CN113206961B - Television live broadcast key filling signal broadcasting method and system - Google Patents
Television live broadcast key filling signal broadcasting method and system Download PDFInfo
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- CN113206961B CN113206961B CN202110503858.XA CN202110503858A CN113206961B CN 113206961 B CN113206961 B CN 113206961B CN 202110503858 A CN202110503858 A CN 202110503858A CN 113206961 B CN113206961 B CN 113206961B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/265—Mixing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
- H04N21/2404—Monitoring of server processing errors or hardware failure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
- H04N21/2625—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists for delaying content or additional data distribution, e.g. because of an extended sport event
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
- H04N21/42607—Internal components of the client ; Characteristics thereof for processing the incoming bitstream
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
- H04N21/4318—Generation of visual interfaces for content selection or interaction; Content or additional data rendering by altering the content in the rendering process, e.g. blanking, blurring or masking an image region
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/4425—Monitoring of client processing errors or hardware failure
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- Signal Processing (AREA)
- Databases & Information Systems (AREA)
- Computer Networks & Wireless Communication (AREA)
- Studio Circuits (AREA)
Abstract
The invention discloses a broadcasting method and a system of a television live broadcast key filling signal, which adopt a mode of carrying out advanced processing based on a video image comparison result and a time delay mechanism and shorten the error time of the key filling signal content caused by various reasons to the maximum extent. By the method and the system, the full-automatic key up and down operation of the television live broadcast key filling signal is realized, the wrong key filling signal content in the live broadcast signal can be effectively eliminated, the correct key filling signal content is played, only the wrong key filling signal is processed, the original video signal source and other key filling signals are not influenced, and for audiences, the effect of watching the television live broadcast is ensured to be completely unaffected as if the wrong key filling signal never appears.
Description
Technical Field
The application relates to the technical field of broadcast television, in particular to television production and broadcasting.
Background
The television live broadcast key filling signal refers to various video signal input sources which are inserted or synthesized into an original background television signal source on line in the television live broadcast in a key control technology mode, and the video signal input sources comprise subtitles, corner marks, station marks, scrolling, advertisements, small windows and the like. The filling signal of the television live broadcast key can be added in a studio or a television broadcast control center according to the application scene, for example, subtitles, corner marks, advertisements, small windows and the like are added in the studio broadcast control link, and station marks and scrolling are added in the television broadcast control center. Currently, whether domestic or abroad, the insertion of all live television key filling signals is realized on a broadcast guide switching station (including a studio broadcast guide switching station and a television broadcast control center emergency switching station), that is, the key filling signals are inserted in real time and online in the live program process together with the switching of a signal source for program production, the input of the switching station is clean original signals, and the output of the switching station is a synthesized video signal source with various key filling signals. For the emergency of live television broadcasting, no matter any one key filling signal fails, two ways are generally adopted for emergency at present: one is that the technician immediately stops the insertion of the error key fill signal; the other is to switch the emergency video signal source (which can be a clean original background video signal source or other general emergency video sources) immediately at the next stage unit, for example, in the emergency switching process of a television broadcasting center when the studio has an error key filling signal. Because live television broadcasting is real-time, the two emergency modes can only prevent the occurrence of wrong key filling signals again after processing, but can not process the wrong key filling signals before processing, and a section of television broadcasting signals containing the wrong key filling signals are still presented to audiences. Some live television systems add terminal video delay equipment between a studio and a television broadcast control center, and when a key filling signal fault occurs, an emergency video source is directly switched for emergency before a broadcast signal of the faulty studio reaches a broadcast guide switching table of the television broadcast control center, so that even if the emergency video source is switched for emergency, audiences cannot be prevented from detecting abnormal television broadcast. And when the wrong key filling signal appears on the television broadcast control and guide switching table, the signal can be broadcast only by adopting a mode of directly switching the emergency gasket at the tail end by one cutting. With the development of television packaging technology, key signals inserted into an original live television source in live television are more and more abundant and more, and the influence coefficient on safe broadcast of live television is also larger and larger. The key filling signal is a supplement to the content and information of television broadcasting pictures, and the influence on the whole television broadcasting signal source due to the error of individual key signals is a problem of safe broadcasting which is difficult to process in the current television live broadcasting. In summary, under the current technical conditions, there is no system or method that can effectively process the wrong key filling signal occurring in the live tv broadcast without the viewer's awareness. In this example, a system is provided, by which a method for broadcasting a key filling signal for live television is provided, only a key filling signal that has been in error is processed, an original video signal source and other key filling signals are not affected, and for viewers, as if the key filling signal that has been in error never occurred, the watching effect of the viewers is not affected at all while the safe broadcasting of live television is ensured.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a method for broadcasting the key filling signal of the live television, which adopts a mode of carrying out advanced processing based on a video image comparison result and a time delay mechanism, can shorten the error time of the key filling signal content caused by various reasons to the maximum extent, effectively eliminates the error key filling signal content in the live television signal and broadcasts the correct key filling signal content.
