CN1189045A - Double-image display device and method - Google Patents
Double-image display device and method Download PDFInfo
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Abstract
A dual-picture display device for displaying two different groups of video signals (NTSC) on left and right panes of a screen at same time is composed of two tuners for receiving and generating two different groups of video signals, two digital circuits for digitalizing the video signals, controller for combining the outputs of two digital circuits, a D/A converter for converting the composite digital signals into combined video signals, and display controller for displaying the combined video signals. Different methods are used to solve the asynchronous problem of two video signals.
Description
The present invention relates to a kind of video display devices and method, be meant a kind of double-image display device and method that two vision signals is shown in simultaneously the screen left and right sides especially.
Wide screen (16: 9) TV more and more is subjected to popular liking on market, but general panavision only to show by a video pictures that vision signal was constituted, is especially showing one by NTSC (NTSC) 4: 3 video pictures that vision signal constituted mostly.If this picture without special processing, then can produce two black regions in the left and right sides of screen, this picture seems not very comfortable and can't show the characteristic of wide screen.If can increase the left and right sides that a little circuit is simultaneously displayed on two ntsc video signals wide screen, then see the TV programme that the people of TV just can watch two different channels simultaneously, though all some distortions can be arranged with regard to each video pictures, these distortions generally can be connect love for eyes.Yet show two vision signals at the same time when the left and right sides of a screen, regular meeting takes place during nonsynchronous situation, and regular meeting makes one in two video pictures to produce the unsettled phenomenon of drift during these nonsynchronous situations.
Therefore, main purpose of the present invention provides a kind of double-image display device and method thereof that two vision signals can be shown in the screen left and right sides simultaneously and solve above-mentioned asynchronous problem.
For achieving the above object, the invention provides and a kind ofly be used for showing that one first vision signal and one second vision signal are in the double-image display device of the and arranged on left and right sides of a screen, this two vision signal all includes a strange scanning field and an even scanning field, when being shown in this screen simultaneously, this strange scanning field and even scanning field just form a video pictures, this two scanning field all includes the horizontal time-base of a predetermined number, described display unit comprises: (1) first digital circuit comprises:
(a) a synchronous demultiplexer is used for separating the level and the vertical synchronizing signal of first vision signal;
(b) analog/digital converter is used for converting each horizontal time-base of first vision signal to a digital signal; And
(c) line buffer is used for storing this digital signal; (2) second digital circuits comprise:
(a) a synchronous demultiplexer is used for separating the level and the vertical synchronizing signal of second vision signal;
(b) analog/digital converter is used for converting each horizontal time-base of second vision signal to a digital signal;
(c) field buffer comprises a plurality of memory locations, is used for storing successively the digital signal that all horizontal time-bases of the one scan field of this second vision signal are produced after changing; (3) one control circuits are electrically connected with described first and second digital circuit, comprising:
Whether strange, the even scanning field that (a) synchronous detector, the synchronizing signal that is used for producing according to first and second digital circuit detect described first and second vision signal is homologous field and produces an output;
(b) a field buffer control device, be used for controlling the storage of digital signal in the described field buffer, the digital signal that first predetermined location of wherein said second vision signal produces is to begin storage by the original position of this field buffer successively, the digital signal that second predetermined location of described second vision signal produces then be according to the output of this synchronizing indicator determine its in position that this field buffer begins to store so that two scanning fields of this first and second vision signal be shown in synchronously on this screen;
(c) signal combiner, be used for taking out the digital signal and the interior digital signal of described field buffer that are stored in the described line buffer, form a synthetic digital signal then successively, the digital signal in the described field buffer is begun to take out one by one by the original position of this field buffer; (4) one digital/analog converters are electrically connected on described control circuit, are used for converting described synthetic digital signal to a synthetic horizontal time-base; And (5) one display control circuits, be electrically connected on described digital/analog converter, be used for described synthetic horizontal time-base is shown on the described screen, so that this first and second vision signal can be shown in the left and right sides of described screen successively.
The present invention also provides a kind of and is used for showing that one first vision signal and one second vision signal are in the double-image display device of the and arranged on left and right sides of a screen, this two vision signal all includes a strange scanning field and an even scanning field, when being shown in this screen simultaneously, this strange scanning field and even scanning field just form a video pictures, this two scanning field all includes the horizontal time-base of a predetermined number, this display unit comprises: (1) first digital circuit comprises:
(a) a synchronous demultiplexer is used for separating the level and the vertical synchronizing signal of first vision signal;
(b) analog/digital converter is used for converting each horizontal time-base of first vision signal to digital signal, and
(c) line buffer is used for storing this digital signal; (2) second digital circuits comprise:
(a) a synchronous demultiplexer is used for separating the level and the vertical synchronizing signal of second vision signal;
(b) analog/digital converter is used for converting each horizontal time-base of second vision signal to a digital signal;
(c) field buffer comprises a plurality of memory locations, is used for successively opening the digital signal that all horizontal time-bases that the beginning position begins to store a scanning field of described second vision signal are produced from it after changing; (3) one control circuits are electrically connected on described first and second digital circuit, comprising:
Whether strange, the even scanning field that (a) synchronous detector, the synchronizing signal that is used for producing according to first and second digital circuit detect this first and second vision signal is homologous field and produces an output;
(b) a field buffer control device, be used for controlling the output of digital signal in the described field buffer, the digital signal that wherein is stored in first predetermined field of second vision signal in this field buffer is to begin output from the original position of this field buffer successively, and the digital signal of second predetermined field of described second vision signal then is that the output according to this synchronizing indicator decides its position that is begun to export successively by this field buffer so that two scanning field energys of this first and second vision signal are shown on this screen synchronously;
(c) signal combiner is used for taking out and is stored in the digital signal in the described line buffer and takes out a digital signal to form a synthetic digital signal by this field buffer under the control of this field buffer control device; (4) one digital/analog converters are electrically connected on described control circuit, are used for converting described synthetic digital signal to a synthetic horizontal time-base; And (5) one display control circuits, be electrically connected on described digital/analog converter, be used for described synthetic horizontal time-base is shown on the described screen, so that described first and second vision signal can be shown in the left and right sides of this screen successively.
