JP4005818B2 - Digital teletext signal monitoring apparatus and digital teletext signal monitoring method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is applied to a digital broadcast program transmission device that multiplexes and transmits a digital teletext signal to a digital broadcast program information signal, and a digital teletext signal monitor device and a digital teletext signal monitor method for monitoring the digital teletext signal About.
[0002]
[Prior art]
In recent years, with the establishment of digital broadcasting technology, digital broadcasting has been started in satellite broadcasting systems using communication satellites and broadcasting satellites, and the transition to digital broadcasting is also planned in terrestrial broadcasting systems.
[0003]
In broadcasting stations for digital broadcasting, it is also considered to perform character multiplex broadcasting in which, for example, caption data is multiplexed and transmitted in a broadcast signal, as in analog broadcasting.
[0004]
By the way, in the broadcasting station of the above digital broadcasting, it is necessary to check in each studio whether or not the caption data multiplexed in the broadcast signal is correct data. However, in digital broadcasting, subtitle data to be multiplexed cannot be displayed as it is on a display as in analog broadcasting.
[0005]
[Problems to be solved by the invention]
As described above, in digital broadcasting, caption data cannot be displayed on a display as it is like analog broadcasting, and an effective means has been desired.
[0006]
An object of the present invention is to provide a digital teletext signal monitoring apparatus and a digital teletext signal monitoring method capable of checking the contents of a digital teletext signal multiplexed with a program information signal in a digital broadcast program transmission system. There is to do.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is configured as follows.
[0008]
(1) Digital information including at least content information to be displayed together with program material in digital broadcast program information signal including material information indicating program material and control information related to the program, and management information related to the content A digital teletext signal monitoring apparatus for monitoring a digital teletext signal applied to a digital broadcast program transmitting apparatus for multiplexing and transmitting teletext signals, and for extracting a digital teletext signal to be multiplexed with a program information signal Teletext signal extraction means, multiplexed signal generation means for multiplexing the digital teletext signal extracted by the digital teletext signal extraction means with a program information signal generated in a pseudo manner, and generating a multiplexed signal, and the multiplexing Display means for displaying the multiplexed signal generated by the signal generation means. That.
[0009]
According to the invention of (1), the extracted digital character broadcast signal is multiplexed with the pseudo material information and the pseudo control information to generate a multiplexed signal, and the digital character broadcast signal is converted into the pseudo material information based on the pseudo control information. At the same time, it will be displayed on the display. Therefore, the monitor checks whether the content of the digital teletext signal to be broadcast is correct and displayed at the correct position by looking at the digital teletext signal displayed on the normal display. can do.
[0010]
(2) In the above object, the digital character broadcast signal extracting means for extracting the digital character broadcast signal to be multiplexed on the program information signal, and the digital character broadcast signal extracted by the digital character broadcast signal extracting means And signal analysis means for analyzing the contents of the management information, and display means for displaying the analysis result by the signal analysis means.
[0011]
According to the invention of (2), the contents of the management information and the content information in the extracted digital teletext signal are analyzed, and the analysis result is displayed on the display. Therefore, the observer does not need to prepare the pseudo material information and the pseudo control information by looking at the analysis result displayed on the display unit, and checks the detailed contents of the digital teletext signal before being multiplexed. Can do.
[0012]
(3) In the above object, a digital character broadcast signal extracting means for extracting a digital character broadcast signal to be multiplexed on the program information signal, and a program for artificially generating the digital character broadcast signal extracted by the digital character broadcast signal extracting means A first processing mode for multiplexing the information signal to generate a multiplexed signal, and a second one for taking in the digital teletext signal extracted by the digital teletext signal extraction means and analyzing the content information content and the management information content A signal processing means having a processing mode, a display means for displaying the output of the signal processing means, and a mode selection control for selectively executing the first and second processing modes in accordance with designation information from the outside. Means.
[0013]
According to the invention of (3), for example, by setting the processing mode for each broadcast program, the content and display position of the content of the digital teletext signal is checked for one broadcast program, while for another program It is possible to check the optimum digital teletext signal for each program, such as checking the detailed contents of the digital teletext signal.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0015]
FIG. 1 is a block diagram showing the configuration of a digital broadcast program transmission system when an embodiment of the digital teletext signal monitoring apparatus of the present invention is applied.
[0016]
1 includes an encoder (ENC) 11, 12, a multiplexer (MUX) 13, an encoding multiplexing control device (EMC) 14, an automatic program transmission control device (APC) 15, an in-station And a clock 16.
