JP2001119607A - Automatic phase adjusting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic phase adjusting device that quickly executes phase adjustment of a plurality of image signals. SOLUTION: This automatic phase adjusting device is provided with a reference phase storage section (52), that stores a reference phase signal generated by a horizontal synchronizing signal of a reference video signal, a phase comparison section (54) that compares the reference phase signal stored in the reference phase storage section (52) with a comparison phase signal generated on the basis of the horizontal synchronizing signal of the reference video signal, and a phase analysis section (55) that generates phase difference data to control the phase of the comparison video signal, on the basis of the result of comparison.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an automatic phase adjusting device for synchronizing the phases of a plurality of video signals.

[0002]

2. Description of the Related Art An operation of editing a video signal includes a process of synthesizing a plurality of video signals. The video signal has a unique phase. When the phases of a plurality of video signals are synchronized, the edited video signal changes smoothly. The process of combining a plurality of images is performed by the image editing system.

FIG. 3 shows a conventional image editing system.
The image editing system 1 shown in FIG.
0, video switcher 11, video signal distributor 12
, A phase detection device 13, a monitoring device 14, and first to n-th material sources 15-1 to 15-n.

The synchronizing signal generator 10 includes a video switcher 11, a phase detecting device 13, a first to n-th material generating sources 15,
Connect to -1 to 15-n. The video switcher 11 is connected to the video signal distributor 12 and the phase detector 13. The video signal distributor 12 is connected to a phase detection device 13 and an external device (not shown). The phase detection device 13 is connected to the monitoring device 14. The first to n-th material sources 15-1 to 15-n are connected to the video switcher 11.

[0005] The synchronization signal generator 10 is a circuit for generating a reference black burst signal. The reference black burst signal includes a reference horizontal synchronization signal RH, a reference vertical synchronization signal RV, and a reference color subcarrier (subcarrier) RSC. This reference black burst signal is generated based on an image signal serving as an operation reference of the image editing system 1.

The synchronization signal generator 10 includes a phase detector 13
To output the first clock signal C1. The synchronization signal generator 10 outputs the second clock signal C2 to the first to n-th material generation sources 15-1 to 15-n. Synchronous signal generator 10
Outputs a reference black burst (BB) signal BB0 to the video switcher 11. First clock signal C1
And the contents of the second clock signal C2 are the same as the contents of the reference black burst signal BB0. In the phase detector 13 and the first and second material generation sources 15-1 to 15-n, signals output from the synchronization signal generator 10 are used for adjusting operation timing. Therefore, different names are given to signals having the same contents.

[0007] The first material source 15-1 receives a first comparison BB signal.
Outputs BB1. The second material source 15-2 is the second comparison BB
Outputs signal BB2. The third material source 15-3 is the third comparison B
Outputs B signal BB3. The n-th source 15-n outputs an n-th comparison BB signal BBn. The first to n-th comparison BB signals BB1
BBn are composed of the comparison horizontal synchronization signal CH, the comparison vertical synchronization signal CV, and the comparison color subcarrier CSC. The first to n-th comparison BB signals BB1 to BBn are video signals indicating a video material to be combined with the reference video signal. First to n-th material sources 15-1 to
15-n has an adjustment circuit for manually adjusting the phases of the comparison horizontal synchronization signal, the comparison vertical synchronization signal, and the comparison color subcarrier signal.

The video switcher 11 has a reference BB signal BB
A switcher circuit for selecting and outputting 0 and the first to n-th comparison BB signals BB1 to BBn. The video signal distributor 12 is a switcher circuit that switches an output destination for outputting a BB signal based on an instruction from the phase detection device 13. The phase detection device 13 generates a reference horizontal phase signal, a reference vertical phase signal, and a reference color phase signal from the horizontal synchronization signal, the vertical synchronization signal, and the color subcarrier signal of the reference BB signal BB0. The phase detection device 13 calculates the first to n-th comparison BB signals BB1 to BBn from the horizontal synchronization signal, the vertical synchronization signal, and the color subcarrier signal.
A comparison horizontal phase signal, a comparison vertical phase signal, and a comparison color phase signal are generated. The monitoring circuit 14 is a display device including a waveform monitor and a vector scope. The waveform monitor
The reference horizontal phase signal, the reference vertical phase signal, the comparison horizontal phase signal, and the comparison vertical phase signal are displayed. The vector monitor displays the reference color phase signal and the comparison color phase signal.