The present invention also provides a kind of and is used for showing that one first vision signal and one second vision signal are in two picture display process of the and arranged on left and right sides of a screen, wherein this two vision signal all includes a strange scanning field and an even scanning field, when being shown in this screen simultaneously, this strange scanning field and even scanning field just form a video pictures, this two scanning field all includes the horizontal time-base of a predetermined number, and this method may further comprise the steps:
(1) isolates the synchronizing signal of first vision signal;
(2) isolate the synchronizing signal of second vision signal;
(3) by first and second vision signal isolated synchronizing signal judge whether the scanning field of this first and second vision signal is homologous field and produces an output;
(4) each horizontal time-base of first vision signal is converted to a digital signal and this digital signal is stored in the line buffer;
(5) each horizontal time-base with each scanning field of second vision signal converts a digital signal to;
(6) digital signal of second predetermined field of this second vision signal original position by a field buffer is begun to deposit in successively, this field buffer comprises a plurality of memory locations, is used for storing the digital signal that all horizontal time-bases of a scanning field of this second vision signal are produced after changing;
(7) digital signal of second predetermined field of determining this second vision signal according to the output in described (3) step opens the beginning memory location in this field buffer, and it is opened the memory location of beginning by this rise and deposit in successively in this field buffer so that this second vision signal can be shown on this screen synchronously with this first vision signal;
(8) with an output of the digital signal in the digital signal in the described line buffer and this field buffer and a synthetic successively combined digital signal, the digital signal in this field buffer is begun to export successively by its original position;
(9) this combined digital signal is converted to a combined horizontal sweep signal;
(10) this combined horizontal sweep signal is shown on this screen, so that this first and second vision signal can be shown in the left and right sides of this screen successively.
The present invention also provides a kind of and is used for showing that one first vision signal and one second vision signal are in two picture display process of the and arranged on left and right sides of a screen, wherein said two vision signals all include a strange scanning field and an even scanning field, when being shown in this screen simultaneously, this strange scanning field and even scanning field just form a video pictures, this two scanning field all includes the horizontal time-base of a predetermined number, and this method may further comprise the steps:
(1) isolates the synchronizing signal of first vision signal;
(2) isolate the synchronizing signal of second vision signal;
(3) by first and second vision signal isolated synchronizing signal judge whether the scanning field of this first and second vision signal is homologous field and produces an output;
(4) each horizontal time-base of first vision signal is converted to a digital signal and this digital signal is stored in the line buffer;
(5) each horizontal time-base with each scanning field of second vision signal converts a digital signal to;
(6) digital signal of each scanning field of this second vision signal original position by a field buffer is begun to deposit in successively, this field buffer comprises a plurality of memory locations, is used for storing the digital signal that all horizontal time-bases of a scanning field of this second vision signal are produced after changing;
(7) will be stored in the digital signal of this line buffer and a digital signal of this field buffer and take out a synthetic successively combined digital signal; The digital signal of first predetermined field of this second vision signal is begun to be exported successively by the beginning position of opening of this field buffer; The digital signal of second predetermined field of this second vision signal is then determined position that it is begun to export successively by this field buffer so that two scanning fields of this first and second vision signal are shown on this screen synchronously according to the output in described (3) step;
(8) this combined digital signal is converted to a combined horizontal sweep signal;
(9) this combined horizontal sweep signal is shown on this screen, so that this first and second vision signal is shown in the left and right sides of this screen successively.
Adopt of the present invention pair of picture video display unit and method, can make two different vision signals can be shown in the both sides of a screen simultaneously,, also can obtain stable two pictures and show even these two vision signals are asynchronous.
Fig. 1 is the functional block diagram of double-image display device of the present invention.
Fig. 2 shows the video pictures of two vision signals.
Fig. 3 is the strange scanning field and the even scanning field of two vision signals shown in Figure 2.
Fig. 4 is the composite video picture of two vision signals shown in Figure 2.
Fig. 5 shows the strange scanning field of asynchronous reception two vision signals and the situation of even scanning field.
Fig. 6 is the composite video picture of two vision signals shown in Figure 5.
Fig. 7 shows with a kind of even scanning field storage means that solves asynchronous problem shown in Figure 6.
Fig. 8 is the composite video picture of two vision signals shown in Figure 7.
Fig. 9 shows with a kind of strange scanning field storage means that solves asynchronous problem shown in Figure 6.
Figure 10 is the composite video picture of two vision signals shown in Figure 9.
Figure 11 shows with a kind of even scanning field output intent that solves asynchronous problem shown in Figure 6.
Figure 12 shows with a kind of strange scanning field output intent that solves asynchronous problem shown in Figure 6.
