JPS62274872A - Still picture transmitter - Google Patents

Abstract

PURPOSE:To improve an operability so as to set a time while viewing the output time of a signal for carrying out a preprocessing by presetting the constant of a signal for performing the preprocessing and displaying this set value on a monitor. CONSTITUTION:When a transmission constant setting switch SW5 is turned on, a control circuit 106 writes a characters for setting respective constants on a memory 102 and displays them on a monitor 104. Then, after a constant selection switch 1SW6 or a constant selection switch 2SW7 is pressed down to move a cursor to a desired constant setting position, a value increasing switch SW8 or a value reducing switch SW9 is pressed down to change to a desired coefficient value. Then, in order to instruct the setting change of the respective constants to a CPU 106, the transmission constant setting switch SW5 is turned off. Constant data formed in the CPU 106 is stored in a memory of a battery backed up data storing part and is not lost at the time of interrupting a power source.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention (Field) <Industrial Application Field> The present invention is a method for sequentially reading one screen worth of still image signals played from a video floppy, for example, in accordance with the transmission rate. The present invention relates to a still image transmission device.

<Prior Art> FIG. 1 is a schematic diagram showing a still image transmission mode related to the present invention.

A is, for example, a period during which a phase signal is transmitted, which is generated at a time interval during which data for one horizontal line of a video signal is transmitted. This is a synchronization period for more accurately obtaining a video signal for each line of a video period, which will be described later.

B is a reference signal period corresponding to the maximum brightness signal (white peak signal) of the subsequent video period, and the modulation format of the electric transmission signal is A.
For M modulation, a signal with an amplitude equivalent to the white signal, F
If it is M modulation, it will be a signal with a frequency corresponding to a white signal. This allows reception pre-processing to be performed to reliably correct the received video signal level regardless of the state of the transmission line. For example, it is possible to set the degree of boost of the amplifier on the receiving side.

Conventionally, in this type of device, the time for transmitting signals for pre-processing the white signal, such as the above-mentioned phase signal, is predetermined, and the transmission/reception sequence is determined in advance after the phase signal and white signal are obtained. It was set so that the sequence would proceed to the next one after a certain amount of time had elapsed. Moreover, the signals used for preprocessing such as phase signals and white signals differ depending on the type of device.

Therefore, in conventional devices of this type, the output time of the phase signal and the white signal was divided into several stages depending on the position selected by the DTP switch, and the user determined the output time by selecting the appropriate one. .

<Problems to be Solved by the Invention> In conventional devices such as those described above, the more types of devices to be sent to, the more information needs to be set. Due to this setting, the number of DTP switches described above increases, resulting in a problem that the operability becomes very poor. The present invention aims to solve such problems.

<Means for Solving the Problems> In order to achieve two objects, the present invention provides a still image transmission device that electrically transmits still image information together with a signal that performs preprocessing for transmission. The apparatus includes means for presetting a constant of a signal for performing the process, and means for displaying the set value on a monitor.

Effect> You can set the output time of the signal for pre-processing shown on the monitor.

<Example> The present invention will be described in detail with reference to FIG. 2. Reference numeral 100 is an image input unit that receives a playback signal from a video floppy, an externally input television signal, etc., which is separated into three primary color signals, for example. The object is tentalized by the A/D converter 101 and stored in the frame memory 102 for each color (not shown).The contents of the frame memory 02 are stored in the D/A converter 103
After being converted into an analog signal, the signal is supplied to a monitor circuit 104 and displayed. The address of the data in the frame memory 102 is set by a control circuit 106, and read/write control is performed.

A transmission timing generator 107 is connected to the control circuit 106, and the time is set by the control circuit 106 according to the transmission data interval described later, and the transmission timing generator 107 is sent to the control circuit 106 at the set time interval. This is what is output.

Further, the control circuit 106 is controlled by the switch control circuit 105 to switch and transmit the phase signal, white signal, and video signal described above according to the obtained signal.

The switch control unit 105 includes a transmission constant setting switch SW.
5, constant selection switch SW6, constant selection switch SW7
, a value increase switch SW8, and a value decrease switch SW9 (destination selection switch 5W10) are connected, and each parameter is set according to the flowchart described later.

The data from the frame memory taken into the control circuit 106 is converted into an analog signal by the D/A converter 108, modulated in a form suitable for electric transmission, such as AM modulation, FM modulation, etc., and then sent to the electric transmission line via the amplifier 110.] 11 (for example, a telephone line).

FIG. 3 is a diagram for explaining the transmission sequence of this embodiment.

When the transmitting side starts transmission, it sends a transmission start signal to the receiving side, and the receiving side returns an answer signal to the transmitting side when it is ready to receive. In response to this, the transmitting side transmits the above-mentioned phase signal, and when the receiving side completes synchronization with this phase signal, it returns an answer signal. Furthermore, the transmitting side transmits a white signal. When the receiving side completes level adjustment using this white signal, it returns an answer signal again. continue,
The transmitting side transmits a video signal (R signal), and when the transmission is completed, the receiving side returns an answer signal. The above is the transmission sequence for one color of light, and thereafter, the transmission of the G signal and B signal is performed in the same sequence.

FIG. 4 shows a display example for setting the various constants described above on the monitor 104 (see FIG. 2).

