CN104639846A - Image switching system, image switching device and image switching method - Google Patents
Image switching system, image switching device and image switching method Download PDFInfo
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Abstract
The invention discloses an image switching system. The image switching system comprises at least one display device, a plurality of image sources and a switcher. Each image source provides an image. The switcher is respectively coupled with at least one display device and a plurality of image sources. The switcher comprises a storage module, an image receiving module, a zooming module and an image time sequence control module. The image receiving module receives a first image from a plurality of images. The scaling module performs a first scaling process on the first image to form a first processed image. The image time sequence control module outputs the first processed image to the display device. During the period of switching the first image to the second image, the switcher stores the first processed image output to the display device in the storage module according to the triggering mechanism.
Description
Technical field
The present invention is relevant with image transmission, particularly about a kind of image switched system, image switching device and image changing method.
Background technology
In traditional image switched system, switch couples multiple audio-visual or image source and at least one display unit respectively.When switch carry out multiple audio-visual or image source input the switching of image time, if switch be only by need the audio-visual or image source amplifying process to provide to have compared with the input image zoom of low-res be the image output with higher resolution, or be only that the input image with higher resolution needing to reduce the audio-visual of process or image source and provide is reduced into the image output had compared with low-res, then when display unit shows those image outputs, really can present good display effect that is seamless and that export without noise picture.
But, once second of the higher resolution that has that the switch source that receives switching signal and make to input image is switched to audio-visual or image source that needs reduce by having of needing the audio-visual or image source amplifying process to provide provide compared with the first input image (as shown in Figure 1A) of low-res inputs image (as shown in Figure 1B), in the process that this switches in a flash, image output shown by display unit there will be as the noise picture (dirty frame) shown in Fig. 1 C, puzzlement when causing user to watch, urgently overcomes.
Summary of the invention
Therefore, the present invention proposes a kind of image switched system, image switching device and image changing method, to solve the problems referred to above that prior art suffers from.The present invention during one first image switches to one second image, according to a trigger mechanism by export to this display unit first process after image stored, and in switch during export storage first process after image to output device.Aforementioned during the first image switches to the second image, the time point triggering and produce the switching signal generation switching image can be included widely.In one embodiment, trigger mechanism can for the switching signal in order to this first image to be switched to this second image; In another embodiment, trigger mechanism can be when becoming this second image of reception by this first image of reception, to judge that the second received image is as unstable image is as trigger mechanism.
A specific embodiment according to the present invention is a kind of image switched system.In this embodiment, image switched system comprises at least one display unit, multiple image source and switch.Each image source provides an image.Switch couples with at least one display unit and multiple image source respectively.Switch comprises memory module, image receiver module, Zoom module and image time-sequence control module.Image receiver module receives the first image in multiple image.Zoom module carries out the first convergent-divergent process to form image after the first process to the first image.After image time-sequence control module processes first, image output is to display unit.During the first image switches to the second image, switch will export the rear image store of the first process of display unit in memory module according to trigger mechanism.
In one embodiment, trigger mechanism is a switching signal.Image receiver module receives the second image according to switching signal, and carries out the second convergent-divergent process by Zoom module to the second image.When Zoom module does not complete the second convergent-divergent process, after the first process that memory module stores by image time-sequence control module, image output is to display unit; When Zoom module completes the second convergent-divergent process and forms image after the second process, image time-sequence control module by image output after the second process to display unit.
In one embodiment, trigger mechanism is a switching signal.Image receiver module receives the second image according to switching signal, and carries out the second convergent-divergent process by Zoom module to the second image.Image time-sequence control module in a special time by store first process after image output to display unit at least one times, and in export store first process after image at least one times afterwards by the second image via the second convergent-divergent process formed second process after image output to display unit.
In one embodiment, first convergent-divergent is treated to the process of reducing image analytic degree and the second convergent-divergent is treated to the process of magnified image resolution, or the first convergent-divergent is treated to the process of magnified image resolution and the second convergent-divergent is treated to the process reducing image analytic degree.
In one embodiment, when the process of magnified image resolution, first image or the second image are first stored in memory module, then carry out the process of magnified image resolution through Zoom module, then by image output after image after the first process after process or the second process to display unit.
In one embodiment, when reducing image analytic degree process, first image or the second image are first input to Zoom module to carry out reducing image analytic degree process, and then by image store after image after the first process after process or the second process in memory module, then export display unit to by memory module.
In one embodiment, trigger mechanism for when image receiver module by receive the first image become reception the second image time, if image receiver module judges that the second image that it receives is unstable, image after image time-sequence control module can read the first process that memory module stores also exports display unit to.
In one embodiment, if image receiver module judges its second image stabilization received, the second image output to Zoom module is formed image after the second process to carry out the second convergent-divergent process to the second image.Image after image time-sequence control module can read the second process that memory module stores also exports display unit to.
In one embodiment, if image receiver module judges its second image stabilization received, second image store is in memory module, Zoom module reads the second image of storing of memory module and carries out the second convergent-divergent process to form image after the second process to the second image, and after exporting the second process by image sequencing control mould image to display unit.
In one embodiment, the first convergent-divergent is treated to the process of reducing image analytic degree and the second convergent-divergent is treated to the process of magnified image resolution; Or first convergent-divergent be treated to the process of magnified image resolution and the second convergent-divergent is treated to the process reducing image analytic degree.