See also Fig. 1 to Fig. 4.Fig. 1 is the functional block diagram of double-image display device 10 of the present invention.Fig. 2 shows the video pictures of two vision signal V1 and V2.Vision signal V1 comprises a plurality of horizontal time-base m1 to m8, and vision signal V2 comprises a plurality of horizontal time-base n1 to n8.Based on the convenience in the explanation, vision signal V1 and V2 are used for simulating two ntsc video signals.The strange scanning field of Fig. 3 display video signal V1 and V2 and even scanning field, just M1/M2 and N1/N2, each strange scanning field or even scanning field comprise a predetermined number () horizontal time-base 4.Display unit 10 is to be used for showing this two vision signals V1 and V2 in the left and right sides of screen, and Fig. 4 shows the two vision signal V1 that produced by display unit 10 and the composite video picture 60 of V2.
First digital circuit 18 comprises: a synchronous demultiplexer 20, the vertical and horizontal-drive signal that is used for separating the first vision signal V1; One analog/digital (A/D) transducer 22 is used for converting each bar horizontal time-base m1 of the first vision signal V1 to a digital signal to m8; And a line buffer (1ine buffer) 24 is used for storing by a digital signal that horizontal time-base converted to.
Second digital circuit 26 comprises: a synchronous demultiplexer 28, the vertical and horizontal-drive signal that is used for separating the second vision signal V2; One analog/digital converter 30 is used for converting each bar horizontal time-base n1 of the second vision signal V2 to a digital signal to n8; And a line buffer 32, it contains a plurality of memory locations and is used for storing successively all digital signals by any one scanning field (N1 or N2) of the second vision signal V2.Field buffer (field buffer) 32 is a first-in first-out buffer (first in/first out buffer).
Whether synchronously synchronizing indicator 40 is the scanning field that is used for judging first and second vision signal V1 and V2 according to the synchronizing signal separator 20 and 28 synchronizing signals that produced of first and second digital circuit 18 and 26 (homologous fields or different) and produce an output.
Field buffer control device 42 is to be used for the control figure signal will how to deposit field buffer 32 in.One of them of the scanning field of the second vision signal V2 (N1 or N2) by successively by field buffer 32 open the beginning position begin to deposit in the field buffer 32, the digital signal that another scanning field of the second vision signal V2 (N2 or N1) is produced then is to determine it in the position that field buffer 32 begins to store according to the output of synchronizing indicator 40, (N1/N2) can be shown in synchronously on the screen 50 so that two scanning fields (m1/m2) of first and second vision signal V1 and V2 reach.
First digital circuit 18 uses a line buffer 24 to store a digital signal, and the reason that second digital circuit 26 uses a field buffer 32 to be used for storing the digital signal that the one scan place has is because the digital signal that will be stored in the line buffer 24 that control circuit 38 can continue is stored in field buffer 32 interior corresponding digital signals and is combined into a synthetic digital signal with one, converts thereof into a synthetic horizontal time-base then and is shown on the screen 50.Because each is stored in digital signal Be Controlled circuit 38 taking-ups at once in the line buffer 24 and is combined into a synthetic digital signal, so first digital circuit 18 does not need all to store with a field buffer all digital signals with the scanning field of the first vision signal V1.
Digital-to-analog (D/A) transducer 46 is electrically connected on the signal combiner 44 of control circuit 38, is used for converting the synthetic digital signal that signal combiner 44 is produced to a synthetic horizontal time-base.48 of display control circuits are electrically connected on digital/analog converter 46, are used for synthetic horizontal time-base is shown to screen 50, so that first and second vision signal V1 and V2 can be shown in the left and right sides of screen 50 successively.
The first vision signal V1 shown in Figure 2 includes two black level sweep signal m2 and m3, and the second vision signal V2 also includes two black level sweep signal n2 and n3.Each vision signal all includes a strange scanning field and an even scanning field, just can form a video pictures when strange scanning field and even scanning field are shown in a screen simultaneously.When transmission video signal, strange scanning field and even scanning field are to be transmitted out in an alternating manner.For example, two of the first vision signal V1 scanning fields are to be transmitted or to be received with following order:
M1, M2, M1, M2, M1, M2 ... and two scanning field N1/N2 of the second vision signal V2 are transmitted in an identical manner or are received.Because vision signal V1 and V2 are produced by different TV stations, first and second digital circuit 18 and 26 strange, the even scanning fields at receiving video signals V1 and V2 have nonsynchronous situation often and produce.For example, the digital signal that is stored in the line buffer 24 of first digital circuit 18 is to belong to strange scanning field (M1), but the field buffer 32 interior corresponding digital signals that are stored in second digital circuit 26 then may belong to even scanning field (N2).When the left and right sides at screen of display video signal V1 and V2, the nonsynchronous situation of scanning field is if inappropriate processing then can produce serious influence to the demonstration of video pictures.Fig. 3 and Fig. 4 will illustrate the program and the result of two synchronous vision signals of combination, and Fig. 5 and Fig. 6 then will explain two problems that nonsynchronous vision signal caused of combination.
Referring to Fig. 3 and Fig. 4, this two figure is program and the result who is used for that combination is described and shows two synchronous vision signal V1 and V2.Fig. 3 shows that strange, the even scanning field M1/M2 of the first vision signal V1 is that strange, even scanning field N1/N2 with the second vision signal V2 is received synchronously.When making up and showing strange scanning field M1 and N1, digital signal m1 and n1 are combined into a synthetic digital signal m1-n1 and are shown on article one scan line (m1-n1) of video pictures 60.Remaining digital signal is also by one by one composition synthetic digital signal m3-n3 then, m5-n5, and m7-n7 also is shown on the 3rd, five, seven scan line of video pictures 60.After strange scanning field M1/N1 was combined and shows, even scanning field M2/N2 also was combined into four synthetic digital signal m2-n2 in an identical manner, m4-n4, and m6-n6, m8-n8, and be shown on second, four, six, eight scan line of video pictures 60.Fig. 4 is compared as can be seen with the video pictures of Fig. 2, and four black numbers signal m2, m3, n2 and n3 are shown in correct position.
