JPH05252538A - Video camera - Google Patents

Abstract

PURPOSE:To simultaneously obtain a video signal in a standard aspect ratio, and the video signal in a wide aspect ratio horizontally longer than the standard aspect ratio. CONSTITUTION:This camera is equipped with an image pickup element (CCD or the like) having an image pickup face in the wide aspect ratio (lateral and longitudinal ratio is X:Y, that is, 16:9) horizontally longer than the standard aspect ratio (lateral and longitudinal ratio is x:y, that is, 4:3), and an aspect ratio converting means (FIFO memory device) 126 which converts the video signal in the wide aspect ratio outputted from the image pickup element, into the video signal in the standard aspect ratio.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to video cameras.

[0002]

2. Description of the Related Art For example, from the current standard television system having an aspect ratio of 4: 3 (for example, NTSC system),
It is compatible with this and has an aspect ratio wider than this
6: 9 EDTV (Extended Definition Television)
When moving to the method, both methods will coexist in the middle of the transfer.

Therefore, first, the applicant of the present invention captures an image of a wide aspect ratio in a video camera device which outputs a television signal of a wide aspect ratio which is compatible with the current standard television system. Image sensor, aspect ratio conversion circuit for converting wide aspect ratio video signal output from the image sensor to current standard television system aspect ratio video signal, wide aspect ratio video signal and aspect ratio conversion circuit Switching means for selectively switching between the standard aspect ratio video of the current standard television system, the processing circuit for performing various signal processing on the video signal of the aspect ratio selected by the switching means, and the selected aspect ratio. A video camera with an electronic viewfinder for ratio image monitoring is Flat No. 3-109673 (at the time of filing the present application, non known) has been proposed.

[0004]

According to such a video camera, an image pickup device for picking up an image with a wide aspect ratio is provided, and an aspect ratio conversion circuit is combined with the image pickup device to obtain the aspect ratio of the current standard television system. Since a video signal having a wide aspect ratio can be selectively obtained, it is practically convenient and economical, which is preferable.

However, such a video camera has a drawback in that it cannot simultaneously obtain video signals having the aspect ratio and wide aspect ratio of the current standard television system.

In view of the above point, the present invention aims to propose a video camera capable of simultaneously obtaining a video signal having a standard aspect ratio and a video signal having a wide aspect ratio which is horizontally longer than the standard aspect ratio.

[0007]

The video camera according to the first aspect of the present invention has a wide aspect ratio (horizontal and vertical ratio) that is longer than the standard aspect ratio (horizontal and vertical ratio is x: y). X: Y), an image sensor having an image pickup surface is provided, and a video signal of a wide aspect ratio is supplied from the image sensor, and a video signal of a standard aspect ratio is supplied. The aspect ratio conversion means 126 for converting into a signal is provided.

The video camera according to the second aspect of the present invention has a wide aspect ratio (horizontal and vertical ratio is X: Y) longer than a standard aspect ratio (horizontal and vertical ratio is x: y). An image pickup device having an image pickup surface is provided, a video signal from the image pickup device is output, and a time axis expansion means 126 to which a video signal having a wide aspect ratio is supplied from the image pickup element is provided, and the time axis expansion means 126 is provided. By
After extracting xY / yX in the video section of each line signal of the video signal of the wide aspect ratio from the image sensor, yX / x
The time axis is expanded Y times to obtain a video signal having a standard aspect ratio.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Two embodiments of the present invention will now be described with reference to the drawings (for example, a video camera adapted to obtain an NTSC television signal and an EDTV television signal compatible therewith). Let's explain in detail. First, the video camera of the embodiment (1) will be described with reference to FIGS. 1 to 4 show the embodiment (1)
The circuit of each part which divided the camera of into 4 is shown. Further, terminals 1 to 8 are provided in each circuit in FIGS. 1 to 4 to show that terminals having the same reference numerals are connected to each other.

First, the description starts with FIG. Image pickup signals from an image pickup device (not shown) having an image pickup surface with an aspect ratio of 16: 9, for example, red, green, and blue CCDs, are supplied to an A / D converter and digitized. Each sampling frequency is, for example, 18M
A digital red signal (R), a digital green signal (G), and a digital blue signal (B) of Hz are supplied to a digital signal processor (DSP) 101 to perform signal processing (P
R) and image enhancement processing (IE). This processor 101 has a digital title signal (Title)
And a digital title back signal (Title Back) signal. Then, from the processor 101, the sampling frequency is 18 MHz and the aspect ratio is 16: 9.
Luminance signal for digital viewfinder (VF-Y),
Digital high resolution detail signal (DT) with sampling frequency of 36MHz and aspect ratio of 16: 9
L), a digital luminance signal (Y) with a sampling frequency of 18 MHz and an aspect ratio of 16: 9, a sampling frequency of 18 MHz, and an aspect ratio of 16:
9 digital red color difference signal (RY), sampling frequency 18MHz, aspect ratio 16: 9 digital blue color difference signal (BY) and digital overlay signal (Over Lay Data) are output, and digital encoder Is supplied to 102.

