JP4000538B2 - Program sending system, data reproducing apparatus, and data reproducing method - Google Patents

Description

[0001]
【table of contents】
The present invention will be described in the following order.
TECHNICAL FIELD OF THE INVENTION
Conventional technology
Problems to be solved by the invention
Means for solving the problem
BEST MODE FOR CARRYING OUT THE INVENTION
(1) Overall configuration of television broadcasting system according to the embodiment (FIG. 1)
(2) Configuration of CM insertion device (Figure 2)
(2-1) Configuration of encoding processing unit (FIGS. 3 and 4)
(2-2) Configuration of playout unit (FIGS. 5 and 6)
(2-3) Configuration of monitoring unit (Fig. 7)
(2-4) Configuration of a playlist creation computer (FIG. 8)
(2-5) Playout control software (FIGS. 9 to 13)
(3) Operation and effect
(4) Other embodiments
The invention's effect
[0002]
BACKGROUND OF THE INVENTION
The present invention relates to a television broadcasting system, a data reproducing apparatus, a data reproducing method, and a recording medium, and for example, a television broadcasting system, a data reproducing apparatus, and a data reproducing method that reproduce and decode data recorded by encoding processing. Moreover, it is suitable for application to a recording medium.
[0003]
[Prior art]
Conventionally, broadcast data transmitted from a television station has been recorded in the form of an analog signal, and the data has been reproduced and transmitted. However, in recent years, digitalization of audio and image data has become popular, and in response to this, broadcasting data consisting of video data and audio data is also required to be recorded after being subjected to encoding processing and data compression. . By performing encoding processing and recording in this way, fine editing of broadcast data is facilitated, and a large amount of data can be stored on a small number of recording media.
[0004]
[Problems to be solved by the invention]
Incidentally, it is possible to easily cope with an urgent program change or the like by recording the broadcasting data digitally in this way. For example, it may be necessary to replace predetermined broadcast data with other data immediately before broadcasting.
If pre-change and post-change broadcast data is recorded on the same recording medium, change the preset data transmission program list to indicate the broadcast data to be sent every time By reading the changed broadcast data instead of the broadcast data, it is possible to easily cope with such a change in a short time. Even when pre-change and post-change broadcast data are recorded on separate recording media, each broadcast data is encoded and recorded. Therefore, desired broadcast data can be easily and quickly recorded. It is possible to search and data can be easily replaced.
[0005]
However, if the broadcast data sending program list is changed so that the broadcast data after the change is read out instead of the broadcast data before the change, the broadcast to be changed during the program list change work It is considered that it is time to send out data for use, which may cause a problem that the sending of broadcast data is interrupted due to an abnormality in the data sending program list.
[0006]
The present invention has been made in consideration of the above points. A television broadcasting system, a data reproducing apparatus, and a data reproducing method capable of performing editing during data transmission and compensating for reliable and continuous data transmission. In addition, a recording medium is proposed.
[0007]
[Means for Solving the Problems]
In order to solve this problem, in the present invention, Reproducing means for reproducing and transmitting a plurality of recorded image and audio data according to a predetermined playlist representing the reproduction order of image and audio data created in advance, and storage means for storing the playlist as a pre-edit playlist And display means for displaying the playlist, and image and audio data designated as the editing target during the editing operation when the playlist being played is edited by a user instruction input on the display screen of the display means Detecting means for detecting the remaining time until the start of playback, and if the remaining time is less than the predetermined time, the image and audio data to be edited in the playlist are converted into the image and audio data before editing based on the playlist before editing. Change means to change and, when the playlist is changed, notify the playback means to play back according to the changed playlist. And notification means Is provided.
[0008]
Remaining time until start of playback detected Is less than the prescribed time Before editing play list To play according to By notifying the playback means, Concerned Reproduction means By Further, it is possible to prevent erroneous transmission and interruption of data transmission due to a mismatch between the image and audio data registered on the program list before and during editing.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
[0010]
(1) Overall configuration of television broadcasting system according to the embodiment
In FIG. 1, reference numeral 1 denotes a CATV television broadcasting system to which the present invention is applied as a whole. Each of the cart machines 2 to 7 and the cart machines 2 to 7 has a plurality of channels (6 channels in this embodiment). The control units 8 to 13 and the CM (commercial video) insertion device 14 are provided correspondingly.
[0011]
The control units 8 to 13 send control signals C to the cart machines 2 to 7 in accordance with the program organization program input in advance. ₁ ~ C ₆ Supply each.
Each cart machine 2-7 has a control signal C supplied from the control unit 8-13, respectively. ₁ ~ C ₆ Based on the video / audio signal VA of the designated program from the designated video tape during the program broadcast time ₁ ~ VA ₆ Are output from each channel via a built-in switch (not shown).
