JP2001060304A - Data reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data reproducing device capable of shortening a time for fast-forwarding and rewinding, and simply confirming recorded contents. SOLUTION: A reproducing button 19 initiates an reproducing action for reproducing 1st prescribed time data, and a fast-forwarding button 21 initiates the skip action for skipping over the 2nd prescribed time data. When the fast- forwarding button 21 is pressed during the reproducing action, intermittent reproduction which alternately performs the reproducing action and the skip action, and thereby fast-forwarding/fast-rewinding reproduction of the data is performed. And, a system control part 6 controls reproduction speed at the reproducing action so as to reproduce the data with the prescribed speed faster than the normal reproduction speed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data reproducing apparatus, and more particularly to a data reproducing apparatus capable of intermittently reproducing data in a short time at the time of fast forward or fast reverse.

[0002]

2. Description of the Related Art Hitherto, in a data reproducing apparatus using a magnetic tape, fast forward reproduction or rewind reproduction for reproducing at the time of fast forward or rewind of a tape has been performed.
By performing such fast forward reproduction or rewind reproduction, it is possible to determine the contents of the magnetic tape and obtain desired data.

Further, in a data reproducing apparatus using a digital tape, the recorded content can be confirmed by intermittently reproducing the audio signal in the tape when the tape is fast-forwarded or rewound. ing. Such a technique is described in, for example, JP-A-52-73712.

[0004]

In the above-described digital tape data reproducing apparatus, when fast-forwarding or rewinding is performed, the time required for fast-forwarding or rewinding can be reduced by shortening the portion to be intermittently reproduced. Be shorter. However, since the reproduction time is also shortened, it is difficult to confirm the recorded contents.

On the other hand, if a portion for intermittent reproduction is secured for a long time, the recorded contents can be easily confirmed. However, on the other hand, there is a problem that the time required for fast-forwarding or rewinding becomes long.

The present invention has been made in view of such a problem, and its object is to shorten the time required for fast-forwarding or rewinding and to easily confirm the recorded contents. An object of the present invention is to provide a data reproducing apparatus.

[0007]

The data reproducing apparatus according to the first invention alternately performs a reproducing operation for reproducing data for a first predetermined time and a skip operation for skipping data for a second predetermined time. In a data reproducing apparatus which performs fast forward / reverse reproduction of data by performing intermittent reproduction, control means for controlling the reproduction speed at the time of the reproduction operation to be reproduced at a predetermined speed higher than the normal reproduction speed is provided. It is characterized by having.

The data reproducing apparatus according to the second invention comprises a predetermined speed reproducing means for reproducing data in a forward direction at a predetermined speed higher than a normal reproducing speed for a first predetermined time,
A forward skip means for skipping data for a second predetermined time in a forward direction, an operation member for instructing fast-forward playback,
When fast-forward is instructed by the operation member, fast-forward playback means for fast-forward playback of data by alternately performing data playback by the predetermined speed playback means and skipping by the forward skip means, It is characterized by having.

Further, the data reproducing apparatus according to the third invention comprises a predetermined speed reproducing means for reproducing data in a forward direction at a predetermined speed higher than a normal reproducing speed for a first predetermined time,
A reverse skip means for skipping data for a second predetermined time in the reverse direction, an operation member for instructing fast reverse playback,
When fast-return is instructed by the operation member, fast-return playback means for fast-rewind playback of data by alternately performing data playback by the predetermined speed playback means and skipping by the reverse skip means. And characterized in that:

In the data reproducing apparatus according to the first invention, intermittent reproduction in which a reproduction operation for reproducing data for a first predetermined time and a skip operation for skipping data for a second predetermined time are alternately performed. By doing so, fast forward / fast reverse playback of data is performed. The control means controls the reproduction speed at the time of the reproduction operation so as to reproduce at a predetermined speed higher than the normal reproduction speed.

