JPS6146910B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape recorder capable of numerically displaying the difference level between a reference level and a recording level on a display unit.

In recent years, various types of compact tape recorders that are convenient to carry have been developed. Some of these tape recorders can display the recording level, but this recording level display is mostly an analog display using a meter needle, and moreover, the recording level is not displayed in relation to the appropriate recording level, that is, the reference level.
As a result, variations in level occur during recording.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a tape recorder that is easy to use and can numerically display the level of the difference between the recording level and the reference level.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows the external appearance of a tape recorder with a small electronic calculator according to this embodiment. Inside the elongated case 1, there are circuits that make up the tape recorder, a tape drive mechanism, and a small electronic calculator. Circuits etc. are integrated. Further, on the front side of the case 1, there is a cassette loading section 4 in which a cassette 3 is loaded by opening the lid 2, and a key button 5 of the calculator.
...and, for example, an 8-digit digital display section 6 is provided. Furthermore, the outer surface of the case 1 is provided with various operation buttons of the tape recorder, such as a record button 7, a play button 8, a stop button 9, and the like.

The case 1 has a built-in recording level detection device. This recording level detection device is constructed as shown in FIG. 2, for example. That is, the recording level of the tape recorder section 11 is detected by the detection circuit 12, and the output of this circuit 12 is introduced into one input terminal of the comparison calculation circuit 13. The comparison calculation circuit 13 introduces the reference level signal from the reference circuit 14 into the other input terminal, and outputs the decibel difference between the two. The output of the comparison arithmetic circuit 13 is held in a latch circuit 16 via an AD converter 15. The above A-D converter 15 is the computer section 1
When a specific key button on the keyboard 18 of No. 7 is operated, an output is sent out. Further, the key button operation signal is provided as a latch signal to the latch circuit 16 via the code converter 19. Then, the contents held in the latch circuit 16 are read out by the multiplexer 20, and the read signal is sent to the decoder 2.
1 to the display section 6 of the computer section 17. The multiplexer 20 and the display section 6 are operated by the output of the scan converter 22,
This scan converter 22 is operated by output pulses from a clock pulse generator 23. Note that the scan converter 22 sends out an output only when a specific key button on the keyboard 18 is operated.

With such a configuration, computer section 1 is
When a specific key button on the keyboard 18 of 7 is operated, a number indicating the difference between the reference recording level and the current recording level, such as "+3.2 dB" or "-1.4 dB", appears on the display section 6 of the calculator section 17. is displayed digitally. Therefore, the operator can adjust the recording level, such as changing the position of the microphone, by looking at the display.

Note that the display method on the display section 6 can be selected as appropriate, and it may be arranged such that (+) is displayed only when the recording level exceeds a preset reference level. Alternatively, only the (+), (0), and (-) symbols may be displayed without displaying the numbers. Furthermore, these may be used in combination to selectively display "dB" or only symbols.

As described in detail above, according to the present invention, a display section is provided and the level of the difference between the recording level and the reference level is displayed numerically on the display section, so that the operator can You can easily adjust the recording level. Furthermore, if configured as in the embodiment, the tape recorder and the computer are integrated into the case, allowing the display and power source (battery) to be shared, and the computer's circuitry also allows for comparison calculations between the recording level and the reference level. It can also be carried out using a simple structure and compact, making it extremely convenient to carry. In addition, an integrated calculator calculates the difference between the recording level and the reference level, and the difference is digitally displayed on the display of the calculator, so responsiveness to level difference calculation and display is good. Moreover, the displayed value can be recognized by reading it at a glance. Furthermore, by integrating the computer and tape recorder, both the tape recorder function and calculation function can be realized without increasing the size of the tape recorder. This improves the operability of the tape recorder.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is an external perspective view, and FIG. 2 is an explanatory diagram illustrating the configuration of the recording level detection means.

Claims (1)

[Claims] 1. A recording level detection means for detecting the recording level in a tape recorder that integrally combines a tape recorder section for recording and playback and a small electronic computer section having a digital display section, and a recording level detected by this recording level detection means. Comparing means for comparing the level with a reference level to obtain a difference level signal representing the difference between the recording level and the reference level;
A tape recorder comprising means for numerically displaying the difference level signal from the comparison means on a digital display section of a small electronic computer section.