KR960008729B1 - Reservation recording apparatus for preserving data in stoppage of electric current - Google Patents

Abstract

a tuner (1) which inputs the television signal of various channel from antenna and outputs the television signal of selected channel; a recorder (2) which records the television signal from the tuner (1) in the tape; an input device (3) which inputs the reservation data such as discrimination symbol, time information and channel information for the selected program; a decoder (7) which extracts the program information from the tuner (1); an EEPROM (8) which stores the reservation data inputted through an input device (3); a controller (6) which reads the reservation data stored in a memory (8) and compares the data with the program information offered by the decoder (7), and executes the recording in tape by controlling the recorder (2) when the two compared data is equal.

Description

Reserved recording device that saves reserved recording data even in case of power failure

1 is a block diagram showing a conventional reserved recording apparatus.

2 is a block diagram showing a reserved recording apparatus according to the present invention.

3 is a diagram showing a signal form of a horizontal scan line multiplexed with a KBPS signal.

The present invention relates to a reserved recording apparatus of a video recorder having a decoder for demodulating encoded program information multiplexed on a television signal, and more particularly, to a reserved recording apparatus capable of storing reserved recording data even in a power failure state.

In the video recorder, the reserved recording device is a device for controlling the scheduled recording of a program to be generated in the future and its execution. The early reservation recording device was a time-controlled method that inputs the time and channel of the reservation recording program, and starts recording when it matches with the time information generated by the internal clock device. The reservation recording method using this time-controlled method has the disadvantages of maintaining the accuracy of the internal clock and setting the reservation recording data. As a method of improving the problem, a phenomenon-controlling method has been proposed.

In the phenomenon-controlled method, the program information encoded in the television signal is multiplexed and transmitted, and the reserved recording apparatus includes a decoder capable of demodulating such program information. In the reserved recording apparatus, information of a program, for example, identification information or the like, is inputted so as to start recording when it matches with the program information detected by the internal decoder. Examples of such a phenomenon-controlling method include the VPS (Video Program System) of the Federal Republic of Germany and the Korean Broadcasting Program System (KBPS) of the Republic of Korea.

Fig. 1 shows a block diagram of a reservation recording apparatus by the above phenomenon-controlled method. The reservation recording apparatus according to the configuration of FIG. 1 inputs a tuner 1 for inputting a television signal of various channels from an antenna and outputting a television signal of a channel selected by channel information applied thereto, and a recording unit 2 connected thereto. A memory 4 for storing reservation recording data input through the device 3, a clock device 5 for providing time information, a decoder 7 for demodulating encoded program information multiplexed on an input television signal, and It is provided with a control unit 6 for controlling the devices for performing the reservation recording.

In the operation of the reservation recording apparatus according to the configuration of FIG. 1, the decoder 7 inputs a television signal from the tuner 1, extracts coded program information multiplexed on the television signal, and transmits it to the control unit 6. FIG. The control unit 6 reads the identification symbol, time information, and channel information of the program included in the reservation data stored in the memory 4 and compares the program information provided from the decoder 7 to match the two information. 2) is controlled to start recording on the tape. In addition, the above operation refers to the time information provided from the clock device 5 in order to perform efficiently.

In order to explain the operation of the decoder 7 in detail, a description will be given of a KBPS (Korean Broadcasting Program System) for multiplexing and transmitting program information encoded in a television signal.

KBPS is a type of data broadcasting provided by broadcasting stations in South Korea, and is a broadcast in which 36 words of data each consisting of 8 bits (1 byte) are transmitted to a specific horizontal scan line during a vertical retrace period of a television signal.

3 is a diagram showing a signal form of a horizontal scan line multiplexed with a KBPS signal. The KBPS signal is transmitted multiplexed to one or more horizontal scan lines transmitted during the vertical retrace period of the even and odd feeds. As shown in FIG. 3, the KBPS signal is transmitted for a period of 51uS except for the horizontal synchronization signal and the burst synchronization signal. The high level of the KBPS signal is 70 IRE equal to the back level and the low level has a value of 0 IRE equal to the pedestal level. In the case of 36 words consisting of 8 bits during the 51uS period, the clock frequency is 5.7272 MHz.