Further, in the data reproducing apparatus according to the second invention, the data is reproduced in the forward direction by the predetermined speed reproducing means at the predetermined speed higher than the normal reproduction speed for the first predetermined time. The data is skipped in the forward direction by the second predetermined time by the direction skip unit. Further, in the operation member for instructing fast-forward reproduction, when fast-forward is instructed, data reproduction by the predetermined speed reproducing means and skipping by the forward skip means are alternately performed, so that data is reproduced. Fast-forward playback is performed by fast-forward playback means.

Further, in the data reproducing apparatus according to the third invention, the data is reproduced in the forward direction by the predetermined speed reproducing means at the predetermined speed higher than the normal reproducing speed for the first predetermined time, and Data is skipped in the reverse direction by a second predetermined time by the direction skip unit. The fast reverse reproduction is instructed by the operation member. When fast-return is instructed by the operation member, the reproduction of data by the predetermined-speed reproducing means and the skipping by the reverse-direction skipping means are alternately performed by the fast-return reproducing means. Fast reverse playback of data is performed.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention and is a block diagram showing a configuration of a digital recorder to which a data reproducing apparatus is applied.

In FIG. 1, a microphone 1 has an amplifier (AM).
P) 2, a low-pass filter (LPF) 3, and an analog-to-digital (A / D) converter 4 to a digital signal processing unit (DSP) 5. This DSP
5 is connected to a system control unit (CPU) 6 and to a recording medium 7 built in the digital recorder, such as a flash memory.
It should be noted that the recording medium 7 may be removable from the digital recorder.

The DSP 5 has a digital-analog (D / A) converter 9 and a low-pass filter (L).
A speaker 12 is connected via a PF) 10 and an amplifier (AMP) 11. Further, the CPU 6 includes:
The display 14 is connected via the drive circuit 13 and the power control unit 15 is connected.

The CPU 6 is connected to operation switches having various operation buttons. These operation switches include, for example, a record button (RECSW) 18 and a play button (P
(LAYSW) 19, stop button (STOPSW) 20, fast forward button (F-SKIPSW) 21, fast reverse button (F-SKI)
PSER) and an erase button (ERASESW).

Next, a general recording / reproducing operation of the above-described digital recorder will be described.

When the operator presses the recording button 18, a recording mode is set. The sound input from the microphone 1 is converted into an electric signal, then amplified by the amplifier 2, and unnecessary components are removed by the LPF 3. Then, it is converted into a digital signal by the analog-digital converter 4 and
It is input to SP5. After the DSP 5 performs a compression process on the digital audio signal, the digital audio signal is recorded on the recording medium 7 as audio data under the control of the CPU 6.

When the reproduction button 19 is pressed by the operator, the reproduction mode is set. After the audio data is read out from the recording medium 7 under the control of the CPU 6, the decompression processing is performed in the DSP 5. The expanded audio signal is converted to an analog signal by a digital-analog converter 9 and then converted to an LPF 10
Then, the unnecessary components are removed, amplified by the amplifier 11, and then output from the speaker 12 as sound.

When the stop button 20 is pressed during the above-described sound recording operation or reproduction operation, the operation at that time is stopped. Furthermore, the fast forward button (F-SKIP
SW) 21 is pressed to skip data in the forward direction, and similarly, when the fast-return button (F-SKIPSW) 22 is pressed, data is skipped in the reverse direction. When the erase button (ERASESW) 23 is pressed, the written data is erased.

Various information is displayed on the display 14 via the drive circuit 13 according to the mode. Further, the power control unit 15 controls power supplied to each unit in the apparatus and controls power saving.

Next, referring to the flowchart of FIG.
The basic operation of the digital recorder according to the present embodiment will be described.

First, in step S1, various predetermined initial settings are performed. Next, in step S2, the state of the play button 19 is detected. Here, if the reproduction button has been turned on, the flow shifts to step S3 to execute the reproduction mode.

