JPS6238547A - Method and apparatus for automatically searching and reproducing records separated from each other by rest part on information carrier - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention is directed to automatic search (so-called cueing) of recordings separated by pauses on an information carrier (recording tape) such as a cassette of a cassette recorder. Regarding the method. In this case, the pauses form the search criteria and the tape is fast forwarded for the search and when a pause is detected the fast forward operation is turned off. Furthermore, the invention relates to a device for carrying out all of the above methods. When using a recording/playback device, you often want to listen to the entire part you are currently listening to (for example, a music recording), or you want to go beyond that part and play the next recording in its entirety.For example, when playing a car, It would be convenient for the driver if the on-board cassette recorder could do this.

BACKGROUND OF THE INVENTION A device or a method for providing the above-mentioned functions in an audio tape is known from DE 193 0 229 A1.

It is the so-called Cassette Program Search System (CPS). CPS takes advantage of the fact that, similar to the multiple recordings recorded on a vinyl record, the multiple recordings recorded on a recording tape by a Recording Z-Decassette are usually separated by pauses lasting several seconds. ing.

In both cases mentioned at the beginning (skipping over the recording or listening to the recording again), Techi is first fast-forwarded forward or backward. In known CPS devices, when a pause is reached, the fast-forward is performed during this pause. Automatic switching takes place from to normal speed driving for regeneration operation.

However, known CPS devices have the disadvantage that the fast-forwarding speed cannot be increased too much since there is a risk of information loss if the fast-forwarding speed is too high. Next, if you want to listen to the next song without listening to the end of the song you are currently listening to, we will explain the entire selection.

When the fast forward operation is turned on, the recording key 7° is fast forwarded forward until the 098 circuit detects the next pause. This pause is followed by the desired song (if the forward speed is too thick, the delay time that is unavoidable causes the playback to be performed at a timely time, i.e. during the pause, the fast-forward operation is turned off, and the normal forward speed runs). Unable to switch to operation.

In the above example, the playback of the desired song begins only after the pause in terms of time, which is too slow and results in the loss of the initial portion of the song. This information loss is particularly likely to occur when the fast forward speed is relatively high and the pauses are short.

Even when reproducing a song that has been listened to, it is undesirable for the tape running speed to be too fast.

In other words, if the pause part is skipped due to the above-mentioned time constant when driving in the opposite direction at high speed, the end of the previous song will be played first before the pause part ends and you can listen to the desired song. Undesirable.

For the above-mentioned reasons, until now in cassette recorders the overall rapid traverse speed has been relatively small and a separate rapid traverse transmission has not been used. Instead, a conventional forward traverse transmission is used for all rapid traverses, and with this conventional forward traverse transmission there is a limit to the rewinding speed.

On the other hand, there is a growing desire to increase the fast-forwarding speed to shorten the total rewinding time, especially when rewinding a cassette. There are two mutually contradictory requirements.

Problems to be Solved by the Invention It is an object of the present invention to provide a method for increasing the fast-forwarding speed in order to eliminate the above-mentioned drawbacks and at the same time not causing any information loss in the c'ps circuit, and to implement this method. Our goal is to provide equipment for

Means for overcoming the problem The above-mentioned object was solved in the method according to the generic part of patent claim 1 by means of the following method steps.

In the case of forward fast forwarding, this forward fast forwarding function is canceled by a reversing circuit or a reversing pulse.

A recording tape runs at normal running speed until it detects a pause in the direction opposite to the previous forward fast forward.

The rear wheel is switched to the opposite direction by a new reversal signal while remaining in normal running for regeneration operation.

The main feature of the invention is the combination of the basic idea of the 098 circuit, which is known per se, with a reversing circuit, which is also known in cassette recorders. By doing so, the above-mentioned information loss can be automatically corrected in the case of forward fast forwarding, so that the fast forwarding speed can be arbitrarily increased within a technically permissible range. The automatic correction effect according to the present invention can ensure that information loss does not occur in the above case.

