JPH03260981A - Reproducing device - Google Patents

Abstract

PURPOSE:To reduce a standby time in intermusic by changing a data write speed in a temporary storage means and a data read-out speed from a means and simultaneously changing the data write speed in proportion to the reproducing speed of a tape. CONSTITUTION:While the tape is reproduced, a tape speed varying means 17 makes the traveling speed of the tape double, for example, and simultaneously makes the write speed in the temporary storage means 14 double which is the same as the speed of the tape. Then, when the read-out speed is set to be the ordinary reproducing speed, difference between the write speed and the read-out speed is increased and it is maintained during a prescribed time. Next, a microcomputer for controlling a system 9 checks the music number of data which is reproduced, outputs a write stop command to an address speed varying means 18 as soon as the music number is changed and gives a high- speed traveling command to the means 17. When the position of the tape becomes the next music number, the computer 9 gives a write command to the means 18. Thus, a next music is reproduced without the standby time when the reproduced music on a medium is finished.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a reproducing device such as a tape player.

2. Description of the Related Art Taking a conventional digital audio tape recorder as an example, an example of the configuration of its playback section is shown in FIG.

In FIG. 4, a signal reproduced from a head 1 is amplified and waveform-shaped by an RF amplifier 2, demodulated by a signal processing section 3, error-corrected, and then supplied to a D/A converter 4. The servo circuit 5 includes a cylinder 6 and a capstan motor,
- Performs the speed control and phase control of the reel motor 8 as well as the speed control of the reel motor 8. 17 is a data playback speed variable means for varying the data playback speed, and 9 is a system control microcomputer.

In this conventional example, so-called program music selection, in which a plurality of music pieces are selected in advance and automatically played, is performed as follows, for example. The song numbers are recorded in the sub-data area, and the designated song numbers are stored in the system control microcomputer 9 and selected sequentially.

FIG. 5 shows how each reproduction is performed at this time. In Figure 5, the horizontal axis is time, and 10, 11.12 are number N.
1. N2. Indicates N3, the shaded area is the playback section of each time above,
A broken line 14 indicates the section to move to the next song. For example, after playing the song number N1, the system control microcomputer 9 searches for the next number N2 recorded on the sub-data by running at high speed.

Problems to be Solved by the Invention However, in the configuration of the conventional example described above, even a high-speed search of about 200 times the normal reproduction speed requires a search time of several seconds to several tens of seconds. Therefore, there is a problem in that the user is forced to wait for several seconds to several tens of seconds while moving between songs.

In view of the above-mentioned problems, the present invention uses a temporary storage means, changes the data writing speed to the temporary storage means and the data reading speed from the temporary storage means, and changes the data writing speed in proportion to the tape playback speed. The purpose of this is to reduce the waiting time between songs.

Means for Solving the Problems In order to solve the above problems, the reproducing apparatus of the present invention includes a recording medium reproducing means for reproducing data from a data recording medium;
data reproduction speed variable means for varying the data reproduction speed from the data recording medium; temporary storage means for temporarily storing the data; write address generation means for writing the data into the temporary storage means; The apparatus includes read address generation means for reading data from temporary storage means, and write address speed variable means for varying the write address of the write address generation means in proportion to the data reproduction speed.

According to the above-described configuration, the present invention writes the reproduced data from the data recording medium to the recording temporary storage means at a speed proportional to the data reproduction speed during the reproduction of (2), and reads the data from the temporary storage means at the normal reproduction speed. . At this time, by setting the read speed to the normal playback speed and making the data playback speed faster than the normal playback speed, it is possible to advance the playback position of the recording medium without affecting the playback sound. Therefore, it is possible to proceed to the next song on the recording medium when the reproduced song on the recording medium ends while the data is being reproduced from the temporary storage means.

Embodiment FIG. 1 is a block diagram showing a reproducing apparatus in an embodiment of the present invention, and FIG. 2 is a diagram showing address changes in temporary storage means.

In FIG. 1, 1 to 9.17 are the same components as in FIG. The signal reproduced from head 1 is sent to RF amplifier 2.
The signal is amplified and waveform-shaped, and further demodulated and error-corrected in the signal processing section 3. The signal 13 from the signal processing section 3 is written into the temporary storage means 14 at a write address 15. Further, data is read from the time storage means 14 according to the read address 16 and is supplied to the D/A converter 4.

2L22 each write address 15. A generating circuit 18 generates the read address 16, and write address speed variable means 18 varies the write address 15.

