JPH0462092B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention is directed to a text/figure screen that can receive encoded text/figure information and additional sound information, display a text/figure screen, and reproduce additional sound. This invention relates to display devices.

[Background of the invention]

Text and graphics information services that can encode and transmit a screen consisting of text and simple graphics, receive it on a text and graphics display device, and reproduce the text and graphics screen include, for example, multiplexing text and graphics information onto a television signal. These include text broadcasting, which transmits text and graphic information over telephone lines, and videotext, which transmits text and graphics information over telephone lines. As one of such text and graphic information services, it not only transmits text and graphic information, but also, for example, the Technical Report of the Television Society, Vol. 7, No.
May 2013) As described on pages 67 to 72, an additional sound playback device that encodes additional sounds such as simple music or sound effects and transmits them together with text and graphics information, and is connected to or built into the text and graphics display device. There are known devices that can reproduce this additional sound.
FIG. 1 is a block diagram of a conventional character/graphic display device having such an additional sound reproduction function. In FIG. 1, 1 is a signal receiving circuit for receiving text/graphic information and additional sound information, 2 is a memory writing circuit for recording the received text/graphic information and additional sound information in memory 3, and 4 is a memory. 3 is a data readout circuit that sequentially reads out text and graphic information or additional sound information; 5 is an additional sound information identification circuit that identifies that the read data is additional sound information; and 6 is an additional sound information circuit (not shown). A data transfer circuit for transmitting data to the sound reproduction device; 7 a character and graphic information identification circuit for identifying that the data read by the data reading circuit 4 is character and graphic information; 8 a whole screen of the character and graphic information; A display mode setting circuit that erases the previous screen, sets the background color, etc. according to information regarding control of the display. Reference numeral 9 denotes a code decoding circuit 10 for decoding read character/graphic information, and a display memory 12.
A display for setting a writing address for character/figure pattern data in the , or reading out pattern data corresponding to the character/figure code decoded by the code decoding circuit 9 from the nonvolatile character/figure pattern memory 11 and writing it to the display memory 12. A memory write circuit 13 is a display memory read circuit for reading out the contents of the display memory 12 and displaying it on the screen, and other circuits not directly related to the explanation of the present invention are omitted. In the conventional character and graphic display device shown in FIG. 1, the received character and graphic information and additional sound information are recorded in the memory 3 in the order in which they are received.
Data is processed in the order in which it was recorded, ie, in the order in which it was received. Therefore, this conventional character/graphic display device has the following disadvantages. In other words, the order in which one piece of screen information is transmitted is normally that text and graphics information is sent first, followed by additional sound information, but in this case, the conventional text and graphics display device shown in FIG. First, the character/figure screen is displayed, then the additional sound information is processed, and the additional sound information is transferred to the additional sound playback device by the data transfer circuit 6. Only after this transfer is completed, the additional sound information is processed. The playback device will start playing the additional sound. However, the time required to transfer the additional sound information is naturally proportional to the amount of data of the additional sound information. Therefore, in the case of additional sound information with a small amount of data, the playback of the additional sound will start immediately after the character/figure screen is displayed, whereas in the case of additional sound information with a large amount of data, the reproduction of the additional sound will start immediately after the text/figure screen is displayed. After the information is displayed, the reproduction of the additional sound will start after a period of several seconds or even five seconds in some cases. In this way, depending on the amount of data of the additional sound information, the time required for the additional sound to start playing after the text/graphics screen is displayed varies considerably, causing users to worry that the additional sound playback device may have malfunctioned. There were negative effects such as giving rise to misunderstandings.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the conventional character and graphic display devices described above, and to provide a character and graphic display device in which the display of a character and graphic screen and the playback of additional sounds start almost simultaneously, regardless of the amount of data of additional sound information. It's about doing.

[Summary of the invention]

In order to achieve the above object, in the present invention, when processing character/graphic information and additional sound information recorded in a memory, the presence or absence of additional sound information is first identified, and if there is additional sound information, the additional sound information is is transferred from the character/figure display device to the additional sound playback device, and after detecting that this transfer is completed, processing of the text/figure information is started, so that the display of the text/figure screen and the playback of the additional sound are almost simultaneously performed. This allows you to start.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG. In FIG. 2, reference numeral 14 denotes a writing end detection circuit for detecting that the recording of character/graphic information and additional sound information into the memory 3 has been completed; 15 denotes an additional sound information identification circuit for identifying the presence/absence of additional sound information; 16; 17 is an additional sound information reading circuit that reads additional sound information from the memory 3; 17 is a transfer end detection circuit that detects that the additional sound information has been transferred to an additional sound playback device (not shown); 18 is a transfer end detection circuit that reads characters from the memory 3; This is a character/graphic information reading circuit for reading graphic information, and other symbols are the same as in FIG. 1. In the character and graphic display device shown in FIG. 2, when processing the character and graphic information and additional sound information recorded in the memory 3, the presence or absence of additional sound information is first identified by the additional sound presence/absence identification circuit 15. . When it is determined that there is additional sound information, the additional sound information reading circuit 16 is driven, the additional sound information is read out from the memory 3, and is transferred to the additional sound reproduction device by the data transfer circuit 6. After the transfer end detection circuit 17 detects the end of the transfer of the additional sound information, the text/graphic information reading circuit 18 is driven to process the text/graphic information and display the text/graphic screen. On the other hand, when the additional sound presence/absence identification circuit 15 identifies that there is no additional sound information, the additional sound information reading circuit 16 is not driven, and the character/graphic information reading circuit 18 is immediately driven to start displaying the character/graphic screen. be. Therefore, in the text and graphic information display device shown in FIG. 2, if there is additional sound information, the reproduction of the additional sound and the display of the text and graphic screen are started almost simultaneously.
Note that the additional sound presence identification circuit 15 may identify the presence or absence of additional sound information from the data recorded in the memory 3, but the memory writing circuit 2 may identify the presence or absence of additional sound information when writing data to the memory 3. You may. Furthermore, the writing completion detection circuit 14 is a circuit for starting processing after the recording of character/graphic information and additional sound information into the memory 3 is completed, but the processing does not necessarily start after the recording into the memory 3 is completed. However, the process may be started at the same time as recording into the memory 3 is started, without providing the write end detection circuit 14. Further, the transfer end detection circuit 17 may detect the end of transfer by identifying the code indicating the end of the additional sound information string, or alternatively, if the total amount of data of the additional sound information is known, the transfer end detection circuit 17 may measure the amount of transferred data. The end of the transfer may be detected by this, or the end of the transfer may also be detected using data other than the additional sound information read out following the additional sound information.