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 from 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 constituted as a clock synchronization signal and a byte synchronization signal. The clock synchronization signal uses Word1 and Word2 as reference signals to match the data clock synchronization of the KBPS signal received from the KBPS receiver, and the value is 1010 1010 1010 1010. The byte synchronization signal is a framing code and is a reference signal for matching byte synchronization. The signals in the data section are allocated in units of bytes and are used to select the position of the first byte in the bit sequence because the correct 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 type PT, a packet structure TS, a program counter PC, and a program subcounter 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 for continuity check of video signal and free run to 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 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 the 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 the 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, it indicates summary information of a broadcast program.

The PC displays 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 broadcast date. Using a PC, you can find the start point and end point of the Weekly data. 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 section according to the PT.

If PT is 0, the NET-Q signal currently used for the control system between local broadcasting stations is transmitted. If PT is 1, the ON-AIT KBPS LABEL signal, which is the current time, the name of the broadcasting station, and the status of the currently broadcast program, is transmitted. If the PT is 10, the UP-DATE KBPS LABEL number, the current KBPS LABEL, and the UP-DATE LABEL are transmitted for the KBPS LABEL in the UP-DATE mode. If PT is 11, it is for KBPS LABEL in CHANGE mode. The number of the CHANGE MODE, the changed KBPS LABEL, the changed UP-DATE LABEL, and the changed display data are transmitted. When PT has a value of 100 to 111, KBPS LABEL, program time, and program title are transmitted for WEEKLY KBPS LABEL for 1 to 4 weeks, respectively.

As shown in Table 3, when the packet type (PT) has a value of 4-7 and the lower 3 bits of the packet structure (PS) are 0, the data transmitted to Word19-Word35 of the data block is determined by the current broadcast program. Have a program title.

Table 4 shows the types of KBPS LABEL.

In the reservation recording apparatus according to the configuration of FIG. 1, the control unit 6 is usually implemented using a microcomputer. Microcomputer uses its internal memory (Random Access Memory) to store reserved recording data. However, since the internal memory of the microcomputer is a volatile memory, when the power to the microcomputer is cut off by a power failure, all the stored contents are erased and the reserved recording data cannot be preserved. Accordingly, it was inconvenient to perform the reservation recording again after the power failure.

Accordingly, it is an object of the present invention to provide a reservation recording apparatus capable of storing reservation recording data against an accident such as a power failure.

The reservation recording apparatus according to the present invention which achieves the above object is characterized by having a nonvolatile memory for storing reservation recording data. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is a view showing an embodiment of a reservation recording apparatus according to the present invention. In FIG. 2, the same reference numerals are used for the same elements as those in FIG. 1, and a detailed description thereof will be omitted.

The reservation recording apparatus shown in FIG. 2 uses a nonvolatile memory as a memory for storing reservation recording data. Non-volatile memory (ROM), unlike RAM, has a characteristic that stored contents are preserved even when a power supply voltage is applied thereto. There are many types of nonvolatile memory. Initially, ROM was limited to write once, but recently EEPROM (Electrically Erasable and Programmable ROM) can be written and erased by an external electric field. In the present invention, the EEPROM is employed to store reservation recording data.

The reservation recording data set via the input device 3 is stored in the EEPROM 7. The control unit 6 reads the identification symbol, time information, and channel information of the program included in the reservation data stored in the EEPROM 8, and compares the program information provided from the decoder 7 to match the two information. 2) is controlled to start recording on the tape.

Even if a power failure occurs temporarily after setting the reservation recording, since the reserved recording data is stored in the EEPROM 7, which is a nonvolatile memory, the controller 5 can normally perform the reservation recording.

As described above, the reserved recording apparatus according to the present invention stores the set reserved recording data in the nonvolatile memory so that the reserved recording can be normally performed even if a temporary power failure occurs after the reserved recording is set.

Claims (1)

A tuner (1) for inputting television signals of various channels from an antenna and outputting television signals of a channel selected by channel information applied thereto; A recording section (2) for recording the television signal from the tuner (1) on a tape; An input device 3 for inputting reservation data such as an identification code, time information, channel information, etc. for the selected program; A decoder (7) for extracting program information such as identification code, time information, channel information, etc. multiplexed on the television signal from the tuner (1); An EEPROM (Electrically Erasable and Programmable ROM) 8 for storing reservation data input through the input device 3; A control unit 6 which reads the reservation data stored in the memory 8 and compares the program information provided by the decoder 7 with each other to control the recording unit 2 to perform recording on the tape. Reservation recording device comprising a.