From the digital encoder 102, a viewfinder digital video signal (VF Video) having a sampling frequency of 18 MHz and an aspect ratio of 16: 9, a digital marker signal (Marker) and a sampling frequency of 3 are set.
A digital composite color video signal (Composite) for test output having an aspect ratio of 16: 9 is output at 6 MHz.

Then, in the digital encoder 102,
In the identification signal adding circuits 103 and 106, a 1-bit aspect ratio indicating that the aspect ratio is 16: 9 at the position of a predetermined line number in each vertical blanking period of the luminance signals (VF-Y) and (Y). An identification signal is added.

An adder (a multiplier is also possible) 105 is added to the luminance signal (VF-Y) to which the aspect ratio identification signal is added.
Then, from the display signal generator 104, a FIFO memory device 126 as a time axis conversion device which will be described later with reference to FIG.
The digital display signal indicating which part of the screen of the video signal having the aspect ratio of 4: 3 is added to the digital video signal (VF Video) ) Is obtained.

To explain with reference to FIG. 9, FIG. 9 (A)
Indicates a playback screen with an aspect ratio of 16: 9. Figure 9
In (B), of the playback screen with an aspect ratio of 16: 9, the playback screen with an aspect ratio of 4: 3 has two straight cut lines (white and black) in the left and right vertical directions indicated by dotted lines. Or a line of a predetermined color). FIG. 9 (C)
Indicates that, in the playback screen with an aspect ratio of 16: 9, the playback screen with an aspect ratio of 4: 3 has two strip-shaped regions (white, black, or a strip of a predetermined color) in the left and right vertical directions indicated by diagonal lines. Area).

Referring to FIG. 10, FIG.
(A) shows a video signal, for example, a line signal of a luminance signal. 10B shows a line signal of a luminance signal including a display signal of a black cut line, FIG. 10C shows a line signal of a luminance signal including a display signal of a black band region, and FIG.
0 (D) indicates a line signal of a luminance signal including a display signal of a white band area.

Next, FIG. 2 will be described. The viewfinder digital video signal (VF Video) from the digital encoder 102 of FIG. 1 is supplied to the D / A converter 107 to be converted into an analog signal. This viewfinder analog video signal is a low-pass filter with a cutoff frequency of 18 MHz. 1
It is supplied to the adder 110 through 08 and the changeover switch 109. On the other hand, a marker signal (Marker) from the digital encoder 102 is supplied to the OR gate 115, and a digital character signal from an external character signal generator (not shown) is supplied to the OR gate 115 and its output side is supplied. Is supplied to the adder 110 through the low pass filter / attenuator 116 and the on / off switch 117, and the changeover switch 110
Is added to the output signal of. Each aspect ratio is 1
The return video signals of 6: 9 and 4: 3 (video signal during broadcasting, reproduced video signal from VTR, etc.) are switched and selected by the changeover switch 114, and then supplied to the adder 110 through the on / off switch 113. .. Adder 1
The output of 10 is supplied to a viewfinder (for example, a CRT receiver) 111, and the viewfinder 11
The identification signal detector 112 of 1 has an aspect ratio of 1
The presence or absence of the 6: 9 identification signal is detected.

As shown in FIG. 11, the viewfinder 111 uses a CRT having an aspect ratio of 4: 3, and the identification signal detector 112 uses the aspect ratio at a predetermined line number in the vertical blanking period of the viewfinder video signal. When the identification signal indicating that the ratio is 16: 9 is not detected, the CRT determines that the aspect ratio is 4: 3.
When the identification signal indicating that the aspect ratio is 16: 9 is detected, the vertical deflection circuit for the CRT is controlled so that the vertical amplitude is 3/4 as shown in FIG. The aspect ratio is 4:
A 3 × 3/4, that is, 16: 9 reproduction screen is displayed.

The sampling frequency from the digital encoder 102 of FIG. 1 is 36 MHz, and the aspect ratio is 1.
The 6: 9 digital composite color video signal is D /
The analog composite color video signal supplied to the A converter 118 and converted into an analog signal has a cutoff frequency of 36.
Through the low pass filter 119 of MHz, the adder 12
0 and is added to the character signal from the low-pass filter / attenuator 116 supplied through the on / off switch 121, or is not added and the analog composite color video signal (VB) having an aspect ratio of 16: 9 is added.
It is output as S).

Next, FIG. 3 will be described. Reference numeral 126 denotes a FIFO (first-in-first-out) memory device, which is an asynchronous writing and reading device, as a time axis conversion device, and includes four FIFO memory elements 127a to 127a.
7d and its four FIFO memory elements 127a-12
7d write and read control and 36MHz and 27M to the first FIFO memory element 127a
Selective supply of clock signal of Hz and three FIFO memory elements 127b to 127 from the second to the bottom
It is composed of a FIFO control circuit 128 for selectively supplying the clock signals of 18 MHz and 13.5 MHz to 27d.