See also Fig. 5 and Fig. 6.Fig. 5 shows asynchronous reception two vision signal V1 and the odd even scanning field of V2 and the situation of even scanning field.Fig. 6 is the composite video picture 62 of two vision signals shown in Figure 5.In Fig. 5, strange, the even scanning field M1/M2 of the first vision signal V1 is that even, the strange scanning field N2/N1 with the second vision signal V2 makes up mutually and shows.When making up and showing strange scanning field M1 and even scanning field N2, four synthetic digital signal m1-n2, m3-n4, m5-n6 and m7-n8 are formed and are shown on first and third, five, seven scan line of video pictures 62.Even then scanning field M2 and strange scanning field N1 can be combined into four synthetic digital signal m2-n1, m4-n3, and m6-n5 and m8-n7 also are displayed on second, four, six, eight scan lines of video pictures 62.Can very clearly find position that black level sweep signal n2 and n3 are shown and incorrect by the graphical content on video pictures 62 the right and code name.In fact, in the right-half plane of video pictures 62, all digital signal (n1 of the strange scanning field N1 of the second vision signal V2, n3, n5 n7) is displayed on the position that even scanning field N2 should show, and all digital signals of even scanning field N2 (n2, n4, n6 n8) then is displayed on the position that strange scanning field N1 should show.This wrong problem that shows is owing to combination and shows that two asynchronous vision signal V1 and V2 cause.
The present invention proposes that four kinds of methods solve this problem: Fig. 7 and Fig. 8 shows a kind of even scanning field storage means, Fig. 9 and Figure 10 show a kind of strange scanning field storage means, Figure 11 shows a kind of even scanning field output intent, and Figure 12 shows a kind of strange scanning field output intent.
Fig. 7 and Fig. 8 produce bright a kind of even scanning field storage means and result.Fig. 7 shows with a kind of even scanning field storage means that solves asynchronous problem shown in Figure 6, and Fig. 8 is the composite video picture 64 of two vision signal V1 shown in Figure 7 and V2.This method be the normal storage position (open beginning position by field buffer 32 begin successively deposit) of all digital signals from field buffer 32 with even scanning field N2 to moving down one to form a new even scanning field N2 ', the strange all digital signals of scanning field N1 then are stored in the normal storage position in the field buffer 32.The content of idol scanning field N2 ' and strange scanning field N1 is shown among Fig. 7.The video pictures that shows 64 of Fig. 8 is to be combined by four field M1/N2 ' and M2/N1.Though the digital signal n8 of even as seen from Figure 8 scanning field N2 has been rejected in being stored in field buffer 32 time, all digital signal n1 that are presented at the second vision signal V2 on video pictures 64 the right arrange to n7 in order.A horizontal time-base casting out the video pictures lower edge on the screen of reality is difficult to usually and can be found out by naked eyes, and the method for therefore this utilization storage displacement can the above-mentioned asynchronous problem of effectively solution.
The disclosed even scanning field storage means of first method is such at the execution mode of display unit 10: when the digital signal of even scanning field N2 of the storage second vision signal V2 is in field buffer 32, if the output of synchronizing indicator 40 shows that the scanning field of first and second vision signal V1 and V2 is a homologous field, then the input of field buffer control device 42 controlling filed buffers 32 so that the digital signal of even scanning field N2 begin to deposit in successively in the field buffer 32 by the position of the next digital signal that opens the beginning position of field buffer 32.If it is different that the output of synchronizing indicator 40 shows the scanning field of first and second vision signal V1 and V2, then the input of field buffer control device 42 controlling filed buffers 32 so that the digital signal of even scanning field N2 begin to deposit in successively in the field buffer 32 by the beginning position of opening of field buffer 32.
When the digital signal with the even scanning field N2 of the second vision signal V2 is stored in field buffer 32, if the output of synchronizing indicator 40 shows that the scanning field of first and second vision signal V1 and V2 is a homologous field, even that is to say scanning field N2 is made up with the first vision signal V1 when exporting control circuit 38 to asynchronously and is shown, though this is because first and second vision signal V1 and V2 deposit in line buffer 24 and the field buffer 32 with homologous field, but this moment control circuit 38 numerical data of from field buffer 32, being taken out to be the second vision signal V2 temporarily be stored in numerical data in the field buffer 32 at last once scanning field, yet the numerical data that control circuit 38 is taken out from line buffer 24 is the numerical data of the first vision signal V1 in this time being stored in line buffer 24, thereby cause the scanning field of asynchronous demonstration, just as Fig. 5 and the described situation of Fig. 6.Here it is why when the output of synchronizing indicator 40 shows that the scanning field of first and second vision signal V1 and V2 is homologous field, and field buffer control device 42 can come into effect the reason that first method solves asynchronous problem.
Fig. 9 and Figure 10 show second method and the result who is produced thereof.Fig. 9 shows with a kind of strange scanning field storage means that solves asynchronous problem shown in Figure 6, and Figure 10 is the composite video picture 66 of two vision signal V1 shown in Figure 9 and V2.Second method is that the first digit signal n1 with strange scanning field N1 gives up, then with second digit signal n3 and subsequent digital signal (n5, n7) begun to store forming a new strange scanning field N1 ' by the original position of field buffer 32, all digital signals of even scanning field N2 then are that the beginning position of opening by field buffer 32 begins to store successively.The storage means of strange scanning field N1 can be finished by field buffer control device 42, when storing strange scanning field N1 to field buffer 32, the input of field buffer control device 42 controlling filed buffers 32 is not so that first digit signal n1 is deposited in field buffer 32, and second digit signal n3 and subsequent digital signal (n5, n7) then can begin from the original position of field buffer 32 to deposit in successively, Fig. 9 shows the content of even scanning field N2 and new strange scanning field N1 '.