The synchronization between the phase of the reference BB signal BB0 and the phases of the first to n-th comparison BB signals BB1 to BBn is manually adjusted.
The display content of the monitoring device 14 is recognized by the user. The user refers to the display contents of the monitoring device 14 and refers to the first to n-th
The adjustment circuits of the material sources BB1 to BBn are operated.

A technique for adjusting the phase of a video signal is disclosed in
It is disclosed in JP-A-10-23299 and JP-A-11-4360. These publications disclose techniques in which an expected phase adjustment width is set in advance.

[0011]

SUMMARY OF THE INVENTION First to nth material sources
The phase adjustment of 15-1 to 15-n is manually performed by an operator. The manual adjustment of the phase requires a skilled operation.
The manual adjustment of the phase is performed when the image editing system is installed. The manual adjustment of the phase is executed when the signal source of the reference BB signal BB0 or the first to n-th comparison BB signals BB1 to BBn is changed. Manual adjustment of the phase cannot be completed quickly. If manual phase adjustment is not completed quickly,
The operation of the installed image editing system is delayed. If the manual phase adjustment is not completed quickly, the restart of operation after changing the signal source is delayed.

The present invention provides an automatic phase adjustment device in which the phase adjustment of a plurality of image signals is quickly performed.

[0013]

According to the present invention, there is provided a table search apparatus for storing a reference phase signal generated based on a horizontal synchronization signal of a reference video signal.
A phase comparison unit (54) for comparing the reference phase signal stored in the reference phase storage unit (52) with a comparison phase signal generated based on the horizontal synchronization signal of the comparison video signal; A phase analysis unit (55) for generating phase difference data for controlling the phase of the comparison video signal.

In another table search apparatus according to the present invention, the reference phase signal comprises a reference horizontal synchronization phase signal. In another table search apparatus according to the present invention, the comparison phase signal comprises a comparison horizontal synchronization phase signal.

Another table retrieval apparatus according to the present invention includes a reference phase storage section (52) for storing a reference phase signal generated based on a horizontal synchronization signal and a color synchronization signal of a reference video signal, and a reference phase storage section (52). 52) comparing the reference phase signal stored in (52) with the comparison phase signal generated based on the horizontal synchronization signal and the color synchronization signal of the comparison video signal, and based on the result of the comparison, A phase analysis unit (55) for generating phase difference data for controlling the phase of the comparison video signal is provided.

In another table search apparatus according to the present invention, the reference phase signal comprises a reference horizontal synchronization phase signal and a reference color phase signal, and the comparison phase signal comprises a comparison horizontal synchronization phase signal and a comparison color phase signal.

Another table retrieval apparatus according to the present invention comprises: a reference phase storage section (52) for storing a reference phase signal generated based on a horizontal synchronization signal, a vertical synchronization signal, and a color synchronization signal of a reference video signal; A phase comparison unit (54) for comparing the reference phase signal stored in the phase storage unit (52), the comparison phase signal generated based on the horizontal synchronization signal, the vertical synchronization signal, and the color synchronization signal of the comparison video signal; A phase analysis unit (55) for generating phase difference data for controlling the phase of the comparison video signal based on a result of the comparison is provided.

In another table search apparatus according to the present invention, the reference phase signal comprises a reference horizontal synchronization phase signal, a reference vertical synchronization phase signal, and a comparison color phase synchronization signal, and the comparison phase signal is compared with the comparison horizontal synchronization phase signal. It consists of a vertical synchronization phase signal and a comparison color phase synchronization signal.

Another table retrieval apparatus according to the present invention includes a comparison phase storage section (54) for storing a comparison phase signal.
The phase comparing section (55) compares the reference phase signal stored in the reference phase storage section (52) with the comparison phase signal stored in the comparison phase storage section.

In another table search apparatus according to the present invention, the reference video signal comprises a reference black burst signal, and the comparison video signal comprises a comparison black burst signal.

