CN1063602C - Apparatus for generating plurality of quasi-moving pip/pop screens - Google Patents
Apparatus for generating plurality of quasi-moving pip/pop screens Download PDFInfo
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Abstract
The present invention relates to a device used for producing a plurality of picture-in-picture or picture-outside-picture (PIP/POP) screens and enables to accomplish the rapid tuning for a plurality of frequency channels. According to the present invention, automatic gain control data relative to each frequency channel are stored in a tuning memory according to the initialization of the gain control data. The vision data stored in a cushion video memory are displayed and stored in a host video memory. A sign is used, the writing and the reading operations of the video memory can be controlled through a handshake way. According to the change of the frequency channel, the previous stored automatic gain control data and the tuning frequency are utilized; thereby the quick tuning is accomplished. The device of the present invention can provide the rapid semi-moving PIP/POP screen.
Description
The present invention is relevant with the technology that produces a plurality of picture-in-picture/picture out pictures (PIP/POP) screen, more particularly, relate to a kind of device that is used to produce the PIP/POP screen of quasi-moving, can provide at least three quasi-moving PIP/POP screens by enough two tuners, perhaps in the time of the vision signal of the outside of selecting to utilize time-division system to receive, provide a plurality of screens more than employed tuner number of the PIP/POP form of quasi-moving from the outside.
Usually, be used to provide the PIP/POP display system of at least one secondary screen except that main screen to comprise such system, wherein screen is divided into a plurality of screens from A to L, shown in Figure 1A, or such system, wherein three secondary screens are included in the main screen, shown in Figure 1B, or such system, one of them secondary screen is included in the main screen, shown in Fig. 1 C.
Referring to Fig. 2, illustrate the device of PIP/POP screen that is used for producing quasi-moving of a routine.As shown in Figure 2, this device comprises microcomputer 12, is used for being used for tuning rf frequency vision signal under the control of microcomputer 12 according to a channel search signal changeover control signal SC1 of output and a secondary screen tuner 14 of receiving from remote controller 10.Between secondary screen tuner 14 and microcomputer 12, be connected with secondary screen intermediate frequency detector 16, be used for detecting intermediate-freuqncy signal, and apply an automatic fine tuning signal AFT1 who produces as its testing result to microcomputer 12 from secondary screen tuner 14 outputs.Secondary screen intermediate frequency detector 16 is also exported a secondary screen video signal.This device also comprises a main screen tuner 18, is used for tuning rf frequency vision signal under the control of microcomputer 12, and a main screen intermediate frequency detector 20 is connected between main screen tuner 18 and the microcomputer 12.Main screen intermediate frequency detector 20 detects from the intermediate-freuqncy signal of main screen tuner 18 outputs and applies an automatic fine tuning signal AFT2 as its testing result to microcomputer 12.Main screen intermediate frequency detector 20 is also exported a main screen vision signal.A video converting unit 22 also is provided, it is selected from the secondary screen video signal of secondary screen intermediate frequency detector 16 outputs according to the changeover control signal SC1 of slave microcomputer 12 output, from the vision signal AV1 of the main screen vision signal of main screen intermediate frequency detector 20 outputs and a plurality of outsides of receiving from the outside to AVn.This device also comprises the pulse signal generator 24 and 32 and PIP screen generator 28 of a pair of horizontal/vertical synchronization.When the secondary screen video signal of video converting unit 22 outputs, horizontal/vertical synchronization pulse signal generator 24 applies the horizontal/vertical synchronization pulse signal H/V1 that is used for secondary screen video signal to microcomputer 12.On the other hand, when video converting unit 22 output main screen vision signals, horizontal/vertical synchronization pulse signal generator 32 applies the horizontal/vertical synchronization pulse signal H/V1 that is used for the main screen vision signal to microcomputer 12.According to respectively from the pulse signal H/V1 and the H/V2 of horizontal/vertical synchronization of horizontal/vertical synchronization pulse signal generator 24 and 32 outputs, PIP screen generator 28 suitably reduces from the secondary screen video signal of video converting unit 22 outputs, produces the PIP screen video signal thus.This device also comprises a memory 26, be used to store the PIP screen video signal that produces from PIP screen generator 28, a video data is handled and PIP screen conversion unit 30, be used to change from the PIP screen video signal of PIP screen generator 28 outputs with by main screen vision signal and a two-dimentional display unit 34 that video converting unit 22 is selected and be used for showing the vision signal of selecting by Video processing and PIP screen conversion unit 30.
