JP2541045B2 - Playback device with introscan function - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape recorder, a compact disc (CD) or the like, and particularly to an intro for continuously reproducing a tape or the like on which a music signal or the like is recorded and cuing a music piece or the like. The present invention relates to a reproducing device having a scan function.

[0002]

2. Description of the Related Art Conventionally, in this type of reproducing apparatus,
Some have an intro-scan function for continuously cueing a music song or the like, but the time for intro-playing the beginning of a song is about 10 seconds, and this time is fixed.

[0003]

In such a conventional device, the intro reproduction time may be felt to be long due to the length of the prelude of a song, or the player may jump to the next song without knowing what kind of music it is. . The present invention solves the above-mentioned problems, and the intro reproduction time does not change unnecessarily because the intro reproduction time changes according to the characteristics of the song, and the kind of music is unknown. It is an object of the present invention to provide a reproducing apparatus having an introscan function that does not jump to the next song as it is.

[0004]

In order to achieve the above object, the present invention has an introscan function for reproducing a recording medium on which a music signal or the like is recorded and continuously cuing a music piece or the like. The reproducing apparatus is provided with a detecting means for detecting a reproduction signal level of an intro portion of a music piece and the like, and a control means for varying a reproduction time of the intro portion according to the detected signal level.

[0005]

According to the above construction, the detecting means detects the reproduction signal level of the intro portion of a music piece or the like, and the control means changes the reproduction time of the intro portion according to the detected signal level. As a result, the intro reproduction is performed for an appropriate time according to the characteristics of the prelude of the music.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A system in which the present invention is applied to DAT will be described below with reference to the drawings. FIG. 1 shows the functional block configuration of this system. In the figure, the system body 1
Has an analog input unit 2 and a digital receiver 3 for inputting an analog music signal and a digital music signal from the outside, and converts the analog music signal input to the analog input unit 2 into a digital music signal. For A
A / D converter 4 and a digital signal processor (hereinafter referred to as DSP) 5 for processing the digital music signal converted by the A / D converter 4 and the digital music signal input to the digital receiver 3. ing. DSP
The digital music signal processed in 5 is converted into an analog music signal by the D / A converter 6, and after conversion, it is output as audio to the outside.

A CPU 7 for controlling the entire system controls various operations such as recording and reproduction of the system body 1 by controlling the DSP 5 and the like according to a predetermined program procedure. The operation includes an intro scan operation for cuing a music piece. The detection circuit 8 has a built-in A / D converter, receives the analog music signal output from the D / A converter 6, detects the volume level of the music signal, etc., and outputs it to the CPU 7. Is. RFAMP9 is
A digital music signal from the DSP 5 is modulated during signal recording, and the signal is recorded on the tape 11 (recording medium) by the drum head 10. Further, the RFAMP 9 demodulates the digital signal read from the tape 11 during reproduction and inputs it to the DSP 5. Based on the control of the CPU 7, the servo LSI 12 drives the capstan motor 13 (not shown) of the system body 1 and the drum head 1.
The drum motor 14 that drives 0 is controlled. Where D
The SP5, the CPU 7, the detection circuit 8 and the like constitute a detecting means for detecting a reproduction signal level of an intro portion of a music piece and the like, and a control means for varying a reproduction time of the intro portion according to the detected signal level. The CPU 7 is a DSP
The introscan control may be performed by taking in the signal level from No. 5.

2 and 3 show how the reproduction time of the intro scan is varied. FIG. 2 shows a case where the volume level is higher from the prelude. At this time, it is easy to predict what kind of content the music is, so the reproduction time (a) is set to be short, for example, about 7 seconds. FIG. 3 shows the case where the fade-in is long and the volume level of the prelude is low, and in this case, the reproduction time (b) is set longer, for example, about 15 seconds. In addition to varying the time according to the volume level as described above, control may be performed by a method of integrating signals so that the areas of the shaded portions in FIGS. 2 and 3 are constant.

FIG. 4 is a flow chart of the intro scan operation executed by the CPU 7, and FIG. 5 is a flow chart of the intro play operation. The introscan operation will be described with reference to FIG. 4. First, it is checked whether the tape stop signal is input (# 1). If the stop signal is not input, it is checked whether it is the tape start end (# 2). , The introplay operation is started (# 3), and if it is not the start end, rewinding (rewind) is performed (# 7), and the process returns to # 1. After the intro play operation, fast forward (FF) is performed (# 4) to check whether it is the tape end or stop (#
5) If not, it is checked whether it is a music interval (# 6). If it is a music interval, the process returns to # 3. If the stop signal is input in # 1, or if it is the tape end or stop in # 5, the process returns.

To explain the intro play operation with reference to FIG. 5, reproduction (play) is performed and the counter value A is set to 0 (# 11). Then, it is checked whether it is the tape end or the stop (# 12). If not, the reproduction signal level X is added to the previous A to update the value, and this is set as A (# 1).
3). Then, after waiting for a predetermined time (# 14),
It is checked whether A is smaller than a predetermined constant value B (# 1
5). When it is smaller, the process returns to # 12 and the same operation is repeated. When A becomes equal to or greater than B, and when the tape end or stop occurs at # 12, the introplay operation is terminated. With the above processing, the playback time of the intro scan can be changed appropriately according to the volume level of the prelude of the song, so the playback time of the intro scan can be felt unnecessarily long, or the next song can be played without understanding the content of the song. It is less likely that you will jump to another song. The present invention is not limited to the configuration of the above-described embodiment, and various modifications can be made. For example, the present invention can be similarly applied to an analog reproducing device.

[0011]

As described above, according to the present invention, since the reproduction time of the intro scan is varied according to the signal level of the prelude to the music, the intro reproduction time may be felt unnecessarily long as in the conventional case. Precise intro scan operation is possible without jumping to the next song without knowing the music.

[Brief description of drawings]

FIG. 1 is a block diagram of a playback device according to an embodiment of the present invention.

FIG. 2 is a relationship diagram between a signal level and time showing the operation of the apparatus of this embodiment.

FIG. 3 is a relationship diagram between a signal level and time showing the operation of the device of this embodiment.

FIG. 4 is a flowchart of an intro scan operation of the apparatus of this embodiment.

FIG. 5 is a flowchart of an introduction operation of the apparatus of this embodiment.

[Explanation of symbols]

 5 DSP 7 Microcomputer 8 Detection circuit 10 Drum head 10 11 Tape

Claims (1)

(57) [Claims] 1. In a reproducing apparatus having an introscan function for reproducing a recording medium on which a music signal or the like is recorded and continuously finding the beginning of a music piece or the like, the reproduction signal level of the intro portion of the music piece or the like is set A reproducing apparatus having an intro scan function, comprising: a detecting unit for detecting and a control unit for varying a reproducing time of the intro portion according to the detected signal level.