Video pictures 66 shown in Figure 10 is to form by constitutional diagram 9 shown four field M1/N2 and M2/N1 '.Though the digital signal n1 of the strange scanning field N1 of the second vision signal V2 has been rejected when being stored in field buffer 32 as seen from Figure 10, all digital signal n2 that are presented at the second vision signal V2 on video pictures 66 the right arrange to n8 in order.A horizontal time-base casting out the video pictures upper limb on the screen of reality is difficult to usually and can be found out by naked eyes, the above-mentioned asynchronous problem of solution that the method for therefore this utilization storage displacement can be imitated very much.
The disclosed strange scanning field storage means of second method is such at the execution mode of display unit 10: when the digital signal of strange scanning field N1 of the storage second vision signal V2 during in field buffer 32, if the output of synchronizing indicator 40 shows that the scanning field of first and second vision signal V1 and V2 is a homologous field, then the input of field buffer control device 42 controlling filed buffers 32 is not so that the first digit signal n1 of strange scanning field N1 is deposited in field buffer 32, and second digit signal n3 and subsequent digital signal (n5 n7) then can begin from the original position of field buffer 32 to deposit in successively.If it is different that the output of synchronizing indicator 40 shows the scanning field of first and second vision signal V1 and V2, then the input that field buffer control device 42 can controlling filed buffers 32 so that the digital signal of strange scanning field N1 begin to deposit in successively in the field buffer 32 by the beginning position of opening of field buffer 32.
When the digital signal with the strange scanning field N1 of the second vision signal V2 is stored in field buffer 32, if the output of synchronizing indicator 40 shows that the scanning field of first and second vision signal V1 and V2 is a homologous field, strange that is to say scanning field N1 can be made up with the first vision signal V1 asynchronously and be shown when exporting control circuit 38 to, just as Fig. 5 and the described situation of Fig. 6.Here it is why when the output of synchronizing indicator 40 shows that the scanning field of first and second vision signal V1 and V2 is homologous field, and field buffer control device 42 comes into effect the reason that second method solves asynchronous problem.
Above-mentioned first kind and second method are by controlling strange scanning field N1 and above-mentioned asynchronous problem is solved in the memory location of even scanning field N2 in field buffer 32, by field buffer 32 output digital signals the time, all digital signals of strange scanning field N1 and even scanning field N2 all are that original position by field buffer 32 begins to export in these two kinds of methods.Following the third and the 4th kind of method then are by controlling strange scanning field N1 and the way of output of even scanning field N2 in field buffer 32 solves above-mentioned asynchronous problem.All digital signals of strange scanning field N1 and even scanning field N2 all are that original position by field buffer 32 begins to store in these two kinds of methods.
When implementing following two kinds when taking out storage meanss, field buffer control device 42 shown in Figure 1 will change to some extent with the function of signal combiner 44.Here the function of field buffer control device 42 is to be used for controlling the output of strange, even scanning field digital signal of the second vision signal V2 so that two scanning field N1 of second vision signal and N2 can be by appropriate display on screens 50 according to the output of synchronizing indicator 40.Signal combiner 44 then is to be used for taking out the digital signal in the line buffer 24 of first digital circuit 18 and to take out a corresponding digital signal in the field buffer 32 of second digital circuit 26 under the control of field buffer control device 42, successively these two digital signal combination is got up to form a combined digital signal then.
Figure 11 shows with a kind of even scanning field output intent that solves Fig. 5 and asynchronous problem shown in Figure 6.This method will be stored in the digital signal (n2 of the even scanning field N2 in the field buffer 32, n4, ...) postponing the time output of a digital signal, the digital signal that is stored in the strange scanning field N1 in the field buffer 32 then is to begin to export successively with the beginning position of opening of normal mode by field buffer 32.Figure 11 shows the output order of this method, and the synthetic video picture that it produced is then identical with video pictures 64 shown in Figure 8.
The disclosed even scanning field output intent of the third method is such at the execution mode of display unit 10: when the digital signal of the even scanning field N2 in will being stored in field buffer 32 is exported, if it is different that the output of synchronizing indicator 40 shows the scanning field of first and second vision signal V1 and V2, then the output of field buffer control device 42 controlling filed buffers 32 is so that the digital signal of even scanning field N2 is postponed the time output of a digital signal by field buffer 32.If it is homologous field that the output of synchronizing indicator 40 shows the scanning field of first and second vision signal V1 and V2, then the output of field buffer control device 42 controlling filed buffers 32 so that the digital signal of even scanning field N2 by field buffer 32 open the beginning position begin to export successively.
Figure 12 shows with a kind of strange scanning field output intent that solves Fig. 5 and asynchronous problem shown in Figure 6.This method will be stored in the interior very first digit signal n1 of scanning field N1 of buffer 32 original positions to be given up and is begun to export successively by digital signal n3 on the next position of original position and subsequent digital signal, and the digital signal that is stored in the even scanning field N2 in the field buffer 32 then is to begin to export successively with the beginning position of opening of normal mode by field buffer 32.Figure 12 shows the output order of this method, and the synthetic video picture that it produced is then identical with video pictures 66 shown in Figure 10.
