KR960007950B1 - Reservation recording setting method by program discrimination signal - Google Patents

Abstract

The identification code specific to the program listed on the program schedule is set as a basic data for the reservation recording. An input television broadcasting signal is being recorded according to the identification code, which is compared with the identification code multiplexed with the television signal. The identification code(ID), whether it is dependent on or independent of the broadcasting time, is registered in a manner not to overlap with an ID of the other program. The method is carried out by a system comprising a tuner(1), a RF demodulator(2), a micom(3), a video recorder(4), a KBPS decoder(5), a memory(6), and a timer(7).

Description

How to set up scheduled recording by program identifier (ID)

1 is a cross-sectional view showing the shape of a KBPS signal multiplexed on a horizontal scanning line.

2A-2B are flowcharts illustrating one embodiment of a reservation recording method according to the present invention.

3 is a diagram showing an example of a program guide table.

4 is a block diagram showing an embodiment of a reservation recording apparatus suitable for the reservation recording method of the present invention.

5a-5b are flowcharts showing another embodiment of the reservation recording of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reserved recording method of a video recorder, and more particularly, to a reserved recording method that simplifies setting and performing reserved recording using an identification code (ID) of a program.

The scheduled recording function of the video recorder sets the information (channel, date, time, length) about the program to be recorded in case the user is absent, and uses the built-in timer to set the broadcast signal of the channel set at the set date and time. To record the set length.

Such scheduled recording is performed through the following process.

1) Setting of year and date

2) Channel Setting

3) setting of start time

4) Setting end time

5) Setting of mode (NORMAL, DAILY, WEEKLY)

6) Setting of speed mode (SP, LP.SLP)

In the conventional reservation recording method based on the time setting as described above, there is an inconvenience of having to go through a multi-step process and a high error occurrence rate.

The reservation is performed for the reserved program by the above process by using the timer built in the video recorder to record the broadcast signal of the set channel from the set date and time by the set length. Since the time-controlled scheduled recording is controlled only by the channel in which the set time is set, there is no relation to what is actually recorded in the program.

If a temporal variation occurs in a program after the reservation recording setting for the program guided by the program guide is completed, such a change should be noticed before execution and at the same time, a new reservation recording setting should be made according to the notice. If the change is not noticed or the new scheduled recording setting is not completed according to the notice, the video recorder will generate a false record.

It is therefore an object of the present invention to provide a new scheduled recording method that replaces the time controlled scheduled recording method described above.

The reservation recording method according to the present invention for achieving the above object comprises a reservation setting process of inputting a program-specific identification symbol presented in a program guide table or the like as reservation recording data; And a reservation recording process for starting recording when the identification symbol appears in the input television signal. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention is characterized in that reservation recording is performed by using a program identifier transmitted by being multiplexed with a television signal. The identification symbol is a signal for distinguishing a program, and is a code configured independently or non-independently from the broadcast time of the program and should not be overlapped with other programs.

Prior to the detailed description of the present invention, a data broadcast for transmitting encoded data multiplexed on a television signal will be described.

Data broadcasting refers to a broadcasting system that transmits various types of digitally encoded information that is not included in an audio signal or a video signal, and includes teletext, a video program system (VPS), a video programmed video recorder (VPV), and a Korean broadcasting program system (KBPS). ) Has been put to practical use.

Data broadcasting employs a highly compressed encoding method to transmit various types of information, compared to voice broadcasting or television broadcasting, thereby enabling high efficiency transmission.

In data broadcasting using a television signal, non-return to zero (NRZ) modulated information is multiplexed and transmitted in a vertical blanking interval (VBI) of a television. One example is the VPS, which has been operating since 1985 in the Federal Republic of Germany. This is a method of transmitting a signal for automatically recording a program to the VTR. The VPS signal is transmitted multiplexed on the 16th line of the feed signal. The VPS signal is composed of 15 words each composed of 8 bits, of which the 11th to 16th words are provided as data for controlling the video record.

Meanwhile, Korean Broadcasting Program System (KBPS) is provided in Korea. In KBPS, 36 words each consisting of 8 bits (1 byte) are transmitted to a specific horizontal scanning line during the vertical retrace period.

1 is a diagram showing horizontal scanning lines multiplexed with data in KBPS. The KBPS signal is transmitted multiplexed to one or more horizontal scanning lines transmitted during the vertical retrace period of the even and odd feeds. As shown in FIG. 1A, the KBPS signal is transmitted for 51 mu S except for the horizontal synchronizing signal and the burst synchronizing signal. The high level of the KBPS signal is 701RE equal to the back level and the low level has a value of 0 IRE equal to the pedestal level. When 36 words consisting of 8 bits are transferred during 51µS, the clock frequency is 5.7272MHz.

The KBPS signal is composed of 36 words, and each word can be classified into a synchronization signal part, a header part, and a data part. The synchronization signal portion occupies the first word Word1 to the third word Word3. The header portion occupies the fourth word Word4 to the tenth word Word10 and the data portion occupies the rest.