[0012]
Further, each cart machine 2 to 7 receives the timing signal GPI when it is 1 second to 2 seconds before the scheduled CM insertion start time. ₁ ~ GPI ₆ To the CM insertion device 14, CM video / audio signals CVA along a CM transmission program list (hereinafter referred to as “playlist”) set in advance for each channel. ₁ ~ CVA ₆ Is reproduced from the start time by the CM insertion device 14, and the CM video / audio signal CVA is reproduced. ₁ ~ CVA ₆ Is sent to the outside through a switcher.
[0013]
The cart machines 2 to 7 are CM video / audio signals CVA. ₁ ~ CVA ₆ Video / audio signal VA of the next program at the end of transmission ₁ ~ VA ₆ CM video / audio signal CVA ₁ ~ CVA ₆ Switch the switch at the end of the video / audio signal VA of the next program ₁ ~ VA ₆ Has been made to output.
As described above, the television broadcasting system 1 uses the cart machines 2 to 7 in accordance with the program organization program set in advance for each channel, and the program video / audio signal VA. ₁ ~ VA ₆ And CM video / audio signal CVA ₁ ~ CVA ₆ Are transmitted while being sequentially switched, so that CMs along the playlist can be broadcast between programs.
[0014]
(2) Configuration of CM insertion device
As shown in FIG. 2, the CM insertion device 14 has a CM video / audio signal CVA. ₁ ~ CVA ₆ Is encoded by an encoding procedure based on the MPEG (Moving Picture Experts Group) standard, multiplexed and output as encoded data D1, and encoded data D1 is recorded and stored, and the encoded data D1 is stored. A playout unit 16 that reproduces and outputs in accordance with a preset playlist for each channel, and a CM video / audio signal CVA ₁ ~ CVA ₆ The monitoring unit 17 is configured to monitor the transmission state of the video and to create and edit the playlist as necessary.
The encoding processing unit 15, the playout unit 16, and the monitoring unit 17 are connected to each other by a network via an Ethernet bus EB.
[0015]
The encoding processing unit 15 encodes the CM video / audio signal CVA recorded on the video tape by the VTR 19 by the encoder 21 under the control of the computer 18. Here, the encoding processing unit 15 performs editing while monitoring the CM video / audio signal CVA with the monitor 20. That is, by specifying the broadcast range of the CM video / audio signal CVA that the user wants to encode in units of “seconds” using a time code, the encoding processing unit 15 selects the CM video / audio signal CVA of the specified portion. It is encoded and recorded in a recording means such as the library unit 22 or streamer 23.
[0016]
The computer 18 supplies an instruction signal S 1 for encoding the CM video / audio signal CVA in the designated recording time range to the encoder unit 21. The encoder unit 21 encodes the CM video / audio signal CVA in the range of the time code designated based on the instruction signal S1 according to the MPEG standard.
In practice, the encoder unit 21 adds an ID number to each CM video / audio signal CVA in the specified time range, converts it to a transmission unit called “clip ID”, and creates an “encode list” composed of a plurality of clip IDs. To do. The encoder unit 21 collectively encodes each clip ID based on the created “encode list”, saves it as encoded data D1 in the library unit (hard disk) 22, and stores it in the video server 25 of the playout control unit 16 in the video server 25. Send at a transfer rate of [Mbps].
At this time, the encoding processing unit 15 displays the video state (image quality and the like) of the encoded clip ID on the monitor 20. Accordingly, the operator can confirm the video state of the encoded clip ID on the monitor 20.
[0017]
The computer 18 reads the encoded data D1 stored in the library unit 22, sends it to the streamer 23, and sends it to the streamer tape for recording. Thus, the CM insertion device 14 can carry the streamer tape on which the encoded data D1 is recorded by the encoding processing unit 15, and the streamer of the playout unit 16 provided at a remote location. 27 Thus, the encoded data D1 can be read out.
[0018]
In addition, the playout unit 16 receives the encoded data sent from the encoder unit 21 of the encoding processing unit 15 by the computer 24 based on a control signal supplied from the computer 18 of the encoding processing unit 15 via the Ethernet bus EB. D1 is stored in one of the media units 26 (hard disk) designated via the video server 25 (media units 26A to 26F).
The streamer 27 can also read the encoded data D1 by reproducing the recorded streamer tape by the streamer 23 of the encoding processing unit 15.
[0019]
further, Playout section 16 reads out the encoded data D1 stored in each media unit 26A to 26F, creates a "play list" to be broadcast as a CM, and stores it in a hard disk (not shown) in the computer 24. .
The video server 25 receives timing signals GPI corresponding to each channel from the cart machines 2 to 7 (FIG. 1). ₁ ~ GPI ₆ , The clip IDs programmed in the “playlist” are sequentially decoded, and the CM video / audio signal CVA in the order of the program at the timing when the program ends. ₁ ~ CVA ₆ Is output from the designated channel via the cart machines 2-7.