If the reproduction button 19 has not been turned on in step S2, the state of the recording button 18 is detected in the following step S4. If the recording button 18 has been turned on, the process proceeds to step S5, and the recording mode is executed.

If the recording button 18 has not been turned on in step S4, the process proceeds to step S6 and the fast forward button 2
1 is detected. If the fast-forward button 21 has been turned on, the process proceeds to step S7 to execute the fast-forward mode.

If the fast-forward button 21 has not been turned on in step S6, the process proceeds to step S8, where the state of the fast-return button 22 is detected. Here, if the fast-return button 22 is turned on, the process proceeds to step S9, and the fast-return mode is executed.

Further, in step S8, the quick return button 22
If is not turned on, the process proceeds to step S10, where the state of the erase button 23 is detected. Here, if the erase button 23 is turned on, the process proceeds to step S11, and the erase mode is executed.

Then, the above steps S3, S5, S7,
After the end of the processing of S9, S10 and S11, the above-described step S2
And the subsequent processing operations are repeated.

FIG. 3 is a flowchart for explaining the processing operation of the subroutine "reproduction mode" of step S3 in the above-mentioned flowchart of FIG.

When this reproducing mode is executed, first, a reproducing operation is started in step S21. Next, in step S22, it is determined whether or not the fast forward button 21 has been turned on in the playback state.

If the fast-forward button 21 has not been turned on, the flow shifts to step S26 to perform reproduction at the normal speed.

On the other hand, if the fast forward button 21 is turned on,
The process proceeds to step S23 to perform fast-forward playback. In this case, for example, it is assumed that reproduction is performed at 1.5 times the normal reproduction speed in step S26.

Next, in step S24, the processing of steps S23 and S24 is repeated until a first predetermined time, in this case, 0.6 seconds, has elapsed. If 0.6 seconds have elapsed in the fast-forward playback, step S25
To the second predetermined time, for example, for 1.2 seconds,
Playback data is skipped in the forward direction.

Next, in step S27, it is determined whether or not the data to be reproduced has been completed. Here, if the reproduction data is completed, the process shifts to step S29 to perform the processing of the reproduction end, and then exits this routine. On the other hand, if the reproduction data still exists, the process proceeds to step S28, and the state of the stop button 20 is detected.

If the stop button 20 has been turned on in step S28, the flow shifts to step S29 to perform the processing of terminating the reproduction. On the other hand, if the stop button 20 has not been turned on, the process proceeds to step S22, and the above-described step S2
The processing operations of 2 to S28 are repeated.

Here, the operation of the fast-forward reproduction described above will be described with reference to FIG.

Now, it is assumed that the fast-forward button 21 is turned on at t ₁ during the reproducing operation. Then, t ₁ ~
In period FL1 of t _2, 0.6 seconds, the normal reproduction is carried out (1.5 times reproduction) of 1.5 times faster than the playback speed. This means that if reproduction is performed at 1.5 times the normal speed for 1 second, reproduction is performed in 0.6 seconds.

Next, in a period S1 between t ₂ and t ₃ , 1.
Skipped forward for 2 seconds.

[0040] Then, for example, if you have not yet reproduced data is complete, followed by In the period FL2 of t ₃ ~t _4, 0.6 seconds, 1.5 times reproduction is done, t ₄ ~t ₅ Is skipped in the forward direction for 1.2 seconds in the period S2.

In this manner, during fast-forward playback, 1.5 seconds until playback data ends or the stop button 20 is turned on.
Double playback and forward data skip are repeated.

In the case of reproduction at a normal speed, t ₁
~t _2, t ₃ ~t ₄ is reproduced in one second.

Next, a modified example of this embodiment will be described.

In the above-described embodiment, only the fast-forward playback operation has been described. However, fast-forward playback can also be performed.

FIG. 5 is a flowchart for explaining a processing operation of a modification of the subroutine "reproduction mode" of step S3 in the flowchart of FIG. 2 described above.

