JPH02288782A - Television system - Google Patents

Abstract

PURPOSE:To secure high resolution while maintaining interchangeability with an existent television system by relating a scan synchronizing signal to scan an image pickup part and a scan synchronizing signal to scan a picture display part so as to be integral number-fold to the processing synchronizing signal of a processing recording system. CONSTITUTION:A picture signal S is divided into (n) pieces by an (n) dividing encoder 4 and during an effective period excepting for a horizontal blanking period M' of a processed picture signal S', the respective (n)-divided signals are compressed. Then, the processed picture signal S' is prepared. Since a vertical synchronizing signal is outputted once an (m) frame period of an NTSC system, signal conversion to the NTSC system is executed to the picture signal S. Accordingly, one frame period of the picture signal S is divided into 2m pieces and the vertical synchronizing signal is inserted. Since a vertical synchronizing period is 1-21H and 262.5-283H in the NTSC system, signal division is executed during the effective period excepting for the above mentioned period. The processed picture signal S' generated in such a way is wholly same as the picture signal in the NTSC system.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a television system suitable for managing and storing materials such as documents and drawings.

(Prior Art) Conventionally, television systems include the NTSC system, which has been adopted in Japan, the United States, and other countries. The number of horizontal scanning lines is 525. In addition, in Europe etc., PAL
The SECAM method is adopted, and the number of horizontal scanning lines is 625. Although it is conceivable to use these television systems for document filing, the resolution is significantly insufficient even when targeting A4 size documents, which are commonly used for documents.

In other words, an NTSC (standard) television system is primarily intended for moving images, and when an NTSC television system is used to display iii images for the purpose of filing documents, drawings, etc., the amount of information on one screen increases. Since there are so many images, the resolution is insufficient.

(Problem M to be solved by the invention) Recently, high-definition television systems are being developed, but the number of horizontal scanning lines is set at 1125, which is 3 times higher than that of an NTSC television system. It is possible to obtain a resolution that is slightly less than twice as high, but because a very wide band signal frequency is used, the specifications of the television equipment used for this high-definition television system are advanced and It becomes expensive. In addition, high-definition television systems have at most five times the amount of information as NTSC television systems, and have problems that make it difficult to manage documents, drawings, etc. that involve larger amounts of information. There is also. Furthermore, there are some problems that make it difficult to maintain compatibility with the standard method.

Therefore, an object of the present invention is to provide a television system that can ensure high resolution while maintaining compatibility with existing television systems.

(Means for Achieving the Object) In order to achieve the above object, the television system according to the present invention includes an imaging unit that reads image information and outputs an image signal, and a television system that processes and records the 1IKtIA signal as a processed image signal. a processing recording system (or processing transmission system) to
an image display section that displays iI image information based on the image signal, and one horizontal scanning period of the image tS of the image pickup section and the image display section corresponds to the processing 11111 signal of the processing recording system (or processing transmission system). The one frame period of the image signal of the imaging section and the image display section is n times one horizontal scanning period, and the one frame period of the image signal of the processing recording system (or processing transmission system) is m times the one frame period of the processed image signal of the processing recording system (or processing transmission system). The present invention is characterized in that a scanning synchronizing signal for scanning the image pickup section and a scanning synchronizing signal for scanning the image display section are related to a processing synchronizing signal for the processing and recording system.

However, n and m are positive integers.

(Function) According to the television system according to the present invention, the imaging unit has one horizontal scanning period n times one horizontal scanning period of the processed image signal of the processing recording system (or processing transmission system), and the processing recording An image signal having one frame period m times the one frame period of the processed image signal of the system (or processing and transmission system) is output.

One horizontal scanning period of this image signal is divided into n parts, and the processed at image No. f8 is input to the processing recording system (or processing transmission system). Further, one frame period of this image signal is divided into m parts and input to a processing and recording system (or a processing and transmission system).

(Example) Hereinafter, an example of a television system according to the present invention will be described with reference to the drawings.

FIG. 1 is a diagram for explaining the relationship between the image display on the screen of the television system according to the present invention and the image display on the screen of the NTSC television system.

