JP2001025030A - Digital signal processor, processing method for digital signal and signal processing circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve productivity and to lower a cost by simplifying circuit constitution. SOLUTION: Image data picked up in a CCD 1 are separated into luminance signals Y and UV color difference signals and stored through an A/D converter 2, an image pickup signal processing part 3 and a memory I/F 5 and the stored luminance signals Y and UV color difference signals are inputted to a video system signal processing part 6. Then, a prescribed signal processing is executed in the video signal processing part 6 and the luminance signals Y, composite video signals CV and the UV color difference signals are outputted and respectively converted to analog signals in first - third D/A converters 7-9. Thereafter, while the composite video signals CV are video-outputted to a TV monitor 14, the luminance signals Y and the UV color difference signals are converted to RGB signals in a liquid crystal controller 15 and video-outputted to a liquid crystal panel 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital signal processing apparatus, a digital signal processing method, and a signal processing circuit. More specifically, the present invention relates to a method for transmitting captured video data to a plurality of display devices such as a TV monitor and a liquid crystal panel at the same time. The present invention relates to a digital signal processing device capable of visually displaying, a digital signal processing method, and a signal processing circuit used in the digital signal processing device.

[0002]

2. Description of the Related Art A digital signal processor of this type is conventionally known as shown in FIG. 9 (first prior art).

In the first prior art, an analog video signal received by a CCD 101 is converted into a digital video signal by an A / D converter 102, and then converted into a digital video signal.
In step 3, the signal is converted into a YUV format video signal. And
The converted video signal is supplied to a memory interface (I / F) 104, the video signal is written by a writing circuit 104 a of the memory I / F 104, and the result is stored in a memory 105. The video signal stored in the memory 105 is output to the readout circuit 10 of the memory I / F 104.
4b, and the result is output to the video signal processing unit 10
6 is input. Then, the video signal processing unit 106
The YUV format video signal is separated into a luminance signal Y and a modulated chroma signal C, which is a modulated color difference signal, and these signals are output from the video signal processing unit 106.

After the luminance signal Y is converted into an analog signal by the first D / A converter 107, high-frequency noise components are cut off by a low-pass filter (LPF) and input to the mix circuit 111 and the liquid crystal controller 112. You.

[0005] The modulated chroma signal C is converted into an analog signal by a second D / A converter 109, and then transmitted only through the band frequency of the modulated chroma signal C by a band-pass filter (BPF) to form a mix circuit 111. And input to the liquid crystal controller 112.

Next, in the mix circuit 111, LBP1
The composite video signal (composite video signal) is generated by adding the luminance signal Y from 08 and the modulated chroma signal C from the BPF 110, amplified by the video amplifier 113, and output to the TV monitor 114.

[0007] The liquid crystal controller 112 converts the luminance signal Y and the modulated chroma signal C into RGB signals, generates drive pulses for driving the liquid crystal display elements, and visually displays the input video data on the liquid crystal panel 115.
Reference numeral 130 denotes a crystal oscillator for source oscillation of a subcarrier (color subcarrier). The crystal oscillator 130 generates RGB signals based on the modulated chroma signal C and the luminance signal Y.

As another prior art, a digital signal processing device shown in FIG. 10 is also known (second prior art).

In the second prior art, as in the first prior art, a video signal received by the CCD 101 is transmitted through an A / D converter 102, an imaging signal processing unit 103, a memory I / F 104, and a memory 105 in a YUV format. Are supplied to the video signal processing unit 106.

Next, the video signal processing unit 106
A video signal in YUV format is a luminance signal Y, and a composite video signal C obtained by adding the luminance signal Y and the modulated chroma signal C
V, a BY color difference signal U obtained by removing the luminance signal component from the black signal B, and RY obtained by removing the luminance signal component from the red signal R.
The signals are separated into color difference signals V, respectively, and these signals are output from the video signal processing unit 106.

The luminance signal Y is converted into an analog signal by the first D / A converter 116, and the high-frequency noise component is cut off by the first low-pass filter (LPF) 117. You.

After the composite video signal CV is converted into an analog signal by the second D / A converter 119, a high frequency noise component is converted by the second LPF 120 having the same dynamic characteristics as the first LPF 117. The video signal is shut off and output to the TV monitor 122 via the video amplifier 121.

