JPH01256064A - Information recording and reproducing device - Google Patents

Abstract

PURPOSE:To enable an equalizer setting with different frequency characteristics corresponding to the case of AC power source or DC power source by detecting the electric power source and recording equalizer data for each power source as subinformation. CONSTITUTION:A video signal and an audio signal are outputted under reproducing condition corresponding to a subcode signal recorded on a magnetic tape 1 by a processing means 6 to a monitor speaker respectively. Then, at this time, in a control circuit 12, its command is issued so that the equalizer data corresponding to the kind of such electric power source as used at the time of detecting with an electric power detecting means 19 is outputted from a converter circuit 5 to a setting means 7, where a control signal based on the selected equalizer data is given to the equalizer 10 from the setting means 7 via the control circuit 12 to set the frequency characteristics. By this method, the kind of the AC or DC power source is discriminated, so that the characteristics of the equalizer is automatically suited to the present occasion.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a g1 information recording/reproducing device typified by a DAT.

[Summary of the invention]

The present invention records data on the frequency characteristics of an equalizer selected according to the type of power source as sub information on a recording medium, and by detecting the type of power source, the equalizer is set with the corresponding frequency characteristics. It is a technology that enables

[Conventional technology]

As this type of information recording/reproducing device, Japanese Patent Application Laid-Open No. 62-29
As described in Japanese Patent No. 1780, reproduction conditions are set when main information is reproduced, and this is recorded on a recording medium as sub information. Here, a reproduction means for reproducing the main information recorded in the recording medium, a setting means for setting reproduction conditions for the reproduction signal outputted by the reproduction means, and a reproduction means for setting the reproduction signal by the setting means. It is equipped with a processing means for processing according to the conditions, a conversion circuit for converting the reproduction conditions into sub information accompanying the main information, and a recording means for recording the sub information outputted by the conversion circuit on a recording medium. .

[Problem to be solved by the invention]

In such a configuration, the frequency characteristic of the equalizer can be set as one of the reproduction conditions by the setting means, but the equalizer is only controlled by the processing means during reproduction based on the set equalizer data. In this case, only one frequency characteristic of the equalizer is set. However, the frequency characteristics of the equalizer are selected differently depending on whether the music is played back indoors or in a car. For this reason, even though it has a function to set playback conditions, it is necessary to manually adjust the equalizer in the car. The present invention was made based on the above circumstances, and
The present invention attempts to provide an information recording and reproducing device that can determine the type of power source, select equalizer data corresponding to it, and automatically adapt the equalizer characteristics to the local environment.

[Means to solve the problem]

Therefore, in the present invention, a reproduction means for reproducing main information recorded on a recording medium, a setting means for setting reproduction conditions for a reproduction signal outputted by the reproduction means,
processing means for processing the reproduction signal in accordance with the reproduction conditions set by the setting means; a conversion circuit for converting the reproduction conditions into sub information accompanying the main information; and a conversion circuit for converting the sub information outputted from the conversion circuit into a recording medium. In the information recording and reproducing apparatus, the information recording and reproducing apparatus includes a recording means for recording, and the reproduction conditions by the setting means include equalizer data in which frequency characteristics of an equalizer corresponding to the type of power source are set, and the type of the power source is detected. The apparatus includes a detection means, and is configured such that the equalizer data is selected based on a detection signal from the detection means.

