JPS5857877A - Method and device for multiplex information television - 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 The present invention relates to selectively available video, audio and document services in the form of video signals.

Ordinary television broadcasting is well known. The video signal provides a continuously moving m@, and another audio channel provides the accompanying audio.

Apparatus for providing a single television screen as a still image is available for "still motion" broadcasts, which are often used in television sports coverage.

Recently, a combination of a small still image and a printed document on a single television screen or the like has become available in the United Kingdom under the trade name of Solestel. A conventional narrowband telephone SR data path carries highly compressed digital data encoded with 111g/I information. actual lI
igI! K requires about 10 seconds to assemble. The receiver requires digital memory for storage of data and processing logic to decompress the data.゛This system is described in 147 of the proceedings of the Videotex 81 International Conference and Exhibition held in Toconte, Canada from May 20th to May 22nd.
Clark and Fenn, “19
"Technical Development of the British Press Teleservice from March 1980 to March 1981".

Covered in "Teletext in the United States," July 1981, pages 602-61o.

Leitzen basically discloses the operating characteristics of each system and considerations for standardization. All of his systems use one or several television scan lines during the blanking period to transmit digital information and reproduce printed documents.

The present invention provides a plurality of services according to selection via one video transmission path at video speeds.

Normally, the Eirin transmission line is brought to the home through a television transmitter, TV station, or TV station.

At the transmitting station, a selection of regular television programs, still image ``burst'' video screens, ``compressed audio'' screens, and [digitally transmitted alphanumeric print major portions] are available.

At home, it is possible to select and operate the desired service from a simple control panel.

Methods and apparatus for conventional television broadcasting are well known. Still image "Burst"
For methods and apparatus for video screen services, see 1.
U.S. Patent Application No. 249, filed April 1, 981,
It is described in No. 792. A method and apparatus for "compressed audio" services is described in U.S. Patent Application No. 264,744, filed May 18, 1981. A method and apparatus for the "Television Digital Data Screen" service is described in U.S. Patent Application No. 295,955, filed August 24, 1981. The inventors of the above patent applications including this patent application are the same.

Complete static #jJgI in 1/3o seconds, or 10 seconds of compressed audio in another second, or another 1/3
To send a printed document in o seconds, k uses four broadband television channels.

A simple control panel allows you to select the type of service you request and control the selected service, such as ``Next Tsuji'', ``Previous Page'', ``
Presses for "Yes" (accepting or accepting a question), "No" (rejecting a question), "Index" (objects), and "Concatenation" (adding the same object #IC), etc. It has a button.

The control board commands commands through a microprocessor having both ROM and RAM memory, and by interconnecting multiple available services to the microprocessor, allowing for more than two types of services, rather than two types of services. It is more likely that the That is, for example, combinations such as an image and a document, an image and audio, and a document and audio.

Of course, we provide equipment for six types of services,
If only one or two services are needed at a particular time, one or two other services may be left inactive.

In FIG. 1, the number (0) represents all consecutive events regarding the entire system as a function of time T. Two flows are shown for the transmission of six types of services. These are only illustrated; any combination of services can be called up, including a normal video television flow.

The interlaced two-field screen in the US NT80 standard has been replaced by "digital data." It transmits document information from which printed characters are formed and displayed on the user's screen.

The basic method and device are based on the aforementioned patent application for ``Television Digital Data Screen''.

This digital field is not displayed for the user to view. If you do this, you'll end up with irregular "splashes" generated by many digital pits that will appear on the entire screen.

The predetermined flow of information is repeated in the second field of the screen. This is to ensure that all data is received without errors by providing 100 bits of redundancy. Each scan line of data is appended with one check code to detect IIυ in the data and to use redundant data.

In the example shown in Figure 1, the second screen of the TelePijo format is assigned to "compressed audio". This is a device that transmits audio information.
Send in 30 seconds. This method and device are used for the ``compressed audio'' mentioned above.
According to a patent application.

Although this information is not visible to the user, it is converted from analog format to digital format and stored in memory for future use.
It is read out at voice speed and sent to the speaker of the user's television receiver. Reading at voice speed will result in decompression.

The TV-style 3 screens are allocated to the still image ``burst'' service. The term "burst" is an abbreviation for identifying IaIi surface signal bursts. This method and device is based on the aforementioned "Burst" patent application.

