JPH03290868A - Memory reproducing device - Google Patents

Abstract

PURPOSE:To enhance the operability by opening a 1st or a 2nd switch and commencing the read of a memory from a specified address stored in a storage part as a starting point to the end of the memory. CONSTITUTION:The closing time of switch (SW) is long, ad an optimum editing point is confirmed in reproducing the memory 1, and then when an SW 11 or an SW 12 is opened, the reproducing of the memory is commenced at an editing point stored in the storage part 5 at that time, i.e. not an editing point changing in the forward direction or the reverse direction by the SW 11 or the SW 12 at that time but an editing point at the time of starting the reproducing just prior to the aforesaid editing point, as the starting point until the memory end. Then, when the SW 11 or the SW 12 is again closed, changing of the editing point and reproducing of the memory are performed in a similar process. In this process, closing and opening of the SW 11 or SW 12 are repeated to retrieve the optimum editing point. By this method, the memory reproducing device for deciding the editing point with a sense of an operation that is similar to a cuing operation can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to electronic editing technology and relates to a memory playback device for reading out digital signals stored in a memory.

BACKGROUND OF THE INVENTION In recent years, in the field of magnetic recording and reproduction, recording methods have changed from analog recording to digital recording.

Along with this, the editing process between recorded tapes has changed from hand-cut editing by cutting the tapes with scissors and joining them together, to electronic editing by dubbing.When performing electronic editing, signals are dubbed onto the tape. 2 to edit before
The method used is to first store the signal near the editing point of a book tape in memory, then check the connection of the editing points in memory while playing back the signal in the memory, and then perform electronic editing. Various methods have been proposed for reproducing signals in memory.

Figure 4 shows the configuration of an example of a conventional memory playback device.
FIG. 5 shows the operation, and FIG. 6 shows the main part of a flowchart for explanation. In FIG. 4, 31 is a memory for storing and reproducing digital audio signals, and 32 is a memory 3.
Address counter (hereinafter referred to as
It is abbreviated as ADC.

), 33 is a read clock control circuit that controls reading and pausing of the memory, and 34 is a microcomputer (hereinafter abbreviated as microcomputer) that includes a storage section 35 for storing specific addresses on the memory, a central control section 38, and a ROM 39. ),
36 and 37 are switches (hereinafter abbreviated as SW) that move a specific address on the memory in the forward and reverse directions.

Regarding the memory playback device configured as described above, the fourth
The operation will be explained using FIGS. As mentioned above, in order to perform electronic editing, the information near the editing point is
A method is adopted in which the editing points are stored in the memory once and the editing points are checked in advance while playing back the memory. When the system is set to the memory regeneration state by a predetermined means, the storage unit 3
5 (hereinafter referred to as an edit point) is processed by the central control unit 38, preset to the ADC 32 via the microcomputer 34, and sets the read clock control circuit 33 to the read state, Forward memory playback starts from the edit point (step 31.3).
2). If the reproduced edit point is different from the expected edit point, close 5W36 or 5W37 (step 33.
34) Move the edit point forward or backward.

When 5W3B or 5W37 is closed, the microcomputer 34
The editing point stored in the storage section 35 changes in the forward or reverse direction (step 35), and the read clock control circuit 33 is set to a hibernation state via the microcomputer 34 (step 36), and the memory is regenerated. is canceled and the edit point is changed while muted. When the edit point is moved by the difference from the assumed edit point, 5W3B and 5W37 are released (step 37). When 5W38 and 5W37 are opened, a new editing point is stored in the storage section 35 (step 38), and memory reproduction is started again in the same procedure as described above.

The situation will be explained with reference to FIG. In Figure 5 (A
) is a schematic diagram of the memory, which is played forward from left to right, and al b + c in the diagram indicates a specific address (II collection point) on the memory. (B) is 5
It is a diagram showing the 0N10FF timing of W3ei and 1cF37, (C) is the 0N10F timing of 5W36 and 37.
It shows the change in the memory playback point and the change in the edit point corresponding to F, where the solid line shows the change in the memory playback point and the broken line shows the change in the edit point. Assume that the first editing point is now at point a. Check the edit point while playing back the memory, and if the expected edit point is a little further back, close 5W3e.
), move the edit point forward while muted. When the edit point is moved from point a to point b by the difference from the assumed edit point, 5W3B is released (t2), and the edit point is confirmed while reproducing the memory.

