JPH06302166A - Display controlling device - Google Patents

Abstract

PURPOSE:To make a highly accurate counter display on each mode transition process by independently measuring first and second counters inside the device, holding them in a memory consecutively, correcting them and displaying them. CONSTITUTION:A linear counter as the first counter and a real time counter as the second counter are independently measured inside the device and consecutively held in the memory. During each mode transition process, the measuring error of each counter is evaluated, corrected to a highly accurate counter value and displayed on a counter display section 5. In this case, since the real time counter is real time being reproduced on a tape and measured from a reference signal gained from the clock accuracy of crystals, etc., by a microcomputer, time display with few errors is gained. Also, the reel pulses of tape supplying and winding sides are measured by the linear counter. Then, since the display is carried out considering the measured error of each counter and switching it, more accurate display is carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display control device for a recording / reproducing device having a counter.

[0002]

2. Description of the Related Art Among time displays, there is a first counter (hereinafter referred to as a linear counter system) which displays a specific calculation formula and a measuring method for calculating a current position on a recording medium. In order to display the current position on the recording medium, for example, when the medium is a tape, by measuring the tape supply side, the winding side reel pulse, etc.,
It is common to display time. However, due to the error of the tape length, the error of the thickness of the tape, the error of the hub diameter for winding the tape on the feeding side and the winding side, etc. It often occurs.

In addition, the elapsed time, not the time on the recording medium, is calculated by another method, and the recording / reproducing time is displayed.
There is a counter (hereinafter called real-time counter method). This method is generally calculated and displayed based on a highly accurate reference clock, but when the recording medium is not running at a speed that can be specified, that is, the speed of the recording medium,
If the amount of movement per time cannot be specified, the relationship between the actual position on the recording medium and the displayed time is unknown or inaccurate, and time display is impossible or inaccurate time display. Something went wrong.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a counter display suitable for actual use in each mode transition process in order to solve the above-mentioned problems of the prior art. .

[0005]

Therefore, in the present invention, the linear counter and the real-time counter are independently measured inside the device and stored in the memory, and in each mode transition process, the measurement error of each counter (the above-mentioned linear counter , The error of the real-time counter) is evaluated and corrected to a more accurate counter value and displayed.

[0006]

By utilizing the characteristics of each measuring method, it is possible to perform a more accurate counter display in each mode transition process.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the present invention, the structure used in a tape recorder will be described with reference to the block diagram of FIG. In the figure, the tape recorder drives the tape in response to a signal from the operation section 1 and the operation section 1 for operation,
In addition, the microcomputer 2 is displayed on the counter display unit 5, the control unit 3 controls the tape by the signal of the microcomputer 2, the tape drive unit 4 which executes a predetermined operation by the signal of the control unit, and the counter display unit 5. Has been done. Then, the display counter state transition which is the main part of the present invention will be described with reference to the flowchart of FIG.

At present, the tape drive device is in the state at the start of reproduction. (S1) Both the internal real-time counter and the linear counter are set to the initial state of [00:00], and the counter memory operation is set in order to locate this position later.
In this state, since the tape drive is in the reproducing state, it is possible to display the measurement time inside the microcomputer, and the real-time counter [00:00] is displayed on the display section based on this. (S2) From this state, when the tape advances at a constant speed, the real-time counter measures the real time inside the microcomputer, and every moment,
The internal real-time counter value is displayed on the display.
(S3)

Here, the real-time counter is the real time of reproduction on the tape, and is measured by the microcomputer from the reference signal obtained from the clock accuracy of the crystal, etc.
Time display with less error is possible. Further, the internal linear counter measures the time proportional to the tape running amount by the tape pulse, but in order to measure the linear counter value, the tape pulse on the supply side of the tape and the reel pulse on the winding side are measured. However, this internal linear counter is different from the actual position on the tape due to the difference in the tape length error, tape thickness error, hub diameter error that winds the tape on the supply side and the winding side. , Because of the error in the display, the value will be different from the real-time counter value.

In the stopped state, the real-time counter value is an accurate reproduction time (for example, 15:30) because the tape is running at a constant speed. However, a measurement error occurs in the linear counter value (for example, 15:15), and an accurate difference between the real time and the value on the tape occurs. (S4) (S5) If the rewinding operation is started from this state, the tape will be non-constant during rewinding, so accurate measurement cannot be performed with the real-time counter, so the external display will be a linear counter display. . (S6)

At this time, if there is an error between the display of the linear counter and the display of the real-time counter, the subtraction start time is set to the display time of the stopped state measured by the real-time counter (for example, 15:30). (S7) (S8) As a result, the switching point between the real-time counter and the linear counter does not become discontinuous as the display time, and the time display does not appear unnatural.