The BY color difference signal U is supplied to a third D / A converter 1.
After being converted to an analog signal by the second LPF 12, the third LPF 12
The high frequency noise component is cut off at 3 and the liquid crystal controller 11
8 is input.

The RY color difference signal V is supplied to a fourth D / A converter 1
After being converted to an analog signal at 24, the fourth LPF 12
The high frequency noise component is cut off at 5 and the liquid crystal controller 11
8 is input.

The liquid crystal controller 118 generates an RGB signal based on the luminance signal Y, the BY color difference signal U, and the RY color difference signal V, generates a driving pulse for driving the liquid crystal display element, and captures an image. LCD panel data
7 is visually displayed.

[0016]

However, in the case of the first prior art, a crystal oscillator 130 for source oscillation of a subcarrier for generating an RGB signal from the modulated chroma signal C is required, and the number of parts of the device is reduced. In addition, when manufacturing a digital signal device corresponding to a plurality of different video signal systems, it is necessary to make a circuit configuration different according to the video signal system.

That is, as a video signal system of a color television, as is well known, NTSC (National Television System Committ) adopted in Japan and the United States.
ee) method and PAL (Phase Alter) adopted in Europe, etc.
nation by Line color television), but the carrier frequency of the subcarrier is about 3.5 in the case of NTSC.
8 MHz and about 4.43 MHz in the case of the PAL system.

Therefore, the same crystal oscillator cannot be used in the case where the video signal system is the NTSC system and the case where the video signal system is the PAL system. Therefore, it is necessary to make the circuit configuration different, and the number of parts increases. In addition, there is a problem that production efficiency (mass productivity) is poor.

In the second embodiment, the luminance signal Y, the BY color difference signal U, and the RY color difference signal V
Since the signal is converted into a B signal, a crystal oscillator for subcarrier source oscillation is not required, and the number of parts can be reduced from this point, and the liquid crystal controller 118 has the same configuration regardless of the video system. Therefore, as compared with the first conventional technique, mass productivity is excellent, and high image quality can be achieved.

However, in the second prior art, as described above, since the RGB signals are generated based on the luminance signal Y, the BY color difference signal U and the RY color difference signal V, the video signal processing section The composite video signal CV is output from the digital signal 106 to output four types of signals. Therefore, four D / A converters (first to fourth D / A converters) are used to convert a digital signal into an analog signal. A converter 11
6, 119, 123, 125). Therefore, in the second prior art, the first to fourth D / A converters 11
Circuit configuration including 6, 119, 123, 125
When a C (Application Specific Integrated Circuit) is used, there is a problem that the circuit scale is increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a digital signal processing apparatus and a digital signal processing method capable of improving productivity and reducing costs with a simple circuit configuration. And a signal processing circuit.

[0022]

In order to achieve the above object, a digital signal processing apparatus according to the present invention separates digital image data picked up by an image pickup means into a luminance signal and a dot-sequential color difference signal and stores them. Storage means, signal processing means for performing predetermined signal processing on the luminance signal and dot-sequential color difference signal stored in the storage means, and a plurality of means for converting digital image data signal-processed by the signal processing means into analog image data And a digital signal processing device comprising at least one or more display means for visually displaying the analog image data converted by the conversion means.
The signal processing means has color difference signal output means for outputting the dot sequential color difference signal while maintaining the signal format of the dot sequential color difference signal, and the dot sequential color difference signal output by the color difference signal output means is: The signal is converted into an analog dot-sequential color difference signal by one of the plurality of conversion means.

Also, in the digital signal processing method according to the present invention, the digital image data picked up by the image pickup means is separated into a luminance signal and a dot-sequential chrominance signal, and stored. Performing predetermined signal processing on the signal, converting the digital image data subjected to the signal processing into analog image data using a plurality of conversion means, and converting the converted analog image data into at least one or more display means In the method of processing a digital signal to be displayed in a visible manner, the dot-sequential color difference signal is input to one of the plurality of conversion means while maintaining the signal format of the dot-sequential color difference signal. It is characterized in that a digital dot-sequential signal is converted into an analog dot-sequential color difference signal.

Further, the signal processing circuit according to the present invention performs a predetermined signal processing on the input luminance signal to generate and output a corrected luminance signal, and modulates the input dot-sequential color difference signal. A color signal generating means for generating a color signal; a composite video signal generating means for generating a composite video signal based on the color signal and the luminance signal; Conversion means for converting to a low rate, first switching means for switching between an output signal from the color signal generation means and an output signal from the composite video signal generation means, and an output from the color signal generation means A second switch for switching the output between the signal and the output signal from the conversion means;
And switching means.