Memory playback starts from the new editing point. When the playback point reaches the memory end (t3), memory playback is stopped. Here, if the expected editing point is a little further forward, 5W37 is closed (t4). In that case, the editing point moves in the opposite direction starting from the new editing point A moved from the first editing point a. After moving the edit point by a desired amount, when 5W37 is released (t5), the edit point moves to point C, and memory playback starts again from point C. In this way, with 5W36.5W37, a method is adopted in which the optimal edit point is determined by repeating the procedure of changing the edit point back and forth in the muted state and replaying the memory from the new edit point each time. .

Problems to be Solved by the Invention However, with the above configuration, memory is played back starting from an edit point, and if the expected edit point and the current edit point are misaligned, the operator replaces the amount of misalignment with time information and makes an assumption. However, after muting the playback and changing the edit point by the expected amount of time, memory playback is repeated again using the new edit point as the starting point to determine the edit point, making the operation complicated and time consuming. The problem was that it took a lot of time.

The present invention solves the above-mentioned conventional problems, and allows editing points to be changed or determined while playing back signals on memory. The open reel is manually rotated clockwise and counterclockwise, and as the tape moves left and right, the fixed head cues the signal on the tape and plays it back, determining the editing point.) A memory reproducing device is provided.

Means for Solving the Problems The memory reproducing device of the present invention includes a memory for storing and reproducing digital signals, an address counter for controlling a read address of the memory, a read clock control circuit for controlling execution and suspension of reading from the memory. A storage section that stores a specific address on the memory, and a first section that moves the specific address in the forward and reverse directions. a second switch; and the first switch. Second
a first timer that manages the closing time of the switch, a second timer that manages the memory playback time, a third timer that manages the memory playback pause time, and the first or second switch. a specific address changing means which, when closed, starts a first timer and changes a specific address in a forward or reverse direction at a slower rate than the reading of the section memory during which the switch is closed; When the timer overflows, the first specific address storage means stores the specific address at that time in the storage section, presets the specific address stored in the storage section in the address counter, and puts the read clock control circuit into an execution state. a first memory read means that sets a second timer to start reading the memory; and when the second timer overflows, sets the read clock control circuit to a hibernation state and starts a third timer. a memory reading suspending means that suspends reading of the memory by doing so; and a second specific memory storing means that, when the third timer overflows, stores a specific address at that time in the storage section and retransfers to the first memory reading means. address storage means; third specific address storage means for storing a specific address at that time in a storage unit when the first or second switch is opened while the first timer has not overflowed; and second memory reading means that starts reading from the memory up to the end of the memory starting from a specific address stored in the storage section when the first or second switch is opened.

Operation The memory playback device of the present invention has the above-described configuration, so that when the first or second switch is closed, a specific address is changed in the forward or reverse direction in a muted state for a certain period of time, and after a certain period of time has elapsed, The second switch starts reading the memory in the forward direction starting from the specific address at that time while changing the specific address in the forward or reverse direction in response to the first or second switch, and manages the playback time. By alternately activating the timer No. 2 and the third timer that manages playback pauses, memory reading and pausing are repeated, and the switch closing time is short so that the 11th! : When the second switch is opened, the specific address at the time the switch is opened is stored as a new specific address, and the memory is read from that point to the end of the memory, so that the switch closes for a long time. If memory reading or pausing is being executed, by reading the memory from the specific address where memory reading was started before that to the end of the memory, the memory can be read from the memory while checking the specific address by memory playback. can be determined.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the memory playback device of the present invention. In FIG. 1, 1 is a memory for storing and reproducing digital audio signals, and 2 is an address counter (hereinafter referred to as ADC) that controls the read address of the memory 1.
It is abbreviated as ), 3 is a read clock control circuit that controls reading and pausing of the memory, 4 is a storage unit 5 that stores a specific address on the memory, and a closing timer (first timer) 6 that manages the closing time of the switch. , a playback timer (second timer) 7 that manages the playback time of the memory 1, a playback pause timer (third timer) 8 that manages the playback pause time, and a central control unit 9.
11.12 is a switch (hereinafter referred to as "edit point") for moving a specific address (hereinafter referred to as "edit point") in the memory in forward and reverse directions; , SW).

