reproduction position control based on the reproduction position control availability information. The step (c) is executed if the recorded program corresponding to the selected program can correctly control the playback position, and if the recorded program corresponding to the selected program cannot correctly control the playback position, the user's step (c) is performed. It is characterized by not being executed without permission.

  According to the present invention, when a recorded program is played back in cooperation with the broadcasting / communication cooperation service, it can be determined in advance whether the recorded program can be correctly played back. For example, before playing a recorded program whose playback position cannot be controlled correctly, it is possible to notify the user that the playback position cannot be controlled or for the reason, thereby preventing user confusion. In addition, when the playback position of the recorded program cannot be controlled, a convenient video recording / playback apparatus can be obtained by searching for and playing the same distributable program as that program from the external network. Normally, a distribution program provided by an external network can be played back, and thus can be played back with high interactivity.

1 is a block diagram showing a configuration of a video recording / reproducing apparatus according to Embodiment 1. FIG. It is a figure which shows the structural example of the recorded program. It is a figure which shows the data structure of the video recording program information which concerns on Embodiment 1. FIG. It is a figure which shows the data structure of the video recording program recording edit information which concerns on Embodiment 1. FIG. It is a figure which shows an example of the electronic program guide which the broadcast communication cooperation application which concerns on Embodiment 1 displays. It is a figure which shows an example of the past program reproduction | regeneration screen which the broadcast communication cooperation application which concerns on Embodiment 1 displays. It is a figure which shows an example of the warning screen which the broadcast communication cooperation application which concerns on Embodiment 1 displays. 6 is a flowchart showing an operation of the broadcast communication cooperative application according to the first embodiment. 4 is a flowchart showing past program reproduction processing in the first embodiment. 10 is a flowchart showing past program reproduction processing in the second embodiment.

<Embodiment 1>
Embodiment 1 proposes a video recording / reproducing apparatus that can determine whether or not a recorded program can be correctly subjected to reproduction position control before performing reproduction position control of the recorded program. In the video recording / playback apparatus according to the first embodiment, when a recorded program cannot perform playback position control correctly, the video recording / playback apparatus notifies the user of the fact and the cause thereof, or on an external network. Thus, the same program as the recorded program is acquired and played back, so that the malfunction caused by the incorrect playback position control is prevented in advance. These series of operations are controlled by an application executed in the video recording / reproducing apparatus.

  FIG. 1 is a block diagram showing a configuration of a video recording / reproducing apparatus 100 according to the first embodiment. As shown in FIG. 1, the video recording / reproducing apparatus 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 comprehensively controls their operations. ing. In addition, a display device 150 and an operation unit 160 are connected to the video recording / reproducing apparatus 100.

  The decoder block 110 is a block that functions as a recording / playback unit that records a broadcast program and plays back a recorded program, and includes 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. 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 from the tuner unit 111.

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

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

  When the video recording / reproducing apparatus 100 reproduces a recorded program recorded in the recording / reproducing drive unit 113, the stream control unit 112 reads the stream information of the recorded program from the recording / reproducing drive unit 113, and Is demultiplexed into a video stream (for example, an MPEG-2 format video stream) and an audio stream (for example, an AC-3 format audio stream) that are encoded and compressed. 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 a video signal. The graphics generation unit 116 generates an image signal corresponding to a warning display generated by the system control unit 140 and various graphics generated by the application. The video mixing unit 117 generates an output video signal obtained by combining (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 and generates 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. The display unit 151 displays video corresponding to the output video signal, and the audio output unit 152 outputs audio corresponding to the output audio signal. Is done.

  Here, the display device 150 includes the display unit 151 and the audio output unit 152. However, the audio output unit 152 may be a speaker or the like independent of the display device 150. Alternatively, the display device 150 and the video recording / playback device 100 may be integrated to form a display device with a recording / playback function.

  The network interface unit 121 is an interface for connecting the video recording / reproducing apparatus 100 to an external network 170 (such as the Internet). 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 / reproducing apparatus 100, such as smart media (registered trademark) or a memory card.

