JPH0312392B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a disc player, and more particularly to a disc player that selectively interlocks with externally connected equipment.

BACKGROUND ART There is a fader device as an external connection device connected to a disc player. This fader device has a built-in automatic volume variable device using, for example, an electronic volume, and if a disc player and a tape deck that are linked to each other are connected to the fader device, the "source in" and "tape deck" provided in the fader device can be By means (for example, a switch) that issues commands such as "in" and "fade out",
It is possible to perform fade-in, fade-out, or cross-fade of the playback signal of the disc player and the playback signal of the tape deck alternately or individually, and furthermore, it is possible to perform fade-in, fade-out, or cross-fade of the playback signal of the disc player and the playback signal of the tape deck. It has the ability to record processed playback signals.

On the other hand, in a disc player, a song gap sensor detects the song gap on a record (disc), and playback is started by lowering the needle tip of the pick-up cartridge to approximately the center between the songs based on the detection output. However, since there are generally unrecorded bands near the intervals between songs where musical tones are not recorded, it takes several seconds to more than ten seconds to trace the surface of the record and reach the recorded band, as mentioned above. It will require.

When such an operation is performed when the fader is linked as described above, the fader device outputs a "source in" or "crossfade" command to the disc player and at the same time starts "fade in" or "crossfade" the playback signal of the disc player. , the ``fade-in'' or ``cross-fade'' operation may be completed while the disc player is still tracing the blank zone, resulting in a failure to obtain a good ``fade-in'' or ``cross-fade'' descent. Become.

Summary of the Invention The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a disk player in which a fader interlocking operation is performed smoothly and a good "fade-in" or "cross-fade" effect can be obtained. .

In the disc player according to the present invention, the means for setting the playback start position of a disc by pick-up changes the playback start position between interlocking and non-interlocking in accordance with information input that distinguishes between interlocking and non-interlocking with an externally connected device. It is structured as follows.

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. In the figure, the inter-track sensor 1 outputs a signal with a level corresponding to the reflectance of the record surface, and as is clear from FIG. A single light emitting element 4, such as a light emitting diode, is used as a common light source, and phototransistors, etc., arranged along the moving direction of a tone arm (not shown) so as to be symmetrical with respect to this light emitting element 4 and the vertical plane, are used as a common light source. It is composed of a pair of light receiving elements 5a and 5b, and is arranged near the needle tip 3. The light receiving element 5a is the third
As shown in the figure, when the tone arm moves toward the outer circumference of the record 6, it precedes the light receiving element 5b and receives reflected light from the record 6 based on the light irradiated from the light emitting element 4, and the amount of light received is Generates output according to. On the other hand, the light-receiving element 5b precedes the light-receiving element 5a when the tone arm moves toward the inner circumference of the record 6, and similarly generates an output corresponding to the amount of light reflected from the record 6. Generally, light is diffusely reflected in the sound groove of the record 6 and totally reflected between songs, so the outputs V _A and V _B of the light receiving elements 5a and 5b are different from each other in the sound groove, as shown in FIG. 4A. The level differs between songs.

The respective outputs of the light receiving elements 5a and 5b are transmitted through amplifiers 4 and 8.
After being amplified by each of the signals, the signals are supplied to the differential amplifier 9. The differential amplifier 9 differentially amplifies a pair of sensor outputs V _A and V _B having mutually different phases, and generates a differential output having a waveform as shown in FIG. 4B. This differential output becomes a comparison input of a comparator 11 that receives the reference voltage V _ref from the reference voltage generation circuit 10 as a reference input. The differential output of the comparator 11 is the reference voltage V _ref
When it exceeds 1, a pulsed inter-track signal is output as shown in FIG. 4C. This inter-song signal is supplied to the system controller 12. The system controller 12 drives and controls the arm drive section 13 and the elevation drive section 14 based on inter-track signals and fader interlock signals supplied from a fader device, which will be described later.

As shown in FIG. 5, the disk player 50 having such a configuration is connected together with a tape deck 51 to a fader device 52 via an external connection terminal (not shown), and selectively operates according to a fader interlocking signal from the fader device 52. It is interlocked with the fader device 52.

Next, the operation of the present invention will be explained.

First, when the feeder is not interlocked, the feeder device 5
2, the system controller 12 of the disc player 50
The arm drive unit 13 is differentially operated to lead in the tone arm (not shown), and the comparator 1
When the inter-track signal (FIG. 4C) is output from 1, an arm stop signal is supplied to the timing arm drive unit 13 at the rising edge of the signal to stop the lead-in operation. After a certain period of time required for the overrun of the tone arm to end, the elevation drive unit 14 is activated to lower the tone arm. By the above-described operation, the stylus 3 of the pick-up cartridge 2 descends to approximately the center of the track on the record 6, and then traces the surface of the record. FIG. 6A shows the movement of the tone arm when the fader is not interlocked.

In FIG. 1, the reference voltage V _ref output from the reference voltage generation circuit 7 takes into account the overrun of the tone arm, and when the tone arm stops after the overrun ends, the stylus tip 3 is approximately at the center of the song. It is set to be located directly above.