First, for example, a detail signal (DTL) having an aspect ratio of 16: 9 for an image shown in FIG. 12 (I) from the digital signal processor 101 of FIG. 1 is transferred to the FIFO memory element 127a.
While writing with a 36 MHz clock signal from the control circuit 128, the aspect ratio of the image from the signal processor 101 as shown in FIG.
The 6: 9 luminance signal (Y), the red color difference signal (RY), and the blue color difference signal (BY) are respectively stored in the FIFO memory device 1.
18 from the FIFO control circuit 128 to 27b to 127d.
Write with a MHz clock signal.

Then, a signal of a 12/16 section at an arbitrary position of the video section of each line signal of the detail signal (DTL) of FIG. 12 (I) stored in the FIFO memory element 127a is shown in FIG. 12 (II). 27 MH from the FIFO control circuit 128 so that each of the cut video sections is expanded to 16/12 as shown in FIG. 12 (III).
Read with the clock signal of z. Similarly, FIG. 12 stored in the FIFO memory elements 127b to 127d.
The signal of the 12/16 section at an arbitrary position of the video section of each line signal of the luminance signal (Y), the red color difference signal (RY) and the blue color difference signal (BY) of (I) is shown in FIG. As shown in FIG. 12 (III), the data is read out by the clock signal of 13.5 MHz MHz from the FIFO control circuit 128 so as to extend the time of each video section cut out as shown in FIG. 12 (III) to 16/12.

Thus, the FIFO memory elements 127a ...
From 127d, as shown in FIG. 12 (IV), a detail signal (DTL), a luminance signal (Y), a red color difference signal (RY), and a blue color difference signal (B-) having an aspect ratio of 4: 3, respectively.
Y) is obtained, and these signals are output by the digital encoder 129.
Is supplied to and encoded by a high-resolution composite color video signal and a high-resolution luminance signal (Y), a red color difference signal (RY), and a blue color difference signal (BY), respectively. Each of them is converted into an analog signal by the D / A converter 130, supplied to the low-pass filter 131 having a cutoff frequency of 27 MHz to remove high frequency components, and each has an aspect ratio of 4: 3.
High-resolution analog composite color video signal (V
BS), an analog luminance signal (Y), an analog red color difference signal (RY) and a blue color difference signal (BY).
The adder 125 adds the horizontal and vertical synchronizing signals and the color burst signal to the luminance signal (Y).

Generally speaking, this is as follows. That is, the standard aspect ratio (horizontal and vertical ratio is x: y
Image pickup device (CCD) having an image pickup surface with a horizontally wide aspect ratio (horizontal and vertical ratios are X: Y)
The wide aspect ratio video signal from the device is supplied to the FIFO memory device 126.
After extracting xY / yX of the video section of each line signal of the video signal of the wide aspect ratio from the image pickup device, the time axis expansion is performed to yX / xY times to obtain the video signal of the standard aspect ratio.

The FIFO memory device 126 is capable of bidirectional operation, and as will be described later, a video signal with an aspect ratio of 4: 3 from a digital VTR (not shown) is converted into an image with an aspect ratio of 16: 9. It also has the function of converting to a signal.

Further, the luminance signal (Y), the red color difference signal (RY), and the blue color difference signal (B) each having an aspect ratio of 16: 9 from the digital signal processor 101 shown in FIG.
-Y) is supplied to the identification signal adding circuit 122, and an identification signal indicating that the aspect ratio is 16: 9 is added to a predetermined line number in the vertical blanking period of the luminance signal (Y). , D / A converter 123, and after being converted into analog signals respectively, the cutoff frequency is 18M.
The high frequency component is removed by being supplied to the low pass filter 124 of Hz, and the analog luminance signal (Y), the analog red color difference signal (RY) and the blue color difference signal (BY) having an aspect ratio of 16: 9 are respectively generated. Is output. The luminance signal (Y)
, The horizontal and vertical sync signals and the color burst signal are added in the adder 125.

Next, the circuit of FIG. 4 will be described. 133 is a bidirectional circuit, the left side of which is connected to the FIFO memory elements 127b to 127d and the digital signal processor 101, and the right side thereof is a digital VTR (not shown) via a digital interface bus.
Connected to. Each circuit of the bidirectional circuit 133 can operate bidirectionally, and constants and the like differ depending on the respective directions.

First, the bidirectional circuit 133 when the digital VTR is in the recording mode will be described. The sampling frequency from the digital signal processor 101 is 18
Luminance signal (Y) with an aspect ratio of 16: 9 at MHz
Is supplied to the switching circuit 140 through the delay device 137 and the low-pass filter 138, and is also supplied to the rate converter 139 so that the sampling frequency is 18M.
After conversion from Hz to 13.5 MHz, switching circuit 1
40, and the switching output of the switching circuit 140 is supplied to the multiplexer / demultiplexer 141.

