CN110519629A - A kind of simple intelligent EPG calibration method based on screenshot - Google Patents
A kind of simple intelligent EPG calibration method based on screenshot Download PDFInfo
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- CN110519629A CN110519629A CN201910806375.XA CN201910806375A CN110519629A CN 110519629 A CN110519629 A CN 110519629A CN 201910806375 A CN201910806375 A CN 201910806375A CN 110519629 A CN110519629 A CN 110519629A
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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
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4332—Content storage operation, e.g. storage operation in response to a pause request, caching operations by placing content in organized collections, e.g. local EPG data repository
-
- 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
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4334—Recording operations
-
- 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
- H04N21/47—End-user applications
- H04N21/482—End-user interface for program selection
-
- 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]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/845—Structuring of content, e.g. decomposing content into time segments
- H04N21/8455—Structuring of content, e.g. decomposing content into time segments involving pointers to the content, e.g. pointers to the I-frames of the video stream
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Databases & Information Systems (AREA)
- Human Computer Interaction (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
The invention discloses a kind of simple intelligent EPG calibration method based on screenshot.The video segment that it records video segment acceptance system generates screenshot, utilize picture comparison algorithm, pass through the preliminary pretreatment of thick school process, in conjunction with the EPG information of importing, select the slice at corresponding EPG time point, enter back into thin school process, further in thick school process, timeslice content after screening presses a second screenshot again, and by making comparisons to by otherness before and after second screenshot, estimating each timeslice includes the continuity before and after programme content, the correct program beginning and ending time is estimated with this, and provide interface, in order to artificial quick selected marker, and the EPG information after correction is imported and generates the electronic program list after correction.The beneficial effects of the present invention are: promoting the efficiency and accuracy of EPG calibration by the logic function for the comparison for increasing screenshot and screenshot, reduce artificial.
Description
Technical field
The present invention relates to videos to handle correlative technology field, refers in particular to a kind of simple intelligent EPG calibration based on screenshot
Method.
Background technique
It is to use that electronic program list also known as EPG (Electronic Program Guide, rear abbreviation EPG), which are IPTV systems,
Family provides the Entry Interface of service, provides index and navigation for various IPTV services, is that user is essential using IPTV service
Operating platform.Since electronic program list is all to make in advance, occurs some columns if intermediate and intercut or play extension, and
Break for commercialsy etc., it will lead to the subsequent entire inconsistent situation of electronic program list column information, influence user's program request, and most of
Time at all only one rough time points of program listing need to reaffirm and be accurate to if necessary to secondary editor's material
The time point of the program listing of second.
The calibrating mode of conventional electronic program list at present is all to carry out manual calibration using pure manual type, needs tissue
Manpower real time inspection broadcast items and real-time mark update, it is time-consuming and laborious, and as the increase human cost of channel is also required to
It is synchronous to increase.
Summary of the invention
The present invention be in order to overcome the above deficiencies in the prior art, provide a kind of calibration efficiency it is high based on cut
The simple intelligent EPG calibration method of figure.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of simple intelligent EPG calibration method based on screenshot, including video segment acceptance system and screenshot compare correction
System, in which: live video stream is recorded as video segment by video segment acceptance system；Screenshot compares correction system and passes through thick school
Process, thin school process carry out the correcting logic that comparison in difference carries out EPG；Specific steps are as follows:
(1) live video stream is recorded as according to fixed time interval by video segment by video segment acceptance system；
(2) video segment that video segment acceptance system is recorded is generated into screenshot and passes through thick school using picture comparison algorithm
The preliminary pretreatment of process filters out the corresponding electronic program EPG beginning and ending time in conjunction with the electronic program EPG information of importing
The slice of point；
(3) enter thin school process, a second screenshot is pressed again to the slice content after screening, and by by second screenshot pre-post difference
The opposite sex is made comparisons, and is estimated each slice and is included the continuity before and after programme content, estimates the correct program beginning and ending time with this, and
Interface is provided, in order to artificial quick selected marker, and the EPG information after correction is imported and generates the electronic programming after correction
It is single.
It has been popularized at present by the scheme of artificial EPG calibration system, this system can be base in original EPG calibration system
On plinth, the logic function of the comparison by increasing screenshot and screenshot reconstructs the simple intelligent EPG calibration method based on screenshot,
And the simple intelligent EPG calibration method based on screenshot after reconstructing can be used as the auxiliary system of original EPG calibration system, mention
The efficiency and accuracy of EPG calibration are risen, is reduced artificial.