First, it is assumed that one horizontal scanning line A according to the present invention is expressed by n horizontal scanning lines of the NTSC system. here,
n is a positive integer. Furthermore, one screen of the television system according to the present invention can be converted into one frame period of the NTSC system (
2 field period). Here, m is also a positive integer. Therefore, one frame period of the image signal of the television system according to the present invention is m frame periods of the NTSC system image signal (hereinafter referred to as processed image signal). Now, as shown in FIG. 2, if one horizontal scanning period of the processed image signal S' of the NTSC system is lh, and one horizontal scanning period of the television system image signal S according to the present invention is IH, then the present invention One horizontal scanning period H and N related to
During one horizontal scanning period of the TSC method, IH=nXh
There is a relationship between

Since there is a processed image signal S' corresponding to 525 horizontal scanning lines in one frame period of the NTSC system, one frame period of the television system according to the present invention is 525 horizontal scanning lines.
It becomes 25xmXh. The image signal S of the -horizontal scanning period IH has an NTSC system processed image No. 11 S' of nB.
Since the horizontal scanning lines are formed in a nested manner, in the television system according to the present invention, the number of horizontal scanning lines existing in one screen is 525Xm÷n. However, since the part corresponding to the scanning line in the vertical blanking period of the processed image signal S' of the NTSC system is not used, there is a slight I! Becomes a pheasant.

The television system according to the present invention conceptually has a horizontal solution 1! ! ! power is n times that of the NTSC system,
If the resolving power in the mounting direction is also n times that of the NTSC system at the same aspect ratio, the overall resolving power will be m=n2 times that of the NTSC system.

In FIG. 2, the symbol is a horizontal scanning synchronization signal of If m fRI No. S by the television system according to the present invention, M is a horizontal blanking period, and the symbol is a horizontal synchronization signal of an NTSC image signal S'. M' indicates the horizontal blanking period.

The image signal S is output from the i-image section 1 shown in FIG.

This imaging section 1 functions as a line sensor section 2, and for example, scans a document 3 and optically reads image information. The image signal S is converted into n by an n-divided encoder 4.
The signal is divided, an apparent horizontal synchronizing signal M' is inserted, and the signal is converted into a processed image signal S'. That is, the image signal S is divided into n parts by the n-divided encoder 4, and during the effective period excluding the horizontal blanking period M' of the processed image signal S', the image signal S is divided into n parts (no. 8 is compressed, and the processed image signal S' is generated.Such signal conversion can be carried out by appropriately selecting write and read timings and sampling frequencies using a memory element.

The image signal S of the television system according to the present invention is
Since the vertical synchronization signal is output once every m frame period (2 field period) of the NTSC system, the NTSC
In order to convert the signal into the above system, it is necessary to divide one frame period (-vertical scanning period) of the image signal S by 2m and insert a vertical synchronizing signal. Reference numeral 5 denotes an m-division encoder for dividing the vertical scanning period into 2m and inserting vertical synchronization No. 13 of the NTSC system. In the NTSC system, the vertical synchronization periods are 1 to 21H and 262.5 to 283H, so signal division is performed using the effective period excluding these periods. Processed image signal S′ generated in this way
is exactly the same as the NTSC system image signal.

Here, the reason why it was decided to optically read the information on the material 3 using the line sensor section 2 is to ensure resolution in the horizontal direction. Note that in the television system according to the present invention, the frame frequency is NT! Since the frame frequency is lower than that of the 3C method, it is basically intended for reading objects in a stationary state.

In addition, the image signal S' during the horizontal scanning period of the point source immediately before the vertical synchronization period of the NTSC system is unstable depending on the equipment used, so it is preferable to avoid using it in order to prevent image disturbances. It is preferable that the number of horizontal scanning lines used is approximately 478, excluding several lines at the top and bottom of the screen.

Furthermore, when considering the operation of the image display device as the image display section of the television system according to the present invention, the me
Number of processed signals S' (hereinafter referred to as the number of effective scanning lines)
is preferably a positive multiple of 2n, and it is desirable to select the number of effective scanning lines as shown in the table below.

n 23456...Number of effective scanning lines 476474472470468
. . . Process ii1 lit it, No. S' is manually input to the processing recording system or processing transmission system via the advance signal adder 6, switch 7, or switch 8.947.

The processing and recording system has a processing and recording device 11, and this processing and recording device tt includes an inexpensive consumer device such as a VTR.
equipment, video discs can be used. Using this processing and recording device 11, image information is transferred to the VTR tape 12.
can be recorded and saved.

For example, if the VTR tape 12 is a still image, the number of frames for a one-hour tape in the NTSC system is 10.
It is 8000 frames. For 6 hour tape, 6
This is 48,000 frames. In the television system according to the present invention, it is possible to select integers n and m, and when a 6-hour tape is used, its capacity cannot be determined simply, but for simplicity, m=n2= 9, when processing and recording using the television system according to the present invention, the capacity is 72,000 frames.

By the way, although the consumer VTR tape 12 is provided with an audio track, it is generally not provided with an address track. However, since audio is generally not necessary for storing and managing materials such as documents, this audio track can be used as an address track to perform a quick search. Further, in the case of a stereo type VTR tape, the audio can be made monophonic and either the L channel or the R channel can be used as an address track.

Therefore, the address generator 13 is connected to the processing and recording device 11, and the address signal is transmitted to the VT along with the processed iI image No. 8 S'.
If recorded on the R tape 12, information can be searched using this address information.