Other features of the present invention will be apparent from the following description of embodiments of the invention.

[0026]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a digital signal processing apparatus according to the present invention. The digital signal processing apparatus is an image pickup device for converting an optical image into an electric signal (video signal). CCD 1, an A / D converter 2 that converts an analog video signal output from the CCD 1 into a digital video signal, and performs predetermined signal processing on an output signal from the A / D converter 2 to perform YUV format conversion. An imaging signal processing unit 3 for creating a video signal, and a VRA for storing the video signal
A memory I / F 5 having a memory 4 composed of M, a write circuit 5a for writing video signals to the memory 4, and a read circuit 5b for reading video signals from the memory 4.
A video signal processing unit 6 that performs predetermined video processing on a video signal output from the memory I / F 5 to perform a separation process into a luminance signal Y, a modulated chroma signal C, and a UV color difference signal;
First to third D / A converters 7 to 9 for converting a digital signal output from video signal processing unit 6 into an analog signal
And first and second blocks for blocking high-frequency noise components of video signals output from the first and second D / A converters 7 and 8.
LPFs 10 and 11 and a synchronizing circuit 12 that performs predetermined synchronizing processing on the video signal output from the third D / A converter 9 to separate it into a BY color difference signal U and an RY color difference signal V.
A video amplifier 13 for amplifying a video signal output from the second LPF 11, a TV monitor 14 for visually displaying the video signal output from the video amplifier 13, a first D / A converter 10, Liquid crystal controller 1 that generates RGB signals based on output signals from conversion circuit 12
5 and a liquid crystal panel 16 for visually displaying the RGB signals output from the liquid crystal controller 15.

As shown in FIG. 2, the video signal processing circuit 6 corrects the high-frequency characteristic of the luminance signal Y and converts it into a high-resolution luminance signal Y.
And a first adder 18 that adds the output signal from the aperture correction circuit 17 and a synchronization signal (SYNC) to output a desired luminance signal Y, and a predetermined frequency (for example, 7 MHz) for the luminance signal Y. A third LPF 19 that removes the above-described high-frequency band noise components, a second adder 20 that adds the output signal from the third LPF 19 and a synchronization signal to output a luminance signal Y, and BY The color difference signal U and the RY color difference signal V are separated and the BY color difference signals U and R-
A color difference signal synchronizing circuit 21 that outputs the Y color difference signals V in time alignment and modulates a BY color difference signal U and an RY color difference signal V output from the color difference signal synchronizing circuit 21. And a third adder 23 for adding the luminance signal Y from the second adder 20 and the chroma encode circuit 22 to output a composite video signal CV. , A rate conversion circuit 24 for converting the input sampling rate (dot sequential rate) of the UV color difference signal to １ ／, a composite video signal CV from the second adder 23 and a modulated chroma signal from the chroma encoding circuit 22 C, and a first selector 25 for selecting and outputting one of the composite video signal CV and the modulated chroma signal C.
And the modulated chroma signal C from the chroma encode circuit 22
And a second selector 26 to which a UV color difference signal from the rate conversion circuit 24 is input and selects and outputs one of the modulated chroma signal C and the UV color difference signal.

The synchronizing circuit 12 to which the output signal from the third D / A converter 9 is input, as shown in FIG.
A first buffer 27 that drives the UV color difference signal with low impedance, a first sample switch 28 that turns on in synchronization with the input of a first sample and hold (first SH) signal, and a second sample and hold (Second SH) Second sample switch 29 that turns on in synchronization with the input of the signal
When the first sample switch 28 and the second sample switch 29 are on,
A first capacitor 30 and a second capacitor 31 that are released and retain their charge when they are off, respectively;
Second and third buffers 32, 3 for driving output signals from the first and second sampling switches 28, 29, respectively.
3, and fourth and fifth buffers for removing high-frequency noise components of output signals output from the second and third buffers 32 and 33.
In the present embodiment, the BY color difference signal U is output from the fourth LPF 34 to the fifth LPF 35 in this embodiment.
Output the RY color difference signals V.