Preferably, the video segment for recording video segment acceptance system generates screenshot and constitutes screenshot in step (2)
List, in thick school process, specific steps are as follows: according to the external EPG information imported, filter out and meet cutting for EPG information node
Figure List confirms corresponding programme content screenshot sequence, and again according to EPG to comparing two-by-two before and after the screenshot in screenshot list
Information further confirms that the front and back screenshot for meeting the switching of programme content corresponding to EPG Pgmtime point, and confirms corresponding video
Slice.
Preferably, in step (3), in thin school process, specific steps are as follows: by thick school process, screen
Video segment, again according to 1 second time interval, screenshot constituted new screenshot list again, and again will be in new screenshot list
Screenshot before and after compare two-by-two, confirm corresponding programme content screenshot sequence, the front and back screenshot of corresponding programme content switching, and confirm
The specific time of corresponding program switching.
Preferably, it is based on first in video segment that the screenshot that video segment generates, which obtains logic, in step (2)
I frame in GOP；In step (3), it is by the acquisition logic of second screenshot again to the slice content after screening: by video segment
In each GOP in I frame obtain out, wherein 1 second be a GOP；In step (2) and step (3), before and after screenshot two-by-two
The operation logic of comparison is: being compared by the numerical value that former and later two screenshots correspond to same pixel point, is recognized on the screenshot of front and back
When for the value higher than a being consistent, front and back picture it is continuous, wherein the value of a is between 80-90% empirical value, that is, preset threshold, and
Then think that front and back image content is unrelated lower than 30% empirical value.
The beneficial effects of the present invention are: promoting EPG by the logic function for the comparison for increasing screenshot and screenshot and calibrating work
The efficiency and accuracy of work are reduced artificial.
Detailed description of the invention
Fig. 1, Fig. 2 are flow charts of the method for the present invention.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description.
In the embodiment described as shown in Figure 1, Figure 2, a kind of simple intelligent EPG calibration method based on screenshot, including video are cut
Piece acceptance system and screenshot compare correction system, in which: live video stream is recorded as video segment by video segment acceptance system；
Screenshot compares correction system and carries out the correcting logic that comparison in difference carries out EPG by thick school process, thin school process；Concrete operations step
It is rapid as follows:
(1) live video stream is recorded as according to fixed time interval by video segment by video segment acceptance system；
Wherein: the length of the time interval is smaller, is typically chosen 3 seconds；
(2) video segment that video segment acceptance system is recorded is generated into screenshot and passes through thick school using picture comparison algorithm
The preliminary pretreatment of process filters out the corresponding electronic program EPG beginning and ending time in conjunction with the electronic program EPG information of importing
The slice of point；
The video segment that video segment acceptance system is recorded generates screenshot and constitutes screenshot list, in thick school process, tool
Body step are as follows: according to the external EPG information imported, the screenshot list for meeting EPG information node is filtered out, in screenshot list
It is compared two-by-two before and after screenshot, confirms corresponding programme content screenshot sequence, and further confirm that again according to EPG information and meet EPG
The front and back screenshot of the switching of programme content corresponding to Pgmtime point, and confirm corresponding video segment；
(3) enter thin school process, a second screenshot is pressed again to the slice content after screening, and by by second screenshot pre-post difference
The opposite sex is made comparisons, and is estimated each slice and is included the continuity before and after programme content, estimates the correct program beginning and ending time with this, and
Interface is provided, in order to artificial quick selected marker, and the EPG information after correction is imported and generates the electronic programming after correction
It is single；
In thin school process, specific steps are as follows: by thick school process, the video segment screened, again according to 1 second
Screenshot constitutes new screenshot list to time interval again, and will compare two-by-two before and after the screenshot in new screenshot list again, really
Recognize corresponding programme content screenshot sequence, the front and back screenshot of corresponding programme content switching, and confirm corresponding program switching it is specific when
Between.
In step (2), it is based on the I in video segment in first GOP that the screenshot that video segment generates, which obtains logic,
Frame.By taking mpeg encoded as an example, picture (i.e. frame) is divided into tri- kinds of I, P, B by mpeg encoded, and I is intra-coded frame, and P is preceding paragraph prediction
Frame, B are two-way interpolation frames.Simply, I frame is a complete picture, and P frame and B frame recording is change relative to I frame
Change.Do not have the reason of I frame, P frame and B frame can not just decode, be difficult to accurate editing here it is mpeg format and we why
The reason of finely tuning head and tail.There are two parameters for the frame structure of MPEG-2 compression, and one is GOP (Group Of Picture) figure
It, generally can be by coding mode from 1-15 as the length of group；The other is between I frame and P frame B frame quantity, usually 1-2.
