JPH0581739A - Reproduction device having introduction scanning capability - Google Patents

Abstract

PURPOSE:To eliminate the feeling of having a long and unnecessary introduction reproduction time and to provide a precise introduction scanning operation by varying the reproduction time of an introduction scanning in accordance with the signal level of the introduction to a music and by varying an introduction reproducing time depending on the feature of the music. CONSTITUTION:A CPU 7 controls operations such as a reproduction of a system 1 by controlling various sections such as a DSP 5 in accordance with prescribed program procedures. These operations include various operations such as an introduction scanning for a program searching of music. A detection circuit 8 receives musical signals from a D/A converter 6, detects the volume level of the musical signals and inputs it to the CPU 7. The CPU 7 takes the signal levels from the DSP 5 and performs an introduction scanning control. First, check whether a stop signal is inputted or not and if it is not inputted, check whether it is a start of the tape or not, and enter to an introduction play operation, if it is the start. The reproduction time of an introduction scanning is varied in accordance with the volume level of the introduction to the music.

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 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 finding the beginning of a music piece or the like, but the time for intro-playing the beginning of the piece 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 depending on the characteristics of a song, the intro reproduction time is not felt unnecessarily long, 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 of 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 detecting means for detecting a reproduction signal level of an intro portion of a music piece and the like, and 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 section 2 and a digital receiver 3 for inputting an external analog music signal and a digital music signal, and converts the analog music signal input to the analog input section 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, is output as audio to the outside.

A CPU 7 which controls the entire system controls various operations such as recording and reproduction of the system main 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 inside, a circuit for inputting the analog music signal which is the output of the D / A converter 6, detecting the volume level of the music signal, etc., and outputting 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 (not shown) of the system body 1 and the drum head 1.
The drum motor 14 that drives 0 is controlled. Where D
The SP 5, 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 in which the volume level is higher than the prelude. At this time, it is easy to predict what kind of music music is, so the reproduction time (a) is set to a short time, 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. 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 such as integrating a signal so that the areas of the shaded portions in FIGS. 2 and 3 are constant.

FIG. 4 is a flowchart of the introscan operation executed by the CPU 7, and FIG. 5 is a flowchart of the introplay 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 introduction 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.

The introplay operation will be described with reference to FIG. 5. Playback is performed and the counter value A is set to 0 (# 11). Next, 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 larger than B, or when the tape end or stop occurs at # 12, the introplay operation is terminated. By the above process, 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, It is less likely that you will jump to another song. It should be noted that the present invention is not limited to the configuration of the above 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 changed according to the signal level of the prelude of 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 device 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 introscan 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)

[Claims] 1. A reproducing apparatus having an intro scan function for reproducing a recording medium on which a music signal or the like is recorded to continuously find the beginning of a music piece or the like. A reproducing apparatus having an intro-scan function, comprising: detecting means for detecting; and control means for varying the reproducing time of the intro portion according to the detected signal level.