JPS5880145A - Tape recorder - Google Patents

Abstract

PURPOSE:To enable the reproduction from the head part of a recorded part of a tape in a quick and assured time, by providing the means to detect the head of music and the interval of music as well as a program-searching function which wind the tape to search the program and then reproduces the tape after once rewinding the tape. CONSTITUTION:Not only a music interval detecting circuit 4 but a music head detecting circuit 8 are connected to an equalizer amplifier 3. The circuit 8 is also connected to a working mode control circuit 5. The circuit 8 discriminates the output of the amplifier 3 in terms of the threshold level and therefore detects the head part of the recorded part when a tape on a reproducing head 2 reaches the recorded part from the silent part. Then the circuit 8 delivers the music head detecting signal.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape recorder, and in particular, to a tape recorded with a plurality of recording sections with unrecorded sections interposed between adjacent recording sections, a cueing function of the recording section is provided. Concerning tape recorders equipped with

FIG. 1 is a block diagram showing a conventional tape recorder equipped with a cue function. Playback head 2 in contact with tape 1
are arranged, the playback head 2 includes an equalizer amplifier 3, the equalizer amplifier 3 includes a song interval detection circuit 4, the song interval detection circuit 4 includes an operation mode control circuit 5, and the operation mode control circuit 5 includes an operation mode control circuit 5. A keyboard 6 and a tape running motor 7 are connected. A plurality of recording sections are recorded on the tape 1 with unrecorded sections interposed between adjacent recording sections.

The playback head 2 extracts the signal of the recording section of the tape 1.

The equalizer amplifier 3 corrects and amplifies the output of the reproducing head 2. The song interval detection circuit 4 performs a threshold value discrimination on the output of the equalizer amplifier 3 to detect a non-recorded portion when the tape on the playback head 2 moves from a recorded portion to a non-recorded portion, and detects a song gap. Output a signal. , operation mode control circuit 5
controls the operation mode of the tape recorder in response to the song interval detection signal, a signal from the keyboard 6, or the like.

The keyboard 6 houses various operation keys.
Outputs operation signals. The tape running motor 7 performs a tape running operation in response to the output of the operation mode control circuit 5.

Next, the operation of the conventional example shown in FIG. 1 will be explained. The operation modes of this conventional example include a winding cue mode, a rewind cue mode, and a reproduction mode.

In the winding cue mode, the tape is wound at high speed to find the cue, and no playback is performed during this time. In the rewind cue mode, the tape is rewound at high speed to find the cue, and no playback is performed during this time. The play mode is for playing the tape at a specified speed.

FIG. 2 is a diagram for explaining the winding start operation of the conventional example. Now, when the winding start mode is selected on the keyboard 6, the operation mode becomes the winding start mode, and the tape 1 is wound at high speed in the direction of the arrow. Assuming that the first recording section of the plurality of recording sections of the tape 1 is running on the playback head 2, the unrecorded section between the first recording section and the second recording section following it is being played back. head 2
When the upper 8th mark is reached, the song interval detection circuit 4 outputs a song interval detection signal. The operation mode control circuit 5 receiving the signal,
The operation mode is switched to the playback mode, but due to the unavoidable time lag of various mechanisms that control the running of the tape (hereinafter referred to as tape drive control mechanisms), it is the playback head that actually starts the playback operation. 2 is from the point where it enters the unrecorded area by a distance of 10. By the way, if the length of the unrecorded part is L, the size of L is often not constant, and if the length of the unrecorded part is short (CL<1□), the second recorded part will be played from the middle. , when the length of the unrecorded portion is longer than necessary (CL>>l□), there is a drawback that it takes a long time until the second recorded portion is played back.

FIG. 3 is a diagram for explaining a conventional rewind cue operation. Contrary to the case in FIG. 2, when the rewind cue mode is selected on the keyboard 6, the operation mode becomes the rewind cue mode, and the tape 1 is rewound at high speed in the direction of the arrow. .

In this case as well, as in the case of FIG.
This is from where only 0 is entered. Therefore, even if the length of the unrecorded part is longer than necessary (L>>l), it will not take a long time until the second recorded part is played; If the length is short (CL<11), there is a drawback that the playback is performed from the end of the first recording section.

The main object of the present invention is to advantageously eliminate the above-mentioned conventional drawbacks in the beginning of winding, and to reliably and quickly move the beginning of the recording section from the beginning of the recording section, regardless of the length of the unrecorded section. To provide a tape recorder having a cue function for playback.

In summary, the present invention includes a track start detection means and a track interval detection circuit stage, and has a cue function of winding the tape, finding the beginning, then rewinding the tape, and playing back that machine number. It's a tape recorder.

Embodiments of the present invention will be described below based on the drawings.

FIG. 4 is a block diagram showing an embodiment of the present invention. Only the differences from the conventional example shown in FIG. 1 will be explained. That is, in addition to the song interval detection circuit 4, a song start detection circuit 8 is connected to the equalizer amplifier 3, and the song start detection circuit 8 is connected to the operation mode control circuit 5. The song start detection circuit 8 detects the beginning of the recording section when the tape on the playback head 2 moves from the unrecorded section to the recording section by thresholding the output of the equalizer amplifier 3 and detects the beginning of the song. Outputs head detection signal. The operation mode control circuit 5 is realized, for example, by a microcomputer, and performs control operations as shown in FIG. 6-ζ.

