JPH0520730A - Timer reservation setting circuit - Google Patents

Abstract

PURPOSE:To effectively use a tape whose nonrecorded residual amt. is little by possessing a tape residual amt. detecting circuit for detecting a residual amt. of a recording tape and a ticking width setting circuit for varying the ticking time width in accordance with an output of the tape residual amt. detecting circuit. CONSTITUTION:When a setting switch 8 is pressed once, a value of an ending time counter 7 is changed each time by a value set by the ticking width setting circuit 3. Ticking width (time width) of the ending time counter 7 to be counted up or counted down by pressing the setting switch 8 each time is set as large when the nonrecorded residual amt. is large based on information from the tape residual amt. detecting circuit 1, and as small when the nonrecorded residual amt. is little. A value counted by the ending time counter 7 is sent to a timer reservation control circuit 6. Video recording starting time data and video recording ending time data, sent to the timer reservation control circuit 6 are stored in a storage circuit 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a timer reservation setting circuit mainly used for recording operation of a video tape recorder (hereinafter referred to as VTR).

[0002]

2. Description of the Related Art Conventionally, in a VTR recording operation, in order to easily set a timer reservation, mainly a recording start time and an end time can be set by simply pressing a switch a plurality of times, so-called one-touch. There was a function called a timer.

In the reservation setting by the one-touch timer, the setting step width (time width) of the end time is set to be relatively coarse such as 30 minutes or 1 hour in order to give priority to simplicity.

[0004]

As described above, in the so-called one-touch timer function of the related art, the recording end time is set roughly, so when the magnetic tape with a small unrecorded remaining amount is to be effectively used, the tape is overloaded. It was inconvenient to rewind and prepare for the next recording after each recording. The present invention has been proposed to solve such a problem, and provides a timer reservation setting circuit that enables a tape having a small unrecorded remaining amount to be effectively used.

[0005]

In order to achieve the above object, the present invention provides a timer reservation setting circuit of a tape recording apparatus capable of setting a period in which a timer recording operation is performed with a predetermined time interval. The present invention is characterized by having a tape remaining amount detecting circuit for detecting the remaining amount and a step size setting circuit for changing the step time width according to the output of the tape remaining amount detecting circuit.

[0006]

According to the above-described structure, the step width for setting the timer recording operation period is set to be small when the unrecorded remaining amount is small according to the output of the tape remaining amount detection circuit.
You can use the tape with less unrecorded capacity more effectively.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete embodiment of a timer reservation setting circuit according to the present invention will be described below in detail with reference to the drawings. In Figure 1,
An embodiment in which this timer reservation setting circuit is applied to a VTR will be shown.

In this figure, the remaining tape amount detection circuit 1 detects the unrecorded remaining amount of the recording tape 2. The remaining amount of unrecorded tape is detected by detecting the difference in rotational speed between the tape take-up reel and the delivery reel. The output of the tape remaining amount detection circuit 1 is supplied to a step size setting circuit 3 described later.

The recording start time setting switch 5 connected to the start time counter 4 sets the recording start time in the one-touch timer function. Each time the setting switch 5 is pressed, the start time counter 4 counts and the value is sent to the timer reservation control circuit 6.

The recording end time setting switch 8 connected to the end time counter 7 via the step size setting circuit 3 sets the recording end time in the one-touch timer function. When the setting switch 8 is pressed, the value of the end time counter 7 changes by the numerical value set by the step size setting circuit 3 each time the setting switch 8 is pressed. The step width (time width) of the end time counter 7 that is advanced or lowered each time the setting switch 8 is pushed once is large when the unrecorded remaining amount is large, based on the information from the tape remaining amount detection circuit 1, and is not set. If the remaining recording capacity is low, it will be set to a smaller value. The numerical value counted by the end time counter 7 is sent to the timer reservation control circuit 6. The recording start time data and the recording end time data sent to the timer reservation control circuit 6 are stored in the storage circuit 9.

The timer reservation control circuit 6 sends a recording start control signal to the video recording control circuit 10 at the recording start time based on the data stored in the storage circuit 9, and the recording tape is controlled under the control of the control circuit 10. Recording starts at 2. When the recording end time comes, a recording end control signal is sent to the video control circuit 10 to end the recording operation on the recording tape 2.

[0012]

As described above, according to the present invention, the unrecorded remaining amount of the tape is detected, and when the unrecorded remaining amount of the tape is large, the increment time width of one count of the end time counter is increased. When the setting is made and the unrecorded remaining amount is small, the step time width is set to be small, so that the tape with a small unrecorded remaining amount can be used more effectively. Therefore, it is possible to eliminate the inconvenience of rewinding an excessively unrecorded tape, which has been conventionally done, after recording is completed.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment in which a timer reservation setting circuit according to the present invention is applied to a VTR.

[Explanation of symbols]

 1 tape remaining amount detection circuit 2 recording tape 3 step size setting circuit 4 start time counter 5 recording start time setting switch 6 timer reservation control circuit 7 end time counter 8 recording end time setting switch 9 memory circuit 10 video recording control circuit

Claims (1)

Claim: What is claimed is: 1. A timer reservation setting circuit of a tape recording apparatus capable of setting a period for performing a timer recording operation with a predetermined time interval, and detecting a remaining tape amount for detecting the remaining amount of the recording tape. A timer reservation setting circuit having a circuit and a step size setting circuit that changes the step time width in accordance with the output of the tape remaining amount detection circuit.