[0020]
On the other hand, the monitoring unit 17 includes monitoring computers 28 to 33, and a CM video / audio signal CVA transmitted from the video server 25 corresponding to each channel. ₁ ~ CVA ₆ The text data representing the contents of the play list can be confirmed on the computer screen.
For this reason, in the monitoring unit 17, dedicated operators are arranged for the respective computers 28 to 33, and each operator receives the CM video / audio signal CVA. ₁ ~ CVA ₆ The broadcast status is monitored for each channel.
[0021]
The monitoring computers 28 to 33 display the playlists of 1 to 6 channels in order as the initial state of starting up, but by switching the switches, the playlists of the desired channels can be displayed on any monitoring computer. It is made like that.
Further, the monitoring computers 28 to 33 have the same functions as the computer 24 of the playout control unit 16 and execute creation and reproduction of a playlist, and editing of a clip ID (replacement of clip ID, etc.) during reproduction of the playlist. Has been made to get.
[0022]
Furthermore, the CM insertion device 14 has a playlist creation computer 34 for creating and editing a playlist offline outside.
The playlist creation computer 34 has a function of executing creation and editing of a playlist, and records the created playlist on a Floppy disk (not shown).
Therefore, the CM insertion device 14 reads out the playlist recorded on the Floppy disk by the computer 24 of the play-out unit 16, so that the CM video / audio signal CVA is read according to the playlist. ₁ ~ CVA ₆ Can be output from the video server 25.
[0023]
(2-1) Configuration of encoding processing unit
As shown in FIG. 3, the encoder unit 21 of the encoding processing unit 15 includes a peripheral device control unit 41, an audio data encoding unit 42, a video data encoding unit 43, a multiplexing unit 44, and an MPEG2 bit stream data decoding unit 45. And are connected to each other by a system bus 46.
[0024]
The peripheral device control unit 41 reproduces the CM video in the range specified by the time code based on the instruction signal S1 from the computer 18 by the VTR 19 and supplies the audio signal A1 to the audio data encoding unit 42. The video signal V1 is supplied to the video data encoder 43.
[0025]
The peripheral device control unit 41 controls the audio data encoding unit 42, the video data encoding unit 43, the multiplexing unit 44, and the MPEG2 bit stream data decoding unit 45. The audio data encoding unit 42 controls the audio signal A1. Is encoded into audio encoded data AE1 compliant with the MPEG2 standard layer 2 and the video signal encoding unit 43 encodes the video signal V1 into video encoded data VE1 compliant with the MPEG2 standard MP @ ML. The data is supplied to the multiplexing unit 44.
[0026]
The multiplexing unit 44 multiplexes the audio encoded data AE1 and the video encoded data VE1 to generate bit stream data D2. The peripheral device control unit 41 sends the encoded data D1 made up of bit stream data to the MPEG2 bit stream data decoding unit 45 via the system bus 46.
The peripheral device control unit 41 can send the encoded data D1 to the video server 25 and store it in the media units 26A to 26F via the video server 25.
[0027]
Further, the peripheral device control unit 41 can temporarily store the encoded data D1 in the library unit 22, and can record the encoded data D1 stored in the library unit 22 on the streamer tape by the streamer 23.
[0028]
When the MPEG2 bit stream data decoding unit 45 decodes the encoded data D1 and extracts the CM video signal V2 and the CM audio signal A2 based on the control of the peripheral device control unit 41, the CM video signal V2 is obtained as a video confirmation monitor. 20, the CM audio signal A <b> 2 is amplified via an audio amplifier 47 and output from the speaker 48 as audio.
Therefore, the operator displays the CM video signal V2 of the clip ID actually encoded on the monitor 20 and outputs the CM audio signal A2 via the speaker 48, thereby checking the image quality and the sound quality. Yes.
[0029]
Next, as shown in FIG. 4, the computer 18 in the encoding processing unit 15 includes a CPU (Central Processing Unit) 51A that is a control unit of the computer, a ROM (Read Only Memory) 52A that is a main memory, and a RAM (Random Access Memory). ) 53A and a VRAM (Video Random Access Memory) 54A, which is a memory for displaying images, are connected via a system bus 55A. Further, peripheral devices such as input / output means and external storage means are connected to the CPU 51A, ROM 52A, RAM 53A and VRAM 54A via a system bus 55A.
[0030]
The ROM 52A stores a basic input / output system (BIOS) that is a basic operation program for initializing a hardware system when the computer 18 is started up. The RAM 53A is used as a work area of the CPU 51A for an execution program of an OS (Operating System) or application software. Further, the VRAM 54A is used as a memory for writing image display data to be displayed on the screen on a monitor 56A provided in the computer 18.
