CN105392000B - A kind of alignment schemes and device of video frame rate conversion - Google Patents
A kind of alignment schemes and device of video frame rate conversion Download PDFInfo
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- CN105392000B CN105392000B CN201510719764.0A CN201510719764A CN105392000B CN 105392000 B CN105392000 B CN 105392000B CN 201510719764 A CN201510719764 A CN 201510719764A CN 105392000 B CN105392000 B CN 105392000B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0127—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level by changing the field or frame frequency of the incoming video signal, e.g. frame rate converter
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Abstract
The present invention relates to the alignment schemes and device of a kind of conversion of video frame rate, wherein method includes：When the frame per second of video is converted into the second frame per second by the first frame per second, target frame number that each gop file when the frame per second for calculating the video is the second frame per second in the corresponding video includes；When the target frame number is non-integer, the target frame number is rounded to zero, obtains the practical frame number that each gop file includes；Calculate the frame number difference between the target frame number and the practical frame number；It is determined according to the frame number difference and the corresponding target gop file number of a frame is formed by the frame number difference；The video is divided into multiple gop file groups according to the target gop file number, and adds a frame pre-set image in each gop file group, wherein the number for the gop file for including in each gop file group is equal to the target gop file number.By the technical solution, the alignment of frame per second pre- and post-conversion is realized.
Description
Technical field
The alignment schemes and device converted the present invention relates to technical field of video processing more particularly to a kind of video frame rate.
Background technique
By the development of multi-media processing technology in recent years, frame per second conversion is not only used between video format and standard
It is converted, also is used to enhance the total quality of video, and for the video after progress frame per second conversion, with the view before conversion
Frequency can not achieve alignment on frame number.Therefore, the alignment for how targetedly carrying out frame per second conversion, becomes current multimedia
The highly important research topic in field.
Summary of the invention
The embodiment of the present invention provides the alignment schemes and device of a kind of video frame rate conversion, including following technical solution：
According to a first aspect of the embodiments of the present invention, a kind of alignment schemes of video frame rate conversion are provided, including：
When the frame per second of video is converted into the second frame per second by the first frame per second, the frame per second for calculating the video is the second frame per second
When the corresponding video in each gop file target frame number for including；
When the target frame number is non-integer, the target frame number is rounded to zero, obtains each gop file packet
The practical frame number contained；
Calculate the frame number difference between the target frame number and the practical frame number；
It is determined according to the frame number difference and the corresponding target gop file number of a frame is formed by the frame number difference；
The video is divided into multiple gop file groups according to the target gop file number, and in each gop file
A frame pre-set image is added in group, wherein the number for the gop file for including in each gop file group is equal to the target GOP text
Part number.
In one embodiment, the method also includes：
A frame pre-set image is added in the end of file of each gop file group.
In one embodiment, the method also includes：
The number for the gop file for including according to each gop file group and preset point of addition computation rule determine
Target point of addition adds a frame pre-set image on the target point of addition.
In one embodiment, the method also includes：
It is default according at least frame image before the point of addition of the frame pre-set image, or according to a frame
An at least frame image before and after the point of addition of image, determines the pre-set image.
In one embodiment, it is every in the corresponding video when frame per second for calculating the video is the second frame per second
The target frame number that a gop file includes, including：
The duration calculation of corresponding each gop file includes when according to first frame per second frame number and every frame image is each
The total duration of gop file；
According to each gop file total duration and second frame per second, the target that each gop file includes is calculated
Frame number.
According to a second aspect of the embodiments of the present invention, a kind of alignment means of video frame rate conversion are provided, which is characterized in that
Including：
First computing module, for calculating the view when the frame per second of video is converted into the second frame per second by the first frame per second
The target frame number that each gop file of the frame per second of frequency when being the second frame per second in the corresponding video includes；
Floor module, for the target frame number being rounded to zero, is obtained described when the target frame number being non-integer
The practical frame number that each gop file includes；
Second computing module, for calculating the frame number difference between the target frame number and the practical frame number；
Number determining module forms the corresponding target of a frame by the frame number difference for determining according to the frame number difference
Gop file number；
Image adding module, for the video to be divided into multiple gop files according to the target gop file number
Group, and a frame pre-set image is added in each gop file group, wherein for the gop file for including in each gop file group
Number is equal to the target gop file number.
In one embodiment, described image adding module is used for：
A frame pre-set image is added in the end of file of each gop file group.