In the digital signal processing device configured as described above, in FIG. 1, a video signal received by the CCD 1 and photoelectrically converted is supplied to the imaging signal processing unit 3. The imaging signal processing unit 3 performs a color carrier removal, an aperture correction, a gamma correction, and the like from the input video signal to generate a luminance signal Y, and further performs color interpolation, predetermined matrix conversion, gamma correction, gain adjustment, and the like. To generate a UV color difference signal as a dot-sequential color difference signal, and output a YUV format video signal.

Next, the thus produced YUV
The format video signals are sequentially sent to the memory I / F 5. Specifically, as shown in FIG. 4, a luminance signal Y and the upper data, the UV color difference signals as lower data _{Y 0 U 0 Y 1 V O} Y
Video signals are sequentially supplied to the memory I / F 5 in the order of ₂ U ₂ Y ₃ V ₂ . Next, the video signal is input to the memory 4 via the writing circuit 5a of the memory I / F 5, and is sequentially stored on memory addresses continuous for each horizontal line.

The video signal thus stored in the memory 4 is read out for each horizontal line according to the address pointer and the data size, and output to the video signal processing section 6 via the readout circuit 5b of the memory I / F 5. Is done.

As shown in FIG. 2, the luminance signal Y input to the video signal processing unit 6 is corrected for the high-frequency side characteristic by the aperture correction circuit 17, and the synchronization signal is output by the first adder 18. And is output to the first D / A converter 7.

The input luminance signal Y is added to a modulation chroma signal C to be described later and the LPF 19 suppresses the high frequency side which is the band frequency of the modulation chroma signal C. At 20, the sum is added to the synchronization signal and input to the third adder 23.

On the other hand, the UV color difference signal is separated into a BY color difference signal U and an RY color difference signal V by a color difference signal synchronizing circuit 21, and a BY color difference signal U and an R-Y 2. sampling the Y color difference signal V at 14 MHz (four times the frequency of the color subcarrier signal);
58MHz (in case of NTSC system) or 4.43MH
The signal is converted into a modulated chroma signal C of z (in the case of the PAL system), and is input to the third adder 23 and the first selector 25. That is, a UV color difference signal, which is a dot-sequential color difference signal, is sampled at each clock and the BY color difference signals U and R are sampled.
-Y color difference signal V and the BY color difference signal U and RY
The sampling rate with the color difference signal V is synchronized. That is, since the sampling rate of the UV chrominance signal is の of the sampling rate of the luminance signal Y, the sampling rate of the UV chrominance signal is required to generate the modulated chroma signal C in synchronization with the sampling rate of the luminance signal Y. It is necessary to synchronize with the sampling rate of the luminance signal Y. Therefore, the color difference signal synchronizing circuit 21 performs interpolation for each pixel.

The third adder 23 adds the luminance signal Y from the second adder 20 and the modulated chroma signal C from the chroma encoding circuit 22 to generate a color composite signal CV. The composite signal CV is input to the first selector 25. And the first
Is capable of outputting one of the color composite signal CV and the modulated chroma signal C. In the present embodiment, the color composite signal CV
V is output to the second D / A converter 8.

When the output of the second D / A converter 8 can be input to the S terminal (Y / C separate terminal) as in a second embodiment described later, the first The selector 25 is switched and set so that the modulated chroma signal C from the chroma encoding circuit 22 is output. That is, the video signal processing unit 6 of the present embodiment is configured to be sharable even when the digital signal processing device has the S terminal.

The UV color difference signal is input to a rate conversion circuit 24, which converts the rate of the UV color difference signal to half the input rate. That is, as shown in FIG. 5A, the luminance signal Y is sequentially input in the order of Y ₀ Y ₁ Y ₂ ..., While the UV color difference signal is inputted as shown in FIG.
.. Are sequentially input in the order of U ₀ V ₀ U ₂ V ₂ ..., But the rate conversion circuit 24 converts the rate of the output UV color difference signal to half of the input UV color difference signal, as shown in FIG. And U ₀
U ₀ V ₀ V ₀ ... Are sequentially output.

Then, the modulated chroma signal C from the chroma encoding circuit 22 and the UV color difference signal from the rate conversion circuit 24 are input to a second selector 26, which outputs the modulated chroma signal C or the UV color difference signal. In this embodiment, a UV color difference signal is output to the third D / A converter 9.

Incidentally, as in a third embodiment described later,
When the output of the third D / A converter 9 can be input to the S terminal, the second selector 26 is switched and set so that the modulated chroma signal C from the chroma encoding circuit 22 is output. . That is, the video signal processing unit 6 of the present embodiment is configured to be sharable even when the digital signal processing device has the S terminal.