This device utilizes an AGC (automatic gain control) voltage stably to control the tuner operation of secondary screen tuner 14, and it also can comprise low pass filter 13, as shown in Figure 3.
The operation of the PIP/POP screen generation device of the quasi-moving that the above configuration is arranged is described now.
Marquis when the user selects to want channel with remote controller 10, the channel search signal that sends from remote controller 10 is added to microcomputer 12.According to this channel search signal, microcomputer 12 output changeover control signal SC1, be used for the conversion of control of video converting unit 22, from the main screen vision signal of main screen intermediate frequency detector 20 output or in the signal from the vision signal AV1 of a plurality of outsides to AVn, select a required vision signal.Microcomputer 12 also applies the tuning voltage that the automatic fine tuning signal AFT2 that a basis receives from main screen intermediate frequency detector 20 and the horizontal/vertical synchronization pulse signal H/V2 that receives from horizontal/vertical synchronization pulse signal generator 32 compensate exactly to main screen tuner 18.Vision signal-main screen the vision signal selected by video converting unit 22 or outside vision signal AV1 are displayed on the main screen shown in Figure 1B by two-dimentional display unit 34 to one of AVn.
When the operation of another channel search signal by the user is applied to microcomputer 12, picture in succession continuously is presented at the motion picture form during the main screen simultaneously, another other changeover control signal of microcomputer 12 output SC1 are used to select the secondary screen video signal from secondary screen intermediate frequency detector 16 outputs.Microcomputer 12 also increases tuning voltage at leisure, and till secondary screen tuner 14 received one first rf frequency vision signal, the tuning voltage that is applied to secondary screen tuner 14 was to be compensated with the identical mode that is used for main screen tuner 18.
Then, the first rf frequency vision signal is reduced to a suitable size by PIP screen generator 28, makes it can be shown on secondary screen.The first rf frequency vision signal that reduces is stored in memory 26 then.After this, memory 26 is delivered to two-dimentional display unit 34 by video data processing and PIP screen conversion unit 30 with stored video signal.Therefore, two-dimentional display unit 34 shows the vision signal of the channel A shown in Figure 1B on secondary screen.
Thereby channel search is to carry out according to the order of channel A-channel B-channel C-channel A, till all preset frequency sections are searched fully.
In the PIP displaying scheme shown in Fig. 1 C, the picture of the motion picture of main screen and the quasi-moving of secondary screen is side by side received with two tuners and demonstration.
In this case, microcomputer 12 is supplied with main screen tuner 18 main screen tuning voltage, and conversely, main screen tuner 18 produces intermediate-freuqncy signal.This intermediate-freuqncy signal is converted to a compound vision signal with main screen base band by main screen intermediate frequency detector 20 and also delivers to video converting unit 22 subsequently then.According to the changeover control signal SC1 of slave microcomputer 12 output, video converting unit 22 selects to be converted in the AVn one of the compound vision signal of main screen base band or outside vision signal AV1.The vision signal of selecting by video converting unit 22 handle through video data and PIP screen conversion unit 30 after, be presented on the main screen shown in Fig. 1 C by two-dimentional display unit 34.
Compound vision signal with secondary screen base band is also produced by the tuning voltage that secondary screen tuner 14 and secondary screen intermediate frequency detector 16 are exported according to slave microcomputer 12.In this case, the vision signal AV1 of the compound vision signal of the secondary screen baseband of video converting unit 22 selections or outside is to AVn.The vision signal of selecting is presented on the secondary screen shown in Fig. 1 C by two-dimentional display unit 34 after by video data processing and PIP screen conversion unit 30.
As mentioned above, can use an AGC (automatic gain control) voltage stably to control the tuner operation of secondary screen tuner 14, as shown in Figure 3.In this case, secondary screen intermediate frequency detector 16 produces an AGC (automatic gain control) voltage AGC, is applied to secondary screen tuner 14 after by low pass filter 13.In Fig. 4, be used to different channel A, B, the AGC (automatic gain control) voltage of the tuning vision signal of C is represented as " VA " respectively, " VB " and " VC ".In Fig. 4, rely on the change in gain of field intensity also to be demonstrated.In the curve C shown in Fig. 41, C2 and C3 have indicated the change in gain at secondary screen tuner 14 respectively, in the change in gain and the variation in total gain of secondary screen intermediate frequency detector 16.
