JPS58103282A - Receiver of character graphic information - Google Patents

Abstract

PURPOSE:To eliminate the limination for the number of optional characters and at the same time to relax the waiting time, by providing the sufficient capacity to a memory for optional characters. CONSTITUTION:When a program code desiring a display is fed from a key input part 4, an interruption is applied to an arithmetic control part 2. Thus the program code is stored temporarily in a working memory part 6. Then the part 2 compares the program code previously stored in the part 6 with the program code that is presently fed from the part 4 to check the coincidence between these two program codes, When no coincidence is obtained, the comparison is repeated every time the program code of the part 6 is rewritten. While the packet information of the screen is read out of an optional character memory 12 when the coincidence is obtained. This packet information is then converted into the pattern information with reference to the data stored in a character type ROM13 as well as an optional character pattern in the memory 12 and then written to a display memory 11. This information is read out by the display address signal and then delivered 35 via a parallel-series converting part 9 and a TV signal synthesizing part 10.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a text/graphic information receiving device for receiving coded/transmitted text/graphic information. - Teletext multiplex broadcasting using code transmission, which was published on pages 85 to #I87 of the October 1960 issue of the Televising Society (Rattan 54m, No. 10), is attracting attention as a future text transmission method. The concept of this transmission method will be simplified and explained within the scope necessary for explaining the present invention. The teletext signal is the first shift #11m1 period (hereinafter referred to as V
This is a method of transmitting pulse-like signals in one to several horizontal scan lines within the BL (abbreviated as BL). Uke 4! The machine is equipped with a memory, and the VBL, that is, the Qin direct repetition period is 167 m.
A pulse signal sent intermittently with a cycle of 1 is stored in this memory, and character/figure information is generated on a cathode ray tube KN.

- One side of picture elements is 248 picture elements in the horizontal direction - 204 picture elements in the vertical direction
The total number of picture elements is 505?2 bits, approximately S1Z bits. 16 picture elements in the horizontal direction and 24 picture elements in the horizontal direction on the screen are converted into a 2-byte code and transmitted as a unit of one Kanji character. One horizontal scanning line corresponds to one transmission rate (packet) consisting of a 272-bit data section and a 24-bit synchronization section. This packet is one that transmits code information (character code packet) or one that breaks down character information that cannot be encoded into patterns and transmits it (external character pattern packet).
It is classified as having several aim data formats, such as
The entire 111i plane is transmitted in an average of 20 to 40 packets. Therefore, the time to transmit 1-plane is (20 ~ aO) x 1 hyc total 0.554 (#) ~
Q, 668 (JF) (0 or more, which is 1, is the signal concept of teletext broadcasting.

Now, in such a receiver for teletext broadcasting, for example, Kanji code patterns defined in the JISCb22b first level are stored in a dedicated memory (hereinafter abbreviated as ROM) K and are stored as character types. , the transmitted code information is reproduced as a kanji pattern with reference to this character type and displayed on the screen Km. Furthermore, in the case of transmitting characters other than these character types or parts of detailed figures, the above-mentioned external character pattern packet is used. This is done by transmitting a custom character pattern in advance in correspondence with a code, storing the custom character pattern code in a memory for storing custom characters (hereinafter referred to as the custom character memory) K provided in the receiver, and then transmitting the character code packet later. When this code is referenced within the system, the external character memory is referred to, and the external character pattern is reproduced and displayed on the 1m surface. Therefore, this woodcutter's receiver must have a memory for external characters, and its required capacity reaches its maximum value when the entire screen is transmitted as external characters. One character is transmitted in 2 packets (turn packets), so its capacity is 1°11i Number of picture elements per side ÷ Number of mm per character × Character pattern packet capacity × 2 - 50592 (bits) ÷ 584 (bits) × 54 (
Part-time job) x 2, 895? (Byte) 〈Approximately 9 kilobytes ・・・－・・・・・・・・・・・・
・・・・・・・・・(2) 0 Normal screens do not require such a large capacity, and only a few character packets are used at most. It had the same capacity as external character memory.

As a result, the external character code 1lKlIIl@ was created, which had the disadvantage that only a portion of the screen could be displayed when a fine screen was transmitted. Furthermore, as described above, if the receiver had external character memory for the eclipse lj planes, about 9 kilobytes of memory would be required, making the receiver as a whole expensive.