As described above, in this embodiment, the luminance signal Y from the first adder 18 is input to the first D / A converter 7 and the composite video signal CV from the first selector 25 is output. Is input to the second D / A converter 8, and the third
The UV color difference signal from the selector 26 is input to the third D / A converter 9.

Then, the luminance signal Y converted into an analog signal by the first D / A converter 7 is input to the liquid crystal controller 15 after the high frequency band signal is cut off by the first LPF 10.

Further, the color composite signal CV converted into an analog signal by the second D / A converter 8
The high frequency band signal is cut off by the LPF 11, and a video signal corresponding to the video system such as the NTSC system or the PAL system is visually displayed on the TV monitor 14 via the video amplifier 13.

The UV color difference signal converted into an analog signal by the third D / A converter 9 is input to the synchronizing circuit 12, where the BY color difference signal U and the RY color difference signal are inputted. The signal is separated into a signal V and input to the liquid crystal controller 15.

That is, in FIG. 3, the UV color difference signal is input to the first and second sample switches 28 and 29 via the first buffer 27. When the first SH is supplied to the first sample switch 28 for a predetermined time, the first sample switch 28 is turned on, and when the second SH is supplied to the second sample switch 29 for a predetermined time. The second sample switch 29 is turned on, and as shown in FIG. 6, the first sample switch 28 and the second sample switch 29 are alternately turned on and off, so that the liquid crystal controller 15 Is the BY color difference signal U
And RY color difference signals V are sequentially and alternately input.

In the liquid crystal controller 15, the luminance signal Y from the first LPF 10 and the luminance signal Y from the
RGB based on the Y color difference signal U and the RY color difference signal V
A signal is generated and displayed on the liquid crystal panel 16.

As described above, in the present embodiment, the modulated chroma signal C corresponding to the color sub-carrier frequency of the video system is generated by the chroma encoding circuit 22, and is output from the second D / A converter 25. The color composite signal CV also complies with the video system, so that the circuit can be shared and the productivity can be improved.

Further, the UV color difference signal is
The video signal processor 6 separates the BY color difference signal U and the RY color difference signal U into the Y color difference signal U and the RY color difference signal V.
There is no need to separate the color difference signal V from the color difference signal V, so that D / A
The number of converters can be reduced, and the cost of the device can be reduced.

FIG. 7 is a block diagram showing a second embodiment of the digital signal generating apparatus according to the present invention. In the second embodiment, the output of the second D / A converter 8 is shown. Is connected to an S terminal output amplifier 37 and an S terminal compatible TV monitor 38 at the output side of the BPF 36. The S terminal output amplifier 37 separates the luminance signal Y and the modulated chroma signal C without mixing them. Is being entered.

That is, in the second embodiment, the UV selector outputs a UV color difference signal from the second selector 26 of the video signal processing unit 6 in the same manner as the first embodiment. A modulated chroma signal C is output from the selector 25,
A predetermined color sub-carrier frequency (NTSC system:
(3.58 MHz, PAL: 4.43 MHz), a video signal of a predetermined band frequency is transmitted, and then the luminance signal Y and the modulated chroma signal C are individually impedance-matched by the S terminal output amplifier 37, and then the S terminal is supported. The video signal is visually displayed on the TV monitor 38.

As described above, since the S terminal output amplifier 37 is used in the present embodiment, a high-resolution TV image can be displayed in addition to the first embodiment.

FIG. 8 is a block diagram showing a third embodiment of the digital signal generating apparatus according to the present invention. In the third embodiment, the third D / A converter 9 and the S / S A BPF 39 is interposed between the terminal output amplifier 37.

In the third embodiment, the color composite signal CV is output from the first selector 25 of the video signal processing unit 6 in the same manner as in the first embodiment. 2 selector 26 outputs a modulated chroma signal C corresponding to the video signal system, and a color subcarrier frequency (NTSC system: 3.58 MHz, PA
L: 4.43 MHz) through which a video signal of a predetermined band frequency is transmitted, and then the luminance signal Y and the modulated chroma signal C are individually impedance-matched by the S terminal output amplifier 37 and then transmitted to the S terminal compatible TV monitor 38. The video signal is displayed visually.

