JPS6070488A - Moving picture display - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a moving image display device that displays images on a cathode ray tube using an image data memory.

[Technical background of the invention]

As a display device using a television receiver, there is a device that converts digital data read from an image data memory into parallel to serial, converts it into a video signal, and displays the video on a cathode ray tube screen. Various methods have been developed to store digital data in the image data memory. There are ways to remove and accumulate things.

When enough data necessary for display has been accumulated in the image data memory, the digital data is read out and displayed on the cathode ray tube screen.In this case, a device that can handle both still image data and moving image data is used. has also been developed.

The device shown in FIG. 1 has been developed to display a moving image within a still image. Still image data is stored in a still image memory 15, and moving image data is stored in a moving image memory 19.

Reference numeral 11 denotes an oscillation circuit that generates a clock that is the basis of the display circuit, and the clock obtained from this circuit is input to the timing pulse generation circuit 12. This timing pulse generation circuit 12 generates various timing pulses necessary for display and synchronization pulses for synchronizing with a monitor television receiver when displaying data on a television screen.

For the still image memory 15, a vertical counter 13 and a horizontal counter 14 are used to specify the address.
Similarly, a vertical direction counter 1 for address designation is also provided for the moving image memory 19.
7. A horizontal counter 18 is attached thereto.

Here, the counting and control pulses generated by the timing pulse generation circuit 12 are applied to the vertical counters 1B and 17 and the horizontal and directional counters 14 and 1B, respectively.

Furthermore, a grise pull counter is used for the vertical direction counter 17 and horizontal direction counter 18 that designate the address of the moving image memory 19. ◇The data read out from the still image memory 15 and the moving image memory 19 are respectively input to the parallel-to-serial conversion circuit 16.20 and converted into serial data. It is synthesized by the synthesis circuit 2. The composite data is then input to a video signal system circuit and displayed on the screen.

[Problems with background technology]

According to the above-mentioned conventional moving image display device, the moving image display device 1
9, a vertical counter 17 and a horizontal counter 18, which are grise pull counters, must be used, and the circuit configuration is complicated. In particular, when integrated into an integrated circuit, many control timing pulses are required for the vertical force/direction counter 17 and the horizontal direction counter 18, making it unsuitable for miniaturization.

[Purpose of the invention]

This invention was made in view of the above circumstances, and by eliminating the grise pull counter that was associated with the conventional moving image memory and using it as a decoder, the circuit configuration can be simplified and it is effective for integrated circuits. The purpose of the present invention is to provide a mobile image display device.

[Summary of the invention]

In this invention, in order to specify the address of the moving image memory 19, the vertical and horizontal counters 13 and 14, which specify the address of the still image memory 15, are decoded in accordance with the reset data. The above objective is achieved by using horizontal decoders 23 and 24.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings. Second
The figure shows one embodiment of the present invention. In the case of the present invention, count data CDV of a vertical counter 13 and a horizontal counter 14, which are provided attached to a still image memory 15 and specify addresses of this memory, is shown. , CDH are further input to a vertical address decoder 23 and a horizontal address decoder 24, respectively.

The vertical address decoder 23 and the horizontal address decoder 24 are provided for specifying addresses of the moving image memory 19. The vertical address decoder 23 and the horizontal address decoder 24 can generate constant address designation data according to the input count data CDV and CDH. However, in this case, the decode mode can be switched by the decode mode designation signal from the microcon beater 22. When the decoding mode is switched, for example, the amount of change in output with respect to input data is changed, and the amount of movement of the moving image can be switched.

Reference numeral 11 denotes an oscillation circuit that generates a clock, which is the basis of the display circuit, and the clock obtained from this circuit is input to the timing signal generation circuit 12. This timing pulse generation circuit 12 generates various timing pulses necessary for display and synchronization pulses for synchronizing with a monitor television receiver when displaying data on a television screen.

