JPH0697522B2 - Tape recorder - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape recorder having a cueing function.

2. Description of the Related Art In recent years, various music cueing functions have been proposed in cassette type tape recorders. In particular, the direct music selection function that specifies an absolute address from the beginning of the tape to perform cueing is used for karaoke using a cassette tape. It is installed in many karaoke players because it is convenient when performing. The direct song selection function requires accurate cueing of the absolute address designated by the user, and therefore requires higher accuracy than other cueing functions. On the other hand, the means for realizing the cue function is to determine whether or not there is a space between songs, and detects a no-signal part using a dedicated IC or comparator IC, and discharges the capacitor or uses a counter such as a microcomputer. The duration of the no-signal state is counted, and the judgment is made based on whether or not the count has been counted for a certain time or longer. Also, when the mode is switched to the high-speed cue mode, the tape running may become unstable, and a no-signal part may be detected in a part other than between tracks. A prohibition time is provided so as not to count the time of the state.

The problem to be solved by the invention is that, depending on the system, there is a system in which the tape runs at a high speed cueing state when the tape running is not stable. When performing high-speed cueing from the position near the end to the direction of progress during playback, the track gap is ignored, and in the case of the direct song selection function, a malfunction may occur in which the displayed address does not match the current address. There was a problem that there is.

Means for Solving Problems The tape recorder of the present invention comprises a first storage means for storing for a predetermined time that the system is in an unstable tape running state when the mode is switched to the high speed cueing state, and the first storage means. Second storage means for storing that a non-signal portion of a certain time τ ₁ or more is detected when the tape traveling unstable state is stored by the storage means, 1 counting means, 2nd counting means for starting counting of the number of rotations of the tape take-up reel stand together with storage input to the 2nd storing means, and system until the 1st counting means finishes counting. Continue the high speed cueing state of
After the counting is completed, the tape running direction for high-speed cueing of the system is reversed, and by the second counting means, the second counting means returns approximately the same number as the count value counted by the second counting means until the first counting means finishes. Control means for controlling so as to continue the high-speed cueing direction in the reversed direction until counting, and a constant time τ ₂ (τ ₂ >) in a series of control operations by this control means.
τ ₁ ) When detecting a no-signal portion above, it is determined that the no-signal portion is between songs, the stored contents of the second storage means are cleared, and a series of operations by the control means is canceled. When the control means is instructed and no signalless portion of τ ₂ or more is detected in the series of operations by the control means, after the series of operations by the control means is finished, the traveling direction is reversed again and the initial high speed cueing state is obtained. It is provided with inter-track determination means for instructing the control means so that the traveling direction becomes.

Operation According to the present invention, the unstable time of tape running at the time of mode switching is stored in the first storage means according to the above-mentioned configuration, and the constant time τ is maintained in the tape running unstable state at the time of mode switching.
_{When one} or more non-signal portions are detected, they are stored in the second storage means, and the first and second counting means and the control means detect the non-signal portions of τ ₁ or more in an unstable tape running state. After continuing to run for a certain period of time, the tape running becomes unstable by performing a series of operations such as reversing the running direction and performing high-speed cueing to the tape position where a no-signal part was detected in the tape running unstable state. by reversing the direction of travel for the no-signal portion detected can be confirmed again by the tape running stability conditions, tau ₁ by addition between songs determining means
In contrast, when a non-signal portion for a time τ ₂ or more where τ ₂ > τ ₁ is detected, the non-signal portion is judged to be between tracks and the non-signal portion detected in the tape running unstable state is ignored. This makes it possible to accurately determine a track interval in consideration of an unstable tape running state at the time of mode switching, without providing a time for prohibiting the counting of the time of the partial state.