The sampling frequency from the digital encoder 102 is 9 MHz, and the multiplexed red color difference signal (RY) and the multiplexed blue color difference signal (BY) having an aspect ratio of 16: 9 are low pass filters. It is supplied to the rate converter 135 through 134 to change the sampling frequency from 9 MHz to 6.75 MH.
While being converted into z, the output of the low pass filter 134 is supplied to the switching circuit 136, and the switching circuit 136.
Switching output of the multiplexer / demultiplexer 14
1 is supplied. Then, a time division multiplexed signal (Y + U + D) having a sampling frequency of 27 MHz or 36 MHz and an aspect ratio of 16: 9 is obtained from the multiplexer / demultiplexer 141, and the identification signal addition circuit 142 is obtained.
Then, after an identification signal indicating that the aspect ratio is 16: 9 is inserted at a predetermined line number of the vertical blanking of the luminance signal (Y), it is supplied to the switching circuit 148.

Further, a luminance signal (Y) having a sampling frequency of 13.5 MHz and an aspect ratio of 4: 3 from the FIFO memory device 126b of FIG. 3 is transmitted to the delay device 143 and the low-pass filter (D-1 format digital VTR). It is supplied to the multiplexer / demultiplexer 147 through the luminance signal low pass filter) 144. Figure 3
Sampling frequencies from the FIFO memories 126c and 126d are 13.5 MHz, and the aspect ratio is 4: 3 for the red color difference signal (RY) and the blue color difference signal (B-).
Y) is a multiplexer / demultiplexer 145 and a low-pass filter (D-1 format digital VTR).
(Red low-pass filter for red difference and blue difference signals) 146 to the multiplexer / demultiplexer 147. Then, from the multiplexer / demultiplexer 147, a time division multiplexed signal (Y + U + V) having a sampling frequency of 27 MHz and an aspect ratio of 4: 3 is obtained and supplied to the switching circuit 148.

On the output side of the switching circuit 148, a time division multiplexed signal (Y + U + V) having a sampling frequency of 36 MHz and an aspect ratio of 16: 9, a sampling frequency of 27 MHz and an aspect ratio of 16: 9. One of the division multiplex signals (Y + U + V) and the time division multiplex signal (Y + U + V) having a sampling frequency of 27 MHz and an aspect ratio of 4: 3 is selectively output and supplied to the digital VTR through the digital interface for recording.

Next, the bidirectional circuit 133 when the digital VTR is in the reproduction mode will be described. A sampling frequency of 36 MHz reproduced from a digital VTR, a time division multiplexed signal (Y + U + V) with an aspect ratio of 16: 9, a sampling frequency of 27 MHz, and an aspect ratio of 16: 9.
One of the 9 time division multiplexed signals (Y + U + V) and the time division multiplexed signal (Y + U + V) having a sampling frequency of 27 MHz and an aspect ratio of 4: 3 is selectively supplied to the switching circuit 148 through the digital interface.

The time-division multiplexed signal (Y + U + V) with the sampling frequency of 27 MHz and the aspect ratio of 16: 9 from the switching circuit 148 is supplied to the multiplexer / demultiplexer 141 through the identification signal adding circuit 142, and the luminance signal ( Y), the multiplexed red color difference signal (RY), and the multiplexed blue color difference signal (BY), and the luminance signal (Y) is switched to the switching circuit 1.
It is supplied to the rate converter 139 through 40, and the sampling frequency is from 13.5 MHz to 18 MHz.
Low pass filter 138 and delay device 1
It is supplied to the digital encoder 102 through 37. Also, the multiplexed red color difference signal (RY),
The multiplexed blue color difference signal (BY) is supplied to the rate converter 135 through the switching circuit 136, and its sampling frequency is from 6.75 MHz to 9M.
After being converted to Hz, it is supplied to the digital encoder 102 through the low pass filter 134.

The time division multiplex signal (Y + U + V) having a sampling frequency of 36 MHz and an aspect ratio of 16: 9 from the switching circuit 148 is supplied to the multiplexer / demultiplexer 141 through the identification signal adding circuit 142, and the luminance signal ( Y), the multi-colored red difference signal (RY), and the multiplexed blue difference signal (BY), and the luminance signal (Y) is switched to the switching circuit 1.
40, the low pass filter 138 and the delay device 137, and is supplied to the digital encoder 102. Further, the red difference signal (RY) which is marchiplexed and the blue difference signal (BY) which is multiplexed are switched circuit 13.
6. The signal is supplied to the digital encoder 102 through the low pass filter 134.

The time-division multiplexed signal (Y + U + V) having a sampling frequency of 27 MHz and an aspect ratio of 4: 3 from the switching circuit 148 is supplied to a multiplexer / demultiplexer 147 to be subjected to the luminance signal (Y) and marchiplex. The red color difference signal (RY) and the multiplexed blue color difference signal (BY) are separated. The luminance signal (Y) has a sampling frequency of 13.5 MHz obtained through the low-pass filter 144 and the delay device 143,
The luminance signal (Y) having an aspect ratio of 4: 3 is supplied to the digital encoder 129 of FIG. 3 and is also supplied to the FIFO memory device 127b and compressed for 12/16 to have an aspect ratio of 4: 3. After being converted into a luminance signal (Y), it is supplied to the digital encoder 102 of FIG. 1 and also supplied to the D / A converter 123 through the identification signal adding circuit 122.