But general PIP display unit can not can side by side provide the screen of at least three quasi-movings with two tuners.Though problem like this can solve by increasing other tuner, this can cause the increase in the expense of manufacture view.When using the AGC (automatic gain control) voltage situation, can produce the problem of screen flicker.Because the low pass filter that uses in this case comprises the resistor and the capacitor of the time constant that needs are big, from the signal waveform W1 of the AGC (automatic gain control) voltage of low pass filter output relate to one fall time ft and rise time rt.For example, when low pass filter comprised the capacitor of 10K resistor and 50PF, fall time, ft and rise time rt were respectively 0.5 second, because time constant is 0.5 second.Therefore, when changing channel, need at least 0.5 second time to remove to stablize secondary screen video signal.The phenomenon of screen flicker appears in the result.In this case, it is impossible providing three within one second.Therefore, each the PIP/POP screen that utilizes AGC (automatic gain control) voltage to produce is different from static screen, because its generation is very slowly.
Therefore, the purpose of this invention is to provide a kind of device that is used to produce the PIP/POP screen of quasi-moving, can be as long as the PIP/POP screen of at least three quasi-movings be provided or utilize time-sharing system when the vision signal of the outside of selecting to receive the time from the outside with two tuners, the number of PIP/POP form that quasi-moving is provided is more than a plurality of screens of the number of the tuner of use.
According to the present invention, this purpose is to finish by the device that the PIP/POP screen that is used for producing a plurality of quasi-movings is provided, and this device comprises: a tuning memory, be used for the memory tuning data, and be used for tuning each channel radiofrequency vision signal; A microcomputer is used for controlling the tuner operation of each rf frequency vision signal according to each the relevant channel search signal that receives by remote controller; A main screen tuned cell is used for the rf frequency vision signal of the tuning channel relevant with main screen under the control of microcomputer, export the main screen vision signal thus; A secondary screen tuned cell for the rf frequency vision signal of tuning relevant with secondary screen respectively a plurality of channels sequentially, is exported secondary screen video signal thus; Conversion of video and horizontal/vertical synchronization pulse signal generation unit are used for selecting from any one of the vision signal of the vision signal of secondary screen and the output of main screen tuned cell or an outside input and the horizontal/vertical synchronization pulse signal that detection is used for main screen and secondary screen video signal; The PIP/POP screen generation unit of a quasi-moving, the vision signal that is used for control of video conversion and horizontal/vertical synchronization pulse signal generation unit is selected, the vision signal of the selection that reduces, the PIP/POP vision signal and of a quasi-moving of output is blanking signal fast; A video storage unit is used to store the vision signal that reduces from the PIP/POP screen generation unit output of quasi-moving, and this video storage unit comprises buffered video memory and a main video memory; And video data handles and display unit, is used to show from the quasi-moving PIP/POP vision signal of the PIP/POP screen generation unit output of quasi-moving and the main screen vision signal exported from video conversion and horizontal/vertical synchronization pulse signal generation unit.
Other purpose and aspect of the present invention will be more distinct from the description of the following embodiment that follows accompanying drawing, wherein:
Figure 1A is a schematic diagram to 1C, shows conventional PIP screen respectively, wherein
Figure 1A shows the situation that screen wherein is separated a plurality of screens,
Figure 1B show situation that three secondary screens are provided on the main screen and
Fig. 1 C shows the situation that main screen has a secondary screen,
Fig. 2 is the device block diagram that conventional being used for produces the PIP/POP screen of quasi-moving,
Fig. 3 is to use the block diagram of the AGC (automatic gain control) voltage data processing unit of the routine that disposes in the device among Fig. 2 of AGC (automatic gain control) voltage,
Fig. 4 is performance diagram, shown that the AGC (automatic gain control) voltage by Fig. 3 is the gain amplifier of each channel acquisition,
Fig. 5 A and 5B are schematic diagram, have shown the PIP/POP screen according to quasi-moving of the present invention respectively, wherein
Fig. 5 A has shown the PIP/POP screen of the quasi-moving when a vertical sync pulse signal that is used for main screen is used; With
Fig. 5 B has shown the PIP/POP screen of the quasi-moving when a horizontal synchronization pulse signal that is used for main screen is used;
Fig. 6 is a block diagram, illustrates the device that is used for producing the PIP/POP screen of a plurality of quasi-movings according to of the present invention;
Fig. 7 is a block diagram, illustrates the secondary screen tuned cell in the device that is included among Fig. 6;
Fig. 8 is a block diagram, illustrates the PIP/POP screen generation unit in the device that is included among Fig. 6;
Fig. 9 is a flow chart, has shown the write operation of the video memory unit execution of the device that is included among Fig. 6;
Figure 10 is a flow chart, has shown the operation of the tuning accelerator execution of the device that is included among Fig. 7;
Figure 11 is a flow chart, has shown the read operation that the video memory unit of the device that is included among Fig. 6 is carried out and the operation of Video processing and display unit;
Figure 12 is oscillogram, shown respectively from the AGC (automatic gain control) voltage of the device output of the device of Fig. 3 and Fig. 7.