The 4th kind of disclosed even scanning field output intent of method is such at the execution mode of display unit 10: when the digital signal of strange scanning field N1 is exported in will being stored in field buffer 32, if it is different that the output of synchronizing indicator 40 shows the scanning field of first and second vision signal V1 and V2, then the output of field buffer control device 42 controlling filed buffers 32 so that field buffer 32 digital signal n3 on the next position of original position and digital signal are thereafter exported successively.If it is homologous field that the output of synchronizing indicator 40 shows the scanning field of first and second vision signal V1 and V2, then the output of field buffer control device 42 controlling filed buffers 32 so that the digital signal of strange scanning field N1 begin to export successively by the beginning position of opening of field buffer 32.
The above only is the preferred embodiments of the present invention, and those skilled in the art can make various modification and change, and do not break away from the spirit and scope of the present invention, so it all should covered within the scope of claims.
Claims (20)
1, a kind ofly is used for showing that one first vision signal and one second vision signal are in the double-image display device of the and arranged on left and right sides of a screen, this two vision signal all includes a strange scanning field and an even scanning field, when being shown in this screen simultaneously, this strange scanning field and even scanning field just can form a video pictures, this two scanning field all includes the horizontal time-base of a predetermined number, described display unit comprises: (1) first digital circuit comprises:
(a) a synchronous demultiplexer is used for separating the level and the vertical synchronizing signal of first vision signal;
(b) analog/digital converter is used for converting each horizontal time-base of first vision signal to a digital signal; And
(c) line buffer is used for storing this digital signal; (2) second digital circuits comprise:
(a) a synchronous demultiplexer is used for separating the level and the vertical synchronizing signal of second vision signal;
(b) analog/digital converter is used for converting each horizontal time-base of second vision signal to a digital signal;
(c) field buffer comprises a plurality of memory locations, is used for storing successively the digital signal that all horizontal time-bases of the one scan field of this second vision signal are produced after changing; (3) one control circuits are electrically connected with described first and second digital circuit, comprising:
Whether strange, the even scanning field that (a) synchronous detector, the synchronizing signal that is used for producing according to first and second digital circuit detect described first and second vision signal is homologous field and produces an output;
(b) a field buffer control device, be used for controlling the storage of digital signal in the described field buffer, the digital signal that first predetermined location of wherein said second vision signal produces is to begin storage by the original position of this field buffer successively, the digital signal that second predetermined location of described second vision signal produces then be according to the output of this synchronizing indicator determine its in position that this field buffer begins to store so that two scanning fields of this first and second vision signal be shown in synchronously on this screen;
(c) signal combiner, be used for taking out the digital signal and the interior digital signal of described field buffer that are stored in the described line buffer, form a synthetic digital signal then successively, the digital signal in the described field buffer is begun to take out one by one by the original position of this field buffer; (4) one digital/analog converters are electrically connected on described control circuit, are used for converting described synthetic digital signal to a synthetic horizontal time-base; Reach (5) one display control circuits and be electrically connected on described digital/analog converter, be used for described synthetic horizontal time-base is shown on the described screen, so that this first and second vision signal can be shown in the left and right sides of described screen successively.
2, the described double-image display device of claim 1 also comprises a display control switch, and this switch includes an output and is electrically connected on described display control circuit; One first input end is electrically connected on described digital/analog converter, is used for receiving described synthetic horizontal time-base; And one second input be used for receiving described first vision signal, described display control switch is used to select to connect a end in this two input as the input of described display control circuit, thereby makes described double-image display device show that successively described first and second vision signal is in the left and right sides of described screen or show that separately this first vision signal is on described screen.
3, double-image display device as claimed in claim 1, wherein said first predetermined field is a strange scanning field and described second predetermined field is an even scanning field, when digital signal that should the idol scanning field is stored in described field buffer, if the output of this synchronizing indicator shows that described first and second vision signal is a homologous field, then this field buffer control device control this field buffer input so that digital signal that should the idol scanning field begin to deposit in successively from the next position of this field buffer original position successively.
4, double-image display device as claimed in claim 1, wherein said first predetermined field is an even scanning field and described second predetermined field is a strange scanning field, when the digital signal of this strange scanning field of storage during in this field buffer, if the output of described synchronizing indicator shows that described first and second vision signal is a homologous field, then described field buffer control device control described field buffer input so that the second digit signal of described strange scanning field and described thereafter digital signal begin to deposit in successively from this field buffer original position.
5, double-image display device as claimed in claim 1, wherein in the digital signal of described second predetermined field of storage during in described field buffer, if it is different that the output of described synchronizing indicator shows described first and second vision signal, then described field buffer control device control this field buffer input so that the digital signal of this second predetermined field begin to deposit in proper order from the original position of this field buffer.
6, double-image display device as claimed in claim 1, wherein said field buffer are a first-in first-out register.