FIG. 2 shows address changes in the temporary storage means 14. The write address 15 and the read address 16 are each cyclic addresses.

In FIG. 2(a), the circles indicate the locus of the cyclic address, and the address difference 20 gives a time delay. here,
Considering the capacity required for the temporary storage means 14, assuming that the sampling frequency is 48kHz1, the number of quantization bits is 16 bits, and the data is stored for 40 seconds, two channels are used.
A 2.times.48000.times.16.times.40 bit, ie approximately 61 megabit, semiconductor memory element may be used as the temporary storage means 18. Since the D search time from the beginning to the end of a 2-hour tape is approximately 40 seconds at 200x speed, the above capacity is the maximum value. Since a normal search is considered to take about 5 seconds, a capacity of about 8 megabits for the temporary storage means 18 is sufficient. FIG. 3 shows the state of reproduction according to the configuration of the present invention. That is, the signal on the tape and the temporary storage means 14
The relationship between the read signal from the tape and the tape speed is shown. The processing steps are shown below.

(First step) Let us assume that we have started to play back track number N1 at normal speed. At this time,
In accordance with instructions from the system control microcomputer 9, the write address speed variable means 18 sets the write address 15 and the read address 16 to be the same. Write address 15
The read address 16 is as shown in FIG. 2(b).

(Second Step) When the tape playback position reaches point PL (19), the tape speed variable means 17 sets the tape running speed to, for example, twice, in response to a command from the system control microcomputer 9. If it is about twice as large, it is not so difficult to process it with the RF amplifier 2 or the signal processing section 3. At the same time, the write speed of the write address 15 to the temporary storage means 14 is set to the same speed as the tape running speed, that is, twice the speed. Further, the read speed of the read address 16 is set to be the same as that for normal playback. As a result, write address 15 and read address 1
The difference with 6 gradually increases.

(Third step) After further playing the tape, the tape speed variable means 17
For example, the above processing is continued for 9 seconds (section 23 in FIG. 3), and after 9 seconds, the processing is returned to the normal playback speed. Since the tape playback speed is double speed, approximately 18 seconds worth of data on the tape is thereby written to the temporary storage means 14. This operation results in a difference of 9 seconds between when data is written to the temporary storage means 14 and when it is read. Write address 15 and read address 16 are the second
The result will be as shown in Figure (C).

(Fourth step) The system control microcomputer 9 checks the track number in the sub-data to be reproduced from the tape, and at the same time as the track number changes, it issues a write stop command to the write address speed variable means 18, and the tape speed Normal running ratio 200 in variable means 17
A double speed high speed running command (section 24 in FIG. 3) is given.

(Fifth step) When the tape position reaches the next track number N2 (11), the system control microcomputer 9 gives a write start command to the write address speed variable means 18. The write address 15 and read address 16 are as shown in FIG. 2(d). The difference 20 at this time will be taken into consideration during the next run.

Effects of the Invention As described above, the present invention includes a recording medium reproducing means for reproducing a data recording medium, a data reproducing speed variable means for varying the data reproducing speed from the data recording medium, a temporary storage means for temporarily storing the data, and a data recording medium reproducing means for reproducing data from the data recording medium. write address generation means for writing data into the temporary storage means; read address generation means for reading data from the temporary storage means; address variable means for varying the writing speed of the write address; By providing a write address speed variable means for varying write addresses, it is possible to eliminate the waiting time between songs, which was inconvenient when playing a plurality of songs in a conventional digital audio tape device, etc. The time can be eliminated or reduced, and music can be played efficiently.

[Brief explanation of drawings]

1 is a transverse flute of a playback device in an embodiment of the present invention. 3 is a timing diagram showing the state of playback in an embodiment of the present invention. FIG. 4 is a configuration 9 of a conventional playback device: a system control microcomputer; 14...Temporary storage means,
17... Tape speed variable means, 18... Write address speed variable means, 21... Write address generation circuit, 22... Read address generation circuit.

Claims (1)

[Scope of Claims] Recording medium reproducing means for reproducing data from a data recording medium; data reproducing speed variable means for varying the data reproducing speed from the data recording medium; temporary storage means for temporarily storing the data; write address generation means for writing the data into the temporary storage means; read address generation means for reading the data from the temporary storage means; and write address generation means for the write address generation means in proportion to the data playback speed. A playback device comprising variable write address speed variable means.