Fig. 6 has shown the device that is used for producing the PIP/POP screen of a plurality of quasi-movings according to of the present invention.
As shown in Figure 6, the inventive system comprises control unit 70, the tuning data of each broadcasting channel of storage before utilizing, be used for controlling the tuner operation that is used to main screen and at least one secondary screen to receive each radiofrequency vision signal, secondary screen tuned cell 71 is under the control of control unit 70, be used for the tuning rf frequency vision signal that is used for secondary screen, with main screen tuned cell 72, under the control of control unit 70, be used to main screen tuned radio frequency frequency vision signal.Video conversion and horizontal/vertical synchronization pulse signal generation unit 73 are used under the control of control unit 70, select one of the vision signal exported from secondary screen tuned cell 71 and main screen tuned cell 72 or vision signal AV.Video conversion and horizontal/vertical synchronization pulse signal generation unit 73 are also exported the horizontal/vertical synchronization pulse signal H/Vpls2 that is used for the horizontal/vertical synchronization pulse signal H/Vpls1 of main screen and is used for secondary screen.This device further comprises PIP/POP screen generation unit 74, be used to receive vision signal and horizontal/vertical synchronization pulse signal H/Vpls1 and H/Vpls2 from video conversion and 73 outputs of horizontal/vertical synchronization pulse signal generation unit, the digital of digital video data that storage reduces, with output quasi-moving PIP/POP vision signal VS and blanking signal FB fast, and video data is handled and display unit 75, be used for selecting from the PIP/POP vision signal VS of the quasi-moving of PIP/POP screen generation unit 74 outputs or from the vision signal that video conversion and horizontal/vertical synchronization pulse signal generation unit 73 are exported any one, and, show the vision signal of selecting afterwards for after its demonstration does suitable processing.
As shown in Figure 7, secondary screen tuned cell 71 comprises secondary screen tuner 703, under the control of microcomputer 702, be used for the tuning secondary screen rf frequency vision signal that receives secondary screen tuned cell 71, secondary screen intermediate frequency detector 704, be used for detecting intermediate-freuqncy signal from secondary screen tuner 703 outputs, export secondary screen video signal thus, and tuning accelerator 705, be used for increasing or reduce AGC (automatic gain control) voltage AGC1 that receives by low pass filter 33 from secondary screen intermediate frequency detector 704 and the AGC (automatic gain control) voltage that applies this increase or minimizing to secondary screen tuner 703.
Tuning accelerator 705 comprises comparator 34, be used for relatively passing through AGC (automatic gain control) voltage and the feedback AGC (automatic gain control) voltage that low pass filter 33 receives, controller 35, being used for conversion feedback AGC (automatic gain control) voltage is the digital Auto Gain control data, increase or reduce the automatic gain control data according to output signal from comparator 34 outputs, and control tuning memory 701 and store the automatic gain control data that wherein increases or reduce, with a digital/analog converter 36, the automatic gain control data that is used for changing slave controller 35 outputs is a simulation AGC (automatic gain control) voltage.
On the other hand, main screen tuned cell 72 comprises main screen tuner 706, under the control of microcomputer 702, be used for the tuning main screen rf frequency vision signal that receives main screen tuned cell 72, main screen intermediate frequency detector 707, be used for detecting intermediate-freuqncy signal, export the main screen vision signal thus from 706 outputs of main screen tuner.
Video conversion and horizontal/vertical synchronization pulse signal generation unit 73 comprise video converting unit 708, be used under the control of PIP/POP screen generation unit 74 selecting from the vision signal of the vision signal of secondary screen tuned cell 71 and 72 outputs of main screen tuned cell or outside input one of any, a horizontal/vertical synchronization pulse signal generator 709, the video signal generating of selecting according to video converting unit 708 are used for the horizontal/vertical synchronization pulse signal H/Vpls1 of main screen and are used for the horizontal/vertical synchronization pulse signal H/Vpls2 of secondary screen.
