JPH03248398A - Recording and reproducing system for digital recording and reproducing machine - Google Patents

Abstract

PURPOSE:To extend or compress the length of a silence part by performing recording by recording sound interval on sound data area, recording a position on the sound data area where a silence interval begins and the length of the silence interval on a silence information area, and recording the sound. CONSTITUTION:The recording on the sound data area 3A is performed by omitting the silence interval while recording the start position (address) and the length of the silence interval on the silence information area 3B, and afterwards, reproduction or cycle reproduction including the silence interval is performed based on silence information recorded separately. In other words, the reproduction is performed by varying the length of the silence interval at need as performing the reproduction of the sound interval recorded on the sound data area 3A and the silence interval recorded on the silence information area 3B according to recording sequence when the reproduction is performed. In such a way, it is possible to extend or compress the length of the silence part.

Description

[Detailed description of the invention]

[0001]

[Industrial application field]

The present invention relates to a recording and reproducing method for a digital recording and reproducing machine that uses a digital storage device such as a RAM as a storage means. [0002]

[Conventional technology]

With conventional recording and playback machines that use magnetic tape, when playing back recorded information, you can rewind the magnetic tape, cue a desired point, and play it back exactly as it was recorded, or change the overall playback speed to speed up the playback. I was listening to it. [0003]

[Problem to be solved by the invention]

However, while conventional devices using the above-mentioned recording and playback method are convenient for applications such as playing back recordings of meetings etc. in a short time and checking the recorded content, they are not suitable for applications such as language learning. There was a problem in that when playing only a specific part repeatedly or practicing pronunciation in a silent part, it was not possible to stretch the length of the silent part and play it back according to one's ability. . [0004] The present invention has been made to solve the above-mentioned problems, and provides a recording device for a digital recording/playback device that can lengthen or shorten the length of only the silent portion of the recorded information during playback. The purpose is to provide a reproduction method. [0005]

[Means to solve the problem]

In order to achieve the above object, the present invention provides a recording and reproducing method for a digital recording and reproducing machine, which comprises: distinguishing between a silent section and a sound section of an input audio signal;
The sound section excluding the silent section is recorded in the sound data area, and the position on the sound data area where the silent section should start and the length of the silent section are recorded in the silent information area to record the sound. The method is characterized in that the length of the silent section is changed when the sound section recorded in the sound data area and the silent section recorded in the silent information area are played back in that order. A recording and playback method for digital recording and playback equipment. [0006]

[Effect]

In the recording/playback method according to the present invention, an input audio signal is divided into a silent section and a sound section, and the sound section excluding the silent section is recorded in the sound data area. On the other hand, the position on the sound data area where the silent section should start and the length of the silent section are recorded in the silent information area, and the audio is recorded. [0007] During playback, the length of the silent section may be shortened or extended when the sound section recorded in the sound data area and the silent section recorded in the silent information area are played back in that order. and then change and play. [0008]