  The memory unit 130 is a non-volatile recording medium in 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. The The recorded program information 131 is attribute information of the program generated when the program is recorded. The recorded program record editing information 132 is information such as an edited history of a recorded program, a program recording state, a recording source, and its reliability. The recorded program recording / editing information 132 is appropriately updated when a program is recorded, when a recorded program is edited, when the recorded program information 131 is edited. 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 broadcast service communication unit 142, and an application execution unit 143. Here, the recorded program management unit 141, the broadcast service communication unit 142, and the application execution unit 143 will be described assuming that they are realized by firmware in the system control unit 140. May be individual elements. For example, the recorded program management unit 141, the broadcast service communication unit 142, and the application execution unit 143 may each be realized by hardware. Further, the recorded program management unit 141, the broadcast 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 recorded program management information recorded in the memory unit 130, that is, recorded program information 131 and recorded program record editing information 132. For example, when a program is recorded (that is, when a new recorded program is recorded in the recording / playback drive unit 113), recorded program information 131 and recorded program record editing information 132 corresponding to the program are newly created. When the recorded program or the recorded program information 131 is edited, the recorded program record editing information 132 is updated according to the editing content.

  The broadcast service communication unit 142 is connected to the external network 170 via the network interface unit 121, and acquires applications and distribution programs from a network server (not shown) as a resource on the external network 170.

  The application execution unit 143 is an execution environment for the application acquired by the broadcast service communication unit 142. An application (broadcast communication cooperation application) acquired by the broadcast communication cooperation service acquires information on a program reproduced by the decoder block 110 from a network server on the external network 170, or various information and graphics in synchronization with the video of the program. Can be displayed in a superimposed manner.

  The application acquired from the network server and the graphic parts 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 and converted into an appropriate image signal under the instruction of the application.

  In addition, the distribution 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 receives user operations on the video recording / reproducing apparatus 100. The operation unit 160 may be an operation panel disposed on the front panel of the video recording / reproducing apparatus 100 or a remote controller for remotely operating the video recording / reproducing apparatus 100. The system control unit 140 of the video recording / reproducing apparatus 100 interprets the contents of the operation performed by the user on the operation unit 160 and controls each element in the video recording / reproducing apparatus 100 based on the interpretation. Thereby, the video recording / reproducing apparatus 100 can record and reproduce a program (stream information) in response to a user request.

  FIG. 2 is a diagram illustrating 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 time, In the future direction, there is a subsequent program 202 (program broadcast next to the broadcast program 200). In the following, it is assumed that the broadcast time zone of the broadcast program 200 is from 20:00 to 21:00, and how the broadcast program 200 is applied to the recording / playback drive unit 113 of the video recording / playback apparatus 100 in consideration of recording and editing. Will be described.

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

  When recording a digital broadcast, it is difficult to start recording accurately in seconds. This is because the encoding / decoding process of a digital broadcast program takes about 1 to 3 seconds, and there is a possibility that the time information included in the broadcast program may be delayed. For this reason, a general video recording / playback apparatus reliably records the beginning of a program and prevents a “head missing” of the program several seconds before the start time of the program reserved for recording (this time is It has a “head missing prevention function” that starts recording from “offset time” (generally about 1 to 5 seconds). When the video recording / reproducing apparatus 100 records the broadcast program 200 reserved for recording in units of programs using the head missing prevention function (defined as “Case B”), the last five 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 a recording reservation, the recording may be interrupted due to a lack of recording medium capacity or a user operation (defined as “Case C”). For example, when 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 / reproducing drive unit 113. When the recorded program (Case A) 210 is edited and the latter half is deleted, the edited recorded program (Case A) 210 is treated as a recorded program (Case C) 230.

  If the program is reserved and recorded while the program is being broadcast (defined as “Case D”), the recording is started from the middle of the program, and the recording is ended simultaneously with the end of the program. For example, if the broadcast program 200 is reserved for recording at 20:15, a 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. The When the above recorded program (Case A) 210 is edited and the beginning portion thereof is deleted, the edited recorded program (Case A) 210 is treated as a recorded program (Case D) 240.

  Recording reservations that are not program units may be made, such as recording reservations that specify the start time and end time of recording (timed recording reservations), and recording that starts and ends recordings by user operation (manual recording). (Defined as “Case E”). For example, when the user makes a time-designated recording reservation from 20:00 to 21:30 and the video recording / playback apparatus 100 performs recording according to the time-designated recording reservation, the broadcast program 200 and the first 30 minutes of the subsequent program The recorded program (Case E) 250 having a length of 90 minutes recorded continuously is recorded in the recording / reproducing drive unit 113.