Red color difference signal (R-
Y), the multiplexed blue color difference signal (BY) is
The sampling frequency supplied to the multiplexer / demultiplexer 145 through the low-pass filter 146 is 13.5 MHz, and the red difference signal (RY) and the blue difference signal (B-
Y) is supplied to the digital encoder 129 of FIG. 3 and also supplied to the FIFO memory elements 127c and 127d and time-compressed to 12/16, and a red color difference signal (RY) having an aspect ratio of 4: 3. And the blue difference signal (B-
Y), the digital encoder 102 of FIG.
And is supplied to the D / A converter 123 through the identification signal adding circuit 122.

Next, the video camera of the embodiment (2) will be described with reference to FIGS. 5 to 8 show circuits of respective parts obtained by dividing the video camera of the embodiment (2) into four parts. In addition, the terminals 11 to 1 are added to the circuits of FIGS.
9 is provided to indicate that terminals having the same reference numeral (number) are connected to each other. In the above-described embodiment (1), two digital encoders 102 and 129 are provided, but in this embodiment (2), one common digital encoder 233 is provided.

First, the description starts with FIG. Image pickup signals from an image pickup device (not shown) having an image pickup surface with an aspect ratio of 16: 9, for example, red, green, and blue CCDs, are supplied to an A / D converter and digitized. Each sampling frequency is, for example, 18M
The digital red signal (R), the digital green signal (G), and the digital blue signal (B) of Hz are supplied to the digital signal processor (DSP) 201 to perform signal processing (P
R) and image enhancement processing (IE). This processor 101 has a digital title signal (Title)
And a digital title back signal (Title Back) signal. Then, from the processor 201, the sampling frequency is 18 MHz and the aspect ratio is 16: 9.
Luminance signal for digital viewfinder (VF-Y),
Digital high resolution detail signal (DT) with sampling frequency of 36MHz and aspect ratio of 16: 9
L), a digital luminance signal (Y) with a sampling frequency of 18 MHz and an aspect ratio of 16: 9, a sampling frequency of 18 MHz, and an aspect ratio of 16:
A digital red color difference signal (RY) of 9, a sampling frequency of 18 MHz, a digital blue color difference signal (BY) of an aspect ratio of 16: 9 and a digital overlay signal (Over Lay Data) are output, and the circuit 202 Is supplied to.

The digital viewfinder luminance signal (VF-Y) having a sampling frequency of 18 MHz and an aspect ratio of 16: 9 is supplied to the identification signal adding circuit 219 through the delay device 214, and is supplied to the identification signal adding circuit 219 during the vertical blanking period. After an aspect ratio identification signal indicating that the aspect ratio is 16: 9 is inserted at a predetermined line number,
It is supplied to the switching circuit 224. The digital high resolution detail signal (DTL) having a sampling frequency of 36 MHz and an aspect ratio of 16: 9 is supplied to the switching circuit 225 via the delay device 215. The digital luminance signal (Y) having a sampling frequency of 18 MHz and an aspect ratio of 16: 9 is supplied to the identification signal adding circuit 220 through the delay device 216, and the aspect ratio is provided at a predetermined line number in the vertical blanking period. After the aspect ratio identification signal indicating that the ratio is 16: 9 is inserted, it is supplied to the switching circuit 226. Sampling frequency is 1
The digital red color difference signal (RY) having an aspect ratio of 16: 9 at 8 MHz is supplied to the identification signal adding circuit 221 through the delay unit 217, and the aspect ratio is added to a predetermined line number in the vertical blanking period. After the aspect ratio identification signal indicating that the ratio is 16: 9 is inserted, it is supplied to the switching circuit 227. Sampling frequency is 1
The digital blue color difference signal (BY) having an aspect ratio of 16: 9 at 8 MHz is supplied to the identification signal adding circuit 222 through the delay device 218, and the aspect ratio is provided at a predetermined line number in the vertical blanking period. After the aspect ratio identification signal indicating that the ratio is 16: 9 is inserted, it is supplied to the switching circuit 228. The digital overlay signal (Over Lay Data) is supplied to the digital encoder 233 described later with reference to FIG. 7 through the delay device 223.

Numerals 203 to 207 are FIFO memory elements as a time axis conversion device, in which writing and reading are asynchronous, and the FIFO control circuit 208 causes the FIFO memory elements to read the FIFO memory elements.
Control of writing and reading of the memory elements 203 to 207 and selective supply of a clock signal are controlled.

Sampling frequency is 18 MHz, aspect ratio 16: 9 digital viewfinder luminance signal (VF-Y), sampling frequency is 36 MHz
And a digital high resolution detail signal (DTL) with an aspect ratio of 16: 9 and a sampling frequency of 18 MHz
Then, a digital luminance signal (Y) having an aspect ratio of 16: 9, a sampling frequency of 18 MHz, a digital red color difference signal (RY) having an aspect ratio of 16: 9 and a sampling frequency of 18 MHz, and an aspect ratio of 1
The 6: 9 digital blue color difference signal (BY) is F
It is supplied to the IFO memory elements 203 to 207, and 18 MHz from the FIFO control circuit 208 [36 MH only in the case of a digital high resolution detail signal (DTL)]
z] clock signal.