PIP/POP screen generation unit 74 comprises the PIP/POP screen generation unit 710 of a quasi-moving, be used to reduce any one of vision signal of the secondary screen video signal that receives by video converting unit 708 or outside input, and the PIP/POP vision signal VS of output quasi-moving and blanking signal FB and a tuning control signal TC fast.This PIP/POP screen generation unit 74 also comprises video memory unit 711, is used for the secondary screen video signal that storage reduces under the control of the PIP/POP of quasi-moving screen generation unit 710.Video memory unit 711 comprises that buffered video memory 808 and has the channel of being used for A, the main video memory 809 of the memory location of B and C.
As shown in Figure 8, the PIP/POP screen generation unit 710 of quasi-moving comprises that the multi-screen of a quasi-moving produces controller 806, be used for receiving be used for main screen 1 and be used for the horizontal/vertical synchronization arteries and veins signal H/Vpls2 of secondary screen, export tuning control signal Tc thus, simultaneously control of video converting unit 708.The PIP/POP screen generation unit 710 of quasi-moving further comprises writes processor 807, be used for producing under the control of controller 806 at the multi-screen of quasi-moving, reduce the secondary screen video signal that receives by video converting unit 708 in vertical and horizontal direction, and the digital of digital video data that record reduces in video memory unit 711, input selector 810, be used for producing under the control of controller 806 at the multi-screen of quasi-moving, the video data of selection 711 outputs from the video memory unit, video recovery processor 811, be used for producing under the control of controller 806 at the multi-screen of quasi-moving, from the video data of input selector 810 output, recover secondary screen video signal, export the PIP/POP vision signal VS of quasi-moving and blanking signal FB fast thus.
Video data is handled and display unit 75 comprises video conversion and data processing unit 712, be used to select the main screen vision signal that receives by video converting unit 708 or from the PIP/POP vision signal VS of the quasi-moving of video recovery processor 811 outputs, and in order to show, the vision signal of selecting is done suitable processing, and two-dimentional display unit 713, be used to receive blanking signal FB fast and show the vision signal of exporting from video conversion and data processing unit 712.
Narration is according to the operation with this device of above-mentioned configuration of the present invention now.
When the channel search signal by when remote controller 700 is added to microcomputer 702, main screen tuner 706 is selected the required rf frequency vision signal relevant with the target broadcasting channel from the input radio frequency vision signal under the control of microcomputer 702, for example, channel D.It is intermediate-freuqncy signal that main screen tuner 706 is changed the rf frequency vision signal of selecting then.Main screen intermediate frequency detector 707 detects the intermediate-freuqncy signal that is added to this place, exports main screen vision signal and an AGC (automatic gain control) voltage AGC2 thus.The main screen vision signal is applied to video converting unit 708 and AGC (automatic gain control) voltage AGC2 is applied to main screen tuner 706.The main screen vision signal is presented on the main screen, by two-dimentional display unit 713 after passing through conversion of video converting unit 708 and video and data processing unit 712 processing as shown in Figure 5.
Under the such as mentioned above condition that is being presented on the main screen of the motion video of channel D, when with the channel that is different from channel D for example, channel A, when the vision signal of the quasi-moving that B is relevant with C is produced, they are displayed on the PIP/POP screen relevant with those channels, now it are described in detail.
Tuning memory 701 is stored each broadcasting channel in advance, for example, channel ACH, BCH, CCH, and with these channels ACH, BCH, tuned frequency TUNE-A, TUNE-B and TUNE-C that CCH is relevant.When the user is provided with the PIP/POP mode with remote controller 700, automatic gain control data AGC-A, AGC-B and AGC-C are produced by tuning accelerator 705 and are stored in tuning memory 701 then.For the automatic gain control data, therefore, initialization is carried out (step 10).