  There is a case where editing for deleting (cutting) a part of the recorded program recorded in the recording / reproducing drive unit 113 is performed (defined as “case F”). For example, with respect to a recorded program (Case A) 210 in which all sections of the broadcast program 200 are recorded, the user uses the video recording / playback apparatus 100 to start from 20:00 to 20:15 and from 20:45. When editing is performed to delete the portion until 20:55, the edited recorded program (Case A) 210 is the portion of the broadcast program 200 from 20:15 to 20:45 and the portion after 20:55. Becomes a recorded program (Case F) 260 having a length of 35 minutes. In addition, even when a part of a program cannot be received due to a temporary radio wave disturbance or the like, and the middle of the program is cut, the recorded program (case F) 260 is stored in the recording / playback drive unit 113 as a result. Will be recorded.

  FIG. 3 is a diagram showing a data structure of the recorded program information 131 recorded in the memory unit 130. As described above, the recorded program information 131 is attribute information of the program generated when the program is recorded. 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 a “recorded program record 300”.

  The recorded program record 300 includes a 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 name of the program. 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 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 for specifying the type of the broadcast network on which the program is broadcast, such as BS digital broadcast (BS), CS digital broadcast (CS1 / CS2), and terrestrial digital broadcast. The CID 304 indicates a broadcast channel number on which the program is broadcast in the broadcast network specified by the NID 303. The EID 305 is a number that can uniquely identify the program in the broadcast channel. According to the current broadcast operation regulations, the EID 305 is defined as information that can uniquely identify each program only during a certain period (for example, one week). In other words, it is necessary to assign a unique value of EID 305 to each program broadcast on the same broadcast channel within a certain period, but after that period, the number used as EID 305 can be reused. It becomes.

  By combining the broadcast date information 302, NID 303, CID 304, and EID 305, it is possible to uniquely identify which broadcast program the recorded program has been recorded. In the present embodiment, information combining these (information for uniquely identifying a broadcast program corresponding to a recorded program) is defined as “program identification information”. Note that the program identification information does not need to be a combination of a plurality of information as in this example. For example, a unique number is superimposed on the broadcast wave through the programs of all broadcast stations, such as a server-type broadcast content ID. The number may be used as program identification information.

  The program title information 306 is information indicating the program name of the recorded program. It is assumed that the recording start time information 307 indicates not the broadcast start time of the program but the actual recording start time. 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 having the program ID 301 of “1” shown in FIG. 3 are recorded from 12:00 onwards of the recorded program corresponding to the recorded program record 300. It shows that it was recorded by time recording. Instead of the recording time length 308, information (recording end time information) indicating the time at which recording has ended 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 serving as an index of the recording quality of the recorded program. In this embodiment, the recording rate 309 is divided into three types of “HIGH”, “MID”, and “LOW”, but may be further subdivided. In general, a broadcast program has a very large amount of information. Therefore, when recording a broadcast program, if the data included in the broadcast program is recorded on a recording medium as it is, 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 lengthened. This re-encoding process is performed by the stream control unit 112.

  Note that a recorded program recorded at a high compression rate is degraded in quality, such as when the resolution of the video is reduced or when block noise becomes noticeable. “HIGH” indicates that recording was performed with high quality (low compression rate), “LOW” indicates that recording was performed with low quality (high compression rate), and “MID” is “HIGH” and “LOW”. Indicates that the video was recorded at an intermediate quality.

  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 missing prevention function, that is, the actual recording start time and the broadcast start time of the program. Showing the difference. In other words, the offset time 310 is a delay time at the head of the program to be recorded with respect to the head of the stream information of the recorded program. For example, when the recording of a program that starts broadcasting at 12:00 is started from 5 seconds before (11:59:55) by the head missing 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 a broadcast program corresponding to the recorded program. For example, an address for acquiring an application dedicated to each program and distribution content is described. Is done. This address information is superimposed on the broadcast wave of the program. Information for acquiring program identification information uniquely indicating a broadcast program may be recorded as the recorded program-related URL 311.

  FIG. 4 is a diagram showing a data structure of the recorded program recording / editing information 132 recorded in the memory unit 130. As described above, the recorded program record editing information 132 is information such as a recorded program editing history, a program recording state, a recording source and its reliability, and when recording a program, editing a recorded program, It is updated as appropriate when the recorded program information 131 is edited. Similar to the recorded program information 131, the recorded program record editing information 132 is managed separately for each recorded program. Hereinafter, the recorded program record editing information 132 corresponding to one recorded program is referred to as a “reproduction control record 400”.