Then, the FIFO memory elements 203 to 20
12 (I) stored in each of FIG. 7 has a sampling frequency of 18 MHz and an aspect ratio of 16: 9 for a digital luminance signal for a digital viewfinder (VF-
Y), a sampling frequency of 36 MHz, and an aspect ratio of 16: 9, a digital high resolution detail signal (DT).
L), the sampling frequency is 18 MHz, the digital luminance signal (Y) having an aspect ratio of 16: 9, the sampling frequency is 18 MHz, the digital red color difference signal (RY) having the aspect ratio of 16: 9, and the sampling frequency is 1
The signal of 12/16 section at an arbitrary position of the video section of each line signal of each digital blue color difference signal (BY) having an aspect ratio of 16: 9 at 8 MHz is cut as shown in FIG. As shown in 12 (III), a 13.5 MHz clock signal (27 MHz only in the case of digital high resolution detail signal (DTL)) from the FIFO control circuit 128 is used so that each clipped video section is time-extended to 16/12. After reading out, they are supplied to rate converters (having an interpolation filter) 209 to 213, respectively, and their sampling frequencies are set to 13.5.
Digital luminance signal for viewfinder with an aspect ratio of 4: 3, respectively, by converting from MHz [27 MHz only for digital high resolution detail signal (DTL)] to 18 MHz [36 MHz only for digital high resolution detail signal (DTL)]. (VF-Y), a digital high resolution detail signal (DTL), a digital luminance signal (Y), a digital red color difference signal (RY) and a digital blue color difference signal (BY) are obtained, and the switching circuit 2 respectively.
24 to 228. Switching circuits 224 to 228
Are switched by a switching control signal (4: 3/16: 9sel.).

Next, FIG. 6 will be described. A digital luminance signal (Y), a digital red color difference signal (RY), and a digital blue color difference signal (B) having an aspect ratio of 4: 3 or 16: 9 and a sampling frequency of 18 MHz from the switching circuits 226 to 228 of FIG. -Y) is the identification signal adding circuit 2
29, and when the aspect ratio is 16: 9, an identification signal indicating that the aspect ratio is 16: 9 is added at a predetermined line number in the vertical blanking period of each signal. After being supplied to the A / A converter 230 and converted into analog signals, respectively, the cutoff frequency becomes 18
It is supplied to the low pass filter 231 of MHz to remove high frequency components and has an aspect ratio of 4: 3 or 16: respectively.
9 analog luminance signal (Y), analog red difference signal (R
-Y) and a blue color difference signal (BY) are output. The horizontal and vertical synchronization signals and the color burst signal are added by the adder 232 to the luminance signal (Y).

Next, FIG. 7 will be described. The aspect ratio from the switching circuits 226 to 228 of FIG. 5 is 4: 3 or 16:
9, a viewfinder digital luminance signal (VF-Y) having a sampling frequency of 18 MHz, a digital high resolution detail signal (DTL), a digital luminance signal (Y), a digital red color difference signal (RY) and a digital blue color difference signal. (BY) and the digital overlay signal (Over Lay Data) from the delay device 223 are supplied to the digital encoder 233. Then, from the digital encoder 233, a viewfinder digital video signal (VF Video) and a digital marker signal (Mar) with a sampling frequency of 18 MHz and an aspect ratio of 16: 9 or 4: 3.
ker), the sampling frequency is 36 MHz, and the aspect ratio is 16: 9, and a digital composite color video signal (Composite) for test output is output.

Then, in the digital encoder 233,
In the identification signal adding circuits 234 and 235, a 1-bit aspect ratio indicating that the aspect ratio is 16: 9 is provided at a position of a predetermined line number in each vertical blanking period of the luminance signals (VF-Y) and (Y). An identification signal is added.

The viewfinder digital video signal (VF Video) from the digital encoder 233 is supplied to the D / A converter 236 to be converted into an analog signal. The viewfinder analog video signal has a cutoff frequency of 18 MHz.
z low pass filter 236 and changeover switch 238
Through the adder 239. On the other hand, the marker signal (Marker) from the digital encoder 233 is supplied to the OR gate 244, and the digital character signal from the external character signal generator (not shown) is ORed.
The character signal supplied from the output side of the gate 244 is supplied to the adder 239 through the low pass filter / attenuator 245 and the on / off switch 246,
It is added to the output signal of the changeover switch 238. Return video signals with aspect ratios of 16: 9 and 4: 3 (video signals during broadcasting, video signals played back from VTR, etc.)
Is selected by the changeover switch 241 and then supplied to the adder 239 through the on / off switch 240. The output of the adder 239 is supplied to the viewfinder (for example, CRT receiver) 242, and by the identification signal detector 243 of the viewfinder 242,
The presence or absence of the identification signal with the aspect ratio of 16: 9 is detected.