When the reproduction mode is executed, first, a reproduction operation is started in step S31. Next, in step S32, it is determined whether or not the fast forward button 21 has been turned on in the playback state.

If the fast-forward button 21 has not been turned on, the flow advances to step S36 to determine whether or not the fast-return button 22 has been turned on at other times during reproduction.

When the fast-forward button 21 is turned on in step S32, the processing operations in steps S33 to S35 are as follows.
Step S23 in the flowchart of FIG. 3 described above.
Since this is the same as S25, the description is omitted here.

In step S36, the fast-return button 2
If No. 2 has not been turned on, the process proceeds to step S40, and reproduction at the normal speed is performed.

On the other hand, if it is determined in step S36 that the fast-return button 22 has been turned on, the flow advances to step S37 to skip the reproduction data in the reverse direction by a third predetermined time, for example, 3.2 seconds. Is done. Thereafter, the flow shifts to step S38 to perform fast reverse reproduction. In this case, for example, it is assumed that reproduction is performed at a speed 1.5 times the normal reproduction speed in step S40.

Next, in step S39, the processing in steps S38 and S39 is repeated until the first predetermined time, in this case, 0.6 seconds, has elapsed. And
If 0.6 seconds have elapsed after the fast reverse playback, step S
It moves to 41.

The processing operations in steps S41 to S43 are the same as those in steps S27 to S29 in the flowchart of FIG. 3 described above, and a description thereof will not be repeated.

Here, the operation of the above-mentioned fast reverse reproduction will be described with reference to FIG.

[0054] Now, even during playback operation in the period L11 of t ₁₅ ~t _16, it is assumed that the fast-rewind button 22 at the t ₁₆ is turned on. Then, in the period RS1 of t ₁₆ ~t _13,
Data is skipped in the reverse direction for 3.2 seconds. Then, after the above-mentioned skip end, in the period L12 of t ₁₃ ~t _14,
For 0.6 seconds, the reproduction is performed at a speed 1.5 times the normal reproduction speed (1.5 times reproduction).

[0055] Then, for example, if it is not already reproduced data is finished, subsequently at the time RS2 of t ₁₄ ~t _11, 3.2 seconds, the data in the reverse direction are skipped, t ₁₁
At time L13 of ~t _12, 0.6 seconds, 1.5 times reproduction is performed.

As described above, during the fast reverse playback, the playback is stopped until the end of the playback data or the stop button 20 is turned on.
Double playback and data skipping in the reverse direction are repeated.

During fast rewind playback, the third predetermined time needs to be set to be at least twice as long as the first predetermined time. This is because if the setting is not made in this way, a portion overlapping with the reproduction data appears during fast reverse reproduction.

In the above-described embodiment, fast-forward playback and fast-reverse playback have been described as being 15 times the normal playback speed. However, the present invention is not limited to this. For example, the speed may be 1.2 to 2 times the normal reproduction speed, and may be a speed at which the contents of the data can be confirmed. The higher the setting of the fast-forward playback speed and the fast-back playback speed, the higher the search speed, but the content may not be confirmed. Therefore, it is preferable to perform the playback at a speed of 1.3 to 1.5 times.

According to the above embodiment of the present invention, the following configuration can be obtained.

That is, (1) intermittent reproduction in which a reproduction operation for reproducing data for a first predetermined time and a skip operation for skipping data for a second predetermined time are alternately performed, thereby fast-forwarding / fast-forwarding data. A data reproducing apparatus for performing reverse reproduction, further comprising control means for controlling a reproduction speed at the time of the reproduction operation to be reproduced at a predetermined speed higher than a normal reproduction speed.

(2) The data reproducing apparatus according to (1), wherein the predetermined speed is a speed at which data contents in a range of 1.2 to 2 times the normal reproducing speed can be understood. .

(3) The data according to (1), wherein the predetermined speed is a speed at which data content in a range of 1.3 to 1.5 times the normal reproduction speed can be understood. Playback device.