  The playback control record 400 includes a program ID 301, program title information 306, a simple information editing flag 401, a playback time editing flag 402, an input source reliability flag 403, and a program recording state 404.

  The playback control record 400 has a one-to-one correspondence with the recorded program record 300, and both are linked to each other by a program ID 301. That is, a common program ID 301 is assigned 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 playback 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 in which the reproduction control record 400 includes the same program title information 306 as the recorded program record 300 is shown, but the program title information 306 is not necessarily reproduced. The control record 400 may not be included.

  Note that the recorded program record 300 and the reproduction control record 400 do not necessarily have to be handled separately, and information in which both are collected 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 handled as one recorded program management information. Conversely, they may be further subdivided and recorded in the memory unit 130.

  Prior to the description of the simple information editing flag 401, the reproduction time editing flag 402, the input source reliability flag 403, and the program recording state 404, the recorded program editing function will be described. “Editing of recorded program” here includes not only editing of stream information of the recorded program but also editing of attribute information of the recorded program (for example, contents of the recorded program record 300).

  A general video recording / reproducing apparatus in recent years has an editing function for a recorded program. However, the video recording / reproducing apparatus 100 according to the first embodiment also uses “program name change”, “program protection / cancellation”, “ It is assumed that it has a recorded program editing function such as “recording rate conversion”, “program division”, and “program part deletion”.

  “Change program name” is a function for editing the contents of the program title information 306. “Program protection / cancellation” is a function for switching setting / cancellation of a function for protecting a recorded program from being erased due to carelessness of the user. “Recording rate conversion” is a function for changing the recording rate by performing re-encoding dubbing on a recorded program. In general, the recording rate is lowered for the purpose of increasing the free capacity of the recording medium. When the recording rate of the recorded program is changed, the contents of the recording rate 309 of the corresponding recorded program record 300 (FIG. 3) are also changed.

  “Program division” is a function of dividing a recorded program into two in the middle. This function is, 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), and is divided at the boundary between the two broadcast programs. Thus, it is used to enable reproduction in units of programs.

  “Delete program part” is a function for deleting a part of a recorded program. This function is used, for example, when it is desired to delete a commercial (CM) portion from a recorded program, or when only one favorite video scene is to be left and configured as one program.

  Returning to FIG. 4, the simple information editing flag 401 is edited such as “program name change”, “program protection release”, “recording rate conversion”, which does not affect the total playback time of the recorded program (“simple information”). This is information indicating whether or not “edit” has been performed. Simple information editing basically refers to editing of recorded program attribute information rather than editing of recorded program stream information, but “recording rate conversion” is an editing that does not change the total playback time of the program. It is considered to belong to simple information editing. In FIG. 4, a simple information editing flag 401 of “◯” is attached to a recorded program that has been edited with simple information, and a simple information editing flag 401 of “×” is attached to a recorded program that has not been edited with simple information. ing.

  The reproduction time editing flag 402 is information indicating whether or not editing (referred to as “reproduction time editing”) in which the total reproduction time of the recorded program is changed, such as “program division” or “program part deletion”, has been performed. is there. In FIG. 4, a recorded program whose playback time has been edited is assigned a “○” playback time edit flag 402, and a recorded program that has not been edited for playback time is assigned a “×” playback time edit flag 402. 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 alteration by a third party. Therefore, a recorded program composed of stream information extracted from broadcast waves is determined to have high input source reliability. On the other hand, information acquired from the external network 170 or other recording media may be altered by a third party, and cannot be said to be a sufficiently reliable input source. Therefore, it is determined that the recorded program including the stream information acquired from the external network 170 or another recording medium has low reliability of the input source. 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. The program has a “x” input source reliability flag 403.