In the viewfinder 242, the identification signal detector 243 has an aspect ratio of 1 at a predetermined line number in the vertical blanking period of the viewfinder video signal.
When the identification signal indicating 6: 9 is not detected, the CRT having the screen with the aspect ratio of 4: 3 is kept as it is, and when the identification signal is detected, the vertical deflection circuit for the CRT is controlled. The vertical amplitude is set to about 3/4 so that a playback screen with an aspect ratio of 16: 9 can be obtained.

A digital composite color video signal having a sampling frequency of 36 MHz from the digital encoder 233 and an aspect ratio of 16: 9 or 4: 3 is D
The analog composite color video signal is supplied to the A / A converter 118 and converted into analog, and the cutoff frequency is 36
The adder 24 is passed through the low pass filter 248 of MHz.
9 and an analog composite color video signal having an aspect ratio of 16: 9 or 4: 3 added or not added to the character signal from the low-pass filter / attenuator 245 supplied through the on / off switch 250. It is output as (VBS).

Next, the circuit of FIG. 8 will be described. Reference numeral 268 denotes a bidirectional circuit, the left side of which is connected to the switching circuit 226 and the digital encoder 233 and the right side of which is connected to a digital VTR (not shown) via a digital interface bus. This bidirectional circuit 26
Each circuit constituting 8 can operate bidirectionally, and constants and the like differ depending on the respective directions.

First, the bidirectional circuit 268 when the digital VTR is in the recording mode will be described. Switching circuit 226
The luminance signal (Y) having a sampling frequency of 18 MHz and an aspect ratio of 16: 9 is supplied to the switching circuit 254 through the delay device 261 and the low-pass filter 262, and is also supplied to the rate converter 263 to change the sampling frequency. After being converted from 18 MHz to 13.5 MHz, it is supplied to the switching circuit 264, and the switching output of the switching circuit 264 is supplied to the multiplexer / demultiplexer 265.

The sampling frequency from the digital encoder 233 is 18 MHz, and the multiplexed red color difference signal (RY) and the multiplexed blue color difference signal (BY) with the aspect ratio of 16: 9 are the low pass filters 258. Is supplied to the rate converter 259 through the sampling frequency from 9 MHz to 6.75 MH
While being converted into z, the output of the low-pass filter 258 is supplied to the switching circuit 260, which switches the switching circuit 260.
The switching output of the multiplexer / demultiplexer 26
5 is supplied. Then, from the multiplexer / demultiplexer 265, a time division multiplexed signal (Y + U + D) having a sampling frequency of 27 MHz or 36 MHz and an aspect ratio of 16: 9 is obtained, and the identification signal adding circuit 266 is obtained.
Then, after an identification signal indicating that the aspect ratio is 16: 9 is inserted at a predetermined line number in the vertical blanking of the luminance signal (Y), it is supplied to the switching circuit 267.

The luminance signal (Y) having a sampling frequency of 18 MHz and an aspect ratio of 4: 3 from the switching circuit 266 of FIG. 5 is supplied to the delay unit 253 and the low-pass filter (for the luminance signal of the D-1 format digital VTR). Through the low pass filter 254, the rate converter 25
5, the sampling frequency is 18MHz
From 13.5MHz to the multiplexer /
It is supplied to the demultiplexer 256. The sampling frequency from the digital encoder 233 in FIG.
In z, the multiplexed red difference / blue difference signal (RY / BY) having an aspect ratio of 16: 9 is a low pass filter (a low difference filter for red difference and blue difference signals of a D-1 format digital VTR). ) Through 251
The signal is supplied to the rate converter 252, the sampling frequency thereof is converted from 9 MHz to 6.75 MHz, and then supplied to the multiplexer / demultiplexer 256. And the multiplexer / demultiplexer 25
6, a time division multiplexed signal (Y + U + V) having a sampling frequency of 27 MHz and an aspect ratio of 4: 3 is obtained and supplied to the switching circuit 267.

On the output side of the switching circuit 267, the time division multiplexed signal (Y + U + V) having a sampling frequency of 36 MHz and an aspect ratio of 16: 9, the sampling frequency of 27 MHz and an aspect ratio of 16: 9. One of the division multiplex signals (Y + U + V) and the time division multiplex signal (Y + U + V) having a sampling frequency of 27 MHz and an aspect ratio of 4: 3 is selectively output and supplied to the digital VTR through the digital interface for recording.

Next, the bidirectional circuit 268 when the digital VTR is in the reproduction mode will be described. A sampling frequency of 36 MHz reproduced from a digital VTR, a time division multiplexed signal (Y + U + V) with an aspect ratio of 16: 9, a sampling frequency of 27 MHz, and an aspect ratio of 16: 9.
One of the 9 time division multiplexed signals (Y + U + V) and the time division multiplexed signal (Y + U + V) having a sampling frequency of 27 MHz and an aspect ratio of 4: 3 is selectively supplied to the switching circuit 267 through the digital interface.

