JPH0553039B2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention is used in a cassette tape recorder, etc., and is configured to record a blank space for cueing and address data on a tape position management track on a tape. The present invention relates to a tape cue position determination device.

<Prior art> In this type of conventional tape cue position determining device, in order to quickly cue the specified audio recording portion, a blank area is created for cueing and a number is assigned to the blank area. At the same time, the target audio is recorded immediately after the blank space to which the number has been assigned.

However, such a conventional tape cue position determination device has the following problems.

In other words, create a blank section for each recording →
It is essential to perform sequential operations such as number assignment and recording, and all of this sequential operation must be performed manually, which is burdensome for the operator.

Furthermore, the numbers assigned to blank areas are determined by the number from the beginning of the tape, and once the search operation is interrupted, it is necessary to rewind to the beginning of the tape and then repeat the search operation again, which is extremely troublesome. There are problems in that it is not easy to use and takes a lot of time.

In particular, when such a tape cue position determination device is operated by lower grade students in an educational system, etc., the aforementioned poor operability becomes a major problem.

<Object of the Invention> The present invention was made in view of the above circumstances, and an object of the present invention is to improve the operability for determining the cueing position and to make the cueing operation faster and more accurate. shall be.

<Configuration of the Invention> In order to achieve such an object, the present invention has the following features:
It has the following structure.

That is, the tape cue position determination device of the present invention has an audio track and a tape position management track, and the tape position management track records address data at predetermined intervals along its length. a time difference detecting means for detecting a time difference between a desired cue position on a finished tape and the address data recording position on the downstream side in the running direction of the tape with respect to the desired cue position; Blank area range determination for determining the range in which a blank area is to be recorded in the position management track from a position near the upper side of the tape in the running direction during playback with respect to the desired cueing position to part way up to the desired cueing position. means, a blank recording means for recording a blank on the tape position management track over the blank recording range determined by the blank recording range; and a blank recording means for recording the blank on the tape position management track; and index recording means for recording an arbitrary index for cueing on the tape position management track over a range up to the tape position management track.

<Effect> The effects of this configuration are as follows.

That is, when the desired cue position is determined, the time difference detection means detects the time difference between the desired cue position and the address data recording position on the downstream side in the running direction of the tape with respect to the desired cue position. The blank area range determination means determines the blank area recording range based on the time difference. The blank recording range is within the range from a position near the upper side of the tape in the running direction during reproduction with respect to the desired cueing position to part way up to the desired cueing position.

The blank section recording means records a blank section on the tape position management track over the determined blank section recording range. Further, the index recording means records an index for cueing on the tape position management track over the range from the end position of the blank recording range to the desired cueing position. This index may be arbitrarily selected regardless of the recording order.

As described above, simply by determining the desired cueing position, blank areas and indexes are automatically recorded, so that the operability for determining the cueing position is improved.

In addition, since the index can be selected regardless of the recording order, even if the search operation is interrupted, there is no need to rewind to the beginning of the tape and repeat the search operation again. Since there is a blank area, it is possible to search up to the blank area at high speed, thereby making the search faster and more accurate.

<Example> Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 1 is a block circuit diagram of a tape cue position determination device, and FIG. 2 is a format of a tape after necessary recording.

In Figure 1, 1 is a microcomputer.
CPU, 2 is a memory, 3 is a cassette tape, 4 is a tape position management track head, 5 is an audio track head, 6 is a data decoder, 7 is a blank area detection circuit consisting of a diode, a resistor, and a capacitor, 8 is a cassette mechanism, 9 is an editor A timing switch button, 10 a host computer, 11 an audio amplifier, and 12 a speaker.

The track of tape 3 is as shown in FIG.
It is divided into a tape position management track X and an audio track Y.

Address data n, n+ is stored on the tape position management track
1, n+2, n+3, n+4... are written, and data [1] is written in the track portion between all adjacent address data. Such writing is based on instructions from the host computer 10. Data [1] is serial data in which all bits are "1".

The tape position management track head 4 corresponds to the tape position management track X and writes address data sent from the CPU 1 for cueing into the tape position management track X. The tape position management track head 4 also sends blank areas and address data detected from the tape position management track X to the data decoder 6.

