JPH05304682A - Signal processor and video recording device using the same - Google Patents

Abstract

PURPOSE:To decrease the cost by eliminating excess parts in constructing a camcorder with dissimilar formats. CONSTITUTION:In the camera mode, image pickup signals from a color image pickup element 21 are supplied through a switch 1 to processing circuits 23 and 24 for processing IC 2. From the processing IC2, luminance signals Y1 from the processing circuits 23 and 24 and color difference signals C1 are outputted through switches 26 and 27. In the line input mode, color video signals from an input terminal 28 is supplied through the switch 1 to a YC separator 29. From the processing IC2, luminance signals Y2 and chrominance signals C2 from the YC separator 29 are outputted through the switches 26 and 27. The recording processing of the luminance signals Y and color difference signals C outputted from the processing IC2 is performed by a VTR processing IC3 to be recorded on a tape 36. The processing IC2 has a processing circuit converting color image pickup signals and video signals into the standard luminance signals and color signals, which can be commonly used for camcorders with dissimilar formats.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal processing apparatus suitable for application to, for example, a camera-integrated VTR and a video recording apparatus using the signal processing apparatus.

[0002]

2. Description of the Related Art In a conventional camera-integrated VTR,
The signal processing IC system was divided into a camera IC and a video IC.

For example, FIG. 4 shows a camera integrated type 8 mm VTR.
The example of composition of is shown. The reproduction system is omitted for simplification of the drawing. The same applies to each of the following examples.

Reference numeral 21 is a color CCD solid-state image pickup device,
The image pickup signal output from the image pickup device 21 is a camera IC.
It is supplied to a luminance signal processing circuit 23 and a color signal processing circuit 24 which form 22. The luminance signal Y1 and the color difference signal C1 output from the signal processing circuits 23 and 24 are video I
It is supplied to the fixed terminals on the a side of the changeover switches 26 and 27 which constitute C25.

Further, 28 is a line input terminal, and the color image signal inputted to this input terminal 28 is a video IC.
25 to the YC separation circuit 29. The luminance signal Y2 and the color difference signal C2 separated by the YC separation circuit 29 are supplied to fixed terminals on the b side of the changeover switches 26 and 27, respectively. The changeover switches 26 and 27 are connected to the a side in the camera mode and to the b side in the line input mode based on a mode signal (not shown).

The luminance signal Y output from the change-over switch 26 is emphasized in the high frequency range by the emphasis circuit 30 and then FM.
The modulation circuit 31 performs FM modulation. This FM modulation circuit 31
The FM luminance signal YFM output by the above is supplied to the adder 33. Further, the color difference signal C output from the changeover switch 27 is supplied to the color low frequency conversion circuit 32, and the conversion circuit 32 forms the low frequency conversion carrier color signal CL from the color difference signal C. Then, the low-frequency conversion carrier color signal CL output from the conversion circuit 32 is supplied to the adder 33.

In the adder 33, the FM luminance signal YFM and the low frequency conversion carrier color signal CL are combined to form a recorded video signal. The recording video signal output from the adder 33 is amplified by the recording amplifier 34 and then supplied to the magnetic head 35 and recorded on the magnetic tape 36.

In this case, in the camera mode, the changeover switches 26 and 27 are connected to the side a, so that the camera IC
The recording video signals related to the luminance signal Y1 and the color difference signal C1 output from the signal processing circuits 23 and 24 of the magnetic tape 36 are the magnetic tape 36.
Recorded in. On the other hand, in the line input mode, since the changeover switches 26 and 27 are connected to the b side, the video I
Luminance signal Y output from YC separation circuit 29 of C25
2. The recording video signal related to the color difference signal C2 is recorded on the magnetic tape 36.

By the way, FIG. 5 shows an example in which a camera-integrated digital VTR is constructed by using the camera IC 22 and the video IC 25 in the example of FIG. 5, parts corresponding to those in FIG. 4 are designated by the same reference numerals, and detailed description thereof will be omitted.

In the figure, the luminance signal Y and the color difference signal C output from the changeover switches 26 and 27 of the video IC 25 are shown.
Is supplied to the baseband coding circuit 38 of the digital VTR processing IC 37 which is integrated into an IC, and is subjected to processing such as data compression. The output data of the coding circuit 38 is supplied to the error correction circuit 39 and added with error correction parity. The output data of the error correction circuit 39 is the channel coding circuit 40.
And is converted into a code suitable for a magnetic recording / reproducing system.

