JP4617062B2 - Video broadcasting method, video broadcasting program, and recording medium - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a video broadcasting method, a video broadcasting program, and a recording medium, and more particularly to a video broadcasting method, a video broadcasting program, and a recording medium using a computer.
[0002]
[Prior art]
In the editing of video broadcast in TV programs, the amount of information is much larger than that of high-quality video (hereinafter referred to as “main broadcast video”) used for actual broadcasting because of the efficiency of the work. In other words, low-quality video (hereinafter referred to as “roughly edited video”) is used (see, for example, Patent Document 1 and Patent Document 2).
[0003]
The use of coarsely edited video for editing work not only improves the efficiency of editing work but also reduces the amount of data when video shot at a remote location is transferred to a broadcasting station via a satellite or micro line. Contribute.
[0004]
That is, a video transmission source at a shooting site or the like generates a coarse edited video including all scenes and a main broadcast video from the shot video, and transmits only the coarse edited video to the broadcasting station. In the broadcasting station, editing work is performed based on the coarsely edited video, and a scene to be used for actual broadcasting is determined. Thereafter, a transmission request for the main broadcast video for only the scene used for the program is sent from the broadcast station to the video transmission source, and the main broadcast video for only the necessary scene is transmitted to the broadcast station. Therefore, transfer of the main broadcast video with a large amount of information can be greatly reduced.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-268505 [0006]
[Patent Document 2]
Japanese Patent Laid-Open No. 2001-346159
[Problems to be solved by the invention]
However, the completion of the editing work may be just before the start of the program. In such a case, even if only necessary scenes are transmitted, the transfer of the main broadcast video is not completed by the start of the broadcast, and the broadcast of the program cannot be started, or the main broadcast video is being broadcast while being sequentially received. In this case, the broadcast content is confused during the program.
[0008]
In particular, recently, BS digital broadcasting has been started, and it is expected that digital video data will be transferred to a broadcasting station via a low-cost line such as an IP network. Since the bandwidth of the IP network is not guaranteed, as described above, it is considered that the problem that the main broadcast video cannot be obtained by the broadcasting time becomes more apparent.
[0009]
The present invention has been made in view of the above points, and can provide a video broadcasting method, a video broadcasting program, and a recording that can appropriately perform broadcasting even when high-quality video used for actual broadcasting cannot be obtained. The purpose is to provide a medium.
[0010]
[Means for Solving the Problems]
Therefore, in order to solve the above-described problem, the present invention is a video broadcasting method for broadcasting video using a computer, and downloads that determine whether the main broadcast video data of a scene to be broadcast is downloaded from a predetermined server When it is determined that the main broadcast video data of the broadcast scene is not downloaded in the situation determination stage and the download situation determination stage, the scene is included in the roughly edited video data used for editing the broadcast scene. And a coarsely edited video data reproduction stage for reproducing the corresponding coarsely edited video data.
[0011]
In such a video broadcasting method, even if the actual broadcast video data used for actual broadcasting cannot be downloaded, the coarsely edited video data is automatically played back, so that the content of the broadcast is appropriately prevented without causing any confusion. Broadcasting is possible.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating a configuration example of a video broadcasting system according to an embodiment of the present invention. In FIG. 1, a video broadcast system 1 includes a video broadcast server 10 and a video buffering server 20 that are connected via an IP (Internet Protocol) network such as the Internet.
[0013]
The video buffering server 20 is a computer installed at a video provider, and has a broadcast video buffering means and the like. The video buffering server 20 takes in unprocessed video data (hereinafter referred to as “material video data”) from the camera 70 that has captured the broadcast video, and uses the material video data for actual TV broadcasting. The video data is encoded into high-quality video data (hereinafter referred to as “main broadcast video data”) and low-quality video data (hereinafter referred to as “roughly edited video data”) used for program editing. The video buffering server 20 immediately transmits the coarsely edited video data to the video broadcast server 10, and stores the main broadcast video data in the main broadcast video buffering means 21.
[0014]
The video broadcast server 10 is a computer installed in a broadcast station that actually broadcasts a TV program. The video broadcast server 10 includes a coarse edited video storage unit 11 and a main broadcast video storage unit 12. The coarse edited video storage unit 11 is a storage area for storing the coarse video data received from the video buffering server 20 by the video broadcast server 10. The main broadcast video storage means 12 is a storage area for storing the main broadcast video data received from the video buffering server 20 by the video broadcast server 10.
