KR100215143B1 - Television set - Google Patents

Abstract

If the incoming transmitter is blocked, the television set must be manually set to receive an alternative transmitter that broadcasts the same program, or the recording must be interrupted during the interruption time if recording of a program previously programmed by the video recorder has already begun. According to the invention an alternative transmitter with the same time and program source code is automatically set by the selection circuit using the VPS code transmitted during the blanking period. The invention applies to television sets, in particular video recorders.

Description

TV set

The present invention relates to a television set according to the preamble of claim 1. Such a device is conventional. In other words, it is known to reserve a program of a certain transmitter with a video recorder by inputting time and date and operating a station select button of the desired transmitter. A transmitter (frequency) selected from the transmitters receivable there by individual inputs is assigned to each station select button.

For the recording of programs, it is known to distinguish programs by codes which are fixedly transmitted during the blanking period of the television signal. (DE-PS 33 28 0001).

The code includes, among other things, data about start time, date and program source (transmitter). The pre-programmed set is program controlled or time controlled or time controlled to switch from stand-by operation to receiving operation at a predetermined time regardless of the manner of input, so that the desired program is automatically recorded on the video recorder. However, if the transmitter set during the receiving operation is cut off, the program may not be recorded in the video recorder until the end.

It is an object of the present invention to enable reception or complete recording for a predetermined time despite the blocking of the set transmitter.

This object is achieved by the features described in claim 1 according to the invention. Preferred embodiments of the invention are set out in the dependent claims.

After switching on a preprogrammed program in the device, the received transmitter fails and switches automatically to an alternative transmitter with a characteristic code that matches the code of the set transmitter. To this end, an alternative transmitter with a smaller field strength needs to be programmed with one of the set of station select buttons, or different program chains need to broadcast the same program. In this case, for example, there is a common ARD / ZDF morning program. The telephone switching process is performed by a memory, a comparison circuit and a station selection button, that is, a selection circuit having a device for querying stored frequencies (stand operation). In addition, the device must include circuitry for processing code that characterizes the program.

After switching from the standby operation to the reception operation, a characteristic code is generated from the VPS decoder and input into the memory, and the code is stored in the memory for the duration of the desired program. The stored code is compared with the code fixedly received in the comparison circuit. As a result of the comparison, if the two codes match, the comparison circuit does not transmit a signal. Only when no code has been previously received, a switching signal is generated, and the switching signal initiates a scan operation, i.e. querying the station selection button for the stored transmitter and its code information. Even if there is no code information, valid information, that is, a composite image signal (FBAS signal) can be received at all.

In this case, to avoid the scan operation, a logic circuit is connected after the comparison circuit,

The scan command is output even when there is no composite recall signal by the logic circuit.

Now, in a known manner, the station selection button (memory place) is periodically controlled, for example, in the order of program place-number. If a transmitter with a code (time, program source code) that matches the stored code is set, the scanning operation is interrupted because no more signal is output from the comparison circuit. While the found first transmitter is received at low field strength, other transmitters that are still not queried may have high field strength. To enable querying of this transmitter, another circuit may be provided that queries all transmitters that are received. This circuit sets the transmitter providing the best reception by evaluating station-memory locations with matching codes and the corresponding field strength. Such circuits are expensive but may be implemented, for example, by the use of a microprocessor.

In a simpler variant that does not evaluate the field strength, it is important to classify the receivable transmitters according to the field strength and assign them in this order if the scan operation is performed in the station memory, for example, as the program number increases.

Hereinafter, the present invention will be described in detail with reference to a block circuit diagram illustrated in the drawings.

In the figure the input of the television set is shown. The signal received by the antenna is supplied to the input of the tuner 1. The tuner 1 is tuned to a television transmitter that can be received there by a value programmed in the memory 2, for example a direct current voltage assigned to a constant reception frequency during programming. The transmitter is set by the operation of the station selection button (not shown) or by the inquiry circuit 7 and transmitted to the tuner 1 for tuning purposes. An amplifier and a demodulation circuit 2 are connected after the tuner 1, from which the composite image signal of the transmitter is on the one hand to another processing circuit and on the other hand. It is supplied to the VPS decoder 3.