FIG. 3 shows another embodiment of the present invention.
In FIG. A, 19 is a central processing unit (hereinafter abbreviated as CPU) such as a microcomputer, 20 is a non-volatile program memory in which a processing program is recorded, and other symbols are the same as in FIG. Also, FIG. 3B shows the program memory 20
3 is a flowchart showing a part of the processing of the processing program recorded in . In the character/figure display device shown in FIG. 3, the present invention is realized by converting the functions of each circuit shown in FIG. be. That is, the received text/graphic information and additional sound information according to the flowchart shown in FIG. In some cases (), the processing of the text and graphics information is started after all of the additional sound information has been transferred by processing, so that the reproduction of the additional sounds and the display of the text and graphics screen are started almost simultaneously. Note that in FIG. 3B, processing is for starting the processing after the recording of the character/graphic information and the additional sound information is completed, but the start of the processing after the processing does not necessarily mean that the recording to the memory 3 is completed. For example, the processing may be performed as a separate processing by an interrupt, and the subsequent processing may be started at the same time as recording to the memory 3 is started. However, in this case, if the data to be processed in the process has not yet been recorded in the memory 3, it is necessary to add the process of waiting until the data is recorded in the memory 3. Further, the process may identify the presence or absence of additional sound information from the data recorded in the memory 3 after all data has been recorded in the memory 3, but the process may identify the presence or absence of additional sound information when recording the data in the memory 3. Good too.

FIG. 4 shows another embodiment of the present invention, and the reference numerals are the same as in FIG. 1 or 2. In FIG. The character/figure display device shown in FIG.
This is a case where the additional sound playback device (not shown) is also equipped with a memory for storing additional sound information.
If the received signal is additional sound information, it is transferred as is to the additional sound reproduction device. The character/graphic display device of FIG. 4 has the advantage that the capacity of the memory 3 is small, and the additional sound reproduction device can receive additional sound information even while the additional sound is being reproduced.

In the above explanations of FIGS. 2, 3, and 4, we did not particularly explain the start of playback of additional sound in the additional sound playback device. As soon as all of the additional sound information has been received, playback of the additional sound may be started. Alternatively, an additional sound playback start signal generation circuit may be provided, the text/graphic display device may drive this additional sound playback start signal generation circuit to generate an additional sound playback start signal, and upon receiving this signal, the playback of the additional sound may be started. You can also do this. With such a configuration, it is also possible to start playing the additional sound at any time during the display of the text/graphics screen. Conversely, a circuit is provided to indicate the status of the additional sound playback device, and the display process is changed depending on the state of the additional sound playback device in the display processing of text and graphic information.For example, the display process is interrupted until the performance of the additional sound is finished, and the It is also possible to restart the display process upon completion of the process.

[Effects of the Invention] As explained above, according to the present invention, playback of the additional sound is started after the character/graphic screen is displayed due to the amount of data of the additional sound information included in the conventional character/graphic display device. It is possible to eliminate the disadvantage that the time until the end of the display changes, and to realize a function in which the display of the character/figure screen and the reproduction of the additional sound always start almost simultaneously, resulting in the effect of improving the performance of the character/figure display device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a conventional character and graphic display device, FIG. 2 is a block diagram showing one embodiment of the present invention, and FIGS. 3A and B are block diagrams and processing showing other embodiments of the present invention. program flowchart,
FIG. 4 is a block diagram showing another embodiment of the present invention. 3...Memory, 12...Display memory, 15...
Additional sound presence/absence identification circuit, 16...Additional sound information reading circuit, 17...Transfer end detection circuit, 18...Character/graphic information reading circuit, 19...CPU, 20...Program memory.

Claims (1)

[Claims] 1. In a character and graphic display device that has an additional sound reproduction device and is capable of receiving character and graphic information accompanied by additional sound information and reproducing the additional sound information and character and graphic information, an addition device that identifies the presence or absence of additional sound information. sound presence/absence identification means; transfer end detection means for detecting the end of transfer of the additional sound information to the additional sound playback device; 1. A character and graphic display device comprising: a control means for starting display processing of character and graphic information after detecting the character and graphic information.