When the computer 18 is started up by the BIOS read from the ROM 52A when the power is turned on, the CPU 51A reads the OS from the hard disk 57A via the SCSI interface 58A and loads it into the RAM 53A. As a result, the computer 18 can be operated under the control of the CPU 51A via the OS.
[0031]
When the video / audio signal is encoded, the CPU 51A reads out the encoding control software for executing various processes related to encoding from the hard disk 57A via the SCSI interface 58A and loads it into the RAM 53A. Then, the image display data of the encoding control software is written into the VRAM 54A via the OS.
[0032]
The computer 18 sends image display data such as a menu screen and text input by the keyboard 60A used when executing various processes related to the encoding process using the encoding control software via the OS to the VRAM 54A. The image is displayed on the screen by being written on and periodically read out by the CPU 51A.
[0033]
In this case, the computer 18 inputs the input information input by the keyboard 60A or the mouse 62A as input means via the keyboard interface 59A or the mouse interface 61A, respectively, and the encoding control software via the OS. Has been made to hand over.
[0034]
Here, when a menu screen or work screen related to the encoding process is displayed on the CRT monitor 56A, the image display data is read from the VRAM 54A and sent to the D / A (Digital / Analog) converter 63A under the control of the CPU 51A. The D / A converter 63A converts the digital video signal into an analog video signal and outputs the analog video signal to the CRT monitor 56A.
A printer 64A is connected to the computer 18 via a parallel interface 65A and a bus 55A, and the display screen content displayed on the CRT monitor 56A can be printed out using the printer 64A. ing.
[0035]
Further, a computer 24 of the playout unit 16 and computers 28 to 33 of the monitoring unit 17 are connected to the computer 18 of the encoding processing unit 15 via an Ethernet bus EB and an Ethernet interface 67A. As a result, commands and data can be transmitted and received between the computer 18 of the encoding processing unit 15, the computer 24 of the playout unit 16, and the computers 28 to 33 of the monitoring unit 17.
In this case, the video server 25 of the playout unit 16 is connected to the computer 18 of the encoding processing unit 15 via the serial interface 66A, and the encoding control software is connected to the encoder unit 21 or the video server 25. Various commands for processing by can be transmitted and received.
[0036]
(2-2) Configuration of playout unit
As shown in FIG. 5, the video server 25 of the playout control unit 16 receives a command from the computer 24 based on the playlist by the system control unit 71, and the system control unit 71 reproduces the data recorded based on the command. Has been made to run.
[0037]
The system controller 71 controls the entire video server 25, and the timing signal GPI sent from the cart machines 2 to 7 (FIG. 1). ₁ ~ GPI ₆ Based on the data, the HDD control units 72 to 78 read the encoded data D1 stored in the media units 26A to 26G, respectively, and send them to the time division multiplexing control unit 80 via the data bus 79.
[0038]
The time division multiplexing control unit 80 performs time division multiplexing processing on the encoded data D1, and sends it to the A / V decoding units 82 to 87 corresponding to the respective channels via the data bus 81 as bit stream data D3.
The A / V decoding units 82 to 87 decode the bit stream data D3, and perform analog CM video signal and audio signal CVA. ₁ ~ CVA ₆ (FIG. 1) is output.
[0039]
The data input unit 88 is for inputting the encoded data D1 sent from the encoder unit 21 of the encoding processing unit 15. The encoded data D1 is sent to the time division multiplexing control unit 80, and the time division Recording is performed on the media units 26A to 26G via the multiplex control unit 80, the data bus 79, and the HDD control units 72 to 78 in order.
[0040]
Further, in FIG. 6 in which the subscript “B” is added to the same reference numerals corresponding to those in FIG. 4, the computer 24 of the playout unit 16 includes encoding control software recorded on the hard disk 57 A of the computer 18. Except that a different playout control software is stored in the hard disk 57B and is connected to the computer 18 of the encoding processing unit 15 and the computers 28 to 33 of the monitoring unit 17 via the Ethernet interface 67B. The configuration is the same as that of the computer 18.
[0041]
The playout control software is used to execute various processes such as creation, editing, and playback of a playlist. The computer 24 can execute various processes based on the playout control software. .
[0042]
(2-3) Configuration of monitoring unit
In FIG. 7, in which the suffix “C” is added to the same reference numerals corresponding to those in FIG. 4, the monitoring computers 28 to 33 of the monitoring unit 17 are the encoding control software recorded on the hard disk 57 </ b> A of the computer 18. Playout monitoring software different from the above is stored in the hard disk 57C, connected to the computer 24 of the playout section 16 via the Ethernet interface 67C, and has a serial interface 66B. The configuration is the same as that of the computer 18 except that it is connected only to the computer 24.
[0043]
The playout monitoring software is a program having exactly the same functions as the playout control software, and not only monitors the contents and transmission status of the playlist on the CRT monitor 56C but also changes the playlist. Or editing operations such as replacing clip IDs, and playback of playlists.
