JPH01125077A - Still video recorder - Google Patents

Abstract

PURPOSE:To eliminate the use of an external sound recorder, to make an operation easier, and to suppress the deterioration in quality of a sound by reproducing a sound signal already recorded on a recording medium, synthesizing it with a sound signal supplied from the external, and recording thus synthesized sound signal again on the same recording medium. CONSTITUTION:A sound signal reproduced in a recording and reproducing part is temporarily moved to a reproduction-only memory 10. The signal is time-expanded by a time expander 11, and subjected to a D/A converter 12 to be returned to a sound signal again. This reproduced sound signal is inputted from a sound signal input terminal 1, and is added with a sound signal level- adjusted by an adjuster 2 by an adder 3. Thus added sound signal is encoded by an A/D converter 4, temporarily stored in a recording-only memory 9, and time-compressed by a time compressor 8, thereafter, the signal is recorded anew by the recording and reproducing part 9. Like this, a reproduced sound signal and an input sound signal are synthesized by using a memory and a synthesizing means, and the result is re-recorded on the same recording medium, therefore, no other recorder needs to be used.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a still video recorder (still image recording and reproducing device) that is capable of recording and reproducing audio signals together with still images on a recording medium.

(Prior Art) Conventional still video recorders capable of recording audio signals only record audio signals supplied to line input terminals, etc. during recording, and record audio signals from a floppy disk during playback. All it did was output the audio signal recorded on the signal track.

(Problem to be solved by the invention) Therefore, conventionally, when you want to add musical sounds such as BGM (background music) to the audio information already recorded on the floppy disk, or add messages such as narration later, , the recording (copy) of the audio information recorded on the floppy disk must be transferred to an external recording device such as a tape recorder, the audio information must be mixed and processed by the external recording device, and then recorded on the floppy disk again. In this case, not only was the operation extremely complicated, but also the sound quality deteriorated significantly since another recording medium was passed through the recording medium.

Therefore, the present invention makes it possible to add a new audio signal to the already recorded audio signal and synthesize it without using an external recording device, and record it as it is on the same floppy disk (recording medium), which makes it easier to operate. To provide a still video recorder which is easy to use and reduces deterioration in sound quality.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a still video recorder capable of recording and reproducing an audio signal together with a still image signal on a disk-shaped recording medium. an audio signal synthesizing means for synthesizing an input audio signal inputted from the recording medium and a reproduced audio signal reproduced from the recording medium; and an audio signal recording means for recording the audio signal synthesized by the audio signal synthesizing means on the recording medium again. It is characterized by what it did.

[For production]

In the present invention, with this configuration, while reproducing the audio signal already recorded on the recording medium, it is synthesized with the audio signal supplied from the outside, and the synthesized audio signal is re-recorded as it is on the same recording medium. be able to. Therefore, there is no need to use an external recording device, the operation is simple, and there is little deterioration in sound quality.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

A. First Embodiment FIG. 1 shows the circuit configuration of a first embodiment of the present invention. In this figure, 1 is an audio signal input terminal, and 2 is an input signal level adjuster (for example, a variable resistor) that adjusts the level of an input audio signal sent from an audio source such as a microphone through the audio signal input terminal 1. 3 is an analog adder that synthesizes the input audio signal output from the adjuster 2 and a reproduced audio signal to be described later; 4 is an analog adder A that encodes the analog audio signal output from the adder 3 into a digital audio signal.
/D converter (analog, digital converter)) 6 is a recording-only memory that temporarily stores the digital audio signal output from the A/D converter 4, such as RAM (
random access memory).

8 is a time compressor that performs time compression processing to compress the memory output read from the recording-only memory 6 in the time axis direction; 9
is a recording/reproducing unit, such as a still video floppy disk device, which records and reproduces the output signal from the time compressor 8 in a still video format.

IO is a reproduction-only memory that temporarily stores the reproduced signal reproduced from the above-mentioned recording and reproduction section 9, and uses, for example, a RAM. 11 is a time expander that performs time expansion processing to expand the memory output read from the read-only memory IO in the time axis direction and return it to the original real-time signal; 12 is a time expander 1
This is a D/A converter (digital-to-analog converter) that converts the digital signal output from 1 into an analog signal. The output signal of the D/A converter 12 is sent to the above-mentioned adder 3 as a reproduced analog audio signal (reproduction signal), and is also sent to the audio signal output terminal 13.

A speaker or the like is connected to the audio signal output terminal 13, and the user can perform a mixing operation to add new audio information while checking the reproduced audio information.

The above-mentioned recording-only memory 6 also functions to determine the recording timing, and the timing of recording to the recording/reproducing section 9 is determined by the system controller (not shown) to the same track when audio is played back on the recording medium, or to a specified different track. is controlled so that it is recorded.