The invention provides a technical scheme as follows:
a method for broadcasting a filling signal of a television live broadcast key is characterized by comprising the following steps:
step (1): up and down keys of live key filling signal
Step (1-1): acquiring the key-up and key-down time of a live key filling signal;
step (1-2): calculating the relative time length of an upper key and a lower key of a live key filling signal;
step (1-3): performing operation of filling signals with upper and lower live broadcast keys on the live broadcast signals in the live broadcast according to the results of the steps (1-1) and (1-2);
step (2): live broadcast signal delay
Carrying out T-second time delay on a television live broadcast signal containing a live broadcast key filling signal;
and (3): up and down keys for overlaying key fill signals
Step (3-1): acquiring the error time of the content of a live key filling signal, the time length of the delay of the live key filling signal and the relative time length of an up key and a down key of the live key filling signal;
step (3-2): calculating the time of the upper key and the lower key of the coverage key filling signal according to the result of the step (3-1);
step (3-3): performing upper and lower key operations of covering key filling signals on the live broadcast signals in the live broadcast according to the results of the steps (3-1) and (3-2);
and (4): up and down keys for correcting key filling signal
Step (4-1): acquiring the key-up and key-down time of the overlay key filling signal;
step (4-2): calculating the time of the upper key and the time of the lower key of the correction key filling signal according to the result of the step (4-1);
step (4-3): and (4) performing up-key and down-key operations of correcting key filling signals on the live broadcast signals in the live broadcast according to the results of the step (4-1) and the step (4-2).
A television live broadcast key filling signal broadcasting system is characterized by comprising:
a live broadcast key unit: key filling signal key-up and key-down operations of normal live broadcast are completed by using a key control technology;
overlay keying unit: the key filling signal coverage erasing operation under the condition of error content of the key filling signal is completed by using a key control technology;
a corrective keying unit: the key control technology is utilized to complete the operation of the upper key and the lower key of the correct content (after correction) key filling signal;
in one embodiment, the live broadcast key control unit further comprises an automatic broadcast control module, wherein the automatic broadcast control module is mainly used for calculating the key-up and key-down time of a live broadcast key filling signal in the live broadcast process according to the situation of a live broadcast program;
in one embodiment, the system further comprises a delay unit, wherein the delay unit delays the television live broadcast signal according to the television safety broadcasting requirement;
in one embodiment, the overlay keying unit further comprises an image comparison module, the module can identify and compare the content of the key filling signal by using video stream screenshot and image content identification technology, and send out an error alarm of the content of the live key filling signal according to a comparison result, and the module also supports manual judgment and sends out alarm information.
The invention has the advantages that:
(1) Under the condition of reserving manual control keying, the full-automatic key-up and key-down operation of a television live key filling signal is realized;
(2) The mode of carrying out advanced processing based on the comparison result of the video images and a delay mechanism is adopted, so that the error time of key filling signal content caused by various reasons can be shortened to the greatest extent;
(3) The method can effectively eliminate the wrong key filling signal content in the live broadcast signal and broadcast the correct key filling signal content, only processes the wrong key filling signal, does not influence the original video signal source and other key filling signals, and has no influence on the watching effect of audiences as if the wrong key filling signal never appears.
Description of the drawings:
the accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is an overall flow diagram of the method of the present invention;
FIG. 2 is a system block diagram of the method of the present invention.
Detailed Description
The present invention will be described in detail with reference to the following drawings, which illustrate preferred embodiments of the present invention and are not to be construed as limiting the invention.
The method and the system for broadcasting the key filling signal of the television live broadcast are mainly applied to synchronous broadcasting of the key filling signal content in the live broadcast process of a television studio. According to the characteristics of live broadcasting in a television studio, key filling signal contents are often broadcasted according to program contents, so that some contents are produced in advance, some contents are produced temporarily on site, and the contents are broadcasted for different durations in a specific time period according to different contents. In order to ensure the broadcasting safety, a main key signal generator and a standby key signal generator (comprising a key filling signal and a key signal) are usually configured, the making and the generating of specific contents are manually operated by operators, when the broadcasting is carried out in a major direct broadcasting mode, the main key filling signal generator and the standby key filling signal generator are usually made and audited by two operators independently for broadcasting, the contents generated by the main key signal generator and the standby key signal generator can be identified and compared automatically in accordance with the consistency by utilizing video stream screenshot and image content identification technology, and the content errors caused by equipment faults or manual operation errors can be basically identified and judged by 100% in cooperation with manual inspection and verification, and the content errors also nearly comprise all content errors.