[0017]
The encoder 11 compresses and encodes the video signal using an MPEG standard encoding method to generate TS (Transport Stream) data, and outputs the TS (Transport Stream) data to the multiplexer 13. The encoder 12 compresses and encodes the audio signal to generate TS data, and outputs the TS data to the multiplexer 13. The multiplexer 13 multiplexes the outputs of the encoders 11 and 12 and data such as PMT (Program Map Table) and PAT (Program Association Table) output from the encoding and multiplexing control device 14 and sends them as TS for broadcasting. To do. The encoding multiplex control device 14 controls the encoders 11 and 12 and the multiplexer 13 based on the instruction information provided from the automatic program transmission control device 15, the broadcast schedule data, and the knitting time measured by the local clock 16.
[0018]
By the way, the digital broadcast program transmission system of this embodiment further includes a character broadcast transmission device 17, an encoder 18, and a monitor device 19.
[0019]
The teletext transmission device 17 transmits a teletext signal in accordance with an instruction from the automatic program transmission control device 15.
[0020]
The encoder 18 compresses and encodes the teletext signal using the MPEG standard encoding method, generates TS data, and outputs the TS data to the multiplexer 13.
[0021]
The monitor device 19 extracts subtitle data from the output of the encoder 18 and monitors it.
[0022]
FIG. 2 is a block diagram showing the configuration of the monitor device 19 according to an embodiment of the present invention.
[0023]
2, the monitor device 19 includes an extraction unit 191, a multiplexing unit 192, a decoder 193, a video monitor 194, an analysis unit 195, a CRT (Cathode Ray Tube) monitor 196, an error detection unit 197, A changeover switch (SW) 198 is provided.
[0024]
The extraction unit 191 extracts caption data from TS data output from the encoder 18.
[0025]
The multiplexing unit 192 generates a multiplexed signal by multiplexing the pseudo video signal stored in advance and the pseudo control signal including PSI / SI and the like on the caption data extracted by the extracting unit 191.
[0026]
The decoder 193 decodes the multiplexed signal generated by the multiplexing unit 192 into a display format.
[0027]
The video monitor 194 displays the output of the decoder 193.
[0028]
The analysis unit 195 takes in the caption data extracted by the extraction unit 195, analyzes the caption data, and calculates the content of the caption management information and the content of the caption sentence based on the analysis result.
[0029]
The CRT monitor 196 displays the content of the caption management information and the content of the caption text calculated by the analysis unit 195.
[0030]
The error detection unit 197 detects an error in the caption data extracted by the extraction unit 191 and outputs the detection result to the CRT monitor 196 for display.
[0031]
The changeover switch 198 selectively executes the processing of the multiplexing unit 192 and the processing of the analysis unit 195 in accordance with an external operation.
[0032]
Next, the operation according to the above configuration will be described.
Subtitle data is extracted from the TS data output from the encoder 18 by the extraction unit 191. Here, when processing by the multiplexing unit 192 is selected by the changeover switch 198, the multiplexing unit 192 generates a multiplexed signal by multiplexing the pseudo video signal and the pseudo control signal on the caption data.
[0033]
The multiplexed signal is converted into a display format by the decoder 193, and then the caption data and the pseudo video signal are displayed on the video monitor 194 based on the pseudo control signal. The display screen by the video monitor 194 is, for example, an NTSC screen with an aspect ratio of 4: 3, as shown in FIG.
[0034]
Therefore, the supervisor can check the content and display position of the caption information by looking at the display screen of the video monitor 194.
[0035]
On the other hand, when the processing by the analysis unit 195 is selected by the changeover switch 198, the analysis unit 195 calculates the content of the caption management information and the content of the caption text data in the caption data. The contents of the caption management information include language code, character encoding type, display format, display mode, group information, and the like. Further, the content of the caption text includes the content content, the display position, and the like.
[0036]
The contents of the caption management information and the caption text are displayed on the CRT monitor 196. Therefore, the supervisor can check the detailed contents of the caption data by looking at the display screen of the CRT monitor 196.
[0037]
The caption data extracted by the extraction unit 191 is supplied to the error detection unit 197. The error detection unit 197 performs the following error detection by comparing the caption data with the reference data.
An error where the continuous index is not continuous.
An error that external character data was not received even though external characters were used in the caption text data.
Error when data length item is not correct.
Error due to CRC16 calculation error.