(4) A predetermined speed reproducing means for reproducing data in a forward direction at a predetermined speed higher than a normal reproducing speed for a first predetermined time, and an order for skipping data for a second predetermined time in a forward direction. Direction skip means, reverse direction skip means for skipping data for a third predetermined time in the reverse direction, an operation member for instructing fast-forward / fast-reverse reproduction, and when fast-forward is instructed by the operation member, Fast forward reproduction of data is performed by alternately performing the reproduction of the data by the predetermined speed reproducing means and the skipping by the forward skipping means, and when the fast return is instructed by the operation member, the predetermined speed reproduction is performed. Fast forward / fast reverse playback means for performing fast reverse playback of data by alternately performing data playback by the means and skipping by the above-described reverse skipping 1000 steps. And a data reproducing apparatus.

(5) The data reproducing apparatus according to (4), wherein the third predetermined time is at least twice as long as the first predetermined time.

(6) The fast-forward / fast-reverse playback means
The above (4), wherein the fast forward reproduction or the fast reverse reproduction is performed only while the operation member is being operated.
A data reproducing apparatus according to claim 1.

[0066]

As described above, according to the present invention, it is possible to provide a data reproducing apparatus capable of shortening the time required for fast-forwarding or rewinding and confirming recorded contents in a simple manner.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, and is a block diagram illustrating a configuration of a digital recorder to which a data reproducing device is applied.

FIG. 2 is a flowchart illustrating a basic operation of the digital recorder according to one embodiment of the present invention.

FIG. 3 is a flowchart illustrating a processing operation of a subroutine “reproduction mode” of step S3 in the flowchart of FIG. 2;

FIG. 4 is a diagram illustrating an operation of fast-forward playback.

FIG. 5 is a flowchart illustrating a processing operation of a modified example of the subroutine “reproduction mode” of step S3 in the flowchart of FIG. 2;

FIG. 6 is a diagram illustrating an operation of fast reverse playback.

[Explanation of symbols]

 1 microphone, 2, 11 amplifier (AMP), 3, 10 low-pass filter (LPF), 4 analog-digital (A / D) converter, 5 digital signal processing unit (DSP), 6 system control unit (CPU), 7 recording Medium, 9 digital-analog (D / A) converter, 12 speakers, 13 drive circuit, 14 display, 15 power supply control unit, 18 record button (RECSW), 19 play button (PLAYSW), 20 stop button (STOPSW), 21 Fast forward button (F-SKIPSW), 22 Fast return button (F-SKIPSW), 23 Erase button (ERASESW).

Claims (3)

[Claims] An intermittent reproduction in which a reproduction operation for reproducing data for a first predetermined time and a skip operation for skipping data for a second predetermined time are alternately performed, whereby fast forward / reverse reproduction of data is performed. A data reproducing apparatus, comprising: a control unit for controlling a reproducing speed at the time of the reproducing operation to be reproduced at a predetermined speed higher than a normal reproducing speed. 2. A predetermined speed reproducing means for reproducing data in a forward direction at a predetermined speed higher than a normal reproducing speed for a first predetermined time, and a forward direction for skipping data for a second predetermined time in a forward direction. A skip unit, an operation member for instructing fast-forward reproduction, and, when fast-forward is instructed on the operation member, data reproduction by the predetermined speed reproduction unit and skipping by the forward skip unit are alternately performed. And a fast-forward playback means for fast-forward playback of data by: 3. A predetermined speed reproducing means for reproducing data in a forward direction at a predetermined speed higher than a normal reproducing speed for a first predetermined time, and in a reverse direction for skipping data for a second predetermined time in a reverse direction. A skip means, an operation member for instructing fast-reverse reproduction, and, when fast-rewind is instructed on the operation member, data reproduction by the predetermined speed reproduction means and skipping by the reverse skip means are alternately performed. And a fast-reverse reproducing means for performing fast-reverse reproduction of data by performing the data reproduction.