The recording video signal output from the coding circuit 40 of the digital VTR processing IC 37 is amplified by the recording amplifier 34 and then supplied to the magnetic head 35 and recorded on the magnetic tape 36.

In this case, in the camera mode, since the changeover switches 26 and 27 are connected to the side a, the camera IC
The recording video signals related to the luminance signal Y1 and the color difference signal C1 output from the signal processing circuits 23 and 24 of the magnetic tape 36 are the magnetic tape 36.
Recorded in. On the other hand, in the line input mode, since the changeover switches 26 and 27 are connected to the b side, the video I
Luminance signal Y output from YC separation circuit 29 of C25
2. The recording video signal related to the color difference signal C2 is recorded on the magnetic tape 36.

[0013]

In the example of FIG. 5,
Although the emphasis circuit 30, the FM modulation circuit 31, and the color low-frequency conversion circuit 32 of the video IC 25 are unnecessary,
Since it cannot be omitted because it is integrated into an IC together with the YC separation circuit 29 and the changeover switches 26 and 27, there is a disadvantage that the cost becomes high.

In view of the above, the present invention has an object to reduce the cost by eliminating unnecessary parts when, for example, a camera-integrated VTR having a different format is constructed.

[0015]

According to a first aspect of the present invention, there is provided a signal processing apparatus comprising: a first input terminal to which an image pickup signal output from a color image pickup element is supplied; and a color video signal to a first input terminal. 2 input terminals, a first signal processing circuit for obtaining a luminance signal and a chrominance signal from the image pickup signal supplied to the first input terminal, and a luminance signal and a chrominance signal for the video signal supplied to the second input terminal And a switching circuit for switching the signals obtained from the first and second signal processing circuits, and each circuit is integrated into an IC.

A signal processing device according to a second aspect of the present invention is the signal processing device according to the first aspect, wherein delay elements are used in the first and second signal processing circuits and the delay elements are used in the first and second signal processing circuits. It also serves as a delay element.

A video recording apparatus according to a third aspect of the present invention includes a signal processing apparatus according to the first aspect, and a recording processing apparatus for forming a recording video signal from a luminance signal and a chrominance signal output from the signal processing apparatus. It is equipped with.

[0018]

According to the present invention, there is provided a first processing circuit (camera processing circuit) for processing an image pickup signal outputted from a color image pickup device to obtain a luminance signal and a color signal, and a luminance signal rather than a color image signal. And a second processing circuit (YC separation circuit) for separating the color signals. That is, it has a processing circuit for converting an image pickup signal output from the color image pickup device and a color video signal into standard luminance signals and color signals. Therefore, when the camera-integrated VTRs having different formats are configured, they can be commonly used without waste, and the cost can be reduced.

According to the second aspect of the invention, the delay circuit used in the first and second signal processing circuits is also used. Since the delay circuit is also used, the cost can be further reduced.

According to another aspect of the present invention, there is provided a signal processing device for converting an image pickup signal outputted from a color image pickup device and a color video signal into standard luminance signals and color signals, and the luminance signal and the color signal. The ICs are divided into recording processing devices that form recording video signals. Therefore, when configuring a camera-integrated VTR having a different format, only the recording processing device needs to be developed corresponding to each format, which can shorten the product development period and significantly reduce the risk.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. This example is a camera integrated type 8mm VT
This is an example applied to R. In FIG. 1, parts corresponding to those in FIG. 4 are shown with the same reference numerals.

In the figure, a color CCD solid-state image pickup device 2
The image pickup signal output from 1 is supplied to the fixed terminal on the side a of the changeover switch 1. The color video signal input to the line input terminal 28 is supplied to the fixed terminal on the b side of the changeover switch 1. The changeover switch 1 is connected to the a side in the camera mode and to the b side in the line input mode based on a mode signal (not shown).