Full screen high clarity television l111g/! is available υ, this will be displayed on the user's screen. It is played back for as long as the user requests by static techniques using a video cassette recorder (VOR) or equivalent.

Aspects of these three types of services related to the present invention will now be discussed. For details on each of these, please consult the individual patent applications referenced herein.

The flow of $2 is @1', 2' and 5' l1iil
Illustrated below. In normal system usage, this concerns new objects. Eirin screen, 3'
, a car is shown, while the display in the sixth frame is a human being.

It is not necessary to introduce new objects into each stream. Objects can have continuous relationships. Whatever their relationship, the system and apparatus work to treat each individual stream as a new object from the beginning, i.e. from the beginning.

A desirable form of user control is shown in FIG.

This is a portable simplified keyboard 200,
The user control device 43' can be connected to the user control device 43' by either a multi-core cable 201 or equivalent optical or wireless connection.
functionally connected to.

The user side control device 43' is mutually connected to the video cassette recording/playback device 41 and at the same time to the video display device 44. The latter is a normal television receiver. These elements are illustrated in detail in FIG.

For the purpose of disclosing the general structure and operating status of the keyboard 200 and the operating devices therewith, alphanumeric data, compressed audio, "burst" (still) images, and conventional television (video) data are provided. Assume that a magnetic videotape, on which a portion of the tape (having a predetermined length) has already been recorded, is being played back on a video cassette recording/playback device (VOR) 41. For example, 8MPT1! An index code such as an i vertical interval time code (Vt(1)) is also included, thus making it possible to locate any screen on the tape.

The videotape is normally stored in a cassette 41a and serves as the information source for the apparatus of FIG.

The cheap in the VOR is rewound to the beginning and the vCR is placed in a "play" operation. The TV display 44 displays a blank space until visible information is played.

If you want to play an alphanumeric screen, press methane 232. Pressing button 232 when the display is a drawing changes the display to a document. The reverse is also true.

One form of alphanumeric display is the display of a document consisting of 16 lines of 62 characters per line. This document can be overlaid on a still image or a blank raster. This is an integrated image generator 568 made by American Microsystems.
This is done using a circuit represented by 047.

The entire page of an alphanumeric document for reproducing one page of one book is realized by displaying several consecutive sheets of display with 62 characters per line and 16 lines.

Typically, a vaR41 magnetic tape is accompanied by a start data screen that indicates what is contained on the tape. The VOR is controlled by the microprocessor 4a via machine 11051' according to a date strap program stored in the ROQ 4a. This start program causes the VOR to reproduce the information on the start data screen, along with the compressed audio screen, if any, into the RAM memory 50.

The VOR is then stopped and the written alphanumeric document is displayed on the T'V display 44.

The keypad 200 can be thought of as a separate extension of the control and status display panel of the user-side control device 43'. Please refer to Figure 3. Keyboard R consists only of key switch contacts. Typically these key switch contacts are arranged in rows and columns for scanning. When the user presses a key, it is sent to the control device via cable 201 or equivalent, such as an infrared connection, and input into the circuitry of control panel 52, from where it is output to the control status display panel. When I reached 53, I microprocessor mother i1i!
48 and sent to the microprocessor 47.

Element 53 consists of a medium-sized digital integrated circuit (M8I) and is a conventional microprocessor type configuration, with tri-state 'y'-) for address decoding, device selection, and selecting and inserting data into the motherboard 1i148. and has 7 lithoflots for storage of selected data from the busbars. For these elements, Texas Instruments' 74xJs240.74L830.74L8138 and 74L8259 can be used.

A tristate date has three types of states.

That is, the usual binary "high" and binary "low" and a complete open circuit condition. Thereby, it is possible to connect a large number of these r-) to the bus bar.

If one date is in an open circuit condition, it does not load the busbar, so there is no interference with other operations on the busbar. If P-) is active, it forces the bus bar to either a "high" or "low" state. This circuit structure is similar to old octopus telephone lines. Each tri-state date has a connection bin for mobilization. The address decoder decodes the specific address for that tristate date. If that address occurs, only that tri-state date is put into operation,
Sends the state associated with the input of P-) to the mother 1 IftK.