As described above, in the present embodiment, the same effects as those of the first embodiment can be obtained, and an image display using the color composite signal CV and a high-resolution image display corresponding to the S terminal can be simultaneously performed. .

[0055]

As described in detail above, according to the digital signal processing apparatus and the digital signal processing method of the present invention, the NTS
It is possible to visually display desired image data on display means with the same circuit configuration regardless of the video signal system such as the C system or the PAL system, and to convert digital image data into analog image data. Since the number of conversion means can be reduced as compared with the conventional one, the circuit scale can be simplified, so that the mass productivity can be improved and the cost can be reduced. At the same time, it is possible to effectively cope with a digital signal device capable of visually displaying.

According to the signal processing circuit of the present invention, the display means is a combination of a TV monitor and a liquid crystal panel, a combination of an S terminal compatible TV monitor and a liquid crystal panel, or an S terminal compatible TV monitor and a normal TV monitor. The simultaneous visual display of the video signal can be easily performed on a plurality of display means composed of various combinations such as a combination of the above.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a digital signal processing device according to the present invention.

FIG. 2 is a block circuit diagram showing details of a video signal processing unit.

FIG. 3 is a block circuit diagram showing details of a synchronization circuit;

FIG. 4 is a data structure diagram of a YUV format video signal output from an imaging signal processing unit.

FIG. 5 is a data structure diagram showing a data structure of a UV color difference signal output from a rate conversion circuit together with a luminance signal Y;

FIG. 6 is a timing chart showing a hold timing of a sample hold performed by the synchronization circuit.

FIG. 7 is a block diagram showing a digital signal processing apparatus according to a second embodiment of the present invention.

FIG. 8 is a block diagram showing a digital signal processing apparatus according to a third embodiment of the present invention.

FIG. 9 is a block diagram of a first conventional technique of a digital signal processing device.

FIG. 10 is a block diagram of a first conventional technique of a digital signal processing device.

[Explanation of symbols]

 Reference Signs List 4 memory (storage means) 6 video system signal processing section (signal processing means) 7-9 first to third D / A converter (conversion means) 14 TV monitor (display means) 16 liquid crystal panel (display means) 38 S terminal compatible TV monitor (display means)

Claims (13)