During the rewinding operation, the subtraction of the display unit subtracts the counter of the display unit by the subtraction amount of the linear counter. 0
0:15) is displayed in a corrected state. (S9) (S10)

Next, the counter display during operation using the counter memory will be described with reference to the flowchart of FIG. In this embodiment, as a continuous operation of FIG. 2, a process of automatically stopping operation when the linear counter value is [00:00] in the rewinding state will be described.

The value of the linear counter is [00:00]
Then, it will be automatically stopped. (S11) (S12) At this time, the real time counter is [0
It is not 0:00] but is [00:15].
(S13) Real time counter [00:00] after automatic stop
Set again. (S14)

As a result, the display parts of the real-time counter and the linear counter become equal, and the subsequent tape operation state becomes equal to the display part of the counter. The same process is performed when the tape is automatically stopped at the start and end of winding. In this way, the display is automatically switched in consideration of the measurement error of each counter in the memory stop operation.

Next, FIG. 4 shows a flow chart when the tape is inserted and the non-constant speed mode is first set. This state is, for example, FF / REW or CUE immediately after inserting the tape.
It is assumed that a mode such as / REV is selected. Figure 4
Now, the case of immediately setting the FF mode will be described. Select non-constant speed mode when inserting the tape. (S15) The counter display is the measured value of the linear counter.
(S16) The initial value of the real-time counter is set to the value of the linear counter. (S17) When shifting from the non-constant speed mode to the constant speed mode, the initial value of the real-time counter is set to the value of the linear counter. (S18) (S19) (S20) Playback is started, and the process proceeds to the flowchart of FIG. (S
1)

FIG. 5 is a flow chart when the reproduction is first started in the middle of the tape. This state is
It is assumed that the recording or playback mode is selected while the tape is partially wound. Select the playback start mode first in the middle of the tape. (S2
1) The measured value of the real-time counter is displayed, but the initial value is the value of the linear counter. (S22) Playback is started, and the process proceeds to the flowchart of FIG. (S
1)

Next, FIG. 6 shows a flowchart when the non-constant speed mode is first set in the middle of the tape. In this state, the tape is partially wound and the non-constant speed mode is selected. Select non-constant speed mode first in the middle of the tape. (S23) The process moves to the flowchart of A in FIG. (S15) At this time, the initial value of the real-time counter is preset to the value of the linear counter, and the measured value of the linear counter is displayed by the tape pulse.

Next, the counter display when the counter is reset in the reproducing state is shown in the flowchart of FIG. Reset the counter while playing. (S24) The process proceeds to the flowchart of FIG. 2 and the reproduction is continued. (S
1) At this time, the real-time counter and the linear counter are reset and the value of the real-time counter is displayed.

Next, the counter display when the counter is reset in the non-constant speed mode is shown in the flowchart of FIG. Reset the counter in non-constant speed mode. (S25) The procedure moves to A in the flowchart of FIG. (S15) At this time, both the real-time counter and the linear counter are reset and the value of the linear counter is displayed.

[0021]

As described above, according to the present invention, the linear counter and the real-time counter are independently measured inside the device and stored in the memory, and the measurement error of each counter is considered in each mode transition process and counter memory transition process. By switching the display above, it is possible to display the counter according to the actual use, and more accurate display is possible.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the present invention.

FIG. 3 is a flowchart for explaining the present invention.

FIG. 4 is a flowchart in each mode of the embodiment according to the present invention.

FIG. 5 is a flowchart in each mode of the embodiment according to the present invention.

FIG. 6 is a flowchart in each mode of the embodiment according to the present invention.

FIG. 7 is a flowchart in each mode of the embodiment according to the present invention.

FIG. 8 is a flowchart in each mode of the embodiment according to the present invention.

[Explanation of reference numerals] 1 operation unit 2 microcomputer 3 control unit 4 tape drive unit 5 counter display unit

Claims (1)

[Claims] 1. A specific formula for calculating the current position on a recording medium,
In a recording / reproducing apparatus including a first counter indicated by a measuring method and a second counter for calculating elapsed time on a recording medium and displaying recording / reproducing time, The second counter is independently measured inside the recording / reproducing apparatus and sequentially stored in the memory, respectively, and the counter value having higher accuracy is displayed in each mode transition process, and the difference is measured as the correction amount, A display control device, wherein the correction amount is arithmetically processed and displayed at the time of transition to another mode.