CN105007443A - Video frequency conversion playing method and device - Google Patents
Video frequency conversion playing method and device Download PDFInfo
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Abstract
The invention relates to a video frequency conversion playing method and a video frequency conversion playing device. The method comprises the steps as follows: obtaining a frame rate of a video source; obtaining refresh rate options supported by display equipment; determining a preferred refresh rate according to the refresh rate options supported by the display equipment and the frame rate of the video source, and playing the video with the preferred refresh rate. The method and the device of the invention could enable the video source to be matched with the refresh rate of the display equipment and solve the problem that the frame rate is not matched while playing. The method and the device of the invention could solve the problem that the image play is stuck and unnatural.
Description
Technical field
The present invention relates to video playback field, particularly relate to a kind of video frequency conversion player method.
Background technology
International tel standard mainly contains the large class of NTSC and PAL two, and wherein NTSC is 59.94 image refreshings per second, and PAL is 50 image refreshings per second, television set according to regional standard all can be local standard system support to meet television broadcast standard.Present technical development, makes most of television equipment can support these two kinds of standards simultaneously.
But the frame per second of video source is usually different, such as:
1. TV and film making industry mainly contain three kinds of common frame per second: 24p, 25p, and 30p
2. and conventional 50p and 60p of HDTV.
3.48p is adopted by the people of the bit suddenly movie series of Peter Jackson;
4. the video frame rate that other non-standard capture apparatus are recorded even has the frame per second shooting oneself arranged.
5. common frame per second also has 23.97, the frame per second such as 29.97
Under different standards, the frame per second in displaying video source is not usually mated with display device refreshing frequency like this, sound and picture all will run into broadcasting nature etc. problem.
Summary of the invention
For this reason, need to provide a kind of video frequency conversion player method, solve video and transform the rear unmatched problem of refreshing frequency.
For achieving the above object, inventor provide a kind of video frequency conversion player method, comprise the steps, obtain video source frame per second, obtain the refresh rate option that display device is supported, preferred refresh rate is determined, with preferred refresh rate displaying video according to the refresh rate option of display device support and video source frame per second.
Concrete, also comprise step to determine to show multiplying power factor, describedly determine preferred refresh rate and determine that showing multiplying power factor method is specially: find refresh rate that display device institute supports display device minimum with one of them integral multiple deviation ratio of video source frame per second in refresh rate to support as preferred refresh rate, described integer is show multiplying power factor.
Concrete, also comprise step variable playback video, during described variable playback video, video source every frame picture reproduction time equals display multiplying power factor/preferably refresh rate.
Further, also comprise step, determine frequency conversion multiplying power factor, described frequency conversion multiplying power factor is the preferred refresh rate of equipment/display multiplying power/video source frame per second; And according to frequency conversion multiplying power factor, resampling is carried out to audio frequency.
Concrete, described resampling is the resampling mode not changing tone.
A kind of video frequency conversion playing device, comprises as lower module: acquisition module, processing module, playing module; Described acquisition module is for obtaining video source frame per second, acquisition module is also for obtaining the refresh rate option that display device is supported, processing module determines preferred refresh rate according to the refresh rate option of display device support and video source frame per second, and playing module is used for preferred refresh rate displaying video.
Further, described processing module also shows multiplying power factor for determining, described processing module is determined preferred refresh rate and is determined that showing multiplying power factor method is specially: find refresh rate that display device institute supports display device minimum with one of them integral multiple deviation ratio of video source frame per second in refresh rate to support as preferred refresh rate, described integer is show multiplying power factor.
Further, described playing module is also for variable playback video, and during described variable playback video, video source every frame picture reproduction time equals display multiplying power factor/preferably refresh rate.
Further, processing module is also for determining frequency conversion multiplying power factor, and described frequency conversion multiplying power factor is the preferred refresh rate of equipment/display multiplying power/video source frame per second; Also comprise resampling module, described resampling module is used for carrying out resampling according to frequency conversion multiplying power factor to audio frequency.
Concrete, described resampling is the resampling mode not changing tone.