In FIG. 5, there is further one audio compression/decompression circuit 203.

The audio information is compressed at the sending device by quantization at audio speed, storage in memory, and readout at video speed. The read data is converted from digital to analog for transmission over the television channel.

This high-speed analog signal is converted to digital by the circuit 203, stored in memory, and read out at the same speed as the original audio.

The apparatus is according to FIG. 4 of U.S. Patent Application No. 264,744, "Compressed Audio System." A flowchart of the entire receiving apparatus is shown in FIG. 5, and a flowchart of the microprocessor for decompression is shown in FIG. 8B. All of these belong to FIG. 3 with respect to the device and to the flowchart with respect to the operation of that device.

Audio compression and decompression circuit 203 is controlled by microprocessor 47 via motherboard 1148. Eirin frequency information, which is compressed audio and is the subject of restoration, is input from the VOU 41 to the circuit 203 through the lead #204.

The required audio frequency is output from circuit 203 via conductor 205. The conductor 205 connects to the TV display device 44 in FIG.
Connected to the internal space f-power. Alternatively, it may be played back on another equivalent device for the user to listen to.

In certain embodiments of the invention, circuit 203 may be omitted if decompressed audio services are not provided. An alternative is to provide equipment for all three types of services, and if one service is not needed, it is simply disabled.

Proper control of the apparatus of FIG. 3 is illustrated in FIGS. 4 and 5. Both figures are flowcharts.To provide full control for handling multiple types of television information according to the present invention, it is necessary to make certain changes to each individual device and its operation.

FIG. 4 is a flowchart for the present invention. This makes a slight modification to the flowchart required for the same apparatus shown in FIG. 6 of Burst Application No. 249,792.

One of the changes is that question 91 of sign matching in both patent applications is now a question of whether the signs match by a small number of screens, for example 16, before the actual screen in question. This is done by slowing down the high speed videotape. Get the correct match after slowing down.

The second change is to replace the action item ``Reproduction of selected film program'' 93 in FIG. 4 with the entirety of FIG. 5.

FIG. 5 includes handling of not only one type of information but also multiple types of information according to the present invention.

In FIG. 5, the input to "Play Eirin forward at normal speed" 210 is the input to "Does code match?" 81 in FIG.
``Yes'' output. After function 210, function 211
``Reading the vertical section code'' comes. This is to correctly match the screen selected by the user.

Branching point 212 asks the question "Is the screen the selected screen?" If the answer is no, the operation returns to the entry to function 211 and the device proceeds to another screen. The answer is "yes"
If so, operation proceeds to another branch point 213, "Data Screen?" If this answer is “yes”, the action is 214
Proceed to "Storing data in RAM memory". This R
AM is RM M50 in FIG. If "No", proceed to another branch point 215, "Audio screen?" K. Function 214
The exit of 21 is located at the junction of branch points 213 and 215.
Even if step 4 is executed, the flow of operations below continues.

If the determination at branch point 215 is "yes", operation proceeds to function 216, "Quantize and Store Compressed Audio." This function is based on patent application No. 264,7 for “compressed audio”.
44, Figure 4, “Analog to Digital Converter” 41,
and “memory” 44. 1 as above
The exit from function 216 is at the "no" exit from branch point 215 and operation continues.

If the determination at branch point 215 is no, operation proceeds to the third possible type of data.

That is, it is a reproduction function 217 of "still image screen".

This is the function of the male video cassette recording/playback device 410 shown in FIG.

The next operation is the "play compressed audio" function 218. It is best to do this in advance while the static screen of amrun is being displayed at 217. When one playback is finished, a question is asked at branch point 219, ``Do you want to repeat the audio?''. If the answer is yes, function 218 is re-executed and the audio is repeated.

If the answer is “no”, the action is “display document page”22
Go to 0. This is the third type of information and is generated by the Eirin character generator 56 in FIG. This character generator is RAM
Digital data is supplied from 50. This data is entered in block 214 on this flowchart as described above.
It is stored in AM50.

The exit from function 220 goes to branch point 221, ``Document Iteration?''. If the answer is yes, function 220 is re-executed.