【Example】

Hereinafter, the present invention will be described in detail with reference to the drawings. [0009] FIG. 3 is an example in which a digital recording/playback device using the recording/playback method according to the present invention is connected to a tape recorder for language study. [0010] The tape recorder 1 is usually equipped with general operation functions, and performs a playback operation by pressing the playback switch IA. A digital recording/playback device 2 (using a RAM as a storage means) connected thereto constantly records data while erasing old data while the tape recorder 1 is playing. Then, when the user presses the stop switch IB of the tape recorder 1 at the point where the user wants to listen back, the digital recording/reproducing device 2 simultaneously reproduces or repeatedly reproduces data from an arbitrary point in the RAM to the recording stop point. When listening many times, it is less burdensome than repeating with the mechanical tape recorder 1, and arbitrary sections can be repeated automatically. [0011] Various methods can be considered to determine the location in the RAM at which the digital recording/playback device 2 starts playback. [0012] FIG. 4 is a diagram showing a method of dividing a RAM area. Here, without fixing the boundaries of the data area, as shown in the figure,
Determine area boundaries based on silence information during recording. In other words, while recording the start position (address) and length of a silent section in a separate specific storage area (hereinafter referred to as "silent information area") 3B, the main storage area (hereinafter referred to as "sound data area") 3A Recording is performed with the silent section omitted, and later, based on this separately recorded silence information, reproduction or repeated reproduction including the silent section is performed. [0013] FIGS. 5 to 12 are diagrams for explaining the operation of specifying an area where reproduction is to be started in the division method of FIG. 4. [0014] In FIG. 5, an area for starting playback is specified using switches (limited number) SWI to SW5 provided corresponding to each area. The figure shows a case where the switch SW3 is pressed to play back from the area three places before the recording end point (area 3). [0015] In FIG. 6, an area is specified by the number of times one switch SW is pressed. When you press one note, you move one place before the recording end point, when you press two notes, you move two places before, when you press three notes, you move three places before the recording end point, etc. In the same way, the area before the number of notes you press is the area where playback starts. Specify as . [0016] In FIG. 7, different time lengths, such as 1 second, 2 seconds, 3 seconds, 5 seconds, etc., are assigned to the plurality of switches SW1 to SW4, . . . . When one of these switches is pressed, the sound is played back from the beginning of the sound area that includes the time point corresponding to that switch from the recording end point. For example, when the switch SW4 for 5 seconds is pressed, in the case shown in the figure, the data will be played back from the beginning of area 2, which includes the time point 5 seconds from the recording end point. [0017] Figures 8 and 9 use separately recorded silence information, and Figure 8 starts playback from the area following the oldest silent section, and Figure 9 starts playback from the area following the longest silent section. It was designed to do so. FIG. 9 shows a case where the longest silent period is between area 2 and area 3. [0018] Furthermore, by calculating silence information that includes the starting position (address) and length of a silent interval as data, it is possible to search for the longest voiced interval. FIG. 10 takes advantage of this, and calculates from the silence information to start playback from the longest sound area. [0019] In FIG. 11, a threshold is set for the length of the silent section, silence information in the silent information area 3B is searched backwards from the recording end point, and the length of the silent section is longer (or shorter) than the threshold. Playback starts from the next active area. [0020]Furthermore, in the case as shown in FIG. 5 or 7, it is possible to lock a specific switch and omit the same operation every time recording is completed. The example shown in FIG. 12 is a case where the switch SW3 in FIG. 5 is locked by the lock switch SWL, and the area 3 is played back many times from the second time onwards until the lock switch SWL is released. [0021] In the above, FIGS. 5 to 13 have been described assuming that playback is performed from a designated area to the recording end point, but in any case, only one designated area can be played back, or it can be repeated with a short pause section. It can also be played. The example shown in Fig. 13 uses a switch like that shown in Fig. 5 to
This is a case where the specified area 3 is repeatedly played back until a stop switch (not shown) is pressed. The same applies to other cases, and it is possible to reproduce or repeatedly reproduce only the sound section designated as the reproduction start area. [0022] Also, in order to visually obtain silence information, a liquid crystal display or the like is used to shift and update the sound/silence display or power display for all RAM areas during recording by shifting them as shown in FIG. It is convenient to display this while referring to it when playing. FIG. 14 shows an example in which power is displayed using the liquid crystal display 4, and the power is displayed while being shifted to the left according to the scale 5 (displaying seconds) and being updated sequentially. [0023] By the way, when reproducing a plurality of areas continuously as shown in FIGS. 5 to 12, it is common to reproduce with real-time pauses during recording based on silence information. However, in some cases, it is very effective to extend a silent section to a specified length and play it back, or to shorten a silent section longer than a certain length to a fixed length and play it back [0024] Figure 2 shows the original waveform and sound data area (RAM) 3
A and a reproduced waveform are shown in comparison. If the silent section is extended to a specified length and played back as shown in Figure 1, dictation, etc. can be done easily. Furthermore, if the silent section of a certain length or more is shortened to a certain length and played back as shown in FIG. 2, there is an advantage that wasted time can be saved. In this way, it is also possible to perform desired modification processing on silence information. [0025] Furthermore, the digital recording/playback device according to the present invention can be used in various other ways. For example, it can be used as a voice memo for telephones, televisions, radios, etc. [0026] FIG. 15 shows an example in which the digital recording/playback device 2 according to the present invention is connected to the audio output terminal of a telephone 6 or a television 7 as a voice memo. In such cases, silent information is also used to
Method 3 of dividing the area allows effective use of the storage area and is convenient for playback processing. [0027] As for memo processing, like in the case of advance notice, recording is performed all the time, and during recording, a switch on the digital recording/playback device is pressed to mark a point where the player wants to use it as a starting point for later playback. Recording is stopped by pressing the same switch again.
If you press the playback switch later, the section from the 11th time to the second time you pressed the switch will be played back. If the first switch (marking) is pressed during a sound section, playback is performed from the beginning of the sound section immediately after or immediately before. FIG. 16 shows a case where the first switch (marking) SW is pressed during a sound section, and reproduction is performed tracing back to the beginning of the sound section. [0028] If the display 4 as explained in FIG. 12 is also used here, even if you forget to press the switch (marking) SW, it is useful to be able to refer to the display 4 and play from any area afterwards. . [0029] When applied to a telephone, a specific storage area, e.g.
If a silent information and telephone number area 3C are separately provided as in 7, and the telephone number of the other party or one's own is automatically recorded at the beginning of recording, it is more convenient to search for memos etc. easily. [00301] Also, if you do the following during playback, you can easily listen to the same part over and over again or cue an area. In FIG. 18, if a specific switch SW is pressed during playback, the playback is restarted from the beginning of the area at the time of the push. In FIG. 19, each time the switch SW is pressed during playback, the playback starts from the beginning of the previous sound section. Although these are particularly effective as voice memos, they may of course be used for other purposes such as language learning. [0031]