Here, FRQ is the transmission frequency and the frame memory 10
2, the frequency APR of the carrier wave used when reading and modulating data is the frequency (H2) of the answer signal sent from the receiving side, and if it is a transmission device with a transmission function, the answer signal sent to the sending side. It is also the frequency of

PHT is the transmission time of the phase signal (seconds), WHT is the transmission time of the white signal (seconds), ANT is the transmission time of the answer signal (seconds) (not necessary for a transmitter only), and LBR is the time returned from the receiving side. The non-operating time (seconds) from receiving the next answer signal to transitioning to the next operation, SPD is the transmission data rate (baud) when considering digital transmission, which is different from this embodiment, and is analog-only. It is not necessary for machines.

FIG. 5 is a flowchart showing the procedure for setting each constant shown in FIG.

First, it is determined whether or not the transmission constant setting switch SW5 is turned on (SO). If it is turned off, the video signal is displayed on the monitor 104 via the memory 102, and when SW5 is turned on, the control circuit 106 Characters for setting each constant are written on the screen, these are displayed on the monitor screen, and the cursor counter is set to 1 (steps Sl and S2). The cursor counter indicates the position in the vertical direction of the screen. For example, the position of FRQ in Figure 4 is 1, S
Assume that the PD position is 7. Next, constant selection switch l5
Press W6 or constant selection switch 2SW7 to move the cursor to the desired constant setting position (step S
3→S8→S10, step S4→S9→510).

After moving the cursor to a desired position, the value increase switch SW8 or the value decrease switch SW9 is pressed to change the coefficient value to a desired value (steps S5→S12, steps S6→513).

Next, in order to instruct the CPU 106 to change the settings of each constant, the transmission constant setting switch SW5 is turned off (step 5O-3ll).

The constant data formed by the CPU 106 is stored in a battery-backed data storage memory (or EEPRO).
M: (none of which are shown), and will not be lost even when the power is cut off.

As explained above, according to this embodiment, constants such as the transmission time and transmission rate of synchronization signals, reference level signals, etc. can be set by software, and are stored in nonvolatile memory, so that images can be It is no longer necessary to set each of the above constants each time transmission is performed, which has a great effect on immediacy and reduces the burden on the user. Furthermore, operability can be further improved by setting a plurality of constants depending on the destination and making it possible to select these as appropriate.

That is, in this embodiment, the destination setting switch 5WIO
is provided so that a plurality of sets of setting data shown in FIG. 4 can be set. For example, when the destination setting switch 5WIO is tilted toward Company A, each constant set in the procedure explained in FIG. 5 is written in the area corresponding to Company A of the nonvolatile memory. Similarly, if 5WIO is on the side of company B or company 0, it will be written to the area corresponding to company 8 or company 0 in the nonvolatile memory.

Furthermore, at the time of transmission, the transmission will be performed according to the procedure shown in Figure 3 as described above, but in such a case, the phase signal, white signal, and other data for electrical transmission shown in Figure 4 will be transmitted. is automatically read out and set according to the selection of the other party of the switch 5w1o.

Therefore, according to this embodiment, the constants such as the output time of the phase signal, white signal, and answer signal that are output when performing transmission are automatically set according to the operation of the switch 5WIO. Even if the reception is performed sequentially to different types of receivers, such as transmitting to one receiver and then transmitting to receivers of eight companies, the 5w1o
Each constant can be set simply by the operation of
This method has the advantage that it is much easier to perform than a method using a switch.

In the embodiment of the present invention described above, the signals to be preprocessed for transmission, such as the transmission frequency, answer frequency, phase signal output time, white signal output time, answer signal transmission time, etc., are set in advance. Switch SW as a means
5 to 9 and the control circuit 106 that executes the flow shown in FIG. 5 by means of the switches, it is needless to say that other setting means, such as input using a numeric keypad, may be used. .

Further, although the control circuit 106 reads out the frame memory in which the set values are stored and displays them on the monitor 104 as a means for displaying the set values on the monitor, the set values may be written in a dedicated memory.

<Effects of the Invention> As described above, according to the present invention, when setting the constant of a signal to be preprocessed for transmission, the setting can be easily performed while watching the monitor.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a still image transmission data format according to the present invention, FIG. 2 is a block diagram showing an embodiment of a still image transmission device to which the present invention is applied, and FIG. 3 is a still image according to the present invention. Figure 4 is a diagram showing an outline of the electrical transmission flow; Figure 4 is a diagram showing an example of monitor display in this embodiment;
The figure is a flowchart showing the procedure for setting various constants, 100... Image input section, 101...
...A/D converter, 107...Transmission timing generator, 108...D/A
Converter, 109...Monitor, 105...Switch control section, (transmission @4
! jl! ])
(Yumi and 4 and mD 3rd concave monitor screen Figure 4

Claims (3)

[Claims] (1) A still image transmission device that transmits still image information together with a signal that performs preprocessing for transmission, comprising means for presetting a constant of the signal that performs the preprocessing, and displaying the set value on a monitor. A still image transmission device characterized by comprising: means. (2) The still image transmission apparatus according to claim 1, wherein the signal subjected to the preprocessing is a phase signal or a reference level signal. (3) The still image transmission apparatus according to claim 1, wherein the means for setting the constant of the signal is means for storing the output time of the signal in advance.