Embodiment A tape recorder according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram in one embodiment of the present invention, in which 1 is a signal detecting means for discriminating the presence or absence of a signal and outputting the signal, and 2 is an output of the signal detecting means 1 for counting the time of no signal state. No-signal-state counting means, 3 is a first storage means for storing that the tape running is unstable when the system switches to a high speed cueing state, and 4 is a first storing means.
Secondly, the non-signal portion is detected when the tape traveling unstable state is stored by the storage means 3 and the count value of the non-signal state counting means 2 is stored when it reaches a certain value τ ₁ . Storage means 5 for counting the fixed time
Counting means 6, second counting means 6 for detecting the rotation of the tape take-up reel stand and counting the number of rotations, and 7 while continuing the high speed cueing state until the first counting means 5 finishes counting. The second counting means 6 controls to perform counting, and after the first counting means 5 finishes counting, the traveling direction is reversed and a high speed cue is made in the opposite direction, and the counting of the second counting means at the end of counting. Reference numeral 8 denotes a control means for controlling a series of operations in which traveling in the opposite direction is continued until the second counting means 6 counts the same number as the numerical value, and 8 denotes no communication in each state of the series of operations by the control means 7. When the state number counting means 2 detects a signalless portion of τ ₂ or more for a certain period of time, it is determined that there is an interval between songs, a series of operations by the control means 7 is released, and a signalless portion of τ ₂ or more is detected. If not, after the series of operations by the control means 7 is completed Inverted fine traveling direction to the initial direction is between songs determining means for controlling so as to perform high-speed cue state.

FIG. 2 is a time chart showing a signal waveform and a system state, and FIG. 2A shows a second chart when a signalless portion of τ ₂ or more is not detected in a series of operations by the control means 7.
FIG. B shows the case where a signalless portion of τ ₂ or more is detected.

FIG. 3 is a flow chart showing the processing contents of each part shown in FIG.

FIG. 2 shows the tape recorder configured as described above,
The operation will be described with reference to FIG.

First, in FIG. 2, when the system is started to perform high-speed cueing in the fast-forward direction at time t = 0, the first storage means 3 stores that the tape running is unstable for a certain period of time. . In FIG. 2, assuming that the tape running is in an unstable state at times t ₁ and t ₂ , and the signal detecting means 1 and the signalless state counting means 2 count the signalless state for a certain time τ ₁ or more. The detection of the non-signal state is stored in the second storage means 4 by the processing of steps 31 to 37 in FIG. 3, and the count value of the second counting means 6 for counting the number of rotations of the take-up reel stand is cleared and initialized. The resetting is performed, and in this state, the first counting means 5 performs counting for a fixed time by the processing of steps 40 and 41 in FIG. 3, and the second counting means 6 is performing the steps 42 to 42 in FIG. By the process of 45, the number of rotations of the tape take-up reel stand is counted. When it is not possible to detect a signalless portion of τ ₂ or more that can be determined to be between songs as shown in FIG. 2A, the first counting means 5 ends counting at time t ₃ in FIG. By the processing of steps 42, 49, and 50 of FIG. 3, the control means 7 controls the traveling direction by reversing the traveling direction so that the high-speed cueing in the rewinding direction is performed and the count value of the second counting means 6 is stored. Performed by. Next, in this state, the second counting means 6
Continues to rewind direction leading position search condition of up to the time t ₄ in FIG. 2 to end the processing by the control unit 7 have been counted value as many counting memory by steps 43-45 of Figure 3, If the no-signal portion detected from time t ₁ to t ₂ is a true tune, the signal detecting means 1 and the no-signal state counting means 2 count the no-signal state for a certain time τ ₂ or more immediately before the time t _4. Is performed, and steps 31 to 33, 3 in FIG.
It is determined by the processing of 8, 39 that it is between the tunes, the stored contents of the second storage means 4 are cleared, and the series of operations by the control means 7 is released. On the other hand, in FIG. ₂ , when the no-signal portion detected from time t ₁ to t ₂ is caused by unstable tape running and is not between tracks, a no-signal portion of τ ₂ or more is detected even at time t _4. Since this is not possible, the inter-track determination means 8 clears the stored contents of the second storage means 4 by the processing of steps 46 to 48 in FIG. 3, controls the traveling direction again and reverses the fast-forwarding direction to a high speed cue state. Is performed.

On the other hand, as shown in FIG. 2B, when a signalless portion of τ ₂ or more is detected during the time t _{3 to} t ₄ when the tape running is in the stable state, the inter-track distance judging means 8 carries out steps 31 to 31 in FIG. 33,38,
The processing of 39 is performed, and the memory for detecting a signalless portion of τ ₁ or more in the tape traveling unstable state by the second storage means 4 is cleared and it is determined that it is between tracks.