  The program recording state 404 is information indicating in what state the recorded program has been recorded. Specifically, it indicates whether the program is a recorded program in which all sections of the program are recorded. For example, when a recording reservation is made using an electronic program guide, basically, the recorded program (Case A) 210 or the recorded program (Case B) 220 shown in FIG. A recorded program in which the entire section is recorded is generated. However, when other recording methods or recorded programs are edited, the recorded program (Case C) 230, recorded program (Case D) 240, recorded program (Case E) shown in FIG. ) 250 and recorded program (Case F) 260, etc., a recorded program in which only a part of the program is recorded, or a recorded program that has been recorded across a plurality of programs (excluding offset time) A program is generated. In FIG. 4, a program recording state 404 of “◯” is attached to a recorded program in which all sections of the program are recorded, and “×” is recorded to a recorded program of any other configuration. A state 404 is attached.

  In the present embodiment, based on the playback time edit flag 402 and the program recording state 404, it is determined whether or not the recorded program can be correctly subjected to playback position control. Specifically, it is determined that the playback position control cannot be correctly performed on a recorded program whose playback time edit flag 402 is “◯” because “playback time editing” is added. In addition, a recorded program whose program recording status 404 is “×” is not recorded in units of programs, or only a part of the program is recorded. The Therefore, it is determined that a recorded program whose reproduction time edit flag 402 is “×” and whose program recording state 404 is “◯” can correctly perform reproduction position control. Information that can be used to determine whether or not playback position control can be performed correctly is defined as “playback position control availability information”.

  The reproduction position control availability information may include an input source reliability flag 403 in addition to the reproduction time edit flag 402 and the program recording state 404. Specifically, a recorded program whose input source reliability flag 403 is “×” may be determined that the playback position control cannot be performed correctly because there is a possibility that the stream information or the attribute information thereof has been falsified. .

  FIG. 5 is a diagram illustrating an example of an electronic program guide 500 displayed by an application (broadcast communication cooperation application) acquired by the broadcast communication cooperation service. In the general electronic program guide, only the current and future program guides are displayed, and the program guide of the past program (that is, the broadcast history) is not displayed. Current and future program guides are displayed.

  In order to construct 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 broadcast waves. 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, for example, via the external network 170, or information on the broadcast date and time of each program acquired from the broadcast wave is stored in the video recording / playback apparatus 100. It may be used as broadcast date information of past programs.

  As shown in FIG. 5, the electronic program guide 500 includes 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. In a two-dimensional area defined by the channel axis 503 and the time axis 504, a frame describing information such as the title of each program is displayed at a position corresponding to the broadcast channel and the broadcast time of the program. The Further, the program column display area 501 is provided with a network type display area 505 for displaying the type of broadcast network (BS, CS1, CS2, terrestrial digital, etc.) corresponding to the program guide.

  The program column start time display area 502 does not indicate the current date and time, but information indicating when the program table is displayed from the program column display area 501 is displayed. FIG. 5 shows an example in which the program table for the next three hours is displayed from the program being broadcast at 10:10 pm on February 15, 2013 on three channels. The current date and time is represented by a current time display bar 511 superimposed on the program column display area 501. The current time display bar 511 in FIG. 5 indicates that the current date and time is 11:15 pm on the same day. In other words, in the program table of FIG. 5, for example, “News 11” on channel 4 is a program currently being broadcast, “Comedy Hour” and “Tuesday Wide” are programs broadcast in the past, “English Conversation: Listening in English” and “ The “Domestic Travel Guide” is a program broadcast in the future.

  Further, a highlight frame 510 for the user to select a program is superimposed on the program column display area 501. The operation unit 160 includes up / down / left / right keys including an “up” key, a “down” key, a “left” key, and a “right” key, and a “decision” key. The program can be selected by operating the left / right key 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 a past program playback screen 600 displayed by the broadcast communication cooperation application. The broadcasting / communication cooperation application outputs a past program playback screen 600 to the display unit 151 when it is determined that a program broadcast in the past is selected by the user's operation and the program can be correctly controlled for playback position. To do.

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

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

  In the scene list area 602, chapter information of a program being reproduced (program displayed in the past program reproduction area 601) is displayed. The chapter information is acquired from a specific network server in which the broadcasting / communication cooperation application exists on the external network 170. In the scene list area 602, a scene highlight frame 604 that can be moved by the user using the “up” key and the “down” key (up / down key) of the operation unit 160 is displayed in a superimposed manner. By operating the up / down key, the scene highlight frame 604 is moved to a desired scene, and the “determine” key is pressed to select the scene. When a scene is selected, the playback position jumps to the position of that scene.