Table 1 shows the configuration of the synchronization signal section in the KBPS signal.

The synchronization signal portion is composed of a clock synchronization signal and a byte synchronization signal. The clock synchronizing signal uses Word1 and Word2 as a reference signal for synchronizing the data clock of the KBPS signal received from the KBPS receiver, and the value is 1010 1010 1010 1010. The byte sync signal is a framing code and is a reference signal for byte sync. Signals in the data portion are allocated in units of bytes and are used to select the position of the first byte in the bit sequence because the conquered data cannot be recovered if any one bit in the bit sequence is missing or an error occurs.

The byte sync signal uses Word3 and its value is 1000 0100.

Table 2 shows the configuration of the header portion of the KBPS signal.

The header portion is configured as a feed counter FC, a packet pipe PT, a packet structure TS, a program counter PC, and a program sub counter PSC. FC and PT are essential data and PS, PC and PSC depend on the type of PT.

FC consists of Word4 and is used to check the continuity of the video signal and free run to the value of 0- $ F. PT is composed of Word5 and indicates the type of data part and has a value of 0- $ F.

PS is configured as Word6,7 and indicates the length of a valid data block.

The upper five bits of the two bytes indicate the length of the valid data block of the data portion. The maximum length of a valid data block of the data portion is 28. The lower 3 bits indicate the type of data block. If the lower 3 bits are 0, the content of the data block indicates KBPS LABEL, time, and title (8 characters) of the broadcast program. In the case of 001-010, when the title of a broadcast program exceeds 8 characters, it is used continuously. In the case of 011-111, broadcast program information is summarized.

The PC indicates the order of the broadcast date when transferring Weekly data as Word8. Displays the serial number according to the date increase based on the current day of broadcasting. Using the PC, you can find the start point of the Weekly data and the end point. The PC can count from 0- $ F as 1 byte, so it can display a total of 2 weeks.

The PSC displays the serial number for each broadcast program corresponding to each date in the daily data contained in the Weekly data as Word 9 and 10. The lower 7 bits of the 2 bytes indicate the serial number of the broadcast program, and the upper 1 bits are set when changing the date of the program on the day and used as a control signal.

Table 3 shows the configuration of the data part according to the value of PT.

Table 4 shows the types of KBPS LABEL according to the value of PT.

When the packet type PT has a value of 1, the data transmitted in the data block has an identification symbol LABEL of the currently broadcast program. This identification symbol is inherent in the broadcasting station and has an incompatible characteristic irrespective of the occurrence time of the program.

And when the label LABEL has a value of 0 and 1, it has a special status display function for the currently broadcast program. As shown in Table 4, when 0 indicates a temporary interruption state of the currently broadcast program (for example, by commercial or temporary news). In the case of 1, it indicates the cancellation of the currently broadcast program (for example, when emergency news is broadcast for a long time).

2A and 2B are flowcharts illustrating a method of setting reservation recording and performing a reservation recording according to the present invention. In the reservation recording setting process according to FIG. 2A, it is first determined whether the reservation recording is set. If not in the scheduled recording setting mode, the program ends (step 210).

The identification symbol of the selected program is input by referring to the program guide table (step 220).

When the input of the identification symbol is completed, it is stored and the scheduled recording setting program ends (step 230).

The reservation recording aquatic process according to FIG. 2B will be described. First, it is determined whether the reservation recording is set. If the scheduled recording mode is not set, the scheduled recording program is terminated (step 240).

Determines whether reservation recording is in progress. If the scheduled recording is in progress or the paused recording is paused, the process branches to step 300 (step 250).

The identification symbol is detected by inspecting the currently broadcast television signal (step 270).

It is checked whether the detected identification symbol matches the identification symbol of the program for which reserved recording is set. If not, the scheduled recording program is terminated (step 280).

Set the video recorder to recording mode and exit (step 290).

The identification symbol is detected by inspecting the currently broadcast television signal (step 300).

It is checked whether the detected identification symbol matches the identification symbol of the program for which reserved recording is set. If there is a match, the process proceeds to step 290 to set the video recorder to the recording mode and ends the scheduled recording program.

Check if the detected identifying symbol is a suspend / cancel signal. If the suspend / cancel signal, the process branches to step 340 (step 320).

The recording mode of the video recorder is released and the scheduled recording program is terminated (step 330).

The video recorder is set to the PAUSE state and the scheduled recording program is terminated (step 340).

3 is a diagram illustrating an example of a program guide table. The channel, start time, date and length of each program disclosed in the guide table shown in FIG. 3 may be provided as an identifier of a program. In this case, the identifying symbol is compatible with the occurrence time of the program.

4 is a block diagram showing an embodiment of a reservation recording apparatus suitable for the reservation recording method of the present invention. The reservation recording apparatus according to the configuration of FIG. 3 includes a tuner 1 and an RF demodulator 2. The tuner 1 outputs the television signal of the selected channel in response to the channel selection signal provided from the microcomputer 3.

The RF demodulator 2 RF demodulates the television signal provided from the tuner 1 and outputs a video signal and an audio signal.