[0044]
As described above, the computers 28 to 33 have the same function as the computer 18, but the computer 18 is normally set so that the function is given priority. Therefore, the computer 28-33 can edit and play the playlist for the first time when the computer 18 is given the authority to prioritize the functions of the computers 28-33 by the operation of the operator. ing.
[0045]
(2-4) Configuration of a playlist creation computer
In FIG. 8, in which the suffix “D” is added to the same reference numerals as those in FIG. 4, the playlist creation computer 34 is different from the encoding control software recorded on the hard disk 57A of the computer 18. The playlist creation software is recorded on the hard disk 57D, the serial interface and the parallel interface are not provided, and the Ethernet interface is not provided and is not connected to other computers. Except for this point, the configuration is the same as that of the computer 18.
[0046]
The playlist creation software is a program having a playlist creation and editing function. The playlist created by the playlist creation computer 34 is recorded on a Floppy disk or the like, and recorded by the computers 24 and 28-33. The playlist data can be read out.
[0047]
(2-5) Playout control software
As shown in FIG. 9, the screen layout of the playout control software loaded on the computer 24 to execute various processes such as creation, editing, and playback of a playlist has a hierarchical structure with the main menu 91 as the highest level. At the lower level of the main menu 91, there are a playlist creation screen group 92, a channel status 93, a clip management screen group 94, and a utility 95 screen. Further, below the screen of the channel status 93, there are a playlist editing screen 96, a multi-channel status 97 screen, and a playlist table 98 screen.
[0048]
As shown in FIG. 10, the display screen of the main menu 91 has a selection button 91B for shifting functions to the playlist creation screen group 92, a selection button 91C for shifting functions to the screen of the channel status 93, and clip management. A selection button 91A for transferring functions to the screen group 94 and a selection button 91D for transferring functions to the screen of the utility 95 are displayed. The computer 24 clicks one of the selection buttons 91A to 91D with the mouse 62B, and inputs the function selection signal of the clicked selection button to the CPU 51B via the mouse interface 61B and the system bus 55B sequentially. The CPU 51B displays the selected function operation screen on the monitor by writing screen data for displaying the function screen selected in accordance with the input to the VRAM 54B. When the EXIT button 91E is clicked, the computer 24 inputs an end signal to the CPU 51B and ends the playout control software.
[0049]
The playlist creation screen group 92 is a function operation screen that is used to create a playlist in advance before broadcasting. A playlist having a desired ID number is selected from a reference screen of each playlist and further subordinate. By selecting the function, the screen is shifted to a broadcast data display screen or a playlist creation screen (not shown).
The broadcast data display screen displays the detailed contents such as the number of each event registered in the selected playlist, the start time, the required display time, and the clip ID, and displays video on the monitor based on the playlist. . Thereby, the user confirms whether or not there is an error or the like in each event registered in the playlist.
The playlist creation screen creates a playlist by selecting and inputting a desired event number from the keyboard and designating a desired clip ID. On the playlist creation screen, editing operations such as change, addition, or deletion can be performed in addition to input. The playlist that has been modified, added, or deleted in this manner is stored in the hard disk by being saved. By switching to the playlist correction screen for mouse input, each selection input and function selection can be performed from the mouse instead of the keyboard.
[0050]
As shown in FIG. 11, on the screen of the channel status 93, the detailed contents of the selected playlist being broadcast are displayed, and the processing status of the playlist being broadcast can be monitored by referring to this. It is made like that.
In the upper part of the screen of the channel status 93, an ACT button 93A, a STOP button 93B, a multi-status shift button 93C, a playlist table shift button 93D, a playlist edit shift button 93E, a main menu shift button 93F, and a channel selection button 93G are displayed. ing. When the ACT button 93A is clicked, a control signal instructing the CPU 51B to execute playback is given, and playback of images and sounds is executed according to the selected playlist. When the STOP button 93B is clicked, a control signal instructing the CPU 51B to stop is given, and playback of images and sounds is stopped.
A multi-status shift button 93C, a playlist table shift button 93D, a playlist edit shift button 93E, and a main menu shift button 93F are selection buttons for instructing a shift to another function screen, and are clicked to the CPU 51B. A control signal for requesting screen transition is given, and the screen display is switched to the screen of the multi-channel status 97, the screen of the playlist table 98, and the screen for playlist editing 96 by writing screen data into the VRAM 54B of the CPU 51B. In addition, by clicking the channel selection button 93G and instructing and inputting a desired channel number, it is possible to select and instruct a channel for sending image and audio data.
[0051]
In addition, a countdown display 93H, a date display 93I, and a playlist ID display 93J are provided at the upper part of the channel status 93 screen. The elapsed time from the start of playback of each clip ID, the broadcast date of the playlist, The playlist ID number is displayed.