【Example】

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings. FIG. 1 is a block diagram when the information recording/reproducing apparatus of the present invention is applied to an 8 mm video tape recorder. In the figure, reference numeral 1 denotes a magnetic tape, and a reproduction signal from a magnetic chip 11 is sent to a conversion circuit 5 via a rotating magnetic head 2 (for convenience, only one is shown), a switch 3, and a reproduction amplifier circuit 4. It has been entered. The conversion circuit 5 separates the input signal into a video signal (and/or audio signal) as main information and a subcode signal as sub information. The main information is input to the processing means 6, and the sub information is further converted into a control signal and input to the setting means 7. The setting means 7 controls the processing means 6 in response to the control signal,
The processing means 6 includes a D/A converter 8. Low pass filter 9. A terminal 11 that outputs a video signal (and/or an audio signal) via an equalizer 10 with a preset function.
12 is a control circuit such as a microcomputer, and a conversion circuit 5. Setting means 7. Controls the equalizer 10, etc. Further, 13 is a recording amplifier circuit for amplifying the signal from the conversion circuit 5 and outputting it to the magnetic tape 1 via the switch 31 and the rotating magnetic head 2. 14 is an input terminal for inputting a signal from an external device, and the input signal from the input terminal 14 is passed through a low-pass filter 15. The signal is input to the processing means 6 via the A/D converter 16. Further, an operation signal is inputted to the control circuit 12 from the operation section 17 by key operation or the like. In addition, the power source input section 18 of this information recording/reproducing apparatus has a power source detecting means 19 that determines whether the type of power source is an AC power source such as a battery or the like for a general DCC electric furnace. A detection signal is outputted from the power supply detection means 19 to the control circuit 12. Then, when a predetermined mode (off mode) signal and a reproduction start signal are inputted to the control circuit 12 by operating the operation unit 17,
The control circuit 12 causes the magnetic tape 1 and the rotary magnetic head 2 to run once at a predetermined speed. As a result, the video signal and audio signal as main information recorded on the inclined track of the magnetic tape 1, as well as the subcode signal as subItyI information are reproduced. At this time, the control circuit 12 switches the switch 3 to the amplifier circuit 4 side, so that the reproduced signal is input to the conversion circuit N15. The conversion circuit 5 separates the input reproduced signal into main information and sub information. The main information is input to the processing means 6 and in the off mode the control circuit 1
2 prohibits output of a control signal from the conversion circuit 5 to the setting means 7. The setting means 7 is configured to allow setting and input of playback conditions by manual operation. As playback conditions, for the video signal, for example, the sharpness (SH^RPNESS) is set to 16 from soft (SOFT) to hard (HARD).
Specify an arbitrary level among the levels of , and similarly set the color s (
COLOR) Hale (PALE) Karabi Hit (vI
VID), Hue (IIUE)
JRPLE) Color green (GREEN), contrast (CONTRAST) from dark (to R) to light (LIGHT), brightness (BHIGHT) from low ([0) to high (HIGH), each of 16 levels. It is possible to specify an arbitrary level from . Similarly, for audio signals, for example, fjL
(VOLUHE), treble (TREBLE), bass (
BASS) etc. from the lowest (MIN) to the highest (14AX)
It may be specified at any level among the 16 levels up to. In the present invention, a plurality of equalizer data can be set as the reproduction conditions so that the frequency characteristics of the equalizer 10 can be selected depending on the type of power source. In addition, when using a two-digit hexadecimal number as data for setting playback conditions, the second digit can be used as data to specify the target of the playback conditions, and the first digit can be used as data to apprentice the level etc. (See Figure 2). The reproduction conditions set by the setting means 7 are outputted as a control signal to the processing means 6, and the processing means 6 processes the video signal and audio signal in response to the control signal. Further, the equalizer data set at that time is input to the control circuit 12, and the control circuit 12 provides a control signal to the equalizer 10 to control the equalizer 10 to have a frequency characteristic based on the equalizer data. In this way, the video signal is output to the monitor and the audio signal is output to the speaker under the reproduction conditions set by the setting means 7. When the off mode is input, the control circuit 12 controls the conversion circuit 5 to output the reproduced subcode signal to the setting means 7, and also outputs the reproduction conditions set by the setting means 7 to the amplifier circuit 13. Prohibit output. On the other hand, when the recording (14RITE) mode is input together with the reproduction start signal, the conversion circuit 5 converts the reproduction conditions set by the setting means 7 into a subcode signal. In this case, the control circuit 12 connects the switch 3 to the amplifier circuit 4 side when the rotary magnetic head 2 serving as a recording or reproducing means corresponds to the video signal recording area, and outputs the reproduced signal as in the off mode. However, when it comes to a position facing the subcode signal (PCM signal) recording area, it is switched to the amplifier circuit 13 side. Therefore, the reproduction conditions set by the setting means 11 are outputted from the conversion circuit 5 as a subcode signal while being viewed and listened to through a monitor and a speaker. In this case, regarding the type of power source, power source detection means 1
The setting means 7 is sent from the control circuit 12 based on the detection signal from 9.
A code signal about the type of power supply and equalizer data of the set frequency characteristics of the equalizer 10 corresponding to this are given to the conversion circuit 5 as playback conditions and output as a subcode signal. Ru. This subcode signal is transmitted to the amplifier circuit 13. It is supplied to the rotating magnetic head 2 via the switch 3 and recorded (after-recording) on the magnetic tape 1. Of course, in this recording mode, the subcode signal extracted from the reproduced signal is sent to the setting means 7. Prohibited from being entered. Next, when the read (to RE8) mode is set and input together with the playback start signal, the control circuit 12 outputs a control signal to the setting means 7 conversion circuit 5 to prohibit input of playback conditions by manual operation, Output to the amplifier circuit 13 is also prohibited. At this time, the conversion circuit 5 separates the video signal, audio signal, and subcode signal from the reproduced signal, converts the former two into a processing means 6, and converts the latter into a control signal, and outputs the control signal to the setting means 7, respectively. The setting means 7 outputs this signal to the processing means 6 in the same way as a manually input signal. Therefore, the processing unit Pi6 outputs the video signal and the audio signal to the monitor and the speaker under the reproduction conditions corresponding to the subcode signal recorded on the magnetic tape 1, respectively. At this time, in the control circuit 12, the power supply detection means 19
A command is given to output the equalizer data corresponding to the type of power supply detected at that time from the conversion circuit 5 to the setting means 7, and from the setting means 7, the data is transmitted to the equalizer 10 via the control circuit 12, and the equalizer data corresponding to the selected equalizer is outputted. Frequency characteristics are set by giving a control signal based on the data. If the subcode signal is pre-recorded in this way, by setting it to read mode, you can always play back the main information under the predetermined playback conditions by simply performing a playback operation. Even if the recording levels are different, each program can be reproduced at a constant volume without operating the volume of the setting means 7 for each program. Furthermore, the setting of the frequency characteristics of the equalizer 10 can be selected depending on the type of power supply at that time. Also, if you play back in recording mode, the set playback conditions will be automatically updated. When the subcode signal is updated in the above recording mode, it is advisable to take precautions to prevent it from being updated inadvertently. For example, when changing from stop mode to playback mode, or from review mode to playback mode, The recording mode can be set to be executed only when the recording mode is changed, but the recording mode is not set when transitioning from the recording mode to the playback mode or from the rewind mode to the playback mode. In order to set predetermined reproduction conditions in recording mode, it is necessary to monitor main information. Therefore, an auto mode may be provided in which the read mode is automatically entered at the beginning of each main information before the record mode is entered. It goes without saying that the present invention can also be applied to information recording and reproducing devices such as R-DAT.