This initialization procedure will be described in detail in conjunction with Fig. 7 and Figure 10.In case its automatic gain control (step S1) of microcomputer 702 beginnings, it determines whether that present mode of operation is corresponding to accelerated mode (step S2).Because operation is carried out with initialization mode, microcomputer 702 applies a tuned frequency that interrelates with target channel that is stored in advance in the tuning memory 701 to secondary screen tuner 703.According to this tuned frequency, secondary screen intermediate frequency detector 704 applies a corresponding secondary screen video signal to video converting unit 708 then and produces an AGC (automatic gain control) voltage AGCl simultaneously.After this, the comparator 34 of tuning accelerator 705 is relatively by the AGC (automatic gain control) voltage AGCl of low pass filter 33 receptions and the AGC (automatic gain control) voltage of feeding back from digital/analog converter 36 (step S13).Controller 35 is changed the feedback AGC (automatic gain control) voltage then to be the digital Auto Gain control data and to change the automatic gain control data according to relatively result.That is, when the output of comparator 35 have one on the occasion of the time, controller 35 increases automatic control datas (step S14).When the output of comparator 35 was a negative value, controller 35 reduced automatic control data (step S15).During the automatic gain control data that increases or reduce is recorded in tuning memory 701 (step 516), be sent to digital/analog converter 36.The automatic gain control data that digital/analog converter 36 conversions receive is a simulation AGC (automatic gain control) voltage (step 517).This simulation AGC (automatic gain control) voltage is applied to secondary screen tuner 703, comparator 34 and controller 35.The above process is repeated to carry out under the control of microcomputer 702, up to the automatic gain control data AGC-A that is used for whole channels, till AGC-B and AGC-C are initialised.
In case initialization procedure is done, secondary screen tuner 703 utilizes the AGC-A pair of radiofrequency vision signal relevant with channel A of tuned frequency TUNE-A and automatic gain control data that is stored in tuning memory 701 to carry out tuner operation (step 20), as shown in Figure 9.This tuner operation is illustrated in Figure 10.That is, in case microcomputer 702 begins its automatic gain control at step S1, the automatic gain control data AGC-A that the controller 35 of tuning accelerator 705 is read to be stored in the tuning memory 701 delivers to digital/analog converter 36 (step S3) then.The automatic gain control data AGC-A that digital/analog converter 36 conversions receive is a simulation AGC (automatic gain control) voltage (step S4).The AGC (automatic gain control) voltage of conversion is applied to secondary screen tuner 703 then.According to AGC (automatic gain control) voltage, secondary screen tuner 703 is selected the high-frequency video signal of channel A.
Under the control of the quasi-moving multi-screen controller 806 in being included in the PIP/POP screen generation unit 710 of quasi-moving, select by video converting unit 708 from the secondary screen video signal of secondary screen intermediate frequency detector 704 outputs, make it to be applied to and write processor 807.After this, write the vision signal that processor 807 reduces to import, shown in the flow chart of Fig. 9.One of the digital of digital video data that reduces or a frame produce the buffered video memory 808 (step S30) that is stored in video storage unit 711 under controller 806 controls at the multi-screen of quasi-moving.In this case, sign with the operation of the write and read of handshake method control of video memory cell 711, be set to " 1 ", because when the vertical sync pulse signal Vpls1 that is used for main screen divides respectively constantly channel, in the time interval of channel A, it has a high level, shown in the Far Left part of Figure 11.
Therefore, the multi-screen of quasi-moving produces controller 806 and determines whether that sign is set to " 1 " (step S101), as shown in figure 11.Because sign is set to " l ", determines whether that then the video data relevant with channel A has been stored in buffered video memory 808 (step S102).In this case, therefore, channel A video data is sent to main video memory 809 then from 808 outputs of buffering video memory.The video data that transmits is stored in the channel A memory location of main video memory 809 then.As a result, the data in memory location are refreshed.In this case, input selector 810 is selected from the video data of buffering video memory 808 outputs under the control of the multi-screen generation controller 806 of quasi-moving.After by video recovery processor 811 and video data processing and display unit 75, the video data of selection is displayed on the channel A screen (step 103) then.If sign step S101 determine be not be set to " 1 " if or determine that at step S102 buffered video memory 808 is not stored the video data relevant with channel A, be stored in the video data of main video memory 809 before then, input selector 810 is selected.The video data of selecting is displayed on the channel A screen (step S105) after handling through the method same with step S103 then.