Also, as shown in equation (l), it takes about a5 seconds to transmit 11m1WJ, so if 40t1M screens are transmitted repeatedly, the screen will be transmitted every 20 seconds, and the user It also had the disadvantage of having a relatively long waiting time of up to 20 seconds.

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, eliminate IKl@ in the number of external characters, and make it possible to reduce waiting time. K provides a cheaper text and graphic information receiving device
be.

In order to achieve the above object, the present invention has in advance a custom character memory with a capacity sufficient to store even if the receiver transmits full-screen custom characters, and upon reception, incoming character and graphic information is sequentially stored in this special character memory. Remember. As a result, the external character memory stores the external character pattern and the character/graphic information from the time after a certain fixed period of time, so that external character processing and waiting time reduction can be realized at the same time.

The present invention will be explained in detail below with reference to FIGS. 1 and 2.

FIG. 1 is a block diagram showing an embodiment of the present invention.

In the first raAi'C, %1 is a character signal extracting section 2 which extracts a character multiplex signal from a television signal.
11tI control section; 5 is a program storage section that stores the control procedure for the arithmetic control section 20; 4 is a key section that manually selects a program for single character multiplex broadcasting; and 5 is a timing generation section that generates a timing signal for the entire device. , 6, the arithmetic control section 2 temporarily stores information for arithmetic control, 5 working memory section, 7
8 is a display timing generation unit that generates a display timing signal for reading out the display memory 15 in synchronization with the TV synchronization signal; 8 is an address signal sent to the display memory 11 from the arithmetic control unit 2 and an address signal from the display timing generation unit; An address switching circuit for switching and supplying ? is 1
A parallel/serial converter 10 converts the 8-bit parallel output signal read from the display memory 11 into a temporally serial signal, and converts and synthesizes the temporally serialized display signals into a television signal format. 0 display memory 1 which is a TV signal synthesis section
1 is a read/write memory with a pixel capacity of about 6 kilobytes for 11Iiai. Furthermore, 12 is a character memory for storing character patterns, and 15 is a character type ROM for storing character types such as Chinese characters. Further, 52 is a video signal input terminal to which the detection output signal of the television receiver arrives, 31 is a color subcarrier signal input terminal to which the color subcarrier signal of the television receiver arrives, and 55 is the horizontal synchronization signal of the television receiver. Reference numeral 34 indicates an incoming horizontal synchronization signal input terminal, 34 indicates a vertical synchronization signal input terminal of the television receiver, and 55 indicates an input terminal for inputting a vertical synchronization signal from which the character and graphic information read from the 1 display memory is converted into a TV signal and output. This is a display signal output terminal.

FIG. 2 is a conceptual diagram of the operation of this embodiment. In FIG. 2, the character multiplex signal is transmitted with time t, and time 1 .
1. ．． 1. ,..., the th planes A, B, (,"...
・Transmit each. Each side is composed of several tens of packets, and one side that requires external character pattern packets transmits the external character pattern packets together at the front. Temporary [1111+ Entire external character pattern packet of side A A3. If the other packets (i.e. character code packets) are A, conventionally only the A part was used as a memo for external characters! The memo for display is stored in 712, and the character code transmitted in the A-mayuzu section is used to reference the character type ROM 15 and external character memory 12! j11: Stored as a character information pattern. In this model, the memory 12 for external characters has a large capacity, and each packet transmitted in addition to the external character pattern (kerat) is stored one after another in transmission@, and the apparent transmission information at a certain time is stored. This is to reduce the waiting time by importing numbers, and to remove the limit on the number of external characters.

The details will be explained below.

At No. 1151x, from the video signal input manually from the video signal input terminal 32, only the character multiplex signal is extracted by the single character signal extraction section 1. At this time, when character signal extraction i11 extracts and holds 272 bits within one horizontal scanning period in VBL,
A signal path 52 KIllll is generated and notified to the arithmetic control section 2. The arithmetic control unit 2 immediately generates the address of the signal path 50 & C character signal extraction unit 1 and converts 272 bits into 1 byte (
8 bits) is taken into the arithmetic control section 2 via the signal path 51.