【Effect of the invention】

The present invention has been described in detail above, and has 1! Since the equalizer data for each power source is recorded as side information so that the type of source is detected and the corresponding frequency characteristic of the equalizer is selected, it is possible to
In the case of a DC power source, and in the case of a DC' source powered by a car battery, etc.
! The equalizer can be set with different frequency characteristics corresponding to the case of four sources, etc., and there is no need to manually adjust the equalizer each time the environment differs.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram of reproduction conditions. 1...Magnetic tape, 2...Rotating magnetic head, 3...
- Switch, 4... Reproduction amplifier circuit, 5... Conversion circuit, 6... Processing means, 7... Setting means, 10...
Equalizer, 11...output terminal, 2...control circuit,
13... Recording amplifier circuit, 14... Input terminal, 17
...Operation unit, 18...Power input section, 19...Power detection means. Figure 2:

Claims (1)

[Claims] a reproduction means for reproducing main information recorded on a recording medium; a setting means for setting reproduction conditions for a reproduction signal outputted by the reproduction means; and a setting means for setting reproduction conditions for a reproduction signal output by the reproduction means; A processing means for processing;
In an information recording and reproducing apparatus comprising a conversion circuit for converting the reproduction conditions into sub information accompanying main information, and a recording means for recording the sub information outputted by the conversion circuit on a recording medium, the reproduction conditions according to the setting means are provided. includes equalizer data in which frequency characteristics of an equalizer are set corresponding to the type of power supply, and includes a detection means for detecting the type of power supply, and the equalizer data is selected by a detection signal of the detection means. An information recording and reproducing device characterized in that it is configured as follows.