[0021]

FIG. 1 shows an image editing system according to the present invention. The image editing system 2 shown in the figure includes a synchronization signal generator 20, a video switcher 21, a video signal distributor 22, an automatic phase adjuster 23, and first to n-th material sources 24-1 to 24. Provide -n.

The synchronization signal generator 20 is connected to the video switcher 21, the automatic phase adjuster 23, and the first to n-th material sources 24-1 to 24-n. The video switcher 21 is connected to the video signal distributor 22 and the automatic phase adjuster 23.
The video signal distributor 22 is connected to the automatic phase adjuster 23 and an external device (not shown). The automatic phase adjustment device 23
The first to n-th material sources 24-1 to 24-n are connected. The first to n-th material sources 24-1 to 24-n are connected to the video switcher 11.

The synchronization signal generator 20 is a circuit for generating a reference black burst (BB) signal. The reference black burst signal includes a reference horizontal synchronization signal RH, a reference vertical synchronization signal RV, and a reference color subcarrier (subcarrier) RSC. The reference black burst signal is generated based on an image signal serving as an operation reference of the image editing system 2.

The synchronizing signal generator 20 outputs the first clock signal C1 to the automatic phase adjuster 23. The synchronization signal generator 20 outputs the second clock signal C2 to the first to n-th material generation sources 24-1 to 24-n. The synchronization signal generator 20 outputs a reference black burst (BB) signal BB0 to the video switcher 21. The contents of the first clock signal C1 and the second clock signal C2 are the same as the contents of the reference black burst signal BB0. In the automatic phase adjustment device 23 and the first and second material generation sources 24-1 to 24-n, a signal output from the synchronization signal generator 20 is used for adjusting operation timing. Therefore, different names are given to signals having the same contents.

The first material source 24-1 receives a first comparison BB signal
Outputs BB1. The second material source 24-2 is a second comparison BB
Outputs signal BB2. The third material source 24-3 is the third comparison B
Outputs B signal BB3. The n-th material generation source 24-n outputs an n-th comparison BB signal BBn. The first to n-th comparison BB signals BB1
BBn are composed of the comparison horizontal synchronization signal CH, the comparison vertical synchronization signal CV, and the comparison color subcarrier CSC. The first to n-th comparison BB signals BB1 to BBn are video signals indicating a video material to be combined with the reference video signal.

Each of the first to n-th material sources 24-1 to 24-n has an adjustment circuit for manually adjusting the phases of the comparison horizontal synchronization signal, the comparison vertical synchronization signal, and the comparison color subcarrier signal.

The video switcher 21 receives the reference BB signal BB
A switcher circuit for selecting and outputting 0 and the first to n-th comparison BB signals BB1 to BBn. The video signal distributor 22 is a switcher circuit that switches an output destination for outputting a BB signal based on an instruction from the automatic phase adjuster 23. The automatic phase adjuster 23 generates a reference horizontal phase signal, a reference vertical phase signal, and a reference color phase signal from the horizontal synchronization signal, the vertical synchronization signal, and the color subcarrier signal of the reference BB signal BB0. The automatic phase adjuster 23 outputs the first to n-th comparison BB signals
A comparison horizontal phase signal, a comparison vertical phase signal, and a comparison color phase signal are generated from the horizontal synchronization signal, vertical synchronization signal, and color subcarrier signal of BB1 to BBn. Automatic phase adjuster 23
Generates phase difference data based on these phase signals. The phase difference data includes the first to n-th material sources 24-1 to
Used for phase adjustment of comparison BB signals BB1 to BBn output from 24-n.

FIG. 2 shows the configuration of the automatic phase adjusting device according to the present invention. The automatic phase adjustment device 23 shown in the figure includes a phase detection unit 51, a reference phase storage unit 52, a comparison phase storage unit 53, a phase comparison unit 54, a phase analysis unit 55, and a phase data output unit 56. , A data switching unit 57 and a status capturing unit 58.

