JPH0765436A - Automatic TV program recording method - Google Patents

Abstract

(57) [Summary] [Purpose] When a TV program is reserved and recorded on a video deck, the program is surely recorded even if the broadcast start time of the recording target program is postponed. [Structure] Among the video signals transmitted by the television broadcasting device, in particular,
During the vertical blanking period, a signal component modulated with a code number indicating the program being broadcast is inserted, and the recording target program is set by entering the above program code into the reservation section to set the reservation and wait for reservation. When the VCR in the state receives the program code signal after the reserved time, it activates the recording function to perform recording.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for automatic reservation recording of television broadcast programs.

[0002]

2. Description of the Related Art Conventionally, when a television broadcast program is reserved for recording on a VCR, a person directly or via a remote controller, in the reservation section of the VCR, the broadcasting channel number of the program to be reserved and the start / end time of the program. Setting method, or in the case of a VCR that has a reservation section with a G code conversion function, when a G code is input, this G code is used in the reservation section for the channel number of the program broadcast and the broadcast start / end time. The reservation method that is converted and set is adopted.

When the recorded program is set in the VCR reservation section and set in the reserved state by the above, when the start time set by the reservation section is recognized, the recording function of the VCR is activated and the end time is reached. Perform recording operation and stop.

[0004]

With the recording reservation made by the above method, the broadcast time of the program before the reserved program is extended and the broadcast start time of the reserved program is delayed from the originally scheduled time. If the reserved program is broadcast, or the broadcast of the reserved program is stopped, the VCR starts the recording operation at the recording reservation start time and records a program other than the intended one.

The present invention solves the problems of the above-described conventional recording reservation method, and ensures that even if the broadcast start time of the recording reservation target program is delayed and changed, the target program is surely recorded on the VCR. Is to provide.

[0006]

[Means for Solving the Problems] To achieve the above object,
In the method of reserved recording of a broadcast program in a TV broadcast / reception recording system including a TV program broadcasting apparatus and a VCR according to the present invention, a part of a video signal transmitted by the broadcasting apparatus is modulated with a code number representing a program being broadcast. Insert the specified signal component, set the recorded program, and start the recording function to start recording when the VCR in the reserved state receives the code number signal after the set recording reservation time . Then, the signal component modulated by the code number representing this program is inserted in the vertical blanking period of the video signal transmitted by the broadcasting device.

[0007]

According to the present invention, the VCR that is in the reservation standby state with the code number representing the program to be recorded set is
After recognizing the recording reservation time, start recording when the program code number extracted from the received video signal matches the program code number set at the time of reservation above, and stop recording when the program duration time has elapsed. Therefore, even when the broadcast time of the program before the reserved program is extended, the previous program which is not the recording target is not recorded.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Prior to the description of the embodiments of the present invention, an outline of the structure of a video signal in conventional television broadcasting will be described with reference to the following documents. NHK Television Technical Textbook (above) edited by the Japan Broadcasting Corporation The following explanation The chapters and item numbers in parentheses at the end of each sentence are:
In the above references, the chapters and sections in which relevant items are described are shown.

The video signal of the television broadcast is 21 scanning signals of one scanning line for each set (field) of 1/2 screen configuration of the signal of one scanning line (raster) divided by the horizontal synchronizing signal. The structure is as shown in the explanatory view of FIG. 2 in which a vertical blanking period having a doubled period is inserted.
(Chapter 1.1.4) This vertical blanking period is also divided by the horizontal synchronizing pulse which shows the signal period of one scanning line, and is composed of equalizing pulses and cutting pulses for 9 horizontal synchronizing pulse intervals. A vertical / horizontal synchronization adjustment period is provided to maintain stable horizontal and vertical synchronization. On the other hand, the remaining 22 horizontal sync pulse intervals are a preliminary idling period. However, when performing a character broadcast, a character signal encoded in a part of this idling period or a broadcast station operation Signals are inserted and superimposed and used.

A coded character signal in the case of character broadcasting is composed of a 24-bit synchronizing part and a 272-bit data packet inserted in one horizontal synchronizing period delimited by the horizontal synchronizing signal in the vertical synchronizing period. Is composed of
It is supposed to occupy a plurality of predetermined sections divided by the horizontal sync pulse within the idling period.
(Chapter 2 2.4) One embodiment of the present invention will be described below based on the description of the outline of the configuration of the video signal in the conventional television broadcasting.

In the television broadcasting / reception system for surely and easily operating the reservation automatic recording of the broadcast program according to the present invention, a part of the video signal transmitted by the broadcasting device is modulated with a code number that distinguishes the program being broadcast. The code number representing this program is 8 decimal digits at the longest, as seen in the conventional G code number.
The number of digits is within, and the data length in binary encoding is
32 bits or less will suffice.

