JPS6171785A - Picture input and output interface - Google Patents

Abstract

PURPOSE:To secure the interchangeability between the input and the output by performing the processing in response the number of horizontal scan lines of the input through an A/D converter part, a data transfer part and a data processing system and producing the synchronizing signal accordant with the specifications of an output device for picture data to a synchronizing signal generating part through a control part with the data output to deliver said synchronizing signal together with the data processed by the data processing system. CONSTITUTION:The picture data A' (3 bits) supplied through an ITV camera 2 is sent to a picture data transfer part 12 through a picture data A/D converter part 11. The information on the horizontal scan line, etc. of the camera 2 is applied to a control part 15 by means of the picture data A'' (2 bits). Then an indication for transfer of the picture data is delivered. While the picture data processed by the system 3 is applied to a picture data D/A converter part 13 through a picture data line B''' (8 bits). The part 15 delivers a synchronizing signal C' accordant with the specifications of an output device for picture data through a synchronizing signal generating part 14 according to the information on the picture data.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an image input/output interface that can handle video signals with various numbers of horizontal scanning lines.

[Technical background and problems of the invention]

In the conventional image input/output ink 7ace, for example, as shown in FIG. Data processing system (3)K
It has a function of receiving the transferred and processed data and outputting it to the image data output device (4).

Conventionally, when extracting an image from an ITV camera or the like, the number of horizontal scanning lines is defined as 525 by the BIA standard. As is well known, approximately 483 of these signals are effective as iron image signals, and the remaining approximately 40 are blanking areas. However, in order to effectively perform image processing, K poses a problem in how to capture data depending on the size of the memory that can be used for images in a high-end image data processing system. The problems include the following: For example 512X5
In a 12-pixel image memory, the number of horizontal scanning lines is approximately 30 (ζ5
12 lines - 483 lines) of unprocessable image data (blank area) will be written. - 10,000, when displaying the contents of the image memory, the number of vertical columns (number of horizontal scanning lines) of the image memory is required to be ten blanking areas (approximately 40 lines, depending on the image data output device). Depending on the size of the image memory, video signals cannot be output according to the EIA standard.

In addition, for the image input/output interface, a camera with high resolution (for example, 551 horizontal scanning lines, 512 effective lines)
books) cannot be connected. In addition, the image data output device may be dedicated.

[Purpose of the invention]

In view of the current situation where the number of horizontal scanning lines of the video signal is more than 525 in the EIA standard in order to obtain the best image data in terms of image input and output, the present invention has been developed to provide TVs with different numbers of horizontal scanning lines. The purpose is to provide an image input/output interface that can provide compatibility between cameras and display devices.

[Summary of the Invention] The present invention processes input from an image data input device according to the number of horizontal scanning lines of the input by an A/D conversion section, a data transfer section, and a data processing system controlled by a control section. The control section causes the synchronization signal generation section to generate a synchronization signal according to the specifications of the image data output device and output it together with the data processed by the data processing system (this makes the input and output compatible). It is.

[Embodiments of the invention]

FIG. 1 is a block diagram including an embodiment of the present invention.
1) to (4) are the same as the device explained in FIG.

aυ is the image data A/D converter, α force is the A/D converter a
This is an image data transfer unit that transmits the image data A/D converted by υ to the image data processing system (3).

α power is an image data D/A converter that D/A converts the data processed by the image data processing system (3) and outputs it to the image data output device (4). a synchronization signal generation circuit that generates a synchronization signal in accordance with the specifications of the power device (4); (151 is a control unit that controls input and output of image data on a $-basis basis);

Next, the operation shown in FIG. 1 will be explained. Images input from an image data input device (for example, an ITV TV camera) are data (Δ1
(3 pits) is sent to the image data transfer unit α4 through the image data A/D converter αυ. At this time, 1. 11〉 information such as the ITV TV camera flat scanning line is given to the control unit α9 using A (2 bits), and according to this information A, the control unit 0 outputs the control signal B to the image data transfer unit (1) and transfers the image data. A transfer instruction is given. Processed by the unidirectional image data processing system (3)
The image data enters the image data D/A converter 3 through the image data line B (8 bits). At this time, information such as horizontal scanning lines of the image data output device (4) is
According to this information, the control unit α9 outputs a control signal F for causing the synchronization signal generating unit I to output a synchronization signal c/y that conforms to the specifications of the image data output device.

If the control unit 9 is provided with a ROM, the ROM address can be switched according to the specifications of the image data input device to control the transfer of each image data, and more effective image data can be extracted. Similarly, for the output of image data, a separate ROM is provided and, for example, when displaying on a monitor, the number of horizontal scanning lines is 581, and the entire area of 512 x 512 pixels can be displayed. l
When recording to 'LL, etc., use NTSC signal or EI.
It is possible to perform demodulation to a video signal that conforms to the A standard.

〔Effect of the invention〕

The present invention is as described above, and includes: 1) wide compatibility with various image data input devices, TV cameras, and ITVTV camera connections; 11) Compatibility is also achieved in image data display and recording devices.

Since video signals with different numbers of horizontal scanning lines can be taken in from the ITVTV camera image input device depending on the image memory, the memory can be used effectively. Effects such as this can be obtained.

[Brief explanation of drawings]

FIG. 1 is a block diagram including an embodiment of the present invention, and FIG. 2 is a block diagram illustrating the functions of the image input/output ink 7ace. 1. Image input/output interface 2; Image data input device 3; Image data processing system 4; Image data output device (11, 12); Image data transfer section (13, 14); Image data transmission sound b 15; Control section substitute Person Patent Attorney Inoue - Male Figure 1 Figure 2

Claims (1)

[Claims] An image data input/output interface interposed between an image data input device, an image data processing system, and an image data output device, comprising a control unit and a control unit that controls the number of horizontal scanning lines of the image data input device according to instructions from the control unit. an image data transfer unit that outputs image data according to the image data processing system to the image data processing system; and a synchronization signal generated according to the specifications of the image data output device in accordance with instructions from the control unit and a An image input/output interface comprising: an image data sending section that sends image data to an image data output device.