During fader interlocking, a fader interlocking signal is input from the fader device 52, so the system controller 12 causes the tone arm to lead in,
When the inter-song signal is output from the comparator 11,
At the timing of the fall, an arm stop signal is supplied to the arm drive section 13 to stop the lead-in operation, and the arm drive section 13 enters a standby state with a signal from the fader device 52. At this time, the tone arm completes the overrun, and the stylus tip 3 is held in an elevated state located above near the inner peripheral end of the song interval (non-recording zone). When a "source in" or "cross fade" command signal is input from the fader device 52, the system controller 12 operates the elevation drive section 14 to lower the tone arm. As a result, the needle tip 3 descends to the vicinity of the inner circumferential end of the song, and playback begins from this descending position. The movement of the tone arm due to the above operation is shown in FIG. 6B.

On the other hand, the fader device 52 is connected to the disk player 5.
The reproduction signal from tape deck 51 is faded in or cross-fade with the reproduction signal from tape deck 51. FIG. 7 shows a temporal change in the playback volume of the fader device 52 during the crossfade of each playback signal of the disk player 50 and tape deck 51. Note that the playback device that is crossfade with the disk player 50 is not limited to the tape deck 51.

In this way, by changing the playback position between when the fader is linked and when it is not linked, a reliable fade-in or cross-fade operation can be obtained. In other words, if you start playback from approximately the center of the song when the fade is linked, as in the case of non-linked fades, as mentioned earlier, it will take several to ten-odd seconds for the stylus to trace the surface of the record and reach the recording band. Therefore, as shown in Figure 8, there is a risk that the fade-in or cross-fade operation will be completed while the stylus is tracing between songs (unrecorded band), resulting in a "fade-in" or "cross-fade." However, when interlocking with the fader, the correct fade operation can be achieved by having the stylus tip immediately start tracing the recording band.

Depending on the record, the width between songs is narrow, and the stylus may drop above the recording band, but since the playback signal from the player is faded in, this will not affect the audibility. Never. However, when the fader is not linked, the first part of the song will not be played, so it is necessary to start playback near the center of the song.

Therefore, by changing the needle tip lowering position, that is, the playback start position, between when the fader is interlocked and when the fader is not interlocked, the fade operation is performed correctly when the fader is interlocked, and the song selection operation is performed correctly when the fader is not interlocked.

In the above embodiment, the lowering position of the needle tip is changed between when the fader is linked and when it is not linked due to the difference in detection timing between songs, but the arm stop signal is generated by keeping the detection timing between songs the same. The lowering position of the needle tip can be similarly changed by changing the timing.

In addition, 30 cm, 25 cm in normal full auto operation
As shown in Figure 9, the lowering position of the stylus tip for cm and 17cm records can be changed between when the fader is linked and when it is not linked by detecting the rise and fall of the drop position signal. It is clear that the arm stop signal generation timing may be changed as described above.

Furthermore, in a player system in which addresses are assigned in the radial direction of the record, the lowering position addresses of 30 cm, 25 cm, and 17 cm may be changed depending on when the fader is interlocked and when it is not interlocked. In addition, in a player system that can search a record once and register the inter-track position as an address, it is also possible to register the inter-track position as an address by changing the address depending on whether the fader is linked or not. The lowered position of the needle tip can be distinguished.

In the above embodiment, a case has been described in which the present invention is applied to a disc player in which audio signals are recorded in an analog manner, but the present invention can also be applied to a digital audio disc player in which audio signals are recorded in a digital manner. The point is that it is sufficient if the playback start position can be changed between when the fader is linked and when it is not linked.
In addition, the fader device 52 is connected to the disk player 50.
Although a case has been described in which the fader device 52 is provided separately, it is also possible to incorporate the fader device 52 as an external connection device into the disc player 50.

Effects As explained above, according to the present invention, since the playback start position is changed between when the fader is interlocked and when it is not interlocked, the fader interlocking operation can be performed smoothly, and when the fader is interlocked, reliable fade-in or A disk player is obtained which can perform a crossfade operation and correctly perform a music selection operation when not interlocked.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention;
FIG. 2 is a schematic perspective view showing the song interval sensor section, FIG. 3 is a diagram showing the positional relationship between the song gap sensor and the song gap, and FIG.
Figures A to C are waveform diagrams of each part in Figure 1, Figure 5 is a connection diagram of the player, deck, and fader device, and Figures 6 A and B are the operation of the tone arm relative to the record when the fader is not interlocked and when the fader is interlocked. Figure 7 showing
The figure shows the time change in playback volume during crossfade in the present invention, Figure 8 shows the time change in playback volume during crossfade in the conventional method, and Figure 9 shows the drop position for each record size in full auto operation. FIG. 3 is a diagram for explaining the operation. Explanation of symbols of main parts, 1...Song sensor, 2
...Pick-up cartridge, 6...Record, 9...Operation amplifier, 11...Comparator,
12... System controller, 50... Disk player, 51... Tape deck, 52... Fader device.

Claims (1)

[Claims] 1. Information input means for distinguishing between interlocking and non-interlocking with an external connection device connected to an external connection terminal,
The disc player selectively operates in conjunction with the externally connected device according to the input information of the information input means, the disc player comprising a setting means for setting a playback start position of the disc by pick-up, and the setting means receives information from the information input means. A disc player characterized in that a playback start position is changed depending on input information between interlocking and non-interlocking. 2. The setting means includes an inter-music detecting means for detecting an inter-musical interval on a disc, and a signal processing circuit for converting an output signal of the inter-musical detecting means into pulses, and a pulse inter-musical signal obtained by the signal processing circuit. 2. The disk player according to claim 1, wherein the replay start position is changed using timings of rising and falling times of .