If the data decoder 6 outputs the detected blank area to the blank area detection circuit 7, it sends the detected address data to the CPU 1 when the detected address data matches the address data for cueing. The blank area detection circuit 7 sends a blank area detection signal to the CPU 1.

The edit timing switch button 9, when pressed, sends a cue timing signal to the CPU 1. The host computer 10 is in charge of overall control for cue editing.

As shown in FIG. 2, the time of each address data is t1, and the time of each data [1] is t2. Regarding these times t1 and t2, for convenience of explanation, t1 = 1 (second) and t2 = 3 (seconds) as an example.

Y is an audio track, and the numbers "0" to "18" represent the audio content in time (seconds).

Next, the operating instructions for cueing and the CPU
Operation 1 will be explained.

The cassette mechanism 8 is driven by a command from the CPU 1, the audio signal is picked up from the audio track Y via the audio track head 5, the audio signal is amplified by the audio amplifier 11, and then outputted from the speaker 12, thereby generating the audio track Y. Monitor.

As a result, as the desired position for cuing up one recording part on audio track Y of tape 3,
For example, assume that the position P of the arrow (↑) in FIG. 2, ie, the time point "8" in the audio track Y, is found. In this case, when the arrow (↑) position P arrives at "8", the edit timing switch button 9 is pressed.
By this, CUP1 of the microcomputer
A timing signal is input to.

By inputting this timing signal, CPU1
Reading of address data on the tape position management track X is started via the data decoder 6 from time point "8" indicated by the arrow (↑).

In this case, due to the difference in response speed, there is a case where address data n+2 is read, and a case where address data n+2 is not read and address data n+2 is read.
There are cases where it is read from +3.

First, a case where address data n+2 is not read and address data n+3 is read will be explained based on FIG. 3.

Letting t be the time required to read address data n+3, it is t+5 (seconds).

The CPU 1 writes the read address data n+3 into the memory 2 according to a predetermined program. Next, address data n is sent from memory 2.
+3 and subtract a predetermined integer N from the value n+3 to obtain the read address data n+
3, that is, the address data corresponding to the position where blank section B in tape position management track X should be recorded α=n+3−
Calculate N. Furthermore, the blank space time T is calculated using the following formula.

T={(t1+t2)×N}-t-t1...(1) This formula (1) holds true for the following reason. That is, read address data n+3
The point in time when the sound ends is, in the audio track Y,
It is at the time of “13”. For example, if N is "3", going back by (t1 + t2) x 3 from the time "13" will be the time "1" on the audio track Y where the third previous address data α ends. In other words, time (t1+t2)×3 is the time from time point “1” to time point “13”.

On the other hand, from the time point “13” when the read address data n+3 ends, the address data n+3
If we go back by the time t required to read the
The point P indicated by the arrow (↑) is "8", which is the desired position P. This is {t1+t2)×N}−
This is at time t. At this point {t1+t2)×N}-t
The reason why t1 is further subtracted from t1 is to secure an area on tape position management track X to record new address data En indicating that the blank area B has been edited, that is, that blank area B has been recorded. be. The new address data En is an "index" in the structure of the invention, and an arbitrary value desired by the operator may be selected as this new address data En. This point is an important feature of the present invention.

Now, for CPU1, following the above calculation,
The address data α for recording the blank portion B and the blank portion time T are written into the memory 2.

The predetermined integer N is selected based on the blank area detection ability of the apparatus, and is normally between "3" and "4". Here, the address data α=n should select N=3, and the blank time T is t1
= 1, t2 = 3, N = 3, t = 5, so T
=6 (seconds).

Next, the CPU 1 controls writing and editing of the blank section B on the tape position management track X based on the address data α (=n) written in the memory 2 and the blank section time T.

That is, the tape 3 is rewound, address data is searched at high speed, and a position that matches the address data α (=n) read from the memory 2 is detected.
Stop tape 3. Then, at the same time as tape 3 is sent, blank area B is moved from the position of address data α (=n) to tape position management track X.
is recorded over a blank time T (=6 seconds).
Furthermore, following this recording, new address data indicating that blank area B has been recorded.
En to point “7” in audio track Y
It is recorded on the tape position management track X at the position corresponding to "8".

With the above steps, recording of the blank area B and new address data En required for cueing is completed at the position immediately before the point "8" of the arrow (↑), which is the desired cueing position P. As already mentioned, any value can be selected as the new address data En.