FIG. 5 is a diagram for explaining the winding start operation of the embodiment of the present invention. FIG. 6 is a flowchart for explaining the operation of the operation mode control circuit 5 according to the embodiment of the present invention.

The operation of the embodiment of the present invention will be described below with reference to FIGS. 5 and 6. The main difference from the operation of the conventional example described above is that in addition to the operation mode of the conventional example, The reason is that a rewind mode is used.

Rewind mode rewinds the tape at a low speed,
No playback occurs during this time.

Now, when the winding cue mode is selected on the keyboard 6, it is determined in step s1 whether or not to cue in the winding direction, and since in this case it is the winding direction, the process proceeds to step S2, and the operation mode is set. The winding start mode is entered, and the tape 1 is wound at high speed in the direction of the arrow in FIG. For example, if the first recording section or the non-recording section of the plurality of recording sections of the tape 1 is traveling over the playback head 2, when the second recording section comes over the playback head 2, the song will be played. The head detection circuit 8 outputs a curve head detection signal (see FIG. 5 (1)). In step S3, it is determined that the beginning of a song has been detected based on this song beginning detection signal, and the process proceeds to step S4, where the operation mode becomes rewind mode. In this case, - due to the unavoidable time delay of the tape running control mechanism, it is conventional practice that the rewind operation is actually started after the playback head 2 has entered the second recording section by a distance of 11. The same is true for . In step S4, the tape is rewound, and when the unrecorded part comes above the playback head 2, the song interval detection circuit 4
outputs a song interval detection signal (see FIG. 4(b)). In step S5, inter-music detection is determined based on this inter-music detection circuit number, and the process advances to step S6, where the operation mode becomes reproduction mode. In this case, due to an unavoidable time delay in the tape running control mechanism, the playback head 2 is within the unrecorded area before it actually starts playback. It is the same as in the conventional example that it starts from the point where only 2 is entered. However, since the purpose of this rewind mode is to rewind the tape by the distance l□, the rewind is performed at a low speed, and therefore j2 is very small. Therefore, in step S6, the data is reliably reproduced from the beginning of the second recording section in a short time, regardless of the length Ll of the unrecorded section.

Next, when the rewind cue mode is selected on the keyboard 6, contrary to the case shown in FIG. 5, the operation is the same as in the conventional example (see FIG. 3). That is, in step S1, it is determined whether or not to start in the winding direction, and since the present case is in the rewinding direction, the process proceeds to step S7, where the operation mode becomes the rewinding and starting mode, and the tape 1 is rewound at high speed. During this period, the song interval detection circuit 4 outputs the song interval detection signal. In step S8, it is determined that a song interval is detected based on the song interval detection signal, and the process proceeds to step S6.
The operation mode becomes playback mode.

As described above, according to the present invention, during winding, the recording is reliably reproduced from the beginning of the recording section in a short time, regardless of the length L of the non-recording section. Also, as a result, the length L of the unrecorded part can be made sufficiently larger than the above-mentioned j1, and by doing so, when rewinding and cuing the beginning of the recording part as explained in FIG. This has the effect of eliminating the drawback of being played from the last part.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing a tape recorder equipped with a conventional cueing function, and Fig. 2 is a conventional winding cueing operation.
FIG. 3 is a diagram for explaining the rewinding and cueing operation of the conventional example. FIG. 4 is a block diagram showing an embodiment of the present invention. FIG. 5 is an embodiment of the present invention. FIG. 6 is a flow chart for explaining the operation of the operation mode control circuit according to the embodiment of the present invention. In the figure, 1 is a tape, 2 is a playback head, 3 is an equalizer amplifier, 4 is an inter-track detection circuit, 5 is an operation mode control circuit, 6 is a keyboard, 7 is a tape running motor, and 8 is a track start detection circuit. . Agent: Shin Kuzuno - (1 other person) 1st Enbu 2nd figure V3 figure Q&A Chi signal No. 4 (2) Figure 5 M turret signal

Claims (2)

[Claims] (1) A tape recorder having a function of locating the beginning of a plurality of recording sections on a tape recorded with a non-recording section interposed between adjacent recording sections, the beginning part of the recording section. track start detection means for detecting the unrecorded portion; track interval detection means for detecting the unrecorded portion; and after rewinding the tape in response to the output of the track start detection means, the tape is rewound in response to the output of the song interval detection means. a tape recorder comprising an operation mode control means for controlling an operation mode so as to play back a tape. (2) The operation mode control means controls to wind the tape and locate the beginning of the tape, and rewinds the tape in response to an output of the beginning detection means that occurs while winding the tape and finding the beginning of the tape. and means for controlling the tape to be played back in response to the output of the inter-track detection means generated during rewinding the tape. tape recorder.