JPH0581734A - Recording speed switching method of timer recording - Google Patents

Abstract

PURPOSE:To perform a speed switching without destroying the contents of a program and to suitably perform a timer recording by switching the recording speed during the gap in a program prior to the last position of a low speed mode switching when timer recording at a standard record mode and the remaining time of the recording medium becomes low. CONSTITUTION:A microcomputer 1 receives the signals from a timer 3 in which a recording is set by a key 2 and the signals from a supply side reel FG5 of a tape 4 and a take up side reel FG6 and computes the amount of tape remained and during a timer recording, controls a servomechanism circuit 8 of a tape driving motor 7 based on the time till the end of a recording and the amount of time remained in the recording media. If the amount of time remained in the tape 4 is not sufficient, the recording speed is switched to the low speed mode in the commercial section which is earlier in time than the last position of a speed switching.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to a recording / recording device such as a VTR or a DAT, and when recording a timer in a standard speed recording mode, the recording speed is adjusted according to the remaining time of a recording tape or the like. The present invention relates to a method of switching to low speed recording.

[0002]

2. Description of the Related Art In a recording / recording apparatus of this type, when performing timer recording in a standard speed recording mode (referred to as a standard mode), the remaining time of a recording tape or the like with respect to the time until the timer recording ends. It is known to automatically switch the recording speed to a low speed recording mode (for example, a triple mode) when it is determined that the recording speed is insufficient. That is, during recording in the standard mode, the remaining recordable time of the tape or the like is obtained by multiplying the remaining time obtained by reel calculation (performed using a microcomputer or the like) by 3 in the triple mode.
On the other hand, the time until the recording end time set by the timer is obtained. From these, when it is judged that the former is smaller than the latter, the mode is switched to the low speed mode.

A flow chart of this conventional automatic speed switching method is shown in FIG. To briefly explain this, in the standard mode (SP) (YES in # 11), after waiting for a fixed time (# 12), the remaining tape time T is obtained by reel calculation using a microcomputer or the like (# 13). Next, T is tripled to set the remaining time A (# 14), and the timer remaining time t is calculated (# 15). Next, check whether it is the tape end or the stop (# 16), and if not,
It is determined whether A is t or more (# 17). If the determination is NO, the standard mode (SP) is switched to the triple mode (LP) (# 18).

[0004]

FIG. 4 shows the positions on the tape when such a conventional recording speed switching method is performed. Here, it is assumed that the timer recording program part (P) is interrupted at an appropriate interval (for example, about 15 minutes) due to the presence of the commercial part and the inter-track part (C). Even in this case, the switching position (X) is often switched during the recording program (P). When the tape recorded in this way is reproduced, the tracking is lost at the switching position (X), and as a result, the screen and audio are disturbed and the necessary recording program is broken in the middle. It should be noted that there is a system in which recording / recording is stopped at this time by utilizing the fact that the signal in the commercial section and the inter-track section (C) is often different from that in the program section (P). The present invention solves the above-mentioned problem, and when the remaining time of the recording medium is insufficient during timer recording in the standard mode, the speed switching from the standard mode to the low speed mode is performed without destroying the program content. It is an object of the present invention to provide a recording speed switching method for timer recording that enables appropriate timer recording.

[0005]

In order to achieve the above object, the present invention is to end recording during timer recording in standard recording mode when the program content of a program is interrupted at appropriate intervals during timer recording. Until the recordable remaining time of the recording medium is compared, it is determined that the former is longer than the latter, and within the predetermined time that is faster than the timing that requires switching from the standard recording mode to the low-speed recording mode. The recording speed switching method for timer recording is such that the recording speed is switched at that time if the program content is interrupted.

[0006]

According to the above method, when the remaining time of the recording medium is insufficient during the timer recording in the standard recording mode, the timing is faster than the final position which requires switching to the low speed recording mode from the standard recording mode, The recording speed is switched using the time when the program contents are interrupted. Therefore, the recording speed is not changed in the middle of the program and the contents are not destroyed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the basic structure of a recording apparatus such as a VTR in which the recording speed switching method for timer recording according to the present invention is implemented.
The microcomputer 1 for controlling the whole of the apparatus receives a signal from the timer 3 set to record by the key 2 and a signal from the supply side reel FG5 and the take-up side reel FG6 of the tape 4, and performs so-called reel calculation. The remaining amount is detected, and the servo circuit 8 of the tape drive motor 7 is controlled based on the time until the end of recording during the timer recording and the remaining recordable time of the recording medium. Although a signal processing circuit and the like for recording and recording on the tape 4 are not shown, the target of timer recording is the program content of the broadcast,
It is assumed that the program contents include commercials, tunes, and the like (hereinafter described as commercials) that do not particularly require recording at appropriate intervals (for example, about 15 minutes).

FIG. 2 is a flowchart of the automatic speed change method executed by the microcomputer 1, and FIG. 4 shows the position on the tape in that case. In FIG. 2, first, the standard mode (S
If P) (YES in # 1), after waiting for a certain time (# 2), the remaining tape time T is obtained by reel calculation using a microcomputer or the like (# 3). Next, T is tripled to be X, the period (a) for detecting the commercial section (C) between the program parts (P) is set to 15 minutes (900 seconds), and X-900 is the start of the detection period. Time A (#
4). Further, the remaining time t of the timer is calculated (# 5). Next, it is checked whether it is the tape end or the stop (# 6), and if not, it is determined whether A is t or more (# 7). If this determination is NO, it is determined whether X is t or more (#). 8). If this determination is YES and there is a commercial section (#
If YES in step 9), the mode is switched from the standard mode (SP) to the triple mode (LP) earlier (# 10). The switching position at this time is the "speed switching final position" in FIG. When the commercial section (C) is not found within the commercial detection period (a), when the determination at # 8 is NO, the switching process is performed at # 10 as in the conventional case. The switching position at this time is the "speed switching initial position" in FIG.

As a result of the above processing, as shown in FIG. 4, if the commercial section (C) is found within the commercial detection period a after the start time A of the commercial detection period,
At that time, the recording speed is switched. In this way, since the recording speed is switched to the commercial section (C), even if the tracking is lost and the image or sound is disturbed, the program section (P) to be recorded is not affected.

[0010]

As described above, according to the present invention, when the program content of the program is interrupted at appropriate intervals during timer recording, the remaining time of the recording medium is sufficient during timer recording in the standard mode. If it is judged that there is not, and if it is necessary to switch to the low-speed recording mode, if there is a section where the program content is interrupted earlier than that timing, the recording speed will be switched in that section, so it is appropriate without destroying the program content. Timer recording can be performed.

[Brief description of drawings]

FIG. 1 is a block diagram of a specific configuration of an apparatus for carrying out the method of the present invention.

FIG. 2 is a flowchart showing the procedure of the method of the present invention.

FIG. 3 is a diagram showing a position on a tape for a conventional recording speed switching.

FIG. 4 is a diagram showing positions on the tape of recording speed switching according to the present embodiment.

FIG. 5 is a flowchart showing a procedure of a conventional method.

[Explanation of symbols]

 1 Microcomputer 3 Timer 5 Supply side reel FG 6 Takeup side reel FG 8 Servo circuit

Claims (1)

[Claims] 1. In timer recording, when the program content of a program is interrupted at appropriate intervals, the time until the end of recording and the remaining recordable time of the recording medium are recorded during timer recording in the standard recording mode. If the former is judged to be longer than the latter and the program content is interrupted within a predetermined time that is faster than the timing that requires switching from the standard recording mode to the low speed recording mode, the recording speed at that point A recording speed switching method for timer recording, characterized in that the recording speed is switched.