The VPS signal included in the blanking period is processed by the VPS decoder 3, read into the memory 4 through the switch 11, and applied to the first input of the comparison circuit 5. When a program programmed in advance by a programming device (not shown) is started, the switch 11 is connected, for example, time-controlled and blocked after reading the code, so that the code is stored for a desired program. The code stored in the memory 4 is supplied to another input terminal of the comparison circuit 5. The output signal is not generated while the same code signal is applied to the comparison circuit 5. The output signal S1 is generated only when no code is received at the first input terminal, and the output signal S1 is supplied to the first input terminal of the logic circuit 6. The second input end of the logic circuit 6 is connected to the evaluation circuit 10, in which the output signal S2 is generated from the composite image signal. The matching of the comparison circuit 5 is not notified (signal S1), there is no FBAS signal (S2), and the inquiry circuit 7 is started by the logic circuit 6.

The inquiry circuit 7 sets the program locations filled with stations in the memory 8 in a predetermined order. If a transmitter with a code matching the code stored in the memory 4 is found, the inquiry process is interrupted and the found transmitter is set for another reception.

In another possible variant, the setting of the alternative transmitter is made by field strength assessment of the transmitter set by the inquiry circuit 7. The field strengths and codes of all transmitters that can be set for this are queried, providing the best reception and the transmitter can be set. In this case, a microprocessor is installed in the evaluation circuit 10, and the signal generated by the logic circuit 5 together with the composite image signal for the evaluation of the magnetic field is connected to the microprocessor through the connection line indicated by the broken line for the evaluation. Supplied. In addition, after the detection of the optimal alternative transmitter, the inquiry process is stopped through the connection line indicated by the broken line between the evaluation circuit 10 and the inquiry circuit 7.

It is also possible to repeat the inquiry process at regular time intervals in order to re-establish the originally provided transmitter which should be received in some cases after the setting of the alternative transmitter. However, since such an inquiry by a device having only one tuner means another interruption such as interruption of recording, it is preferable to install a second tuner for setting for this possibility.

Claims (7)

A programming device for switching on the set for receiving and / or recording a program of the selected transmitter, wherein the program can be evaluated by a characteristic code (timecode) according to the VPS system and is receivable, in particular a stored transmitter In a television set, in particular a video recorder, in which the selection circuit 9 for (8) is provided in the set, a program source code for characterizing the transmitter provided in accordance with the VPS system in addition to the time code associated with the program is provided in the set. A transmitter having a characteristic code (time and program source code) that can be evaluated and that matches the received code of the selected program upon blocking of the selected transmitter that appears after the start of the program by the selection circuit 9 for further reception. TV set, characterized in that automatically set. 2. The selection circuit (9) according to claim 1, characterized in that the selection circuit (9) compares the memory (4) into which the characteristic code of the program is read at the start of the selected program, and the stored code with the received code and, if no code is received, the control signal ( And a comparison circuit (5) for outputting S1). The television set according to claim 1 or 2, wherein the composite image signal is evaluated as another criterion for the blocking of the selected program, from which the control signal (S2) is derived. 4. The logic circuit according to claim 3, wherein a logic circuit 6 is connected after the comparison circuit 5, and the logic circuit 6 is output from the switching signal S2 derived from the composite image signal, and from the comparison circuit 5. A television set characterized in that a signal S1 is supplied. 5. A television set according to claim 4, characterized in that the control circuit (7) for inquiry of the receivable transmitter (frequency) stored by the control signals (S1, S2) can be operated. 2. A transmitter according to claim 1, characterized in that a transmitter can be set which can be selected when a plurality of receivable transmitters with matching codes are selected a) by a predetermined order of storage location designation or b) by an evaluation of the received field strength. TV set playing. A television set according to claim 1, wherein a second tuner for setting purposes is provided in the set.