If the answer is no, the operations in the flow diagram of FIG. 5 are completed;
The process returns to the branch point 94 in FIG. 4, ``Reproduction completed?''. Normally, playback is completed and the operation returns to "Start" in FIG.

There are several decisions in these flowcharts other than those related to matching screens selected by the user using control panel 52 or equivalent panel 200.

The function of the Eirin code reading device 540 in FIG.
The purpose of this is to extract the digital information included in the video signal sent from 55. For details about this K, see “T
V.Digital Data Screens'' in patent application Ser. No. 295,955.

Each television field has a vertical interval time code consisting of two scan lines. These are each tele♂
It provides a unique professional address for the John screen as well as a string of address numbers for search control that runs the videotape in the correct direction and stops it when it reaches the requested address.

In addition to the time code, each screen can be a data screen, a compressed audio screen, or a picture gI! 8M to identify the screen
PTI! ! A detailed block diagram of the O reader 54 that uses the C-cut section for code utilization is shown in FIG. This is shown in FIG.

Figure 6 of this book shows block 51 in Figure 3, "Machine 4".
'' circuit diagram, we will consider this.

The connection on the left in FIG. 6 is to the busbar 48 of FIG. 6, which busbar typically has 28 conductors.

The connection on the right is the connection to VOR 41 in Figure 3. Figure 6 shows the software used to execute instructions between microprocessor 47 and VCU 410 connected to mother 114B. ing. This device embodies the flow chart of FIGS. 4 and 5.

The busbar 48 consists of 581 type conductors (i.e., address lines, data lines, and control lines).

The relationship between these and the microprocessor 4T and the elements shown in FIG. 6 is as shown in the following instructions.

111 (fs-)) instruction. Host address (0 to 25
5) are placed on the high level address lines A9 to M15 in FIG. The RIIiAD pulse is generated and the 0/M line is
It is held at "high" (true-to-work zero operating state 11i). External logic puts data on the data bus. This data is then stored in the microprocessor's internal accumulator register.

OUT (port) command. The 1-port V address is placed on the data bus of the accumulator data on the high order 8 bits of the address bus, and the WRITE clock output is generated along with the output/warning output in the "high" (true) state.

The microprocessor 47 can be an Intel 8085.

The input READ pulse is inverted by an inverting amplifier 280 and logically combined with the true state of 0/M at a HAND date 281 to generate a copulse.

This pulse is generated only when the "Work N" command is issued.

Similarly, the input WRITE pulse also passes through the inverting amplifier 282 and becomes NAND) f-t 283 "1? 10/M
f) It is logically combined with the true state 17g to generate an OUT pulse.

This pulse is also generated only when the "0υT" command is issued.

Coinciding with these commands and each pulse, the specific port address programmed into the program appears on address outputs A8-A15. Program instructions are port 25
When input from 4 is requested, address 254 appears in A8 to A15. In other words, A8 is "low",
h9 to A15 are "high" (A15 is interpreted as a value of "128", A14 is "64", and mu13 is "62").
It is interpreted as J. ) The NAN
D, the output of date 284 becomes "low". this? -) can use 74L8320. This "low" state and the "low" input and IN pulse from A8 are NA
Combined with ND date 285 (74Ls27),
[INPUTOL,OOK PORT
yields 254 J. This pulse is inverted by an amplifier 286 and sent to a tri-state 8-line receiver 287 (74LS2) to place the VOR status signal on the data bus.
44) is used for mobilization.

Whenever an N254J instruction in a program is executed, a VOR status signal is stored in the microprocessor's accumulator. "Powered on" status is OK (beep) OK, r
The status of the ``humidity switch'' is set to bit 2, the status of the ``humidity switch'' is set to bit 2, the status of ``cassette normally inserted'' is set to bit 3, and the status of ``recording status'' is set to bit 4.
The "pause state" state is assigned to bit 51C, the "r reproduction state" state is assigned to bit 6, and the "stop state" state is assigned to bit 7, respectively. These status bits are examined one by one by subsequent program instructions. The amplification elements shown in tristate receiver 287 each have a Schmitt trigger.

Similarly, when the % rOUT 254J instruction is executed in a microprocessor program, [0UTPUTO11
The 00K PORT 254 J signal is generated and the contents of the microprocessor's accumulator are placed on the data bus. “0UTPUT CI+O○K” is inverted by the inverting amplifier 289, and the falling pulse is
A flip-flop 290 is provided. 74r, 5273 can be used as this flip-flop. When the trailing edge of this pulse rises to 9, the signal on the data bus is written to the 7 lip flop.