Fig. 1 and fig. 2 are an overall flowchart and a system block diagram of a broadcast method for a television live key filling signal according to the present invention, and as shown in the figure, a mode of performing advanced processing based on a video image comparison result and a delay mechanism is adopted, so that the error duration of the content of the key filling signal caused by various reasons can be shortened to the greatest extent, the content of the error key filling signal appearing in the live signal can be effectively eliminated, and the correct content of the key filling signal can be broadcast.
The method comprises the following steps:
step (1): up and down keys of live key filling signal
Step (1-1): acquiring the key-up and key-down time of a live key filling signal;
step (1-2): calculating the relative time length of an upper key and a lower key of a live key filling signal;
step (1-3): performing operation of filling signals with upper and lower live broadcast keys on the live broadcast signals in the live broadcast according to the results of the steps (1-1) and (1-2);
step (2): live broadcast signal delay
Carrying out T-second time delay on a television live broadcast signal containing a live broadcast key filling signal;
and (3): up and down keys for overlaying key fill signals
Step (3-1): acquiring the error time of the content of a live broadcast key filling signal, the delay time of the live broadcast signal and the relative time of an upper key and a lower key of the live broadcast key filling signal;
step (3-2): calculating the time of the upper key and the lower key of the coverage key filling signal according to the result of the step (3-1);
step (3-3): performing up and down key operation of covering key filling signals on the live broadcast signals in the live broadcast according to the results of the steps (3-1) and (3-2);
and (4): up and down keys for correcting key filling signal
Step (4-1): acquiring the key-up and key-down time of the overlay key filling signal;
step (4-2): calculating the time of the upper key and the time of the lower key of the correction key filling signal according to the result of the step (4-1);
step (4-3): and (4) performing up-key and down-key operations of correcting key filling signals on the live broadcast signals in the live broadcast according to the results of the step (4-1) and the step (4-2).
This embodiment still includes a TV live broadcast key filling signal broadcasting system, and its characterized in that includes:
a live broadcast key unit: key filling signal key-up and key-down operations of normal live broadcast are completed by using a key control technology;
overlay keying unit: the key filling signal coverage erasing operation under the condition of error content of the key filling signal is completed by using a key control technology;
a corrective keying unit: the key control technology is utilized to complete the operation of the upper key and the lower key of the correct content (after correction) key filling signal;
in one embodiment, the live broadcast key control unit further comprises an automatic broadcast control module, wherein the automatic broadcast control module is mainly used for calculating the key-up and key-down time of a live broadcast key filling signal in the live broadcast process according to the situation of a live broadcast program;
in one embodiment, the system further comprises a delay unit, wherein the delay unit delays the television live broadcast signal according to the television safety broadcasting requirement;
in one embodiment, the overlay keying unit further comprises an image comparison module, the module can identify and compare the content of the key filling signal by using video stream screenshot and image content identification technology, and send out an error alarm of the content of the live key filling signal according to a comparison result, and the module also supports manual judgment and sends out alarm information.
As shown in fig. 1 and 2, in normal live broadcasting, the live broadcasting keying unit obtains the times of the up key and the down key of the live broadcasting key filling signal from the automatic broadcasting control module, calculates the relative duration of the operation of the up key and the down key of the live broadcasting key filling signal, and controls the operation of the up key and the down key of the live broadcasting key filling signal according to the obtained times of the up key and the down key. Under the normal live broadcast state, the operation result is consistent with the result required by the program broadcasting list (namely, the automatic broadcasting control). When the content of the live key filling signal is correct, the live television belongs to a normal live broadcasting state, the live key filling signal is in a normal broadcasting state, and the overlay key filling signal and the correction key filling signal are in a non-broadcasting state. When the content of the live key filling signal is wrong, the error state can be artificially found or automatically detected (through an image comparison module) to give an alarm, at the moment, the live key filling signal is in a normal broadcasting state, but the live television is in an abnormal state, and in order to eliminate the influence on the normal live television signal caused by the content error of the live key filling signal, the broadcast state is started to be carried out by the overlay key filling signal and the correction key filling signal. When an alarm occurs, the overlay key control unit acquires the live broadcast key filling signal error time, the live broadcast signal delay time length and the live broadcast key filling signal up-down key relative time length from the image contrast module (including artificial detection), the delay unit and the live broadcast key control unit, calculates the overlay key filling signal up-down key time and carries out overlay key filling signal up-down key operation in the delay live broadcast. Meanwhile, the correction key control unit acquires the upper key time and the lower key time of the coverage key filling signal from the coverage key control unit, calculates the upper key time and the lower key time of the correction key filling signal, and carries out the upper key operation and the lower key operation of the correction key filling signal in the live broadcasting.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and additions can be made without departing from the method of the present invention, and these modifications and additions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A broadcasting method of a television live broadcast key filling signal is characterized by comprising the following steps:
filling up and down keys of a signal by a live key;
live broadcast signal delay;
when the content of the live key filling signal is wrong, covering key filling signal up and down keys within a set delay time;
and when the upper key and the lower key of the key filling signal are covered, the content of the original live key filling signal is corrected, and the upper key and the lower key of the correction key filling signal are corrected within a set delay time.