  In addition, the past program information area 603 displays an outline of the previous program and other times when the broadcast communication cooperation application displays the performer information of the program being played back or the recorded program is a series program. This is an area for displaying information (series playback control information) for guiding program playback.

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

  In general, in the chapter information that can be acquired from the external network 170, the position of each scene is represented as a time relative to the beginning of the program. For this reason, 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, there is a mismatch between the position in the recorded program and the position indicated by the chapter information. In such a case, the playback position control for selecting a scene cannot be performed correctly, resulting in a problem that the user is confused or misunderstood as a failure of the video recording / playback apparatus. In the video recording / playback apparatus 100 according to the present embodiment, whether or not the broadcast / communication cooperation application can correctly control the playback position of the recorded program before playing the recorded program recorded in the recording / playback drive unit 113. If the reproduction position control cannot be performed correctly, a warning is sent to notify the user of that fact, thereby avoiding the above problem.

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

  When the user selects the playback instruction button 701, the broadcasting / communication cooperation application controls the video recording / playback apparatus 100 to play back a recorded program that cannot be played back correctly. On the other hand, when the search instruction button 702 is selected, the broadcasting / communication cooperation application controls the video recording / playback apparatus 100 to search the external network 170 for the same distribution program as the recorded program, If the same distribution program is found, it is played. Normally, the distribution program provided on the external network 170 can correctly perform the reproduction position control, so that the program reproduction with high interactivity can be performed.

  If the recorded program cannot be correctly played back, the warning screen 700 is omitted and the video recording / playback apparatus 100 automatically searches for the same distribution program. Good. By doing so, the user's input burden can be reduced.

  FIG. 8 is a diagram showing an execution operation flow of the broadcast communication cooperative 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 for starting the broadcast communication cooperative application, for example, a method for providing a dedicated button for starting the broadcast communication cooperative application in the operation unit 160 and starting the broadcast communication cooperative application by pressing the button is conceivable.

  When the broadcasting / 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). And it waits for a user to operate the operation part 160 and to select a program (step S102).

  When the user selects a program (YES in step S102), the broadcasting / communication cooperation application determines whether 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), recording reservation of the selected program is executed (step S104), and the electronic program guide 500 is hidden and the process ends.

  If the selected program is not a future program (NO in step S103), the broadcast communication cooperative 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 on the display unit 151 is switched from the electronic program table 500 to the video of the selected program (step S106). At this time, the sound output unit 152 outputs the sound of the selected program.

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

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

  Subsequently, the broadcasting / communication cooperation application determines the program identification information of the selected program based on the electronic program guide 500, and compares it with the program identification information of each recorded program acquired in step S201, thereby corresponding to the selected program. It is determined whether or not a recorded program exists in the recording / reproducing drive unit 113 (step S203).

  When there is no recorded program corresponding to the selected program (NO in step S203), the broadcast communication cooperative 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 / reproducing apparatus 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, a 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 cooperative application notifies the user that the selected program cannot be reproduced using the display device 150 (step S205), and the past program The playback process ends.

  If there is a distributable program corresponding to the selected program in the network server (YES in step S204), the broadcast communication cooperative application requests the network server to distribute a distributable program corresponding to the selected program (step S206). . Then, the distribution program distributed from the network server is decoded by the decoder block 110 and reproduced using the display device 150 (step S207). Thereby, the user can view 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 perform the playback position control based on the playback position control availability information acquired in step S202. (Step S208). If the recorded program cannot correctly control the playback position (NO in step S208), a 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 displayed. The user is prompted to select whether to search for a distributable program on the network server.

  If search by 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 playback of the recorded program is selected by the user (YES in step S209), the network server is accessed, and the chapter information (scene list) and program related information of the selected program are acquired based on the program identification information. (Step S210). Thereafter, the past program playback screen 600 (FIG. 6) is configured according to the information, and the recorded program is played back using the display device 150 (step S211). As described above, in this embodiment, when a recorded program corresponding to the selected program cannot be correctly played back, the recorded program is played back unless the user's permission is obtained. Absent.

  Also, if the recorded program corresponding to the selected program can be correctly played back (YES in step S208), the process proceeds to step S210, and the broadcasting / 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).