【Effect of the invention】

As described above, in the recording and playback method according to the present invention, an input audio signal is divided into a silent section and a sound section, and the sound section excluding the silent section is recorded in the sound data area. The position on the sound data area where the section should start and the length of the silent section are recorded in the silent information area, and the audio is recorded.When playing back, the sound section recorded in the sound data area and the length of the silent section are recorded in the silent information area. The length of the silent section is changed when playing back the silent sections according to the order, so the length of only the silent section of the recorded information can be lengthened or shortened during playback. It is possible to provide a recording/playback method for a recording/playback device.

[Brief explanation of drawings]

[Figure 1] FIG. 3 is an explanatory diagram illustrating time compression of a silent section during playback.

[Figure 2] FIG. 6 is an explanatory diagram illustrating time extension of a silent section during playback.

FIG. 3 is a connection diagram with a tape recorder showing an embodiment of the present invention.

[Figure 4] FIG. 3 is an explanatory diagram illustrating a method of dividing a RAM area.

[Figure 5] FIG. 3 is an explanatory diagram illustrating a method for starting playback.

[Figure 6] FIG. 3 is an explanatory diagram illustrating a method for starting playback.

[Figure 7] FIG. 3 is an explanatory diagram illustrating a method for starting playback.

[Figure 8] FIG. 3 is an explanatory diagram illustrating a method for starting playback.

[Figure 9] FIG. 3 is an explanatory diagram illustrating a method for starting playback.

[Figure 10] FIG. 3 is an explanatory diagram illustrating a method for starting playback.

[Figure 11] FIG. 3 is an explanatory diagram illustrating a method for starting playback.

[Figure 12] FIG. 3 is an explanatory diagram illustrating a method for starting playback.

[Figure 13] FIG. 3 is an explanatory diagram illustrating repeated reproduction of a specific area.

[Figure 14] It is a figure which shows the power display by a liquid crystal display.

FIG. 15 is a connection diagram with a telephone or television when used as a voice memo.

FIG. 16 is an explanatory diagram illustrating control of a playback start point by adding markings during recording.

FIG. 17 is an explanatory diagram illustrating an example of a memory configuration when connected to a telephone.

[Figure 18] FIG. 3 is an explanatory diagram illustrating repeated playback or cueing.

[Figure 19] FIG. 3 is an explanatory diagram illustrating repeated playback or cueing.

[Explanation of symbols]

1 Tape recorder 2 Digital recording/playback machine RAM 3A Sound data area 3B Silence information area

[Figure 3]

[Figure 4] B A

[Figure 5] 3A

[Figure 6]

[Figure 7]

[Figure 8] 3A

[Figure 9] A

[Figure 101 A [Figure 11] A

[Figure 12]

[Figure 13]

[Figure 14]

[Figure 15]

[Figure 16]

[Figure 17] A

[Figure 18] 3A A

Claims (1)

[Claims] [Claim 1] A recording/playback method for a digital recording/playback device for recording and playing back audio by dividing it into a sound section and a silent section, the method comprising: dividing the sound into a sound section and a silent section; distinguish,
The sound section excluding the silent section is recorded in the sound data area, and the position on the sound data area where the silent section should start and the length of the silent section are recorded in the silent information area to record the sound. The method is characterized in that the length of the silent section is changed when the sound section recorded in the sound data area and the silent section recorded in the silent information area are played back in that order. Recording and playback method for digital recorder and playback equipment.