JPH04119777A - Solid-state image pickup device - Google Patents

Abstract

PURPOSE:To devise the device such that the one device outputs both pattern signals without causing picture quality deterioration by driving a 1st horizontal transfer stage with a clock signal for transferring the entire pattern whose aspect ratio is 16:9 and driving a 2nd horizontal transfer stage with a clock signal for transferring the entire pattern whose aspect ratio is 4:3 and selecting a ratio of number of horizontal scanning lines for both the patterns to be 2:1 or 1:1. CONSTITUTION:A signal transferred from a photodetector 2 to a vertical transfer stage 3 is fed to a 1st horizontal transfer stage 4 and a 2nd horizontal transfer stage 5 and outputted through output stages 6,7. Moreover, a delay stage 8 is provided between the 1st horizontal transfer stage 4 and its output stage 6 as required. The 1st horizontal transfer stage 4 outputs the entire pattern whose aspect ratio is 16:9 and the 2nd horizontal transfer stage 5 outputs the entire pattern whose aspect ratio is 4:3 by using each respective clock signal. Moreover, when there is any phase difference between an output timing of the 1st horizontal transfer stage 4 and that of the 2nd horizontal transfer stage 5, the provision of the delay stage 8 eliminates the phase difference.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a solid-state imaging device capable of outputting a video signal such as an NTSC system or a PAL system having an aspect ratio of 4:3 and a video signal having an aspect ratio of 1629. .

BACKGROUND OF THE INVENTION In recent years, television video signals are shifting from the conventional NTSC and PAL formats having an aspect ratio of 4:3 to video signals having an aspect ratio of 16:9. However, rather than abandoning the 4:3 format and moving to the 16:9 format, it is conceivable that the two systems will coexist.

Assuming such coexistence, it may be required to simultaneously extract 4:3 format video and 16:9 format video from the same subject.

Currently, this can be done by shooting a 4:3 camera and a 16:9 camera side by side, or by shooting with either camera and upconverting or downconverting the video signal to create an image with the other aspect ratio. There are ways to get it.

Problems to be Solved by the Invention However, the method of arranging the conventional 4=3 camera and 16:9 camera to take pictures requires twice as many cameras and twice as many operating personnel, and requires two cameras in terms of shooting angles. The problem was that one or the other was often sacrificed.

Furthermore, methods for converting signals after shooting have the problem that image quality deteriorates in both up-conversion and down-conversion.

The present invention solves the above-mentioned conventional problems, and aims to provide a solid-state imaging device that can output a 4:3 signal and a 16=9 signal without causing image quality deterioration.

Means for Solving the Problems To achieve this object, the solid-state imaging device of the present invention has the following features:
A solid-state imaging device having a light-receiving element with an aspect ratio of 6:9, the light-receiving element being connected to a vertical transfer stage, and the output from the vertical transfer stage being connected to a horizontal transfer stage. It has two horizontal transfer stages, the first horizontal transfer stage has 16:
The second horizontal transfer stage is driven by a clock signal such that the aspect ratio of the screen is 4:3, and the second horizontal transfer stage is driven by a clock signal that transfers the entire screen of 16:9 and 4:3. It has a configuration in which the ratio of the number of horizontal scanning lines is 2:1 or 1:1.

Operation With this configuration, from the output of the first horizontal transfer stage 16:
The video signal of 9 is also output from the second horizontal transfer stage as 4=
3 video signals can be obtained.

Embodiment A solid-state imaging device according to an embodiment of the present invention will be described below with reference to FIG.

As shown in the figure, the interior of the solid-state imaging device 1 having an aspect ratio of 16:9 is configured as follows.

The signal transferred from the light receiving element 2 to the vertical transfer stage 3 is sent to the first horizontal transfer stage 4 and the second horizontal transfer stage 5, and is outputted through the output stages 6 and 7.

Further, a delay stage 8 is provided between the first horizontal transfer stage 4 and its output stage 6 as required.

The first horizontal transfer stage 4 outputs a full screen of 16:9, and the second horizontal transfer stage 5 outputs a screen with an aspect ratio of 4:3 in accordance with their respective clock signals. However, the screen output by the second horizontal transfer stage 5 is arbitrary, and by setting it at or near the center of the entire screen that is output more than the first horizontal transfer stage 4, the angle of view at the time of shooting can be adjusted. It can be determined easily and optimally for both outputs.

Furthermore, there may be a phase difference between the output timings of the first horizontal transfer stage 4 and the second horizontal transfer stage 5. For example, in FIG. 1, it is assumed that the first horizontal transfer stage 4 is in the lead. In such a case, the phase difference can be eliminated by providing the delay stage 8. Since this delay stage 8 can be constructed from the same circuit elements as the horizontal transfer stage, it can be easily constructed on the same chip.

The number of horizontal scanning lines on a 4:3 screen is 1/2 that of a 16:9 screen.
In order to achieve It can be easily achieved.

Effects of the Invention As described above, the present invention provides two horizontal transfer stages, the first horizontal transfer stage is driven by a clock signal that transfers the entire 16:9 screen, and the second horizontal transfer stage is driven by a clock signal that transfers the entire 16:9 screen. Aspect ratio is 4
:3, driven by a clock signal such that 16:
The ratio of the number of horizontal scanning lines between a 9 screen and a 4:3 screen is 2:1.
Or, an excellent solid-state imaging device that has a 1:1 configuration and can output signals with a screen ratio of 16 = 9 and a screen ratio of 4:3 without causing image quality deterioration. It is possible to realize this.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a solid-state imaging device according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Solid-state imaging device, 2... Light receiving element, 3... Vertical transfer stage, 4... First horizontal transfer stage, 6... ...Second horizontal transfer stage. Name of agent: Patent attorney Akira Okaji and 2 other people

Claims (4)

[Claims] (1) A solid-state imaging device having a light receiving element with an aspect ratio of 16:9, the light receiving element being connected to a vertical transfer stage, and an output from the vertical transfer stage being connected to a horizontal transfer stage,
Has two horizontal transfer stages, the first horizontal transfer stage is 16:9
The second horizontal transfer stage is driven by a clock signal such that the aspect ratio of the screen is 4:3, and the horizontal transfer stage of the 16:9 screen and 4:3 screen is A solid-state imaging device characterized in that the ratio of the number of scanning lines is 2:1 or 1:1. (2) The solid-state imaging device according to claim 1, wherein the center of the screen output from the second horizontal transfer stage substantially coincides with the center of the entire screen output from the first horizontal transfer stage. . (3) A solid-state imaging device according to claim 1, further comprising a delay stage constructed of circuit elements similar to those of the horizontal transfer stage, and provided between the first or second horizontal transfer stage and the horizontal output stage. (4) The ratio of the number of horizontal scanning lines between a 16:9 screen and a 4:3 screen is 2:1, and the charge transfer clock from the vertical transfer stage to the second horizontal transfer stage is 1 of the vertical transfer clock. 2. The solid-state imaging device according to claim 1, wherein: /2.