If the accumulator content is 1, a VOH "stop" command is generated, if it is 2, a "play" command is generated, if it is 4, it is a "forward search", if it is 8, it is a "reverse search", and if it is 16, it is a "pause". ,6
Commands 2, ``Screen age advance'', 64, -Return, and 128, ``Record'' are generated.

When the program specifies port 255, a NAND date 291, an inverting amplifier 292.8 D fritz flops 293 work. At this time, the content of the accumulator is 1
In the case of , a "forward winding" command is given, in the case of 2, the commands of "variable playback", in the case of 4, "3/, playback speed", and in the case of 8, "1/lo playback speed" are given. It will be done.

In this example, the value of the accumulator is 16°32.6
No operation is assigned to the cases where 255 I-tots are specified with 4 and 128. The 255 output clock signal is caused by the generation of a plane pulse when A8 through A15 are ``high'' as a result of the ``OUT J'' instruction in the program, causing the output of inverter 292 to be ``low''. to enable the output of flip-flop 293.

When changing the operating state of the VOH as necessary, the control program stores a specific initial value corresponding to the accumulator, specifies a corresponding specific port number, and selects [0UT
It executes the J command.

The program also checks the status of the vCR. This is done by checking the status of each bit in the accumulator after executing the [EngineeringN254J instruction]. The program branches depending on the detected condition. If the power to the VCR is not turned on, the VCH will stop continuing to operate and an error message will be given to the operator.

Once the power status is normal, normal operation continues.

The method of operating the device of the invention in order to obtain the information required by the user is as follows.

At the beginning of operation, the VCR 41 plays back the data screen recorded at the beginning of the tape and stores that information in Memo I in Figure 3.
Store J 50K.

Thereafter, an alphanumeric explanatory document describing the information recorded on the tape is displayed on the TV display device 44. This may or may not be superimposed on a static moving image of the contents of the cassette; in some cases only a static image can be displayed.

When the user presses the ``1 index'' button 230, the highest index is displayed first. Typically, the title and brief description are followed by six lines:

? -Person 1 phabetical indow (alphabetical index) Oategorical 1ndex (departmental index)
8equential 1ndex (number order index)
In the above example, the cursor (〒-) is placed at the beginning of the first line.
is displayed, indicating that the subsequent display is a question.

When the "no" button 255 on the keyboard 200 of FIG. Move to the section index. "no"
If you press K while holding down the button, the cursor will automatically advance to the next line after a short delay. When the cursor reaches the last question line on the page, it automatically jumps to the first question line on the page.

This is done by program instructions measuring the amount of time the "no" button is closed and initiating an automatic line break if that time exceeds a time limit, such as 172 seconds. The control zologram moves the cursor display at a certain repetition period until the "no" button is released and a "yes" answer is received.

When the cursor is located on the first line, "Ken" Zatan 2
When 66 is pressed, the first page of the index of all titles on the cassette is displayed on the Eirin display device 4-4. This is done by extending certain branch instructions in the control program as a result of the "evening" response. Upon this branch, the control program replaces the previous representation with a new representation that is another portion of the data stored in memory 50.

A portion of memory 50 is allocated to provide a stack memory in which the control program stores the previous page number each time it jumps to a new page. "Previous page"
When the button is pressed, the stack pointer moves back one page, calls the old page number, and automatically replaces the display on the display device 44 with the previous page.

After going back one step, going forward one step overwrites the next number.

If the target title does not exist on the alphabetical index page on the display device, the user can select "Next page" methane 228
Press. With these two operations, you can advance to the next "page" consisting of 16 alphabetical titles. By pressing K while pressing this button, it is possible to scan the page in the same way as in the case of the lines described above.

When you reach the page containing the title you want, use the "no" methane to move the cursor to the line with the title you want, and
Next, use ``affirm'' methane to branch to the information of that title.

Due to the time code search mechanism, all lines on display 44 other than the selected title line are blank while VOR 41 is searching. The start-to-tape screen on the tape includes not only an alphabetic index of the objects recorded on the tape, but also the time-code cross-index address where the objects are located. These time codes are not displayed with the index, but can be used by the control program to search the tape to locate the selected property.