Next, the overall operation of this embodiment will be explained. Since the audio signal reproduced by the recording/reproducing section is compressed in the time axis direction, it is once transferred to the reproduction-only memory IO, then time-expanded by the time expander 11, passed through the D/A converter 12, and then converted back into an audio signal. The reproduced audio signal is output to the audio signal output terminal 13 and monitored by a speaker, etc. At the same time, the audio signal input from the audio signal input terminal 1 and whose level has been adjusted by the adjuster (volume) 2 and the adder 3 Add with . The added audio signal is encoded by the A/D converter 4, temporarily stored in the recording-only memory 6, time-compressed by the time compressor 8, and then recorded anew by the recording/reproducing section 9.

B. Second Embodiment FIG. 2 shows the circuit configuration of a second embodiment of the present invention. In this figure, 5 is an addition register connected between the A/D converter 4 and the recording-only memory 6;
is the output signal 102 of the A/D converter 4 and the time expander 11
A composite signal obtained by adding the output signal 101 of the output signal 101 is sent to the recording only memory 6.

Therefore, in this example, the analog adder 3 described above is not connected. The rest of the configuration is the same as the first embodiment shown in FIG.

In the embodiment shown in FIG. 1 described above, the reproduced signal is converted back to an analog audio signal and then synthesized with the input signal, but in the second embodiment, the actual signal is synthesized before converting it back to analog (before D/A conversion). Adding the time digital reproduction signal 101 and the real time digital input signal 102 after A/D conversion using the addition register 5,
Write to the recording-only memory 6. Next, the signal read out from the memory 6 after being time-compressed by the time compressor 8 is read out by the recording/reproducing unit 9.
to re-record it to a floppy disk.

C0 Third Embodiment FIG. 3 shows the circuit configuration of a third embodiment of the present invention. In this figure, an addition register 5 is connected between the time compressor 8 and the recording/reproducing section 9, and this addition register 5 is connected to the time compressed digital playback signal 103 output from the playback-only memory IO. and the time-compressed digital input signal 104 output from the time compressor 8 are combined by addition and sent to the recording/reproducing section 9. The rest of the structure is the same as the embodiment shown in FIG.

In the embodiment shown in FIG. 3, the reproduction signal stored in the reproduction-only memory 10 is time-expanded by the time expander 11, and the D/A
The signal is output to the audio signal output terminal 13 via the converter I2.

While monitoring this output audio signal with a speaker, etc., input the audio signal you want to superimpose on the reproduced signal from the audio signal input terminal l using a microphone or audio device, and then
The input signal 104 processed by the converter 4, the recording-only memory 6, and the time compressor 8 and the reproduced signal 103 stored in the reproduction-only memory 10 and read out are added to the register 5 for addition.
and the added composite signal is recorded again by the recording/reproducing section 9.

In the first and second embodiments described above, a single memory is used as both the recording memory 6 and the reproduction memory lO,
It is also possible to write new data while reading data.

(Effects of the Invention) As explained above, according to the present invention, since a memory is always required for recording and reproducing audio signals of a still video recorder, this memory and a synthesizing means are used to combine reproduced audio signals and input signals. Since the audio signal is synthesized and re-recorded on the same medium, there is no need to use another recording device, and it is easy to combine the recorded audio signal and an external device with less deterioration in sound quality. This has the effect of being able to synthesize the input audio signal.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a circuit configuration of a first embodiment of the present invention, FIG. 2 is a block diagram showing a circuit configuration of a second embodiment of the present invention, and FIG. 3 is a block diagram showing a circuit configuration of a second embodiment of the present invention. FIG. 2 is a block diagram showing a circuit configuration of an example. l... Audio signal input terminal, 2... Input signal level adjuster, 3... Analog adder, 4... A/D converter, 5... Register for digital signal addition, 6...・Recording only memory, 8... Time compressor, 9... Recording and reproducing section, lO... Reproducing only memory, 11... Time expander, 12... D/A converter, 13...・Audio signal output terminal.

Claims (1)

[Claims] 1) In a still video recorder capable of recording and reproducing an audio signal together with a still image signal on a disk-shaped recording medium, an input audio signal input from an audio signal input terminal and an input audio signal input from the recording medium are reproduced from the recording medium. A still video recorder comprising: an audio signal synthesizing means for synthesizing the reproduced audio signals; and an audio signal recording means for recording the audio signals synthesized by the audio signal synthesizing means on the recording medium again. . 2) A patent characterized in that the still video recorder has an internal storage means for temporarily storing the audio signal synthesized by the audio signal synthesizing means or the input audio signal before being synthesized by the audio signal synthesizing means. A still video recorder according to claim 1.