Be different from prior art, technique scheme is by determining preferred refresh rate, display multiplying power factor, frequency conversion multiplying power factor, the optimum making video source can adapt to display device after treatment plays refresh rate, and carry out frequency-change sampling, the unmatched problem of refresh rate after optimizing prior art down-conversion.
Accompanying drawing explanation
Fig. 1 is the method flow schematic diagram of the present invention's embodiment;
The apparatus module schematic diagram of Fig. 2 position the present invention embodiment.
Description of reference numerals:
21, acquisition module;
23, processing module;
25, playing module;
27, resampling module.
Embodiment
By describe in detail technical scheme technology contents, structural feature, realized object and effect, coordinate accompanying drawing to be explained in detail below in conjunction with specific embodiment.
Refer to Fig. 2, be a kind of video frequency conversion playing device described in the present invention's embodiment, comprise acquisition module 21, processing module 23, playing module 25, resampling module 27.Here please see Figure the 1 a kind of video frequency conversion player method carried out for the playing device of video frequency conversion described in some embodiment again, comprise step S101, obtain video source frame per second; Step S102 obtains the refresh rate option that display device is supported; Step S104 determines preferred refresh rate according to the refresh rate option of display device support and video source frame per second; Step S106 is with preferred refresh rate displaying video.Described video source is video to be played, the refresh rate option of described display device support is determined according to the display capabilities of display device, such as certain display device performance of dispatching from the factory supports the refresh rate of 60Hz, 70Hz, 90Hz, then just comprise 60Hz, 70Hz, 90Hz tri-numerical value in its refresh rate option supported.After the refresh rate option obtaining video source frame per second and display device support, determine preferred refresh rate according to relation therebetween, described preferred refresh rate is one in the refresh rate option of equipment support; Determine that the method for preferred refresh rate is a lot, the multiple of video source frame per second can be adopted to determine preferred refresh rate, such as, when above-mentioned 60Hz, 70Hz, 90Hz tri-refresh rates supported by display device, when video source frame per second is 20Hz, preferred refresh rate can elect 60Hz as; Be that preferred refresh rate can elect 60Hz as when video source frame per second is 30Hz, also can elect 90Hz as.Last with preferred refresh rate displaying video.Described displaying video comprises to be played up video source and to carry out the step play.By above-mentioned steps, video source can be adapted with display device refresh rate when playing, frame per second unmatched problem when there will not be broadcasting, solving picture and playing the factitious problems such as card.
In some specific embodiment, described playing device also carries out step S103 and determines to show multiplying power factor, and described S104 determines that preferred refresh rate and S103 determine that display multiplying power factor method is specially: find display device and support refresh rate option F (F_1, F_2, F_3 ...) in the refresh rate supported of the display device minimum with one of them integral multiple deviation ratio of video source frame per second f as preferred refresh rate, the absolute value of the difference of deviation ratio and equipment refresh rate and a video source frame per second integer multiple and the ratio of this integer multiple multiple of video source frame per second; Described integer is display multiplying power factor k.
Said method can obtain, and display multiplying power factor k can be determined by following formula:
X_((n,m))＝∣F_m-(n*f)∣/(n*f)；n∈N^+；
X_((k,j))＝min┬〖{X_((n,m))}〗；
Then showing multiplying power factor is k, and preferred refresh rate is F_j.
Such as F=60Hz, 70Hz, 90Hz, when video source frame per second is 25Hz, then m can get 1, and 2,3; N can get 2, and 3,4; This is because 2 times of 50Hz of video source frame per second 25Hz are less than the minimum refresh rate 60Hz of equipment just, and 4 times of 100Hz are greater than again that the maximum refresh rate 90Hz of equipment determines just.Therefore, after said method calculates, the minimum situation of deviation ratio is the situation that n gets that 3, m gets 2, then showing multiplying power factor is k=3, and preferred refresh rate is F_2=70Hz.By said method, optimize the selection step of preferred refresh rate, make video playback more smooth and easy and natural.