Once the selected page is located, the associated digital data screen is read and stored in RAM memory 50. The associated compressed audio screen is then read out and stored in the RAM memory 15 of FIG. 2 of "Compressed Audio" Patent Application No. 264,744. Next, the KVOR will display the selected screen statically and a 10 second audio notification (if present) will be played briefly after the image appears.

You can make this report as many times as you like by pressing the "voice" button 231 even after the report is finished! It can be repeated accordingly. It is also possible to stop this notification by pressing the "No" button. This causes the control program to branch to a wait state as well as when the voice is complete.

The document accompanying the image can be recalled by pressing T/PJ Methane 232. 1IiI & disappears and the document appears on the blank screen. About the image 11Ii
If there are documents on the i side or higher, the last line on the screen will be "? -NEXT BCRBHN J."

When the user has finished reading all the documents on one screen, he presses the "OK" button to view the next screen, and repeats this operation until all screens are displayed. The next screen will be the first screen again. Press the button 232 again and the image will appear.

When the user understands the information on the first page and is ready for the next page, he presses the "Next Page" button 228 and the VOR4
1 moves to the next ms screen, that image gI! Plays the digital data screen and compressed audio screen that accompany the screen.

While the tape is running, the alphanumeric name of the next image displayed is TVl [Water Equipment 44Km! It is possible to show. This is done by the control program. In other words, the control program has a mutual index of time code addresses and task names. The next page has a known time code address and this address is used to reproduce from RAM memory 50 an alphanumeric document giving the task name of the next image.

The user continues to press the "next page" button until the target IiiigI is obtained.

After that, several choices are possible. One is to "connect" by pressing the button 229. In this case, the tape is moved to another segment that has a prespecified relationship to the previously viewed object. This relationship is established by mutual indexing of another continuous time code address, which is first read from the beginning of the tape and stored in the RAM memory 50#c.

The current time code is activated by the control program to retrieve the concatenated time code (if any) from memory and automatically initiate a time code search on the tape to the concatenated time code address.

Another selection is to press the “Index” button 230. This causes the device to return to the highest index and perform the downward movement again.

Another selection is the "previous page" button 227 and the "concatenation" methane 22
Press 9 at the same time. This causes the tape to return to the beginning of the divided portion.

Another choice is to "concatenate" in the first of the related Imgroups.
By pressing button 229. This will skip over the current group and display the next connected group.

Another option is to press the "next page" button 228 to begin displaying the next set of property images (segments).

If the image segment is a moving image, the user bit in the time code address tells the control program to do so and to play it back at normal 'VOR television speeds.

If the segment is longer than a few minutes, it is possible to use a regular audio track recorded on tape. However, in many cases compressed audio is used because the short distance tape runs of the present invention do not provide useful audio duration on a regular audio track.

A well-constructed VOR tape will therefore have a BM with 64 useful bits per television line.
Digital data in the PTHji interval code format can be included. In addition to 64 data points, each scan 1i
1 includes an cyclic check (ORO) code, and the integrity of the data can be checked by the code.

Each television screen has a unique "code" specifying the hours, minutes, seconds, and its sequential address on the screen. This code is a screen that cannot be lost. This code for each screen specifies its absolute address (user bit code) with a 6-bit book number, 6-bit volume number, and 6-bit issue number, giving a number of 647 million. Furthermore, identification regarding the type of information is also performed.

The lowest 6c bits, the deaf identification bits, are busy for different purposes within each type of screen. That is,
Such purposes include regular continuous television displays, still screen images, compressed audio notifications, and digital data screens.

These digital codes accompany each television screen and in this embodiment are recorded redundantly on the scanning edges 13 and 15 of the WiIN section.

The screen bearing the document consists of 460 scanlines of digital data in the same substrate SMPTli scanline format. This includes a horizontal periodic pulse, 64 usable bits, and an ORO on each scan line. The scan field has 230 scan edges, and another associated field has 230 scan lines with identical objects. The screen is repeated twice. Thus, each of the two screens becomes a mesh of 64 x 230-14,720 bits with quadruple redundancy with ORO.