[Claims] 1. A storage means for separating digital image data captured by an imaging means into a luminance signal and a dot-sequential color difference signal and storing the same, and a predetermined luminance signal and a dot-sequential color difference signal stored in the storage means. Signal processing means for performing signal processing;
A plurality of conversion means for converting digital image data signal-processed by the signal processing means into analog image data;
A digital signal processing device comprising at least one or more display means for visually displaying the analog image data converted by the conversion means, wherein the signal processing means maintains a signal format of the dot-sequential color difference signal. A color difference signal output unit that outputs the dot-sequential color difference signal, wherein the dot-sequential color difference signal output by the color difference signal output unit is an analog dot-sequential color difference signal by one of the plurality of conversion units. A digital signal processing device characterized by being converted into a digital signal. 2. The signal processing unit includes a luminance signal output unit that outputs a luminance signal on which a predetermined signal processing has been performed, and the luminance signal output by the luminance signal output unit is used by the plurality of conversion units. And a display data generating means for generating display data based on the analog luminance signal and the analog dot-sequential color difference signal. 2. The digital signal processing device according to claim 1, wherein the display data generated by the means is visually displayed on the display means. 3. The composite video signal output unit for outputting a composite video signal generated based on the luminance signal and the dot-sequential color difference signal, wherein the signal processing unit is output by the composite video signal output unit. 3. The digital signal processing apparatus according to claim 2, wherein the composite video signal is visually displayed on display means other than the display means for displaying the display data generated by the display data generation means. 4. The color signal output means for modulating the dot-sequential color difference signal to generate a color signal and outputting the color signal, wherein the color signal output by the color signal output means is provided. Is converted into an analog color signal by one of the plurality of conversion means, and a separated signal separated into the analog luminance signal and the analog color signal is generated by the display data generation means. 3. The digital signal processing apparatus according to claim 2, wherein the display data is displayed on another display means other than the display means for displaying the display data. 5. The color-difference signal output means outputs the dot-sequential color-difference signal by the color-difference signal output means by converting a dot-sequentialization rate of the dot-sequential color-difference signal to a predetermined low rate. The digital signal processing device according to claim 1. 6. A storage means for separating digital image data captured by the imaging means into a luminance signal and a dot-sequential color difference signal and storing the separated digital image data, and applying a predetermined signal to the luminance signal and the dot-sequential color difference signal stored in the storage means. Signal processing means for performing signal processing to output digital image data, a plurality of conversion means for converting digital image data signal-processed by the signal processing means into analog image data, and analog image data converted by the conversion means A digital signal processing device comprising: a plurality of display means for visually displaying a signal; wherein the signal processing means outputs a luminance signal subjected to predetermined signal processing, and modulates the dot-sequential color difference signal. A color signal output unit for generating a color signal and outputting the color signal; and generating a composite video signal based on the luminance signal and the dot-sequential color difference signal. A composite video signal output means for outputting a composite video signal, a luminance signal output from the luminance signal output means, a color signal output from the color signal output means, and a composite video output from the composite video signal output means. The signals are converted into analog luminance signals, color signals, and composite video signals by the plurality of conversion means, respectively, and the separated signals separated into the analog luminance signals and the analog color signals are visible on one display means. A digital signal processing apparatus, wherein the composite video signal is displayed on another display means other than the one display means simultaneously with the display. 7. The digital image data picked up by the image pickup means is separated into a luminance signal and a dot-sequential color difference signal and stored, and the stored luminance signal and dot-sequential color difference signal are subjected to predetermined signal processing. The processed digital image data is converted into analog image data using a plurality of conversion means, and the converted analog image data is converted into at least one analog image data.
A method of processing a digital signal to be displayed on one or more display means, wherein the point-sequential color difference signal is input to one of the plurality of conversion means while maintaining the signal format of the dot-sequential color difference signal. A digital point-sequential signal is converted into an analog point-sequential color difference signal by the conversion means. 8. A predetermined signal processing is performed on the stored luminance signal to convert the stored luminance signal into an analog luminance signal by one of the plurality of conversion means. Then, the analog luminance signal and the analog luminance signal are converted. 8. The digital signal processing method according to claim 7, wherein display data is generated based on the dot-sequential color difference signal, and the generated display data is visually displayed on the display unit. 9. A composite video signal is generated based on the stored luminance signal and the dot-sequential color difference signal, and converted into an analog composite video signal by one of the plurality of conversion units. 9. The digital signal processing method according to claim 8, wherein the converted composite video signal is visually displayed on a display other than the display on which the display data is displayed. 10. A color signal is generated by modulating the stored dot-sequential color difference signal, and the generated color signal is converted into an analog color signal by one of the plurality of conversion means. 9. The digital signal processing method according to claim 8, wherein the converted color signal is visually displayed on a display other than the display on which the display data is displayed. 11. The dot sequential color difference signal stored in the stored dot sequential color difference signal is converted to a predetermined low rate, and the dot sequential color difference signal is supplied to the conversion unit. The method for processing a digital signal according to any one of claims 10 to 13. 12. A digital image obtained by separating digital image data imaged by an image pickup means into a luminance signal and a dot-sequential color difference signal and subjecting the stored luminance signal and dot-sequential color difference signal to predetermined signal processing. Output the data, then
In a digital signal processing method of converting the digital image data into analog image data using a plurality of conversion means and visually displaying the converted analog image data on a plurality of display means, a predetermined signal processing is performed. Output the luminance signal
The point-sequential color difference signal is modulated to generate a color signal and output the color signal, and further, a composite video signal is generated based on the stored luminance signal and the dot-sequential color difference signal to generate the composite video signal. Outputting the output luminance signal, color signal and composite video signal,
At the same time, the plurality of conversion units convert the analog luminance signal, the color signal, and the composite video signal into an analog luminance signal, a color signal, and a composite video signal, respectively. A digital signal processing method for visually displaying the composite video signal on another display means other than the one display means. 13. A luminance signal output means for performing predetermined signal processing on an input luminance signal to generate and output a corrected luminance signal, and a color signal for modulating an input point-sequential color difference signal to generate a color signal. Generating means, a composite video signal generating means for generating a composite video signal based on the color signal and the luminance signal, and a conversion means for converting the dot sequential rate of the dot sequential color difference signal to a predetermined low rate, First switching means for performing output switching between an output signal from the color signal generation means and an output signal from the composite video signal generation means, an output signal from the color signal generation means, and an output signal from the conversion means And a second switching means for switching the output of the signal processing circuit.