The former is theoretically recorded as N, i.e., an I frame occurs inside how many frames；The latter is described as occurring a P frame in how many frame, note
Record is M.
In step (3), it is by the acquisition logic of second screenshot again to the slice content after screening: will be in video segment
I frame in each GOP obtains out, wherein being within 1 second a GOP；In step (2) and step (3), compared two-by-two before and after screenshot
Operation logic be: be compared by the numerical value that former and later two screenshots correspond to same pixel point, think high on the screenshot of front and back
In a value be it is consistent when, front and back picture it is continuous, wherein the value of a is between 80-90% empirical value, that is, preset threshold, and is lower than
30% empirical value then thinks that front and back image content is unrelated.
The basic principle of this EPG calibration system is, by image alignment algorithm, to compare the screenshot of surrounding time piece, pass through
The otherness of screenshot is compared with preset threshold value, confirms the difference size of surrounding time piece programme content, then be based on original EPG
Time point, estimate the correct program beginning and ending time, be accurate to the second.
It has been popularized at present by the scheme of artificial EPG calibration system, this system can be base in original EPG calibration system
On plinth, the logic function of the comparison by increasing screenshot and screenshot reconstructs the simple intelligent EPG calibration method based on screenshot,
And the simple intelligent EPG calibration method based on screenshot after reconstructing can be used as the auxiliary system of original EPG calibration system, mention
The efficiency and accuracy of EPG calibration are risen, is reduced artificial.
Claims (4)
1. a kind of simple intelligent EPG calibration method based on screenshot, characterized in that including video segment acceptance system and screenshot ratio
To correction system, in which: live video stream is recorded as video segment by video segment acceptance system；It is logical that screenshot compares correction system
Cross thick school process, thin school process carries out the correcting logic that comparison in difference carries out EPG；Specific steps are as follows:
(1) live video stream is recorded as according to fixed time interval by video segment by video segment acceptance system；
(2) video segment that video segment acceptance system is recorded is generated into screenshot and passes through thick school process using picture comparison algorithm
Preliminary pretreatment filter out corresponding electronic program EPG beginning and ending time point in conjunction with the electronic program EPG information of importing
Slice；
(3) enter thin school process, a second screenshot is pressed again to the slice content after screening, and by by otherness before and after second screenshot
It makes comparisons, estimates each slice and include the continuity before and after programme content, the correct program beginning and ending time is estimated with this, and provide
Interface in order to artificial quick selected marker, and the EPG information after correction is imported and generates the electronic program list after correction.
2. a kind of simple intelligent EPG calibration method based on screenshot according to claim 1, characterized in that in step (2)
In, the video segment that video segment acceptance system is recorded generates screenshot and constitutes screenshot list, in thick school process, specific steps
Are as follows: according to the external EPG information imported, the screenshot list for meeting EPG information node is filtered out, before the screenshot in screenshot list
It compares two-by-two afterwards, confirms corresponding programme content screenshot sequence, and further confirmed that again according to EPG information when meeting EPG program
Between put the front and back screenshot of corresponding programme content switching, and confirm corresponding video segment.
3. a kind of simple intelligent EPG calibration method based on screenshot according to claim 1, characterized in that in step (3)
In, in thin school process, specific steps are as follows: by thick school process, the video segment screened, again according to 1 second time
Screenshot constitutes new screenshot list again at interval, and will compare two-by-two before and after the screenshot in new screenshot list again, confirmation pair
Programme content screenshot sequence, the front and back screenshot of corresponding programme content switching are answered, and confirms the specific time of corresponding program switching.
4. a kind of simple intelligent EPG calibration method based on screenshot according to claim 2 or 3, characterized in that in step
(2) in, it is based on the I frame in video segment in first GOP that the screenshot that video segment generates, which obtains logic,；In step (3),
It is by the acquisition logic of second screenshot again to the slice content after screening: the I frame in each GOP in video segment is obtained out
Come, wherein being within 1 second a GOP；In step (2) and step (3), the operation logic compared two-by-two before and after screenshot is: by preceding
The numerical value that latter two screenshot corresponds to same pixel point is compared, when it is consistent for being thought on the screenshot of front and back higher than the value of a, front and back
Picture it is continuous, wherein the value of a is between 80-90% empirical value, that is, preset threshold, and then thinks front and back lower than 30% empirical value
Image content is unrelated.
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