In one embodiment, described device further includes：
Position determination module, the number and preset addition of the gop file for including according to each gop file group
Position computation rule determines target point of addition, and a frame pre-set image is added on the target point of addition.
In one embodiment, described device further includes：
Image determining module, for at least frame image before the point of addition according to the frame pre-set image, or
Person determines the pre-set image according at least frame image before and after the point of addition of the frame pre-set image.
In one embodiment, first computing module includes：
First computational submodule, corresponding each gop file includes when for according to first frame per second frame number and every
The total duration of each gop file of the duration calculation of frame image；
Second computational submodule, for calculating described every according to each gop file total duration and second frame per second
The target frame number that a gop file includes.
The technical solution that the embodiment of the present invention provides can include the following benefits：
Above-mentioned technical proposal, when the frame per second of video is converted into the second frame per second by the first frame per second, calculating video frame rate is
The target frame number that each gop file when the second frame per second in corresponding video includes, with by target frame number be rounded after actual frame
Difference between number is the video addition image after conversion according to the frame number difference, to realize frame per second pre- and post-conversion
It can be aligned.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
It can the limitation present invention.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.
Fig. 1 is the flow chart of the alignment schemes of video frame rate conversion shown according to an exemplary embodiment.
Fig. 2 is the flow chart of the alignment schemes of another video frame rate conversion shown according to an exemplary embodiment.
Fig. 3 is the flow chart of the alignment schemes of another video frame rate conversion shown according to an exemplary embodiment.
Fig. 4 is the stream of step S102 in a kind of alignment schemes of video frame rate conversion shown according to an exemplary embodiment
Cheng Tu.
Fig. 5 is the block diagram of the alignment means of video frame rate conversion shown according to an exemplary embodiment.
Fig. 6 is the block diagram of the alignment means of another video frame rate conversion shown according to an exemplary embodiment.
Fig. 7 is the block diagram of the alignment means of another video frame rate conversion shown according to an exemplary embodiment.
Fig. 8 is the first computing module in a kind of alignment means of video frame rate conversion shown according to an exemplary embodiment
Block diagram.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended
The example of device and method being described in detail in claims, some aspects of the invention are consistent.
The embodiment of the invention provides a kind of alignment schemes of video frame rate conversion, as shown in Figure 1, the method comprising the steps of
S101-S105：
In step s101, when the frame per second of video is converted into the second frame per second by the first frame per second, the frame per second of video is calculated
The target frame number that each gop file when for the second frame per second in corresponding video includes；
In step s 102, when target frame number is non-integer, target frame number is rounded to zero, obtains each gop file
The practical frame number for including；
In step s 103, the frame number difference between target frame number and practical frame number is calculated；
In step S104, is determined according to frame number difference and the corresponding target gop file number of a frame is formed by frame number difference；
In step s105, video is divided by multiple gop file groups according to target gop file number, and in each GOP
A frame pre-set image is added in file group, wherein the number for the gop file for including in each gop file group is equal to target GOP text
Part number.
In this embodiment, when the frame per second of video is converted into the second frame per second by the first frame per second, calculating video frame rate is
The target frame number that each gop file when the second frame per second in corresponding video includes, with by target frame number be rounded after actual frame
Difference between number is the video addition image after conversion according to the frame number difference, to realize frame per second pre- and post-conversion
It can be aligned.
For the point of addition of a frame pre-set image of addition, can be determined by following two mode：
As shown in Fig. 2, in one embodiment, method further includes step S201：
In step s 201, a frame pre-set image is added in the end of file of each gop file group.
In this embodiment it is possible to the frame pre-set image lacked is added into the end of file in each gop file group, this
Sample is convenient for image addition operation.
As shown in figure 3, in one embodiment, method further includes step S301：
In step S301, the number for the gop file for including according to each gop file group and preset point of addition are calculated
Rule determines target point of addition, and a frame pre-set image is added on target point of addition.
It in this embodiment, can also number according to the gop file that each gop file group includes and preset addition position
Computation rule is set, determines target point of addition, a frame pre-set image is added on target point of addition, for example, each gop file
The number for the gop file that group includes is 5, then according to the calculation method that rounds up, adds 1 frame in the 3rd gop file.
In one embodiment, method further includes：
According at least frame image before the point of addition of a frame pre-set image, or adding according to a frame pre-set image
Add at least frame image before and after position, determines pre-set image.
In the real-time example, can determine the particular content of the image according to the point of addition of pre-set image, i.e., with its institute
Before position or before and after image it is associated.