Regarding the memory playback device configured as described above, the first
The operation will be explained with reference to FIG. 2, which diagrammatically shows the memory reproducing operation, and FIG. 3, which shows the main part of the flowchart.

It is assumed that audio signals before and after the editing point are stored in the memory by a predetermined means in order to confirm the editing point in advance in the memory, and that memory playback is being executed starting from the editing point.

If the reproduced edit point is different from the expected edit point, 5w
Edit point is changed by 1t, 5W12.

When SWI 1 or 12 is closed (step 1), S
The closing timer 6 that manages the closing time of W is activated (step 2), and the editing point is 5WII.

5W12 (step 3), changes in the forward or reverse direction at a speed slower than the memory read speed (step 4) [Specific address changing means]. The closing timer is set to a time, for example, 100m5ec, which allows it to be determined whether the SW is pressed slightly or continuously.

When the closing timer 6 overflows (step 6), the edit point at that time is stored in the storage unit 5 as a new edit point (step 7) [first specific address storage means]
.

On the other hand, the editing point stored in the storage unit 5 is the central control unit θ
is processed, preset in the ADC 2 via the microcomputer 4 (step 10), sets the read clock control circuit 3 to the read state (step 11), and starts the playback timer 7 that manages the playback time of the memory in the microcomputer 4. Finally, in step 12), memory playback for a certain period of time in the forward direction starting from the editing point is started [first memory reading means]. The playback timer 7 is set to the shortest time in which the sound can be identified, for example several hundred
It is set to m5ec.

When the reproduction timer 7 overflows (step 13), it is processed by the central control unit 9, and the read clock control circuit 3 is set to a dormant state via the microcomputer 4 (step 15).
At the same time, the playback pause timer 8 for managing the playback pause time of the memory in the microcomputer 4 is started (step 16) to put it in a mute state for a certain period of time (memory read pause means). The playback pause timer 8 is set to the shortest time in which a break in sound can be discerned, for example, several tens of meters5ec.

When the playback pause timer 8 overflows (step 17
), the edit point information at that point is stored in the storage unit 5 as a new edit point (step 18), and the first memory reading means is executed in the same manner as described above [second specific address storage]. Means.

Short SW closing time, 5W without memory regeneration
If 11 or 12 is opened (step 8), S
The editing point at the time when W is released is stored in the storage unit 5 [
second specific address storage means].

At the same time, memory playback starts from the new editing point to the end of the memory (steps 20, 21 and 22) [Second
memory reading means].

On the other hand, if the closing time of the SW is long and the optimal editing point is confirmed while reproducing the memory, and 5WII or 5W12 is released (step 14.19), the information is stored in the storage unit 5 at that point. Edit point, i.e. SW at that point
I 1 or 5W12 starts memory playback to the end of the memory starting from the edit point where playback was started immediately before, rather than the edit point that is changing in the forward or reverse direction (
Steps 20, 21 and 22) C second memory reading means]
.

When 5WII or 12 is closed again (step 23), editing points are changed and memory reproduction is performed in the same manner.

Close 5WII or 5W12 using the above procedure.

Repeat opening to find the optimal editing point.

Referring to FIG. 2, an explanation will be given of the operation of changing an edit point in the forward direction while reproducing it from the memory, and then finely modifying the edit point by pressing the SW in the reverse direction without memory reproduction.

In FIG. 2, (A) is a schematic diagram of the memory, which is played back in the forward direction from left to right.
C+ d and e indicate specific addresses (edit points) on the memory, the same <f and g indicate the end point of memory playback during memory playback for a certain period of time, and b-Lc to g are memory playback sections, respectively. (B) is a diagram showing the 0N10FF timing of SWI 1 and 12, and CC) is a diagram showing the SWI 1 and 12 0N10FF timing.
It shows changes in the memory playback point and changes in the edit point corresponding to 0N10FF of Wl 1 and 12, where the solid line is the change in the memory playback point and the broken line is the change in the edit point.