The video recorder 4 inputs video and audio signals from the RF demodulator 2.

The KBPS decoder 5 inputs an image signal including a KBPS signal from the RF demodulator 2, decodes and outputs program information from the KBPS signal.

The microcomputer 3 writes / reads the identification symbol of the selected program inputted through the input means 8 by the program embedded therein into the memory 6 and identifies the program from the program information provided by the KBPS decoder 5. The symbol is extracted and compared with the contents of the memory 6, and the video recorder 4, the tuner 1 and the timer 7 are controlled according to the comparison result.

The remote controller 8 or the barcode reader 9 inputs information (channel, start time, date and length) about the program selected for the scheduled recording among the various programs described in the program guide table 10 or other additional information. Used to specify.

The reservation recording operation by the configuration of FIG. 4 will be described in detail with reference to the flowchart of FIG.

The program guide table 10 has information about various programs. Information about a program for which reservation recording is required is stored as a target value in the memory 6 via the microcomputer 3 by an input device such as a barcode reader 9 or a remote controller 8 including a keypad. Setup process)

In the setting process of the reserved recording, the microcomputer 3 will control the necessary input and output. For example, it is possible to display the necessary information through the display device attached to the remote controller 8 to confirm the input identification symbol and to input the normal / continuous mode.

Next, recording is performed by determining whether a broadcast program is a program for which reserved recording is set. The tuner 1 supplies the RF demodulated video / audio signal corresponding to the channel selection signal to the video recorder 4 and the KBPS decoder 5.

The KBPS decoder 5 decodes the program information having the identification symbol of the program multiplexed on the video signal and transmits it to the microcomputer 3. The microcomputer 3 manages the identification symbol ID13 of the program from the program information in the KBPS decoder 5 and compares it with the identification symbol ID13 for the selected program stored in the memory 6. If the two identification symbols match, the video recorder 4 is controlled to record the signal input thereto.

If commercials, temporary news, etc. are inserted during the reservation recording, the program identifier detected through the KBPS decoder 5 will have a special state value of 0 or 1. In this case, the microcomputer 3 switches the video recorder 4 to the pause mode and waits for the original program to be broadcast.

The identification symbol of the program may be prepared in relation to the start time of the program in consideration of compatibility with a conventional time-controlled recording method. Such non-independent identifiers will include the channel, time, time, date and length of the program. The microcomputer 3 can be programmed to make use of this information.

5A and 5B are flowcharts illustrating another embodiment according to the reserved recording method of the present invention. In FIG. 5, the same reference symbols are used for the same steps as those in FIG. 2, and detailed description thereof will be omitted.

In the reserved recording setup program shown in FIG. 5A, step 225 for obtaining start time and channel information of the selected program based on the input identification symbol is added.

In the reservation recording execution program shown in FIG. 5B, step 260 of determining whether the remaining time until the reservation start time is less than or equal to the predetermined time T is added. For this purpose, the timer 7 is given a target value for generating the start signal of the reservation recording operation at the required time. This target value will be based on the date and start time obtained from the identifier and will be adjusted accordingly. For example, the microcomputer 3 will adjust the start time of the timer 7 to drive the tuner 1 and the KBPS decoder 5 from 10 minutes before the start time to start the scheduled recording.

The microcomputer 3 starts the reserved recording operation by the start signal from the timer 7, and at the beginning of the operation, the channel information stored in the memory 6 is read and supplied to the tuner 1 to search all channels. Overcome any inefficiencies you may have.

As described above, in the present invention, as in the time-controlled method, the reserved recording is performed by inputting only the identification symbol of the program without inputting all information (channel, date, start time, length) related to the program. Has the advantage of simplifying the setting.

In addition, the invention of the present application has the effect that it is possible to prevent the mis-recording due to the change or cancellation of the program by performing the scheduled recording in synchronization with the actual broadcast time of the program.

Claims (6)

A setting step of inputting a unique identifier having characteristics incompatible with the occurrence time of the program as reserved recording data; And recording the television signal input during the period in which the identification code is detected by monitoring the input television signal. The method of claim 1, wherein the setting step comprises: an input step of inputting an identification code of a selected program; And a storing process of storing the identification code. The method of claim 1. The performing step includes: an identification code detection step of periodically monitoring the appearance of the identification code; And a recording process of performing a recording operation during the period in which the identification symbol appears. A setting process of inputting, as reserved recording data, a unique identifier having a characteristic compatible with the occurrence time of the program; And monitoring the input television signal to record the input television signal during the period in which the identification code is detected. The method of claim 4, wherein the setting step comprises: an input step of inputting an identification code of a selected program; A conversion process of converting the input identification symbol into channel information and time information of the selected program; And storing the converted channel information and time information together with an identification symbol. The method of claim 4, wherein the performing step comprises: an identification code detection process of monitoring the appearance of the identification code from a point in time at which a predetermined time T is earlier than a start time of the selected program; And a recording process for performing a recording operation while the identification symbol appears.