In other specific embodiments, playing device also carries out step S106 variable playback video, and during described variable playback video, video source every frame picture reproduction time equals display multiplying power factor/preferably refresh rate.In certain embodiments, process video source and the display device refresh rate of different frame per second, and between frame per second when the non-lucky integral multiple of relation, take the way inserting frame or delete frame to make broadcasting frame number per second corresponding with display device refresh rate.Video playback may be caused so uneven, and the card that part spectators can feel once in a while pauses and the discomfort of frame-skipping once in a while, therefore in certain embodiments, takes the mode of variable playback video, when video source frame per second is 25Hz, when preferred refresh rate is 70Hz, and k=3; Carry out frequency conversion broadcasting, the single frames picture of video source plays 3/70 second, and 25 frames play 75/70S altogether, and the picture namely originally playing 1S plays 15/14S now.By above-mentioned design, make video source in the problem adapting to there will not be again while display device refresh rate carries out playing Ka Dun or frame-skipping.Improve the viewing experience of user when watching.
In other further embodiments, playing device also carries out step S105, determines frequency conversion multiplying power factor, and carries out resampling according to frequency conversion multiplying power factor to audio frequency.Described frequency conversion multiplying power factor is the preferred refresh rate of equipment/display multiplying power/video source frame per second; Such as be 25Hz in video source frame per second, when preferred refresh rate is 70Hz, k=3, frequency conversion multiplying power factor is 14/15.The meaning of described frequency conversion multiplying power factor is the ratio of audio frequency broadcasting speed and normal playback speed after frequency conversion.Namely according to the speed of speed change 14/15, resampling is carried out to the audio frequency comprised in video source.In some specific embodiment, described resampling is the resampling mode that speed change does not change tone.The benefit of carrying out audio frequency frequency conversion is that adaptive video frequency conversion is play, make audio frequency can with audio video synchronization, improve further the viewing experience of user.Audio resampling has speed change and the embodiment of modified tone, and we adopt the method for resampling of speed-variation without tone, ensure audio frequency fidelity in speed-change process, therefore also further improve the viewing experience of user.
A kind of video frequency conversion playing device described in certain embodiments of the invention, comprises as lower module: acquisition module 21, processing module 23, playing module 25; Described acquisition module is for obtaining video source frame per second, acquisition module is also for obtaining the refresh rate option that display device is supported, processing module determines preferred refresh rate according to the refresh rate option of display device support and video source frame per second, and playing module is used for preferred refresh rate displaying video.By above-mentioned modular design, video source can be adapted with display device refresh rate when playing, frame per second unmatched problem when there will not be broadcasting, solving picture and playing the factitious problems such as card.
In certain embodiments, described processing module 23 also shows multiplying power factor for determining, described processing module is determined preferred refresh rate and is determined that showing multiplying power factor method is specially: find refresh rate that display device institute supports display device minimum with one of them integral multiple deviation ratio of video source frame per second in refresh rate to support as preferred refresh rate, described integer is show multiplying power factor.Therefore, optimize the selection step of preferred refresh rate, make video playback more smooth and easy and natural.
In certain embodiments, described playing module 25 is also for variable playback video, and during described variable playback video, video source every frame picture reproduction time equals display multiplying power factor/preferably refresh rate.Make video source in the problem adapting to there will not be again while display device refresh rate carries out playing Ka Dun or frame-skipping.Improve the viewing experience of user when watching.
In certain embodiments, processing module 23 is also for determining frequency conversion multiplying power factor, and described frequency conversion multiplying power factor is the preferred refresh rate of equipment/display multiplying power/video source frame per second; Also comprise resampling module 27, described resampling module is used for carrying out resampling according to frequency conversion multiplying power factor to audio frequency.Concrete, described resampling is the resampling mode not changing tone.The benefit of carrying out audio frequency frequency conversion is that adaptive video frequency conversion is play, make audio frequency can with audio video synchronization, improve further the viewing experience of user.Audio resampling has speed change and the embodiment of modified tone, and we adopt the method for resampling of speed-variation without tone, ensure audio frequency fidelity in speed-change process, therefore also further improve the viewing experience of user.It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or terminal equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or terminal equipment.When not more restrictions, the key element limited by statement " comprising ... " or " comprising ... ", and be not precluded within process, method, article or the terminal equipment comprising described key element and also there is other key element.In addition, in this article, " be greater than ", " being less than ", " exceeding " etc. be interpreted as and do not comprise this number; " more than ", " below ", " within " etc. be interpreted as and comprise this number.