  In the past program playback screen 600, when the playback position of the recorded program is controlled, 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 1 minute 30 seconds from the beginning of the program is reproduced, the position 1 minute 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 broadcasting / communication cooperation application performs cooperation between the recorded program and the broadcasting / communication cooperation service, it is possible to determine in advance whether or not the recorded program can correctly perform the reproduction position control. it can. As a result, it is possible to prevent problems that occur due to erroneous playback position control of recorded programs.

  For example, by notifying a user through a warning screen that a recorded program corresponding to a program selected by the user (selected program) cannot be correctly played back, the user can perform a useless operation. Can be prevented. Furthermore, if the reason why the playback position control cannot be performed correctly is notified, it is possible to prevent the user from being confused or mistaken for the failure of the video recording / playback apparatus 100.

  When the recorded program corresponding to the selected program cannot be subjected to playback position control, 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 the distribution program instead of the recorded program. Normally, the distribution program provided on the external network 170 can correctly perform the reproduction position control, so that the program reproduction with high interactivity can be performed. Further, it is possible to reduce the user's effort for searching for a distributable program, and to obtain a highly convenient video recording / reproducing apparatus 100.

  In the above description, an example in which the user operates the operation unit 160 to start the broadcast communication cooperative application has been described, but the broadcast communication cooperative application may be activated arbitrarily. For example, it may be automatically started on condition that a specific event has occurred.

  In the above example, the same broadcast communication cooperation application performs a series of processing from the display of the electronic program guide to the reproduction of the selected program. For example, a general-purpose broadcast communication cooperation application is an electronic program guide. When the program is selected and the program is selected, the broadcast communication cooperation application associated with the program may be activated. Thereby, it is possible to provide a fine-tuned broadcasting / communication cooperation service corresponding to the selected program.

<Embodiment 2>
The second embodiment proposes a video recording / reproducing apparatus 100 that reproduces the same distributed program instead of the recorded program if the recorded quality is extremely poor even if the recorded program can be correctly controlled for reproduction position. To do.

  FIG. 10 is a flowchart showing past program reproduction processing according to the second embodiment. Steps in which processing similar to that in the past program reproduction processing (FIG. 9) of the first embodiment is performed are assigned the same reference numerals, and therefore, steps different from those in FIG. 9 will be mainly described below. The configuration of the video recording / playback apparatus 100 and the operation of the broadcast communication cooperative application excluding 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 each recorded program recorded in the recording / playback drive unit 113 from the recorded program information 131 and the recorded program recording / editing information 132 in the memory unit 130. Are acquired (step S201, S202), and the recording rate 309 is acquired from the recorded program information 131 (step S301). Subsequent steps S203 to S209 are the same as those in the first embodiment.

  When the recorded program corresponding to the selected program can correctly control the playback position (YES in step S208), or even if the playback position control cannot be correctly performed, the user selects the playback ( In step S209, the process proceeds to step S210 as in the first embodiment, and the broadcasting / communication cooperation application acquires the chapter information of the selected program from the network server. However, in the second embodiment, after step S210, The following processing is performed.

  That is, after step S210, the broadcasting / communication cooperation application searches for a distributable program corresponding to the selected program from the network server, and acquires information on the recording rate (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, which recording quality is higher. Is determined (step S303).

  When 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, if the recording rate of the distributable program is higher, the process proceeds to step S206, and the distribution program corresponding to the selected program is reproduced.

  If it is determined in step S302 that the external network 170 cannot be accessed or if there is no distributable program corresponding to the selected program on the network server, the process proceeds to step S211 and the recorded program corresponding to the selected program is displayed. Playback is executed.

  According to the video recording / reproducing apparatus 100 of the second embodiment, the recorded program and the distributable program corresponding to the selected program are reproduced, so that the higher recorded quality is reproduced. The effect that it can reproduce | regenerate is acquired.

  It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

  100 video recording / playback apparatus, 110 decoder block, 111 tuner unit, 112 stream control unit, 113 recording / playback drive unit, 114 video decoder unit, 115 audio decoder unit, 116 graphics generation unit, 117 video mixing unit, 121 network interface unit 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 unit 152 Sound output unit 160 Operation unit 170 External network 200 Broadcast program 201 Predecessor program 202 Subsequent program 210, 220, 230, 240, 250, 260 Completed 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 Recorded 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 time 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 Removed by the program information region, 604 the scene highlights frame, 700 a warning screen 701 reproduction instruction button 702 search instruction button 703 causes the display area.