The main line video signal output from the video signal distributor 22 is input to the phase detector 51. Phase detector 51
Are connected to a reference phase storage unit 52 and a comparison phase storage unit 53. The output of the reference phase storage unit 52 is
Connect to 4. The output of the comparison phase storage unit 53 is connected to the phase comparison unit 54. The output of the phase comparison unit 54 is connected to a phase analysis unit 55. The output of the phase analysis unit 55 is connected to a phase difference data output unit 56. The output of the phase difference data output unit 56 is connected to the data switching unit 57. The output of the data switching unit 57 is connected to the first to n-th material sources 24-1 to 24-n. The output of the status capturing unit 58 is connected to the data switching unit 57. The video switcher 21 is connected to an input of the status capturing unit 58. The system control panel 30 is connected to the video switcher 21.

The phase detector 51 generates a reference horizontal phase signal, a reference vertical phase signal, and a reference color phase signal from the horizontal synchronization signal, the vertical synchronization signal, and the color subcarrier signal of the basic reference BB signal BB0. The automatic phase adjustment device 23 includes
The first to n-th horizontal synchronization signals HS of the n-th comparison BB signals BB1 to BBn
1 to HSn From the first to nth vertical synchronization signals VS1 to VSn and the first to nth color subcarrier signals CS1 to CSn, the first to nth comparison horizontal phase signals CH1 to CHn and the first to nth comparison vertical phases Signal CV1 ~ C
Vn and first to n-th comparison color phase signals CC1 to CCn are generated. The phase detection unit 51 is a detection circuit.

The reference phase storage section 52 stores a reference horizontal phase signal.
RH, the reference vertical phase signal RV, and the reference color phase signal RC are stored. The reference phase storage unit 52 includes a storage circuit whose storage content can be rewritten. The comparison phase storage unit 52 stores the first to n-th
The comparison horizontal phase signals CH1 to CHn, the first to n-th comparison vertical phase signals CV1 to CVn, and the first to n-th comparison color phase signals CC1 to CCn are stored. The comparison phase storage unit 53 includes a storage circuit whose storage content can be rewritten.

The phase comparator 54 detects a difference between the reference horizontal phase signal RH stored in the reference phase storage 52 and the first to n-th comparison horizontal phase signals CH1 to CHn stored in the comparison phase storage 53. . The phase comparing section 54 detects a difference between the reference vertical phase signal RV stored in the reference phase storage section 52 and the first to n-th comparison vertical phase signals CV1 to CVn stored in the comparison phase storage section 53. The phase comparing section 54 compares the reference color phase signal RC stored in the reference phase storage section 52 with the comparison phase storage section 53.
, The differences between the first to n-th comparison color phase signals CC1 to CCn are detected.

The phase analyzer 55 is a processor that calculates the direction and amount of phase shift based on three pieces of difference data (horizontal, vertical, and color). The phase analysis unit 55 does not generate the phase difference data when the difference data indicates a phase match. When the difference data indicates a phase delay, the phase analysis unit 55 generates a phase feed instruction and phase difference data indicating the amount thereof. When the difference data indicates a phase advance, the phase analysis unit 55 generates a phase return instruction and phase difference data indicating the amount.

The phase difference data output section 56 is a buffer circuit. The phase difference data output unit 56 outputs the first phase difference data and the second phase difference data at the output timing of the data switching unit. The first phase difference data and the second phase difference data are referred to as first to n-th material sources 24-1 as phase difference data S2.
Output to ~ 24-n.

The data switch 57 is a switcher for setting the output destination of the phase difference data. Data switch 57
Selects the first to n-th outputs S2-1 to S2-n based on the control signal output from the status capturing unit 58. The control signal indicates the first to n-th states. When the control signal indicates the first state, the data switch 57 outputs the first output S2
Select -1. When the control signal indicates the second state, the data switch 57 selects the second output S2-2. When the control signal indicates the n-th state, the data switch 57
Select output S2-n.

The status capturing section 58 receives the status signal S1 (FIG. 1) from the video switcher 21. The status signal S1 indicates an input being selected by the video switcher 21. The status capturing section 58 outputs a switching signal corresponding to the content of the status signal S1. The switching signal is transmitted from the video switcher 21 to the first material generation source.
When 24-1 is selected, the first state is set. The switching signal is set to the second state while the video switcher 21 is selecting the second material source 24-2. The switching signal is set to the n-th state while the video switcher 21 is selecting the n-th material source 24-n. When the switching signal indicates the first state, the first output S2-1 is set to be valid. When the switching signal indicates the second state, the second output S2-2 is set to be valid. When the switching signal indicates the n-th state, the n-th output S2-n is set to be valid.