In one embodiment, when the process of magnified image resolution, first image or the second image are first stored in memory module, then carry out the process of magnified image resolution through Zoom module, then by image output after image after the first process after process or the second process to display unit.
In one embodiment, when reducing image analytic degree process, first image or the second image are first input to Zoom module to carry out reducing image analytic degree process, and then by image store after image after the first process after process or the second process in memory module, then export display unit to by memory module.
In one embodiment, trigger mechanism for when image receiver module by receive the first image become reception the second image time, if image receiver module judges that the second image that it receives is unstable, image after image time-sequence control module reads the first process by memory module also exports display unit to.
In one embodiment, if image receiver module judges its second image stabilization received, second image output to Zoom module is formed image after the second process by image receiver module to carry out the second convergent-divergent process to the second image, memory module stores the rear image of the second process, and after image time-sequence control module reads the second process, image also exports display unit to.
In one embodiment, if image receiver module judges its second image stabilization received, second image store is in memory module, Zoom module reads the second image of storing of memory module and carries out the second convergent-divergent process to form image after the second process to the second image, and after exporting the second process by image sequencing control mould image to display unit.
In one embodiment, memory module store first process after the image of image shown by display unit.
Compared to prior art, according to image switched system of the present invention, image switching device and image changing method determine by a trigger mechanism (such as the judgement of switching signal or unstable picture) opportunity restoring normal table image, and during the new image that the audio-visual or image source be switched provides not yet reaches normal steady state, the normal table image of restoring is provided to show to display unit, until when determining that the new image that the audio-visual or image source be switched provides has reached normal steady state, reoffer new image to show to display unit, therefore image switched system of the present invention, image switching device and image changing method can effectively avoid traditional display unit in the process switched instantaneously, show the problem of noise picture (dirty frame), with realize seamless and without noise picture export cut effect soon.
Can be further understood by the following detailed description and accompanying drawings about the advantages and spirit of the present invention.
Accompanying drawing explanation
Figure 1A illustrates the first input image had compared with low-res.
Figure 1B illustrates the second input image with higher resolution.
There is the schematic diagram of noise picture in Fig. 1 C image output illustrated shown by display unit of the prior art.
Fig. 2 illustrates the schematic diagram according to the image switched system in one embodiment of the invention.
Fig. 3 illustrates the schematic diagram of the initialize routine between audio-visual or image output device and audio-visual or image source.
Fig. 4 illustrates the inside structure schematic diagram of the switch in image switched system.
It is have the image output of a certain fixing resolution and the input image with higher resolution be reduced into the schematic diagram of the image output with a certain fixing resolution that Fig. 5 and Fig. 6 to illustrate by the operation of switch respectively by having compared with the input image zoom of low-res.
Fig. 7 illustrates the flow chart of the image changing method according to another embodiment of the present invention.
Fig. 8 A to Fig. 8 C illustrates image changing method and operates on schematic diagram in image switched system.
Fig. 9 illustrates the flow chart of another embodiment of image changing method of the present invention.
Figure 10 illustrates another embodiment of the switch in image switched system of the present invention.
[symbol description]
S10 ~ S30: process step
2: image switched system
20: switch
S1 ~ S4: audio-visual or image source
D1 ~ D4: audio-visual or image output device
I0 ~ I3: first interface
I4 ~ I7: the second interface
SW: switching signal
200: image receiver module
201: Zoom module
202: memory module
203: image time-sequence control module
204: image handover module
HPD: hot plug detects
EDID: extending display identification data
HDCP: high-res content protecting
V1: the input image with resolution 800x600
V2, V4, V2 ': the image output with fixing resolution 1280x720
V3: the input image with resolution 1920x1080
NS: unstable picture
Embodiment
A preferred embodiment according to the present invention is a kind of image switched system.In this embodiment, image switched system includes switch, multiple audio-visual or image source and at least one audio-visual or image output device.Please refer to Fig. 2, Fig. 2 illustrates the schematic diagram of the image switched system in the present embodiment.
As shown in Figure 2, image switched system 2 comprises switch 20, audio-visual or image source S1 ~ S4 and audio-visual or image output device D1 ~ D4.It should be noted that, the audio-visual or image source included by image switched system 2 and number that is audio-visual or image output device are not limited with four in this example.In fact, number that is audio-visual or image source can be two or more, and number that is audio-visual or image output device can be one or more.
In practical application, switch 20 can be a kind of audio-visual switch (audiovisual switch) or a kind of keyboard, image and mouse switch (KVM switch).In the present embodiment, switch 20 is a kind of audio-visual switch of array, but not as limit.
As shown in Figure 2, the first side of switch 20 and the second side have multiple first interface I0 ~ I3 and multiple second interface I4 ~ I7 respectively.Wherein, those first interfaces I0 ~ I3 is in order to couple those audio-visual or image source S1 ~ S4; Those second interfaces I4 ~ I7 is in order to couple those audio-visual or image output device D1 ~ D4.
In fact, first interface I0 ~ I3 can be visual graphic array (Video Graphics Array, VGA) interface, digital video interface (Digital Visual Interface, DVI), display port (Display Port) interface or high-resolution multimedia interface (High-Definition Multimedia Interface, the input interface such as HDMI), but not as limit.Audio-visual or image source S1 ~ S4 can be computer or audio and video player (such as DVD player or blue-ray DVD player), but not as limit.Second interface I4 ~ I7 can be the output interfaces such as visual graphic array (VGA) interface, digital video interface (DVI), display port (DisplayPort) interface or high-resolution multimedia interface (HDMI), but not as limit.Audio-visual or image output device D1 ~ D4 can be various different display unit, such as: liquid crystal indicator or electric plasma display device etc., but not as limit.Those audio-visual or image source S1 ~ S4 can provide the input image with at least one first resolution, and those audio-visual or image output device D1 ~ D4 then can support the display of the image output of at least one second resolution.