[0015]
In addition to the video broadcast server 10, the broadcast station is provided with coarsely edited video playback means 40, a switcher 50, main broadcast video playback means 60, and the like. The coarse edited video reproduction means 40 is a device for reproducing the coarse video data stored in the coarse edited video storage means 11, and the main broadcast video reproduction means 60 is stored in the main broadcast video storage means 12. This is a device for playing back broadcast video data. The switcher 50 is a device connected to the video broadcast server 10 through an interface such as RS232C. The switcher 50 is a device (roughly edited video playback means 40 or main broadcast) that plays back the video actually broadcast according to an instruction from the video broadcast server 10. The video reproduction means 60) is switched.
[0016]
Next, details of the video broadcast server 10 will be described. FIG. 2 is a diagram illustrating a hardware configuration example of the video broadcast server 10 according to the embodiment of the present invention. The video broadcast server 10 of FIG. 2 includes a drive device 100, an auxiliary storage device 102, a memory device 103, an arithmetic processing device 104, and an interface device 105 that are mutually connected by a bus B. Is done.
[0017]
A video broadcast program that realizes processing in the video broadcast server 10 is provided by a recording medium 101 such as a CD-ROM. The recording medium 101 on which the video broadcast program is recorded is set in the drive device 100, and the video broadcast program is installed in the auxiliary storage device 102 from the recording medium 101 via the drive device 100.
[0018]
The auxiliary storage device 102 stores the installed video broadcast program and also stores necessary files and data. For example, the auxiliary storage device 102 stores a table and the like, which will be described later, necessary for processing the video broadcast program. The auxiliary storage device 102 also functions as the coarse video storage unit 11 and the main broadcast video storage unit 12.
[0019]
The memory device 103 reads the video broadcast program from the auxiliary storage device 102 and stores it when there is an instruction to start the video broadcast program. The arithmetic processing unit 104 executes functions related to the video broadcast server 10 in accordance with the video broadcast program stored in the memory device 103. The interface device 105 includes, for example, a modem, a router, etc., and is used to connect to the network 30 in FIG.
[0020]
FIG. 3 is a diagram showing a functional configuration example of the video broadcasting system in the embodiment of the present invention. In FIG. 3, the video buffering server 20 includes a main broadcast video buffering means 21, a video encoding means 22, a coarsely edited video transmission means 23, a main broadcast video transmission means 24, and the like.
[0021]
The video broadcast server 10 includes a coarsely edited video storage unit 11, a main broadcast video storage unit 12, a coarsely edited video reception unit 13, a video management table registration unit 14, a video management table 15, a main broadcast video download unit 16, and a main broadcast. It comprises a video receiving means 17, a video switching means 19 and the like.
[0022]
Note that the function of each means will be described with reference to a flowchart described later.
[0023]
Hereinafter, the processing procedure of the video broadcasting system of FIGS. 1 and 3 will be described.
[0024]
FIG. 4 is a flowchart for explaining the process of taking material video data by the video buffering server.
[0025]
In step S <b> 11, the video encoding unit 22 of the video buffering server 20 takes in the material video data 71 captured by the camera 70. Progressing to step S12 following step S11, the video encoding means 22 automatically detects a scene change (scene change) in the material video data 71, and the material video data 71 is converted into a plurality of video data for each scene (hereinafter, “scene”). Divided into “video data”). Since automatic detection of a scene change is already well known, detailed description thereof is omitted.
[0026]
Progressing to step S13 following step S12, the video encoding means 22 encodes each of the plurality of scene video data into high-band main broadcast video data of several tens of Mbps, and the main broadcast video data is main-stream video buffering. The data is stored in the means 21 (S14).
[0027]
On the other hand, the process proceeds to step S15 in parallel with step S13 and the like, and the video encoding means 22 encodes each of the plurality of scene video data into coarsely edited video data having a relatively low bandwidth of 1 to 2 Mbps. Progressing to step S16 following step S15, the coarsely edited video transmission means 22 transmits the coarsely edited video data to the video broadcast server 10 of the broadcasting station via the network 30 (S16).
[0028]
FIG. 5 is an image diagram showing how the material video data is processed. In FIG. 5, the material video data 71 is divided into a plurality of scene video data 72 from scene A to scene H, and each encoded into the main broadcast video data is stored in the main broadcast video buffering means 21. The data encoded in the coarsely edited video data is transmitted to the video broadcast server 10.
[0029]
Next, processing in the video broadcast server 10 that has received the coarsely edited video data transmitted from the video buffering server 20 will be described. FIG. 6 is a flowchart for explaining the processing of the video broadcast server when the coarsely edited video data is received.