Such as Fig. 4, in one embodiment, above-mentioned steps S102 includes：
Step S401, the duration meter of corresponding each gop file includes when according to the first frame per second frame number and every frame image
Calculate the total duration of each gop file；
Step S402 calculates the target frame that each gop file includes according to each gop file total duration and the second frame per second
Number.
Below with a specific embodiment technical solution that the present invention will be described in detail.
For example, 25 frame per second is converted to 29.97 frame per second.
If 25 frame per second, the duration of 1 frame is 3600 (crystal oscillator numbers).
If 29.97 frame per second, the duration of 1 frame are 3003.
One GOP has 1500 frames, multiplied by 3600, when a length of 5400000000.
With 5400000000 divided by 3003,1798.2 frames are obtained, that is to say, that a GOP should include 1798.2 frames.By
It is not integer in 1798.2.So first GOP can only include 1798 frames, 0.2 frame is delayed.Every 5 GOP will postpone 1 frame,
So needing to add 1 frame in every 5 GOP, alignment is realized.
, can be in the 5th GOP plus 1 frame, alternatively, first GOP delays 0.2 frame for adding the position of frame, second
GOP delays 0.4 frame, and third GOP delays 0.6 frame, using rounding up, adds a frame when the 3rd GOP.In this way
Just it is advanced by 0.4 frame.To sum up, every 5 GOP need to add 1 frame, and the initial position of frame is added to can be the 3rd or 5 GOP.
Following is apparatus of the present invention embodiment, can be used for executing embodiment of the present invention method.
Fig. 5 is a kind of block diagram of the alignment means of video frame rate conversion shown according to an exemplary embodiment, such as Fig. 5 institute
Show, the alignment means of video frame rate conversion include：
First computing module 51, for when the frame per second of video is converted into the second frame per second by the first frame per second, described in calculating
The target frame number that each gop file of the frame per second of video when being the second frame per second in the corresponding video includes；
Floor module 52, for the target frame number being rounded to zero, obtains institute when the target frame number being non-integer
State the practical frame number that each gop file includes；
Second computing module 53, for calculating the frame number difference between the target frame number and the practical frame number；
Number determining module 54 forms the corresponding mesh of a frame by the frame number difference for determining according to the frame number difference
Mark gop file number；
Image adding module 55, for the video to be divided into multiple gop files according to the target gop file number
Group, and a frame pre-set image is added in each gop file group, wherein for the gop file for including in each gop file group
Number is equal to the target gop file number.
In one embodiment, described image adding module 55 is used for：
A frame pre-set image is added in the end of file of each gop file group.
As shown in fig. 6, in one embodiment, above-mentioned apparatus further includes：
Position determination module 61, the number of the gop file for including according to each gop file group and preset adds
Add position computation rule, determine target point of addition, a frame pre-set image is added on the target point of addition.
As shown in fig. 7, in one embodiment, above-mentioned apparatus further includes：
Image determining module 71, for at least frame image before the point of addition according to the frame pre-set image,
Or according at least frame image before and after the point of addition of the frame pre-set image, determine the pre-set image.
As shown in figure 8, in one embodiment, first computing module 51 includes：
First computational submodule 81, corresponding each gop file includes when for according to first frame per second frame number and
The total duration of each gop file of duration calculation of every frame image；
Second computational submodule 82, for according to each gop file total duration and second frame per second, described in calculating
The target frame number that each gop file includes.
About the device in above-described embodiment, wherein modules execute the concrete mode of operation in related this method
Embodiment in be described in detail, no detailed explanation will be given here.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The shape for the computer program product implemented in usable storage medium (including but not limited to magnetic disk storage and optical memory etc.)
Formula.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of alignment schemes of video frame rate conversion, which is characterized in that including：
When the frame per second of video is converted into the second frame per second by the first frame per second, calculate the video frame per second be the second frame per second when pair
The target frame number that each gop file in the video answered includes；
When the target frame number is non-integer, the target frame number is rounded to zero, obtaining each gop file includes
Practical frame number；
Calculate the frame number difference between the target frame number and the practical frame number；
Target gop file number is determined according to the corresponding number of a frame is formed by frame number difference, wherein forms one by frame number difference
The corresponding number of frame is equal to the target gop file number；
The video is divided into multiple gop file groups according to the target gop file number, and in each gop file group
Add a frame pre-set image, wherein the number for the gop file for including in each gop file group is equal to the target gop file
Number.