When receiving these data document screens, select [Normal, Jf
The ORO check is used to receive and receive t64-bit packets. Each of these packets is assigned an 8-bit scan line number by counting within the microprocessor 2 of FIG. 3 of "Television Digital Data Screen" patent application Ser. No. 295,955.

This scan line number is stored in the RAM memory 20K of FIG.
The bits are the scan line numbers, so the document KG is R.
Located within AM.

Since the scan lines have their numbers in the digital data recorded on them, it is possible to identify each scan line when playing back.

If there is one scan 11jK--error, the data from that scan line is accepted conditionally, and if there is no error, it is accepted unconditionally. When reading the second 256 books, those that were not previously accepted are read again and examined as before. This process is repeated on the second redundant screen if necessary, and continues until all scanlines have been accepted unconditionally. Following playback of the starting data screens on the cassette, the number of ORO errors is counted for each set of screens and a status report is displayed on display 44. The notification will remain on the screen for approximately 5 seconds and then continue operating. This status report displays the number of ORO errors relative to some threshold. In other words, for 0 to 5 ORO errors, a "low error rate" status report will be issued, and for 6 to 20 errors.
In the case of ``9 error rate, check the tape and head''
, 21 times or more, a status report of "High error rate, check tape and head" will be issued.

Data screens are used for alphanumeric documents and other purposes, such as initializing operating programs and providing cross-index tables. The ROM zologram includes an RA that reads the first few screens and processes them as instructions that make up the main program.
It has only enough instructions to store it in the address area of M memory 50. Once these first screens have been read and stored, the control program jumps to the start address of the stored main program. This method provides great flexibility in that a new main program can be provided as a data screen at the beginning of each tape.

Some screens can be used to cross-index specific category or subcategory listings by code number. For example, include documents that identify each with 10 bits @C1024) and 6 bits subcategory (64)% or vice versa. In this way, the encoded classification can be used with static data, providing great efficiency when iterating over documents. Sixteen "tokens" can be used for complete classification and subclassification document--one-taper submission and display on display device 44. This document data has 160 characters when stored in the form of alphanumeric characters.
♂ Requires tutu. By storing textual information in tokens in one cross-index table and then storing only tokens in many document screens, considerable savings can be made in memory and recorded data bits. Other frequently used words can also be further encoded with tokens to make more efficient use of memory. That is, [the
For the word J, D 4 + c in hexadecimal
By assigning 87 instead of 8 +05, [t
Every time you use heJ, you save 2 bytes.

Another type of digital data screen is used to inter-identify the time code screen number with the 62-byte document name.

62 bits for the coded classification and subclassification, and 62 bits for the linking time code address to the associated image item.

A compressed audio screen has a time code number one screen smaller than the still image screen it supports, and therefore has no special name other than that associated with the image. Similarly, the document screen that supports Ii has a screen number that is two screens smaller than the number of its master screen.

Alternative operating states of the system of the present invention further extend its flexibility. Only the minimum operating program is provided in the ROM memory 4 IL (FIG. 3). It then provides further motion zologram information in the form of a digital screen, either via the television channel or pre-recorded at the beginning of the relevant specific screen on the cassette tape, to augment the motion program. do. The operating program can thus provide the optimum for the object in question.

In this operating state, a minimal operating program in the ROM has sufficient instructions to read and store digital information in the form of a television screen. The program may further include minimal functionality for locating and displaying object information. Furthermore, it is possible to include a step in the program that recognizes a particular type of data screen as a program screen, so that these instructions are not stored in RAM memory 5 (l), but after the storage is successfully completed, this new Connect flow of control to stored instructions.

Since these commands are fundamental to the normal operation of the control device 43', this data screen is recorded with quadruple redundancy, or even more redundancy as practical.
Ensure accuracy.

This alternative operating state is such that a set of program data screens are displayed at the beginning of the cassette tape at the 21i! Since it only occupies part of the j-plane, it does not reduce the overall capacity of the system.

The term "cassette" herein should be interpreted broadly. It is simply an existing example of a means for storing video information. Video discs may also be used.

What is normally recorded on a cassette can also be transmitted directly via any kind of television channel without a recording step.