[0030]
In step S21, the coarse edited video receiving unit 13 receives the coarse edited video data transmitted from the video buffering server 20, and stores the received coarse edited video data in the coarse edited video storage unit 11 (S22). Subsequent to step S22, in step S23, the editing person in charge edits the coarsely edited video data to create editing information (EDL (Edit Decision List)). Here, EDL is data in text format indicating which part of a video composed of a plurality of scenes (A to H) is used for actual broadcasting in which order.
[0031]
FIG. 7 is a diagram illustrating a configuration example of the EDL. A description 181 (“C00: 00: 00 to 00:15:30”) in the EDL 18 means that an image from the beginning of the scene C to 15 minutes 30 seconds is used. Similarly, description 182 (“E00: 00: 00 to 00:12:00”) means that the video from the beginning of scene E to 12 minutes is used, and description 183 (“H00: 15: 0 to 00-00”). : 30: 30 ") means that the video of scene H from 15 minutes to 30 minutes 30 seconds is used. The EDL 18 indicates that broadcasting is performed in the order of descriptions 181, 182, and 183.
[0032]
When the editing operation is completed, in step S24, the video management table registration unit 14 of the video broadcast server 10 registers the attribute information of the coarsely edited video data in the video management table 15 for each scene. Further, the video management table registration unit 14 refers to the EDL 18 to confirm a scene used for broadcasting, and sets a flag in a record corresponding to the corresponding scene in the video management table 15.
[0033]
FIG. 8 is a diagram for explaining a configuration example of the video management table. The video management table 15 in FIG. 8 is a table for managing a scene name, a title, a coarse edit file name, a main broadcast file name, a storage flag, a reproduction time, and the like for each scene. The scene name is a name uniquely assigned to each scene. The title is a title given to each scene. The coarse edit file name is the file name of the file in which the coarse edit video data corresponding to the scene is stored. The main broadcast file name is a file name of a file in which main broadcast video data corresponding to the scene is stored. In the present embodiment, both the coarse edited video data and the main broadcast video data are stored as MPEG format files.
[0034]
The storage flag is a flag that takes values of 0, 1, and 2. Each value has the following meaning. “0” indicates that the corresponding main broadcast video data need not be downloaded from the video buffering server 20 because the scene is not used for broadcasting. “1” indicates that since the scene is used for broadcasting, it is necessary to download the corresponding main broadcast video data from the video buffering server 20. “2” indicates that the corresponding main broadcast video data has already been downloaded from the video buffering server 20.
[0035]
The reproduction time indicates the time when the scene is actually reproduced for broadcasting. Accordingly, the playback time is set only for the scene whose storage flag is 1 for broadcasting.
[0036]
In the video management table 15, the value of the storage flag is set based on the EDL 18 by the video management table registration unit 15 in step S24. That is, the storage flags of scene C, scene E, and scene H are set to 1 based on the descriptions 181, 182, and 183 of the EDL 18.
[0037]
Progressing to step S25 following step S24, the main broadcast video download means 16 refers to the video management table 15, confirms one scene that needs to be downloaded, and transmits the main broadcast video data corresponding to the scene. A request is made to the broadcast video transmission means 24 of the video buffering server 20. Upon receiving the main broadcast video data transmitted from the main broadcast video transmission unit 24, the main broadcast video download unit 16 stores the received main broadcast video data in the main broadcast video storage unit 12. For example, from the video management table 15 in FIG. 8, the scene C is first downloaded.
[0038]
Progressing to step S26 following step S25, the broadcast video download unit 16 sets the value of the storage flag in the video management table 15 to 2 (downloaded) for the scene that has been downloaded.
[0039]
Progressing to step S27 following step S26, the broadcast video download means 16 refers to the storage flag of the video management table 15 and download has been completed for all the scenes that need to be downloaded (scenes whose storage flag is 1). (Whether or not the storage flag is 2). If the download has not been completed yet, the process proceeds to step S25, and thereafter, the download is repeated for all the scenes that need to be downloaded. Therefore, for example, the scene E and the scene H are downloaded in order.
[0040]
FIG. 9 is a diagram showing the contents of the video management table after the main broadcast video data is downloaded. In the video management table 15 of FIG. 9, the storage flag for scene C and scene E is 2, and the storage flag for scene H remains at 1. This indicates that the download of the main broadcast video data is completed for the scene C and the scene E, and the download of the main broadcast video data is not completed for the scene H due to a network failure or the like. Accordingly, the scene H cannot be broadcast as it is.
[0041]
Hereinafter, processing of the video management apparatus 10 when the broadcast time is turned in such a state will be described. FIG. 10 is a flowchart for explaining the processing of the video broadcast server during broadcasting.