The output signal of the changeover switch 1 is a signal processing IC.
2, a luminance signal processing circuit 23 and a color signal processing circuit 2
4 and YC separation circuit 29. The luminance signal Y1 and the color difference signal C1 output from the signal processing circuits 23 and 24, respectively, are supplied to the fixed terminals on the a side of the changeover switches 26 and 27. Luminance signal Y separated by the YC separation circuit 29
2. The color difference signal C2 is output from the changeover switches 26 and 27b, respectively.
Side fixed terminal. Changeover switch 26, 27
Also, based on a mode signal (not shown), it is connected to the a side in the camera mode and to the b side in the line input mode.

FIG. 2 shows a specific structure of a part of the signal processing IC 2. This is an example when a color CCD solid-state image pickup device 21 having a complementary color checker system color filter is used.

In the figure, 101 and 102 are delay circuits having a delay time of one horizontal period, 103 is an adder, and 104.
˜106 are bandpass filters, 107˜109 are subtractors, and 110 is a changeover switch.

Delay circuits 101 and 102 and adder 10
3 constitutes a part of the signal processing circuits 23 and 24.
The output signals of the adder 103 and the delay circuit 101 are further processed by another part (not shown) to obtain a luminance signal Y1.
And a color difference signal C1 is formed.

The delay circuits 101 and 102, the bandpass filters 104 to 106, the subtractors 107 to 109 and the changeover switch 110 form a YC separation circuit 29. The changeover switch 110 is changed over according to the degree of vertical correlation, and constitutes a so-called logical comb filter.

Returning to FIG. 1, the luminance signal Y output from the changeover switch 26 of the signal processing IC 2 has its high frequency band emphasized by the emphasis circuit 30 of the 8 mm VTR processing IC 3,
FM modulation is performed by the FM modulation circuit 31. The FM luminance signal YFM output from the FM modulation circuit 31 is added by the adder 3
3 is supplied. The color difference signal C output from the changeover switch 27 of the signal processing IC 2 is supplied to the color low frequency conversion circuit 32 of the 8 mm VTR processing IC 3, and the conversion circuit 32 forms the low frequency conversion carrier color signal CL from the color difference signal C. Then, the low-frequency conversion carrier color signal CL output from the conversion circuit 32 is supplied to the adder 33.

In the adder 33, the FM luminance signal YFM and the low frequency conversion carrier color signal CL are combined to form a recording video signal. The recording video signal output from the adder 33 is amplified by the recording amplifier 34 and then supplied to the magnetic head 35 and recorded on the magnetic tape 36.

In the camera mode, the changeover switch 1,
Since 26 and 27 are connected to the a side, the image pickup signal output from the image pickup device 21 is transmitted from the changeover switch 1 to the signal processing IC.
2 is supplied to the signal processing circuit 23, 2 from the image pickup signal.
The luminance signal Y1 and the color difference signal C1 formed by
A luminance signal Y and a color difference signal C are output from C2, and a recording video signal related to these signals is recorded on the magnetic tape 36.

On the other hand, in the line input mode, since the changeover switches 1, 26 and 27 are connected to the side b, the color video signal inputted to the line input terminal 28 is supplied from the changeover switch 1 to the signal processing IC 2. A luminance signal Y2 and a color difference signal C2 separated from the color video signal by the YC separation circuit 29 are output as a luminance signal Y and a color difference signal C from the signal processing IC2, and a recording video signal related to these signals is recorded on the magnetic tape 36. To be done.

Next, another embodiment of the present invention will be described with reference to FIG. This example is an example applied to a camera-integrated digital VTR. 3, parts corresponding to those in FIGS. 1 and 5 are designated by the same reference numerals, and detailed description thereof will be omitted.

In the figure, the luminance signal Y and the color difference signal C output from the changeover switches 26 and 27 of the signal processing IC 2 are supplied to the base band coding circuit 38 of the digital VTR processing IC 4, respectively. Other configurations are the same as those in the examples of FIGS. 1 and 5.

Also in this example, as in the example of FIG. 1, in the camera mode, the luminance signal Y formed by the signal processing circuits 23 and 24 from the image pickup signal output from the image pickup device 21.
1. The color difference signal C1 is output from the signal processing IC 2, and the recording video signal related to this signal is recorded on the magnetic tape 36.
On the other hand, in the line input mode, the line input terminal 28
A luminance signal Y2 and a color difference signal C2 separated by a YC separation circuit 29 from the color video signal input to the are output from the signal processing IC 2, and a recording video signal related to these signals is recorded on the magnetic tape 36.