The edit point finally found is point e on the memory in FIG. 2(A).

Assume that the first editing point is now at point a. The memory is reproduced starting from edit point a, and as a result of checking edit point a, if the expected edit point e is a little further back, 5W11 is closed (tl). When 5WII is closed, the time of T1,
That is, the time until the closing timer overflows, the time T2 from point b to point f after the edit point moves from point a to point b without memory regeneration, that is, the time until the replay timer overflows. After performing playback, pause for the time T3, that is, the time until the playback pause timer overflows, and then move from the new edit point C to g
The memory is replayed again up to the point, and the playback and pause are repeated for a fixed period of time. On the other hand, the editing point changes on a straight line connecting point a, point b, and point C at a speed slower than the memory playback speed, as shown in FIG. 2(C). After reproducing the memory from point C to point g, when the expected vicinity of editing point e is found, 5W11 is released (t2). When 5W11 is released, editing point C is confirmed while reproducing the memory up to the end of the memory, using the editing point C, at which the reproduction was started previously, as the reproduction starting point. Here, if the expected edit point e is a little further forward, press 5W12 for a time long enough to prevent the first timer from overflowing (t3). In that case, as shown in the figure, starting from a new edit point C moved from the first edit point a, the process moves to points C and d while 5W12 is closed. When 5W12 is released, memory playback starts again up to the end of the memory starting from the new edit point d. If the expected edit point is a little earlier, use 5W as well.
12 t 4) The final edit point e is searched by reproducing the memory from the new edit point e to the end of the memory.

Effects of the Invention As described above, the memory playback device of the present invention uses two types of switches to change the editing point in the forward direction and backward direction when playing back the digital audio signal stored in the memory, By continuing to press , the digital audio signal in the memory is played back in a spiral pattern, and while checking the sound, the editing point is roughly determined, and when the SW is released, the editing point is finely adjusted, and when the switch is released, the editing point is started from the new editing point. By performing memory playback up to the end of the memory, it is possible to confirm the edit point while listening to the sound, and it is possible to provide a memory playback device that determines the edit point with the same operational feeling as a cueing operation.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a memory playback device according to a first embodiment of the present invention, FIG. 2 is an operation waveform diagram explaining the memory playback operation of the same embodiment, and FIG. 3 is a summary of software processing of the same embodiment. 4 is a block diagram of a conventional memory reproducing device, FIG. 5 is an operation waveform diagram explaining the memory reproducing operation of the conventional example, and FIG. 6 is a main part of the software processing of the conventional example. FIG. 1...Memory, 2...Address counter,
3... Read clock control circuit, 4... Microcomputer, 5... Storage section, 6... Closing timer, 7... Reproduction timer, 8... Reproduction pause timer, 9... Central control unit, 10...R
OM1 11...first switch, 12...second switch.

Claims (1)

[Scope of Claims] A memory for storing and reproducing digital signals; an address counter for controlling a read address of the memory; a read clock control circuit for controlling execution and suspension of reading from the memory; a storage unit that stores addresses; first and second switches that move the specific address in forward and reverse directions; and a first timer that manages closing times of the first and second switches; , a second timer that manages the playback time of the memory; a third timer that manages the playback pause time of the memory; and when the first or second switch is closed, the first
specific address changing means for starting a timer and changing the specific address in a forward or reverse direction at a speed slower than the readout of the section memory during which the switch is closed; and when the first timer overflows; a first specific address storage means for storing the specific address at that time in the storage unit; and presetting the specific address stored in the storage unit in the address counter and executing the read clock control circuit. a first memory read means for setting the read clock control circuit to a sleep state and activating the second timer to start reading the memory; and setting the read clock control circuit to a rest state when the second timer overflows; memory reading suspending means for suspending reading from the memory by activating the third timer; and when the third timer overflows, storing the specific address at that time in the storage unit; a second specific address storage means for retransferring to the memory reading means; and when the first or second switch is opened while the first timer is not overflowing, the current specific address is stored. a third specific address storage means for storing in the storage section; and a third specific address storage means for storing the memory from the specific address stored in the storage section to the end of the memory when the first or second switch is opened. A memory reproducing device comprising: second memory reading means for starting reading.