As described above, according to the present embodiment, by providing the first counting means 5, the second counting means 6 and the control means 7, it is possible to eliminate a signalless portion having a constant value τ ₁ or more in an unstable tape running state. When it is detected, it continues running for a certain period of time, then reverses and τ ₁
By performing high-speed cueing to the position where the above-mentioned no-signal portion is detected, it is possible to determine again whether or not there is a turn in the tape running stable state. Further, by providing a turn interval determining means 8, the tape running becomes unstable. It is possible to detect a signalless portion in the vicinity that can be more reliably determined to be between tracks than the signalless portion detected in the state, and it is possible to accurately detect the signalless portion in the tape running unstable state. Since it is not necessary to provide the no-signal detection prohibition state in the tape running unstable state, it is possible to accurately determine the inter-track distance even when performing high-speed cueing from the vicinity of the end portion of the music piece in the traveling direction. .

EFFECTS OF THE INVENTION As described above, according to the present invention, by providing the first storage means and the second storage means, it is stored that a no-signal portion is detected for a certain time or more in a tape traveling unstable state at the time of mode switching. Further, the first counting means for counting a fixed time, the second counting means for counting the number of rotations of the tape take-up reel stand, and the state until the first counting means finishes counting. Continuing, in the direction in which the running direction is reversed after the end of counting and the same number of count values counted by the second counting means before the first counting means finishes counting until the second counting means counts again. By providing the control means for controlling so as to continue the high-speed cueing state, it is possible to realize the operation of traveling in a high-speed cueing state by reciprocating from a certain tape position to another tape position that is separated by a certain time or more. Therefore, it is possible to reverse the running direction of the no-signal portion detected in the tape running unstable state, and again determine whether it is a track in the tape running stable state,
Furthermore, in the case where a no-signal portion for a certain period of time or more, during which the control means can determine that there is a music interval, is detected, the no-signal portion is determined to be a music interval, and the series of operations by the control means By providing the inter-track determination means for performing control so as to cancel the storage of the second storage means, it is more effective in determining the inter-track for the no-signal portion detected in the tape running unstable state. Since it is possible to detect a no-signal part with high reliability in the vicinity, it is possible to determine the track interval considering the no-signal part detected when the tape running is unstable. Since it is not necessary to set a prohibition time for counting the time of, it is possible to correctly determine the interval between songs when performing high-speed cueing from the vicinity of the end of the song in the traveling direction. When the song selection feature, since never occur such malfunctions that display address and the current address does not match, it is possible to realize a good tape recorder equipped with a highly accurate cue functions.

[Brief description of drawings]

FIG. 1 is a block diagram showing a tape recorder according to an embodiment of the present invention, FIG. 2 is a time chart showing an operation example of the tape recorder, and FIG. 3 is a flow chart showing processing contents of each part shown in FIG. Is. 1 ... Signal detecting means, 2 ... no signal state counting means, 3 ...
... first storage means, 4 ... second storage means, 5 ... first
Counting means, 6 ... second counting means, 7 ... control means,
8: Music interval determination means.

Claims (1)

[Claims] 1. A first storage means for storing for a predetermined time that the system is in an unstable tape running state when the mode is switched to a high speed cueing state, and the first running means makes the tape running unstable state. Second storing means for storing that a non-signal portion having a certain time τ ₁ or more is detected when a certain thing is stored; first counting means for counting a certain time; Second counting means for starting the counting of the number of rotations of the tape take-up reel base together with storage input to the storing means, and continuing the high-speed cueing state of the system until the first counting means finishes counting, After the completion, the tape running direction of high-speed cueing of the system is reversed, and the count value counted by the second counting means is almost the same as the second counting means until the first counting means finishes counting. Until counts Control means for controlling so as to continue the high-speed cueing state in the reversed direction, and a constant time τ in a series of control operations by this control means.
_{When 2} (τ ₂ > τ ₁ ) or more non-signal portions are detected, it is determined that the non-signal portions are between songs, the stored contents of the second storage means are cleared, and a series of operations by the control means is performed. When the control means is instructed to cancel, and when no signal portion of τ ₂ or more is not detected in the series of operations by the control means, after the series of operations by the control means is finished, the traveling direction is reversed again and A tape recorder comprising: a music interval determining means for instructing the control means so that the running direction is in the high speed cue state.