Claims (10)

A recording / playback unit for generating a recorded program in which a broadcast program is recorded and playing back the recorded program;
A recorded program management unit for managing recorded program management information associated with the recorded program;
A control unit for controlling the operation of the recording / playback unit;
With
The recorded program management information includes program identification information that can uniquely identify a broadcast program corresponding to the recorded program, and reproduction position control availability information that indicates whether the recorded program can be correctly subjected to reproduction position control. Including
The controller is
Determining whether or not there is a recorded program corresponding to the selected program that is a program selected by the user from the electronic program guide, based on the program identification information;
If there is a recorded program corresponding to the selected program, it is further determined whether or not the recorded program can be correctly subjected to playback position control based on the playback position control availability information. If the playback position control can be performed correctly, the recorded program is played back by the recording / playback unit. If the recorded program cannot perform playback position control correctly, the recorded program is recorded and played back without the user's permission. The video recording / reproducing apparatus is characterized in that the video recording / reproducing apparatus is not allowed to reproduce. The video recording / reproducing apparatus according to claim 1,
The control unit includes an application execution unit that executes an application acquired by the broadcast communication cooperation service,
The display process of the electronic program guide and a series of processes for determining whether or not the recorded program corresponding to the selected program is to be played back by the recording / playback unit are performed by the application. Video recording / playback device. The video recording / reproducing apparatus according to claim 1 or 2,
It further includes a broadcast service communication unit that can access resources on an external network,
If the recorded program corresponding to the selected program cannot correctly control the playback position, the control unit uses the broadcast service communication unit to send the same program as the selected program to a resource on the external network. The video recording / playback apparatus, wherein the video recording / playback unit plays back the video recording and playback. The video recording / reproducing apparatus according to any one of claims 1 to 3,
The video recording / playback apparatus, wherein the playback position control enable / disable information is determined based on whether or not a recorded program linked to the playback position control has been edited to affect playback time. The video recording / reproducing apparatus according to any one of claims 1 to 4,
The video recording / playback apparatus according to claim 1, wherein the playback position control enable / disable information is determined based on whether or not the recorded program associated with the playback position is recorded as a whole program by reserved recording in units of programs. (A) a step in which the video recording / playback apparatus records a broadcast program to generate a recorded program;
(B) the video recording / playback apparatus creating recorded program management information associated with the recorded program;
(C) letting the user select a program from an electronic program guide by the video recording / playback apparatus;
(D) the video recording / playback apparatus playing back the recorded program corresponding to the selected program that is a program selected by the user,
The recorded program management information includes playback position control availability information indicating whether or not the recorded program can correctly perform playback position control,
Before the step (d),
(E) a step in which the video recording / playback apparatus determines whether or not a recorded program corresponding to the selected program can correctly perform playback position control based on the playback position control availability information;
Is done,
The step (c) is executed if the recorded program corresponding to the selected program can correctly control the playback position, and if the recorded program corresponding to the selected program cannot correctly control the playback position, the user's step (c) is performed. A video recording / reproducing method, which is not executed without permission. The video recording / playback method according to claim 6,
(F) When the recorded program corresponding to the selected program cannot be correctly controlled for playback position, the video recording / playback apparatus acquires it from a resource on an external network instead of performing the step (d). Playing the same program as the selected program,
A video recording / reproducing method, further comprising: The video recording / reproducing method according to claim 6 or 7,
The recorded program management information further includes program identification information capable of uniquely identifying a broadcast program corresponding to the recorded program. (G) The video recording / reproducing apparatus records the recorded program corresponding to the selected program in the video recording. Determining whether or not it exists in the playback device based on the program identification information;
(H) When a recorded program corresponding to the selected program does not exist in the video recording / playback apparatus, the video recording / playback apparatus acquires from a resource on an external network instead of performing the step (d). Playing the same program as the selected program,
A video recording / reproducing method, further comprising: A video recording / reproducing method according to any one of claims 6 to 8,
The video recording / playback method, wherein the playback position control enable / disable information is determined based on whether a recorded program linked to the playback position control has been edited to affect playback time. A video recording / reproducing method according to any one of claims 6 to 9,
The video recording / playback method according to claim 1, wherein the playback position control availability information is determined based on whether or not the recorded program linked to the playback position control is the entire program recorded by reserved recording in units of programs.

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