7, a kind ofly be used for showing that one first vision signal and one second vision signal are in the double-image display device of the and arranged on left and right sides of a screen, this two vision signal all includes a strange scanning field and an even scanning field, when being shown in this screen simultaneously, this strange scanning field and even scanning field just can form a video pictures, this two scanning field all includes the horizontal time-base of a predetermined number, this display unit comprises: (1) first digital circuit comprises:
(a) a synchronous demultiplexer is used for separating the level and the vertical synchronizing signal of first vision signal;
(b) analog/digital converter is used for converting each horizontal time-base of first vision signal to digital signal, and
(c) line buffer is used for storing this digital signal; (2) second digital circuits comprise:
(a) a synchronous demultiplexer is used for separating the level and the vertical synchronizing signal of second vision signal;
(b) analog/digital converter is used for converting each horizontal time-base of second vision signal to a digital signal;
(c) field buffer comprises a plurality of memory locations, is used for successively from open the digital signal that all horizontal time-bases that the beginning position begins to store a scanning field of described second vision signal are produced after changing; (3) one control circuits are electrically connected on described first and second digital circuit, comprising:
Whether strange, the even scanning field that (a) synchronous detector, the synchronizing signal that is used for producing according to first and second digital circuit detect this first and second vision signal is homologous field and produces an output;
(b) a field buffer control device, be used for controlling the output of digital signal in the described field buffer, the digital signal that wherein is stored in first predetermined field of second vision signal in this field buffer is to begin output from the original position of this field buffer successively, and the digital signal of second predetermined field of described second vision signal then is to determine position that it is begun to export successively by this field buffer so that two scanning fields of this first and second vision signal are shown on this screen synchronously according to the output of this synchronizing indicator;
(c) signal combiner is used for taking out and is stored in the digital signal in the described line buffer and takes out a digital signal to form a synthetic digital signal by this field buffer under the control of this field buffer control device; (4) one digital/analog converters are electrically connected on described control circuit, are used for converting described synthetic digital signal to a synthetic horizontal time-base; And (5) one display control circuits, be electrically connected on described digital/analog converter, be used for described synthetic horizontal time-base is shown on the described screen, so that described first and second vision signal can be shown in the left and right sides of this screen successively.
8, double-image display device as claimed in claim 7 also comprises a display control switch, and this switch comprises an output, is electrically connected on described display control circuit; One first input end is electrically connected on described digital/analog converter, is used for receiving described synthetic horizontal time-base; And one second input, be used for receiving described first vision signal, described switch is used to select to connect a end in this two input as the input of this display control circuit, makes this double-image display device show that successively this first and second vision signal is in the left and right sides of described screen or show that separately this first vision signal is on this screen thus.
9, double-image display device as claimed in claim 7, wherein said first predetermined field is a strange scanning field and described second predetermined field is an even scanning field, when digital signal that should the idol scanning field by from described field buffer output the time, if it is different that the output of described synchronizing indicator shows described first and second vision signal, then this field buffer control device is controlled the output of this field buffer so that the output of digital signal that should the idol scanning field is delayed the time of a digital signal.
10, double-image display device as claimed in claim 7, wherein said first predetermined field is an even scanning field and described second predetermined field is a strange scanning field, when the digital signal of this strange scanning field by from this field buffer output the time, if it is different that the output of described synchronizing indicator shows described first and second vision signal, then this field buffer control device control this field buffer output so that digital signal on the next position of this field buffer original position and subsequent digital signal begin to be exported successively.
11, double-image display device as claimed in claim 7, wherein when described field buffer is exported the digital signal of described second predetermined field, if the output of this synchronizing indicator shows that described first and second vision signal is a homologous field, then this field buffer control device control this field buffer output so that the digital signal of this second predetermined field begin to export successively from the original position of this field buffer.
12, double-image display device as claimed in claim 7, wherein said field buffer are a first-in first-out register.
13, a kind ofly be used for showing that one first vision signal and one second vision signal are in two picture display process of the and arranged on left and right sides of a screen, wherein this two vision signal all includes a strange scanning field and an even scanning field, when being shown in this screen simultaneously, this strange scanning field and even scanning field just form a video pictures, this two scanning field all includes the horizontal time-base of a predetermined number, and this method may further comprise the steps:
(1) isolates the synchronizing signal of first vision signal;
(2) isolate the synchronizing signal of second vision signal;
(3) by first and second vision signal isolated synchronizing signal judge whether the scanning field of this first and second vision signal is homologous field and produces an output;
(4) each horizontal time-base of first vision signal is converted to a digital signal and this digital signal is stored in the line buffer;
(5) each horizontal time-base with each scanning field of second vision signal converts a digital signal to;
(6) digital signal of second predetermined field of this second vision signal original position by a field buffer is begun to deposit in successively, this field buffer comprises a plurality of memory locations, is used for storing the digital signal that all horizontal time-bases of a scanning field of this second vision signal are produced after changing;
(7) digital signal of second predetermined field of determining this second vision signal according to the output in described (3) step opens the beginning memory location in this field buffer, and it is opened by this memory location of beginning deposits in this field buffer successively so that this second vision signal and this first vision signal are shown on this screen synchronously;
(8) with an output of the digital signal in the digital signal in the described line buffer and this field buffer and a synthetic successively combined digital signal, the digital signal in this field buffer is begun to export successively by its original position;
(9) this combined digital signal is converted to a combined horizontal sweep signal;
(10) this combined horizontal sweep signal is shown on this screen, so that this first and second vision signal is shown in the left and right sides of this screen successively.
14, method as claimed in claim 13, wherein said first predetermined field is a strange scanning field and this second predetermined field is an even scanning field, when digital signal that should the idol scanning field is stored in this field buffer, if the output in described (3) step shows that this first and second vision signal is a homologous field, digital signal that then should the idol scanning field begins to deposit in successively from the next position of this field buffer original position.
15, method as claimed in claim 13, wherein said first predetermined field is an even scanning field and this second predetermined field is a strange scanning field, when digital signal that will this strange scanning field is stored in this field buffer, if the output in described (3) step shows that this first and second vision signal is a homologous field, then the second digit signal of this strange scanning field and subsequent digital signal will begin from the original position of this field buffer to deposit in successively.
16, method as claimed in claim 13, wherein when the digital signal with this second predetermined field is stored in this field buffer, if it is different that the output in described (3) step shows this first and second vision signal, then the digital signal of this second predetermined field will begin from the original position of this field buffer to deposit in successively.