[0042]
When the broadcast time of one of the scenes to be broadcast is reached (S31), the video switching means 19 refers to the storage flag of the video management table 12 as to whether or not the main broadcast video data for the target scene has been downloaded. (S32). When the main broadcast video data of the target scene has been downloaded (for example, when the target scene is scene C or scene E), the process proceeds to step S33, and the video switching means 19 sends the main broadcast video reproduction means 60 to the switcher 50. Is instructed to reproduce the main broadcast video data. Note that the main broadcast video data of the target scene to be reproduced is specified in the video management table 15 (for example, H03.mpg when the target scene is scene C). Also, the playback location in the target scene is specified by the EDL 18.
[0043]
When the switcher 50 instructs the main broadcast video reproduction means 60 to reproduce the main broadcast video data of the target scene according to the instruction of the video switching means 19, the main broadcast video reproduction means 60 is stored in the main broadcast video storage means 12. The main broadcast video data of the target scene is played back. Thus, the main broadcast video data is broadcast.
[0044]
On the other hand, when the main broadcast video data for the target scene has not yet been downloaded (for example, when the target scene is H), the process proceeds to step S34. In step S34, the video switching means 19 instructs the switcher 50 to cause the coarse edited video reproduction means 0 to reproduce the coarse edited video data. The main broadcast video data of the target scene to be played back is specified in the video management table 15, and the playback location in the target scene is specified by the EDL 18 when the main broadcast video data is played back (S33). It is the same.
[0045]
When the switcher 50 instructs the coarse edited video reproduction means 40 to reproduce the coarse edited video data of the target scene according to the instruction of the video switching means 19, the coarse edited video reproduction means 40 is stored in the coarse edited video storage means 11. The rough edited video data of the target scene is played back. As a result, for the scene such as the scene H where the main broadcast video data does not exist, the coarsely edited video data is broadcast. However, at first glance, the video based on the coarsely edited video data is not different from the video based on the main broadcast video data. Therefore, the program can be provided without giving the viewer a sense of incongruity.
[0046]
As described above, according to the video broadcast server 10 in the present embodiment, based on the video management table 10, it is automatically determined whether or not the main broadcast video data of the scene to be broadcast has been downloaded. If the broadcast video data has not been downloaded, the coarsely edited video data is played back. Therefore, even if the main broadcast video data of the scene to be broadcast is not downloaded, the broadcast content will not be confused.
[0047]
Further, even when video data is transferred via an IP network or the like whose bandwidth is not guaranteed, a program can be appropriately broadcast.
[0048]
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to such specific embodiments, and various modifications can be made within the scope of the gist of the present invention described in the claims.・ Change is possible.
[0049]
In addition, the following additional notes are disclosed regarding the above description.
(Appendix 1) A video broadcasting method for broadcasting video using a computer,
A download status determination stage for determining whether the main broadcast video data of the broadcast scene is downloaded from a predetermined server;
When it is determined that the main broadcast video data of the broadcast scene is not downloaded in the download status determination step, the coarse editing corresponding to the scene among the coarse edit video data used for editing the broadcast scene A video broadcasting method comprising: a coarsely edited video data reproduction stage for reproducing video data.
(Additional remark 2) The said download condition judgment step is based on the video management table which links | relates and manages the main broadcast video data corresponding to the said scene for every scene, rough edit video data, and the download situation of the said main broadcast video data. The video broadcasting method according to claim 1, wherein it is determined whether the main broadcast video data of the scene to be broadcast has been downloaded from the predetermined server.
(Supplementary note 3) The video broadcasting method according to supplementary note 1 or 2, wherein, in the coarsely edited video data reproduction stage, coarsely edited video data corresponding to the broadcast scene is specified based on the video management table.
(Additional remark 4) When it is judged in the download situation judgment step that the main broadcast video data of the scene to be broadcast is downloaded, it further has a main broadcast video data reproduction step of reproducing the main broadcast video data. The video broadcast method according to any one of Supplementary notes 1 to 3, wherein the video broadcast method is characterized.
(Supplementary note 5) The video broadcasting method according to any one of supplementary notes 1 to 4, wherein the download is performed via an IP network.
(Appendix 6)
A download situation determination procedure for determining whether the main broadcast video data of the scene to be broadcast is downloaded from a predetermined server;
When it is determined that the main broadcast video data of the broadcast scene is not downloaded in the download situation determination procedure, the coarse editing corresponding to the scene among the coarse edit video data used for editing the broadcast scene A video broadcast program for executing a rough edited video data playback procedure for playing back video data.