In this embodiment, the function of switch 20 is to select to switch to different audio-visual or image source S1 ~ S4 according to the actual demand of user and the audio-visual or signal of video signal inputted exports specific one or multiple audio-visual or image output device D1 ~ D4 to.For example, the audio-visual or signal of video signal that single audio-visual or image source S1 inputs to be exported to single audio-visual or image output device D1 by the switching of switch 20 or multiple audio-visual or image output device D2 ~ D3 shows by user.In addition, user also exports the multiple audio-visual or signal of video signal that multiple audio-visual or image source S1 ~ S4 inputs respectively to different display unit respectively by switch 20, such as at one time under audio-visual or signal of video signal that is audio-visual by first or image source S1 export the second audio-visual or image output device D2 to, audio-visual or signal of video signal that is audio-visual by second or image source S2 exports the 3rd audio-visual or image output device D3 to, audio-visual or signal of video signal that is audio-visual by the 3rd or image source S3 exports the first audio-visual or image output device D1 to and audio-visual or signal of video signal that is audio-visual by the 4th or image source S4 exports the 4th audio-visual or image output device D4 to, but not as limit, user can carry out different switching controls arbitrarily according to the actual requirements.
Please refer to Fig. 3, Fig. 3 illustrates the schematic diagram of the initialize routine between audio-visual or image output device and audio-visual or image source.As shown in Figure 3, in an embodiment, when switch any one (for first audio-visual or image output device D1) by those in audio-visual or image output device D1 ~ D4 switches any one (for first audio-visual the or image source S1) be connected in those audio-visual or image source S1 ~ S4, if the first audio-visual or image source S1 is HDMI, between the first audio-visual or image output device D1 and the first audio-visual or image source S1, initiating communications will be set up.
In this embodiment; the process of above-mentioned initiating communications includes transmission hot plug mutually and detects (Hot-Plug-Detect; HPD), extending display identification data (Extended display identification data; and the two-way communication such as high-res content protecting (High Definition Content Protection, HDCP) authorization code EDID).Therefore, carry out in the process of image switching at switch 20, such as, for same the first audio-visual or image output device D1, when switch 20 switches to different audio-visual or image source S1 ~ S4, as long as audio-visual or image source change, all need to carry out initialize routine.Generally speaking, the foundation of initiating communications probably needs the time of 3 ~ 10 seconds.Due in the process set up at initiating communications, picture cannot be passed to the first audio-visual or image output device D1 by the first audio-visual or image source S1, thus causes the first audio-visual or image output device D1 cannot go out the phenomenon of picture in initialization procedure.
In order to avoid above-mentioned situation occurs, in an embodiment, image switched system 2 by control switch 20 convergent-divergent is carried out to the input image with different resolution that is audio-visual from difference or image source S1 ~ S4 and export have fixing resolution image output give those audio-visual or image output device D1 ~ D4, to avoid the problem needing due to switching between audio-visual or image source S1 ~ S4 and audio-visual or image output device D1 ~ D4 to reinitialize, therefore can shorten due to audio-visual or image source S1 ~ S4 carry out switching cause audio-visual or image output device D1 ~ D4 cannot go out the time of picture.It should be noted that, the large I of fixing resolution that the image output of switch 20 adopts is determined according to the actual requirements, there is no certain restriction.
In above-mentioned shortening, audio-visual or image output device D1 ~ D4 cannot go out in the method for the time of picture, must solve be audio-visual or image source S1 ~ S4 switches time, the different analytical-density images how difference is audio-visual or image source S1 ~ S4 provides be scaled to efficiently there is fixing resolution image output to audio-visual or image output device D1 ~ D4.
Please refer to Fig. 4, Fig. 4 illustrates the inside structure schematic diagram of the switch 20 in image switched system 2.In this embodiment, switch 20 at least comprises image receiver module 200, Zoom module 201, memory module 202, image time-sequence control module 203 and image handover module 204.Wherein, image handover module 204 is coupled to audio-visual or image source S1 ~ S4 respectively by first interface I0 ~ I3; Image handover module 204 is coupled to image receiver module 200; Image time-sequence control module 203 is coupled to audio-visual or image output device D1 ~ D4 by the second interface I4; Image receiver module 200 optionally couples Zoom module 201 and memory module 202; Zoom module 201 optionally couples memory module 202 and image time-sequence control module 203; Memory module 202 optionally couples Zoom module 201 and image time-sequence control module 203.Though be noted that Fig. 4 only shows each the second interface I4, for other as the second interface I5 ~ I7 of Fig. 2, there is the framework of Zoom module 201, memory module 202 and image time-sequence control module 203 equally, slightly show at this.That is, image receiver module 200 is coupled with the Zoom module 201 of the not corresponding second interface I4 ~ I7 of Four composition, memory module 202 and image time-sequence control module 203 respectively, below, only switching explanation is carried out with the second interface I4 Zoom module 201 corresponding thereto, memory module 202 and image time-sequence control module 203.