Further, a display frame 93K for displaying the detailed contents of the playlist is provided at the bottom of the screen of the channel status 93. The detailed contents of the playlist displayed in the playlist ID display 93J are displayed in the frame. The event number, the data reproduction start time of each event number, the clip ID associated with each event, and each clip ID are displayed. Title names, supplementary items, required playback time of each clip ID, and the total time of clip IDs broadcasted between programs are sequentially displayed. Here, a check mark is added to the event number that has been broadcast, and the display color of the event number that is being broadcast is reversed. This allows the user to easily identify broadcasted, broadcasted and unbroadcast events.
[0052]
As shown in FIG. 12, the playlist editing screen 96 displays each event number, start time, clip ID, data name, display time, etc. of the playlist being broadcast. Can be edited. At the top of the playlist editing screen 96, a cancel button 96A, a print button 96B, a mouse editing screen transition button 96C, a playlist table transition button 96D, Previas A button 96E and a main menu shift button 96F are displayed, and by clicking, the editing process is interrupted, the playlist data is printed, the screen is shifted to the editing screen with the mouse, and the screen is shifted to the playlist table 98 screen. , A control signal for requesting transition to the previous screen or transition to the screen of the main menu 91 is input to the CPU 51B, and each request such as screen transition is executed.
[0053]
An edit function frame 96G, a date display 96H, a playlist ID display 96I, and a channel display 96J are provided at the center of the playlist editing screen 96. A date display 96H, a playlist ID display 96I, and a channel display 96J display the broadcast date, playlist ID, and channel number of the playlist, respectively.
Further, a display frame 96K for displaying the detailed contents of the playlist is provided at the bottom of the screen, and the event number registered in the playlist, the data playback start time of each event number, and the event are associated with each other. The clip ID, the title name of each event, supplementary items, the time required to reproduce each event, and the total time of the clip ID broadcast between programs are sequentially displayed.
[0054]
When the editing work is actually performed, the display frame 96K and the editing function frame 96G described above are used. For example, when replacing data of a desired clip ID with data of another clip ID, first click the “Overwrite” item in the edit function frame 96G, and then click the desired event number displayed in the display frame 96K. . As a result, the event number, clip ID, start time, title name, and required playback time selected by the CPU 51B are displayed in the edit function frame 96G, and the number immediately preceding the selected event number in the display frame 96K. The position display indicating the data change position is displayed in the part. In this state, by inputting a desired ID from the keyboard 60B into the clip ID display field in the edit function frame 96G and rewriting the ID name of the clip ID with the desired clip ID, the CPU 51B has the clip ID of the selected event number. The data is changed to the newly rewritten clip ID data.
[0055]
When a clip ID is newly added after a desired event number, the “Insert” item in the editing function frame 96G is first clicked, and then the desired event number displayed in the display frame 96K is clicked. As a result, the CPU 51B displays a position display indicating the data change position in the number part immediately before the selected event number in the display frame 96K. In this state, by inputting a desired clip ID to the clip ID display field in the edit function frame 96G from the keyboard 60B, the CPU 51B selects the event number, clip ID to be added, start time, title in the edit function frame 96G. The name and the time required for reproduction are displayed, new clip ID data is added to the selected event number, and the subsequent numbers are shifted and displayed one by one. Further, when deleting the clip ID of the desired event number, the desired event number displayed in the display frame 96K is clicked. As a result, the CPU 51B displays the event number, clip ID, start time, title name, and required playback time of the selected event in the editing function frame 96G, and the number immediately before the selected event number in the display frame 96K. The position display indicating the data change position is displayed in the part. In this state, by clicking the “Delete” button in the edit function frame 96G, the CPU 51B deletes the data of the selected event number. By clicking the mouse editing screen transition button 96C on the playlist editing screen 96 and switching to a playlist editing screen (not shown) for mouse input, the CPU 51B performs each selection input and function selection from the mouse. be able to.
[0056]
Editing operations such as modification, addition, or deletion are performed in the memory space of the RAM 53B in the computer 24 (FIG. 2), and the playlist after editing is played back before editing by being saved in the hard disk of the computer 24. The list is overwritten.
As described above, when editing a playlist being broadcast, the computer 24 (FIG. 6) calculates the remaining time until the start of data transmission of the event number designated as the editing target based on a predetermined processing procedure. Detection is performed, and it is determined whether or not the change due to the editing work is valid according to the detection result.
[0057]
That is, as shown in FIG. 13, when a predetermined playlist is being reproduced and the editing process is performed on the playlist, the computer 24 starts the procedure at step SP1. The computer 24 processes the editing work at step SP2, and reproduces and transmits the broadcast data of the corresponding event number when the predetermined time is reached.