On the other hand, the processing transmission system is an NTSC transmission transmission device 1.
It has 4. If this transmission transmission device 14 is used, it becomes possible to transmit and receive data using a normal line.

Furthermore, if a changeover switch 15 is provided between the imaging unit l and the processing recording system (or processing transmission system), and the changeover switch 15 is connected to a normal NTSC television camera 16, the title etc., and recorded on the VTR tape 12, the processed a-image signal S' can be subsequently recorded on the VTR tape 12. Additionally, videos can also be recorded.

In this television system, m frames of processed image 11 f2i1 S' correspond to one frame of image signal S, so when displaying an image, the starting point must be specified.The values of n and m are If it is small, it is possible to use the shift function of the horizontal and vertical synchronizing pulses to artificially manipulate the starting point until it becomes normal to obtain a normal screen. However, if a warning signal indicating the starting point is provided, this can be detected by a circuit and normal screen display can be performed.

The notice signal adder 6 serves to insert this notice No. 13 into the processing-side one-image signal S', and is provided between the processing recording system or the processing transmission system and the f-image imaging section.

When the switch 8 is opened, the processed image ffi number S' is inputted to the notice signal adder 6, and the notice signal W shown in FIG. 4 is added thereto. Here, the advance notice signal W is a pair, and the 22nd
Processed image No. 13 S" corresponding to the horizontal scanning line of the 3rd grain (or processed image signal S corresponding to the horizontal scanning line of the 490th grain)
=) and the processed image signal S' corresponding to the horizontal scanning line of the 224th main entrance (or processing II (*ffi No. S-) corresponding to the horizontal scanning line of the 491st main entrance are used, and this processed image signal S' has 0.5M) 12 signal components W1 and IMH
The two signal components W2 are superimposed, and the positions of the signal components WI and W2 are reversed between the first notice signal W and the good notice signal W. This makes it possible to distinguish between signal components that exist in nature.

Therefore, by opening the switch 18 and connecting the switch 7 to the warning signal addition 136 side, the warning signal W will be inserted into the processed image signal S'. In addition, in FIG. 4, C is Color Burst Toy No. 5.

Further, in the television system according to the present invention, n,
If the numerical value of m can be specified arbitrarily, by inserting the numerical values of n and m into the processed image signal S', images can be displayed using the television system according to the present invention. This is useful in some cases.

Therefore, in the television system according to the present invention, between the imaging unit 1 and the processing recording system (or processing transmission system),
An instruction signal adder 17 is provided for inserting an instruction signal indicating the numerical values of n and m.

When the switch 18 is connected to the notice signal adder 6 side, the processed AT signal S' into which the notice signal W has been inserted is input to the instruction signal adder 17. Further, when the switch 8 is closed, the switch 18 is connected to the switch 8 side, and the switch 9 is opened, the processed image signal S' to which the notice signal W is not inserted is input to the instruction signal adder 17. The instruction signal X instructing the numerical values of n and m is, as shown in FIG.
il signal S" (or the processed image signal S-> corresponding to the horizontal scanning line of the 492nd grain) and the processed image signal S" corresponding to the horizontal scanning line of the 231st grain (or the horizontal scanning line of the 493rd grain) The processed image signal S') is inserted into the processed image signal S') so that it can be distinguished from that in the natural world, similar to the preview signal W.

Note that switches 8 and 9 are closed and switch 7 is closed and switch 9 is closed.
When connected to the side, neither the preview signal W nor the instruction signal X is inserted into the processed image signal S'.

FIG. 6 is an explanatory diagram of a processing display system using the television system according to the present invention.

In FIG. 6, reference numeral 20 indicates a reproducing device forming a part of the processing display system, and 21 indicates a receiving transmission device.

The playback device 20 and transmission/reception device 21 are connected via a switch 22 to an NTSC image display device 23, 24 and a hard copy device 25, and are directly connected to an address reader 26. This address reader 26
is connected to the information retrieval system 27 to control the processing and display system. The image display device 23 functions to display images (including moving images) such as titles read by the television camera 16. In addition, the image display device 24
performs the function of displaying a specific portion of the III image information of the television system according to the present invention under the control of the display control circuit 28. As a result, even in the television system according to the present invention, which has a slow display speed, it is possible to quickly check whether the image information is of a necessary location.

The hard copy device 25 has the function of outputting image information for one screen according to the present invention, and the hard copy device 25 is provided with an n-divided decoder 29 and an m-divided decoder 30. Split encoder 4
It performs the inverse processing of
0 performs the reverse processing of the m-divided encoder 5, and functions to construct an image signal S for one screen from the m-divided image processing signal S'.