[0038]
The detection result by the error detection unit 197 is displayed on the CRT monitor 196. For this reason, the monitor can immediately recognize the abnormality of the caption data by looking at the display screen of the CRT monitor 196, and can quickly take a countermeasure.
[0039]
As described above, in the above embodiment, the subtitle data extracted by the extraction unit 191 is multiplexed with the pseudo video signal and the pseudo control signal by the multiplexing unit 192 to generate a multiplexed signal, and this multiplexed signal is decoded by the decoder. After decoding by 193, the caption data is displayed on the video monitor 194 together with the pseudo video signal based on the pseudo control signal. Therefore, the supervisor can check whether the content of the caption data to be broadcast is correct or displayed at the correct position by viewing the video displayed on the video monitor 194.
[0040]
In the above embodiment, the contents of the caption management information and the caption text data in the caption data extracted by the extraction unit 191 are calculated by the analysis unit 195, and the contents of the caption management information and the caption text are stored in the CRT monitor 196. It is trying to display. Therefore, the supervisor does not need to prepare the pseudo video signal and the pseudo control signal by looking at the contents of the caption management information and the caption text displayed on the CRT monitor 196, and the caption data to be broadcast is not necessary. Detailed contents can be checked.
[0041]
In the above embodiment, for example, by setting the processing by the multiplexing unit 192 or the processing by the analysis unit 195 for each broadcast program with the changeover switch 198, the content and display position of the content of the caption data for a certain broadcast program On the other hand, the optimal subtitle data can be checked for each program, such as checking the detailed contents of subtitle data for another program.
[0042]
Furthermore, in the above embodiment, if the error detection unit 197 detects the error by comparing the caption data with the reference data and displays the error on the CRT monitor 196, the abnormality of the caption data to be broadcast can be quickly detected. The supervisor can be notified, and the countermeasures can be taken quickly.
[0043]
The present invention is not limited to the above embodiment. For example, in the above-described embodiment, an example in which both the multiplexing unit 192 and the analysis unit 195 are provided has been described. However, only one of the multiplexing unit 192 and the analysis unit 195 may be provided as necessary.
[0044]
In the above-described embodiment, an example in which caption data associated with a program is handled has been described. However, a digital teletext signal such as temporary news other than caption data may be handled.
[0045]
In the above embodiment, the extraction unit 191, the multiplexing unit 192, the analysis unit 195, the error detection unit 197, and the changeover switch 198 have been described in terms of hardware configuration. However, as illustrated in FIG. The processing of the unit 192, the analysis unit 195, the error detection unit 197, and the changeover switch 198 may be realized by software processing by the monitor control unit 200 such as a CPU.
[0046]
When TS data is input from the encoder 18, the monitor control unit 200 starts a control process as shown in FIG.
[0047]
When this control process is started, the monitor control unit 200 extracts caption data from the input TS data (step ST5a), and then compares the extracted caption data with reference data to determine whether there is an error. Perform (step ST5b).
[0048]
If there is an error (Yes), the monitor control unit 200 outputs information indicating the error to the CRT monitor 196.
[0049]
On the other hand, if there is no error (No), monitor control unit 200 confirms its processing mode and determines whether or not to perform multiplexing (step ST5c).
[0050]
If the processing mode is multiplexing (Yes), the monitor control unit 200 generates a multiplexed signal by multiplexing the pseudo video signal and the pseudo control signal stored in the caption data in advance (step ST5d). The multiplexed signal is output to the decoder 193 (step ST5e).
[0051]
On the other hand, if the processing mode is to perform analysis (No), the monitor control unit 200 executes subtitle data analysis processing (step ST5f), and the content of the subtitle management information in the subtitle data and the subtitles based on the analysis result. The content of the sentence is calculated (step ST5g), and the calculation result is output to the CRT monitor 196 (step ST5h).
[0052]
Thereafter, each time TS data is input, the processes of steps ST5a to ST5h are repeatedly executed.
[0053]
Therefore, each process of the extraction unit 191, the multiplexing unit 192, the analysis unit 195, the error detection unit 197, and the changeover switch 198 can be realized by the monitor control unit 200, and an increase in manufacturing cost of the monitor device 19 itself can be suppressed. Can do.
[0054]
In the above embodiment, an example in which the error of the caption data is displayed on the CRT monitor 196 has been described. However, the error may be displayed on the video monitor 194.
[0055]
In addition, the configuration of the digital broadcast program transmission system, the configuration of the monitor device, the type of monitor, the subtitle data multiplexing control procedure, the analysis control procedure, the error detection procedure, the type and content of the digital teletext signal, etc. Various modifications can be made without departing from the scope of the present invention.