The forward rapid forward movement is canceled by the reversing circuit and then switched to running at the normal forward speed, so that the recording tape performing the reverse movement continues in the opposite direction of the previous rapid forward movement until it reaches the previously skipped pause. Run at normal feed rate. A new reversing switch then takes place. That is, since the recording tape is played back by running in the initial direction at a normal feed speed, the desired music piece can be listened to from the beginning and no information loss occurs. It is therefore clear that the invention allows the speed of rapid forwarding to be increased considerably and advantageously to reduce the rewinding time. This was made possible by the innovative means of combining the CPS circuit with a full reversal circuit.

The method of reverse fast forwarding according to the invention as defined in claim 3 is characterized by the following method steps.

In the case of fast forwarding in one reverse direction, this fast forwarding is a reverse operation, and the fast forwarding operation in the reverse direction is canceled by a reversing circuit.

One recording tape is played back by running at a normal running speed in the opposite direction to the previous reverse fast-forwarding.

In both of the above cases, the muting circuit will turn on as soon as the forward fast-forward key or the reverse fast-forward key is actuated, and the previously jumped pause will be returned to normal running speed. It is preferable that the vehicle be turned off again when the target is reached again. While automatically searching for the desired song, the muting circuit is activated to ensure that no sound is produced until the desired song is reached.

That is, according to the present invention, the rewinding speed, which has been relatively small until now, can be considerably increased, and at the same time, the CP rewinding speed can be increased without any information loss.
All S circuits can be used.

A device for carrying out the entire method of the invention is defined in claim 7.

EXAMPLES The present invention will be explained in detail below based on examples shown in the drawings.

The cassette recorder shown schematically in FIG.
0, IJ-ru stands 12 and 14 and a motor 16.

For driving purposes, a drive belt 18 is applied to the motor 16, which is guided around the deflection roller 2-Ot and wrapped around two flywheels 22. When the idler 24 with the bearing lever 26 is positioned as shown, the upper reel stand 12 is driven. Furthermore, the cassette recorder has a reversing slider 28 and a reversing switching wheel 30f, so that reverse operation is possible. It is well known that in this way it is possible to switch to the other side of the cassette or to another track while driving without removing the cassette. The running direction of the tape is then switched to the opposite direction. The fast forward lever 4 is attached to the reverse slider 28.
The fast forward spring 32 at the end of 2 engages. Furthermore, a special fast-forward drive device having all the fast-forward wheels 40 is provided, and the double arrow indicates that the fast-forward wheels 40 move the upper reel stand 1
2 or the entire lower reel stand 14 can be selected. Reference numeral 38 indicates the neutral point for the rapid traverse wheel 40.

Furthermore, the cassette recorder has a full fi-sound head 34, which is mounted on a recording head carrier.

For fast forward operation, the cassette recorder has a forward fast forward key (SV) 52 and a reverse fast forward key (SR) 54. The fast forward keys 52 and 54 are connected to the muting circuit 4
4.

The cassette recorder has a CPS circuit 48, and a CPS key 50 for operating the CPS circuit is attached. That is, the CPS circuit 48 operates only when the CPS key 50 is operated.

Finally, the cassette recorder has a correction circuit 46. The function of correction circuit 46 will be explained later in connection with reversal operation. The correction circuit 46 is also connected to the fast forward keys 52 and 54 to act on these keys, and is connected to the CPS circuit 48 and the muting circuit 44. Next, the operation process of the present invention will be explained based on FIG. 2. In this diagram, it is assumed that recordings, for example, music recordings, which are separated from each other by pauses 58 are recorded on the recording tape 56.
Suppose you want to listen to the second song following song 8.

Said initial state is illustrated in FIG. 2a.

Arrow P indicates the position of the stationary recording head relative to the recording tape 56. The recording tape 56 travels in the direction of arrow B, which indicates forward normal forward travel, and performs a reproducing operation.

CPS circuit 4 B is activated.vCPS
=ll--50 is activated] When the forward fast-forward is activated by the forward fast-forward key 52, the playback operation is immediately switched to the muting operation by the muting circuit 44. The recording head 34 is placed in the null CPS position, ie, the recording head 34 is some distance from the recording tape 56 and has little, if any, contact with the tape.