When constructing the image f3 S for one horizontal scanning period (IH), the horizontal blanking period M' including n-1 horizontal synchronization signals is removed. Furthermore, when the image signal S is horizontally constructed for -frame period, the vertical blanking period including m-1 vertical synchronization signals is removed. Therefore, the II image signal S is restored from which portions corresponding to the cuts made when forming image No. 13 S' have been removed.

Here, since the hard copy device 25 needs to have a horizontal resolution n times higher than that of the conventional hard copy device and a horizontal resolution m/n times higher than that of the conventional hard copy device 25, it is preferable to use a line printer type hard copy device.

The image display device as the image display unit of the television system according to the present invention uses a scan synchronization signal.Since the image display device of the revision system has a long vertical scanning period, the image display device as the image display section of the television system according to the present invention has a corresponding residual time (12 hours and n (Pi resolution When the values of m and n are small, this condition can be satisfied using a conventional NTSC system image display device, but when the values of m and n are small, When the size is large, it is difficult to satisfy this condition.

Although the embodiments have been described above, the television system according to the present invention is applicable to PAL system, SECAM system, H
D-TV (high television) system, ED-TV (
It can also be used with existing television systems such as the enhanced) system.

(Effects of the Invention) Since the television system according to the present invention is configured as described above, it is possible to easily achieve ultra-high resolution. Furthermore, since a conventional existing television system can be used, materials such as documents and drawings can be managed using an inexpensive system.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the relationship between image display on the screen of a television system according to the present invention and image display on the screen of an NTSC television system, and FIG. 2 is an @ image according to the present invention. A No. 8 schematic diagram showing the relationship between the signal and the NTSC image signal, FIG. 3 is a conceptual diagram of the processing recording system (processing transmission system) of the television system according to the present invention, and FIG. FIG. 5 is a schematic signal diagram of the processed image signal with the inserted instruction signal. FIG. 6 is a conceptual diagram of the processing display system of the television system according to the present invention. , is. 1...Imaging unit, 4...n-divided encoder 5...m
Divided encoder, 6... Notice signal generator 7... Instruction signal adder, 13... Address generator 29... N-divided decoder, 30... M-divided decoder S... l1if1
i! signal, S'...processed image signal W...notice signal,
X...Instruction signal Figure 1 Δ Engraving of the drawing (no change in content!) Figure 6 Figure 5 Procedure amendment style 21゜2゜3゜4゜Indication of the case Patent Application No. 111897 of 1999 Name of the invention Relationship to the television system amendment case Applicant name (35B) Tokyo Electric Co., Ltd. Agent Address: 135 Phone: 03-820-1811
Office Planet 6th floor, 1-14-3 Monzennakacho, Koto-ku, Tokyo 6゜7゜ August 14, 1999 (shipment date: August 29 of the same year) Subject of amendment Contents of drawing amendment Drawings 2, 4.8 As shown in the engraving of the figure (
(No change in content)

Claims (5)

[Claims] (1) comprising an imaging unit that reads image information and outputs an image signal, a processing recording system that processes and records the image signal as a processed image signal, and an image display unit that displays image information based on the image signal, The image signals of the imaging section and the image display section are adjusted such that one horizontal scanning period of the image signals of the imaging section and the image display section is n times as long as one horizontal scanning period of the processed image signal of the processing recording system. A scan synchronization signal for scanning the imaging section and a scan synchronization signal for scanning the image display section of the processing and recording system are set such that one frame period is m times as long as one frame period of the processed image signal of the processing and recording system. A television system characterized in that it is associated with a processing synchronization signal. However, n and m are positive integers. (2) comprising an imaging unit that reads image information and outputs an image signal, a processing transmission system that processes and transmits the image signal as a processed image signal, and an image display unit that displays image information based on the image signal, The image signals of the imaging section and the image display section are arranged so that one horizontal scanning period of the image signals of the imaging section and the image display section is n times as long as one horizontal scanning period of the processed image signal of the processing and transmission system. A scan synchronization signal for scanning the imaging section and a scan synchronization signal for scanning the image display section are transmitted to the processing and transmission system so that one frame period is m times as long as one frame period of the processed image signal of the processing and transmission system. A television system characterized in that it is associated with a processing synchronization signal. However, n and m are positive integers. (3) A notice signal adder for inserting a notice signal that foretells the start of the scanning synchronization signal into the processed image signal is provided between the imaging section and the processing recording system or the processing transmission system. 3. The television system according to claim 1 or claim 2. (4) An instruction signal adder for inserting an instruction signal for instructing the numerical values of n and m into the image signal during the processing is provided between the imaging section and the processing recording system or the processing transmission system. The television system according to claim 1 or 2, characterized in that: (5) The processing recording system or the processing transmission system includes an image display device and a display control circuit so that a part of the image information can be displayed using the image display device. television system.