2. The method of claim 1, wherein live key filling signal up and down keys further comprises:
acquiring the key up and key down time of a key filling signal in the live broadcasting process;
calculating the time difference of the upper key moment and the lower key moment of the live key filling signal so as to obtain the relative duration of the upper key and the lower key;
the live key populates the up and down keys of the signal.
3. The method of claim 1 wherein delaying the live broadcast signal provides an execution time for correcting the content of the keyfilling signal.
4. The method of claim 1, wherein overlaying key fill signal up and down keys comprises:
acquiring image comparison result information and generating an alarm;
acquiring the key up and key down time and time of a live key filling signal;
calculating the time and duration of the up and down keys of the overlay key filling signal;
the up and down keys of the overlay key fill signal.
5. The method of claim 1, wherein rectifying key fill signal up and down keys comprises;
acquiring the key up and down time and duration of the coverage key filling signal;
calculating the key up and down time and duration of the correction key filling signal;
the leveling keys fill the up and down keys of the signal.
6. The method as claimed in claim 4, characterized in that the live broadcast key filling signal error time, the live broadcast signal delay time length and the live broadcast key filling signal up-down key relative time length are obtained from the image contrast module (including human detection), the delay unit and the live broadcast key control unit, the overlay key filling signal up-down key time is calculated, and the overlay key filling signal up-down key operation is carried out in the delay live broadcast; meanwhile, the correction key control unit acquires the time of the upper key and the time of the lower key of the coverage key filling signal from the coverage key control unit, calculates the time of the upper key and the time of the lower key of the correction key filling signal, and carries out the operation of the upper key and the lower key of the correction key filling signal in the live broadcasting.
7. A system for broadcasting a tv live key fill signal for performing the method of any one of claims 1 to 6, comprising:
the live broadcast keying unit completes the key-up and key-down operations of the key filling signal of normal live broadcast by using a keying technology;
the overlay key control unit is used for finishing the overlay erasing operation of the key filling signal under the condition that the content of the key filling signal is wrong by using a key control technology;
and the correction keying unit completes the operation of the upper key and the lower key of the correct content (corrected) key filling signal by using the keying technology.
8. The system of claim 7, wherein the live key control unit further comprises an automatic broadcast control module for calculating the up and down key timings of the live key fill signal during the live broadcast process based on the status of the live program.
9. The system of claim 7, wherein the overlay key unit further comprises an image comparison module, the module can use video stream capture and image content recognition technology to identify and compare the content of the key filling signal, and send an error alarm of the content of the live key filling signal according to the comparison result, and the module also supports human judgment and sends an alarm message.
10. The system of claim 7, further comprising a delay unit for delaying the live television signal according to the safe television broadcasting requirement.
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| CN102638697A (en) * | 2011-02-14 | 2012-08-15 | 索尼公司 | Image processing apparatus and image processing method, and program therefor |
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| JP5573814B2 (en) * | 2011-10-26 | 2014-08-20 | コニカミノルタ株式会社 | Device having display unit for displaying screen, user interface control method, and user interface control program |
| CN104521185B (en) * | 2012-08-07 | 2018-03-30 | 松下知识产权经营株式会社 | Information terminal, method for information display, computer readable recording medium storing program for performing and server |
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| JP2008113301A (en) * | 2006-10-31 | 2008-05-15 | Hitachi Ltd | Video transmitter and transmitting method |
| CN102638697A (en) * | 2011-02-14 | 2012-08-15 | 索尼公司 | Image processing apparatus and image processing method, and program therefor |
| CN109885271A (en) * | 2019-03-18 | 2019-06-14 | 青岛海信电器股份有限公司 | Data display and treating method, device and electronic equipment |
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