As described above, the code number 2 representing the program
Since the length of the hexadecimal coded data is within 32 bits, this program code number can be recorded by means similar to the means for transmitting the coded character signal having the data capacity of 272 bits in the case of the above-mentioned character broadcasting. It is possible to transmit by using one unused horizontal synchronization period of the idling period within the vertical blanking period of the signal.

FIG. 1 shows that a code number for dividing a program is inserted into one horizontal synchronizing period of an idling period within a vertical blanking period of a video signal and transmitted, and a VCR on the receiving side
FIG. 1 is a configuration diagram of an embodiment of a broadcasting system according to the present invention, which receives the code number and recognizes it as a code number of a reserved program, and then starts recording of the recording.
(A) is a configuration diagram showing a device configuration on the broadcast side, and (b) is a configuration diagram of a video deck on the reception side.

In FIG. 1 (a), reference numeral 1 is a television program transmitting apparatus for transmitting video and audio signals, and 2 is a television transmitter for broadcasting video and audio signals from a transmitting antenna 3, both of which are known in the related art. It is composed of technology. Then, 4 sets the program code for the broadcast program,
A program code that encodes and outputs this is a setting device. The program code sending device 5 adds a synchronization code, an error correction code, and the like to the program code to make a program code signal. The signal is superposed within the vertical blanking period of the signal and is emitted from the transmitting antenna 3 as a television broadcast radio wave through the television transmitting device 2.

In the block diagram of the embodiment of the VCR according to the present invention shown in FIG. 1B, the television broadcast radio wave on which the program code number code is superimposed in the vertical blanking period is captured by the receiving antenna 7 and Reception and demodulation section 8 of the deck
The signal component is demodulated at. The program code extracting unit 9 extracts the program code number from the vertical blanking period portion of the demodulated video signal and outputs it to the reservation unit 10, and outputs the video / audio signal component to the recording unit 20.

The reservation section 10 is composed of a reservation setting section 11, a program code number collating section 12 and a control section 13. The code number of the program to be recorded inputted by the reservation setting section 11 is:
The program code number collator 12 is set and stored, and the broadcast channel number of the program to be reserved and the start / end times of the program are also encoded and set and stored in the controller 13. When the control unit recognizes the start time of the reserved program, the amplification / demodulation unit 8, the program code extraction unit 9 and the recording unit 20 of the VCR are powered on and put into a recording standby state. In this recording standby state, the program code number extracted by the program code extraction unit 9 is output to the collation unit 12 of the reservation unit 10, and this program code number is preset in the collation unit 12 by reservation. When it matches with, the matching unit 12 sends a matching signal to the control unit 13, and the control unit 13 activates the recording unit 20. Then, when the recording time set by the program start / end time elapses, the recording is stopped and the state of standby for reservation is restored.

[0017]

According to the present invention, in the state where the recording of the television broadcast program is reserved, the broadcast time of the program before the reserved program is extended, and the broadcast start time of the reserved program is earlier than the originally scheduled time. Even if it is delayed or the broadcasting of the reserved program is canceled, the VCR will
Although it enters the recording standby state at the start time of the recording reservation, it does not start recording until the code number of the program extracted from the received video signal matches the program code number set at the time of reservation. The effect of preventing a situation in which a program is unnecessarily recorded and a program intended for recording is not recorded is obtained.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a television broadcast / reception system for performing a recording reservation of a television program by the method of the present invention,
(A) is a block diagram of a broadcasting apparatus, (b) is a block diagram of a receiving VCR.

FIG. 2 is an explanatory diagram of a basic configuration of a television video signal.

FIG. 3 is an enlarged explanatory diagram of a vertical blanking period portion of a TV video signal.

[Explanation of symbols]

 1 TV program transmission device 2 TV transmission device 3 transmission antenna 4 program code setting device 5 program code transmission device 6 program code multiplexing device 7 counter 8 reception antenna 9 reception demodulation unit 10 reservation unit 11 reservation setting unit 12 collation unit 13 control unit 20 Recording section

Claims (2)

[Claims] 1. A method for recording reservation of a broadcast program in a television broadcast / reception recording system comprising a television program broadcasting device and a VCR, wherein a part of a video signal transmitted by the broadcasting device represents a program being broadcast. When the VCR that has the signal component modulated by the code number inserted and the recorded program is reserved and is in the reserved state receives the code number signal after the set recording reservation time, activate the recording function to record. A method for automatically recording a TV program, characterized by performing the following. 2. The automatic television program according to claim 1, wherein the signal component modulated by the code number representing the program is inserted within the vertical blanking period of the video signal transmitted by the broadcasting device. Recording method.