In step SP3, the computer 24 detects the remaining time t of the data of the currently transmitted event number (i) and compares it with a predetermined time set in advance. In this embodiment, the predetermined time is set to 10 seconds, and if it is 10 seconds or more, the process returns to step SP2. If the predetermined time is 10 seconds, the process proceeds to the next step. Next, in step SP4, the computer 24 stores the data next to the event number (i) being transmitted, that is, the event number (i + 1) of the playlist in which the data of the event number (i + 1) in the memory space is stored in the hard disk. Compare with the data to determine whether they match.
[0058]
If the data of the event number (i + 1) of the playlist stored in the hard disk matches the data of the event number (i + 1) of the playlist in the memory space at step SP5, the computer 24 returns to step SP2 and does not match. In this case, the process proceeds to the next step SP6.
If the data of the event number (i + 1) of the playlist stored in the hard disk does not match the data of the event number (i + 1) of the playlist in the memory space, the computer 24 is in step SP6 and the memory space The data of the event number (i + 1) of the playlist is changed to the data of the event number (i + 1) of the playlist stored in the hard disk, and the process returns to step SP2.
[0059]
As described above, when editing the playlist being broadcast, the computer 24 detects the remaining time until the data playback start time of the event number designated as the editing target, and the completion of the editing process is in time for the playback start time. If it is determined that there is not, the data of the playlist being edited is changed to the data registered in the playlist before editing, and the data registered in the playlist before editing is forcibly transmitted. .
[0060]
(3) Operation and effect
In the above configuration, the television broadcasting system 1 follows the program organization program preset for each channel, and the video / audio signal VA of the program. ₁ ~ VA ₆ And CM video / audio signal CVA ₁ ~ CVA ₆ Are transmitted while being sequentially switched, so that a CM along a playlist created in advance can be broadcast between programs. Also, by editing the playlist, CMs to be broadcast can be replaced, added and deleted easily and in a short time, and even when an urgent change request occurs immediately before broadcasting, it can be easily handled.
[0061]
Here, when such editing processing is performed during broadcasting and the time until the data reproduction of the event number to be edited is less than the predetermined time, the clip ID data registered in the playlist before editing and editing are performed. There is a case where the clip ID data on the play list in the middle does not match, and transmission of broadcast data may be interrupted.
In order to avoid this, when the television broadcasting system 1 edits a playlist being broadcast by the computer 24, the television broadcasting system 1 detects the remaining time until the event number data to be edited is reproduced. If the remaining time is less than the predetermined time, the data of the event number to be edited is changed to the data before editing. Thus, when the editing process is completed before the data to be edited is reproduced, the clip ID is reproduced and broadcasted according to the edited playlist, and it is determined that the reproduction start time is not in time. The clip ID registered in the playlist before editing can be reproduced and broadcast, and reliable and continuous broadcasting can be compensated.
[0062]
According to the above configuration, when the playlist being broadcast is edited by the computer 24, the remaining time until the reproduction of the event number data to be edited is detected, and the detection result is less than the predetermined time, If the data is played back according to the playlist before editing, and the editing process is completed before the data to be edited is played back, the clip ID is played back according to the edited playlist. If it is determined that it is not in time for the playback start time, the clip ID registered in the playlist before editing can be played and broadcast, and the playlist being broadcast can be edited accordingly. At the same time, reliable and continuous broadcasting can be compensated.
[0063]
(4) Other embodiments
In the above-described embodiment, the case where the present invention is applied to the CATV television broadcast system 1 has been described. However, the present invention is not limited to this, and may be applied to, for example, a general television broadcast system.
[0064]
In the above-described embodiment, the case of the television broadcast system 1 in which the CM video as broadcast data is replaced, added, or deleted by editing the playlist has been described. For example, the present invention may be applied when replacing, adding, or deleting program data other than CM video.
[0065]
In the above-described embodiment, the case of the television broadcasting system 1 having 6 channels has been described. However, the present invention is not limited to this. For example, the present invention may be applied to the case of having only 1 channel, and more than 1 channel. It may be applied to the case where a plurality of channels are provided. That is, the present invention can be applied regardless of the number of channels.
[0066]
In the above-described embodiments, the case where a hard disk and a streamer are used as the recording medium has been described. However, the present invention is not limited to this. For example, the present invention may be applied to the case where an optical disk, MO, DVD or the like is used.
[0067]
Further, in the above-described embodiment, the case where the playlist is edited by the computer 24 of the playout unit 16 has been described. However, the present invention is not limited to this, for example, by any of the computers 28 to 33 of the monitoring unit 17. Therefore, it may be applied when editing a playlist.