In this embodiment, image handover module 204 is in order to determine that according to a switching signal SW certain or multiple input image that is audio-visual or image source of those audio-visual or image source S1 ~ S4 can be sent to image receiver module 200.Image time-sequence control module 203 is in order to control image output to be sent to the output device D4 coupled with second contact surface I4.
Please refer to Fig. 5 and Fig. 6, it is have the image output of a certain fixing resolution and the input image with higher resolution be reduced into the schematic diagram of the image output with a certain fixing resolution that Fig. 5 and Fig. 6 to illustrate by the operation of switch respectively by having compared with the input image zoom of low-res.Suppose that the default fixing resolution of switch 20 in the present embodiment is 1280x720, it is those audio-visual or equal resolutions that can show of image output device D1 ~ D4.
As shown in Figure 5, suppose the first audio-visual or image source S1 provide the input image V1 that resolution is 800x600, because the resolution 800x600 of input image V1 is less than the default fixing resolution 1280x720 of switch 20, represent switch 20 can first by have compared with the input image V1 of low-res 800x600 amplify (upscale) for there is fixing resolution 1280x720 image output V2 after, then image output V2 is sent to specifically audio-visual or image output device D1.The flow process of above-mentioned amplification procedure is: resolution is that the input image V1 of 800x600 is stored in memory module 202 by image receiver module 200, and then be sent to Zoom module 201 and carry out amplification process, the image output V2 after amplifying process has the resolution of 1280x720.Then, the image output V2 with fixing resolution 1280x720 is sent to image time-sequence control module 203 by Zoom module 201, then the image output V2 with fixing resolution 1280x720 is exported to audio-visual or image output device D1 by image time-sequence control module 203 and play.
As shown in Figure 6, suppose the first audio-visual or image source S1 provide the input image V3 that resolution is 1920x1080, because the resolution 1920x1080 of input image V3 is greater than the default fixing resolution 1280x720 of switch 20, represent switch 20 can first the input image V3 with higher resolution 1920x1080 be reduced (downscale) for there is fixing resolution 1280x720 image output V4 after, then image output V4 is sent to specifically audio-visual or image output device D1.The above-mentioned flow process reducing program is: resolution is that the input image V3 of 1920x1080 is sent to Zoom module 201 and carries out reducing the image output V4 being treated to and having fixing resolution 1280x720 by image receiver module 200, and then is stored in memory module 202.Afterwards, then the image output V4 with fixing resolution 1280x720 exported to audio-visual or image output device D1 by image time-sequence control module 203 and play.
Zoom in or out in handling procedure in above-mentioned Fig. 5 and Fig. 6, the input image V1 with 800x600 resolution stored due to the memory module 202 and image output V4 with 1280x720 resolution is resolution and the relatively little image of data volume, therefore can save the memory space of memory module 202.For example, in the amplification handling procedure that Fig. 5 illustrates, have and be first stored in memory module 202 compared with the input image V1 of low-res 800x600, and then carry out amplification process; Otherwise, what illustrate at Fig. 6 reduces in handling procedure, the input image V3 with higher resolution 1920x1080 first carries out reducing after the image output V4 being processed into and having 1280x720 resolution through Zoom module 201, again the image output V4 had compared with low-res 1280x720 is stored in memory module 202, therefore in the image output V4 that can guarantee, the data that store are all the minimum images of resolution and data volume.
In this embodiment, switch 20 carries out the Zoom module 201 amplifying and reduce needed for process only needs one, it can change according to the demand zooming in or out process the direction receiving data, therefore do not need the Zoom module that other are additionally set, to save the quantity of installation space and Zoom module and memory module, and then reduce costs.For example, in the program of amplifying process, as shown in Figures 4 and 5, the path that signal of video signal transmits is: image receiver module 200=> memory module 202=> Zoom module 201=> image time-sequence control module 203, signal of video signal for amplifying first is stored in memory module 202, and then carries out amplification process by Zoom module 201; In the program reducing process, as shown in Fig. 4 and Fig. 6, the path that signal of video signal transmits is: image receiver module 200=> Zoom module 201=> memory module 202=> image time-sequence control module 203, after signal of video signal for reducing first is reduced by Zoom module 201, then the signal of video signal after reducing is stored in memory module 202.Therefore, although switch 20 only comprises single Zoom module 201, by switching mode image reduced or amplify process.
Next, why the display unit inquired in traditional image switched system be there will be as the noise picture (dirty frame) shown in Fig. 1 C.Please refer to Fig. 4 to Fig. 6, so that the reason occurring above-mentioned noise picture to be described.It should be noted that, although audio-visual or image output device D1 is in the present embodiment with the resolution show image of 1280x720, but do not represent the display capabilities that audio-visual or image output device D1 only has this resolution, user still can be adjusted to required resolution according to the actual requirements.