17, a kind ofly be used for showing that one first vision signal and one second vision signal are in two picture display process of the and arranged on left and right sides of a screen, wherein said two vision signals all include a strange scanning field and an even scanning field, when being shown in this screen simultaneously, this strange scanning field and even scanning field just can form a video pictures, this two scanning field all includes the horizontal time-base of a predetermined number, and this method may further comprise the steps:
(1) isolates the synchronizing signal of first vision signal;
(2) isolate the synchronizing signal of second vision signal;
(3) by first and second vision signal isolated synchronizing signal judge whether the scanning field of this first and second vision signal is homologous field and produces an output;
(4) each horizontal time-base of first vision signal is converted to a digital signal and this digital signal is stored in the line buffer;
(5) each horizontal time-base with each scanning field of second vision signal converts a digital signal to;
(6) digital signal of second predetermined field of this second vision signal original position by a field buffer is begun to deposit in successively, this field buffer comprises a plurality of memory locations, is used for storing the digital signal that all horizontal time-bases of a scanning field of this second vision signal are produced after changing;
(7) will be stored in the digital signal of this line buffer and a digital signal of this field buffer and take out a synthetic successively combined digital signal; The digital signal of first predetermined field of this second vision signal is begun to be exported successively by the beginning position of opening in this field buffer; The digital signal of second predetermined field of this second vision signal is then determined position that it is begun to export successively by this field buffer so that two scanning fields of this first and second vision signal are shown on this screen synchronously according to the output in described (3) step;
(8) this combined digital signal is converted to a combined horizontal sweep signal;
(9) this combined horizontal sweep signal is shown on this screen, so that this first and second vision signal is shown in the left and right sides of this screen successively.
18, method as claimed in claim 17, wherein said first predetermined field is a strange scanning field and described second predetermined field is an even scanning field, in digital signal that should the idol scanning field during from this field buffer output, if it is different that the output in described (3) step shows this first and second vision signal, the output of digital signal that then should the idol scanning field will be delayed the time of a digital signal.
19, method as claimed in claim 17, wherein said first predetermined field is an even scanning field and described second predetermined field is a strange scanning field, in digital signal that will this strange scanning field during from described field buffer output, if it is different that the output in described (3) step shows this first and second vision signal, then the digital signal and subsequent the digital signal that are stored on the next position of this field buffer original position of this strange scanning field will begin to be exported successively.
20, method as claimed in claim 17, wherein when from this field buffer, taking out the digital signal of this second predetermined field, if the output in described (3) step shows that described first and second vision signal is a homologous field, then this second predetermined field is stored in digital signal in this field buffer and will be successively begins output from the original position of this field buffer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97102261A CN1189045A (en) | 1997-01-20 | 1997-01-20 | Double-image display device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97102261A CN1189045A (en) | 1997-01-20 | 1997-01-20 | Double-image display device and method |
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| Publication Number | Publication Date |
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| CN1189045A true CN1189045A (en) | 1998-07-29 |
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| CN97102261A Pending CN1189045A (en) | 1997-01-20 | 1997-01-20 | Double-image display device and method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1314265C (en) * | 1998-07-30 | 2007-05-02 | 提维股份有限公司 | Multimedia time warping system |
| CN1315330C (en) * | 2003-05-12 | 2007-05-09 | 瑞昱半导体股份有限公司 | Video-frequency signal processing method and apparatus thereof |
| CN100366073C (en) * | 2004-04-06 | 2008-01-30 | C&S技术有限公司 | Equal-interval vertical image conversion method and apparatus for converting CIF image into NTSC image |
| CN101137032B (en) * | 2006-08-31 | 2011-02-09 | 北京海尔集成电路设计有限公司 | High-definition digital television SOC chip dual-mode structure |
| CN101272464B (en) * | 2003-06-02 | 2011-08-24 | 迪斯尼实业公司 | Media playback apparatus, method and system for picture-in-picture representation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314265C (en) * | 1998-07-30 | 2007-05-02 | 提维股份有限公司 | Multimedia time warping system |
| US8380041B2 (en) | 1998-07-30 | 2013-02-19 | Tivo Inc. | Transportable digital video recorder system |
| CN1315330C (en) * | 2003-05-12 | 2007-05-09 | 瑞昱半导体股份有限公司 | Video-frequency signal processing method and apparatus thereof |
| CN101272464B (en) * | 2003-06-02 | 2011-08-24 | 迪斯尼实业公司 | Media playback apparatus, method and system for picture-in-picture representation |
| CN100366073C (en) * | 2004-04-06 | 2008-01-30 | C&S技术有限公司 | Equal-interval vertical image conversion method and apparatus for converting CIF image into NTSC image |
| US9967534B1 (en) | 2004-11-19 | 2018-05-08 | Tivo Solutions Inc. | Digital video recorder video editing system |
| CN101137032B (en) * | 2006-08-31 | 2011-02-09 | 北京海尔集成电路设计有限公司 | High-definition digital television SOC chip dual-mode structure |
| CN108766386A (en) * | 2013-01-18 | 2018-11-06 | 索尼公司 | Equipment for receiving signal from source device |
| CN108766386B (en) * | 2013-01-18 | 2021-09-03 | 索尼公司 | Device for receiving signals from a source device |
| CN105187733A (en) * | 2014-06-06 | 2015-12-23 | 腾讯科技（北京）有限公司 | Video processing method, device and terminal |
| CN105187733B (en) * | 2014-06-06 | 2019-03-01 | 腾讯科技（北京）有限公司 | Method for processing video frequency, device and terminal |
| CN106681674A (en) * | 2015-11-05 | 2017-05-17 | 丰唐物联技术（深圳）有限公司 | Display control method and system of virtual reality display |
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