In addition, rewind tape 3 and enter the number of the recording part you want to cue, that is, the new address data En.
After specifying , if you fast forward tape 3,
CPU1 starts a high-speed search operation. That is,
Each time a blank section B comes, the running of the tape 3 is decelerated to the address reading speed, and then address data is searched. If address data other than new address data En is detected through this search, ignore this and proceed to tape 3.
When fast forwarding is resumed and target new address data En is detected, the running of the tape 3 is stopped, and in this state, a playback start command is given.

As a result of the above, the desired cue position on the audio track Y, that is, the cue at time "8" can be quickly and accurately carried out.

Next, the case where address data is read from n+2 will be explained based on FIG. 4.

When the desired position P of the arrow (↑) is slightly before address data n+2, address data n+2 is read first. The time t required for the reading is a little over 1 second. To facilitate understanding, t=1 (seconds)
shall be.

The CPU 1 reads the address data n+2 written in the memory 2, subtracts a predetermined integer N (=3) from the value n+2, and calculates the address data α=n corresponding to the position where the blank part B should be recorded.
+2-N=n-1 is calculated. Furthermore, the blank space time T is calculated using the above equation (1). Formula (1)
Since T={(t1+t2)×N}-t-t1, the blank time T is T=10 (seconds).

Therefore, by the same operation as described above, the CPU
1 is a blank area B from the position of address data α (=n-1) to tape position management track X.
is recorded over a blank time T (=10 seconds).
Furthermore, following this recording, new address data indicating that blank area B has been recorded.
En to point “7” in audio track Y
It is recorded on the tape position management track X at the position corresponding to "8".

As mentioned above, in this example, the arrow (↑)
Depending on the position, the blank time T changes in the range of 6 to 10 seconds. In order for this time range to be the time at which blank part B can be detected in high-speed search,
Time t1, t2 and a predetermined integer N value are set.

Other operations are the same as in the case of FIG. 3, so explanations will be omitted.

In the above embodiment, data [1] between adjacent address data is cylinder data in which all bits are "1", but this data may be serial data in which all bits are "0".

Furthermore, the memory 2 is connected to the host computer 10.
By including the memory 2 in the illustrated state, the memory 2 itself may be omitted.

<Effect of the invention> According to the present invention, the following effects are achieved.

In other words, in the case of the conventional example, for each recording,
The sequential operation of creating a blank section → assigning a number → recording is essential, and all of this sequential operation had to be performed manually.However, according to the present invention, all that is required is to determine the desired cue position. Since blank areas and indexes can be automatically recorded, the operability for determining the cue position can be improved.

In addition, in the conventional case, numbers for blank areas were assigned according to the recording order, so if the search operation was interrupted once, the search operation had to be repeated after rewinding to the beginning of the tape. On the other hand, according to the present invention, since the index can be selected regardless of the recording order, even if the search operation is interrupted once, there is no need to rewind to the beginning, and the search can be performed from just before the beginning of the recording part you want to play. Furthermore, since there is a blank section before the index, it is possible to search up to the blank section at high speed.
Accuracy can be achieved.

[Brief explanation of the drawing]

1 to 4 relate to embodiments of the present invention,
Figure 1 shows the block circuit diagram of the tape cue position determination device, Figure 2 shows the format of the tape after the necessary recording has been completed, and Figures 3 and 4 show the format of the recorded tape with blank sections written. It is formatted. 3...tape, X...tape position management track, Y...audio track, n, n+1, n+2...
...address data, α...address data, P...
...desired cue position, B...blank area, En...new address data (index).

Claims (1)

[Scope of Claims] 1. A request to locate the beginning of a recorded tape that has an audio track and a tape position management track, and address data is recorded at predetermined intervals along the length of the tape position management track. and time difference detection means for detecting a time difference between the desired cue position and the address data recording position on the lower side in the tape running direction during playback, based on the time difference, creating a blank section in the tape position management track. Blank area determining means for determining a recording range from a position near the upper side of the tape in the running direction during playback with respect to the desired cueing position to part way up to the desired cueing position; blank recording means for recording a blank on the tape position management track over the blank recording range determined by the determining means; A tape cue position determination device comprising: index recording means for recording an arbitrary cue index on the tape position management track.