Suppose be originally audio-visual by first or image source S1 provide the input image V1 with the first resolution 800x600 that need amplify to process to switch 20 after export audio-visual or image output device D1 to and play, when by first, audio-visual or image source S1 switches to the second audio-visual or image source S2 to user, second audio-visual or image source S2 provide the input image V3 with the second resolution 1920 x1080 that need reduce, in this moment switched, because previous time point belongs to image zoom handling procedure, therefore the image stored in memory module 202 is the input image V1 with the first resolution 800x600 that the first audio-visual or image source S1 directly provides, and very first time point after handover, the source receiving signal of video signal due to Zoom module 201 can switch to image receiver module 200 from memory module 202 and reduce process in order to carrying out, and at the same time between, the source that image time-sequence control module 203 obtains signal of video signal also can be switched to from memory module 202 from Zoom module 201, to obtain signal of video signal from memory module 202 to output to audio-visual or image output device D1, the image stored due to memory module 202 is the input image V1 with the first resolution 800x600 that the first audio-visual or image source S1 directly provides, therefore, image time-sequence control module 203 is from acquired by memory module 202 being have the input image V1 of the first resolution 800x600 instead of have the image output V4 of fixing resolution 1280x720, thus causing image time-sequence control module 203 to be sent to image output that is audio-visual or image output device D1 is not the image output V4 with fixing resolution 1280x720, but the input image V1 had compared with low-res 800x600, when causing audio-visual or image output device D1 to play according to the fixing resolution 1280x720 preset, display frame there will be as the noise picture shown in Fig. 1 C.
In order to solve the problem, the present invention further provides a kind of image changing method.As shown in Figure 7, in step S10, the method chooses first image with the first resolution (being 800x600 in this example).In fact, the first image can be selected from the first audio-visual or image source S1 with HDMI, but not as limit.
Then, in step S12, the method carries out the first convergent-divergent process to form image after the first process to the first image, and by audio-visual for image output to the first after the first process or image output device D1.In fact, the first convergent-divergent process can be to have first image zoom of the first resolution 800x600 to the fixing resolution preset (being 1280x720 in this example, is the first audio-visual or supported resolution of image output device D1).As shown in Figure 5, first image of or image source S1 audio-visual from first is through amplifying after the first process being treated to and having resolution 1280x720 after image, and by first, audio-visual or image output device D1 play.
Then, in step S14 and step S16, the method receives a switching signal, using this switching signal as a trigger mechanism, that is to store after the first process image according to switching signal and audio-visual or image source S1 switches to the second audio-visual or image source S2 by first.That is, the image inputing to switch can become the input image V3 that the second audio-visual or image source S2 provides from the input image V1 that originally the first audio-visual or image source S1 provides.In fact, switching signal can by wireless or wired transmission, or user directly presses switch corresponding specific button that is audio-visual or image source produced, and audio-visual or image source S1 switches to the second audio-visual or image source S2 by original first to make switch.In this example, the input image V3 that the second audio-visual or image source S2 provides has the second resolution 1920x1080.
Next, the implementation of step S16 is described in detail.Please refer to shown in Fig. 8 A, in step s 16, when switch 20 receives the switching signal switching audio-visual or image source, switch 20 first just can will be sent to the image output V2 stores synchronized of image time-sequence control module 203 in memory module 202 by Zoom module 201 at present.After switch 20 completes the switching of audio-visual or image source, the first audio-visual or image source S1 that the image source that image receiver module 200 receives can illustrate from script Fig. 8 A becomes the second audio-visual or image source S2 that Fig. 8 B illustrates.
Return Fig. 7, in step S18, the method carries out the second convergent-divergent process to coming from second the second image V3 that is audio-visual or image source S2, to produce the rear image of the second process with fixing resolution.As shown in Figure 8 B, resolution 1920x1080 due to input image V3 is greater than the fixing resolution 1280x720 that switch 20 is preset, therefore can be switched at the input of Zoom module 201 and couple with image receiver module 200 and receive and input image V3, and input image V3 is dwindled into the image output V4 with fixing resolution 1280x720.
As shown in Figure 7, reducing in the middle of the process of process, the method can carry out step S20 ~ S24.In step S20, whether switch can continue to judge to input the action that image V3 dwindles into image output V4 completes.If not, represent image and also not yet complete in reducing, then the method carries out step S24, and the image output V2 stored by step S16 exports the first audio-visual or image output device D1 to, the audio-visual or image output device D1 broadcasting image output V2 for first; If so, represent image to have reduced, then the method carries out step S22, the image output V4 reduced is exported to the first audio-visual or image output device D1, the audio-visual or image output device D1 broadcasting image output V4 for first.Due to before also the process of image V3 convergent-divergent not being completed, first export to output device D1 with the image V2 originally prestored, by this, this method effectively can to overcome in prior art the display unit when the action inputting image V3 and dwindle into image output V4 not yet completes and can play out the problem of noise picture.
Next, above-mentioned steps S20 ~ S24 will be described in detail with Fig. 8 B and Fig. 8 C.As shown in Figure 8 B, before input image V3 is dwindled into the image output V4 with fixing resolution, the image information acquired in memory module 202 of image time-sequence control module 203 be all at Fig. 8 A store the image output V2 ' of the resolution meeting the first audio-visual or image output device D1, and exported to display unit D1.Until, as shown in Figure 8 C, Zoom module 201 by second audio-visual or image source S2 provide the input image V3 with the second resolution 1920x1080 to dwindle into can after the image output V4 of complete broadcasting on the first audio-visual or image output device D1, image time-sequence control module 203 just can obtain the image output V4 of the resolution 1280x720 of or image output device D1 audio-visual corresponding to first.By the image processing mode shown in Fig. 8 A to Fig. 8 C, can effectively solve in prior art because audio-visual or image source switches the problem that institute causes display unit display noise picture.