After this, sign is reset to " 0 " (step S104).The multi-screen of quasi-moving produces controller 806 and applies tuner control signal Tc then to microcomputer 702, so that with the tuning rf frequency vision signal relevant with channel B of aforesaid mode.In order to select the vision signal relevant with channel B, the multi-screen of quasi-moving produces controller 806 control of video converting units 708 (step S40).One high level is arranged owing to be applied to main screen vertical sync pulse signal Vpls1 that the multi-screen of quasi-moving produces controller 806 being used for the channel B time interval, sign is to be set to " 1 " (step S50), as shown in Figure 9.This means that new video data has been stored in the buffered video memory 808.Therefore, the multi-screen of quasi-moving produces controller 806 and carries out one and be used to begin the new control of writing with display operation.
Therefore, the multi-screen of quasi-moving produces controller 806 and determines whether that sign is set to " 1 " (step 60 in Fig. 9 and the step S201 in Figure 11).Because sign is set to " 1 ", determines whether that then the video data relevant with channel B has been stored in buffered video memory 808 (step S202).Because channel B video data has been stored in buffered video memory 808, it is sent to main video memory 809 then so that it can be stored in channel B memory location.Through handling (step 203) afterwards with the same method of step S103, this video data is displayed on the channel B screen.If sign determines it is not to be set to " 1 " or to determine that at step S202 buffered video memory 808 does not have the storage video data relevant with channel B at step S201, be stored in the video data of video memory 809 before then input selector 810 is selected.The video data of selecting is displayed on the channel B screen (step S205) after the same method of process and step step 203 is handled.
Thereafter, sign resets to " 0 " (step S204).The radiofrequency vision signal relevant with channel C is then by tuning.Therefore, the step S50 alike with above-mentioned steps, S60, S301, S302, S303, S304 and S305 are sequentially carried out.Thereby, when the radiofrequency vision signal quilt of these channels is sequentially tuning, being used for channel A, the screen of B and C becomes the PIP/POP screen of quasi-moving respectively.
On the other hand, when video converting unit 708 Be Controlled were selected outside incoming video signal AV, this outside vision signal can show with the PIP/POP form of quasi-moving.When using the horizontal synchronization pulse signal Hpls1 relevant with main screen, the PIP/POP screen of quasi-moving is flatly arranged, shown in Fig. 6 B.
Can understand from the above,,, utilize tuning accelerator according to initialization because the automatic gain control data relevant with each channel is stored in tuning memory according to the present invention, can be tuning fast to the rf frequency vision signal.In other words, the channel that is used for secondary screen can be by tuning apace, because AGC (automatic gain control) voltage has signal waveform near desirable AGC (automatic gain control) voltage waveform W2 used according to the present invention, as shown in figure 12.
Therefore, the phenomenon that does not have screen flicker according to channel change.It also can produce the PIP/POP screen of stable quasi-moving.According to the present invention, it also can produce the screen of the PIP/POP form of a plurality of quasi-movings fast of Duoing than used tuner number.Therefore, the vision signal of each channel and outside incoming video signal can show on a plurality of PIP/POP screens with the state of quasi-moving.
Though preferred embodiment of the present invention, it will be understood by those of skill in the art that various improvement for illustrative purpose is disclosed and substitutes is possible, without departing from the scope and spirit of the present invention.
Claims (4)
1. device that is used for producing picture-in-picture/picture out picture (PIP/POP) screen of a plurality of quasi-movings comprises:
A tuning memory is used for storing the tuning data of the radiofrequency vision signal that is used for tuning each channel;
A microcomputer is used for tuner operation according to each relevant each radiofrequency vision signal of channel search signal controlling that receives by remote controller;
A main screen tuned cell, under Controlled by Microcomputer, the tuning rf frequency vision signal relevant with main screen exported the main screen vision signal thus;
A secondary screen tuned cell is used for the rf frequency vision signal of sequentially tuning relevant with secondary screen respectively a plurality of channels, and then exports secondary screen video signal;
A video is changed and horizontal/vertical synchronization pulse signal generation unit, is used for selecting vision signal or outside incoming video signal from secondary screen and the output of main screen tuned cell also to be signal main screen and the secondary screen video signal detection level/vertical synchronization arteries and veins;
The PIP/POP screen generation unit of a quasi-moving, the vision signal that is used for the pulse signal generation unit of control of video conversion and horizontal/vertical synchronization is selected, the vision signal of reduce selecting, and the PIP/POP vision signal and of exporting quasi-moving blanking signal fast;
A video memory unit is used for storing from the vision signal of the minimizing of the PIP/POP screen generation unit output of quasi-moving, and this video storage unit comprises a buffered video memory and a main video memory;
Video data is handled and display unit, is used for showing from the PIP/POP vision signal of the quasi-moving of the PIP/POP screen generation unit output of quasi-moving and the main screen vision signal exported from video conversion and horizontal/vertical synchronization pulse signal generation unit.