Furthermore, the normal feed running wheel (idler 24) is released from engagement and the rapid feed wheel 40 is engaged.

FIGS. 2A and 2C illustrate the rapid forward movement of the tape over the pause 58. In other words, after the CPS circuit 48 detects the pause portion 58 k in FIG. 2, the recording tape 5
A certain amount of response time passes until 6 stops. When the pause portion 58 is detected, the forward fast forwarding of the recording chip f56 is activated by the reversing circuit (correction circuit 46), and as a result,
The recording tape 56 is advanced in reverse, as indicated by the arrow, at a normal forward speed in a direction opposite to the direction of previous playback, or in a direction opposite to the direction of arrow C for forward fast forward. This is shown in Figure 2d. The recording tape 56 runs in the direction of the arrow and performs a reverse operation. When the rest portion 58 is reached after the correction time t, the reversing circuit is activated again. That is, the running direction of the tape is switched again and at the same time the muting circuit ceases to operate. The tape is then taken through its first forward normal feed B' as shown in FIG. In this case, there is no information loss that occurs when switching directly to playback operation after the tape has stopped running in FIG. 2C. In the cassette recorder, fast forward is operatively assigned to corresponding activation keys, namely forward fast forward key 52 and reverse fast forward key 54. This functional assignment can be achieved by modification circuit 46. That is, actuation of the forward fast-forward key 52 will cause a correct forward fast-forward operation, regardless of which side of the recording tape or which track is being played, and regardless of which direction the tape normally advances. is performed, and when the reverse fast forward key 54 is operated in the same manner, the tape is fast forwarded in the reverse direction.

With reference to FIG. 3, this new method will be explained for the case where a song that has been listened to is to be played again and the CPS key 50 is activated.

The initial situation is shown in FIG. 3a, where the pause 58 has just reached position P of the recording head.

When the reverse fast forward key 54 is operated, the playback operation is immediately switched to the muting operation and the recording head 34 is switched to the CP.
It is placed in the S position. At the same time, the normal feed speed running wheel (idler 24) is released from engagement and the fast feed wheel 40 is engaged.

The correction circuit 46 causes the fast forwarding wheel 40 to move in the third direction by reverse operation.
Fast forwarding is performed in the reverse direction as shown by arrow E in the figure.

When a pause 58 is detected before the desired song begins, reverse fast forwarding is again canceled by the reversing circuit. That is, it is switched back to the initial normal state. Due to the response time described above and due to fast forwarding in the reverse direction, the pause portion 58 travels past the recording head position before the tape stops running.

The recording tape 56 runs in the initial direction with the normal forward feed B, and the muting circuit no longer operates. Figure 3 e
As shown in FIG. 2, after the pause 58 the song can be played again after the muting circuit is fully deactivated.

This new method has the advantage of being able to locate the desired song without risking loss of information and, in turn, allowing the speed for fast forwarding the tape to be increased virtually arbitrarily to the extent technically possible. This has the advantage that the replacement time can be shortened to a considerable extent.

For example, in the case of FIG. 2, if the information rate and release rate are not large enough to effect the required switching during the pause 58, the recording tape 56 runs into the next song. The next "wrong" tape run direction corrects this error. It is only after the rest point 58 is reached again that a reversing pulse is generated which corrects the direction of travel again, or a reversing changeover takes place.

In the case of FIG. 3, the error caused by overshooting the pause is automatically corrected by the subsequent normal direction of advance of the recording tape 56.

According to the invention it is therefore possible to use a separate rapid traverse transmission for rapid traverse.

In this case, the desired CPS activation of this rapid traverse transmission is achieved by using the appropriately assigned rapid traverse key 52.
．． This is realized by 54.

Effects of the Invention The present invention has the advantage of being able to increase the speed of tape fast forwarding without risking loss of information.