[0056]
【The invention's effect】
As described above in detail, according to the present invention, in the digital broadcast program transmission system, the digital character broadcast signal monitor device and the digital character which can check the contents of the digital character broadcast signal multiplexed on the program information signal A broadcast signal monitoring method can be provided.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a digital broadcast program transmission system to which the present invention is applied.
FIG. 2 is a block diagram showing a configuration of a monitor device according to an embodiment of the present invention.
FIG. 3 is a diagram showing an example of subtitle information display.
FIG. 4 is a block diagram showing a configuration of a monitor device according to another embodiment of the present invention.
FIG. 5 is a flowchart shown for explaining the operation of the monitor control unit shown in FIG. 4;
[Explanation of symbols]
11, 12, 18 ... encoder (ENC),
13: Multiplexer (MUX),
14: Encoding multiplex control device (EMC),
15 ... Automatic program transmission control device (APC),
16 ... Internal clock,
17 ... teletext broadcasting device,
19 ... monitor device,
191 ... Extraction unit,
192: Multiplexer,
193: Decoder,
194 ... Video monitor,
195 ... analysis unit,
196 ... CRT monitor,
197 ... error detection unit,
198 ... changeover switch,
200: Monitor control unit.

Claims (5)

Digital teletext signal including material information indicating program material, digital broadcast program information signal including control information related to the program, content information indicating content to be displayed together with at least the program material, and management information related to the content A digital teletext signal monitor for monitoring the digital teletext signal, applied to a digital broadcast program transmitter for transmitting
A digital teletext signal extraction means for extracting a digital teletext signal to be multiplexed with the program information signal;
Multiplexed signal generating means for generating a multiplexed signal by multiplexing the digital character broadcast signal extracted by the digital character broadcast signal extracting means with a program information signal generated in a pseudo manner;
A digital teletext signal monitoring apparatus, comprising: display means for displaying the multiplexed signal generated by the multiplexed signal generating means. Digital teletext signal including material information indicating program material, digital broadcast program information signal including control information related to the program, content information indicating content to be displayed together with at least the program material, and management information related to the content A digital teletext signal monitor for monitoring the digital teletext signal, applied to a digital broadcast program transmitter for transmitting
A digital teletext signal extraction means for extracting a digital teletext signal to be multiplexed with the program information signal;
A first processing mode for generating a multiplexed signal by multiplexing the digital teletext signal extracted by the digital teletext signal extraction means on a program information signal generated in a pseudo manner, and the digital teletext signal extraction means A signal processing means having a second processing mode for capturing a digital teletext signal and analyzing the content information and the management information;
Display means for displaying the output of the signal processing means;
A digital teletext signal monitoring apparatus comprising: mode selection control means for selectively executing the first and second processing modes in accordance with designation information from the outside. Claim 1, wherein the digital text analysis takes in digital teletext signal extracted by the broadcast signal extraction means, characterized by comprising the error detection means for detecting an error in said digital teletext signal on the basis of the analysis result Or the digital teletext signal monitoring apparatus according to 2 above. Digital teletext signal including material information indicating program material, digital broadcast program information signal including control information related to the program, content information indicating content to be displayed together with at least the program material, and management information related to the content A digital teletext signal monitoring method for monitoring the digital teletext signal applied to a digital broadcast program transmitting apparatus that multiplexes and transmits
A first step of extracting a digital teletext signal to be multiplexed with the program information signal;
A second process of generating a multiplexed signal by multiplexing the digital teletext signal extracted in the first process with a program information signal generated in a pseudo manner;
A digital teletext signal monitoring method, comprising: a third step of displaying the multiplexed signal generated in the second step on a display. Digital teletext signal including material information indicating program material, digital broadcast program information signal including control information related to the program, content information indicating content to be displayed together with at least the program material, and management information related to the content A digital teletext signal monitoring method for monitoring the digital teletext signal applied to a digital broadcast program transmitting apparatus that multiplexes and transmits
A first step of extracting a digital teletext signal to be multiplexed with the program information signal;
In response to an instruction from the outside, the digital teletext signal extracted in the first process is multiplexed with the program information signal generated in a pseudo manner to generate a multiplexed signal, and extracted in the first process. A second step of capturing a digital teletext signal and selectively executing a process of analyzing the content information and the management information;
A digital teletext signal monitoring method, comprising: a third step of displaying a processing result of the second step on a display device.

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