Those skilled in the art should understand, the various embodiments described above can be provided as method, device or computer program.These embodiments can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.The hardware that all or part of step in the method that the various embodiments described above relate to can carry out instruction relevant by program has come, described program can be stored in the storage medium that computer equipment can read, for performing all or part of step described in the various embodiments described above method.Described computer equipment, includes but not limited to: personal computer, server, all-purpose computer, special-purpose computer, the network equipment, embedded device, programmable device, intelligent mobile terminal, intelligent home device, wearable intelligent equipment, vehicle intelligent equipment etc.; Described storage medium, includes but not limited to: the storage of RAM, ROM, magnetic disc, tape, CD, flash memory, USB flash disk, portable hard drive, storage card, memory stick, the webserver, network cloud storage etc.
The various embodiments described above describe with reference to the flow chart of method, equipment (system) and computer program according to embodiment and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of computer equipment to produce a machine, making the instruction performed by the processor of computer equipment produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer equipment readable memory that works in a specific way of vectoring computer equipment, the instruction making to be stored in this computer equipment readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded on computer equipment, make to perform sequence of operations step on a computing device to produce computer implemented process, thus the instruction performed on a computing device is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although be described the various embodiments described above; but those skilled in the art are once obtain the basic creative concept of cicada; then can make other change and amendment to these embodiments; so the foregoing is only embodiments of the invention; not thereby scope of patent protection of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included within scope of patent protection of the present invention.
Claims (10)
1. a video frequency conversion player method, is characterized in that, comprises the steps, obtain video source frame per second, obtain the refresh rate option that display device is supported, determine preferred refresh rate, with preferred refresh rate displaying video according to the refresh rate option of display device support and video source frame per second.
2. video frequency conversion player method according to claim 1, it is characterized in that, also comprise step to determine to show multiplying power factor, describedly determine preferred refresh rate and determine that showing multiplying power factor method is specially: find refresh rate that display device institute supports display device minimum with one of them integral multiple deviation ratio of video source frame per second in refresh rate to support as preferred refresh rate, described integer is show multiplying power factor.
3. video frequency conversion player method according to claim 2, is characterized in that, also comprises step variable playback video, and during described variable playback video, video source every frame picture reproduction time equals display multiplying power factor/preferably refresh rate.
4. video frequency conversion player method according to claim 2, is characterized in that, also comprise step, determine frequency conversion multiplying power factor, and described frequency conversion multiplying power factor is the preferred refresh rate of equipment/display multiplying power/video source frame per second; And according to frequency conversion multiplying power factor, resampling is carried out to audio frequency.
5. video frequency conversion player method according to claim 4, is characterized in that, described resampling is the resampling mode not changing tone.
6. a video frequency conversion playing device, is characterized in that, comprises as lower module: acquisition module, processing module, playing module; Described acquisition module is for obtaining video source frame per second, acquisition module is also for obtaining the refresh rate option that display device is supported, processing module determines preferred refresh rate according to the refresh rate option of display device support and video source frame per second, and playing module is used for preferred refresh rate displaying video.
7. video frequency conversion playing device according to claim 6, it is characterized in that, described processing module also shows multiplying power factor for determining, described processing module is determined preferred refresh rate and is determined that showing multiplying power factor method is specially: find refresh rate that display device institute supports display device minimum with one of them integral multiple deviation ratio of video source frame per second in refresh rate to support as preferred refresh rate, described integer is show multiplying power factor.
8. video frequency conversion playing device according to claim 7, is characterized in that, described playing module is also for variable playback video, and during described variable playback video, video source every frame picture reproduction time equals display multiplying power factor/preferably refresh rate.
9. video frequency conversion playing device according to claim 7, is characterized in that, processing module is also for determining frequency conversion multiplying power factor, and described frequency conversion multiplying power factor is the preferred refresh rate of equipment/display multiplying power/video source frame per second; Also comprise resampling module, described resampling module is used for carrying out resampling according to frequency conversion multiplying power factor to audio frequency.
10. video frequency conversion playing device according to claim 9, is characterized in that, described resampling is the resampling mode not changing tone.
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