Please refer to Fig. 9, Fig. 9 illustrates the flow chart of another embodiment of image changing method of the present invention.As shown in Figure 9, substantially, the flow chart of step S10 ~ S18 and the Fig. 7 in this embodiment is similar, both differences is: this embodiment is fixingly at least to export image after the first process after storing once to display unit, and after the second process formed via the second convergent-divergent process by the second image more afterwards, image output is to display unit.Such as: in step S26, coordinate shown in Fig. 8 B, image time-sequence control module 203 first can read image output V2 ' that memory module 202 stores and be sent to the first audio-visual or image output device D1.Then, return Fig. 9, in step S28, switch can judge that image time-sequence control module 203 exports storage image output V2 ' number of times that is audio-visual to first or image output device D1 and whether reached a specific output number of times.If not, representative does not also reach specific output number of times, and repeated execution of steps S26 is till reaching specific output number of times in the method meeting.If so, represent and reached specific output number of times, generally speaking, export after specific times, the second image has also completed the program of the second convergent-divergent process and has formed image after the second process.Now, in step S30, as shown in Fig. 8 C figure, image time-sequence control module 203 can read image output V4 by memory module 202 and be exported to the first audio-visual or image output device D1, and for first, audio-visual or image output device D1 plays.
It should be noted that, although in aforementioned explanation, as shown in Fig. 7 or Fig. 9, the image processing flow process when switching is to switch to the image source that need reduce process from the image source that need amplify process.But be not limited with this situation in practical application.That is, when switch switches different images source, switch 20 all can the image output that exports of the leading prestored presentation time-sequence control module 203 of time point before switching, and switch 20 complete switch after until new image can before normal play, switch 20 all first exports the image output prestored to display unit.Until new image processing completes, switch 20 again by new image output to display unit.By this, so can avoid in prior art switch complete switch after until new image can by normal play before during, the problem of display unit display noise image.What is called can normal play, in one embodiment, for the image newly switched needs to carry out convergent-divergent process, therefore before convergent-divergent process completes, all first exports with the image of pre-stored, until after convergent-divergent process completes, then exports the new image after convergent-divergent process.
Such as, in one embodiment, the first convergent-divergent process in Fig. 7 can be the process reducing image analytic degree, and the second convergent-divergent process can be the process of magnified image resolution.In this embodiment, can learn according to the convergent-divergent processing procedure shown in Fig. 4 and Fig. 5, when the first convergent-divergent be treated to reduce image analytic degree time, Zoom module 201 can directly receive the input image of self imaging receiver module 200, and be stored in memory module 202 after being reduced, then, what memory module 202 stored by image time-sequence control module 203 again reduces rear input image output to display unit D1.Now, when switch 20 receives switching signal SW and switches to the image source that need amplify process, though Zoom module 201 can carry out amplification process from reading image in memory module 202 export to image time-sequence control module 203 again to export display unit D1 to, but amplifying handling procedure still needs a period of time to carry out, therefore, the method utilizes the step S16 of Fig. 7, by when receiving switching signal originally the direct image output that reduces exporting image time-sequence control module 203 to from memory module 202 prestore, then during Zoom module 201 carries out the second convergent-divergent process (magnified image process), the image output that reduces stored first is exported to display unit D1 by image time-sequence control module 203, during Zoom module 201 carries out the second convergent-divergent process (magnified image process), the problem showing noise picture is there is to avoid display unit D1.
Then, please refer to Figure 10, Figure 10 illustrates another embodiment of the switch in image switched system of the present invention.Judge whether whether carrying out image restores except the mode of process, also receive stable image by image receiver module 200, judge whether the action carrying out restoring except aforementioned according to switching signal.Because image receiver module 200 is used for receiving the input image that image handover module 204 sends, therefore, when image handover module 204 receives switching signal SW, such as, when switching to audio-visual or image source S2 from audio-visual or image source S1, the input image that image receiver module 200 receives has unstable picture NS.Therefore, in the present embodiment, image receiver module 200 can by judging whether its received image that inputs has unstable picture NS, as the trigger mechanism that whether existing image output will be restored in memory module 202.
For example, when image handover module 204 does not also receive switching signal SW, image receiver module 200 is all receive the stable input image exported from audio-visual or image source S1, when image handover module 204 receives switching signal SW and audio-visual or image source S1 is switched to audio-visual or image source S2, as long as before image receiver module 200 not yet receives the stable input image from audio-visual or image source S2, image receiver module 200 will judge that the input image received by it all has unstable picture NS and (such as changes because of resolution or caused because of the change of synchronizing signal, but not as limit), now, image receiver module 200 can send a restoring signal to image time-sequence control module 203.Namely image output stable at present can be restored to memory module 202 according to restoring signal by image time-sequence control module 203.In addition, image time-sequence control module 203 can image receiver module 200 not yet complete by before the complete write memory module 202 of stable image that exports from audio-visual or image source S2, image after reading existing the first process restored in memory module 202 constantly also exports to display unit, with the problem avoiding noise picture to export.
When image receiver module 200 judges to receive the stable input image from audio-visual or image source S2, then can successfully input image be write in memory module 202.When memory module 202 is determined with that new input image is complete writes to memory module 202, memory module 202 can notify that image time-sequence control module 203 captures new input image and exports display unit D1 to.It should be noted that, next may have following two kinds of situations:
The first is the situation reducing image processing.Now, Zoom module 201 self imaging receiver module 200 receive the stable input image from audio-visual or image source S2 and carry out reducing be treated to the second process after be stored to memory module 202 after image.Once store successfully, memory module 202 can notify image time-sequence control module 203 read new the second process stored after image directly exporting, seamless and without the image source changeover program of noise to complete.