As described above, the signal processing IC 2 in the examples of FIGS. 1 and 3 includes the signal processing circuits 23 and 24 for forming the luminance signal Y1 and the color difference signal C1 from the image pickup signal output from the image pickup device 21, A YC separation circuit 29 for separating the luminance signal Y2 and the color difference signal C2 from the color video signal input to the line input terminal 28 is provided. That is, the signal processing IC 2 has a processing circuit for converting the image pickup signal from the image pickup device 21 and the color video signal from the line input terminal 28 into standard luminance signals and color signals. for that reason,
Even when the camera-integrated VTRs having different formats as shown in the examples of FIGS. 1 and 3 can be used in common without waste, the cost can be reduced.

Further, in the signal processing IC 2 as shown in FIG. 2, the signal processing circuits 23 and 24 and the YC separation circuit 29 also serve as the delay circuits 101 and 102, so that the cost can be further reduced.

Further, as shown in the examples of FIGS. 1 and 3,
Commonly used signal processing IC 2 and VTR processing IC
The IC is divided into 3 and 4. Therefore, when configuring camera-integrated VTRs of different formats, only the VTR processing ICs 3 and 4 need to be developed corresponding to the formats, which can shorten the product development period and significantly reduce the risk.

In the above embodiment, the signal processing I
Although the color difference signal C is output from C2 as a color signal, it may be configured to output a color signal of another format such as a carrier color signal or a primary color signal. In that case, the VTR processing IC needs to be changed correspondingly.

Further, in the above-mentioned embodiment, the example of the camera-integrated type 8 mm VTR and the camera-integrated type digital VTR is shown, but the signal processing is also carried out when the camera-integrated VTR of other formats such as VHS system is constructed. I
Of course, C2 can be commonly used without waste.

[0040]

According to the first aspect of the invention, there is provided a first processing circuit (camera processing circuit) for processing an image pickup signal output from a color image pickup device to obtain a luminance signal and a color signal.
And a second processing circuit (YC separation circuit) for separating a luminance signal and a color signal from a color video signal. That is, since the image pickup signal output from the color image pickup device and the processing circuit for converting the color video signal into the standard luminance signal and the standard color signal are provided, it is wasteful when a camera-integrated VTR having a different format is configured. It can be used in common and can reduce costs.

According to the second aspect of the invention, since the delay circuit used in the first and second signal processing circuits is also used, the cost can be further reduced.

According to the third aspect of the present invention, a signal processing device for converting an image pickup signal output from a color image pickup device and a color video signal into standard luminance signals and color signals,
Since a recording processing device that forms a recorded video signal from the luminance signal and the color signal is divided into ICs, when a camera-integrated VTR having different formats is configured, only the recording processing device is developed corresponding to each format. The product development period can be shortened, and the risk can be greatly reduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a connection diagram showing a specific configuration of part of a signal processing IC.

FIG. 3 is a block diagram showing the configuration of another embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of a camera-integrated 8 mm VTR.

FIG. 5 is a block diagram showing the configuration of a camera-integrated digital VTR.

[Explanation of symbols]

 1, 26, 27 Changeover switch 2 Signal processing IC 3 8 mm VTR processing IC 4 Digital VTR processing IC 21 Color CCD solid-state image sensor 23 Luminance signal processing circuit 24 Color signal processing circuit 28 Line input terminal 29 YC separation circuit 35 Magnetic head

Claims (3)

[Claims] 1. A first input terminal to which an image pickup signal output from a color image pickup element is supplied, a second input terminal to which a color video signal is supplied, and an image pickup supplied to the first input terminal. A first signal processing circuit for obtaining a luminance signal and a color signal from the signal; a second signal processing circuit for separating the luminance signal and the color signal from the color video signal supplied to the second input terminal; And a switching circuit for switching a signal obtained from the second signal processing circuit, wherein the above circuits are integrated into an IC. 2. The signal processing device according to claim 1, wherein the first and second signal processing circuits use delay elements, and the first and second signal processing circuits also function as the delay elements. 3. A video recording device comprising: the signal processing device according to claim 1; and a recording processing device that forms a recording video signal from a luminance signal and a color signal output from the signal processing device.