[0068]
【The invention's effect】
As described above, according to the present invention, Reproducing means for reproducing and transmitting a plurality of recorded image and audio data according to a predetermined playlist representing the reproduction order of image and audio data created in advance, and storage means for storing the playlist as a pre-edit playlist And display means for displaying the playlist, and image and audio data designated as the editing target during the editing operation when the playlist being played is edited by a user instruction input on the display screen of the display means Detecting means for detecting the remaining time until the start of playback, and if the remaining time is less than the predetermined time, the image and audio data to be edited in the playlist are converted into the image and audio data before editing based on the playlist before editing. Change means to change and, when the playlist is changed, notify the playback means to play back according to the changed playlist. Providing a notification means As a result, if the remaining time until the start of playback is less than the predetermined time, play The playback means can be controlled to play back the image and audio data registered in the list. play It is possible to prevent erroneous transmission and interruption of data transmission due to inconsistency of image and audio data registered on the list, and in this way, during data transmission play List editing can be performed and reliable and continuous data transmission can be compensated.
[Brief description of the drawings]
FIG. 1 is a block diagram showing the overall configuration of a television broadcast system according to an embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of a CM insertion device.
FIG. 3 is a block diagram showing a detailed configuration of an encoder unit.
FIG. 4 is a block diagram showing a detailed configuration of a computer of an encoding processing unit.
FIG. 5 is a block diagram showing a detailed configuration of a video server.
FIG. 6 is a block diagram showing a detailed configuration of a computer in the playout unit.
FIG. 7 is a block diagram showing a detailed configuration of a computer of a monitoring unit.
FIG. 8 is a block diagram showing a configuration of a playlist creation computer.
FIG. 9 is a schematic diagram for explaining a screen configuration of playout control software;
FIG. 10 is a plan view of a display screen for explaining the main menu.
FIG. 11 is a plan view for explaining a channel status screen.
FIG. 12 is a plan view for explaining a playlist editing screen.
FIG. 13 is a flowchart for explaining whether or not to validate an editing result made during broadcasting.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Television broadcasting system, 2-7 ... Cart machine, 8-13 ... Control part, 14 ... CM insertion device, 15 ... Encoding processing part, 16 ... Play out part, 17 ... Monitoring , 18, 24... Computer, 21... Encoder, 25... Video server, 28 to 33... Monitoring computer, 34. Playlist creation computer, 41. Peripheral device controller, 42 ...... Audio data encoding unit, 43 ... Video data encoding unit, 44 ... Multiplexing unit, 45 ... MPEG2 bit stream data decoding unit, 56A to D ... CRT monitor, 57A to D ... Hard disk, 60A to D ... Keyboard, 62A-D ... Mouse, 64A-C ... Printer, 71 ... System controller, 72- 8 ...... HDD controller, 80 ...... time division multiplexing controller, 82-87 ...... A / V decoding unit, 88 ...... data input unit.

Claims (6)

A predetermined There was a playlist recorded plurality of the images and reproducing means for transmitting reproduced audio data representing the reproduction order of pre-created image and audio data,
Storage means for storing the playlist as a playlist before editing;
Display means for displaying the playlist ;
When editing the playlist that is being played back by the user's instruction input on the display screen of the display means, the remaining time until the start of playback of the image and audio data specified as the editing target during the editing operation is calculated. Detecting means for detecting;
When the remaining time is less than a predetermined time, changing means for changing the image and audio data to be edited in the playlist to the image and audio data before editing based on the playlist before editing,
A program sending system comprising: notification means for notifying the reproducing means to reproduce according to the changed playlist when the playlist is changed . The predetermined time is determined based on the time required to reflect the editing work on the image and audio data.
Program delivery system according to claim 1, characterized in that. Reproducing means for reproducing the data had was to a predetermined play list representing a reproduction order of the recorded plurality data,
Storage means for storing the data as pre-edit data;
Display means for displaying the playlist ;
If you want to edit the data of the play list is being reproduced executed by the user's instruction input on the display screen, which is by connexion displayed on the display means, the time remaining until the start of reproduction of the data that has been designated as the edited Detecting means for detecting
When the remaining time is less than a predetermined time, changing means for changing the data to be edited in the playlist to the data before editing based on the playlist before editing,
A data reproducing apparatus comprising: notification means for notifying the reproduction means to reproduce according to the change result when the playlist is changed . The predetermined time is determined based on the time required to reflect the editing work on the image and audio data.
Data reproducing apparatus according to claim 3, characterized in that. Designated as an editing target when editing the playlist by a user's instruction input on a predetermined display screen while the data is being reproduced by a predetermined reproducing means in accordance with a predetermined playlist indicating the reproduction order of the plurality of recorded data A detection step for detecting a remaining time until the reproduction of the data is started ,
When the remaining time is less than the predetermined time, a change to change the data to be edited in the playlist to the data before editing based on the pre-edit playlist stored in a predetermined storage unit in advance Steps,
A playback step for playing back the data before editing as a playback target ;
A data reproduction method comprising the steps of: The predetermined time is determined based on the time required to reflect the editing work on the image and audio data.
6. The data reproduction method according to claim 5, wherein

Images