Although each item of equipment is given a specific model number, it is possible to use equivalent model configurations, as well as groups of equivalent circuits having the same function.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the flow of two transmission processes for three types of services. FIG. 2 is a block diagram regarding user side control. FIG. 3 is a diagram of a user-side control device for three types of services. FIG. 4 is a flowchart for FIG. FIG. 5 is a more detailed flowchart for the apparatus of FIG. FIG. 6 is a circuit diagram for the apparatus of block 51' of FIG. 41...Video silver picture playback device 41a...Cassette 43'...User side control device 44...Movie display device 47...Microprocessor 49...ROM5
0...RAM 54...Eirin code reading device 56...Eirin character generator 200...Keyboard. 203...Audio compression/decompression circuit. Agent Akira Asamura 4 peopleFIG, 1. . FIG2

Claims (1)

[Scope of Claims] (1) A method for providing various types of information via a television channel, comprising: (a) creating and storing digital alphanumeric information in video format; +1) l video format; a step of creating and storing compressed audio information of (cl
a step of creating information; (dl) a step of selecting and displaying the 1liirfi of the said staff information in video format; (θ) a step of selecting the compressed audio information and simultaneously decompressing and playing it; and (fl) the step of actually displaying said alphanumeric information in place of a screen of said graphics information in video format. The method according to claim 1 further includes the steps of: (1) selecting and manually controlling the type of information to be displayed to the user; Displaying the next image gIIli surface, (2j
13) Displaying the index; (4) Accepting the index entry and displaying more detailed information thereon; (5) Displaying the index entry; (6) requesting further detailed information regarding the displayed information; The method described above. (3) The method according to claim 1, further comprising (b) reproducing the video format information in order to select what to watch;
(cl) Step of reading the direct space code on each screen of health information, (cl) Step of comparing the code with the code of the selected screen, (1) If the selected screen is a single screen, the data is (el) If the selected round screen is an audio screen, quantizing and storing the compressed round audio format audio screen; and (ω decompressing the compression associated with its visual display. (4) The method as claimed in claim 1, wherein the type of information to be reproduced is further varied; (a) (b) inserting a code bit identifying the type of information at the beginning of the formation of the type of information;
9. Displaying the information to the user; and starting a dedicated device for reproducing the information. (5) A method according to claim 1, further comprising: (a) providing microprocessor instructions regarding the type of information in the cassette for manipulating the information present at the beginning of the cassette; and (b) storing the microprocessor instructions in a RAM memory for operating and controlling the information in the cassette in conjunction with the microprocessor. Method. (6) A device for transmitting various types of information via a video channel, comprising: (al) an alphanumeric information source in video format (41a), (b);
A device (50) for storing said alphanumeric information, (a)! ! 1! −Lin format compressed audio information source (
41a), (a a device for storing the compressed audio information (203), (.1 image information source C41 & of at least one video screen),
(fl 1lf A device for selecting and displaying the image and alphanumeric information (44), (gl A device for restoring the compressed audio information (203), +h) The restored audio a device for reproducing information, and (1) in conjunction with each of the above elements, selecting and displaying the image information, selecting and reproducing the restored audio information, and a control device (43', 200) for selecting and displaying alphanumeric information of the above, and having at least two different types of information sources. (7) Claim 6 The device according to paragraph 1, wherein said control device (43', 200) comprises (at) a microprocessor (47) having a memory device (49, 50).
, and (1)) identify each screen and, according to the function of that screen, (1) alphanumeric character generator (56); (2) compressed audio decompressor (43', 46.44); ) a video image reproduction device (41); a video code reading device (54) for activating at least one of the elements; (8) The apparatus according to claim 6, further comprising: (a) a bit string for the user of the vertical interval time code is encoded to identify the type of information contained in the cassette; a cassette (41a) having a code bit;
and (depending on activation by the sign bit in bl lll)
The device as described above, comprising: a device [44] for displaying visual information; and a device (54) for selecting and driving a device (205) for reproducing audio information. (9) Claim 8#! 6. The device according to item 6,
a) both said information source (41a) and said device for storing alphanumeric information (50) are digital; (bl) said information source covers approximately the entirety of each said screen; The device as claimed in claim 6, which continuously generates alphanumeric information. In each case: - said device comprising a device (41) for reproducing television synchronization pulses;