The time-division multiplexed signal (Y + U + V) with the sampling frequency of 27 MHz and the aspect ratio of 16: 9 from the switching circuit 267 is supplied to the multiplexer / demultiplexer 265 through the identification signal adding circuit 266 and the luminance signal ( Y), the multiplexed red color difference signal (RY), and the multiplexed blue color difference signal (BY), and the luminance signal (Y) is switched to the switching circuit 2.
It is supplied to the rate converter 263 through 64, and its sampling frequency is from 13.5 MHz to 18 MHz.
Is converted into the low pass filter 262 and the delay device 2
It is supplied to the digital encoder 233 via 61. Also, the multiplexed red color difference signal (RY),
The multiplexed blue color difference signal (BY) is supplied to the rate converter 259 through the switching circuit 260, and its sampling frequency is changed from 6.75 MHz to 9M.
After being converted to Hz, it is supplied to the digital encoder 233 through the low pass filter 258.

The time division multiplexed signal (Y + U + V) with the sampling frequency of 36 MHz and the aspect ratio of 16: 9 from the switching circuit 267 is supplied to the multiplexer / demultiplexer 141 through the identification signal adding circuit 266 and the luminance signal ( Y), the multiplexed red color difference signal (RY), and the multiplexed blue color difference signal (BY), and the luminance signal (Y) is switched to the switching circuit 2.
It is supplied to the digital encoder 233 through the 64, the low pass filter 262 and the delay device 261. In addition, the multiplexed red color difference signal (RY) and the multiplexed blue color difference signal (BY) are output to the switching circuit 260,
It is supplied to the digital encoder 102 through the low-pass filter 258.

The time division multiplexed signal (Y + U + V) having a sampling frequency of 27 MHz and an aspect ratio of 4: 3 from the switching circuit 267 is supplied to the multiplexer / demultiplexer 265, and is multiplexed with the luminance signal (Y) and multiplexed. It is separated into a red color difference signal (RY) and a multiplexed blue color difference signal (BY). The luminance signal (Y) has a sampling frequency of 13.5 MHz obtained through the low-pass filter 262 and the delay device 261.
The luminance signal (Y) having an aspect ratio of 4: 3 is supplied to the digital encoder 233 in FIG. 7.

The multiplexed red difference signal (R-
Y), the multiplexed blue color difference signal (BY) is
Digital encoder 2 through low-pass filter 146
33.

[0058]

According to the video camera of the present invention described above,
It is possible to obtain a video signal having a standard aspect ratio and a video signal having a wide aspect ratio that is wider than the standard aspect ratio at the same time, and it is practically convenient and economical.

[Brief description of drawings]

FIG. 1 is a block diagram showing a part of an embodiment (1) of the present invention.

FIG. 2 is a block diagram showing another part of the embodiment (1).

FIG. 3 is a block diagram showing another part of the embodiment (1).

FIG. 4 is a block diagram showing still another part of the embodiment (1).

FIG. 5 is a block diagram showing a part of an embodiment (2) of the present invention.

FIG. 6 is a block diagram showing another part of the embodiment (2).

FIG. 7 is a block diagram showing another part of the embodiment (2).

FIG. 8 is a block diagram showing still another part of the embodiment (2).

FIG. 9 is an explanatory diagram showing a display of a screen having a different aspect ratio.

FIG. 10 is a waveform diagram showing a video signal including a display signal.

FIG. 11 is an explanatory diagram showing a CRT effective screen.

FIG. 12 is an explanatory diagram of converting a video signal having an aspect ratio of 16: 9 into a video signal having an aspect ratio of 4: 3.

[Explanation of symbols]

101 Digital Signal Processor 102 Digital Encoder 103 Addition Circuit for Identifying Signal that Indicates Aspect Ratio is 16: 9 104 Video Signal with Aspect Ratio of 4: 3, Which Part of Video Signal with Aspect Ratio of 16: 9 A circuit for generating a display signal 105 or a circuit for adding a display signal to a video signal, which part of the video signal having an aspect ratio of 4: 3 and a video signal having an aspect ratio of 16: 9. 111 Viewfinder 126 FIFO memory device 129 Digital encoder 133 Bidirectional circuit 201 Digital signal processor 203 to 207 FIFO memory device 233 Digital encoder 242 Viewfinder 268 Bidirectional circuit

Claims (2)

[Claims] 1. An image pickup device having an image pickup surface of a wide aspect ratio (horizontal and vertical ratio is X: Y) longer than a standard aspect ratio (horizontal and vertical ratio is x: y) is provided. Aspect ratio conversion means is provided for outputting a video signal from the image sensor and supplying the wide aspect ratio video signal from the image sensor to the standard aspect ratio video signal. Video camera characterized by. 2. An image pickup device having an image pickup surface having a wide aspect ratio (horizontal and vertical ratio is X: Y) longer than a standard aspect ratio (horizontal and vertical ratio is x: y). A time axis expansion means for outputting a video signal from the image sensor and being supplied with the video signal having the wide aspect ratio from the image sensor, the time axis expansion means providing the wide angle from the image sensor. A video camera, wherein xY / yX of a video section of each line signal of a video signal having an aspect ratio is extracted, and then time-axis expanded to yX / xY times to obtain a video signal having the standard aspect ratio.