The tX calculation control section transfers and stores the character/graphic information of the single character multiplexed signal into the external character memory 12 via signal paths 50 and 51. Therefore, the storage order at a certain time t is the second
As shown in the diagram. Also, at this time, the program code included in each screen is stored in the work memo 96. For example, at time t in FIG. 2, the working memory 6 stores program codes for screens X, Y, and Z and their respective storage application addresses.

Next, a method for transferring character and graphic information from the external character memory 12 to the display memory 11 will be described. When a program code desired to be displayed is inputted from the key input section 4, the arithmetic and control section 2KM is connected via a signal path 52. Arithmetic control unit 2 ◆According to this interrupt K, the program code inputted from the key human power unit 4 via the signal path 50, 51 is taken in and the working memory unit 6
temporarily memorized. Subsequently, the arithmetic control section 2 compares the program code of the detail planes x, y, and z previously stored in the working memory section 6 with the program code inputted manually from the key manual section to see if they match. - If there is no code, the comparison is repeated every time the program code in the working memory 6 is rewritten every t.

On the other hand, if there is a match, the I (cut information) of the matching 1ili side is read from the external character memory 12, and the
1s memory data and memo for external characters! 712 and convert it into pattern information,
The pattern information is stored in the address to be displayed in the display memory 110 via the address switching circuit 8. The written information is transmitted to the tying signal supplied from the tinging generation circuit 5 via the signal path 55 and to the input terminals 53 and 5.
The signal is read out by the display address signal generated by the display tying generator 7 from the horizontal and *serial synchronization signals inputted from the parallel-to-serial converter 9 and the TV signal synthesizer 1.
0&C, the signals are converted and synthesized into a television signal format and output to the output terminal 35.

At this time, additional storage can be stopped in the one-sided area displayed in the external character memory 12, and the remaining area can be used to alleviate the waiting time.

For example, in the case of a receiver equipped with 10 kilobytes of memory as memory for external characters, memory capacity for external characters ÷ 1 packet capacity x 1 packet transmission time - 10 x 1024 (bytes) ÷ 34 (bytes) x
1+lL7 (77L#) −5050(ms) ・・−・−
・-(31 and approximately 5 seconds of waiting time can be alleviated.Also, even if the entire screen is sent in non-standard characters (2)
As stated in the formula, since it is 9 kilobytes, it is possible to store all custom character patterns.

Furthermore, since one memory serves both functions, it can be constructed at a lower cost than when memories for these two functions are constructed separately.

Conversely, it is also possible to store and use external character patterns in a memory provided for alleviating waiting time, as described above.

Furthermore, in A-1 and above, we have talked about the transmission method that transmits the external character pattern as it is when transmitting the pattern.
It is obvious that the present invention is also effective for transmission methods such as FAX, which uses compressed transmission of frequently used patterns to send external characters.

As described above, according to the present invention, by providing a sufficient memory capacity for the external character memory in a device that receives single-character graphic information, it is possible to eliminate the number of external characters (111@) and to reduce the waiting time. The performance of the single character graphic information receiving device is improved. It is also more economical than using separate memories to accomplish each function.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a diagram illustrating the operational conceptual diagram of FIG. 1. 2...... Arithmetic processing unit 12...
... Memory for external characters 15 ... ROM for woodcutter characters Patent attorney Susuki 1) Toshiyuki 1st sword

Claims (1)

[Claims] A receiving device that receives character/graphic information including a character/graphic pattern, an external character code specifying the character/graphic pattern, and a valid code specifying a predetermined character/graphic pattern, and displays the character/graphic pattern, When the character/graphic information read from the temporary storage means for temporarily storing the character/graphic information, the character type/storage means in which a predetermined character/graphic pattern is stored, and the temporary storage means is an external character code, Control means for converting the character/graphic pattern stored in the temporary storage means, or in the case of a defined code, the character/graphic pattern stored in the character type storage means into display data and storing it in the display memory RK. The temporary storage means has a capacity capable of storing all of the displayed character and graphic patterns stored in the display storage means even when transmitted as character and graphic patterns together with the external character code, and Characters characterized in that when a part of the display character and figure pattern stored in the means is transmitted as a character and figure pattern together with the external character code, the character and figure information that arrives one after another is stored in the temporary storage means. Graphic information receiving device.