(Appendix 7)
A download situation determination procedure for determining whether the main broadcast video data of the scene to be broadcast is downloaded from a predetermined server;
When it is determined that the main broadcast video data of the broadcast scene is not downloaded in the download situation determination procedure, the coarse editing corresponding to the scene among the coarse edit video data used for editing the broadcast scene A computer-readable recording medium having recorded thereon a video broadcast program for executing a coarsely edited video data playback procedure for playing back video data.
[0050]
【The invention's effect】
As described above, according to the present invention, even when high-quality video used for actual broadcasting cannot be obtained, broadcasting can be performed appropriately.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration example of a video broadcasting system in an embodiment of the present invention.
FIG. 2 is a diagram showing a hardware configuration example of a video broadcast server in the embodiment of the present invention.
FIG. 3 is a diagram illustrating a functional configuration example of a video broadcasting system according to an embodiment of the present invention.
FIG. 4 is a flowchart for explaining processing of capturing material video data by a video buffering server.
FIG. 5 is an image diagram showing how material video data is processed;
FIG. 6 is a flowchart for explaining processing of the video broadcast server when coarsely edited video data is received.
FIG. 7 is a diagram illustrating a configuration example of an EDL.
FIG. 8 is a diagram illustrating a configuration example of a video management table.
FIG. 9 is a diagram showing the contents of a video management table after downloading the main broadcast video data.
FIG. 10 is a flowchart for explaining processing of the video broadcast server during broadcasting.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Video broadcast system 10 Video broadcast server 11 Coarse edited video storage means 12 Main broadcast video storage means 13 Coarse edited video reception means 14 Video management table registration means 15 Video management table 16 Main broadcast video download means 17 Main broadcast video reception means 19 Video Switching means 20 Video buffering server 21 Main broadcast video buffering means 22 Video encoding means 23 Coarse edited video transmission means 24 Main broadcast video transmission means 30 Network 40 Coarse edited video reproduction means 50 Switcher 60 Main broadcast video reproduction means 70 Camera 71 Material Video data 100 Drive device 101 Recording medium 102 Auxiliary storage device 103 Memory device 104 Arithmetic processing device 105 Interface device B Bus

Claims (5)

  A video broadcasting method using a computer,
  An edited video reception stage in which the computer receives edited video data used for editing a broadcast program and stores it in a storage device;
  More than the edited video data corresponding to the scene based on the information recorded in the storage device for identifying the scene to be broadcast among the scenes included in the edited video data. A broadcast video reception stage for receiving high-quality broadcast video data and storing it in a storage device;
  A determination step in which the computer determines whether the broadcast video data corresponding to the scene is stored in the storage device at a broadcast time of the scene to be broadcast;
  Playback for reproducing the edited video data stored in the storage device corresponding to the scene to be broadcasted when the computer determines that the broadcast video data is not stored in the determination step A video broadcasting method comprising: steps. The determining step is based on the information indicating the status of reception of the broadcast video data for the scene to be recorded in the storage device in response to reception of the broadcasting image data corresponding to the scene for each of the scenes, the broadcast 2. The video broadcast method according to claim 1, wherein it is determined whether the video data is stored in a storage device. The reception of broadcast video data, video broadcast method according to claim 1 or 2, wherein the dividing line through the IP network. On the computer,
An edited video reception procedure for receiving edited video data used for editing a broadcast program and storing it in a storage device;
Broadcast with higher image quality than the edited video data corresponding to the scene, based on information recorded in a storage device for identifying a scene to be broadcast among scenes included in the edited video data Broadcast video reception procedure for receiving video data and storing it in a storage device;
A determination procedure for determining whether the broadcast video data corresponding to the scene is stored in the storage device at the broadcast time of the scene to be broadcast;
A playback procedure for playing back the edited video data stored in the storage device corresponding to the broadcast target scene when it is determined in the determination procedure that the broadcast video data is not stored. Video broadcast program to let you. On the computer,
An edited video reception procedure for receiving edited video data used for editing a broadcast program and storing it in a storage device;
Broadcast with higher image quality than the edited video data corresponding to the scene, based on information recorded in a storage device for identifying a scene to be broadcast among scenes included in the edited video data Broadcast video reception procedure for receiving video data and storing it in a storage device;
A determination procedure for determining whether the broadcast video data corresponding to the scene is stored in the storage device at the broadcast time of the scene to be broadcast;
A playback procedure for playing back the edited video data stored in the storage device corresponding to the broadcast target scene when it is determined in the determination procedure that the broadcast video data is not stored. A computer-readable recording medium on which a video broadcast program for recording is recorded.

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