The second is the situation of magnified image process.In the case, memory module 202 receives the stable input image from audio-visual or image source S2, and once store successfully, memory module 202 can notify that image time-sequence control module 203 reads the new input image stored and also directly exports.Owing to processing for amplifying, therefore, image time-sequence control module 203 can read by Zoom module 201 the new input image stored in memory module 202, and after amplifying via Zoom module 201, display unit D1 is exported to by image time-sequence control module 203, seamless and without the image source changeover program of noise to complete.
Compared to prior art, according to image switched system of the present invention, image switching device and image changing method determine by a trigger mechanism (judgement of such as switching signal or the judgement of unstable picture) opportunity restoring normal table image, and during the new image that the audio-visual or image source be switched provides not yet reaches normal steady state, the normal table image of restoring is provided to show to display unit, until when determining that the new image that the audio-visual or image source be switched provides has reached normal steady state, reoffer new image to show to display unit, therefore image switched system of the present invention, image switching device and image changing method can effectively avoid traditional display unit in the process switched instantaneously, show the problem of noise picture, with realize seamless and without noise picture export cut effect soon.
By the above detailed description of preferred embodiments, it is desirable to clearly to describe feature of the present invention and spirit, and not with above-mentioned disclosed preferred embodiment, category of the present invention is limited.On the contrary, its objective is wish to contain various change and tool equality be arranged in the present invention institute in the category of claim applied for.
Claims (30)
1. an image changing method, comprises the following steps:
Receive one first image;
One first convergent-divergent process is carried out to form the rear image of one first process to this first image, and by image output to display unit after this first process; And
During this first image switches to one second image, according to a trigger mechanism, the rear image of the first process exporting this display unit to is stored.
2. image changing method as claimed in claim 1, it is characterized in that, this trigger mechanism is the switching signal in order to this first image to be switched to this second image, and this image changing method more comprises the following steps:
This second image is received according to this switching signal; And
One second convergent-divergent process is carried out to this second image;
Wherein, when this second image is when carrying out this second convergent-divergent process, by image output after this stored first process to this display unit; When the second image forms image after one second process through this second convergent-divergent process, by image output after this second process to this display unit.
3. image changing method as claimed in claim 1, it is characterized in that, this trigger mechanism is the switching signal in order to this first image to be switched to this second image, and this image changing method more comprises the following steps:
This second image is received according to this switching signal;
After exporting this first process stored, image is at least one times to this display unit;
One second convergent-divergent process is carried out to form the rear image of one second process to this second image; And
In export store this first process after image at least one times after, by this second process after image output give this display unit.
4. as claimed in claim 2 or claim 3 image changing method, is characterized in that, this first convergent-divergent is treated to one and reduces the process of image analytic degree and this second convergent-divergent is treated to the process of a magnified image resolution; Or this first convergent-divergent is treated to the process of a magnified image resolution and this second convergent-divergent is treated to the process that reduces image analytic degree.
5. image changing method as claimed in claim 4, it is characterized in that, when the process of magnified image resolution, this first or second image is first stored in a memory module, and then carry out this magnified image resolution process through a Zoom module, then by image output after the first or second process after process to this display unit.
6. image changing method as claimed in claim 4, it is characterized in that, when reducing image analytic degree process, this first or second image is first input to a Zoom module to carry out this and reduces image analytic degree process, and then by image store after the first or second process after process in a memory module, then export this display unit to by this memory module.
7. image changing method as claimed in claim 1, is characterized in that, when this trigger mechanism is for becoming this second image of reception by this first image of reception, judge that the second image received is unstable image, this image changing method more includes the following step:
When judging this second image instability received, after exporting this first process stored, image is to this display unit.
8. image changing method as claimed in claim 7, it more includes the following step:
When this second image stabilization received, one second convergent-divergent process is carried out to this second image, to form the rear image of one second process;
Store the rear image of this second process; And
After exporting this second process stored, image is to this display unit.
9. image changing method as claimed in claim 7, it is characterized in that, it more includes the following step:
When this second image stabilization received, store this second image; And
Read the second image of storage and one second convergent-divergent process is carried out to form the rear image output of one second process to this display unit to this second image.
10. image changing method as claimed in claim 1, is characterized in that, the image of image shown by this display unit after this first process of storage.
11. 1 kinds of image switching devices, comprising:
One memory module;
One image receiver module, is used to receive one first image in multiple image;
One Zoom module, carries out one first convergent-divergent process to form the rear image of one first process to this first image; And
One image time-sequence control module, in order to by this first process after image output to display unit;
Wherein, during this first image switches to one second image, this image switching device, according to a trigger mechanism, will export the rear image store of the first process of this display unit in this memory module.
12. image switching devices as claimed in claim 11, it is characterized in that, this trigger mechanism is the switching signal in order to this first image to be switched to this second image, this image receiver module receives this second image according to this switching signal, this Zoom module carries out one second convergent-divergent process to this second image, when this Zoom module not yet completes this second convergent-divergent process, after this first process that this memory module stores by this image time-sequence control module, image output is to this display unit; When this Zoom module complete this second convergent-divergent process and formed one second process after image time, this image time-sequence control module by this second process after image output to this display unit.
13. image switching devices as claimed in claim 11, it is characterized in that, this trigger mechanism is the switching signal in order to this first image to be switched to this second image, this image receiver module receives this second image according to this switching signal, this Zoom module carries out one second convergent-divergent process to this second image, after this image time-sequence control module exports this first process of storage at least one times, image is to this display unit, and in export store this first process after image at least one times afterwards by this second image via this second convergent-divergent process formed one second process after image output give this display unit.