[Brief explanation of the drawing]

FIG. 1 is a principle diagram of a cassette recorder having a reverse operation device and a CPS circuit; FIG. 2 is a step-by-step diagram illustrating how to search for a desired song after switching to forward fast forward; FIG. 3 is a diagram corresponding to FIG. 2, but showing a search for a desired piece of music when reverse fast forwarding is activated. 10...Chassis, 12.14...Reel stand, 16.・
・Motor・ 18 ゛Drive belt, 20...Roller for direction conversion, 22...Flywheel, 24...Fly, 26...Bearing lever, 28...To slider for reverse rotation, 30...Reverse rotation Switching wheel, 32... Rapid forwarding spring, 34...
...Recording head, 36...Recording head carrier, 40...
- Rapid feed wheel, 42... Rapid feed lever, 45... Muting circuit, 46... Correction circuit device, 48...
CP8 circuit, 50... CPS key, 52.54...
Fast forward key, 56...recording tape, 58...pause part.

Claims (1)

[Claims] 1. A method for automatically searching and automatically reproducing recordings separated from each other by pauses on an information carrier (recording tape), wherein the pauses form a search criterion and the search is performed. Forward fast forwarding (SV) is a method for automatically searching and automatically playing back recordings on an information carrier that are separated from each other by a pause. In this case, the fast-forward function is canceled by the reversing circuit or the reversing pulse, and the recording tape (56) moves at the normal running speed (D) to the rest part (5
The running direction of the recording tape (56) is changed to the normal running direction for playback operation after detecting the pause part (58). A method for automatic searching and automatic playback of recordings separated from each other by pauses on an information carrier, characterized in that the speed is maintained and the recordings are switched in the opposite direction by another reversing pulse. 2. The playback operation is switched to a muting operation during forward fast-forwarding (C), and the muting circuit stops working after detecting a pause, A method for automatically searching and automatically reproducing recordings on an information carrier that are separated from each other by pauses. 3. A method for automatically searching and automatically reproducing recordings on an information carrier (recording tape) that are separated from each other by pauses, the pauses forming a search criterion and fast forwarding the tape for the search; In a method for automatically searching and automatically playing recordings on an information carrier that are separated from each other by a pause, the fast-forward operation stops when a pause is detected.
SR) is performed by reverse operation, the reverse fast forward operation is canceled by the reverse circuit, and the recording tape (56) is run at the normal running speed (B) in the opposite direction to the previous reverse fast forward direction (E). A method for automatically searching and automatically reproducing recordings separated from each other by pauses on an information carrier, characterized in that the recording is performed while traveling. 4. The play operation is switched to a muting operation during reverse fast forward (SR), and the muting circuit is deactivated after canceling the reverse fast forward operation or after detecting the pause (58) again. A method for automatically searching and automatically reproducing recordings on an information carrier that are separated from each other by pauses, as claimed in claim 3. 5. On the information carrier according to claim 3, wherein the forward fast forward (SV) and the reverse fast forward (SR) function according to their respective running directions during reverse switching, A method for automatically searching and automatically playing recordings that are separated from each other by pauses. 6. Modification circuit (46) to allocate forward fast forward (SV) and reverse fast forward (SR) to operate correctly
A method for automatically searching and automatically reproducing recordings separated from each other by pauses on an information carrier as claimed in claim 5. 7. A device that automatically searches and automatically plays recordings separated by pauses, which has a forward fast-forward key and a reverse fast-forward key, and a CPS (cassette program search system) circuit for the CPS (cassette program search system) circuit. In the device with a key, the device has a separate fast-forward drive (32), (40), (42) and is provided with a reversing drive (30) in which the fast-forward movement is The keys (52), (54) (forward fast-forward key and reverse fast-forward key) are separated from each other by a resting part on the information carrier, characterized in that they are assigned to actuate in accordance with their functions. A device that automatically searches for and automatically plays recordings. 8. A modified reversal circuit (
46). The device according to claim 7, wherein: 9. Device according to claims 7 and/or 8, comprising a muting circuit (44) which can be activated by the fast forward key (52), (54) if the CPS key (50) is activated. .