2. according to the device of claim 1, wherein secondary screen tuned cell comprises:
A secondary screen tuner under the control of microcomputer, is used to receive the tuning data of a class as the tuned frequency relevant with each channel and according to the high-frequency video signal of tuning this channel of tuning data that receives;
A secondary screen intermediate frequency detector is used for detecting the intermediate-freuqncy signal from secondary screen tuner output, thus, exports a secondary screen video signal and an AGC (automatic gain control) voltage; With
A tuning accelerator is used for storing the automatic gain control data, increase or reduce according to the AGC (automatic gain control) voltage that receives by low pass filter and feedback AGC (automatic gain control) voltage, as tuning data according to the tuning memory of its initialization.
3. according to the device of claim 2, wherein tuning accelerator comprises;
A comparator is used for relatively the AGC (automatic gain control) voltage and the feedback AGC (automatic gain control) voltage that receive by low pass filter;
A controller, being used for according to initialization conversion feedback AGC (automatic gain control) voltage is the digital Auto Gain control data, increase or reduce the automatic gain control data according to output signal from comparator, in tuning memory, store the automatic gain control data that increases or reduce, and before initialization is done back output, be stored in the automatic gain control data in the tuning memory;
A digital/analog converter is used for changing the automatic gain control data of slave controller output for simulating AGC (automatic gain control) voltage and the AGC (automatic gain control) voltage of changing being added to whole secondary screen tuners, comparator and controller.
4. according to the device of claim 1, wherein the PIP/POP screen generation unit of quasi-moving comprises:
The multi-screen of a quasi-moving produces controller, and be used for according to the main screen horizontal/vertical synchronization pulse signal utilization sign setting that receives or reset, the write and read operation of control of video memory cell, and output is used for channel and changes tuning control signal;
Write processor for one, be used for producing under the control of controller, reduce secondary screen video signal at the multi-screen of quasi-moving;
An input selector is used for producing under the control of controller at the multi-screen of quasi-moving, selects from the video data of buffering video memory or the output of main video memory;
A video recovery processor is used for producing under the control of controller at the multi-screen of quasi-moving, recovers from the video data of input selector output, as secondary screen video signal, exports the PIP/POP vision signal of quasi-moving and blanking signal fast thus.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR19950000636 | 1995-01-16 | ||
| KR636/95 | 1995-01-16 | ||
| JP4602295 | 1995-12-01 | ||
| JP46022/1995 | 1995-12-01 | ||
| JP46022/95 | 1995-12-01 | ||
| KR636/1995 | 1995-12-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1135141A CN1135141A (en) | 1996-11-06 |
| CN1063602C true CN1063602C (en) | 2001-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96100865A Expired - Fee Related CN1063602C (en) | 1995-01-16 | 1996-01-15 | Apparatus for generating plurality of quasi-moving pip/pop screens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1063602C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054720C (en) * | 1997-06-26 | 2000-07-19 | 中国厦门华侨电子企业有限公司 | Picture menu programme selecting method and device for TV receiver |
| CN1826572A (en) * | 2003-06-02 | 2006-08-30 | 迪斯尼实业公司 | System and method of programmatic window control for consumer video players |
| KR101067774B1 (en) * | 2004-09-03 | 2011-09-28 | 엘지전자 주식회사 | Broadcasting receiver and method for controlling tuner thereof |
| CN101547327B (en) * | 2008-03-24 | 2013-06-26 | 深圳Tcl新技术有限公司 | Window television |
| CN102307285B (en) * | 2011-03-18 | 2017-03-01 | 海尔集团公司 | A kind of processing method of multi-frame television program and system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2152395Y (en) * | 1993-04-30 | 1994-01-12 | 李益安 | Suction type fan flytrap |
| CN2175502Y (en) * | 1993-08-07 | 1994-08-24 | 季晓勇 | Control device for multi TV picture in same screen displaying |
-
1996
- 1996-01-15 CN CN96100865A patent/CN1063602C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2152395Y (en) * | 1993-04-30 | 1994-01-12 | 李益安 | Suction type fan flytrap |
| CN2175502Y (en) * | 1993-08-07 | 1994-08-24 | 季晓勇 | Control device for multi TV picture in same screen displaying |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1135141A (en) | 1996-11-06 |
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