14. image switching devices as described in claim 12 or 13, is characterized in that, this first convergent-divergent is treated to one and reduces the process of image analytic degree and this second convergent-divergent is treated to the process of a magnified image resolution; Or this first convergent-divergent is treated to the process of a magnified image resolution and this second convergent-divergent is treated to the process that reduces image analytic degree.
15. image switching devices as claimed in claim 14, it is characterized in that, when the process of magnified image resolution, this first or second image is first stored in this memory module, and then carry out this magnified image resolution process through this Zoom module, then by image output after the first or second process after process to this display unit.
16. image switching devices as claimed in claim 14, it is characterized in that, when reducing image analytic degree process, this first or second image is first input to this Zoom module to carry out this and reduces image analytic degree process, and then by image store after the first or second process after process in this memory module, then export this display unit to by this memory module.
17. image switching devices as claimed in claim 11, it is characterized in that, this trigger mechanism for judge this image receiver module by receive this first image become reception this second image time, the second image received is unstable image, and when this second image judging to receive is unstable, image image time-sequence control module is read the first process stored by this memory module after also exports this display unit to.
18. image switching devices as claimed in claim 17, it is characterized in that, when this image receiver module judges this second image stabilization received, form the rear image of one second process to by this second image output this Zoom module to carry out one second convergent-divergent process to this second image, this memory module stores the rear image of this second process, and after this image time-sequence control module reads out this second process, image also exports to this display unit.
19. image switching devices as claimed in claim 17, it is characterized in that, when this image receiver module judges this second image stabilization received, store this second image in this memory module, this Zoom module read store the second image and to this second image carry out one second convergent-divergent process with formed one second process after image give this image sequencing control mould export to this display unit.
20. image switching devices as claimed in claim 11, is characterized in that, the image of image shown by this display unit after this first process of storage.
21. 1 kinds of image switched systems, comprising:
At least one display unit;
Multiple image source, each image source is in order to provide an image;
One switch, at least one display unit and the plurality of image source couple with this respectively for it, and this switch comprises:
One memory module;
One image receiver module, is used to receive one first image in multiple image;
One Zoom module, carries out one first convergent-divergent process to form the rear image of one first process to this first image; And
One image time-sequence control module, in order to by this first process after image output to display unit;
Wherein, during this first image switches to one second image, this switch, according to a trigger mechanism, will export the rear image store of this first process of this display unit in this memory module.
22. image switched systems as claimed in claim 21, it is characterized in that, this trigger mechanism is the switching signal in order to this first image to be switched to this second image, this image receiver module receives this second image according to this switching signal, this Zoom module carries out one second convergent-divergent process to this second image, when this Zoom module does not complete this second convergent-divergent process, after this first process that this memory module stores by this image time-sequence control module, image output is to this display unit; When this Zoom module complete this second convergent-divergent process and formed one second process after image time, this image time-sequence control module by this second process after image output to this display unit.
23. image switched systems as claimed in claim 21, it is characterized in that, this trigger mechanism is the switching signal in order to this first image to be switched to this second image, this image receiver module receives this second image according to this switching signal, this Zoom module carries out one second convergent-divergent process to this second image, image output after this first process of storage is given this display unit at least one times by this image time-sequence control module in a special time, and in export store this first process after image at least one times afterwards by this second image via this second convergent-divergent process formed one second process after image output give this display unit.
24. image switched systems as described in claim 22 or 23, is characterized in that, this first convergent-divergent is treated to one and reduces the process of image analytic degree and this second convergent-divergent is treated to the process of a magnified image resolution; Or this first convergent-divergent is treated to the process of a magnified image resolution and this second convergent-divergent is treated to the process that reduces image analytic degree.
25. image switched systems as claimed in claim 24, it is characterized in that, when the process of magnified image resolution, this first or second image is first stored in this memory module, and then carry out this magnified image resolution process through this Zoom module, then by image output after the first or second process after process to this display unit.
26. image switched systems as claimed in claim 24, it is characterized in that, when reducing image analytic degree process, this first or second image is first input to this Zoom module to carry out this and reduces image analytic degree process, and then by image store after the first or second process after process in this memory module, then export this display unit to by this memory module.
27. image switched systems as claimed in claim 21, it is characterized in that, this trigger mechanism for judge this image receiver module by receive this first image become reception this second image time, the second image received is unstable image, and when this second image judging to receive is unstable, image image time-sequence control module is read the first process stored by this memory module after also exports this display unit to.
28. image switched systems as claimed in claim 27, it is characterized in that, when this image receiver module judges this second image stabilization received, form the rear image of one second process to by this second image output this Zoom module to carry out one second convergent-divergent process to this second image, this memory module stores the rear image of this second process, and after this image time-sequence control module reads out this second process, image also exports to this display unit.
29. image switched systems as claimed in claim 27, it is characterized in that, when this image receiver module judges this second image stabilization received, store this second image in this memory module, this Zoom module read store the second image and to this second image carry out one second convergent-divergent process with formed one second process after image give this image sequencing control mould export to this display unit.
30. image switched systems as claimed in claim 21, is characterized in that, the image of image shown by this display unit after this first process of storage.
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| TW102149089A TWI527022B (en) | 2013-11-12 | 2013-12-30 | Image switching system, image switching apparatus, and image switching method |
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