In the case of still image display, the vertical direction cursor is reset for each field, counts pulses for each horizontal period, and specifies the vertical address of the still image memory 15. Further, the horizontal direction counter 14 is reset by a pulse for each horizontal period, counts the ie pulse corresponding to the face tree, and specifies the horizontal direction address of the still image memory 15 based on the count data. As a result, the parallel data addressed and read by the count data from the vertical counter 13 and the horizontal counter 14 is input to the serialization circuit 16 and converted into serial data, and then passed through the synthesis circuit 21. Output to the video signal path.

In the still image display mode, data in the still image memory 15 is read out, and data in the moving image memory 19 is not read out. Therefore, in this case, the vertical decoder 23
, the horizontal decoder 240 input gate is closed by a control signal from the microconbeater 22, for example, and the addressing is all zeros.

Next, when displaying a moving image so as to be superimposed on a still image, data for the moving image is read from the moving image memory 19.

In this case, the vertical and horizontal addresses of the moving image memory 19 are the vertical counter 13 and the horizontal counter 1.
This is specified by the vertical decoder 23 and horizontal decoder 24 which decode the count data of 4. The vertical decoder 23 and the horizontal decoder 24 calculate (decode) each brisset data and each input count data from the microcomputer 22 and use them as address designation data for the moving picture memory 19. To explain the preset data from the i-microcomputer 22, for example, if the vertical address of the still screen is outputting the specified data of the 12th line, and the reset data is W, then it will move directly to the 12th line. If the preset data is W+1, a moving image is displayed on the 13th line. The same applies to the horizontal direction. In other words, the reset data and the still image memory 15
The result obtained by simply mechanically adding the address data of .

It is preferable that the variable ratio of the preset data, its availability, and the variable timing for each field can be changed by program switching or user designation on the i-microcomputer 22 side. FIG. 3 shows a situation in which the moving image 26 moves on the still image 25. When moving in the direction of the arrow shown by the solid line, the preset data in both the vertical and horizontal directions are changed, as shown by the broken line. When moving in the direction of the arrow, preset data in the horizontal direction is stored and preset data in the vertical direction is varied. The moving image data read out from the moving image memory 19 is converted into serial data by a parallel-to-serial conversion circuit 20, and is synthesized with still image data by a synthesizing circuit 21.

〔Effect of the invention〕

According to the invention described above, the vertical decoder 23 and the horizontal decoder 24 are used as means for reading data from the moving image memory 19 to display a moving image on a still image. The decoder only performs mechanical calculation (decoding) of the reset data and the count data from the still image memory, and uses, for example, a read-only memory ROM or a random access memory IJ RAM. The use of RAM also provides flexibility in changing the movement situation. By using this more advanced decoding means, there is no need to use counters or timing noises as in the past, and it is possible to significantly reduce the size of integrated circuits and improve the convenience of design and manufacturing. be able to.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing a conventional moving image display device, FIG. 2 is a configuration explanatory diagram showing an embodiment of the present invention, and FIG. 3 is an explanatory diagram showing a moving image display situation. 13... Vertical direction counter, 14... Horizontal direction counter, 15 - Memory for still images, 19... Memory for moving images, 23... Vertical direction counter, 24... Horizontal direction counter.

Claims (1)

[Scope of Claims] A still image memory storing still image data for displaying still images on a cathode ray tube screen, and a still image memory corresponding to the vertical and horizontal directions of the cathode ray tube screen. a vertical counter and a horizontal counter that add the address designation r-date, and a moving image is displayed superimposed on the still image displayed on the screen based on the still image data read from the still image memory. In order to do this, in a moving image display device having a moving image memory storing moving image data, as a means for generating data specifying the vertical and horizontal addresses of the moving image memory, respective microcomputer It is characterized by comprising a vertical decoder and a horizontal decoder which obtain decoding according to the presets by adding vertical and horizontal preset data and adding count data from the vertical counter and the horizontal counter, respectively. A mobile image display device.