The system control panel 30 comprises an operation switcher operated by the user of the image editing system 2.
The system control panel outputs the selection information. The selection information includes the first to n-th material sources used in the image editing process.
Shows 24-1 to 24-n. The video switcher 21 selects the first to n-th material sources 24-1 to 24-n based on the selection information.

The operation of the automatic phase adjusting device 23 according to the present invention will be described with reference to FIGS.

Processing 1: When the image editing system 2 is started, the synchronization signal generator 20 outputs the reference BB signal BB0 and the first and second clock signals C1 and C2. The system switcher 21, the automatic phase adjuster 23, and the first to n-th material sources 24-1 to 24-n operate in synchronization.

Process 2: The video switcher 21 uses the reference B
It receives the B signal BB0 and outputs it to the video signal distributor 22.

Process 3: The video signal distributor 22 outputs the reference BB signal BB0 to the automatic phase adjuster 23.

Process 4: The phase detector 51 of the automatic phase adjuster 23 calculates a reference horizontal phase signal, a reference vertical phase signal, and a reference color signal from the horizontal synchronization signal, the vertical synchronization signal, and the color subcarrier signal of the reference BB signal BB0. Generate a phase signal. The generated reference horizontal phase signal, reference vertical phase signal, and reference color phase signal are stored in the reference phase storage unit 52.

Process 5: When the storage of the reference horizontal phase signal, the reference vertical phase signal, and the reference color phase signal is completed, the video switcher 21 selects the first material generation source 24-1. The video switcher 21 outputs the first comparison BB signal BB1 to the video signal distributor 22.

Process 6: The video signal distributor 22 outputs the first comparison BB signal BB1 to the automatic phase adjuster 23.

Process 7: The phase detection section 51 of the automatic phase adjuster 23 compares the horizontal synchronization signal, the vertical synchronization signal and the color subcarrier signal of the first comparison BB signal BB1 with the comparison horizontal phase signal and the comparison vertical phase signal. Generate a color phase signal.
The generated comparison horizontal phase signal, comparison vertical phase signal, and comparison color phase signal are stored in the comparison phase storage unit 52.

Process 8: When the storage of the comparison phase storage unit 53 is completed, the phase comparison unit 54 compares the reference horizontal phase signal stored in the reference phase storage unit 52 with the comparison horizontal phase signal stored in the comparison phase storage unit 53. Compare signals. Phase comparison unit 54
Compares the reference vertical phase signal stored in the reference phase storage unit 52 with the comparison vertical phase signal stored in the comparison phase storage unit 53. The phase comparison unit 54 compares the reference color phase signal stored in the reference phase storage unit 52 with the comparison phase storage unit 53
Are compared with each other. The result of the comparison is output to the phase analysis unit 55 as three difference data.

Process 9: The phase analysis unit 55 analyzes the three difference data, and when detecting a phase shift, generates phase difference data. The phase difference data is output to the phase difference data output unit 56.
Is output to

Process 10: The status fetch unit 58
The selection of the first material generation source 24-1 by the video switcher 21 is detected. The status capturing unit 58 sets the switching signal to the first state. The data switching unit 57 sets the output S2-1 to valid.

Process 11: The phase difference data output unit 56 outputs the phase difference data to the first material source 24-1 via the first output S2-1 of the data switching unit 57.

Process 12: The first material source 24-1 adjusts the phase of the image signal corresponding to the comparison BB signal BB0 based on the phase difference data.

Thereafter, processes 5 to 11 are executed for the second material generation source 24-2 to the n-th material generation source 24-n.
When the processing for the n-th material source 24-n is completed, the reference B
The image signal corresponding to the B signal BB0 and the first to n-th comparison BB
The image signals corresponding to the signals BB1 to BBn are synchronized. If the phases do not match in one process, processes 5 to 11 are repeated.