2. the method according to claim 1, wherein the method also includes：
A frame pre-set image is added in the end of file of each gop file group.
3. the method according to claim 1, wherein the method also includes：
The number for the gop file for including according to each gop file group and preset point of addition computation rule, determine target
Point of addition adds a frame pre-set image on the target point of addition.
4. according to the method in claim 2 or 3, which is characterized in that the method also includes：
According at least frame image before the point of addition of the frame pre-set image, or according to the frame pre-set image
Point of addition before and after an at least frame image, determine the pre-set image.
5. the method according to claim 1, wherein when the frame per second for calculating the video is the second frame per second pair
The target frame number that each gop file in the video answered includes, including：
The each GOP of duration calculation of corresponding each gop file includes when according to first frame per second frame number and every frame image
The total duration of file；
According to each gop file total duration and second frame per second, the target frame that each gop file includes is calculated
Number.
6. a kind of alignment means of video frame rate conversion, which is characterized in that including：
First computing module, for calculating the video when the frame per second of video is converted into the second frame per second by the first frame per second
The target frame number that each gop file of frame per second when being the second frame per second in the corresponding video includes；
Floor module obtains described each for when the target frame number is non-integer, the target frame number to be rounded to zero
The practical frame number that gop file includes；
Second computing module, for calculating the frame number difference between the target frame number and the practical frame number；
Number determining module forms the corresponding number of a frame by frame number difference for basis and determines target gop file number,
In, the corresponding number of a frame is formed equal to the target gop file number by frame number difference；
Image adding module, for the video to be divided into multiple gop file groups according to the target gop file number, and
A frame pre-set image is added in each gop file group, wherein the number for the gop file for including in each gop file group is equal to
The target gop file number.
7. device according to claim 6, which is characterized in that described image adding module is used for：
A frame pre-set image is added in the end of file of each gop file group.
8. device according to claim 6, which is characterized in that described device further includes：
Position determination module, the number of the gop file for including according to each gop file group and preset point of addition
Computation rule determines target point of addition, and a frame pre-set image is added on the target point of addition.
9. device according to claim 7 or 8, which is characterized in that described device further includes：
Image determining module, for at least frame image before the point of addition according to the frame pre-set image, Huo Zhegen
According at least frame image before and after the point of addition of the frame pre-set image, the pre-set image is determined.
10. device according to claim 6, which is characterized in that first computing module includes：
First computational submodule, the frame number and every frame figure that corresponding each gop file includes when for according to first frame per second
The total duration of each gop file of the duration calculation of picture；
Second computational submodule, for calculating described each according to each gop file total duration and second frame per second
The target frame number that gop file includes.
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| US10602177B1 (en) * | 2018-10-01 | 2020-03-24 | Novatek Microelectronics Corp. | Frame rate up-conversion apparatus and operation method thereof |
| CN113316001B (en) * | 2021-05-25 | 2023-04-11 | 上海哔哩哔哩科技有限公司 | Video alignment method and device |
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| CN101068349A (en) * | 2007-05-29 | 2007-11-07 | 北京中星微电子有限公司 | Method for controlling frame rate and image signal processor |
| CN101316360A (en) * | 2008-07-17 | 2008-12-03 | 杭州华三通信技术有限公司 | Method and device for converting video stream frame rate |
| WO2010032229A1 (en) * | 2008-09-22 | 2010-03-25 | France Telecom | Frame rate up conversion method and system |
| CN103248950A (en) * | 2013-04-28 | 2013-08-14 | 天脉聚源(北京)传媒科技有限公司 | System and method for customizing video frame rate |
| CN104796702A (en) * | 2015-04-22 | 2015-07-22 | 无锡天脉聚源传媒科技有限公司 | H264 video frame rate conversion method and device |
| CN104918051A (en) * | 2015-06-01 | 2015-09-16 | 无锡天脉聚源传媒科技有限公司 | Video processing method and device |
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| CN101068349A (en) * | 2007-05-29 | 2007-11-07 | 北京中星微电子有限公司 | Method for controlling frame rate and image signal processor |
| CN101316360A (en) * | 2008-07-17 | 2008-12-03 | 杭州华三通信技术有限公司 | Method and device for converting video stream frame rate |
| WO2010032229A1 (en) * | 2008-09-22 | 2010-03-25 | France Telecom | Frame rate up conversion method and system |
| CN103248950A (en) * | 2013-04-28 | 2013-08-14 | 天脉聚源(北京)传媒科技有限公司 | System and method for customizing video frame rate |
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