The phase comparator 54 temporarily stores the comparison horizontal phase signal, the comparison vertical phase signal, and the comparison color phase signal.
In this case, the comparison phase storage unit 5
3 is removed.

The embodiment has been described with reference to the horizontal phase signal, the vertical phase signal, and the color phase signal. The signal to be referred to may be only the horizontal phase signal. The signal to be referred to may be a combination of the horizontal phase signal and the color phase signal.

[0054]

The automatic phase adjusting apparatus according to the present invention can automatically detect a phase shift of an image signal and automatically correct the phase shift. No manual operation to correct the phase shift is required. The time required for correcting the phase shift can be shorter than the time required for manual operation. In the manual operation, a correction error occurs according to the skill of the operator. In the automatic correction, a constant correction accuracy is always obtained.

[Brief description of the drawings]

FIG. 1 shows an image editing system according to the present invention.

FIG. 2 shows an automatic phase adjustment device according to the invention.

FIG. 3 shows a conventional image editing system.

[Explanation of symbols]

 2: Image editing system 20: Synchronous signal generator 21: Video switcher 22: Video signal distributor 23: Automatic phase adjuster 24-1 to 24-n: First to n-th material generation source 51: Phase detector 52: Reference phase storage unit 53: comparison phase storage unit 54: phase comparison unit 55: phase analysis unit 56: phase difference data output unit 57: data switching unit 58: status acquisition unit

Claims (8)

[Claims] A reference phase storage unit configured to store a reference phase signal generated based on a horizontal synchronization signal of a reference video signal; a reference phase signal stored in the reference phase storage unit;
A phase comparison unit that compares a comparison phase signal generated based on a horizontal synchronization signal of a comparison video signal; and a phase analysis unit that generates phase difference data that controls a phase of the comparison video signal based on a result of the comparison. Automatic phase adjuster with 2. The automatic phase adjustment device according to claim 1, wherein the reference phase signal comprises a reference horizontal synchronization phase signal, and the comparison phase signal comprises a comparison horizontal synchronization phase signal. A reference phase storage unit configured to store a reference phase signal generated based on a horizontal synchronization signal and a color synchronization signal of a reference video signal; and the reference phase signal stored in the reference phase storage unit.
A phase comparison unit that compares a comparison phase signal generated based on a horizontal synchronization signal and a color synchronization signal of a comparison video signal; and generates phase difference data that controls a phase of the comparison video signal based on a result of the comparison. Automatic phase adjuster with phase analyzer 4. The automatic phase adjustment device according to claim 3, wherein the reference phase signal comprises a reference horizontal synchronization phase signal and a reference color phase signal, and the comparison phase signal comprises a comparison horizontal synchronization phase signal and a comparison color signal. An automatic phase adjuster consisting of phase signals. 5. A reference phase storage unit that stores a reference phase signal generated based on a horizontal synchronization signal, a vertical synchronization signal, and a color synchronization signal of a reference video signal, and the reference phase stored in the reference phase storage unit. Signals,
A phase comparison unit that compares a comparison phase signal generated based on the horizontal synchronization signal, the vertical synchronization signal, and the color synchronization signal of the comparison video signal; and a phase control unit that controls a phase of the comparison video signal based on the comparison result. An automatic phase adjuster including a phase analyzer for generating phase difference data. 6. The automatic phase adjustment device according to claim 5, wherein the reference phase signal comprises a reference horizontal synchronization phase signal, a reference vertical synchronization phase signal, and a comparison color phase synchronization signal. An automatic phase adjustment device comprising a horizontal synchronization phase signal, a comparison vertical synchronization phase signal, and a comparison color phase synchronization signal. 7. The phase adjustment device according to claim 1, further comprising: a comparison phase storage unit that stores the comparison phase signal, wherein the phase comparison unit stores the comparison phase signal in the reference phase storage unit. An automatic phase adjustment device for comparing the reference phase signal thus obtained with the comparison phase signal stored in the comparison phase storage unit. 8. The automatic phase adjusting device according to claim 1, wherein the reference video signal comprises a reference black burst signal, and wherein the comparison video signal comprises an automatic black burst signal. Phase adjustment device.